CN106231481B - A kind of waveguide - Google Patents
A kind of waveguide Download PDFInfo
- Publication number
- CN106231481B CN106231481B CN201610627761.9A CN201610627761A CN106231481B CN 106231481 B CN106231481 B CN 106231481B CN 201610627761 A CN201610627761 A CN 201610627761A CN 106231481 B CN106231481 B CN 106231481B
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- CN
- China
- Prior art keywords
- acoustic streaming
- tube shell
- streaming cavity
- loudspeaker
- waveguide
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- 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.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
Abstract
A kind of waveguide, including connecting flange portion, the first acoustic streaming cavity portion, arc interconnecting piece and loudspeaker interconnecting piece, outlet sound mouth is equipped in loudspeaker interconnecting piece, first acoustic streaming cavity portion is in isosceles trapezoid, the acoustic streaming cavity lane in circular arc tubulose that multiple big ends with the first acoustic streaming cavity portion communicate is equipped in arc interconnecting piece, the crooked radian size of acoustic streaming cavity lane is sequentially increased from the middle position of outlet sound mouth from two side positions.When acoustic streaming enters the first acoustic streaming cavity portion, the path that acoustic streaming in the first acoustic streaming cavity portion two sides passes through is greater than the path that the acoustic streaming in the middle part of the first acoustic streaming cavity portion passes through, the path of acoustic streaming cavity lane in two side position of outlet sound mouth is less than the path of the acoustic streaming cavity lane in the middle position in outlet sound mouth, the path of acoustic streaming at different location is carried out correction to allow acoustic streaming to pass through outlet sound mouth simultaneously by acoustic streaming cavity lane, audio fruit is improved out, to keep audio effect good.
Description
Technical field
The present invention relates to speaker clothing arts, and in particular to a kind of waveguide.
Background technique
The speaker of the prior art, the music playback frequency band of single loudspeaker have certain width, usually can not be complete
Meet the so wide range of human ear 20-20kHz, it is relatively wide to obtain therefore, it is necessary to install bass, high-pitched driver simultaneously
Frequency range.And be to obtain preferable sound quality, a bugle is usually installed in bass drivers, in Shen on December 17th, 2012
Please, application No. is 2012105447652 patent applications to disclose a kind of speaker, it is disclosed that the structure of bugle includes straight end
With curved end and flare, the part of straight end and curved end composition is waveguide, and the section of straight end part is that class is trapezoidal
Structure, when acoustic streaming is when straight end inner cavity passes through, the path for being in the acoustic streaming of straight end inner cavity two sides, which is greater than, is in straight end inner cavity
The effect in the path of the acoustic streaming in middle position, the sound issued when acoustic streaming is spread out of from flare in this way is inconsistent, is not
It is simultaneously emitted by, audio effect is poor.Existing straight end portion is generally glass steel material, and crooked end is wooden material, in straight end portion
Generally pass through manual viscose glue when connection with crooked end and then be screwed, Joining Technology is complicated, while connecting essence
Spend low appearance also unsightly, screw connection is insecure, be easy to cause sound leakage, while wood materials are easy to split, and will also result in sound
Leakage.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of sound construction, easy for installation, connection structure performance is good simultaneously
The good waveguide of audio effect.
In order to solve the above-mentioned technical problem, the present invention includes integrally formed first wave guide tube shell and second waveguide shell
Body, the first wave guide tube shell includes the first acoustic streaming cavity, the first connecting flange, the first loudspeaker connector, in the first acoustic streaming
The first connecting portion being arc-shaped between cavity and the first loudspeaker connector, the second waveguide tube shell include the second acoustic streaming chamber
Body, the second connecting flange, the second loudspeaker connector, be arc-shaped between the second acoustic streaming cavity and the second loudspeaker connector
Two interconnecting pieces, first wave guide tube shell and second waveguide tube shell pairing are fixed, the first acoustic streaming cavity and the second acoustic streaming cavity shape
At the first acoustic streaming cavity portion, the first connecting flange and the second connecting flange form connecting flange portion, the first loudspeaker connector and the
Two loudspeaker connectors form loudspeaker interconnecting piece, and first connecting portion and second connecting portion form arc interconnecting piece, first acoustic streaming
The shape of cavity portion is trapezium structure, and the small end of the first acoustic streaming cavity portion is equipped in connecting flange portion close to connecting flange portion
With the inlet sound mouth of the first acoustic streaming cavity portion communicated, it is equipped in arc interconnecting piece and communicates with the big end of the first acoustic streaming cavity portion
In the second acoustic streaming cavity portion of circular arc tubulose, the outlet sound mouth communicated with the second acoustic streaming cavity portion is equipped on loudspeaker interconnecting piece,
More than two arc block plates, arc block plate and the second acoustic streaming cavity portion are equipped at outlet sound mouth and in the second acoustic streaming cavity portion
Form multiple acoustic streaming cavity lanes, the crooked radian size of acoustic streaming cavity lane from the middle position of outlet sound mouth from two side positions according to
Secondary increase is equipped with more than two the first grooves being spaced apart from each other on the surface of first wave guide tube shell and second waveguide tube shell.
Because first wave guide tube shell and second waveguide tube shell are integrally formed structures, when first wave guide tube shell and second waveguide
When tube shell pairing is fixed, the first acoustic streaming cavity portion, the second acoustic streaming cavity portion and loudspeaker interconnecting piece are integral structure, waveguide
The globality in portion is more preferable compared to the bugle structure of pervious two-part, and more beautiful, connection structure performance is good, reduces sound
The influence of leakage also eliminates the complicated technologies such as manual viscose glue, polishing, easy for installation.When acoustic streaming enters first by inlet sound mouth
When acoustic streaming cavity portion, the path that the acoustic streaming in the first acoustic streaming cavity portion two sides passes through is greater than the sound in the middle part of the first acoustic streaming cavity portion
The path that stream passes through, then by multiple acoustic streaming cavity lanes when because the crooked radian size of acoustic streaming cavity lane is from speaking
The middle position of mouth is sequentially increased from two side positions, and the path of the acoustic streaming cavity lane in two side position of outlet sound mouth is less than place
In the path of the acoustic streaming cavity lane in the middle position of outlet sound mouth, acoustic streaming cavity lane by the path of the acoustic streaming at different location into
Row correction is to allow acoustic streaming by outlet sound mouth, audio fruit be improved out, to keep audio effect good simultaneously.In first wave conduit
The surface of shell and second waveguide tube shell is equipped with the first groove, can reinforce the overall structure of waveguide, reduces interference of sound
The influence that resonance generates.
As a further improvement of the present invention, it is equipped in the two sides of the first acoustic streaming cavity of the first wave guide tube shell close
Groove is sealed, it is convex equipped with the sealing that can be matched with sealed groove in the two sides of the second acoustic streaming cavity of the second waveguide tube shell
It rises.By the cooperation of seal convexity and sealed groove, further improves first wave guide tube shell and second waveguide tube shell connects
The leakproofness connect reduces the influence of sound leakage.
As a further improvement of the present invention, it is equipped with the first connecting rib at the both ends of the first wave guide tube shell,
The both ends of the second waveguide tube shell are equipped with the second connecting rib, the first connecting rib and the second connecting rib and are connected by bolt
The mode connect connects first wave guide tube shell with second waveguide tube shell.First connecting rib and the second connecting rib can be square
Just user install while also functioning to the effect of reinforcement structure intensity.
As a further improvement of the present invention, the first connection is equipped at the first loudspeaker connector of first wave guide tube shell
Seat, is equipped with the second attachment base at the second loudspeaker connector of second waveguide tube shell, and the first attachment base and the second attachment base are logical
Bolted mode is crossed to connect.
As a further improvement of the present invention, first connect with loudspeaker interconnecting piece is equipped on arc interconnecting piece to reinforce
Muscle is equipped with loudspeaker mounting hole on the first reinforcing rib and loudspeaker interconnecting piece, and connection bump is equipped on loudspeaker interconnecting piece, is being connected
Flange portion is equipped with connection bump.Connection bump, which can be convenient, installs other phonation unit components, plays the role of misplacing position.The
The structural strength of arc interconnecting piece can be improved in one reinforcing rib.
As a further improvement of the present invention, arc is kept off there are four setting at outlet sound mouth and in the second acoustic streaming cavity portion
Piece, four arc block plates and the second acoustic streaming cavity portion form five acoustic streaming cavity lanes.
As a further improvement of the present invention, multiple arcs protrusion is equipped in the second acoustic streaming cavity portion, arc is convex
The crooked radian size risen is successively reduced from the middle position of outlet sound mouth from two side positions, between two adjacent arc convex
Equipped with clamping groove, arc block plate is matched with clamping groove.Arc convex at different location, can acoustic streaming cavity to different location
The adjustment in further path is done in channel, so that the path to acoustic streaming is further corrected, makes to show that audio fruit is more preferable.
As a further improvement of the present invention, the arc block plate is aluminium flake, the first wave guide tube shell and the second wave
Catheter body is glass fibre material or cluster film plastic material.Because arc block plate is aluminium flake, damage of the aluminium flake to sound timbre
It consumes small, can further promote sound quality.
As a further improvement of the present invention, second connect with the first connecting flange is equipped on first wave guide tube shell
Reinforcing rib is equipped with the second reinforcing rib connecting with the second connecting flange on second waveguide tube shell.Second reinforcing rib can be into
One step mentions the structural strength of waveguide.
As a further improvement of the present invention, the shape of the inlet sound mouth is circle, and the diameter of inlet sound mouth is 36mm, described
The shape of outlet sound mouth be it is rectangular, the bond length of outlet sound mouth is 25mm, and the shape of the first acoustic streaming cavity portion is isosceles trapezoid
Structure, the angle of the angle of isosceles trapezoid two sides are 135 °.
In conclusion it is an advantage of the invention that sound construction, easy for installation, the good audio effect simultaneously of connection structure performance
It is good.
Detailed description of the invention
It is next with reference to the accompanying drawings and detailed description that the present invention will be further described in detail.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of first wave guide tube shell of the invention.
Fig. 3 is the structural schematic diagram of second waveguide tube shell of the invention.
Specific embodiment
As shown in Figure 1 to Figure 3, the present invention includes integrally formed first wave guide tube shell 1 and second waveguide tube shell 2,
The first wave guide tube shell 1 includes the first acoustic streaming cavity 3, the first connecting flange 4, the first loudspeaker connector 5, in the first acoustic streaming
The first connecting portion 6 being arc-shaped between cavity 3 and the first loudspeaker connector 5, the second waveguide tube shell 2 include the rising tone
Cavity 7, the second connecting flange 8, the second loudspeaker connector 9 are flowed, is between the second acoustic streaming cavity 7 and the second loudspeaker connector 9
Arc-shaped second connecting portion 10 is equipped with sealed groove in the two sides of the first acoustic streaming cavity 3 of the first wave guide tube shell 1
11, it is convex equipped with the sealing that can be matched with sealed groove 11 in the two sides of the second acoustic streaming cavity 7 of the second waveguide tube shell 2
12 are played, the first connecting rib 13 is equipped at the both ends of the first wave guide tube shell 1, the two of the second waveguide tube shell 2
End is equipped with the second connecting rib 14, and the first connecting rib 13 and the second connecting rib 14 make first wave by bolted connection
Catheter body 1 and 2 pairing of second waveguide tube shell are fixed, and the is equipped at the first loudspeaker connector 5 of first wave guide tube shell 1
A connecting seat 15 is equipped with the second attachment base 16, the first attachment base 15 at the second loudspeaker connector 9 of second waveguide tube shell 2
It is connect by bolted connection with the second attachment base 16, the first acoustic streaming cavity 3 and the second acoustic streaming cavity 7 form the first acoustic streaming
Cavity portion, the first connecting flange 4 and the second connecting flange 8 form connecting flange portion 17, the first loudspeaker connector 5 and the second loudspeaker
Connector 9 forms loudspeaker interconnecting piece 18, and first connecting portion 6 and second connecting portion 10 form arc interconnecting piece 19, connects in arc
Portion 19 is equipped with the first reinforcing rib 20 connecting with loudspeaker interconnecting piece 18, is equipped on the first reinforcing rib 20 and loudspeaker interconnecting piece 18
Loudspeaker mounting hole 21 is equipped with connection bump 22 on loudspeaker interconnecting piece 18, and connection bump 22, institute are equipped in connecting flange portion 17
The shape for stating the first acoustic streaming cavity portion is isosceles trapezoidal structure, and the angle of the angle of isosceles trapezoid two sides is 135 °, the first sound
Flow cavity portion small end close to connecting flange portion 17, in connecting flange portion 17 be equipped with the first acoustic streaming cavity portion communicate into
Sound mouth 23 is equipped with the second acoustic streaming chamber in circular arc tubulose communicated with the big end of the first acoustic streaming cavity portion in arc interconnecting piece 19
Body portion, is equipped with the outlet sound mouth 24 communicated with the second acoustic streaming cavity portion on loudspeaker interconnecting piece 18, and the shape of the inlet sound mouth 23 is
Circle, the diameter of inlet sound mouth 23 are 36mm, the shape of the outlet sound mouth 24 be it is rectangular, the bond length of outlet sound mouth 24 is 25mm,
Middle position in the second acoustic streaming cavity portion is equipped with the first arc convex 25, respectively sets in the two sides of the first arc convex 25
There is second arc convex 26, the crooked radian of the first arc convex 25 is greater than the crooked radian of the second arc convex 26, the
Clamping groove 27 is equipped between one arc convex 25 and the second arc convex 26, in the second arc convex 26 far from the first arc convex
25 one end is equipped with clamping groove 27, and clamping groove 27 is equipped with arc block plate 28, four arc block plates 28 and the second acoustic streaming cavity portion
Form five acoustic streaming cavity lanes 29, the crooked radian size of acoustic streaming cavity lane 29 is from the middle position of outlet sound mouth 24 from two sides
Position is sequentially increased, the surface of first wave guide tube shell 1 and second waveguide tube shell 2 be equipped with it is multiple be spaced apart from each other it is first recessed
Slot 30 is equipped with the second reinforcing rib 31 connecting with the first connecting flange 4, in second waveguide shell on first wave guide tube shell 1
Body 2 is equipped with the second reinforcing rib 31 connecting with the second connecting flange 8.Because of first wave guide tube shell 1 and second waveguide shell
Body 2 is integrally formed structures, when first wave guide tube shell 1 and fixed 2 pairing of second waveguide tube shell, the first acoustic streaming cavity
Portion, the second acoustic streaming cavity portion and loudspeaker interconnecting piece 18 are integral structure, and the globality of waveguide pipe portion is compared to pervious two
The bugle structure of fraction is more preferable, more beautiful, and connection structure performance is good, reduces the influence of sound leakage, also eliminate manual viscose glue,
The complicated technologies such as polishing, it is easy for installation.When acoustic streaming enters the first acoustic streaming cavity portion by inlet sound mouth 23, in the first acoustic streaming chamber
The path that the acoustic streaming of body portion two sides passes through is greater than the path that the acoustic streaming in the middle part of the first acoustic streaming cavity portion passes through, then by multiple
When acoustic streaming cavity lane 29 because the crooked radian size of acoustic streaming cavity lane 29 from the middle position of outlet sound mouth 24 from two sides position
It sets and is sequentially increased, and the path of the acoustic streaming cavity lane 29 in 24 liang of side positions of outlet sound mouth is less than the centre in outlet sound mouth 24
The path of the acoustic streaming cavity lane 29 of position, acoustic streaming cavity lane 29 by the path of the acoustic streaming at different location carry out correction to
Acoustic streaming is set by outlet sound mouth 24, to improve out audio fruit simultaneously, thus keep audio effect good, the first arc convex 25 and second
Arc convex 26 can the acoustic streaming cavity lane 29 to different location do the adjustment in further path, thus to the path of acoustic streaming into
Row further correction, makes to show that audio fruit is more preferable.The is equipped on the surface of first wave guide tube shell 1 and second waveguide tube shell 2
One groove 30 can reinforce the overall structure of waveguide, reduce the influence that interference of sound resonance generates.By seal convexity 12 with
The cooperation of sealed groove 11 further improves the leakproofness that first wave guide tube shell 1 is connect with second waveguide tube shell 2, subtracts
The influence of few sound leakage.First connecting rib 13 and the second connecting rib 14 can be convenient user and carry out installing while also functioning to reinforcement
The effect of structural strength.The structural strength of arc interconnecting piece 19 can be improved in first reinforcing rib 20.Second reinforcing rib 31 can be into
One step mentions the structural strength of waveguide.Connection bump 22, which can be convenient, installs other phonation unit components, plays and misplaces position
Effect.The arc block plate 28 can be aluminium flake, and the first wave guide tube shell 1 and second waveguide tube shell 2 can be glass
Fiber Materials or cluster film plastic material, because arc block plate 28 is aluminium flake, aluminium flake is small to the loss of sound timbre, can be into one
Step promotes sound quality.
Claims (9)
1. a kind of waveguide, it is characterised in that: described including integrally formed first wave guide tube shell and second waveguide tube shell
First wave guide tube shell includes the first acoustic streaming cavity, the first connecting flange, the first loudspeaker connector, in the first acoustic streaming cavity and the
The first connecting portion being arc-shaped between one loudspeaker connector, the second waveguide tube shell include the second acoustic streaming cavity, second
Connecting flange, the second loudspeaker connector, the second connection being arc-shaped between the second acoustic streaming cavity and the second loudspeaker connector
Portion, first wave guide tube shell and second waveguide tube shell pairing are fixed, and the first acoustic streaming cavity and the second acoustic streaming cavity form first
Acoustic streaming cavity portion, the first connecting flange and the second connecting flange form connecting flange portion, the first loudspeaker connector and the second loudspeaker
Connector forms loudspeaker interconnecting piece, and first connecting portion and second connecting portion form arc interconnecting piece, the first acoustic streaming cavity portion
Shape be isosceles trapezoidal structure, the small end of the first acoustic streaming cavity portion close to connecting flange portion, in connecting flange portion be equipped with
The inlet sound mouth of first acoustic streaming cavity portion communicated, is equipped in arc interconnecting piece and with what the big end of the first acoustic streaming cavity portion communicated is in
Second acoustic streaming cavity portion of circular arc tubulose is equipped with the outlet sound mouth communicated with the second acoustic streaming cavity portion on loudspeaker interconnecting piece, is going out
More than two arc block plates, arc block plate and the second acoustic streaming cavity portion shape are equipped at sound mouth and in the second acoustic streaming cavity portion
Multiple arcs protrusion is equipped at multiple acoustic streaming cavity lanes, in the second acoustic streaming cavity portion, the crooked radian of arc convex is big
The small middle position from outlet sound mouth is successively reduced from two side positions, and clamping groove, arc are equipped between two adjacent arc convex
Shape baffle is matched with clamping groove, is equipped on the surface of first wave guide tube shell and second waveguide tube shell more than two mutual
Every the first groove.
2. waveguide according to claim 1, it is characterised in that: in the first acoustic streaming cavity of the first wave guide tube shell
Two sides are equipped with sealed groove, are equipped with and can match with sealed groove in the two sides of the second acoustic streaming cavity of the second waveguide tube shell
The seal convexity of conjunction.
3. waveguide according to claim 1, it is characterised in that: be equipped with first at the both ends of the first wave guide tube shell and connect
Gusset is connect, is equipped with the second connecting rib, the first connecting rib and the second connecting rib at the both ends of the second waveguide tube shell
Connect first wave guide tube shell with second waveguide tube shell.
4. waveguide according to claim 1, it is characterised in that: set at the first loudspeaker connector of first wave guide tube shell
There is the first attachment base, the second attachment base, the first attachment base and the are equipped at the second loudspeaker connector of second waveguide tube shell
Two attachment bases connect by bolted connection.
5. waveguide according to claim 1, it is characterised in that: be equipped on arc interconnecting piece and connect with loudspeaker interconnecting piece
First reinforcing rib is equipped with loudspeaker mounting hole on the first reinforcing rib and loudspeaker interconnecting piece, and it is convex that connection is equipped on loudspeaker interconnecting piece
It rises, connection bump is equipped in connecting flange portion.
6. waveguide according to claim 1, it is characterised in that: be equipped at outlet sound mouth and in the second acoustic streaming cavity portion
Four arc block plates, four arc block plates and the second acoustic streaming cavity portion form five acoustic streaming cavity lanes.
7. waveguide according to claim 1, it is characterised in that: the arc block plate is aluminium flake, the first wave guide shell
Body and second waveguide tube shell are glass fibre material or cluster film plastic material.
8. waveguide according to claim 1, it is characterised in that: be equipped with and the first connecting flange on first wave guide tube shell
Second reinforcing rib of connection is equipped with the second reinforcing rib connecting with the second connecting flange on second waveguide tube shell.
9. waveguide according to claim 1, it is characterised in that: the shape of the inlet sound mouth is circle, the diameter of inlet sound mouth
For 36mm, the shape of the outlet sound mouth be it is rectangular, the bond length of outlet sound mouth is 25mm, the angle of the angle of isosceles trapezoid two sides
Degree is 135 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610627761.9A CN106231481B (en) | 2016-08-03 | 2016-08-03 | A kind of waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610627761.9A CN106231481B (en) | 2016-08-03 | 2016-08-03 | A kind of waveguide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106231481A CN106231481A (en) | 2016-12-14 |
| CN106231481B true CN106231481B (en) | 2019-02-22 |
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ID=57536435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610627761.9A Active CN106231481B (en) | 2016-08-03 | 2016-08-03 | A kind of waveguide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106231481B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519871B (en) * | 2018-12-28 | 2023-11-17 | 浙江嘉利（丽水）工业股份有限公司 | Automobile signal lamp with three-dimensional luminous effect |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003088206A2 (en) * | 2002-04-05 | 2003-10-23 | Harman International Industries, Inc. | Internal lens system for loudspeaker waveguides |
| CN201111892Y (en) * | 2007-10-05 | 2008-09-10 | 鹤山丽得电子实业有限公司 | Acoustic lens |
| CN201421712Y (en) * | 2009-03-25 | 2010-03-10 | 闻克俭 | High sound wave guide tube |
| CN203608339U (en) * | 2013-10-14 | 2014-05-21 | 斯贝克电子（嘉善）有限公司 | Waveguide tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2827732B1 (en) * | 2001-07-23 | 2004-01-23 | Nexo | ELECTROACOUSTIC SOUND UNIT WITH PAVILION OR ACOUSTIC WAVEGUIDE |
-
2016
- 2016-08-03 CN CN201610627761.9A patent/CN106231481B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003088206A2 (en) * | 2002-04-05 | 2003-10-23 | Harman International Industries, Inc. | Internal lens system for loudspeaker waveguides |
| CN201111892Y (en) * | 2007-10-05 | 2008-09-10 | 鹤山丽得电子实业有限公司 | Acoustic lens |
| CN201421712Y (en) * | 2009-03-25 | 2010-03-10 | 闻克俭 | High sound wave guide tube |
| CN203608339U (en) * | 2013-10-14 | 2014-05-21 | 斯贝克电子（嘉善）有限公司 | Waveguide tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106231481A (en) | 2016-12-14 |
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