CN109547898A - Microphone device - Google Patents
Microphone device Download PDFInfo
- Publication number
- CN109547898A CN109547898A CN201811162947.7A CN201811162947A CN109547898A CN 109547898 A CN109547898 A CN 109547898A CN 201811162947 A CN201811162947 A CN 201811162947A CN 109547898 A CN109547898 A CN 109547898A
- Authority
- CN
- China
- Prior art keywords
- frame
- fixed
- vibrating diaphragm
- wall
- microphone device
- 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
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The present invention discloses a kind of microphone device comprising frame, vibrational system, magnetic circuit system and resilient support assemblies；Vibrational system includes the voice coil for being fixed on the vibrating diaphragm and driving diaphragm oscillations sounding of frame；Magnetic circuit system includes the magnetic bowl for being fixed on frame and the magnet steel being contained in magnetic bowl, magnetic bowl includes bottom wall, the side wall extended from the bottom wall periphery and connection wall from the bottom wall to the frame that extend from, the connection wall is fixed on one end far from the vibrating diaphragm of the frame, the magnetic circuit system is supported in the frame, and the connection wall and the resilient support assemblies are along direction of vibration interval；One end far from the vibrating diaphragm of the frame is fixed in described resilient support assemblies one end, and the other end is fixed on the vibrational system, and the resilient support assemblies are arranged around the side wall and are spaced apart from each other with the side wall.Compared with the relevant technologies, microphone device good reliability of the invention and acoustical behavior is excellent.
Description
[technical field]
The present invention relates to electroacoustic conversion art more particularly to a kind of microphone devices for applying to portable electronic product.
[background technique]
With the arrival of mobile internet era, the quantity of Intelligent mobile equipment constantly rises.And in numerous mobile devices
Among, mobile phone is undoubtedly most common, most portable mobile terminal device.Currently, the function of mobile phone is extremely various, one of them is just
It is the music function of high-quality, therefore, the microphone device for playing sound is widely applied Intelligent mobile equipment till now
Among.
The microphone device of the relevant technologies include frame and the vibrational system for being individually fixed in the frame and have magnetic
The magnetic circuit system in gap；The vibrational system includes the vibrating diaphragm for being fixed on the frame, is fixed on the vibrating diaphragm and is inserted in institute
It states magnetic gap and the frame is fixed on the voice coil for driving the diaphragm oscillations sounding and one end, the other end is fixed on the sound
Enclose the resilient support assemblies far from described vibrating diaphragm one end.
However, the vibrating diaphragm and the resilient support assemblies are individually fixed in institute in microphone device described in the relevant technologies
The opposite end of voice coil is stated, although the horizontal swing when resilient support assemblies can effectively prevent the voice coil vibrations, its
The structure directly connecting with voice coil causes the design of the voice coil to be restricted, and the volume of the magnetic circuit system is also limited, from
And it is limited that the acoustics of the microphone device is improved.
Therefore, it is really necessary to provide a kind of new microphone device solution above-mentioned technical problem.
[summary of the invention]
The purpose of the present invention is overcoming above-mentioned technical problem, a kind of good reliability and the good acoustical generator of acoustical behavior are provided
Part.
To achieve the goals above, the present invention provides a kind of microphone device comprising frame is individually fixed in the frame
Vibrational system and magnetic circuit system and resilient support assemblies；The vibrational system includes being fixed on vibrating diaphragm and the drive of the frame
Move the voice coil of the diaphragm oscillations sounding；The magnetic circuit system includes being fixed on the magnetic bowl of the frame and being contained in the magnetic bowl
Interior magnet steel, the magnetic bowl include bottom wall, from the bottom wall periphery to the vibrational system direction bending extend side wall and
The connection wall extended from the bottom wall to the frame, the magnet steel is fixed on the bottom wall, between the magnet steel and the side wall
Every forming magnetic gap, the voice coil is inserted in the magnetic gap, and the connection wall is fixed on the separate vibrating diaphragm of the frame
One end, the magnetic circuit system is supported in the frame, and the connection wall and the resilient support assemblies are along vibrating
Direction interval；One end far from the vibrating diaphragm of the frame is fixed in described resilient support assemblies one end, and the other end is fixed
In the vibrational system, and the resilient support assemblies are arranged around the side wall and are spaced apart from each other with the side wall.
Preferably, separate described vibrating diaphragm one end of the frame protrudes to form fixing lug boss, and the connection wall is fixed on institute
State fixing lug boss.
Preferably, the resilient support assemblies include being fixed on annular in shape elasticity of the frame far from described vibrating diaphragm one end
Part, the auxiliary vibrating diaphragm and skeleton annular in shape far from the frame side for being attached at the elastic component, described skeleton one end
It is connected to the elastic component, the other end is connected to the vibrating diaphragm.
Preferably, the framework ring is arranged around the side wall and is spaced apart from each other with the side wall.
Preferably, the elastic component include the first fixed arm that is annular in shape and being fixed on the frame, it is annular in shape and with institute
The elastic arm of spaced second fixed arm of the first fixation wall and connection first fixed arm and second fixed arm is stated,
The skeleton is connect with second fixation wall；The auxiliary vibrating diaphragm includes the ring of the arc-shaped structure in cross section, by the folding
The first connecting portion and second connecting portion that ring opposite sides each extends over, the first connecting portion and second connecting portion difference
It is fixed on the side far from the vibrating diaphragm of first fixed arm and second fixed arm, and makes the ring and the bullet
Arm is oppositely arranged.
Preferably, the elastic component and the auxiliary vibrating diaphragm are equipped with the recessing groove through thereon, and the fixing lug boss is worn
If the recessing groove extends.
Preferably, the elastic component is flexible circuit board.
Preferably, the connection wall includes four and is divided into the opposite sides of the bottom wall, and the fixing lug boss is set
There are four and divide equally in the opposite sides of the frame, the fixing lug boss is fixed in each connection wall extension.
Preferably, the fixing lug boss is protruded to form faceplate far from one end of the frame, the separate institute of the connection wall
The one end for stating bottom wall is recessed to form card slot, and the faceplate is fixed in the card slot.
Compared with prior art, the frame is fixed in described resilient support assemblies one end by microphone device of the invention
One end far from the vibrating diaphragm, the other end is fixed on the vibrational system, and the resilient support assemblies are around the side wall
It is arranged and is spaced apart from each other with the side wall；The magnetic bowl sets the connection wall extended from the bottom wall to the frame, the connection
Wall is fixed on one end far from the vibrating diaphragm of the frame, the magnetic circuit system is supported in the frame, and it is described
Along direction of vibration interval, above structure, the magnetic bowl is supported by the connection wall for connection wall and the resilient support assemblies
In frame, the resilient support assemblies are effectively avoided, so that the design of the magnetic circuit system is not by the resilient support group
The limitation of part effectively increases the acoustical behavior of the microphone device and reliable to realize the maximization design of magnetic circuit system
Property.
[Detailed description of the invention]
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the schematic perspective view of microphone device of the present invention；
Fig. 2 is another view stereo structural schematic diagram of microphone device of the present invention；
Fig. 3 is the stereochemical structure exploded view of microphone device of the present invention；
Fig. 4 is the cut-away view of the line A-A along Fig. 1；
Fig. 5 is magnified partial view shown in B in Fig. 4.
[specific embodiment]
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiments are merely a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Please refer to shown in Fig. 1-3, the present invention provides a kind of microphone device 100 comprising frame 1 is individually fixed in
The vibrational system 2 and magnetic circuit system 3 and resilient support assemblies 4 of the frame 1.
The vibrational system 2 includes the vibrating diaphragm 21 for being fixed on the frame 1 and the sound for driving 21 vibration sounding of vibrating diaphragm
Circle 22.
The magnetic circuit system 3 includes the magnetic bowl 31 for being fixed on the frame 1 and the magnet steel 32 being contained in the magnetic bowl 31.
What the magnetic bowl 31 extended including bottom wall 311, from 311 periphery of bottom wall to 2 direction of vibrational system bending
Side wall 312 and the connection wall 313 extended from the bottom wall 311 to the frame 1.
The magnet steel 32 is fixed on the bottom wall 311, and the magnet steel 32 forms magnetic gap 33 with the side wall 312 interval,
The voice coil 22 is inserted in the magnetic gap 33, to drive 21 vibration sounding of vibrating diaphragm.The connection wall 313 is fixed on institute
One end far from the vibrating diaphragm 21 for stating frame 1, the magnetic circuit system 3 is supported in the frame 1.
In present embodiment, specifically, the connection wall 313 includes four and is divided into the opposite of the bottom wall 311
Two sides.Certainly, the quantity of the connection wall 313 is without being limited thereto.
Please in combination with shown in Fig. 4-5, the separate vibration of the frame 1 is fixed in described 4 one end of resilient support assemblies
One end of film 21, the other end is fixed on the vibrational system 2, and the resilient support assemblies 4 are arranged around the side wall 312
And it is spaced apart from each other with the side wall 312.Meanwhile the connection wall 313 and the resilient support assemblies 4 are along direction of vibration interval,
On the one hand the structure passes through institute's connection wall 313 and the magnetic circuit system 3 is supported in the frame 1, on the other hand the connection wall
313 form evacuation with the resilient support assemblies 4, avoid and interfere, so that the design of the magnetic circuit system 3 is not by described
The limitation of resilient support assemblies 4 effectively increases the microphone device 100 to realize the maximization design of magnetic circuit system 3
Acoustical behavior and reliability.
More preferably, separate described 21 one end of vibrating diaphragm of the frame 1 protrudes to form fixing lug boss 11, the connection wall 313
It is fixed on the fixing lug boss 11.The structure makes the connection wall 313 bigger apart from the distance of the bottom end of the frame 1, i.e.,
So that the connection wall 313 is avoided the resilient support assemblies 4, improves reliability.
In present embodiment, the quantity Matching of the quantity of the fixing lug boss 11 and the connection wall 313, i.e., the described fixation
Boss 11 sets there are four and divides equally in the opposite sides of the frame 1, and each extension of connection wall 313 is fixed on described in one
Fixing lug boss 11.
The resilient support assemblies 4 include the elastic component 41 annular in shape being fixed on frame far from described vibrating diaphragm one end, patch
Set on the auxiliary vibrating diaphragm 42 and skeleton 43 annular in shape far from the frame side of the elastic component 41.
The elastic component 41 is flexible circuit board.Voice coil 22 described in present embodiment is electrically connected with the elastic component 41,
On the one hand for providing the support to the voice coil 22, external electric signal on the other hand is introduced for the voice coil 22, is avoided logical
Crossing lead is the problem of being easy broken string when the voice coil 22 introduces external electric signal, to improve its reliability.
Described 43 one end of skeleton is connected to the elastic component 41, and the other end is connected to the vibrating diaphragm 21, so that institute
It states resilient support assemblies 4 and support is formed to the vibrating diaphragm 21, to improve the vibration performance of the vibrating diaphragm 21.
It should be noted that the skeleton 43 is not limited only to be connected to the elastic component 41, also can connect in described
Vibrating diaphragm 42 is assisted, or is located in be formed between the elastic component 41 and the auxiliary vibrating diaphragm 42 and fix, this is all feasible.
Specifically, the elastic component 41 include the first fixed arm 411 that is annular in shape and being fixed on the frame 1, it is annular in shape
And with spaced second fixed arm 412 of first fixation wall and connect first fixed arm and described second fixed
The elastic arm 413 of arm, the skeleton 43 are connect with second fixation wall 412.
The auxiliary vibrating diaphragm 42 includes the ring 421 of the arc-shaped structure in cross section, by 421 opposite sides of ring difference
The first connecting portion 422 and second connecting portion 423 of extension, the first connecting portion 422 and the second connecting portion 423 are solid respectively
Due to the side far from the vibrating diaphragm 21 of first fixed arm 411 and second fixed arm 412, and make the ring
421 are oppositely arranged with the elastic arm 413.
In present embodiment, the skeleton 43 is arranged around the side wall 312 and is spaced apart from each other with the side wall 312.?
That is the skeleton 43 is located at the outside of the magnet steel 31.Certainly, the skeleton 43 can also be set to the interior of the magnet steel 31
Around the skeleton 43, this is also feasible for side, i.e. side wall ring.
In order to not interfere with the fixing lug boss 11, the elastic component 41 is equipped with the auxiliary vibrating diaphragm 42 through thereon
Recessing groove 44, when the resilient support assemblies 4 be connected to the frame 1 far from 21 side of vibrating diaphragm when, the fixation
Boss 11 wears the recessing groove 44 and extends.
Continuing with shown in ginseng Fig. 3, in order to improve the assembly efficiency, the one end of the fixing lug boss 11 far from the frame 1 is convex
Faceplate 111 is formed out, and one end far from the bottom wall 311 of the connection wall 313 is recessed to form card slot 3131, the faceplate
111 are fixed in the card slot 3131.Above structure makes the connection wall 313 form clamping, a side with the fixing lug boss 11
Face, the card slot 3131 state faceplate 111 with bundle and are equivalent to form mutual position limiting structure, improve assembly efficiency, on the other hand, the two
Contact surface is big when fixed, and fixed effect can more be stablized, better reliability.
Compared with prior art, the frame is fixed in described resilient support assemblies one end by microphone device of the invention
One end far from the vibrating diaphragm, the other end is fixed on the vibrational system, and the resilient support assemblies are around the side wall
It is arranged and is spaced apart from each other with the side wall；The magnetic bowl sets the connection wall extended from the bottom wall to the frame, the connection
Wall is fixed on one end far from the vibrating diaphragm of the frame, the magnetic circuit system is supported in the frame, and it is described
Along direction of vibration interval, above structure, the magnetic bowl is supported by the connection wall for connection wall and the resilient support assemblies
In frame, the resilient support assemblies are effectively avoided, so that the design of the magnetic circuit system is not by the resilient support group
The limitation of part effectively increases the acoustical behavior of the microphone device and reliable to realize the maximization design of magnetic circuit system
Property.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of microphone device comprising frame and the vibrational system and magnetic circuit system for being individually fixed in the frame；The vibration
Dynamic system includes the vibrating diaphragm for being fixed on the frame and the voice coil for driving the diaphragm oscillations sounding；The magnetic circuit system includes solid
Magnetic bowl due to the frame and the magnet steel that is contained in the magnetic bowl, the magnetic bowl include bottom wall and from the bottom wall periphery to
The side wall that the vibrational system direction bending extends, the magnet steel are fixed on the bottom wall, the magnet steel and the sidewall spacers
Magnetic gap is formed, the voice coil is inserted in the magnetic gap, which is characterized in that the microphone device further includes resilient support group
One end far from the vibrating diaphragm of the frame is fixed in part, described resilient support assemblies one end, and the other end is fixed on described
Vibrational system, and the resilient support assemblies are arranged around the side wall and are spaced apart from each other with the side wall；The magnetic bowl also wraps
The connection wall extended from the bottom wall to the frame is included, the connection wall is fixed on one far from the vibrating diaphragm of the frame
End, the magnetic circuit system is supported in the frame, and the connection wall and the resilient support assemblies are along direction of vibration
Interval.
2. microphone device according to claim 1, which is characterized in that the frame protrudes shape far from described vibrating diaphragm one end
At fixing lug boss, the connection wall is fixed on the fixing lug boss.
3. microphone device according to claim 2, which is characterized in that the resilient support assemblies are remote including being fixed on frame
Elastic component annular in shape from described vibrating diaphragm one end is attached at the annular in shape auxiliary far from the frame side of the elastic component
Vibrating diaphragm and skeleton are helped, described skeleton one end is connected to the elastic component, and the other end is connected to the vibrating diaphragm.
4. microphone device according to claim 3, which is characterized in that the framework ring be arranged around the side wall and with it is described
Side wall is spaced apart from each other.
5. microphone device according to claim 3, which is characterized in that the elastic component includes annular in shape and is fixed on described
First fixed arm of frame, it is annular in shape and with spaced second fixed arm of first fixation wall and connect described first
The elastic arm of fixed arm and second fixed arm, the skeleton are connect with second fixation wall；The auxiliary vibrating diaphragm includes cross
The ring of the arc-shaped structure in section, the first connecting portion and second connecting portion each extended over by the ring opposite sides, it is described
First connecting portion and the second connecting portion be individually fixed in first fixed arm and second fixed arm far from described
The side of vibrating diaphragm, and it is oppositely arranged the ring with the elastic arm.
6. microphone device according to claim 5, which is characterized in that the elastic component is equipped with the auxiliary vibrating diaphragm and passes through
Recessing groove thereon is worn, the fixing lug boss wears the recessing groove and extends.
7. microphone device according to claim 5, which is characterized in that the elastic component is flexible circuit board.
8. microphone device according to claim 2, which is characterized in that the connection wall includes four and is divided into described
The opposite sides of bottom wall, the fixing lug boss set there are four and divide equally in the opposite sides of the frame, each connection wall
The fixing lug boss is fixed in extension.
9. microphone device according to claim 2, which is characterized in that the one end of the fixing lug boss far from the frame is convex
Faceplate is formed out, and one end far from the bottom wall of the connection wall is recessed to form card slot, and the faceplate is fixed on the card slot
It is interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811162947.7A CN109547898A (en) | 2018-09-30 | 2018-09-30 | Microphone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811162947.7A CN109547898A (en) | 2018-09-30 | 2018-09-30 | Microphone device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109547898A true CN109547898A (en) | 2019-03-29 |
Family
ID=65843532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811162947.7A Pending CN109547898A (en) | 2018-09-30 | 2018-09-30 | Microphone device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109547898A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131977A (en) * | 2020-03-05 | 2020-05-08 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN111464923A (en) * | 2019-12-30 | 2020-07-28 | 瑞声科技(新加坡)有限公司 | Sound producing device |
| WO2021128330A1 (en) * | 2019-12-27 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound generation device |
| WO2022062033A1 (en) * | 2020-09-25 | 2022-03-31 | 瑞声声学科技(深圳)有限公司 | Sound emitting unit, speaker, and electronic terminal |
| WO2022110432A1 (en) * | 2020-11-30 | 2022-06-02 | 瑞声声学科技(深圳)有限公司 | Sound-producing device |
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| CN205320283U (en) * | 2016-01-08 | 2016-06-15 | 国光电器股份有限公司 | Thin speaker |
| CN108322869A (en) * | 2018-01-24 | 2018-07-24 | 瑞声科技(新加坡)有限公司 | Microphone device |
| EP3481087A1 (en) * | 2016-05-18 | 2019-05-08 | Tang Band Industries Co., Ltd. | Radiation device and dual suspension edge loudspeaker, loudspeaker box, and application thereof |
| CN208924471U (en) * | 2018-09-30 | 2019-05-31 | 瑞声科技(新加坡)有限公司 | Microphone device |
-
2018
- 2018-09-30 CN CN201811162947.7A patent/CN109547898A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205320283U (en) * | 2016-01-08 | 2016-06-15 | 国光电器股份有限公司 | Thin speaker |
| EP3481087A1 (en) * | 2016-05-18 | 2019-05-08 | Tang Band Industries Co., Ltd. | Radiation device and dual suspension edge loudspeaker, loudspeaker box, and application thereof |
| CN108322869A (en) * | 2018-01-24 | 2018-07-24 | 瑞声科技(新加坡)有限公司 | Microphone device |
| CN208924471U (en) * | 2018-09-30 | 2019-05-31 | 瑞声科技(新加坡)有限公司 | Microphone device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128330A1 (en) * | 2019-12-27 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound generation device |
| CN111464923A (en) * | 2019-12-30 | 2020-07-28 | 瑞声科技(新加坡)有限公司 | Sound producing device |
| CN111131977A (en) * | 2020-03-05 | 2020-05-08 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN111131977B (en) * | 2020-03-05 | 2021-02-26 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| WO2022062033A1 (en) * | 2020-09-25 | 2022-03-31 | 瑞声声学科技(深圳)有限公司 | Sound emitting unit, speaker, and electronic terminal |
| WO2022110432A1 (en) * | 2020-11-30 | 2022-06-02 | 瑞声声学科技(深圳)有限公司 | Sound-producing device |
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| 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 | ||
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Application publication date: 20190329 |