CN206602647U - Electronic equipment - Google Patents
Electronic equipment Download PDFInfo
- Publication number
- CN206602647U CN206602647U CN201720199165.5U CN201720199165U CN206602647U CN 206602647 U CN206602647 U CN 206602647U CN 201720199165 U CN201720199165 U CN 201720199165U CN 206602647 U CN206602647 U CN 206602647U
- Authority
- CN
- China
- Prior art keywords
- vibrating motor
- electronic equipment
- magnet steel
- vibration
- coil
- 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
Links
Classifications
-
- 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
- H04R9/06—Loudspeakers
-
- 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
-
- 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
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The utility model provides a kind of electronic equipment, including framework, vibrating motor with the assembling frame to form the screen of receiving space and be contained in the receiving space and be fixedly connected with the framework, the vibrating motor is used to drive the frame vibration and drives the screen vibration sounding, the vibrating motor includes housing, it is contained in oscillator and stator in the housing, and the oscillator is suspended in the elastic component in the housing, one of them of the oscillator and stator include magnetic circuit system, another includes coil, the direction of vibration of the vibrating motor is perpendicular to plane where the screen.The vibrating motor of electronic equipment of the present utility model is fixed on framework, and the vibrating motor vibrates and drives the frame vibration, and then drives screen vibration sounding, is easy to control output audio, and sounding performance is good.
Description
【Technical field】
The utility model is related to mobile electronic device field, more particularly to a kind of electronic equipment.
【Background technology】
With the arrival in mobile Internet epoch, the quantity of Intelligent mobile equipment constantly rises.And in numerous mobile devices
In, undoubtedly most common, the most portable mobile device of mobile phone.At present, the function of mobile phone is extremely various, and one of them is high product
The call of matter and music playback function, and the microphone device in mobile phone is to realize the call of this high-quality and music playback function
One of necessary requirement.
In correlation technique, the screen sounder of mobile phone generally makes vibrating motor directly drive screen by input audio signal
Vibration sounding, the tonequality of this kind of type of drive output is poor, and the driving force of vibrating motor is smaller so as to influence sounding performance.
Therefore, it is necessary to provide a kind of new electronic equipment to solve the above problems.
【Utility model content】
The purpose of this utility model is to provide the electronic equipment that a kind of space availability ratio is high, sounding performance is good.
The technical solution of the utility model is as follows：A kind of electronic equipment, including framework and the assembling frame are provided with shape
It is described to shake into the screen and the vibrating motor that is contained in the receiving space and is fixedly connected with the framework of receiving space
Dynamic motor is used to drive the frame vibration and drives the screen vibration sounding, and the vibrating motor includes housing, is contained in
Oscillator and stator in the housing and the oscillator is suspended in the elastic component in the housing, the oscillator and stator
One of them include magnetic circuit system, another include coil, the magnetic circuit system includes connector and being embedded at the connection
Main magnet steel in part, the coil is fixed on the housing and set with the main magnet steel relative spacing, the number of the elastic component
Amount at least two and the opposite end for being located at the connector respectively；Wherein, the direction of vibration of the vibrating motor perpendicular to
Plane where the screen, and the vibrating motor satisfies the following conditional expression：
BL/R≥0.026
Wherein, B is the equivalent magnetic induction intensity of magnetic circuit system, and L is the total length of coil, and R is the D.C. resistance of coil.
It is preferred that, the framework include bonnet, enclose located at the bonnet the week side of boss frame and be contained in and described house empty
Center that is interior and being fixed on the frame.
It is preferred that, the vibrating motor is fixed on the center and positioned between the center and the bonnet or positioned at institute
State between screen and the center.
It is preferred that, the vibrating motor is fixed on the bonnet and positioned between the bonnet and the center.
It is preferred that, the magnetic circuit system is suspended in the housing；The connector, which has, to be mutually perpendicular to and perpendicular to institute
State the first direction and second direction of direction of vibration；The magnetic circuit system also includes being embedded at the connector and along described first
Direction is arranged at intervals at the first secondary magnet steel of the opposite sides of the main magnet steel；Each first secondary magnet steel respectively with the master
The first magnetic gap is formed between magnet steel, the coil at least partly falls between first magnetic along the projection on the direction of vibration
In gap.
It is preferred that, the magnetic circuit system also includes being embedded at the connector and being arranged at intervals at institute along the second direction
The second secondary magnet steel of the opposite sides of main magnet steel is stated, every one second secondary magnet steel is formed between the second magnetic between the main magnet steel respectively
Gap.
It is preferred that, the coil at least partly falls in second magnetic gap along the projection on the direction of vibration.
It is preferred that, the quantity of the coil is for two and respectively positioned at vibration side of the connector along the vibrating motor
To opposite sides.
It is preferred that, the coil is in flat.
It is preferred that, first connecting portion that the elastic component includes being fixedly connected with the connector, fix with the housing
The second connecting portion of connection and the elastic portion for connecting the first connecting portion and the second connecting portion.
The beneficial effects of the utility model are：The electronic equipment that the utility model is provided is by the way that the vibrating motor is pacified
Loaded in the framework, the vibrating motor is produced vibration by input audio signal and drive the frame vibration, and then
The framework directly drives the screen vibration sounding, instead of conventional art and directly drives screen sounding using vibrating motor,
It is easy to control output audio；Meanwhile, the vibratory drive power of the vibrating motor is big, and sounding performance is more preferable.
【Brief description of the drawings】
Fig. 1 is the structural representation of the utility model electronic equipment embodiment one；
Fig. 2 is the structural representation of the utility model electronic equipment embodiment two；
Fig. 3 is the stereochemical structure exploded view of vibrating motor in the utility model electronic equipment；
Fig. 4 is the sectional view of vibrating motor in the utility model electronic equipment.
【Embodiment】
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is refer to, is the structural representation of the utility model electronic equipment embodiment one.The electronic equipment 200 is wrapped
The framework 1 with receiving space is included, assembles in the screen 2 in the framework 1 and is fixed on the framework 1 and for driving institute
State the vibrating motor 6 of the vibration of framework 1.The place plane of direction of vibration normal to screen 2 of the vibrating motor 6.
The framework 1 include bonnet 11, enclose located at the week side of boss of bonnet 11 frame 12 and be contained in and described house empty
Center 13 that is interior and being fixed on the frame 12.In present embodiment, the center 13 is integrally formed with the frame 12 and set
Put.Certainly, the center 13 can also be set with the frame 12 for split.
The electronic equipment 200 also includes being fixed on the frame 12 and is covered in the glass panel 22 of the screen 2.
In present embodiment, the vibrating motor 6 is fixed on the center 13 and positioned at the center 13 and the bonnet
Between 11.Certainly, the vibrating motor 6 can also be fixed on the center 13 and positioned at the screen 2 and the center 13 it
Between.
During 6 input audio signal of vibrating motor, the vibrating motor 6, which is produced, to be vibrated and drives the framework 1 to vibrate,
And then the framework 1 drives the vibration sounding of screen 2.
Wherein, to make the sounding better performances of electronic equipment 200, the vibrating motor 6 is satisfied the following conditional expression：
BL/R≥0.026
Wherein, B is the equivalent magnetic induction intensity of magnetic circuit system, and L is the total length of coil, and R is the D.C. resistance of coil.
Fig. 2 is refer to, is the structural representation of the utility model electronic equipment embodiment two.The framework of the present embodiment
1 include bonnet 11, enclose located at the week side of boss of bonnet 11 frame 12 and be contained in the receiving space and be fixed on described
The center 13 of frame 12.In present embodiment, the bonnet 11 is integrally formed setting with the frame 12.The vibrating motor 6
It is fixed on the bonnet 11 and positioned between the bonnet 11 and the center 13.
Incorporated by reference to the stereochemical structure exploded view that reference picture 3 and Fig. 4, Fig. 3 are vibrating motor in the utility model electronic equipment；
Fig. 4 is the sectional view of vibrating motor in the utility model electronic equipment.The vibrating motor 6 include housing 61, be contained in it is described
Oscillator (non-label) in housing 61, the coil 63 of the driving oscillator vibration and the oscillator is suspended in the housing 61
Elastic component 64.
The housing 61 includes casing 611 and is covered on the cover plate 612 of the casing 611.
One of them of the oscillator and stator include magnetic circuit system, another include coil.For purposes of illustration only, this implementation
In example, the oscillator is made up of magnetic circuit system 62, and the stator includes the coil 63, the coil 63 and the magnetic circuit system
62 interactions are so as to drive the oscillator vibration.The vibrating motor 6 also includes the flexible electrical electrically connected with the coil 63
Road plate 65.
The magnetic circuit system 62 includes connector 621, and is embedded at the main magnet steel 622 of the connector 621.The connection
Part 321 has perpendicular to direction of vibration and the first direction X and second direction Y that are mutually orthogonal to one another.In the present embodiment, the company
Fitting 321 is generally in rectangular-shape, and first direction X is the length direction of connector 321, and second direction Y is connector 321
Width.The magnetic circuit system 62 also includes being embedded at the connector 621 and being arranged at intervals at along the first direction X
First secondary magnet steel 623 of the opposite sides of the main magnet steel 622, and it is embedded at the connector 621 and along the second party
The second secondary magnet steel 624 of the opposite sides of the main magnet steel 622 is arranged at intervals to Y.Described first secondary magnet steel 623 and the master
Formed and formed between the first magnetic gap, and the described second secondary magnet steel 624 and the main magnet steel 622 between the second magnetic between magnet steel 622
Gap.The coil 63 at least partly falls in first magnetic gap and/or the second magnetic gap along the projection on direction of vibration, by
This can make most of magnetic line of force through coil 63 in the horizontal direction (parallel to the direction of the place plane of screen 2), so as to make
Obtaining the coil 63 can be vertically of reciprocating vibration.The arrangement of the coil and magnetic circuit system is simple, and the space in vibrating motor
Utilization rate is higher.
The magnetizing direction of the main magnet steel 622 and two the described first secondary magnet steel 623 and two the described second secondary magnet steel
624 vertically (direction where normal to screen 2, i.e. direction of vibration) magnetizes；The magnetizing direction of the main magnet steel 622
Magnetizing direction with two the described first secondary magnet steel 623 is on the contrary, and the magnetizing direction of the main magnet steel 622 and two described second
The magnetizing direction of secondary magnet steel 624 is equally opposite, i.e. the side of magnetizing of the magnetizing direction of the first secondary magnet steel 623 and the second secondary magnet steel 624
To identical.Further, the coil 63 is in flat.The coil 63 be fixed on the housing 61 and with the main magnet steel
622 relative spacings are set.In present embodiment, the quantity of the coil 63 is for two and respectively positioned at the edge of connector 621
The opposite sides of the direction of vibration of the vibrating motor 6.Certainly, the quantity of the coil 63 can also be one.
The elastic component 64 includes the first connecting portion 641 being fixedly connected with the magnetic circuit system 62 and the housing 61
The second connecting portion 642 and the elastic portion of the connection first connecting portion 641 and the second connecting portion 642 being fixedly connected
643。
The quantity of the elastic component 64 is at least two and is located at the connector 621 along the second direction Y respectively
In opposite sides, present embodiment, the quantity of the elastic component 64 is two, and the first connecting portion 641 and the connection
Part 621 is fixedly connected, and the second connecting portion 642 is fixedly connected with the casing 611.It is above-mentioned that provide is that magnetic circuit system includes
The embodiment of one main magnet steel, two first secondary magnet steel and two second secondary magnet steel.However, according to it is of the present utility model other
Embodiment, the magnetic circuit system of the vibrating motor can also only include a main magnet steel, and two first secondary magnet steel or two
Second secondary magnet steel.Certainly, in a further embodiment, the magnetic circuit system of the vibrating motor can also only include a main magnetic
Steel, as long as the vibrating motor meets above-mentioned conditional.
Compared with correlation technique, electronic equipment of the present utility model by the vibrating motor by being installed on the framework
It is interior, the vibrating motor is produced vibration by input audio signal and drive the frame vibration, and then the framework is direct
The screen vibration sounding is driven, conventional art is instead of and screen sounding is directly driven using vibrating motor；Meanwhile, the vibration
The product of the equivalent magnetic induction density B of the magnetic circuit system of motor and the coil total length L and the DC resistance R of the coil
The ratio between be not less than 0.026, make that the vibratory drive power of the vibrating motor is big, sounding performance is more preferable.
Above-described is only embodiment of the present utility model, it should be noted here that for the ordinary skill of this area
For personnel, on the premise of the utility model creation design is not departed from, improvement can also be made, but these belong to this practicality
New protection domain.
Claims (10)
1. a kind of electronic equipment, it is characterised in that including framework, with the assembling frame with formed receiving space screen and
The vibrating motor being fixedly connected in the receiving space and with the framework is contained in, the vibrating motor is used to drive the frame
Frame vibrates and drives the screen vibration sounding, and the vibrating motor includes housing, the oscillator being contained in the housing and determined
Son and the oscillator is suspended in the elastic component in the housing, one of them of the oscillator and stator include magnetic circuit system
Unite, another includes coil, the magnetic circuit system includes connector and the main magnet steel being embedded in the connector, the coil
It is fixed on the housing and is set with the main magnet steel relative spacing, the quantity at least two of the elastic component and is located at respectively
The opposite end of the connector；Wherein, the direction of vibration of vibrating motor plane where the screen, and described
Vibrating motor is satisfied the following conditional expression：
BL/R≥0.026
Wherein, B is the equivalent magnetic induction intensity of magnetic circuit system, and L is the total length of coil, and R is the D.C. resistance of coil.
2. electronic equipment according to claim 1, it is characterised in that the framework includes bonnet, enclosed located at the bonnet
The frame of the week side of boss and the center for being contained in the receiving space and being fixed on the frame.
3. electronic equipment according to claim 2, it is characterised in that the vibrating motor is fixed on the center and is located at
Between the center and the bonnet or between the screen and the center.
4. electronic equipment according to claim 2, it is characterised in that the vibrating motor is fixed on the bonnet and is located at
Between the bonnet and the center.
5. electronic equipment according to claim 1, it is characterised in that the magnetic circuit system is suspended in the housing；Institute
State connector have be mutually perpendicular to and perpendicular to the first direction and second direction of the direction of vibration；The magnetic circuit system is also wrapped
Include the first secondary magnet steel of the opposite sides for being embedded at the connector and the main magnet steel being arranged at intervals at along the first direction；
Each described first secondary magnet steel forms the first magnetic gap between the main magnet steel respectively, and the coil is along along the direction of vibration
Projection at least partly fall in first magnetic gap.
6. electronic equipment according to claim 5, it is characterised in that the magnetic circuit system also includes being embedded at the connection
Part and be arranged at intervals at along the second direction the main magnet steel opposite sides the second secondary magnet steel, every one second secondary magnet steel point
The second magnetic gap is not formed between the main magnet steel.
7. electronic equipment according to claim 6, it is characterised in that the coil along the projection on the direction of vibration extremely
Small part falls in second magnetic gap.
8. electronic equipment according to claim 1, it is characterised in that the quantity of the coil is for two and respectively positioned at institute
State the opposite sides of direction of vibration of the connector along the vibrating motor.
9. electronic equipment according to claim 8, it is characterised in that the coil is in flat.
10. electronic equipment according to claim 6, it is characterised in that the elastic component includes fixing with the connector
The first connecting portion of connection, the second connecting portion being fixedly connected with the housing and it is connected the first connecting portion and described
The elastic portion of two connecting portions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720091607 | 2017-01-22 | ||
| CN2017200916074 | 2017-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206602647U true CN206602647U (en) | 2017-10-31 |
Family
ID=59328340
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710122027.1A Expired - Fee Related CN106954147B (en) | 2017-01-22 | 2017-03-02 | Electronic device |
| CN201710122028.6A Pending CN106973346A (en) | 2017-01-22 | 2017-03-02 | Electronic equipment |
| CN201720199164.0U Expired - Fee Related CN206602646U (en) | 2017-01-22 | 2017-03-02 | Electronic equipment |
| CN201720199165.5U Expired - Fee Related CN206602647U (en) | 2017-01-22 | 2017-03-02 | Electronic equipment |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710122027.1A Expired - Fee Related CN106954147B (en) | 2017-01-22 | 2017-03-02 | Electronic device |
| CN201710122028.6A Pending CN106973346A (en) | 2017-01-22 | 2017-03-02 | Electronic equipment |
| CN201720199164.0U Expired - Fee Related CN206602646U (en) | 2017-01-22 | 2017-03-02 | Electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN106954147B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112954090A (en) * | 2019-12-10 | 2021-06-11 | Oppo广东移动通信有限公司 | Screen sound producing apparatus |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108156562A (en) * | 2017-12-28 | 2018-06-12 | 上海传英信息技术有限公司 | A kind of display screen sound-producing device and intelligent terminal |
| CN108319364B (en) * | 2018-01-12 | 2021-05-14 | 瑞声科技(新加坡)有限公司 | Electronic device with tactile feedback vibrator |
| CN108334165B (en) * | 2018-01-19 | 2022-01-14 | 瑞声科技(新加坡)有限公司 | Electronic device |
| CN110177321B (en) * | 2018-02-21 | 2021-07-23 | 易音特电子株式会社 | Hybrid actuator and multimedia device having the same |
| CN108566464B (en) * | 2018-04-28 | 2022-05-10 | 维沃移动通信有限公司 | Mobile terminal |
| CN109165002B (en) * | 2018-07-09 | 2022-01-11 | Oppo广东移动通信有限公司 | Screen sounding method, device, electronic device and storage medium |
| CN109068244B (en) * | 2018-07-17 | 2020-03-17 | 歌尔股份有限公司 | Electromagnetic exciter and screen sounding device |
| CN208821081U (en) * | 2018-10-16 | 2019-05-03 | 歌尔科技有限公司 | Electromagnetic driver and screen sounding device |
| CN110572749B (en) * | 2018-11-16 | 2021-03-23 | 华为技术有限公司 | Mobile terminal |
| US11929775B2 (en) | 2018-11-16 | 2024-03-12 | Huawei Technologies Co., Ltd. | Mobile terminal |
| CN109495832B (en) * | 2018-11-27 | 2020-08-25 | 歌尔股份有限公司 | Surface sound generating device and electronic equipment |
| CN109842701B (en) * | 2018-12-24 | 2023-11-17 | 歌尔股份有限公司 | Screen vibration sounding device and electronic product |
| CN111385691A (en) * | 2018-12-29 | 2020-07-07 | 歌尔股份有限公司 | Electronic equipment |
| CN109511063B (en) * | 2018-12-31 | 2021-01-12 | 瑞声科技（南京）有限公司 | Electronic equipment |
| CN109862493B (en) * | 2019-01-18 | 2023-12-08 | 东莞顺合丰电业有限公司 | Vibrating element |
| CN110166907B (en) * | 2019-05-15 | 2021-02-12 | 瑞声光电科技(常州)有限公司 | Sound producing device |
| CN110166904B (en) * | 2019-06-12 | 2020-08-18 | 瑞声科技（南京）有限公司 | Screen sounding device |
| WO2021000208A1 (en) * | 2019-07-01 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Sound-generating component and electronic device |
| CN110856084A (en) * | 2019-11-27 | 2020-02-28 | 浙江省东阳市东磁诚基电子有限公司 | Novel under-screen sound generator and implementation method thereof |
| CN112289180B (en) * | 2020-10-19 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
| CN116581924A (en) * | 2021-12-06 | 2023-08-11 | 荣耀终端有限公司 | Vibration motor and terminal device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100370640B1 (en) * | 2000-11-20 | 2003-02-05 | 삼성전기주식회사 | Vibration speaker |
| JP3762400B2 (en) * | 2003-09-01 | 2006-04-05 | 株式会社ジャムコ | Flat panel speaker |
| KR100878249B1 (en) * | 2008-05-01 | 2009-01-12 | 주식회사 예일전자 | Sensory signal output apparatus |
| CN201629840U (en) * | 2010-02-25 | 2010-11-10 | 厦门冠音泰科技有限公司 | Structure of oscillation sounder |
| CN203289642U (en) * | 2013-05-07 | 2013-11-13 | 瑞声科技（南京）有限公司 | Screen sounding device |
| CN205490073U (en) * | 2016-01-04 | 2016-08-17 | 瑞声光电科技(常州)有限公司 | Vibration motor |
| CN205847543U (en) * | 2016-06-23 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | Vibration-sound generating device |
| CN205847596U (en) * | 2016-06-23 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | Vibration-sound generating device |
| CN106208599B (en) * | 2016-07-21 | 2018-09-21 | 瑞声科技(新加坡)有限公司 | Linear vibration electric motor |
-
2017
- 2017-03-02 CN CN201710122027.1A patent/CN106954147B/en not_active Expired - Fee Related
- 2017-03-02 CN CN201710122028.6A patent/CN106973346A/en active Pending
- 2017-03-02 CN CN201720199164.0U patent/CN206602646U/en not_active Expired - Fee Related
- 2017-03-02 CN CN201720199165.5U patent/CN206602647U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112954090A (en) * | 2019-12-10 | 2021-06-11 | Oppo广东移动通信有限公司 | Screen sound producing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106973346A (en) | 2017-07-21 |
| CN106954147B (en) | 2020-12-22 |
| CN106954147A (en) | 2017-07-14 |
| CN206602646U (en) | 2017-10-31 |
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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: 20171031 Termination date: 20210302 |