CN109249338A - A kind of electric screw driver - Google Patents
A kind of electric screw driver Download PDFInfo
- Publication number
- CN109249338A CN109249338A CN201811353269.2A CN201811353269A CN109249338A CN 109249338 A CN109249338 A CN 109249338A CN 201811353269 A CN201811353269 A CN 201811353269A CN 109249338 A CN109249338 A CN 109249338A
- Authority
- CN
- China
- Prior art keywords
- torque
- electric screwdriver
- driving
- pole permanent
- magnetic
- 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
- 230000005540 biological transmission Effects 0.000 claims description 21
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses a kind of electric screw drivers, comprising: shell；Driving portion provides operation power for the electric screw driver；Driving section, the power input terminal of the driving section and the driving end of the driving portion are coaxially connected；Torque adjusting portion, for adjusting the output torque of the electric screw driver, the moment input end in the torque adjusting portion and the power output end of the driving section are coaxially connected；And enforcement division, it is installed on the front end of the shell, the front end of the enforcement division is used for fixed screw cutter head, and the torque output end in the rear end of the enforcement division and the torque adjusting portion is coaxially connected.The torque of output can be adjusted in a kind of electric screw driver of the invention, will not damage bolt.
Description
Technical Field
The invention belongs to the technical field of mechanical assembling tools, and particularly relates to an electric screwdriver.
Background
An electric screwdriver, also known as a screwdriver or an electric screwdriver, is an electric tool for screwing and unscrewing screws. The electric tool is provided with a mechanism for adjusting and limiting torque, is mainly used for assembly lines, and is one of necessary tools for most production enterprises.
The existing pneumatic screw driver uses air to drive a pneumatic motor and uses a knocking block to do work. The bolt is not rotated, but continuously knocked, so that effective torque fixing cannot be achieved, the bolt is damaged to a certain extent, and cracks are knocked out sometimes.
Disclosure of Invention
The technical purpose of the invention is to provide an electric screwdriver which can adjust the output torque without damaging bolts.
In order to solve the problems, the technical scheme of the invention is as follows:
an electric screwdriver comprising:
a housing;
the driving part is used for providing working power for the electric screwdriver;
the force input end of the transmission part is coaxially connected with the driving end of the driving part;
the torque adjusting part is used for adjusting the output torque of the electric screwdriver, and the torque input end of the torque adjusting part is coaxially connected with the force output end of the transmission part; and
the execution part is installed at the front end of the shell, the front end of the execution part is used for fixing a screwdriver head, and the rear end of the execution part is coaxially connected with the torque output end of the torque adjusting part.
According to an embodiment of the present invention, the torque adjusting portion is a hysteresis torque adjuster, including:
a magnetic hysteresis loop;
a magnetic torque input shaft, a first end side of which is coaxially connected with a force output end of the transmission part; and
a magnetic torque output shaft, a first end side of the magnetic torque output shaft and a rear end of the execution part are coaxially connected;
wherein,
a cylindrical cavity is formed in the second end side of the magnetic torque output shaft along the axial direction of the magnetic torque output shaft, a plurality of first N-pole permanent magnets and a plurality of first S-pole permanent magnets are attached to the inner wall of the cylindrical cavity, and the first N-pole permanent magnets and the first S-pole permanent magnets are alternately attached to the inner wall of the cylindrical cavity along the circumferential direction of the inner wall of the cylindrical cavity;
the second end side of the torque input shaft is arranged in the cylindrical cavity, a plurality of second N-pole permanent magnets and a plurality of second S-pole permanent magnets are attached to the outer wall of the second end side of the torque input shaft, and the second N-pole permanent magnets and the second S-pole permanent magnets are alternately attached along the circumferential direction of the torque input shaft;
the magnetic hysteresis loop is sleeved on the second end side of the torque input shaft;
and under the working state of the electric screwdriver, the torque input shaft and the torque output shaft are magnetically coupled and synchronously rotate.
According to an embodiment of the present invention, the transmission portion includes:
the driving gear is coaxially connected with the driving end of the driving part;
the driving gear of the idle gear is meshed with the driving gear;
and the driven gear is meshed with the driven wheel of the idle gear and is coaxially connected with the first end side of the magnetic torque input shaft.
According to an embodiment of the present invention, a coupling shaft of the driven gear and the magnetic torque input shaft is provided with a heat dissipating fan, and the heat dissipating fan rotates along with the coupling shaft to generate heat dissipating wind blowing toward the transmission portion.
According to an embodiment of the present invention, the driving portion includes a dc motor and a forward/reverse switch for controlling forward/reverse rotation of the dc motor, the dc motor is disposed in the inner cavity of the housing, and the switching portion of the forward/reverse switch is disposed on the outer shell of the housing.
According to an embodiment of the present invention, the driving portion includes a pressure switch that also controls a rotation speed of the dc motor, and the pressing portion of the pressure switch is provided on the outer shell of the housing.
According to an embodiment of the present invention, the housing of the housing is provided with a vent hole.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1) the electric screwdriver in one embodiment of the invention can adjust the output torque of the electric screwdriver by arranging the torque adjusting part, can adjust and output different torques according to different bolt installation conditions, and can avoid damaging bolts in the operation process.
2) The torque adjusting part in one embodiment of the invention is designed as a hysteresis torque adjuster, and specifically comprises a hysteresis loop, a magnetic torque input shaft and a magnetic torque output shaft, wherein the torque input shaft and the torque output shaft are magnetically coupled and synchronously rotate in the working state of the electric screwdriver, the adjustment of the output torque of the electric screwdriver can be realized by adjusting the included angle of the magnetic fields of the magnetic torque input shaft and the magnetic torque output shaft, and constant torque is output.
Drawings
Fig. 1 is a structural view of an electric screwdriver according to the present invention;
FIG. 2 is an interior view of a power screwdriver of the present invention;
fig. 3 is a structural view of a hysteresis moment adjuster of an electric screwdriver according to the present invention;
fig. 4 is a sectional view of a hysteresis torque adjuster of an electric screwdriver according to the present invention.
Description of reference numerals:
0: a housing; 1: a motor; 2: a first cylindrical pin; 3: a driving gear; 4: a driven gear; 5: a first bearing; 6: a second cylindrical pin; 7: a hysteresis moment adjuster; 8: a jaw chuck; 9: a chuck; 10: a second bearing; 11: a third bearing; 12: a heat dissipation fan blade; 13: a fourth bearing; 14: a driven wheel of the idler gear; 15: a driving wheel of the idle gear; 16: a fifth bearing; 17: a pressure switch; 18: a forward and reverse rotation switch; 19: a first vent hole; 20: a second vent hole; 71: a magnetic torque output shaft; 72: a magnetic hysteresis loop; 73: a magnetic torque input shaft; 74: a second S pole permanent magnet; 75: a first N-pole permanent magnet; 76: a second N-pole permanent magnet; 77: a first S pole permanent magnet.
Detailed Description
The electric screwdriver provided by the invention is further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1 and 2, an electric screwdriver includes: a housing 0; the driving part is used for providing working power for the electric screwdriver; the force input end of the transmission part is coaxially connected with the driving end of the driving part; the torque adjusting part is used for adjusting the output torque of the electric screwdriver, and the torque input end of the torque adjusting part is coaxially connected with the force output end of the transmission part; and the execution part is arranged at the front end of the shell 0, the front end of the execution part is used for fixing the screwdriver head, and the rear end of the execution part is coaxially connected with the torque output end of the torque adjusting part.
The electric screwdriver in the embodiment can adjust the output torque of the electric screwdriver through the torque adjusting part, and can adjust and output different torques according to different bolt installation conditions, so that the bolts can be prevented from being damaged in the operation process.
The torque adjusting portion in the present embodiment will be further described below.
In one embodiment, referring to fig. 3 and 4, the torque adjusting part is a hysteresis torque adjuster 7 including: a hysteresis loop 72; a magnetic torque input shaft 73, a first end side of the magnetic torque input shaft 73 being coaxially connected with a force output end of the transmission part; and a magnetic torque output shaft 71, a first end side of the magnetic torque output shaft 71 and the rear end of the execution part are coaxially connected; a cylindrical cavity is formed in the second end side of the magnetic torque output shaft 71 along the axial direction of the magnetic torque output shaft 71, a plurality of first N-pole permanent magnets 75 and a plurality of first S-pole permanent magnets 77 are attached to the inner wall of the cylindrical cavity, and the first N-pole permanent magnets 75 and the first S-pole permanent magnets 77 are alternately attached along the circumferential direction of the inner wall of the cylindrical cavity; the second end side of the torque input shaft is arranged in the cylindrical cavity, a plurality of second N-pole permanent magnets 76 and a plurality of second S-pole permanent magnets 74 are attached to the outer wall of the second end side of the torque input shaft, and the second N-pole permanent magnets 76 and the second S-pole permanent magnets 74 are alternately attached along the circumferential direction of the torque input shaft; the magnetic hysteresis ring 72 is sleeved on the second end side of the torque input shaft; under the working state of the electric screwdriver, the torque input shaft and the torque output shaft are magnetically coupled and synchronously rotate.
It can be understood that the torque input shaft and the torque output shaft are magnetically coupled to rotate synchronously, the adjustment of the output torque of the electric screwdriver can be realized by adjusting the included angle of the magnetic fields of the magnetic torque input shaft 73 and the magnetic torque output shaft 71, and a constant torque is output. Further, the output torque can be adjusted by adjusting the relative positions of the first N-pole permanent magnet 75, the second S-pole permanent magnet 74, the first S-pole permanent magnet 77, and the second N-pole permanent magnet 76. When the first N-pole permanent magnet 75 faces the second S-pole permanent magnet 74 and the first S-pole permanent magnet 77 faces the second N-pole permanent magnet 76 (at this time, it can be considered that the magnetic coupling strength between the torque input shaft and the torque output shaft is the maximum), the torque output of the electric screwdriver is the maximum (note: in the case of the same driving force).
Of course, the torque adjusting part in the present invention may be in other forms, for example, the following forms:
the moment adjustment portion includes: a hysteresis loop 72; a magnetic torque input shaft 73, a first end side of the magnetic torque input shaft 73 being coaxially connected with a force output end of the transmission part; and a magnetic torque output shaft 71, a first end side of the magnetic torque output shaft 71 and the rear end of the execution part are coaxially connected; a cylindrical cavity is formed in the second end side of the magnetic torque input shaft 73 along the axial direction of the magnetic torque output shaft 71, a plurality of first N-pole permanent magnets 75 and a plurality of first S-pole permanent magnets 77 are attached to the inner wall of the cylindrical cavity, and the first N-pole permanent magnets 75 and the first S-pole permanent magnets 77 are alternately attached along the circumferential direction of the inner wall of the cylindrical cavity; the second end side of the torque output shaft is arranged in the cylindrical cavity, a plurality of second N-pole permanent magnets 76 and a plurality of second S-pole permanent magnets 74 are attached to the outer wall of the second end side of the torque input shaft, and the second N-pole permanent magnets 76 and the second S-pole permanent magnets 74 are alternately attached along the circumferential direction of the torque output shaft; the magnetic hysteresis ring 72 is sleeved on the second end side of the torque output shaft; under the working state of the electric screwdriver, the torque input shaft and the torque output shaft can be magnetically coupled to synchronously rotate.
The transmission portion in this embodiment will be further described below.
Referring to fig. 2, the transmission part includes: the driving gear 3 is coaxially connected with the driving end of the driving part (a first cylindrical pin 2 is also arranged at the connecting position of the driving gear 3 and the driving end of the driving part); the driving gear 15 of the idle gear is meshed with the driving gear 3; the driven gear 4 is engaged with the driven gear 14 of the idle gear, and the driven gear 4 is coaxially connected to the first end of the magnetic torque input shaft 73 (the coupling shaft between the driven gear 4 and the magnetic torque input shaft 73 is provided with the first bearing 5, the second cylindrical pin 6, and the third bearing 11). Two ends of a rotating shaft of the idle gear are respectively arranged on the fourth bearing 13 and the fifth bearing 16 in a penetrating way. Under the working state of the electric screwdriver, the driving part drives the driving gear 3 to rotate, the driving gear 3 and the driving gear 15 of the idle gear are meshed to rotate so as to drive the driven gear 14 of the idle gear to rotate, the driven gear 4 and the driven gear 14 of the idle gear are meshed to rotate, the magnetic torque input shaft 73 and the driven gear 4 coaxially rotate, and transmission in the driving process is completed.
Further, a coupling shaft of the driven gear 4 and the magnetic torque input shaft 73 is provided with a heat radiation fan blade 12, and the heat radiation fan blade 12 rotates along with the coupling shaft to generate heat radiation air blowing to the transmission part. The heat dissipation air can dissipate heat of each transmission element of the transmission part.
The driving section in this embodiment will be further described below.
The driving part comprises a direct current motor 1 and a forward and reverse rotation switch 18 for controlling the forward and reverse rotation of the direct current motor 1, the direct current motor 1 is arranged in the inner cavity of the shell 0, and the switching part of the forward and reverse rotation switch 18 is arranged on the shell of the shell 0.
Further, the driving portion includes a pressure switch 17 that also controls the rotation speed of the dc motor 1, and a pressing portion of the pressure switch 17 is provided on the outer shell of the housing 0.
Further, the housing of the housing 0 is provided with a vent hole, including a first vent hole 19 and a second vent hole 20, and the two vent holes are preferably opened at the front and rear portions of the housing 0, so that air can penetrate through the entire housing 0, and the heat dissipation effect is better.
The operation of the electric screwdriver of the present invention will be further described.
The electric screwdriver transmits the driving force or the driving torque of the driving end to the torque adjusting part in a gear transmission mode, the torque adjusting part can adjust the output torque and can output constant torque, and workers can enable the torque adjusting part to output adaptive torque according to different working requirements.
The torque input shaft and the torque output shaft are magnetically coupled to rotate synchronously, the magnetic coupling force of the torque input shaft and the torque output shaft is adjustable, when the magnetic coupling force is large, the output torque of the electric screwdriver is large, and when the magnetic coupling force is small, the output torque of the electric screwdriver is small. Specifically, the magnetic coupling ends of the torque input shaft and the torque output shaft adjust the magnetic coupling force by adjusting the included angle of the coupling magnetic field, and the included angle of the coupling magnetic field can be adjusted by adjusting the relative positions of the first N-pole permanent magnet 75, the second S-pole permanent magnet 74, the first S-pole permanent magnet 77 and the second N-pole permanent magnet 76. When the first N-pole permanent magnet 75 faces the second S-pole permanent magnet 74 and the first S-pole permanent magnet 77 faces the second N-pole permanent magnet 76 (at this time, it can be considered that the magnetic coupling strength between the torque input shaft and the torque output shaft is the greatest), the torque output of the electric screwdriver is the greatest.
The operation of the electric screwdriver of the present invention will be further described.
Firstly, a proper screwdriver bit is selected and fixed at the front end of an execution part, the execution part can be a combination of a chuck 9 and a jaw chuck 8, for example, the rear end of the chuck 9 is coaxially connected with the torque output end of the torque adjusting part (specifically, a second bearing 10 is also connected), and the front end of the jaw chuck 8 is used for fixing the screwdriver bit. Before the electric screwdriver is started, a user can adjust the magnetic field included angle of the magnetic coupling ends of the magnetic torque output shaft 71 and the magnetic torque input shaft 73 through the rotary chuck 9 so that the electric screwdriver can output proper torque, of course, the user can also stop the rotation of the electric screwdriver through the pressure switch 17 in the operation process, and the rotary chuck 9 is rotated again to adjust the magnetic field included angle of the magnetic coupling ends of the magnetic torque output shaft 71 and the magnetic torque input shaft 73 so that the electric screwdriver can output proper torque; the tightening operation or loosening operation of the bolt by the electric screwdriver can be switched using the forward/reverse switch 18.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (7)
1. An electric screwdriver, comprising:
a housing;
the driving part is used for providing working power for the electric screwdriver;
the force input end of the transmission part is coaxially connected with the driving end of the driving part;
the torque adjusting part is used for adjusting the output torque of the electric screwdriver, and the torque input end of the torque adjusting part is coaxially connected with the force output end of the transmission part; and
the execution part is installed at the front end of the shell, the front end of the execution part is used for fixing a screwdriver head, and the rear end of the execution part is coaxially connected with the torque output end of the torque adjusting part.
2. The electric screwdriver according to claim 1, wherein said torque adjusting part is a hysteresis torque adjuster, comprising:
a magnetic hysteresis loop;
a magnetic torque input shaft, a first end side of which is coaxially connected with a force output end of the transmission part; and
a magnetic torque output shaft, a first end side of the magnetic torque output shaft and a rear end of the execution part are coaxially connected;
wherein,
a cylindrical cavity is formed in the second end side of the magnetic torque output shaft along the axial direction of the magnetic torque output shaft, a plurality of first N-pole permanent magnets and a plurality of first S-pole permanent magnets are attached to the inner wall of the cylindrical cavity, and the first N-pole permanent magnets and the first S-pole permanent magnets are alternately attached to the inner wall of the cylindrical cavity along the circumferential direction of the inner wall of the cylindrical cavity;
the second end side of the torque input shaft is arranged in the cylindrical cavity, a plurality of second N-pole permanent magnets and a plurality of second S-pole permanent magnets are attached to the outer wall of the second end side of the torque input shaft, and the second N-pole permanent magnets and the second S-pole permanent magnets are alternately attached along the circumferential direction of the torque input shaft;
the magnetic hysteresis loop is sleeved on the second end side of the torque input shaft;
and under the working state of the electric screwdriver, the torque input shaft and the torque output shaft are magnetically coupled and synchronously rotate.
3. The electric screwdriver as claimed in claim 2, wherein said transmission part comprises:
the driving gear is coaxially connected with the driving end of the driving part;
the driving gear of the idle gear is meshed with the driving gear;
and the driven gear is meshed with the driven wheel of the idle gear and is coaxially connected with the first end side of the magnetic torque input shaft.
4. The electric screwdriver as claimed in claim 3, wherein a coupling shaft of the driven gear and the magnetic torque input shaft is provided with heat dissipating blades, and the heat dissipating blades rotate along with the coupling shaft to generate heat dissipating wind blowing toward the transmission part.
5. The electric screwdriver as defined in claim 3, wherein said driving portion comprises a dc motor and a forward/reverse switch for controlling forward/reverse rotation of said dc motor, said dc motor is disposed in said inner cavity of said casing, and a switching portion of said forward/reverse switch is disposed on said outer shell of said casing.
6. The electric screwdriver according to claim 5, wherein said driving part comprises a pressure switch for further controlling a rotation speed of said dc motor, and a pressing part of said pressure switch is provided on a housing of said casing.
7. The electric screwdriver as claimed in any one of claims 1 to 6, wherein the housing of the casing is provided with a vent hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811353269.2A CN109249338A (en) | 2018-11-14 | 2018-11-14 | A kind of electric screw driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811353269.2A CN109249338A (en) | 2018-11-14 | 2018-11-14 | A kind of electric screw driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109249338A true CN109249338A (en) | 2019-01-22 |
Family
ID=65043620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811353269.2A Pending CN109249338A (en) | 2018-11-14 | 2018-11-14 | A kind of electric screw driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109249338A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695903A (en) * | 2019-10-16 | 2020-01-17 | 五邑大学 | Electric screwdriver with multiple rotary joints |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4236428A1 (en) * | 1991-10-30 | 1993-05-06 | Dana Corp., Toledo, Ohio, Us | Magnetically actuated torque limiting coupling - has driving cylinder between cylinders with inner and outer rings of magnets permitting relative rotation for torque adjustment |
| CN1796054A (en) * | 2004-12-28 | 2006-07-05 | 日立工机株式会社 | Pulse torque generator and power tool having the same |
| CN201482992U (en) * | 2009-03-02 | 2010-05-26 | 宋树建 | Full-automatic electric screw driver |
| CN106584342A (en) * | 2017-02-06 | 2017-04-26 | 苏州全丰精密机械有限公司 | Magnetic coupling electric screwdriver |
| US20170120428A1 (en) * | 2015-11-02 | 2017-05-04 | Compass Corporation | Screwdriver bit device with a magnetic structure |
-
2018
- 2018-11-14 CN CN201811353269.2A patent/CN109249338A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4236428A1 (en) * | 1991-10-30 | 1993-05-06 | Dana Corp., Toledo, Ohio, Us | Magnetically actuated torque limiting coupling - has driving cylinder between cylinders with inner and outer rings of magnets permitting relative rotation for torque adjustment |
| CN1796054A (en) * | 2004-12-28 | 2006-07-05 | 日立工机株式会社 | Pulse torque generator and power tool having the same |
| CN201482992U (en) * | 2009-03-02 | 2010-05-26 | 宋树建 | Full-automatic electric screw driver |
| US20170120428A1 (en) * | 2015-11-02 | 2017-05-04 | Compass Corporation | Screwdriver bit device with a magnetic structure |
| CN106584342A (en) * | 2017-02-06 | 2017-04-26 | 苏州全丰精密机械有限公司 | Magnetic coupling electric screwdriver |
Non-Patent Citations (1)
| Title |
|---|
| 周百令: "《动力调谐陀螺仪设计与制造》", 31 May 2002, 东南大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695903A (en) * | 2019-10-16 | 2020-01-17 | 五邑大学 | Electric screwdriver with multiple rotary joints |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190122 |
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| RJ01 | Rejection of invention patent application after publication |