CN107454550B - Production device for double-structure cone folding ring - Google Patents
Production device for double-structure cone folding ring Download PDFInfo
- Publication number
- CN107454550B CN107454550B CN201710890945.9A CN201710890945A CN107454550B CN 107454550 B CN107454550 B CN 107454550B CN 201710890945 A CN201710890945 A CN 201710890945A CN 107454550 B CN107454550 B CN 107454550B
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- Prior art keywords
- cylinder
- annular
- die
- curved surface
- double
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000003292 glue Substances 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
- H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
- H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production device of a double-structure cone folding ring, which comprises a machine base, a workbench, an upper fixing plate, a production die, a heat-insulating glue injection barrel, a first cylinder, a second cylinder and a third cylinder, wherein the workbench is arranged on the machine base, the production die consists of a lower die, a middle die and an upper die, the lower die is fixedly embedded on the workbench, the middle die is connected with the upper fixing plate through the first cylinder, the upper die is connected with the upper fixing plate through the second cylinder, the periphery of the lower die is provided with the annular heat-insulating glue injection barrel, an annular sealing plug is arranged in the heat-insulating glue injection barrel, the annular sealing plug is connected with the upper fixing plate through the third cylinder, and the upper fixing plate is arranged above the workbench. The double-structure cone folding ring can be produced by the production device of the double-structure cone folding ring, so that the effects of stabilizing the cone structure, reinforcing the cone hanging edge and improving the toughness of the cone can be achieved, and the quality and the service life of a loudspeaker can be improved.
Description
[ field of technology ]
The invention relates to the technical field of loudspeaker cone ring-folding production devices, in particular to a production device of a double-structure cone ring-folding device.
[ background Art ]
Speakers are also known as "horns". Is a very common electroacoustic transducer device which can be seen in sounding electronic and electric equipment. The folding ring on the loudspeaker, also called hanging edge, is set for ensuring the axial movement of the cone along the loudspeaker and limiting the transverse movement, and plays a role in blocking the circulation of the cone. The prior cone folding ring is generally of a one-layer structure, so that the stability of the cone in the vibration process is poor, and particularly for an overweight bass loudspeaker, when the overweight bass loudspeaker works, because the high-strength vibration causes confusion and collision to form noise or damage the cone, the quality and the service life of the loudspeaker are influenced, therefore, the production device of the double-structure cone folding ring is required to be provided for producing the double-structure cone folding ring so as to achieve the purposes of stabilizing the cone structure, reinforcing the cone hanging edge and improving the cone toughness.
[ invention ]
The invention aims to overcome the defects of the prior art, and provides a production device of a double-structure cone-fold ring, which aims to solve the technical problems that a single-layer cone-fold ring has a lower stabilizing effect on a cone structure in the prior art, and particularly a super-bass loudspeaker is easy to form noise or damage a cone when working at super-bass.
In order to achieve the above purpose, the invention provides a production device of a double-structure cone-fold ring, which comprises a machine base, a workbench, an upper fixing plate, a production mold, a heat-preservation glue injection barrel, a first cylinder, a second cylinder and a third cylinder, wherein the workbench is arranged on the machine base, the production mold consists of a lower mold, a middle mold and an upper mold, the lower mold is fixedly embedded on the workbench, the middle mold is connected with the upper fixing plate through the first cylinder, the upper mold is connected with the upper fixing plate through the second cylinder, the workbench is provided with an annular heat-preservation glue injection barrel at the periphery of the lower mold, an annular sealing plug is arranged in the heat-preservation glue injection barrel, the annular sealing plug is connected with the upper fixing plate through the third cylinder, and the upper fixing plate is arranged above the workbench.
Preferably, the middle die is located between the lower die and the upper die, the lower die is provided with a downward convex inner annular groove, an outer annular groove is formed in the periphery of the inner annular groove, the inner annular groove is connected with the outer annular groove, the middle die and the upper die are of annular structures, the inner side of the bottom surface of the upper die is an upper waveform curved surface, the outer side of the bottom surface of the upper die is a plane matched with the outer annular groove, the lower surface of the middle die is a downward convex curved surface matched with the inner annular groove, the upper surface of the middle die is a downward waveform curved surface matched with the upper waveform curved surface, the middle die is fixedly connected with the telescopic rod heads of the first cylinders through a connecting plate, and the upper surface of the upper die is fixedly connected with the telescopic rod heads of the second cylinders.
Preferably, the outer annular groove and the plane form an annular total channel, a lower convex annular channel is formed between the inner annular groove and the lower convex cambered surface, the lower waveform cambered surface and the upper waveform cambered surface form a waveform channel, the waveform channel is positioned above the lower convex annular channel, the outer rings of the waveform channel and the lower convex annular channel are connected with the annular total channel, the inner rings of the waveform channel and the lower convex annular channel are of conical ring structures, and the annular total channel is connected with the inner cavity of the heat-insulation glue injection barrel through an annular glue conveying plate.
Preferably, the heat-insulating glue injection barrel is provided with a glue injection port, the glue injection port is provided with a leakage-proof plug, and the annular sealing plug is fixedly connected with the telescopic rod heads of the third cylinders.
Preferably, a motor is further installed in the machine base, the motor is further in transmission connection with a rotating shaft through a transmission mechanism, the rotating shaft is installed on the workbench and the lower die through a bearing, a fan-shaped cutter disc is further installed at the upper end of the rotating shaft, and in the cutting process, the outer edge of the cutter disc props against the inner face of the middle die.
Preferably, the transmission mechanism is a belt transmission mechanism.
Preferably, the workbench is further provided with a controller, the machine base is further provided with an air pump and an air storage tank, the air pump is connected with the air storage tank, the first air cylinder, the second air cylinder and the third air cylinder are respectively connected with the air storage tank through a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve, and the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are electrically connected with the controller.
Preferably, the controller is provided with a first switch, a second switch and a third switch for respectively controlling the start and stop of the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve.
The invention has the beneficial effects that: compared with the prior art, the production device of the double-structure cone ring provided by the invention has reasonable structure, the lower mold, the middle mold and the upper mold form the production mold for injecting glue, the lower mold, the middle mold and the upper mold can form the glue injection mold cavity only by controlling the lifting of the first cylinder and the second cylinder through operation on the controller, the rubber liquid of the heat-insulating glue injection barrel can be injected into the glue injection mold cavity through the annular glue delivery plate through operation on the controller by controlling the action of the third cylinder, after cooling and molding, the second cylinder and the first cylinder are sequentially controlled to rise through the controller, the molded ring-folding semi-finished product can be taken out, and then the edge cutting can be carried out to obtain the ring-folding finished product.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic structural view of a device for producing a dual-structure cone-folded ring according to an embodiment of the present invention;
FIG. 2 is a schematic view of the lower die according to the embodiment of the present invention;
FIG. 3 is a schematic view of the structure of a middle mold according to an embodiment of the present invention;
FIG. 4 is a schematic view of the upper die according to the embodiment of the present invention;
FIG. 5 is a schematic view of the structure of an annular glue delivery plate according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of connection between a thermal insulation glue injection barrel and a third cylinder according to an embodiment of the present invention;
fig. 7 is a partial enlarged view of a portion a in fig. 1.
[ detailed description ] of the invention
The present invention will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
Referring to fig. 1 to 6, the embodiment of the invention provides a production device of a double-structure cone-fold ring, which comprises a machine base 1, a workbench 2, an upper fixing plate 3, a production die 4, a heat-insulation glue injection barrel 5, a first air cylinder 6, a second air cylinder 7 and a third air cylinder 8, wherein the workbench 2 is arranged on the machine base 1, the production die 4 is composed of a lower die 41, a middle die 42 and an upper die 43, the lower die 41 is fixedly embedded on the workbench 2, the middle die 42 is connected with the upper fixing plate 3 through the first air cylinder 6, the upper die 43 is connected with the upper fixing plate 3 through the second air cylinder 7, the periphery of the lower die 41 is provided with an annular heat-insulation glue injection barrel 5, the heat-insulation glue injection barrel 5 is internally provided with an annular sealing plug 51, the annular sealing plug 51 is connected with the upper fixing plate 3 through the third air cylinder 8, and the upper fixing plate 3 is arranged above the workbench 2.
The middle die 42 is located between the lower die 41 and the upper die 43, the lower die 41 is provided with a downward convex inner annular groove 411, an outer annular groove 412 is formed in the periphery of the inner annular groove 411, the inner annular groove 411 is connected with the outer annular groove 412, the middle die 42 and the upper die 43 are both in annular structures, the inner side of the bottom surface of the upper die 43 is an upper wavy curved surface 431, the outer side of the bottom surface of the upper die 43 is a plane 432 matched with the outer annular groove 412, the lower surface of the middle die 42 is a downward convex curved surface 421 matched with the inner annular groove 411, the upper surface of the middle die 42 is a lower wavy curved surface 422 matched with the upper wavy curved surface 431, the middle die 42 is fixedly connected with the telescopic rod heads of the first cylinders 6 through a connecting plate 47, and the upper surface of the upper die 43 is fixedly connected with the telescopic rod heads of the second cylinders 7; the outer annular groove 412 and the plane 432 form an annular total channel 44, a lower convex annular channel 45 is formed between the inner annular groove 411 and the lower convex cambered surface 421, a lower waveform cambered surface 422 and an upper waveform cambered surface 431 form a waveform channel 46, the waveform channel 46 is positioned above the lower convex annular channel 45, the outer rings of the waveform channel 46 and the lower convex annular channel 45 are connected with the annular total channel 44, the inner rings of the waveform channel 46 and the lower convex annular channel 45 are in conical ring structures, and the annular total channel 44 is connected with the inner cavity of the heat preservation glue injection barrel 5 through an annular glue conveying plate 52.
In the embodiment of the invention, the inner side surface and the outer side surface of the annular glue delivery plate 52 are both provided with the sealing rings 16, and referring to fig. 7, the sealing ring 16 is used for realizing the sealing connection between the annular glue delivery plate 52 and the lower die 41 and the upper die 43 in the glue injection process, so as to realize the sealing of the glue injection port of the annular total channel 44 during glue injection.
Further, the heat-insulation glue injection barrel 5 is provided with a glue injection port 53, the glue injection port 53 is provided with a leakage-proof plug 54, and the annular sealing plug 51 is fixedly connected with the telescopic rod heads of the third cylinders 8.
Further, a motor 9 is further installed in the machine base 1, the motor 9 is further in transmission connection with a rotating shaft 11 through a transmission mechanism 10, the rotating shaft 11 is installed on the workbench 2 and the lower die 41 through a bearing, a fan-shaped cutter head 12 is further installed at the upper end of the rotating shaft 11, and in the cutting process, the outer edge of the cutter head 12 butts against the inner face of the middle die 42, and the transmission mechanism 10 is a belt transmission mechanism.
Further, a controller 13 is further disposed on the workbench 2, an air pump 14 and an air storage tank 15 are further disposed in the machine base 1, the air pump 14 is connected with the air storage tank 15, the first air cylinder 6, the second air cylinder 7 and the third air cylinder 8 are respectively connected with the air storage tank 15 through a first electromagnetic valve 61, a second electromagnetic valve 71 and a third electromagnetic valve 81, the first electromagnetic valve 61, the second electromagnetic valve 71 and the third electromagnetic valve 81 are respectively and electrically connected with the controller 13, and the controller 13 is provided with a first switch, a second switch and a third switch which are respectively used for controlling the first electromagnetic valve 61, the second electromagnetic valve 71 and the third electromagnetic valve 81 to be started and stopped.
The working process of the invention comprises the following steps:
in the working process of the production device of the double-structure cone-folded ring, a first switch on the controller 13 is sequentially pressed, the first air cylinder 6 is controlled to descend through the first electromagnetic valve 61, the middle mold 42 is driven to descend, when the first air cylinder 6 descends to the proper position, the second switch is pressed, the second air cylinder 7 is controlled to descend through the second electromagnetic valve 71, the upper mold 43 is driven to descend, when the second air cylinder 7 descends to the proper position, the lower mold 41, the middle mold 42 and the upper mold 43 form a glue injection mold cavity formed by the annular main channel 44, the lower convex annular channel 45 and the waveform channel 46, then a third switch on the controller 13 is pressed, the third air cylinder 8 is driven to act through the third electromagnetic valve 81, the annular sealing plug 51 is pushed by the telescopic rod of the third air cylinder 8, and then the rubber liquid in the heat-insulating glue injection barrel 5 is pushed, the rubber liquid is output from the annular rubber conveying plate 52 into the annular total channel 44 and flows into the lower convex annular channel 45 and the waveform channel 46, after cooling and molding, the second air cylinder 7 is controlled to reset through the second switch on the controller 13, then the first air cylinder 6 is controlled to reset through pressing the first switch, as the rubber is soft, the first air cylinder 6 can not cause destructive influence on the molded waveform ring in the process of resetting the middle mold 42, the middle mold 42 can be prevented from being brought out of the ring, the ring can be manually taken out of the middle mold 42, part of the rubber liquid flows out from the opening in the process of injecting the rubber, the residual edge at the opening of the lower convex annular channel 45 can be subjected to trimming treatment through the sector cutter 12, the action of the sector cutter 12 is realized by driving the rotating shaft 11 to rotate through the transmission mechanism 10 by the motor 9, and the sector cutter 12 is driven to rotate by the rotating shaft 11.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The utility model provides a double construction cone rolls over apparatus for producing of ring which characterized in that: including frame (1), workstation (2), last fixed plate (3), production mould (4), heat preservation injecting glue bucket (5), first cylinder (6), second cylinder (7) and third cylinder (8), workstation (2) set up on frame (1), production mould (4) constitute by lower mould (41), well mould (42) and last mould (43), lower mould (41) fixed inlay dress on workstation (2), well mould (42) be connected with last fixed plate (3) through first cylinder (6), last mould (43) be connected with last fixed plate (3) through second cylinder (7), the periphery of workstation (2) at lower mould (41) be provided with annular heat preservation injecting glue bucket (5), heat preservation injecting glue bucket (5) in be provided with annular sealing plug (51), annular sealing plug (51) be connected with last fixed plate (3) through third cylinder (8), last fixed plate (3) set up on lower mould (2) and set up annular groove (411) between lower mould (41) and lower mould (41), the inner annular groove (411) is connected with the outer annular groove (412), the middle die (42) and the upper die (43) are in annular structures, the inner side of the bottom surface of the upper die (43) is an upper waveform curved surface (431), the outer side of the bottom surface of the upper die is a plane (432) matched with the outer annular groove (412), the lower surface of the middle die (42) is a lower waveform curved surface (421) matched with the inner annular groove (411), the upper surface of the middle die is a lower waveform curved surface (422) matched with the upper waveform curved surface (431), the middle die (42) is fixedly connected with the telescopic rod heads of the first cylinder (6) through a connecting plate (47), the upper surface of the upper die (43) is fixedly connected with the telescopic rod heads of a plurality of second cylinders (7), the outer annular groove (412) and the plane (432) form an annular total channel (44), a lower waveform curved surface (422) and the upper waveform curved surface (431) form a lower waveform curved surface (46), the lower waveform curved surface (422) and the upper waveform curved surface (431) form a channel (46), the lower waveform channel (46) is fixedly connected with the annular channel (46) and the annular channel (45) and the annular total channel (45), the novel plastic injection machine is characterized in that the annular main channel (44) is connected with the inner cavity of the heat-preservation plastic injection barrel (5) through an annular plastic conveying plate (52), a motor (9) is further installed in the machine base (1), the motor (9) is further in transmission connection with the rotating shaft (11) through a transmission mechanism (10), the rotating shaft (11) is installed on the workbench (2) and the lower die (41) through a bearing, a fan-shaped cutter disc (12) is further installed at the upper end of the rotating shaft (11), and in the cutting process, the outer edge of the cutter disc (12) props against the inner face of the middle die (42).
2. The apparatus for producing of a double-structure cone ring as defined in claim 1, wherein: the heat preservation glue injection barrel (5) is provided with a glue injection port (53), the glue injection port (53) is provided with a leakage-proof plug (54), and the annular sealing plug (51) is fixedly connected with the telescopic rod heads of the third cylinders (8).
3. The apparatus for producing of a double-structure cone ring as defined in claim 1, wherein: the transmission mechanism (10) is a belt transmission mechanism.
4. The apparatus for producing of a double-structure cone ring as defined in claim 1, wherein: the workbench (2) on still set up a controller (13), frame (1) in still be provided with air pump (14) and gas holder (15), air pump (14) be connected with gas holder (15), first cylinder (6), second cylinder (7) and third cylinder (8) be connected with gas holder (15) through first solenoid valve (61), second solenoid valve (71) and third solenoid valve (81) respectively, first solenoid valve (61), second solenoid valve (71) and third solenoid valve (81) all with controller (13) electric connection.
5. The apparatus for producing of a double-structure cone ring as defined in claim 4, wherein: the controller (13) is provided with a first switch, a second switch and a third switch which are used for respectively controlling the start and stop of the first electromagnetic valve (61), the second electromagnetic valve (71) and the third electromagnetic valve (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890945.9A CN107454550B (en) | 2017-09-27 | 2017-09-27 | Production device for double-structure cone folding ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890945.9A CN107454550B (en) | 2017-09-27 | 2017-09-27 | Production device for double-structure cone folding ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107454550A CN107454550A (en) | 2017-12-08 |
| CN107454550B true CN107454550B (en) | 2023-09-05 |
Family
ID=60498198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710890945.9A Active CN107454550B (en) | 2017-09-27 | 2017-09-27 | Production device for double-structure cone folding ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107454550B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993023966A1 (en) * | 1992-05-14 | 1993-11-25 | Yocum Fred D | Loudspeaker cone suspension rim having integral gasket |
| US5319718A (en) * | 1991-10-11 | 1994-06-07 | Yocum Fred D | Loudspeaker cone and method for making same |
| CN101568052A (en) * | 2008-04-24 | 2009-10-28 | 横店集团浙江英洛华电声有限公司 | Flat plane speaker with double corrugated rims on vibrating diaphragm |
| CN202979271U (en) * | 2012-09-20 | 2013-06-05 | 深圳市得辉达科技有限公司 | Double-flange loudspeaker |
| CN104754477A (en) * | 2015-03-23 | 2015-07-01 | 歌尔声学股份有限公司 | Loudspeaker |
| WO2015116000A1 (en) * | 2014-01-28 | 2015-08-06 | Tgi Technology Private Limited | Acoustic structure with passive diaphragm |
| CN204887476U (en) * | 2015-07-17 | 2015-12-16 | 广州市花都区德胜扬声器配件厂 | Sound basin one shot forming of group punching machine |
| CN106954146A (en) * | 2017-05-16 | 2017-07-14 | 深圳精拓创新科技有限公司 | Silica gel vibrating diaphragm package assembly and preparation method for loudspeaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100166249A1 (en) * | 2008-12-30 | 2010-07-01 | Hi-Tech Sound System Co., Ltd. | Dual loop speaker |
-
2017
- 2017-09-27 CN CN201710890945.9A patent/CN107454550B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319718A (en) * | 1991-10-11 | 1994-06-07 | Yocum Fred D | Loudspeaker cone and method for making same |
| WO1993023966A1 (en) * | 1992-05-14 | 1993-11-25 | Yocum Fred D | Loudspeaker cone suspension rim having integral gasket |
| CN101568052A (en) * | 2008-04-24 | 2009-10-28 | 横店集团浙江英洛华电声有限公司 | Flat plane speaker with double corrugated rims on vibrating diaphragm |
| CN202979271U (en) * | 2012-09-20 | 2013-06-05 | 深圳市得辉达科技有限公司 | Double-flange loudspeaker |
| WO2015116000A1 (en) * | 2014-01-28 | 2015-08-06 | Tgi Technology Private Limited | Acoustic structure with passive diaphragm |
| CN104754477A (en) * | 2015-03-23 | 2015-07-01 | 歌尔声学股份有限公司 | Loudspeaker |
| WO2016150179A1 (en) * | 2015-03-23 | 2016-09-29 | 歌尔声学股份有限公司 | Loudspeaker |
| CN204887476U (en) * | 2015-07-17 | 2015-12-16 | 广州市花都区德胜扬声器配件厂 | Sound basin one shot forming of group punching machine |
| CN106954146A (en) * | 2017-05-16 | 2017-07-14 | 深圳精拓创新科技有限公司 | Silica gel vibrating diaphragm package assembly and preparation method for loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107454550A (en) | 2017-12-08 |
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