CN219834365U - A dual-driver double-sided sound microspeaker - Google Patents

Abstract

The double-drive double-sided sounding micro-speaker comprises a support assembly, a first vibrating diaphragm assembly, a second vibrating diaphragm assembly, a first voice coil, a second voice coil, a first centering support piece, a second centering support piece and a magnetic circuit system, wherein the magnetic circuit system comprises a first central magnetic steel, a second central magnetic steel and a side magnetic steel, the side magnetic steel comprises a long side magnetic steel and a short side magnetic steel, and by arranging the centering support piece with a cantilever of 7 shape, enough space is reserved for the outer side of the voice coil, and short side magnetic steel can be placed between the first central magnetic steel and the first centering support piece and/or between the second central magnetic steel and the second centering support piece, so that the magnetic flux of a short-axis magnetic circuit is increased, the performance sensitivity of a sounding unit is enhanced, and the acoustic performance of the double-drive double-sided sounding micro-speaker is improved.

Description

A dual-driver double-sided sound microspeaker

Technical field

The utility model relates to the technical field of electroacoustic conversion devices, and in particular to a dual-drive double-sided sound-emitting micro-speaker.

Background technique

With the development of electronic equipment technology, people have higher and higher requirements for the external sound effects of electronic equipment, such as laptop computers. In order to improve the low-frequency frequency response of laptop computers, the amplitude of the laptop's micro-speakers is designed to be larger and larger. Under large-amplitude applications, the vibration of the micro-speaker's voice coil and diaphragm will excite the keyboard to vibrate, which will produce noise and affect the sound quality of the external amplifier. Currently, the vibration of the keyboard is reduced by reducing the amplitude of the speaker voice coil, but this also reduces the low-frequency loudness and sacrifices the sound effect.

Therefore, in the existing technology, a sound-emitting unit with a double-sided sound-emitting design is adopted, that is, the first diaphragm component and the second diaphragm component emit sound in two opposite directions at the same time, which offsets part of the reverse force and reduces the noise to a certain extent. Vibration, thereby reducing the vibration impact on the keyboard and avoiding noise. The existing double-sided sound-generating unit is designed with a centering support piece. The centering support piece includes an inner fixing part, a cantilever part, and an outer fixing part. The inner fixing part is fixed on the bottom or side of the voice coil, and the outer fixing part is fixed on the voice coil. The basin frame and the cantilever part provide deformation, conduct conduction and suppress rolling vibration. However, the fixed part and the cantilever part of the centering support piece will occupy the outer space of the voice coil, making it impossible to add edge magnets outside the voice coil. Steel, thus unable to further improve the performance sensitivity of the sound unit.

Utility model content

The technical problem to be solved by this utility model is to provide a dual-drive double-sided speaker with better acoustic performance.

In order to solve the above technical problems, the technical solution adopted by this utility model is:

A dual-drive double-sided sound microspeaker, including a support component, a first diaphragm component, a second diaphragm component, a first voice coil, a second voice coil, a first centering support piece, a second centering support piece and magnetic circuit system;

The support assembly includes a first basin frame, a support plate and a second basin frame;

The support plate is located between the first basket and the second basket, the first diaphragm assembly is located at an end of the first basket away from the second basket, and the second diaphragm assembly is located at an end of the second basket away from the second basket. One end of the first basket;

The first voice coil is located between the first diaphragm component and the support plate, one end of the first voice coil is fixed on the first diaphragm component, and the other end of the first voice coil is fixed on the first centering On the support piece, the second voice coil is located between the second diaphragm component and the support plate. One end of the second voice coil is fixed on the second diaphragm component, and the other end of the second voice coil is fixed on the second diaphragm component. On the second centering support piece;

The first centering support piece and the second centering support piece have the same structure, both including a first connecting part, a cantilever and a second connecting part;

The first connecting part is connected to the voice coil, the second connecting part is connected to the basin frame, the first connecting part and the second connecting part are connected through a cantilever, and the cantilever is a "7" shaped structure;

The magnetic circuit system includes a first center magnet, a second center magnet and side magnets;

The first center magnet is located on one end of the support plate close to the first diaphragm assembly, and the second center magnet is located on one end of the support plate close to the second diaphragm assembly;

The side magnets are arranged circumferentially around the first center magnet and the second center magnet;

The side magnets include long side magnets and short side magnets. The short side magnets are located between the first center magnet and the first centering piece and/or the second center magnet and the second centering piece. between.

Further, the support plate is provided with a through hole, and the centering support piece can vibrate in the through hole.

Furthermore, an extension portion is provided inside the through hole of the support plate, and the extension portion is in contact with the short-side magnetic steel.

Further, the thickness of the extension part is smaller than the thickness of the support plate.

Further, the magnetic circuit system also includes a first center washer, a first annular washer, a second center washer and a second annular washer;

The first center washer is disposed on a side of the first center magnet far away from the support plate, the second center washer is disposed on a side of the second center magnet far away from the support plate, and the first annular washer is disposed on a side of the second center magnet far away from the support plate. The second annular washer is provided on a side of the side magnet steel that is far away from the second basket frame.

Further, the first annular washer has a first elongated part, the second annular washer has a second elongated part, and the short-side magnetic steel is located between the first elongated part and the second elongated part. In the space, the short-side magnetic steel is bonded and fixed to the first elongated part and the second elongated part.

Further, the short-side magnet includes a first short-side magnet and a second short-side magnet;

The first short-side magnet is located on the extension in the support plate through hole on the same side as the first center magnet, and the second short-side magnet is located on the support through hole on the same side as the second center magnet. on the inner extension.

Further, the magnetic circuit system also includes a first side washer and a second side washer. The first side washer is located on a side of the first short-side magnet far away from the support plate. The second side washer is located on the side of the first short-side magnet away from the support plate. It is located on the side of the second short side magnet far away from the support plate.

Further, the material of the support plate is stainless steel.

Further, the support plate is provided with a limiting notch, and the first basket frame and/or the second basket frame is provided with limiting protrusions corresponding to the limiting notch to prevent the support plate from moving.

The beneficial effects of this utility model are:

Compared with the existing technology, the dual-drive double-sided sound microspeaker of the present invention includes a support component, a first diaphragm component, a second diaphragm component, a first voice coil, a second voice coil, a first centering support piece, The second centering support piece and the magnetic circuit system include the first center magnet, the second center magnet and the side magnets, and the side magnets include long side magnets and short side magnets. Setting the cantilever into a "7"-shaped centering piece leaves enough space outside the voice coil, and can connect the first center magnet and the first centering piece and/or the second center magnet and the second centering piece. The short-side magnets are placed between the core pieces, which increases the magnetic flux of the short-axis magnetic circuit and enhances the performance sensitivity of the sound unit, thereby improving the acoustic performance of the dual-drive double-sided sound micro-speaker.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present utility model more clearly, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. , for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative labor. in

Figure 1 is an exploded view of a dual-drive double-sided sounding microspeaker in the utility model;

Figure 2 is a top view of a dual-drive double-sided sounding microspeaker in the utility model;

Figure 3 is a cross-sectional view at A-A in Figure 2;

Figure 4 is a schematic diagram of the centering support piece of a dual-drive double-sided sounding microspeaker in the utility model;

Figure 5 is a cross-sectional view at B-B in Figure 2 - Embodiment 1;

Figure 6 is a cross-sectional view at B-B in Figure 2 - Embodiment 2;

Figure 7 is a cross-sectional view at B-B in Figure 2 - Embodiment 3.

100. The first diaphragm component; 110. The second diaphragm component; 200. The first voice coil; 210. The second voice coil; 300. The first basin frame; 310. The second basin frame; 400. The first centering Support piece; 401, cantilever; 402, first connection part; 403, second connection part; 410, second centering support piece; 500, first center washer; 510, second center washer; 600, first Center magnet; 610, second center magnet; 700, support plate; 710, extension; 800, short side magnet; 801, first short side magnet; 802, second short side magnet; 810, long Edge magnet steel; 900, first annular washer; 910, second annular washer; 901, first extension part; 911, second elongation part; 1000, first edge washer; 1010, second edge washer manage.

Detailed ways

In order to describe the technical content, achieved objectives and effects of the present invention in detail, the following description will be made in combination with the embodiments and the accompanying drawings.

Please refer to Figures 1 to 5, a dual-drive double-sided sounding micro speaker includes a support component, a first diaphragm component 100, a second diaphragm component 110, a first voice coil 200, a second voice coil 210, a The first centering support piece 400, the second centering support piece 410 and the magnetic circuit system;

The support assembly includes a first basket 300, a support plate 700 and a second basket 310;

The support plate 700 is located between the first frame 300 and the second frame 310 . The first diaphragm assembly 100 is located at an end of the first frame 300 away from the second frame 310 . The second diaphragm assembly 100 is located at an end of the first frame 300 away from the second frame 310 . 110 is located at an end of the second basket 310 away from the first basket 300;

The first voice coil 200 is located between the first diaphragm component 100 and the support plate 700 . One end of the first voice coil 200 is fixed on the first diaphragm component 100 , and the other end of the first voice coil 200 is fixed to the first diaphragm component 100 . Fixed on the first centering support piece 400, the second voice coil 210 is located between the second diaphragm component 110 and the support plate 700, and one end of the second voice coil 210 is fixed on the second diaphragm component 110. , the other end of the second voice coil 210 is fixed on the second centering support piece 410;

The first centering support piece 400 and the second centering support piece 410 have the same structure, both including a first connection part 402, a cantilever 401 and a second connection part 403;

The first connection part 402 is connected to the basket, the second connection part 403 is connected to the voice coil, the first connection part 402 and the second connection part 403 are connected through a cantilever 401, and the cantilever 401 is in the shape of a "7" structure;

The magnetic circuit system includes a first center magnet 600, a second center magnet 610 and side magnets;

The first center magnet 600 is located at one end of the support plate 700 close to the first diaphragm assembly 100, and the second center magnet 610 is located at one end of the support plate 700 close to the second diaphragm assembly 110;

The side magnets are arranged around the circumference of the first center magnet 600 and the second center magnet 610;

The side magnets include long side magnets 810 and short side magnets 800. The short side magnets 800 are located between the first center magnet 600 and the first centering support piece 400 and/or the second center magnet 610 and between the second centering support pieces 410.

As can be seen from the above description, the beneficial effect of the present invention is to provide a dual-drive double-sided sounding micro speaker including a support component, a first diaphragm component 100, a second diaphragm component 110, a first voice coil 200, a second voice coil The ring 210, the first centering support piece 400, the second centering support piece 410 and the magnetic circuit system include the first center magnet 600, the second center magnet 610 and the side magnets. The magnets include long-side magnets 810 and short-side magnets 800. By setting the cantilever 401 as a "7"-shaped centering piece, enough space is left outside the voice coil, so that the first center magnet 600 and The short-side magnet is placed between the first centering support piece 400 and/or the second center magnet 610 and the second centering support piece 410, so that the magnetic flux of the short-axis magnetic circuit is increased and the performance sensitivity of the sound unit is enhanced. This improves the acoustic performance of the dual-driver double-sided sound micro-speaker.

Further, the support plate 700 is provided with a through hole, and the centering support piece can vibrate in the through hole.

It can be seen from the above description that when the dual-drive double-sided sound micro-speaker emits sound, the voice coil drives the centering support piece to vibrate. By providing a through hole on the support plate 700, the centering support piece can have a larger amplitude, which improves the Speaker acoustic performance.

Furthermore, an extension portion 710 is provided inside the through hole of the support plate, and the extension portion 710 is in contact with the short-side magnet 800 .

It can be seen from the above description that the extension part 710 in the through hole is in contact with the short-side magnetic steel 800, and the extension part 710 can block the air flow in the two magnetic gaps where the first voice coil 200 and the second voice coil 210 are located. Therefore, there will be no air flow turbulence, thereby minimizing the impact of the air flow on the first voice coil 200 and the second voice coil 210 .

Further, the thickness of the extension portion 710 is smaller than the thickness of the support plate 700 .

It can be seen from the above description that the thickness of the extension part 710 is smaller than the thickness of the support plate 700 , which is beneficial to increasing the vibration stroke of the magnetic gap where the first voice coil 200 is located and/or increasing the magnetic gap where the second voice coil 210 is located. The vibration stroke of the gap increases the amplitude of the first diaphragm assembly 100 and/or the second diaphragm assembly 110 and improves the acoustic performance of the speaker.

Further, the magnetic circuit system also includes a first center washer 500, a first annular washer 900, a second center washer 510 and a second annular washer 910;

The first center washer 500 is disposed on a side of the first center magnet 600 away from the support plate 700, and the second center washer 510 is disposed on a side of the second center magnet 610 away from the support plate 700. The first annular washer 900 is disposed on the side of the edge magnet away from the second frame 310 , and the second annular washer 910 is disposed on the side of the edge magnet away from the first frame 300 .

Further, the first annular washer 900 has a first elongated part 901, the second annular washer 910 has a second elongated part 911, and the short-side magnet 800 is located between the first elongated part 901 and the second elongated part 911. In the space between the elongated parts 911, the short-side magnet 800 is bonded and fixed to the first elongated part 901 and the second elongated part 911.

It can be seen from the above description that the first annular washer 500 and the second annular washer 510 in the magnetic circuit system have extension parts, which can be used as the support part of the short-side magnet 800 or as the washers of the short-side magnet 800 Use to further improve acoustic performance.

Further, the short-side magnet 800 includes a first short-side magnet 801 and a second short-side magnet 802;

The first short side magnet 801 is located on the extension 710 in the through hole of the support plate 700 on the same side as the first center magnet 600, and the second short side magnet 802 is located on the same surface as the second center magnet 610. On the extension part 710 in the through hole of the support part on the same surface.

Further, the magnetic circuit system also includes a first side washer 1000 and a second side washer 1010. The first side washer 1000 is located on the side of the first short side magnet 801 away from the support plate 700. The second side washer 1010 is located on the side of the second short side magnet 802 away from the support plate 700 .

As can be seen from the above description, in order to improve the overall strength of the speaker, a first short-side magnet 801 and a second short-side magnet 802 are respectively provided on both sides of the extension 710 in the through hole of the support plate 700. Further, on the first short-side magnet The side magnet 801 and the second short side magnet 802 can use the extension part of the annular washer as a washer. Further, the first short side magnet 801 and the second short side magnet 802 are separated from each other. A first side washer 1000 and a second side washer 1010 are provided on one side of the support plate 700, thereby improving the acoustic performance.

Further, the material of the support plate 700 is stainless steel.

Further, the support plate 700 has a limiting notch, and the first basket 300 and/or the second basket 310 are provided with limiting bumps corresponding to the limiting notches to prevent the support plate from moving. 700 moves.

As can be seen from the above description, the limiting notch on the support plate 700 and the corresponding bumps provided on the first basket 300 and/or the second basket 310 can prevent the support plate 700 from moving inside the speaker. Enhance speaker stability.

Please refer to Figures 1 to 5. Embodiment 1 of the present invention is: a dual-drive double-sided sounding micro speaker, including a support component, a first diaphragm component 100, a second diaphragm component 110, a first sound The coil 200, the second voice coil 210, the centering support piece and the magnetic circuit system; the support assembly includes the first basket 300, the support plate 700 and the second basket 310; the support plate 700 is located on the first basket 300 and the second frame 310, the first diaphragm assembly 100 is located at an end of the first frame 300 away from the second frame 310, and the second diaphragm assembly 110 is located at the end of the second frame 310 away from the first frame 310. One end of the basin frame 300; the centering support piece includes a first centering support piece 400 and a second centering support piece 410. In this embodiment, the first centering support piece 400 and the second centering support piece 410 The number is 2, and they are respectively arranged on the fixed parts at both ends of the basin frame; the first voice coil 200 is located between the first diaphragm assembly 100 and the support plate 700, and one end of the first voice coil 200 is fixed on the On a diaphragm assembly 100, the other end of the first voice coil 200 is fixed on the first centering support piece 400, and the second voice coil 210 is located between the second diaphragm assembly 110 and the support plate 700, so One end of the second voice coil 210 is fixed on the second diaphragm assembly 110, and the other end of the second voice coil 210 is fixed on the second centering support piece 410; the first centering support piece 400 and the The two centering supports 410 have the same structure, both including a first connection part 402, a cantilever 401 and a second connection part 403; the first connection part 402 is connected to the voice coil, and the second connection part 403 is connected to the basin frame, The first connecting part 402 and the second connecting part 403 are connected through a cantilever 401. Preferably, the cantilever 401 has a "7"-shaped structure. The magnetic circuit system includes a first center magnet 600, a second center magnet 610 and side magnets; the first center magnet 600 is located at one end of the support plate 700 close to the first diaphragm assembly 100. The two central magnets 610 are located on one end of the support plate 700 close to the second diaphragm assembly 110; the side magnets are arranged around the circumference of the first central magnet 600 and the second central magnet 610; The side magnets include long side magnets 810 and short side magnets 800. Preferably, the short side magnets 800 are located between the first center magnet 600 and the first centering support piece 400 and/or the second center magnet 610. In this embodiment, there are two short-side magnets 800 between the second centering support piece 410 and the second centering support piece 410 .

Referring to Figure 5, through holes are provided at both ends of the support plate 700. The short-side magnet 800 is located inside the through hole. Preferably, the extension portion 710 of the support plate 700 in the through hole is in contact with the through hole. Short-side magnet 800, the extension part 710 in the through hole is in contact with the short-side magnet 800, and the extension 710 can block the air flow in the two magnetic gaps where the first voice coil 200 and the second voice coil 210 are located. , so there will be no air flow turbulence, thereby minimizing the impact of the air flow on the first voice coil 200 and the second voice coil 210 . Preferably, the thickness of the extension portion 710 is smaller than the thickness of the support plate 700 , which is not shown in the figure. The magnetic circuit system also includes a first center washer 500, a first annular washer 900, a second center washer 510 and a second annular washer 910; the first center washer 500 is located on the first center magnet. 600 is on the side away from the support plate 700, the second center washer 510 is disposed on the side of the second center magnet 610 away from the support plate 700, and the first annular washer 900 is disposed on the side magnet away from the second basin. On one side of the frame 310, the second annular washer 910 is disposed on the side of the edge magnet away from the first basin frame 300. Preferably, the first annular washer 900 and the second annular washer 910 have an extension part, The short side magnet 800 is located in the extension part.

In order to improve the stability and overall strength of the speaker, the material of the support plate 700 is preferably stainless steel. Preferably, the support plate 700 has a limiting notch, and the first basket 300 and/or the second basket 310 are provided with limiting protrusions corresponding to the limiting notches to prevent the supporting plate 700 from move.

When in use, the cantilever 401 is set as a centering support piece with a "7"-shaped structure. Starting from the outer fixed part 402 of the centering support piece, the "7"-shaped cantilever 401 reduces the occupation of the space outside the voice coil. Short-side magnets 800 are added between the first center magnet 600 and the first centering support piece 400 and/or the second center magnet 610 and the second centering support piece 410 to increase the magnetic flux of the magnetic circuit, thereby enhancing the sound-generating unit. performance sensitivity, improving acoustic performance.

Please refer to Figure 6. The only difference between Embodiment 2 of the present invention and Embodiment 1 is that in this embodiment, the magnetic circuit system also includes a first side washer 1000 and a second side washer 1010. Preferably , the first side washer 1000 and the second side washer 1010 are located on both sides of the short side magnetic steel 800, the annular washer does not need to be provided with an extension part, the side washers are used alone, the first side washer 1000 and the second side washer Washer 1010 and short side magnet 800 are bonded and fixed.

Please refer to Figure 7. The difference between Embodiment 3 of the present invention and Embodiment 2 is only that: in this embodiment, the short-side magnet 800 includes a first short-side magnet 801 and a second short-side magnet 802; The first short-side magnet 801 is located on the extension 710 in the through hole of the support plate 700 on the same side as the first center magnet 600. The second short-side magnet 802 is located on the same side as the second center magnet 610. The support part 700 on the surface is on the extension part 710 in the through hole. Preferably, the first short-side magnet 801 and the second short-side magnet 802 are fixed on the extension part 710 in the through hole of the support part 700 by bonding, which can not only improve the acoustic performance, but also further improve the overall sound of the speaker. stability.

In summary, the present utility model leaves enough space outside the voice coil by arranging the cantilever 401 as a "7"-shaped centering piece, so that the first center magnet 600 and the first centering piece can be 400 and/or the short-side magnet 800 is placed between the second center magnet 610 and the second centering support piece 410, which increases the magnetic flux of the short-axis magnetic circuit and enhances the performance sensitivity of the sound unit, thereby improving dual-drive double-sided sound generation. Acoustic performance of microspeakers.

The above descriptions are only examples of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent transformations made using the contents of the description and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, are equivalent to The rationale is included in the patent protection scope of this utility model.

Claims (10)

1. A dual-drive double-sided sound microspeaker, characterized in that it includes a support component, a first diaphragm component, a second diaphragm component, a first voice coil, a second voice coil, a centering support piece and a magnetic circuit system ; The support assembly includes a first basin frame, a support plate and a second basin frame; The support plate is located between the first basket and the second basket, the first diaphragm assembly is located at an end of the first basket away from the second basket, and the second diaphragm assembly is located at an end of the second basket away from the second basket. One end of the first basket; The centering support piece includes a first centering support piece and a second centering support piece; The first voice coil is located between the first diaphragm component and the support plate, one end of the first voice coil is fixed on the first diaphragm component, and the other end of the first voice coil is fixed on the first centering On the support piece, the second voice coil is located between the second diaphragm component and the support plate. One end of the second voice coil is fixed on the second diaphragm component, and the other end of the second voice coil is fixed on the second diaphragm component. On the second centering support piece; The first centering support piece and the second centering support piece have the same structure, both including a first connecting part, a cantilever and a second connecting part; The first connecting part is connected to the voice coil, the second connecting part is connected to the basin frame, the first connecting part and the second connecting part are connected through a cantilever, and the cantilever is a "7" shaped structure; The magnetic circuit system includes a first center magnet, a second center magnet and side magnets; The first center magnet is located on one end of the support plate close to the first diaphragm assembly, and the second center magnet is located on one end of the support plate close to the second diaphragm assembly; The side magnets are arranged circumferentially around the first center magnet and the second center magnet; The side magnets include long side magnets and short side magnets. The short side magnets are located between the first center magnet and the first centering piece and/or the second center magnet and the second centering piece. between. 2. The dual-drive double-sided sound microspeaker according to claim 1, wherein the support plate is provided with a through hole, and the centering support piece can vibrate in the through hole. 3. The dual-drive double-sided sound microspeaker according to claim 2, wherein an extension portion is provided inside the through hole of the support plate, and the extension portion is in contact with the short-side magnet. 4. The dual-drive double-sided sound microspeaker according to claim 3, wherein the thickness of the extension part is smaller than the thickness of the support plate. 5. The dual-drive double-sided sound microspeaker according to claim 1, wherein the magnetic circuit system further includes a first center washer, a first annular washer, a second center washer and a second annular washer. The first center washer is disposed on the side of the first center magnet away from the support plate, the second center washer is disposed on the side of the second center magnet away from the support plate, and the first annular washer is The second annular washer is disposed on the side of the side magnet steel away from the second basket frame, and the second annular washer is disposed on the side of the side magnet steel away from the first basket frame. 6. The dual-drive double-sided sound microspeaker according to claim 5, wherein the first annular washer has a first elongation part, the second annular washer has a second elongation part, and the short The side magnetic steel is located in the space between the first elongated part and the second elongated part, and the short side magnetic steel is bonded and fixed with the first elongated part and the second elongated part. 7. The dual-drive double-sided sound microspeaker according to claim 2, wherein the short-side magnet includes a first short-side magnet and a second short-side magnet; The first short-side magnet is located on the extension part in the through hole of the support plate on the same side as the first center magnet, and the second short-side magnet is located on the support part on the same side as the second center magnet. on the extension inside the through hole. 8. The dual-drive double-sided sound microspeaker according to claim 7, wherein the magnetic circuit system further includes a first side washer and a second side washer, and the first side washer is located at the third side. One short-side magnet is on a side away from the support plate, and the second side washer is located on a side of the second short-side magnet away from the support plate. 9. The dual-drive double-sided sound microspeaker according to any one of claims 1 to 8, characterized in that the material of the support plate is stainless steel. 10. The dual-drive double-sided sound microspeaker according to claim 9, characterized in that the support plate has a limit notch, and the first basin frame and/or the second basin frame are provided with the limit gap. Limit bumps corresponding to the notch to prevent the support plate from moving.