CN201222802Y - Coaxial horn for earphone - Google Patents
Coaxial horn for earphone Download PDFInfo
- Publication number
- CN201222802Y CN201222802Y CNU2008201138057U CN200820113805U CN201222802Y CN 201222802 Y CN201222802 Y CN 201222802Y CN U2008201138057 U CNU2008201138057 U CN U2008201138057U CN 200820113805 U CN200820113805 U CN 200820113805U CN 201222802 Y CN201222802 Y CN 201222802Y
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- earphone
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Abstract
The utility model relates to a coaxial horn of an earphone, which comprises a base, big round iron, big magnet, a big washer, a big voice coil, a big vibration diaphragm, a printed circuit board, small magnet, a small washer, first small round iron, a small voice coil, second small round iron and a small vibration diaphragm. The coaxial horn of the earphone leads a single earphone horn to respectively make alt and supper bass to produce excellent sound effects, leads the earphone which makes the alt and supper bass to save the number and the cost for assembling the horn of the earphone, and can reduce the space which is needed to be used by the inner portion of the earphone.
Description
Technical field
The utility model is relevant earphone, the especially relevant earphone horn structure that can export alt, supper bass in the earphone respectively that is assembled in.
Background technology
Cell phone, DVD player etc. have the portable electronic equipment of voice output function, can listen to function so that the preferable voice of user to be provided in conjunction with earphone greatly.
Dispose a plurality of loudspeaker in some earphone, make alt, supper bass respectively by different loudspeaker output, to obtain preferable voice output effect, the multi-sound-channel earphone that discloses of No. the 200729999th, TaiWan, China publication for example, include two headphone units, be disposed at user's ears respectively, each headphone unit all includes: a housing, can cover fully and cover ear; One center loudspeaker is located in the middle of the housing, the position of corresponding ear; One preposition loud speaker is located in the housing, corresponding to the place ahead of ear; One rearmounted loud speaker is located in the housing, corresponding to the rear of ear; One subwoofer is located in the middle of the housing.
The enclosure interior of above-mentioned multi-sound-channel earphone must possess bigger space is arranged, and could assemble a plurality of independently loud speakers in housing, and spends the time of assembling in conjunction with most loud speakers.
The compound coaxial magnetic return horn structure that the TaiWan, China patent discloses for No. 540928 comprises: a bracing frame, the place ahead are established and are enlarged mouth, and the right position, rear is glutinous for establishing an elastic wave sheet and voice coil loudspeaker voice coil cover; One magnetic returns, and supports being connected with on bracing frame with cylinder, and the both sides that this magnetic returns all offer and hold moving gap; One first voice coil loudspeaker voice coil is configured in magnetic and returns in the moving gap of appearance on one side; One second voice coil loudspeaker voice coil is configured in magnetic and returns in the moving gap of appearance of another side; One first vibrating diaphragm, upward its internal diameter is glutinous mutually with first voice coil loudspeaker voice coil to place bracing frame to enlarge mouth; And one second vibrating diaphragm, it is glutinous mutually with second voice coil loudspeaker voice coil to place magnetic to return its internal diameter; Make magnetic Hui Keteng be located at bracing frame the place ahead, the utility structure person of two kinds of high bass outputs of difference can be provided simultaneously with monomer structure.But the large-scale loudspeaker that above-mentioned horn structure is general sound equipment to be used can't be assembled in the general little earphone.
The utility model content
The purpose of this utility model is to provide a kind of coaxial horn of earphone, with the loudspeaker of further improvement earphone, makes single earphone horn can send alt, supper bass respectively.
For achieving the above object, the coaxial horn of the earphone that the utility model provides, it comprises:
One pedestal is provided with one first accommodation space;
One big round iron is provided with one second accommodation space; This big round iron places in this first accommodation space;
One big magnet is positioned over this second accommodation space;
One big washer places the upper end of this big magnet;
One big voice coil loudspeaker voice coil, the movable periphery that is socketed on this big washer; This big voice coil loudspeaker voice coil is provided with first group of lead;
One big vibrating membrane in conjunction with this big voice coil loudspeaker voice coil, places the upper end of this big voice coil loudspeaker voice coil; The centre of this big vibrating membrane is provided with a through hole; The periphery of this big vibrating membrane places the upper end of this pedestal;
One printed circuit board (PCB) is provided with one first group of electric connecting terminal and one second group of electric connecting terminal; This printed circuit board (PCB) is in conjunction with this pedestal; This first group of lead is electrically connected this first group of electric connecting terminal;
One first little round iron is provided with one the 3rd accommodation space; The aperture of this through hole is greater than the diameter of this first little round iron; This first little round iron is repeatedly in the upper end of this big washer;
One small magnet places in the 3rd accommodation space;
One little washer places the upper end of this small magnet;
One little voice coil loudspeaker voice coil, the movable periphery that is socketed on this little washer; This little voice coil loudspeaker voice coil is provided with one second group of lead; This second group of lead is electrically connected this second group of electric connecting terminal;
One second little round iron is provided with hollow bulb in the middle of it; This first little round iron of the lower end socket of this second little round iron;
One small vibration film places in this hollow bulb; This small vibration film places the upper end of this little voice coil loudspeaker voice coil in conjunction with this little voice coil loudspeaker voice coil.
The coaxial horn of described earphone, wherein this pedestal is provided with one first diapire and one first ring wall; This first diapire and this first ring wall surround this first accommodation space; The upper surface of this first diapire is provided with one first groove; The bottom of this big round iron places this first groove.
The coaxial horn of described earphone, wherein the lower surface of this first diapire is provided with one second groove; This printed circuit board (PCB) places in this second groove.
The coaxial horn of described earphone, wherein the periphery of this first diapire is provided with most sound holes.
The coaxial horn of described earphone, wherein this big round iron is provided with one second diapire and one second ring wall; This second diapire and this second ring wall surround this second accommodation space; The upper surface of this second diapire is provided with one the 3rd groove; The bottom of this big magnet places the 3rd groove.
The coaxial horn of described earphone, wherein the upper end of this first ring wall is provided with a circular rabbet in addition; The periphery of this this big vibrating membrane of circular rabbet socket.
The coaxial horn of described earphone, wherein the upper end of this first ring wall is provided with one and lacks the hole, and the periphery of this first ring wall is provided with one and extends to the groove of this diapire periphery by this scarce hole; This first group of lead places the below of this big vibrating membrane, passes this scarce hole and places this groove to extend to this printed circuit board (PCB).
The coaxial horn of described earphone, wherein this pedestal, this big round iron, this big magnet, this big washer, this first little round iron, this small magnet and this little washer are respectively equipped with one first through hole, one second through hole, one the 3rd through hole, one the 4th through hole, one the 5th through hole, one the 6th through hole and one the 7th through hole; This second group of lead passes the 7th through hole, the 6th through hole, the 5th through hole, the 4th through hole, the 3rd through hole, this second through hole and this first through hole respectively and extends to this printed circuit board (PCB).
The coaxial horn of described earphone, wherein the periphery of this big washer is provided with to the protruding Vela of ring shape that sink; This first little round iron is provided with one the 3rd diapire and one the 3rd ring wall; The 3rd diapire and the 3rd ring wall surround the 3rd accommodation space; The centre of the 3rd diapire is provided with the 5th through hole; The bottom of this first little round iron is provided with a bulge loop that places the protruding Vela of this ring shape upper end.
The coaxial horn of described earphone, wherein this second little round iron is provided with to the outstanding ring-type fin of this hollow bulb; The periphery of this small vibration film repeatedly places the upper end of this ring-type fin; This ring-type fin places the upper end of this first little round iron.
The coaxial horn of described earphone, wherein this second little round iron is provided with to the outstanding ring-type fin of this hollow bulb; The periphery of this small vibration film repeatedly places the upper end of this ring-type fin; This ring-type fin places the upper end of this first little round iron.
Effect of the present utility model is:
1) coaxial horn of earphone of the present utility model enables to send the earphone of alt, supper bass, can save the quantity and the cost of assembling earphone horn, and can reduce the earphone volume inside.
2) coaxial horn of earphone of the present utility model can make earphone horn produce preferable acoustics.
Description of drawings
Fig. 1 is the decomposing schematic representation of the coaxial horn of the utility model earphone.
Fig. 2 is the schematic appearance of the coaxial horn of earphone of the present utility model.
Fig. 3 is the schematic top plan view of the coaxial horn of earphone of the present utility model.
Fig. 4 is the schematic side view of the coaxial horn of earphone of the present utility model.
Fig. 5 is the generalized section of the coaxial horn of earphone of the present utility model along the A-A line among Fig. 4.
Primary clustering symbol description in the accompanying drawing:
111 first diapires, 112 first ring walls, 1120 circular rabbets
113 first accommodation spaces, 114 first through holes
115 sound holes, 116 first grooves
117 second grooves 118 lack the hole
119 grooves, 12 big round iron
121 second diapires, 122 second ring walls
123 second accommodation spaces, 124 second through holes
125 the 3rd grooves, 13 big magnet
131 the 3rd through holes, 14 big washers
141 the 4th through holes, 142 Huan Zhuan Tu Vela
151 first groups of leads of 15 big voice coil loudspeaker voice coils
16 big vibrating membrane 161 through holes
171 first groups of electric connecting terminals of 17 printed circuit board (PCB)s
172 second groups of electric connecting terminal 21 first little round iron
211 the 3rd diapires 212 the 3rd ring wall
213 the 3rd accommodation spaces 214 the 5th through hole
215 bulge loops, 22 small magnets
221 the 6th through holes, 23 little washers
231 the 7th through holes, 24 little voice coil loudspeaker voice coils
241 second groups of line 25 second little round iron
251 hollow bulbs, 252 ring-type fins
26 small vibration films, 31 first gaps
32 second gaps, 33 third spaces
Embodiment
Other purpose of the present utility model, effect see also drawings and Examples, are described in detail as follows.
Please join Fig. 1 to shown in Figure 5.The utlity model has the embodiment of the coaxial horn 1 of earphone, comprise that pedestal 11, big round iron 12, big magnet 13, big washer (washer) 14, big voice coil loudspeaker voice coil 15, big vibrating membrane 16, printed circuit board (PCB) 17, the first roundlet iron 21, small magnet 22, little washer 23, little voice coil loudspeaker voice coil 24, the second roundlet iron 25 and small vibration film 26 form.
Big round iron 12 is provided with one second diapire 121 and one second ring wall 122; Second diapire 121 and second ring wall 122 surround second accommodation space 123; The centre of second diapire 121 is provided with one second through hole 124; The upper surface of second diapire 121 is provided with one the 3rd groove 125.Shown in Fig. 1,5, big round iron 12 is placed in first accommodation space 113, and second diapire 121 is placed in first groove 116; Has one first gap 31 between first ring wall 112 and second ring wall 122.
Shown in Fig. 1,5, big magnet 13 is placed in second accommodation space 123, and the bottom of big magnet 13 is placed in the 3rd groove 125, and the centre of big magnet 13 is provided with one the 3rd through hole 131.The centre of big washer 14 is provided with one the 4th through hole 141, and the periphery of big washer 14 is provided with to the protruding Vela 142 of ring shape that sink.The external diameter of big washer 14 is greater than big magnet 13, and big washer 14 coheres the upper end that big magnet 13 places big magnet 13; The external diameter of big washer 14, big magnet 13 has second gap 32 less than the internal diameter of second ring wall 122 between the periphery of therefore big washer 14 and big magnet 13 and second ring wall 122.
Shown in Fig. 1,5, big voice coil loudspeaker voice coil 15 places second gap 32, the movable periphery that is socketed on big magnet 13 and big washer 14.Big voice coil loudspeaker voice coil 15 is provided with the first group of lead 151 that is electrically connected circuit board 17.Big vibrating membrane 16 is provided with a through hole 161, the periphery of the big washer 14 of through hole 161 sockets in order to send supper bass in the middle of it; Big vibrating membrane 16 coheres the upper end that big voice coil loudspeaker voice coil 15 places big voice coil loudspeaker voice coil 15.The periphery of circular rabbet 1120 sockets of first ring wall, 112 upper ends and the big vibrating membrane 16 of combination.
Shown in Fig. 1,3,5, printed circuit board (PCB) 17 is provided with the required circuit structure of earphone horn, and has first group of electric connecting terminal 171 and second group of electric connecting terminal 172.Printed circuit board (PCB) 17 places in second groove 117 in conjunction with the lower surface of diapire 111.
Shown in Fig. 1,5, the first roundlet iron 21 is provided with one the 3rd diapire 211 and one the 3rd ring wall 212; The 3rd diapire 211 and one the 3rd ring wall 212 surround the 3rd accommodation space 213; The centre of the 3rd diapire 211 is provided with one the 5th through hole 214; The first roundlet iron 21 repeatedly in big washer 14 the upper end and the bottom of the first roundlet iron 21 be provided with the bulge loop 215 that places Huan Zhuan Tu Vela 142 upper ends.The central authorities of small magnet 22 are provided with one the 6th through hole 221; Small magnet 22 places in the 3rd accommodation space 213, repeatedly places the upper end of the 3rd diapire 211.The central authorities of little washer 23 are provided with one the 7th through hole 231, and little washer 23 coheres the upper end that small magnet 22 places small magnet 22.Therefore the internal diameter of the 3rd ring wall 212 of the first roundlet iron 21 has third space 33 between the periphery of the first roundlet iron 21 and small magnet 22 and little washer 23 greater than small magnet 22 and little washer 23.
Shown in Fig. 1,5, little voice coil loudspeaker voice coil 24 places third space 33, the movable periphery that is socketed on little washer 23.Little voice coil loudspeaker voice coil 24 is provided with the second group of lead 241 that is electrically connected circuit board 17.The centre of the second roundlet iron 25 is provided with hollow bulb 251, and is provided with the ring-type fin of giving prominence to hollow bulb 251 252.The lower end socket first roundlet iron 21 the 3rd ring wall 212 of the second roundlet iron 25, ring-type fin 252 places the upper end of the 3rd ring wall 212 of the first roundlet iron 21.Small vibration film 26 places in the hollow bulb 251 in conjunction with the second roundlet iron 25 in order to send alt, and the periphery of small vibration film 26 repeatedly places the upper end of ring-type fin 252.Small vibration film 26 coheres the upper end that little voice coil loudspeaker voice coil 24 places little voice coil loudspeaker voice coil 24 in addition.
Shown in Fig. 1,2,3,4,5, first group of lead 151 places the below of big vibrating membrane 16, passes scarce hole 118 and places groove 119 to extend to printed circuit board (PCB) 17, and be electrically connected first group of electric connecting terminal 171.Second group of lead 241 passes the 7th through hole 231, the 6th through hole 221, the 5th through hole 211, the 4th through hole 141, the 3rd through hole 131, second through hole 124 and first through hole 114 in regular turn and extends to printed circuit board (PCB) 17, and be electrically connected second group of electric connecting terminal 172, as shown in Figure 3.
By most sound holes 115 of first diapire 111, make the spatial communication of first accommodation space 113 and pedestal 11 outsides, can promote the effect that produces heavy bottom when big vibrating membrane 16 vibrates.
The coaxial horn of earphone of the present utility model is not to be used for the large-scale compound coaxial magnetic return horn structure that general sound equipment is used described in the background technology, therefore can be assembled in the general little earphone, make single earphone horn can send alt, supper bass respectively and produce preferable acoustics, and enable to send the earphone of alt, supper bass, the quantity and the cost of assembling earphone horn can be saved, and the earphone volume inside can be reduced.
The above record, only for utilizing the embodiment of the utility model technology contents, modification, variation that those skilled in the art use the utility model to do all belong to the claim scope that the utility model is advocated, and are not limited to the content that embodiment discloses.
Claims (11)
1, a kind of coaxial horn of earphone is characterized in that, comprising:
One pedestal is provided with one first accommodation space;
One big round iron is provided with one second accommodation space; This big round iron places in this first accommodation space;
One big magnet is positioned over this second accommodation space;
One big washer places the upper end of this big magnet;
One big voice coil loudspeaker voice coil, the movable periphery that is socketed on this big washer; This big voice coil loudspeaker voice coil is provided with first group of lead;
One big vibrating membrane in conjunction with this big voice coil loudspeaker voice coil, places the upper end of this big voice coil loudspeaker voice coil; The centre of this big vibrating membrane is provided with a through hole; The periphery of this big vibrating membrane places the upper end of this pedestal;
One printed circuit board (PCB) is provided with one first group of electric connecting terminal and one second group of electric connecting terminal; This printed circuit board (PCB) is in conjunction with this pedestal; This first group of lead is electrically connected this first group of electric connecting terminal;
One first little round iron is provided with one the 3rd accommodation space; The aperture of this through hole is greater than the diameter of this first little round iron; This first little round iron is repeatedly in the upper end of this big washer;
One small magnet places in the 3rd accommodation space;
One little washer places the upper end of this small magnet;
One little voice coil loudspeaker voice coil, the movable periphery that is socketed on this little washer; This little voice coil loudspeaker voice coil is provided with one second group of lead; This second group of lead is electrically connected this second group of electric connecting terminal;
One second little round iron is provided with hollow bulb in the middle of it; This first little round iron of the lower end socket of this second little round iron;
One small vibration film places in this hollow bulb; This small vibration film places the upper end of this little voice coil loudspeaker voice coil in conjunction with this little voice coil loudspeaker voice coil.
2, the coaxial horn of earphone as claimed in claim 1 is characterized in that, wherein this pedestal is provided with one first diapire and one first ring wall; This first diapire and this first ring wall surround this first accommodation space; The upper surface of this first diapire is provided with one first groove; The bottom of this big round iron places this first groove.
3, the coaxial horn of earphone as claimed in claim 2 is characterized in that, wherein the lower surface of this first diapire is provided with one second groove; This printed circuit board (PCB) places in this second groove.
4, the coaxial horn of earphone as claimed in claim 3 is characterized in that, wherein the periphery of this first diapire is provided with most sound holes.
5, the coaxial horn of earphone as claimed in claim 4 is characterized in that, wherein this big round iron is provided with one second diapire and one second ring wall; This second diapire and this second ring wall surround this second accommodation space; The upper surface of this second diapire is provided with one the 3rd groove; The bottom of this big magnet places the 3rd groove.
6, the coaxial horn of earphone as claimed in claim 5 is characterized in that, wherein the upper end of this first ring wall is provided with a circular rabbet in addition; The periphery of this this big vibrating membrane of circular rabbet socket.
7, the coaxial horn of earphone as claimed in claim 6 is characterized in that, wherein the upper end of this first ring wall is provided with one and lacks the hole, and the periphery of this first ring wall is provided with one and extends to the groove of this diapire periphery by this scarce hole; This first group of lead places the below of this big vibrating membrane, passes this scarce hole and places this groove to extend to this printed circuit board (PCB).
8, the coaxial horn of earphone as claimed in claim 7, it is characterized in that wherein this pedestal, this big round iron, this big magnet, this big washer, this first little round iron, this small magnet and this little washer are respectively equipped with one first through hole, one second through hole, one the 3rd through hole, one the 4th through hole, one the 5th through hole, one the 6th through hole and one the 7th through hole; This second group of lead passes the 7th through hole, the 6th through hole, the 5th through hole, the 4th through hole, the 3rd through hole, this second through hole and this first through hole respectively and extends to this printed circuit board (PCB).
As the coaxial horn of each described earphone of claim 1 to 8, it is characterized in that 9, wherein the periphery of this big washer is provided with to the protruding Vela of ring shape that sink; This first little round iron is provided with one the 3rd diapire and one the 3rd ring wall; The 3rd diapire and the 3rd ring wall surround the 3rd accommodation space; The centre of the 3rd diapire is provided with the 5th through hole; The bottom of this first little round iron is provided with a bulge loop that places the protruding Vela of this ring shape upper end.
As the coaxial horn of each described earphone of claim 1 to 8, it is characterized in that 10, wherein this second little round iron is provided with to the outstanding ring-type fin of this hollow bulb; The periphery of this small vibration film repeatedly places the upper end of this ring-type fin; This ring-type fin places the upper end of this first little round iron.
11, the coaxial horn of earphone as claimed in claim 9 is characterized in that, wherein this second little round iron is provided with to the outstanding ring-type fin of this hollow bulb; The periphery of this small vibration film repeatedly places the upper end of this ring-type fin; This ring-type fin places the upper end of this first little round iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201138057U CN201222802Y (en) | 2008-07-01 | 2008-07-01 | Coaxial horn for earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201138057U CN201222802Y (en) | 2008-07-01 | 2008-07-01 | Coaxial horn for earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222802Y true CN201222802Y (en) | 2009-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201138057U Expired - Fee Related CN201222802Y (en) | 2008-07-01 | 2008-07-01 | Coaxial horn for earphone |
Country Status (1)
| Country | Link |
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| CN (1) | CN201222802Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527873A (en) * | 2009-04-22 | 2009-09-09 | 中山奥凯华泰电子有限公司 | Earphone |
| CN102333259A (en) * | 2011-07-14 | 2012-01-25 | 瑞声声学科技(深圳)有限公司 | Earphone |
| CN104811839A (en) * | 2015-02-16 | 2015-07-29 | 深圳市冠旭电子有限公司 | Double-loudspeaker head-wearing earphone |
| CN104918165A (en) * | 2015-06-30 | 2015-09-16 | 常州市科宏电子电器有限公司 | Novel earphone |
| CN106714071A (en) * | 2017-02-11 | 2017-05-24 | 中山市天键通讯技术有限公司 | Concentric assembly method for earphone magnetic circuit component |
| CN107147978A (en) * | 2017-05-25 | 2017-09-08 | 东莞合律美电子科技有限公司 | One kind frequency dividing loudspeaker |
| CN107172546A (en) * | 2017-05-25 | 2017-09-15 | 东莞合律美电子科技有限公司 | A kind of earphone for dividing loudspeaker |
| CN108366322A (en) * | 2017-04-21 | 2018-08-03 | 朝阳聚声泰（信丰）科技有限公司 | Double magnetic circuit two-tone film loudspeaker |
| CN112470488A (en) * | 2018-05-04 | 2021-03-09 | A·里奇 | Electroacoustic ear muff for open earphone |
| WO2024045235A1 (en) * | 2022-08-30 | 2024-03-07 | 瑞声光电科技(常州)有限公司 | Sound production device |
-
2008
- 2008-07-01 CN CNU2008201138057U patent/CN201222802Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527873A (en) * | 2009-04-22 | 2009-09-09 | 中山奥凯华泰电子有限公司 | Earphone |
| CN102333259A (en) * | 2011-07-14 | 2012-01-25 | 瑞声声学科技(深圳)有限公司 | Earphone |
| CN104811839B (en) * | 2015-02-16 | 2018-08-17 | 深圳市冠旭电子股份有限公司 | Double horn headphone |
| CN104811839A (en) * | 2015-02-16 | 2015-07-29 | 深圳市冠旭电子有限公司 | Double-loudspeaker head-wearing earphone |
| CN104918165A (en) * | 2015-06-30 | 2015-09-16 | 常州市科宏电子电器有限公司 | Novel earphone |
| CN106714071B (en) * | 2017-02-11 | 2019-04-26 | 中山市天键通讯技术有限公司 | The concentric assemble method of earphone magnetic circuit component |
| CN106714071A (en) * | 2017-02-11 | 2017-05-24 | 中山市天键通讯技术有限公司 | Concentric assembly method for earphone magnetic circuit component |
| CN108366322A (en) * | 2017-04-21 | 2018-08-03 | 朝阳聚声泰（信丰）科技有限公司 | Double magnetic circuit two-tone film loudspeaker |
| CN107172546A (en) * | 2017-05-25 | 2017-09-15 | 东莞合律美电子科技有限公司 | A kind of earphone for dividing loudspeaker |
| CN107147978A (en) * | 2017-05-25 | 2017-09-08 | 东莞合律美电子科技有限公司 | One kind frequency dividing loudspeaker |
| CN112470488A (en) * | 2018-05-04 | 2021-03-09 | A·里奇 | Electroacoustic ear muff for open earphone |
| CN112470488B (en) * | 2018-05-04 | 2023-09-15 | A·里奇 | Electroacoustic earmuffs for open headphones |
| WO2024045235A1 (en) * | 2022-08-30 | 2024-03-07 | 瑞声光电科技(常州)有限公司 | Sound production device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20100701 |