CN110166910B - Loudspeaker - Google Patents
Loudspeaker Download PDFInfo
- Publication number
- CN110166910B CN110166910B CN201910488209.XA CN201910488209A CN110166910B CN 110166910 B CN110166910 B CN 110166910B CN 201910488209 A CN201910488209 A CN 201910488209A CN 110166910 B CN110166910 B CN 110166910B
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- CN
- China
- Prior art keywords
- annular
- voice coil
- plate
- extension portion
- loudspeaker
- Prior art date
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- Expired - Fee Related
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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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
- H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
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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
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Abstract
The invention provides a loudspeaker, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the basin frame comprises a bottom frame used for accommodating the magnetic circuit system and a top cover fixed on the magnetic circuit system, the vibration system comprises a first annular vibration film, a second annular vibration film, an annular dome, a voice coil, an annular framework and a connecting framework, the outer side of the first annular vibration film is connected with the bottom frame, the inner side of the first annular vibration film is connected with the annular bottom of the annular framework, the annular top of the annular framework is connected with the outer side of the annular dome, the outer side of the second annular vibration film is connected with the inner side of the annular dome, the inner side of the second annular vibration film is connected with the top cover, one end of the connecting framework is connected with the voice coil, and. The loudspeaker provided by the invention has the advantages that the vibration system is arranged and adopts a double-vibrating-diaphragm structure of the first annular vibrating diaphragm and the second annular vibrating diaphragm, so that the vibration of the vibration system is more balanced, noise caused by vibration unbalance is effectively reduced, and the tone quality is effectively improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of acoustic design, in particular to a loudspeaker.
[ background of the invention ]
With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among many mobile devices, a mobile phone is undoubtedly the most common mobile terminal device. At present, mobile phones have various functions, one of which is a high-quality music function, and a speaker in the mobile phone is one of the necessary conditions for realizing the high-quality function.
The existing loudspeaker comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are installed on the basin frame, the vibration system comprises a vibrating diaphragm, an annular ball top, a framework and a voice coil, the annular ball top is connected with the vibrating diaphragm, and the voice coil is connected with the annular ball top through the framework in the vibration direction so as to drive the vibrating diaphragm to vibrate and produce sound. The structure of the existing loudspeaker adopts the design mode of a single diaphragm, so that the vibration of a vibration system is unbalanced, and more noise exists.
Therefore, it is necessary to develop a new speaker to solve the above problems.
[ summary of the invention ]
The invention aims to provide a loudspeaker, which can enable the vibration of a vibration system to be more balanced, effectively reduce noise caused by vibration imbalance and effectively improve the tone quality.
The purpose of the invention is realized by adopting the following technical scheme:
a loudspeaker comprises a vibration system, a magnetic circuit system used for driving the vibration system to generate sound through vibration and a basin frame used for supplying the vibration system and the magnetic circuit system to be installed, wherein the basin frame comprises a bottom frame used for accommodating the magnetic circuit system and a top cover fixed on the magnetic circuit system, the vibration system comprises a first annular vibrating diaphragm, a second annular vibrating diaphragm, an annular dome, a voice coil, an annular framework and a connecting framework, the outer side of the first annular vibrating diaphragm is connected with the bottom frame, the inner side of the first annular vibrating diaphragm is connected with the annular bottom of the annular framework, the annular top of the annular framework is connected with the outer side of the annular dome, the outer side of the second annular vibrating diaphragm is connected with the inner side of the annular dome, the inner side of the second annular vibrating diaphragm is connected with the top cover, one end of the connecting framework is connected with the voice coil, The other end is connected with the annular dome.
As a modification, the magnetic circuit system is located inside the second annular diaphragm.
As an improvement, the magnetic circuit system includes a magnetic conduction plate installed in the middle of the bottom frame, a main magnetic steel arranged in the middle of the magnetic conduction plate, four auxiliary magnetic steels arranged on the magnetic conduction plate and surrounding the main magnetic steel, a main pole core attached to one side of the main magnetic steel far away from the magnetic conduction plate, and four auxiliary pole cores attached to one side of the four auxiliary magnetic steels far away from the magnetic conduction plate, respectively, the main magnetic steel and the auxiliary magnetic steels are arranged at intervals, and the voice coil is movably sleeved outside the main magnetic steel.
As an improvement mode, the underframe comprises a bottom plate and a first side plate convexly arranged at the edge of the bottom plate, the outer side of the first annular vibrating diaphragm is connected with the first side plate, a through hole is formed in the middle of the bottom plate, and the magnetic conducting plate is embedded in the through hole.
As an improvement, the top cover includes a top plate, a protrusion protruding from the middle of the top plate, and a second side plate protruding from the edge of the top plate, one side of the protrusion away from the top plate is connected to the magnetic circuit system, the inner side of the second annular diaphragm is connected to the second side plate, and the voice coil is movably sleeved outside the protrusion.
As an improvement, the number of the connecting skeletons is two, and the two connecting skeletons extend from two opposite sides of the voice coil to be connected with the annular dome respectively.
As an improved mode, an avoiding notch for avoiding the second side plate is concavely arranged on one side of each connecting framework facing the second side plate.
As an improvement, each of the connection skeletons includes a first extension portion, a second extension portion and a third extension portion, the first extension portion is disposed at the side of the voice coil at an interval, the second extension portion and the third extension portion are respectively connected to the outer side wall of the voice coil from two ends of the first extension portion along a direction perpendicular to the vibration direction of the voice coil, the first extension portion is connected to the annular dome, and the avoidance gap is disposed in the second extension portion and the third extension portion.
As an improvement, the first annular diaphragm includes a first folding ring, a first fixing portion located inside the first folding ring, and a second fixing portion located outside the first folding ring, the first fixing portion is connected to the outside of the annular dome, and the second fixing portion is connected to the bottom frame; the second annular vibrating diaphragm comprises a second folding ring, a third fixing part and a fourth fixing part, the third fixing part is located on the inner side of the second folding ring, the fourth fixing part is located on the outer side of the second folding ring, the third fixing part is connected with the top cover, and the fourth fixing part is connected with the inner side of the annular ball top.
As an improvement, the first folding ring is an arc-shaped structure with two ends respectively bending and protruding from the first fixing part and the second fixing part towards the direction of the bottom frame; the second folding ring is of an arc-shaped structure with two ends respectively bent and convexly arranged from the third fixing part and the fourth fixing part towards the direction far away from the bottom frame.
Compared with the prior art, the vibration system comprises the double-vibration-membrane structure of the first annular vibration membrane and the second annular vibration membrane, so that the vibration of the vibration system is more balanced, noise caused by unbalanced vibration is effectively reduced, and the tone quality is effectively improved; in addition, through foretell connected mode, first annular vibrating diaphragm, second annular vibrating diaphragm, annular dome, annular skeleton, underframe and top cap are whole can enclose and close a formation sealed space, guarantee the leakproofness.
[ description of the drawings ]
Fig. 1 is a schematic top view of a speaker according to an embodiment of the present invention;
FIG. 2 is a schematic partial cross-sectional view of section A-A of FIG. 1;
fig. 3 is an exploded view of a speaker according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a top cover according to an embodiment of the present invention;
FIG. 5 is an exploded view of a vibration system provided by an embodiment of the present invention;
fig. 6 is an exploded view of a magnetic circuit system according to an embodiment of the present invention;
fig. 7 is a schematic connection diagram of a voice coil and a connection bobbin according to an embodiment of the present invention.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
It should be noted that all directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 1 to 7, a speaker 100 according to an embodiment of the present invention includes a frame 10, a vibration system 20 mounted on the frame 10, and a magnetic circuit system 30 mounted on the frame 10 for driving the vibration system 20 to vibrate and generate sound.
The basin stand 10 comprises a bottom frame 11 for accommodating the magnetic circuit system 30 and a top cover 12 fixed on the magnetic circuit system 30, wherein the bottom frame 11 comprises a bottom plate 111 and a first side plate 112 protruding from the edge of the bottom plate 111, the top cover 12 comprises a top plate 121, a second side plate 122 protruding from the edge of the top plate, and a projection 123 protruding from the middle of the top plate 121, and one side of the projection 123 far away from the top plate 121 is connected with the magnetic circuit system 30. Preferably, the bottom plate 111 and the top plate 121 are arranged in parallel, the first side plate 112 extends from an edge of the bottom plate 111 toward a side of the top plate 121, and the second side plate 122 extends from an edge of the top plate 121 toward the side of the bottom plate 111.
The first annular diaphragm 21 includes a first folding ring 211, a first fixing portion 212 located inside the first folding ring 211, and a second fixing portion 213 located outside the first folding ring 211, the first fixing portion 212 is connected to the outside of the annular dome 23, and the second fixing portion 213 is connected to the bottom frame 11, specifically to the first side plate 112; the second annular diaphragm 22 includes a second folding ring 221, a third fixing portion 222 located inside the second folding ring 221, and a fourth fixing portion 223 located outside the second folding ring 221, the third fixing portion 222 is connected to the top cover 12, specifically, connected to the second side plate 122, and the fourth fixing portion 223 is connected to the inside of the annular dome 23.
The first folding ring 211 is an arc-shaped structure with two ends respectively bending and protruding from the first fixing part 212 and the second fixing part 213 towards the bottom frame 11; the second folding ring 221 has an arc structure with two ends respectively bending and protruding from the third fixing portion 222 and the fourth fixing portion 223 toward a direction away from the bottom frame 11.
The voice coil 24 is movably sleeved outside the protrusion 123.
The connection ribs 26 are provided in two, and the two connection ribs 26 extend from two opposite sides of the voice coil 24 to connect the annular domes 23, respectively. By providing two connection skeletons 26 extending from two opposite sides of the voice coil 24 to be connected to the annular dome 23, the voice coil 24 can transmit vibration to the annular dome 23 in a balanced manner through the two connection skeletons 26, so that the vibration system 20 vibrates in a balanced manner, and the tone quality is improved. It should be understood that the number of the connecting skeletons 26 is not limited to two, and any number of the connecting skeletons 26 including one, three, or four may be provided, as long as the voice coil 24 can drive the first annular diaphragm 21 and the second annular diaphragm 22 to vibrate through the connecting skeletons 26.
An escape notch 27 for escaping the second side plate 122 is concavely provided on one side of each connecting framework 26 facing the second side plate 122. The vibration stroke of the voice coil 24 can be effectively increased by providing the escape notch 27, thereby increasing the power of the speaker 100.
Each of the connection skeletons 26 includes a first extension portion 261, a second extension portion 262 and a third extension portion 263, the first extension portion 261 is disposed at the side of the voice coil 24 at intervals, the second extension portion 262 and the third extension portion 263 are respectively connected to the outer side wall of the voice coil 24 from the two ends of the first extension portion 261 along the direction perpendicular to the vibration direction of the voice coil 24, the first extension portion 261 is connected to the annular dome 23, and the avoidance gap 27 is disposed between the second extension portion 262 and the third extension portion 263. With this arrangement, the first extension portion 261 and the annular dome 23 have a larger connecting area, and the connection between the connection bobbin 26 and the annular dome 23 is more stable, so that when the voice coil 24 drives the annular dome 23 to vibrate at high frequency or at large amplitude through the connection bobbin 26, the joint between the connection bobbin 26 and the annular dome 23 is not easily broken.
The magnetic circuit system 30 is located inside the second annular diaphragm 122. By setting magnetic circuit 30 to be located inside second annular diaphragm 122, vibration system 20 does not cause an obstruction to voice coil 24 in the vibration direction of voice coil 24, can greatly improve the effective vibration space of voice coil 24, promote the power of loudspeaker 100, and be convenient for magnetic circuit 30's optimal design.
The magnetic circuit system 30 includes a magnetic conduction plate 31 installed in the middle of the bottom frame 111, a main magnetic steel 32 installed in the middle of the magnetic conduction plate 31, four auxiliary magnetic steels 33 installed on the magnetic conduction plate 31 and surrounding the main magnetic steel 32, a main pole core 34 attached to one side of the main magnetic steel 32 away from the magnetic conduction plate 31, and four auxiliary pole cores 35 attached to one sides of the four auxiliary magnetic steels 33 away from the magnetic conduction plate 31, the main magnetic steel 32 and the auxiliary magnetic steels 33 are arranged at intervals, and the voice coil 24 is movably sleeved outside the main magnetic steel 32. It is understood that the number of the secondary magnetic steels 33 is not limited to four, for example, two secondary magnetic steels 33 are provided, and it is also possible that two secondary magnetic steels 33 are respectively provided on two opposite sides of the primary magnetic steel 32.
The middle of the bottom plate 111 is provided with a through hole 113, and the magnetic conduction plate 31 is embedded in the through hole 113. Due to the limitation of the size of the loudspeaker 100, the distance from the bottom plate 111 to the annular dome 23 is limited, and the through hole 113 is formed in the bottom plate 111, so that the magnetic conduction plate 31 is embedded in the through hole 113, the distance from the bottom plate 111 to the annular dome 23 occupied by the magnetic conduction plate 31 can be reduced, the effective vibration space of the voice coil 24 can be enlarged, and the power of the loudspeaker 100 is improved.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a loudspeaker, includes vibration system, is used for the drive vibration system vibrates the magnetic circuit of sound production and is used for supplying vibration system with the basin frame of magnetic circuit installation, a serial communication port, the basin frame is including being used for acceping magnetic circuit's underframe and being fixed in top cap on the magnetic circuit, vibration system includes first annular vibrating diaphragm, second annular vibrating diaphragm, annular dome, voice coil loudspeaker voice coil, annular skeleton and connection skeleton, the outside of first annular vibrating diaphragm with the underframe is connected, the inboard of first annular vibrating diaphragm with the annular bottom of annular skeleton is connected, the annular top of annular skeleton with the outside of annular dome is connected, the outside of second annular vibrating diaphragm with the inboard of annular dome is connected, the inboard of second annular vibrating diaphragm with the top cap is connected, the one end of connecting the skeleton with the voice coil loudspeaker voice coil is connected, The other end is connected with the annular dome.
2. A loudspeaker according to claim 1, wherein the magnetic circuit is located on the inside of the second annular diaphragm.
3. The loudspeaker of claim 2, wherein the magnetic circuit system comprises a magnetic conductive plate mounted in the middle of the bottom frame, a main magnetic steel disposed in the middle of the magnetic conductive plate, four sub magnetic steels disposed on the magnetic conductive plate and surrounding the main magnetic steel, a main pole core attached to one side of the main magnetic steel away from the magnetic conductive plate, and four sub pole cores attached to one sides of the four sub magnetic steels away from the magnetic conductive plate, the main magnetic steel and the sub magnetic steel being spaced apart from each other, and the voice coil being movably sleeved outside the main magnetic steel.
4. The loudspeaker of claim 3, wherein the bottom frame comprises a bottom plate and a first side plate protruding from an edge of the bottom plate, an outer side of the first annular diaphragm is connected to the first side plate, a through hole is formed in the middle of the bottom plate, and the magnetic conductive plate is embedded in the through hole.
5. The loudspeaker of claim 1, wherein the top cover comprises a top plate, a protrusion protruding from the middle of the top plate, and a second side plate protruding from the edge of the top plate, one side of the protrusion away from the top plate is connected to the magnetic circuit system, the inner side of the second annular diaphragm is connected to the second side plate, and the voice coil is movably sleeved outside the protrusion.
6. The speaker of claim 5, wherein there are two of the connection ribs, and the two connection ribs extend from two opposite sides of the voice coil to connect the annular dome.
7. The loudspeaker of claim 6, wherein each side of the connecting framework facing the second side plate is recessed with an avoidance notch for avoiding the second side plate.
8. The speaker of claim 7, wherein each of the connection skeletons includes a first extension portion, a second extension portion and a third extension portion, the first extension portion is disposed at a side of the voice coil at an interval, the second extension portion and the third extension portion are respectively connected to an outer sidewall of the voice coil from two ends of the first extension portion along a direction perpendicular to a vibration direction of the voice coil, the first extension portion is connected to the annular dome, and the avoidance gap is disposed between the second extension portion and the third extension portion.
9. The loudspeaker according to any one of claims 1 to 8, wherein the first ring-shaped diaphragm includes a first edge, a first fixing portion located inside the first edge, and a second fixing portion located outside the first edge, the first fixing portion being connected to an outside of the ring-shaped dome, the second fixing portion being connected to the bottom frame; the second annular vibrating diaphragm comprises a second folding ring, a third fixing part and a fourth fixing part, the third fixing part is located on the inner side of the second folding ring, the fourth fixing part is located on the outer side of the second folding ring, the third fixing part is connected with the top cover, and the fourth fixing part is connected with the inner side of the annular ball top.
10. The speaker of claim 9, wherein the first edge is an arc-shaped structure with two ends respectively bending and protruding from the first fixing portion and the second fixing portion toward the bottom frame; the second folding ring is of an arc-shaped structure with two ends respectively bent and convexly arranged from the third fixing part and the fourth fixing part towards the direction far away from the bottom frame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019103877287 | 2019-05-10 | ||
| CN201910387728 | 2019-05-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110166910A CN110166910A (en) | 2019-08-23 |
| CN110166910B true CN110166910B (en) | 2021-01-08 |
Family
ID=67450376
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910462108.5A Active CN110149579B (en) | 2019-05-10 | 2019-05-30 | Magnetic circuit system and loudspeaker using same |
| CN201910487407.4A Active CN110099341B (en) | 2019-05-10 | 2019-06-05 | Loudspeaker |
| CN201910487405.5A Active CN110149580B (en) | 2019-05-10 | 2019-06-05 | Loudspeaker |
| CN201910488209.XA Expired - Fee Related CN110166910B (en) | 2019-05-10 | 2019-06-05 | Loudspeaker |
| CN201911379696.2A Active CN111510827B (en) | 2019-05-10 | 2019-12-27 | Sound production device |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910462108.5A Active CN110149579B (en) | 2019-05-10 | 2019-05-30 | Magnetic circuit system and loudspeaker using same |
| CN201910487407.4A Active CN110099341B (en) | 2019-05-10 | 2019-06-05 | Loudspeaker |
| CN201910487405.5A Active CN110149580B (en) | 2019-05-10 | 2019-06-05 | Loudspeaker |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911379696.2A Active CN111510827B (en) | 2019-05-10 | 2019-12-27 | Sound production device |
Country Status (2)
| Country | Link |
|---|---|
| CN (5) | CN110149579B (en) |
| WO (5) | WO2020227956A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020227956A1 (en) * | 2019-05-10 | 2020-11-19 | 瑞声声学科技(深圳)有限公司 | Magnetic circuit system and a loudspeaker using same |
| CN111405422B (en) * | 2019-11-21 | 2021-11-12 | 瑞声科技(新加坡)有限公司 | Sound production device |
| WO2021128048A1 (en) * | 2019-12-25 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound production device |
| WO2021128332A1 (en) * | 2019-12-27 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound production device |
| WO2021128330A1 (en) * | 2019-12-27 | 2021-07-01 | 瑞声声学科技(深圳)有限公司 | Sound generation device |
| WO2021134185A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Sound production device |
| WO2021134184A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Sound emission device |
| CN212034339U (en) * | 2020-05-20 | 2020-11-27 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
| CN212034341U (en) * | 2020-05-20 | 2020-11-27 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
| CN111901732B (en) * | 2020-06-24 | 2021-04-27 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN212486779U (en) * | 2020-06-30 | 2021-02-05 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN212785823U (en) * | 2020-07-06 | 2021-03-23 | 瑞声科技(新加坡)有限公司 | Sounding device |
| CN213462308U (en) * | 2020-07-06 | 2021-06-15 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN112165675B (en) * | 2020-10-22 | 2021-09-24 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker |
| CN112511958B (en) * | 2020-12-18 | 2021-11-16 | 瑞声新能源发展(常州)有限公司科教城分公司 | Sound producing device |
| CN213846499U (en) * | 2020-12-30 | 2021-07-30 | 歌尔股份有限公司 | Exciter and electronic product |
| CN116887145B (en) * | 2023-08-10 | 2024-01-26 | 汉得利（常州）电子股份有限公司 | Magnetic circuit structure and double-sided loudspeaker |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020227956A1 (en) | 2020-11-19 |
| WO2020228081A1 (en) | 2020-11-19 |
| WO2020228079A1 (en) | 2020-11-19 |
| CN110099341B (en) | 2021-07-09 |
| CN110149579A (en) | 2019-08-20 |
| CN110166910A (en) | 2019-08-23 |
| WO2020228341A1 (en) | 2020-11-19 |
| CN110149580B (en) | 2021-02-12 |
| WO2020228080A1 (en) | 2020-11-19 |
| CN110149579B (en) | 2021-08-10 |
| CN110099341A (en) | 2019-08-06 |
| CN111510827B (en) | 2021-12-24 |
| CN111510827A (en) | 2020-08-07 |
| CN110149580A (en) | 2019-08-20 |
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