CN107404694A - Loudspeaker enclosure and preparation method thereof - Google Patents
Loudspeaker enclosure and preparation method thereof Download PDFInfo
- Publication number
- CN107404694A CN107404694A CN201710724936.2A CN201710724936A CN107404694A CN 107404694 A CN107404694 A CN 107404694A CN 201710724936 A CN201710724936 A CN 201710724936A CN 107404694 A CN107404694 A CN 107404694A
- Authority
- CN
- China
- Prior art keywords
- flanging
- main part
- sheet metal
- connecting portion
- loudspeaker enclosure
- 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.)
- Granted
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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
- 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
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The present invention relates to acoustic-electric field, discloses a kind of loudspeaker enclosure.In the present invention, the loudspeaker enclosure includes the first housing, second housing, and sounding monomer, the through hole of face sounding monomer is provided with first housing and with first shell body by integral forming and covers the sheet metal of the through hole, sheet metal includes horizontally disposed main part and is arranged on the fixed part at main part edge, fixed part includes the connecting portion that main body edge protrudes out in the horizontal direction, and the first flanging protruded out from side bending of the connecting portion away from main part, first flanging includes the bottom being connected with connecting portion, the simultaneously top edge away from connecting portion is oppositely arranged with bottom, connect the lateral margin of bottom and top edge, fixed part also includes the second flanging protruded out from lateral margin bending.Present invention also offers a kind of loudspeaker enclosure preparation method.Loudspeaker and loudspeaker enclosure preparation method provided by the invention, without expending even shelves material, cost is reduced, and polyester material need not be pasted and carry out seal cavity.
Description
Technical field
The present invention relates to acoustic-electric field, more particularly to a kind of loudspeaker enclosure and this kind of loudspeaker enclosure case preparation method.
Background technology
In the prior art, loudspeaker enclosure usually requires to carry out embedded injection molding, process needs pair using steel disc
Steel disc is positioned, and in conventional positioning method, a kind of mode is even shelves positioning, and company's shelves positioning needs to set on sheet metal
Even mark structure, another way are steel disc large area perforate positioning, and this mode needs the large area on injection molding steel disc to open positioning
Hole.
Inventor has found that at least there are the following problems in the prior art：Even shelves positioning mode easily expends even shelves material, so as to
Increase cost, although steel disc large area perforate positioning need not expend company's shelves material, because large area is opened calmly on steel disc
Position hole, cavity sealing can be bad, it is necessary to be sticked polyester material behind in sheet metal in addition to cover perforate with seal cavity.Cause
This, it is necessary to a kind of structure of loudspeaker is provided to solve the above problems.
The content of the invention
It is an object of the invention to provide a kind of loudspeaker enclosure so that injection molding steel disc reduces without expending even shelves material
Cost, and carry out seal cavity without the polyester material that is sticked in addition.
In order to solve the above technical problems, embodiments of the present invention provide a kind of loudspeaker enclosure, including the first housing, with
The first shell body is oppositely arranged and assembled the second housing, the sounding list being arranged in the receiving space to form receiving space
Body, through hole that monomer occurs described in face is provided with first housing and with the first shell body by integral forming and covering
The sheet metal of the through hole, the sheet metal include horizontally disposed main part and are arranged on the fixation at the main part edge
Portion, the fixed part include the connecting portion protruded out in the horizontal direction from the main part edge, and remote from the connecting portion
The first flanging for protruding out of side bending of the main part, first flanging include the bottom being connected with the connecting portion and
The bottom is oppositely arranged and the top edge away from the connecting portion, the lateral margin of the connection bottom and the top edge,
The fixed part also includes the second flanging protruded out from lateral margin bending.
Present invention also offers a kind of loudspeaker enclosure preparation method, comprise the following steps：Punching press one has the gold of main part
Belong to piece, to form fixed part at the edge of the main part, the fixed part is included from the main part edge in the horizontal direction
The connecting portion protruded out, and the first flanging for bending and protruding out from side of the connecting portion away from the main part, described
The bottom and the bottom that one flanging includes being connected with the connecting portion are oppositely arranged and the top sides away from the connecting portion
Edge, the lateral margin of the connection bottom and the top edge, the fixed part also include bending and protrude out from the lateral margin the
Two flangings；There is provided one has raised mold insert, make the sheet metal first flanging and second flanging from difference
Direction is resisted against in the projection with the fixation sheet metal；Embedded injection is carried out to the sheet metal being fixed on the mold insert
It is molded so that loudspeaker enclosure is made.
In terms of existing technologies, it sets the connecting portion at main body edge to embodiment of the present invention on sheet metal
The first flanging of extension and the second flanging from the bending extension of the first flanging are bent, so as to utilize edge in injection molding process
Part abuts against the first flanging and the second flanging to be positioned from different directions, without the company's of setting mark structure on sheet metal
Even shelves material has been saved, has reduced cost, it also avoid on sheet metal perforate without pasting polyester material on sheet metal
Perforate is covered to form seal cavity.
In addition, second flanging is vertical with first flanging.By the way that the first flanging and the second flanging are arranged into phase
Mutually vertical structure so that sheet metal and the first housing are not easy dystopy, and it is firm to ensure that sheet metal is combined with the first housing
Property.
In addition, first flanging and second flanging are vertical with the main part.By by the first flanging and
Two flangings are respectively provided with into vertical with main part, further increase the fastness between sheet metal and the first housing.
In addition, second flanging protrudes out from the lateral margin towards the main part side.
In addition, second flanging protrudes out from the lateral margin towards the side away from the main part.
In addition, second flanging extends from the one end of the lateral margin away from the connecting portion, second flanging and institute
Connecting portion is stated not abut mutually.
In addition, offer through hole on first flanging.By opening up through hole on the first flanging so that sheet metal and
Good combination can be carried out between one housing using the through hole, sheet metal is fixed more firm.
In addition, the sheet metal includes multiple fixed parts, the multiple fixed part is separately positioned on the main part
Relative both sides.By increasing multiple fixed parts for being used to fix sheet metal and the first housing, and multiple fixed parts are set respectively
In the both sides of main part, so as to add the fastness that sheet metal is combined with the first housing.
Mutually hung down in addition, there is the step of sheet metal of main part to be formed on the edge of the main part for the punching press one
Straight first flanging and second flanging.
Brief description of the drawings
Fig. 1 is the explosive view of the loudspeaker enclosure and mold insert in first embodiment of the invention；
Fig. 2 is the three-dimensional assembly diagram of the loudspeaker enclosure in first embodiment of the invention；
Fig. 3 is the partial enlarged drawing of A portions shown in Fig. 1；
Fig. 4 is the loudspeaker enclosure preparation method flow chart that second embodiment of the invention provides.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order that reader more fully understands the present invention and proposes many ins and outs.But even if without these ins and outs and base
Many variations and modification in following embodiment, each claim technical side claimed of the present invention can also be realized
Case.
The first embodiment of the present invention is related to a kind of loudspeaker enclosure 100, as shown in Figure 1, Figure 2, Figure 3 shows, loudspeaker enclosure 100
Including：First housing 11, the second housing (not shown) being oppositely arranged with the first housing 11, the first housing 11 and the second housing group
With receiving space is formed, sounding monomer is provided with receiving space.Through hole 13 is provided with first housing 11, and covers this and leads to
The sheet metal 15 in hole 13, sheet metal 15 are integrally formed with the first housing 11.Through hole 13 is used for when subsequently being assembled with sounding monomer
Face sounding monomer.Sheet metal 15 includes horizontally disposed main part 151 and is arranged on the fixed part at the edge of main part 151
152.Fixed part 152 includes the connecting portion 1521 that the edge of main body 151 protrudes out in the horizontal direction, and remote from connecting portion 1521
The first flanging 1522 that side bending from main part 151 protrudes out.First flanging 1522 includes the bottom being connected with connecting portion 1521
Portion 1522a, it is oppositely arranged with bottom 1522a and the top edge 1522b away from connecting portion 1521, be connected bottom 1522a with pushing up
Portion edge 1522b lateral margin 1522c.Fixed part 152 also includes the second flanging 1523 protruded out from lateral margin 1522c bendings.
In the present embodiment, sheet metal 15 is integrally formed with the first housing 11, in specific manufacturing process, can be provided
One has the mold insert 21 of projection 19, and the first flanging 1522 and the second flanging 1523 for making sheet metal 15 are resisted against from different directions
So that sheet metal 15 will be fixed in projection 19, embedded injection molding is carried out to the sheet metal 15 being fixed on mold insert 21 and raised with being made
Sound device case (i.e. the first housing 11).
Embodiment of the present invention in terms of existing technologies, using the fixed part 152 on sheet metal 15 come positioning metal
Piece 15, it is the first flanging of the bending extension of connecting portion 1521 that the edge of main body 151 is set on sheet metal 15 specifically
1522 and from the first flanging 1522 bending extension the second flanging 1523, so as in injection molding process utilize mold insert 21 from
Different directions abuts against the first flanging 1522 and the second flanging 1523 to be positioned so that sheet metal 15 is less likely to occur to move
Position, so that sheet metal 15 is firmly fixed.It is noted that this structure of loudspeaker enclosure 100, without in sheet metal
The company's of setting mark structure on 15 and saved even shelves material, reduce cost, meanwhile, avoid the perforate on sheet metal 15, and nothing
Polyester material need to be pasted on sheet metal 15 to cover perforate to form seal cavity.
Preferably, in the present embodiment, the second flanging 1523 is vertical with the first flanging 1522.By by the first flanging
1522 and second flanging 1523 be arranged to orthogonal structure so that mold insert 21 can be from orthogonal X, Y both direction
(as shown in Figure 1) positions to sheet metal 15, and such positioning method causes 11 more difficult generation dystopy of the first housing, ensure that gold
Belong to the accuracy of the injection molding of 15 and first housing of piece 11.
Further, in the present embodiment, the first flanging 1522 and the second flanging 1523 are vertical with main part 151.
By the way that the first flanging 1522 to be all provided with being set to the structure vertical with main part 151 with the second flanging 1523, thus, mold insert 21 can be with
Sheet metal 15 is positioned from orthogonal tri- directions (as shown in Figure 1) of X, Y, Z, is further ensured that sheet metal 15 and first shell
The accuracy of the injection molding of body 11.Specifically, in the present embodiment, it is so that the first flanging 1522 from Fig. 1 shown in X
Horizontal direction helps sheet metal 15 to position so that the second flanging 1523 helps sheet metal 15 in the horizontal direction from Fig. 1 shown in Y
Positioning so that vertical direction of the main part 151 from Fig. 1 shown in Z helps sheet metal 15 to position.
It is understood that 1523 specific bearing of trend structure of the second flanging can have it is a variety of, such as, in this embodiment party
In formula, opposite direction of second flanging 1523 along X shown in Fig. 1, protrude out from lateral margin 1522c towards the side of main part 151；Can be real at other
In the change embodiment applied, the second flanging 1523 can also be along X-direction shown in Fig. 1, from lateral margin 1522 towards away from main part
151 side protrudes out.
It is noted that in the present embodiment, the second flanging 1523 is from one of lateral margin 1522c away from connecting portion 1521
End extension, and the second flanging 1523 does not abut mutually with connecting portion 1521.Second flanging 1523 and connecting portion 1521 are separately positioned, make
Obtaining the first flanging 1522 can be with one time punching molded with the second flanging 1523.Certainly, it will be understood by those skilled in the art that taking
Above-mentioned any one extended structure on the second flanging 1523, all without the technique effect for influenceing present embodiment.
It is noted that through hole 17 can also be offered on the first flanging 1522.By being opened on the first flanging 1522
If through hole 17 so that during embedded injection molding is carried out to sheet metal 15, plastic material can fill full through hole 17,
So as to increase the contact area between the housing 11 of sheet metal 15 and first, thus strengthen fastness therebetween.Need
Bright, the setting of the through hole 17 is to be able to further enhance the fastness between the housing 11 of sheet metal 15 and first, but
It is that, even if not opening up through hole 17 on the first flanging 1522, will not also hinder saving even shelves material, and polyester material need not be pasted
Material carrys out seal cavity this technique effect.
In addition, sheet metal 15 can include multiple fixed parts 152, multiple fixed parts 152 are separately positioned on the phase of main part 151
To both sides.It is understood that the number of fixed part 152 is more, the firmness that sheet metal 15 is combined with the first housing 11 is got over
Height, so in the present embodiment, it is multiple for fixing the housing 11 of sheet metal 15 and first by increasing in the both sides of sheet metal
Fixed part 152, add the firmness that sheet metal 15 is combined with the first housing 11.
It is noted that in the present embodiment, in order that it is more stable between the housing 11 of sheet metal 15 and first, also
The multiple fixed parts 152 for being arranged on the both sides of main part 151 can further be done in position to the setting of face two-by-two, such as
This so that the more balanced for fixed power of the both sides of sheet metal 15 is distributed in, being finally reached makes the housing of sheet metal 15 and first
Purpose more firm between 11.
Second embodiment of the invention also provides a kind of method for producing shell of loudspeaker enclosure 100, in the present embodiment,
The loudspeaker enclosure 100 is the loudspeaker enclosure 100 in first embodiment, as shown in figure 4, specifically including following steps：
S101:Punching press one has the sheet metal of main part, and the first flanging and the second flanging are formed on main part.
Specifically, in step S101, punching press is as shown in Figure 1, sheet metal 15 with main part 151, with main body
The edge in portion 151 forms fixed part 152, and fixed part 152 includes the connecting portion that the edge of main body 151 protrudes out in the horizontal direction
1521, and the first flanging 1522 for bending and protruding out from side of the connecting portion 1521 away from main part 151, the first flanging 1522
The simultaneously top edge away from connecting portion 1521 is oppositely arranged including the bottom 1522a being connected with connecting portion and bottom 1522a
1522b, connection bottom 1522a and top edge 1522b lateral margin 1522c, fixed part 152 also include bending from lateral margin 1522c
And the second flanging 1523 protruded out.
The sheet metal 15 of offer can be stainless steel or other metal materials, typically, metal material
Matter resists permanent deformation under external force and the ability of fracture is strong, service life length, it is worth mentioning at this point that, if using stainless
During the sheet metal of steel material, because the yield of stainless steel is high and price is relatively cheap, holistic cost is advantageously reduced.
S102:There is provided one has raised mold insert, and the first flanging and the second flanging for making sheet metal support from different directions
Lean against in projection to fix sheet metal.
Specifically, step S101 provides the mold insert 21 with projection 19 as shown in Figure 1, make the first flanging of sheet metal 15
1522 and second flanging 1523 be resisted against from different directions in projection 19 to fix sheet metal 15.
S103:Embedded injection molding is carried out so that loudspeaker enclosure is made to the sheet metal being fixed on mold insert.
Specifically, the housing is the first housing 11 in first embodiment, and in step s 103, injection molding is again
Claim injection molding shaping, it is a kind of forming method injected and molded.Specifically, at a certain temperature, helical screw agitator is passed through
The plastic material melted completely, die cavity is injected with high pressure, after cooling and solidifying, obtains the method for products formed.The advantages of this method
It is that speed of production is fast, efficiency high, operates and automation can be achieved, designs and varieties are more, and shape can go from the simple to the complex, and size can be by big
To small, and product size is accurate, and product easily updates, can the complicated product of forming shape.
Compared to prior art, the method for producing shell of loudspeaker enclosure 100 of the invention, there is identical with corresponding device
Technique effect, in order to avoid repeating, repeat no more here.
It is noted that in the present embodiment, step S101 forms orthogonal on the edge of main part 151
First flanging 1522 and the second flanging 1523.Specifically, it is by the way that the first flanging 1522 and the second flanging 1523 are arranged to
Orthogonal structure so that mold insert 21 can be fixed to sheet metal 15 from orthogonal X, Y both direction (as shown in Figure 1)
Position, thus makes sheet metal 15 preferably be fixed on mold insert 21, also, this kind of positioning method causes housing (the first housing 11) more
It is less likely to occur to shift, ensure that the accuracy of the injection molding of 15 and first housing of sheet metal 11.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of loudspeaker enclosure, including the first housing, it is oppositely arranged with the first shell body and assembles to form the of receiving space
Two housings, the sounding monomer being arranged in the receiving space, it is provided with first housing and monomer occurs described in face
Through hole and with the first shell body by integral forming and covering the sheet metal of the through hole, it is characterised in that the sheet metal includes
Horizontally disposed main part and the fixed part for being arranged on the main part edge, the fixed part are included from the main part side
The connecting portion that edge protrudes out in the horizontal direction, and the first folding protruded out from side bending of the connecting portion away from the main part
Side, the bottom and the bottom that first flanging includes being connected with the connecting portion are oppositely arranged and away from the connecting portion
Top edge, the lateral margin of the connection bottom and the top edge, the fixed part also includes bending from the lateral margin convex
The second flanging stretched.
2. loudspeaker enclosure according to claim 1, it is characterised in that second flanging is vertical with first flanging.
3. loudspeaker enclosure according to claim 2, it is characterised in that first flanging and second flanging are and institute
It is vertical to state main part.
4. loudspeaker enclosure according to claim 3, it is characterised in that second flanging is from the lateral margin towards the main body
Portion side protrudes out.
5. loudspeaker enclosure according to claim 3, it is characterised in that second flanging is from the lateral margin towards away from described
The side of main part protrudes out.
6. loudspeaker enclosure according to claim 1, it is characterised in that second flanging is from the lateral margin away from the company
One end bending of socket part protrudes out, and second flanging does not abut mutually with the connecting portion.
7. loudspeaker enclosure according to claim 1, it is characterised in that offer through hole on first flanging.
8. loudspeaker enclosure according to claim 1, it is characterised in that the sheet metal includes multiple fixed parts, institute
State multiple fixed parts and be separately positioned on the relative both sides of the main part.
9. a kind of loudspeaker enclosure case preparation method, including step：
Punching press one has the sheet metal of main part, and to form fixed part at the edge of the main part, the fixed part is included certainly
The connecting portion that the main part edge protrudes out in the horizontal direction, and bent from side of the connecting portion away from the main part
And the first flanging protruded out, the bottom and the bottom that first flanging includes being connected with the connecting portion are oppositely arranged simultaneously
Top edge away from the connecting portion, the lateral margin of the connection bottom and the top edge, the fixed part are also included certainly
The second flanging that the lateral margin bends and protruded out；
There is provided one has raised mold insert, make the sheet metal first flanging and second flanging from different directions
It is resisted against in the projection with the fixation sheet metal；
Injection molding is carried out so that loudspeaker enclosure is made as inserts to the sheet metal being fixed on the mold insert.
10. loudspeaker enclosure preparation method according to claim 9, it is characterised in that the punching press one has main part
The step of sheet metal, forms orthogonal first flanging and second flanging on the edge of the main part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710724936.2A CN107404694B (en) | 2017-08-22 | 2017-08-22 | Loudspeaker box and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710724936.2A CN107404694B (en) | 2017-08-22 | 2017-08-22 | Loudspeaker box and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107404694A true CN107404694A (en) | 2017-11-28 |
| CN107404694B CN107404694B (en) | 2020-09-18 |
Family
ID=60397353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710724936.2A Expired - Fee Related CN107404694B (en) | 2017-08-22 | 2017-08-22 | Loudspeaker box and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107404694B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022110427A1 (en) * | 2020-11-30 | 2022-06-02 | 瑞声声学科技(深圳)有限公司 | Loudspeaker box |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201736398U (en) * | 2010-08-05 | 2011-02-09 | 广东欧珀移动通信有限公司 | Metal insert for in-mould injection molding |
| CN203984674U (en) * | 2014-07-29 | 2014-12-03 | 歌尔声学股份有限公司 | Loud speaker module |
| CN205646101U (en) * | 2016-01-20 | 2016-10-12 | 卜放 | Vehicle |
| CN206107100U (en) * | 2016-09-19 | 2017-04-19 | 北京汽车研究总院有限公司 | Car horn mounting structure and car |
| CN106911975A (en) * | 2015-12-23 | 2017-06-30 | 奥音科技（北京）有限公司 | Sheet metal and loudspeaker enclosure housing for loudspeaker enclosure housing |
-
2017
- 2017-08-22 CN CN201710724936.2A patent/CN107404694B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201736398U (en) * | 2010-08-05 | 2011-02-09 | 广东欧珀移动通信有限公司 | Metal insert for in-mould injection molding |
| CN203984674U (en) * | 2014-07-29 | 2014-12-03 | 歌尔声学股份有限公司 | Loud speaker module |
| CN106911975A (en) * | 2015-12-23 | 2017-06-30 | 奥音科技（北京）有限公司 | Sheet metal and loudspeaker enclosure housing for loudspeaker enclosure housing |
| CN205646101U (en) * | 2016-01-20 | 2016-10-12 | 卜放 | Vehicle |
| CN206107100U (en) * | 2016-09-19 | 2017-04-19 | 北京汽车研究总院有限公司 | Car horn mounting structure and car |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022110427A1 (en) * | 2020-11-30 | 2022-06-02 | 瑞声声学科技(深圳)有限公司 | Loudspeaker box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107404694B (en) | 2020-09-18 |
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Granted publication date: 20200918 Termination date: 20210822 |