CN201153323Y - Micro moving-coil type electro-acoustic conversion device - Google Patents
Micro moving-coil type electro-acoustic conversion device Download PDFInfo
- Publication number
- CN201153323Y CN201153323Y CNU200820017172XU CN200820017172U CN201153323Y CN 201153323 Y CN201153323 Y CN 201153323Y CN U200820017172X U CNU200820017172X U CN U200820017172XU CN 200820017172 U CN200820017172 U CN 200820017172U CN 201153323 Y CN201153323 Y CN 201153323Y
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- basin frame
- magnet
- bar shaped
- voice coil
- magnetic circuit
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Abstract
The utility model discloses a micro moving-coil electroacoustic transducer which comprises a magnetic circuit device, a rapping device, and a shell for fixing and connecting the magnetic circuit device and the rapping device, wherein, the magnetic circuit device comprises a rectangular basin frame, a bar magnet arranged on the basin frame and a washer arranged on the bar magnet, and the basin frame, the bar magnet, and the washer form two strip-shaped magnet gaps; the rapping device comprises a long and narrow vibration film, a long and narrow frame speech coil is arranged on the vibration film, and two symmetrical edges of the speech coil are positioned in the magnetic gap of the magnetic circuit device; the shell is a long and narrow frame shell, the middle part of an opening below the shell is sealed by the basin frame, and two free ends of the basin frame and the inner lateral wall of the shell form an acoustic hole. The micro moving-coil electroacoustic transducer has simple fabrication process, facilitates the automatic production, has lower part manufacturing cost and good acoustical properties, and can be applied to various magnetic circuit structures.
Description
Technical field
The utility model relates to a kind of electroacoustic transducer.
Background technology
In recent years, develop rapidly along with electronic product markets such as mobile phone, notebook computers, the miniature moving-coil type electroacoustic transducer of cost performance excellence (generally comprising receiver and loud speaker) is widely used, the applied part of this electronic product requires product size to dwindle and do not sacrifice properties of product gradually, for micro-telephone receiver and loud speaker, require its size to reduce equally, and output volume and tonequality do not change even require better.For this reason, the someone has designed a kind of Microspeaker of microscler magnetic circuit, utilizes a middle part projection, smooth yoke all around, and both sides install two bar magnets and two strip washers form magnetic circuit devices.Showed cutaway view on this product long axis direction as accompanying drawing 7, accompanying drawing 8 has showed the cutaway view on this product short-axis direction.Middle part projection, smooth yoke 1 all around, both sides install two bar magnets 2 and two strip washers 3 form magnetic circuit devices; Vibrating diaphragm 5 and voice coil loudspeaker voice coil 6 form vibrating device, and voice coil loudspeaker voice coil 6 places in the magnetic gap of magnetic circuit device; Plastic casing 4 combines magnetic circuit device and vibrating device; In order to guarantee the inside loudspeakers air pressure balance, and adjust sounding effect, near a side of bottoms hole 7 is set at shell 4.This structure has improved the magnetic circuit utilance of loud speaker to a certain extent, and this microscler design can be implemented in the less area of plane and is issued to bigger power and better tonequality.But this design still has a lot of defectives, mainly comprises: 1, under the less situation of the size of product, this design can't reach the needs of automated production; 2, the difficulty of this sound hole design is bigger, and is difficult to size is done greatly, also just can't reach the effect of adjusting tonequality; 3, this middle part projection, smooth all around yoke manufacture difficulty are bigger.Even if the hole is set a plurality of, still can't reaches corresponding target, and bring more difficulty can for the making of part in the yoke bottom.So, be necessary to provide a kind of manufacture craft simple, be convenient to automated production, part manufacturing cost is cheap, acoustical behavior good, and can use the miniature moving-coil type electroacoustic transducer in the multiple magnetic structure.
The utility model content
Technical problem to be solved in the utility model provides a kind of new micro moving-coil type electro-acoustic conversing device, and manufacture craft is simple, be convenient to automated production, part manufacturing cost is cheap, acoustical behavior good, and can use in the multiple magnetic structure.
For solving the problems of the technologies described above, the technical solution of the utility model is: miniature moving-coil type electroacoustic transducer comprises magnetic circuit device and vibrating device, fixing, as to connect described magnetic circuit device and described vibrating device shell; Described magnetic circuit device comprise rectangle the basin frame, be installed in the bar magnet on the described basin frame and be installed in washer on the magnet, described basin frame, magnet and washer form two strip magnetic gap; Described vibrating device comprises the vibrating diaphragm that is shaped as long narrow shape, is fixed with long narrow shape frame voice coil loudspeaker voice coil on the described vibrating diaphragm, and two symmetrical limits of described voice coil loudspeaker voice coil are positioned at the magnetic gap of described magnetic circuit device; Described shell is a long narrow shape frame-type shell; Wherein: the mid portion of described outer casing bottom opening is by the shutoff of described basin frame, the madial wall formation sound hole of two free ends of described basin frame and described shell.
As to improvement of the technical scheme, described magnetic circuit device is that the smooth bar shaped T iron basin frame in protruding both sides, a middle part, two are installed on the strip magnet of flat part, described bar shaped T iron basin frame both sides and cover the external magnetic type structures that the washer of described magnet top is formed; The middle part lug boss of described bar shaped T iron basin frame is consistent with par, both sides length; The long length of side of described voice coil loudspeaker voice coil goes out described bar shaped T iron basin frame and described magnet; The inwall of described shell is long narrow shape, wherein the side of two fixing described bar shaped T iron basin framves of relative long limit inwall and described magnet, two described sound of two free ends of two relative minor face inwalls and described bar shaped T iron basin frame formation holes in addition.
As to further improvement in the technical proposal, described washer is two strip washers or an annular washer.
As to improvement of the technical scheme, described magnetic circuit device is that a both sides projection becomes sidewall and the bar shaped basin frame of middle portion flattening, one are installed on the strip magnet of flat part, described bar shaped basin frame middle part and cover the internal magnetization structure that the strip washer of described magnet top is formed; The both sides sidewall of described bar shaped basin frame is consistent with the length of par, middle part; The long length of side of described voice coil loudspeaker voice coil goes out described bar shaped basin frame, described magnet and described washer; The inwall of described shell is long narrow shape, wherein the side of two fixing described bar shaped basin framves of relative long limit inwall, two described sound of the free end of two relative minor face inwalls and described bar shaped basin frame formation holes in addition.
As to improvement of the technical scheme, described magnetic circuit device is that a bar shaped basin frame, one the strip internal magnet that is installed on described bar shaped basin frame middle part, two are installed on the strip external magnet of described bar shaped basin frame both sides and cover described internal magnet respectively and double-magnetic structure that a plurality of washers of external magnet top are formed; The long length of side of described voice coil loudspeaker voice coil goes out described bar shaped basin frame and described magnet; The inwall of described shell is long narrow shape, wherein the side of two fixing described external magnets of relative long limit inwall, two described sound of the free end of two relative minor face inwalls and described bar shaped basin frame formation holes in addition.
As to further improvement in the technical proposal, described sound outside, hole is equipped with damping device.
As to further improvement in the technical proposal, the minor face bottom level position of described shell is higher than the bottom level position of described magnetic circuit device, and the minor face of described shell bottom is equipped with flexible terminal.
As to further improvement in the technical proposal, the lead-in wire of described voice coil loudspeaker voice coil is drawn away from an end of described vibrating diaphragm and is passed from described sound hole from described voice coil loudspeaker voice coil, is electrically connected to described flexible terminal by wiring board.
In the utility model, described long narrow shape be shaped as have two parallel long limits, described two parallel two ends, long limit are connected by two minor faces, described two minor faces can be two parallel rectilinear forms or two relative circular shapes.
Owing to adopted technique scheme, miniature moving-coil type electroacoustic transducer comprises magnetic circuit device and vibrating device, fixing, as to connect described magnetic circuit device and described vibrating device shell; Described magnetic circuit device comprise rectangle the basin frame, be installed in the bar magnet on the described basin frame and be installed in washer on the magnet, described basin frame, magnet and washer form two strip magnetic gap; Described vibrating device comprises the vibrating diaphragm that is shaped as long narrow shape, is fixed with long narrow shape frame voice coil loudspeaker voice coil on the described vibrating diaphragm, and two symmetrical limits of described voice coil loudspeaker voice coil are positioned at the magnetic gap of described magnetic circuit device; Described shell is a long narrow shape frame-type shell; Wherein: the mid portion of described outer casing bottom opening is by the shutoff of described basin frame, the madial wall formation sound hole of two free ends of described basin frame and described shell; The manufacture craft of this structure is simple, be convenient to automated production, part manufacturing cost is cheap, acoustical behavior good, and can use in the multiple magnetic structure.
Description of drawings
Fig. 1 is the structure principle chart of the utility model case study on implementation one, and the A-A that is Fig. 3 is to cutaway view;
Fig. 2 is the structure principle chart of the utility model case study on implementation one, and the B-B that is Fig. 3 is to cutaway view (turning clockwise 90 °);
Fig. 3 is the schematic top plan view after the utility model case study on implementation one removes vibrating diaphragm;
Fig. 4 is the structure principle chart of the utility model case study on implementation two, and the A-A that is Fig. 6 is to cutaway view;
Fig. 5 is the structure principle chart of the utility model case study on implementation two, and the B-B that is Fig. 6 is to cutaway view (turning clockwise 90 °);
Fig. 6 is the schematic top plan view after the utility model case study on implementation two removes vibrating diaphragm;
Fig. 7 is the longitudinal sectional view of primary products;
Fig. 8 is the transverse sectional view of primary products.
Embodiment
Embodiment one: as Fig. 1, Fig. 2, shown in Figure 3, the implementation case has been described miniature moving-coil type electroacoustic transducer, comprises that a magnetic circuit device, vibrating device, one are connected and fixed the shell of magnetic circuit device and vibrating device, the lead-in wire that is bonded in the wiring board on the shell and draws from coil.Magnetic circuit device comprises a bar shaped T iron basin frame 11, and T iron 11 comprises par, both sides 111 and middle part lug boss 112, and the two ends of par 111 and lug boss 112 are concordant; Two strip magnet 12 that are installed on T iron 11 pars 111, the length of magnet 12 is consistent with T iron 11; Cover two strip washers 13 of magnet 12 tops, the length of washer 13 is consistent with magnet 12; T iron 11, magnet 12 and washer 13 are formed external magnetic type structure.Vibrating device comprises voice coil loudspeaker voice coil 16 and microscler vibrating diaphragm 15 of a squarish, and two relative long limits of voice coil loudspeaker voice coil 16 are in the magnetic gap of magnetic circuit device, and the edge of vibrating diaphragm 15 is bonded on the shell 14.Shell 14 is a strip square frame of squarish, two relative long limit inwall is connected and fixed the outside of T iron 11, magnet 12 and washer 13, two relative minor face inwalls are away from the two ends of T iron 11, magnet 12 and washer 13, thereby form two holes 17 with the two ends of T iron 11, magnet 12 and washer 13, two relative minor faces of voice coil loudspeaker voice coil 16 are on the upright position of these two holes 17; The bottom level position of two relative short edges of shell 14 is higher than the bottom level position of T iron 11, and in the bottom of two relative short edges of shell 14 wiring board 18 is installed; Hole 17 is drawn and passed to lead-in wire 19 from voice coil loudspeaker voice coil 16 away from an end of vibrating diaphragm 15, is connected on the wiring board 18.
This product has following advantage with respect to traditional product:
1, the two ends of the par of T iron and lug boss are concordant, are convenient to part and make low production cost;
2, the miniature moving-coil type electroacoustic transducer bottom hole realized of this structure is bigger, can realize dispelling the heat preferably, function such as sounding, and damping can be installed, the convenient tonequality of regulating in the bottom hole outside;
3, the miniature moving-coil type electroacoustic transducer bottom hole of this structure realization is bigger, and penetrating up and down, also can stretch into frock, manipulator etc. from the product below, can realize automated production, and efficiency of assembling and consistency all have raising;
4, the design that to be connected on the housing exterior wiring board is drawn, pierced by the miniature moving-coil type electroacoustic transducer base apertures to lead-in wire from the voice coil loudspeaker voice coil below, in the high power work of loud speaker, lead-in wire is difficult to touch magnetic circuit part or shell, and lead-in wire keeps vacant state also to avoid lead-in wire is bonded in cause on the vibrating diaphragm various bad;
5, the bottom level position of two of shell relative short edges is higher than the bottom level position of T iron, and wiring board is installed in the bottom of two relative short edges of shell, can be so that the increase of wiring board influence the whole height of product, and the bottom of convenient two relative short edges at shell is further installed flexible terminal and is used for product and does not increase product size with being connected of terminal applies electronic product.
In the implementation case, washer 13 can not adopt two rectangular designs, and adopts annular design, such as a rectangle, does not influence the realization of the utility model main purpose.
Embodiment two: as Fig. 4, Fig. 5, shown in Figure 6, be with the key difference of the utility model case study on implementation one, the implementation case has adopted the internal magnetic circuit structure, and magnetic circuit device is that the bar shaped basin frame 21, of a sidewall 212 that is become by the both sides projection and par, middle part 211 is installed on the strip magnet 22 of par, bar shaped basin frame 21 middle part 211 and covers the internal magnetization structure that the strip washer 23 of magnet 22 tops is formed.The both sides sidewall 212 of bar shaped basin frame 21 is consistent with the length of par, middle part 211; Basin frame 21, magnet 22 are consistent with the length of washer 23; Two relative long limits of voice coil loudspeaker voice coil 26 are in the magnetic gap of magnetic circuit device; Shell 24 is a strip square frame of squarish, two relative long limit inwall is connected and fixed sidewall 212 outsides of basin frame 21, two relative minor face inwalls are away from the two ends of basin frame 21, magnet 22 and washer 23, thereby form two holes 27 with the two ends of basin frame 21, magnet 22 and washer 23, two relative minor faces of voice coil loudspeaker voice coil 26 are on the upright position of these two holes 27.
The implementation case is applied in main thought of the present utility model in the internal magnetic circuit infrastructure product, can reach identical effect, equally, the utility model also can be applied in the two magnetic route structure, in view of two kinds of case study on implementation enumerating external magnetic circuit structure and internal magnetic circuit infrastructure product, concrete case study on implementation is no longer enumerated in the application of two magnetic route structure.Also comprise other parts such as a protecgulum that covers vibrating diaphragm, dust proof member in the general moving-coil type electroacoustic converting system structure, the setting of this type of part and have or not the creativeness that does not influence this patent also repeats no more at this.
Claims (8)
1. miniature moving-coil type electroacoustic transducer comprises magnetic circuit device and vibrating device, fixing, as to connect described magnetic circuit device and described vibrating device shell; Described magnetic circuit device comprise rectangle the basin frame, be installed in the bar magnet on the described basin frame and be installed in washer on the magnet, described basin frame, magnet and washer form two strip magnetic gap; Described vibrating device comprises the vibrating diaphragm that is shaped as long narrow shape, is fixed with long narrow shape frame voice coil loudspeaker voice coil on the described vibrating diaphragm, and two symmetrical limits of described voice coil loudspeaker voice coil are positioned at the magnetic gap of described magnetic circuit device; Described shell is a long narrow shape frame-type shell; It is characterized in that: the mid portion of described outer casing bottom opening is by the shutoff of described basin frame, the madial wall formation sound hole of two free ends of described basin frame and described shell.
2. miniature moving-coil type electroacoustic transducer as claimed in claim 1 is characterized in that: described magnetic circuit device is the smooth bar shaped T iron basin frame in protruding both sides, a middle part, two external magnetic type structures that are installed on the strip magnet of flat part, described bar shaped T iron basin frame both sides and cover the washer composition of described magnet top; The middle part lug boss of described bar shaped T iron basin frame is consistent with par, both sides length; The long length of side of described voice coil loudspeaker voice coil goes out described bar shaped T iron basin frame and described magnet; The inwall of described shell is long narrow shape, wherein the side of two fixing described bar shaped T iron basin framves of relative long limit inwall and described magnet, two described sound of two free ends of two relative minor face inwalls and described bar shaped T iron basin frame formation holes in addition.
3. miniature moving-coil type electroacoustic transducer as claimed in claim 2 is characterized in that: described washer is two strip washers or an annular washer.
4. miniature moving-coil type electroacoustic transducer as claimed in claim 1, it is characterized in that described magnetic circuit device is that a both sides projection becomes sidewall and the bar shaped basin frame of middle portion flattening, one are installed on the strip magnet of flat part, described bar shaped basin frame middle part and cover the internal magnetization structure that the strip washer of described magnet top is formed; The both sides sidewall of described bar shaped basin frame is consistent with the length of par, middle part; The long length of side of described voice coil loudspeaker voice coil goes out described bar shaped basin frame, described magnet and described washer; The inwall of described shell is long narrow shape, wherein the side of two fixing described bar shaped basin framves of relative long limit inwall, two described sound of the free end of two relative minor face inwalls and described bar shaped basin frame formation holes in addition.
5. miniature moving-coil type electroacoustic transducer as claimed in claim 1 is characterized in that: described magnetic circuit device is that a bar shaped basin frame, one the strip internal magnet that is installed on described bar shaped basin frame middle part, two are installed on the strip external magnet of described bar shaped basin frame both sides and cover described internal magnet respectively and double-magnetic structure that a plurality of washers of external magnet top are formed; The long length of side of described voice coil loudspeaker voice coil goes out described bar shaped basin frame and described magnet; The inwall of described shell is long narrow shape, wherein the side of two fixing described external magnets of relative long limit inwall, two described sound of the free end of two relative minor face inwalls and described bar shaped basin frame formation holes in addition.
6. as claim 1,2,3,4 or 5 described miniature moving-coil type electroacoustic transducers, it is characterized in that: described sound outside, hole is equipped with damping device.
7. as claim 2,3,4 or 5 described miniature moving-coil type electroacoustic transducers, it is characterized in that: the minor face bottom level position of described shell is higher than the bottom level position of described magnetic circuit device, and the minor face of described shell bottom is equipped with flexible terminal.
8. miniature moving-coil type electroacoustic transducer as claimed in claim 7 is characterized in that: the lead-in wire of described voice coil loudspeaker voice coil is drawn away from an end of described vibrating diaphragm and is passed from described sound hole from described voice coil loudspeaker voice coil, is electrically connected to described flexible terminal by wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820017172XU CN201153323Y (en) | 2008-01-29 | 2008-01-29 | Micro moving-coil type electro-acoustic conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820017172XU CN201153323Y (en) | 2008-01-29 | 2008-01-29 | Micro moving-coil type electro-acoustic conversion device |
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| Publication Number | Publication Date |
|---|---|
| CN201153323Y true CN201153323Y (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820017172XU Expired - Lifetime CN201153323Y (en) | 2008-01-29 | 2008-01-29 | Micro moving-coil type electro-acoustic conversion device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320746A (en) * | 2009-01-30 | 2015-01-28 | 日本先锋公司 | Loudspeaker device |
| CN110933568A (en) * | 2019-12-10 | 2020-03-27 | 歌尔股份有限公司 | Speaker and audio device |
-
2008
- 2008-01-29 CN CNU200820017172XU patent/CN201153323Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320746A (en) * | 2009-01-30 | 2015-01-28 | 日本先锋公司 | Loudspeaker device |
| CN110933568A (en) * | 2019-12-10 | 2020-03-27 | 歌尔股份有限公司 | Speaker and audio device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081119 |
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| CX01 | Expiry of patent term |