Multi-coil loudspeaker unit

Abstract

The application discloses a multi-sound coil loudspeaker unit, which comprises a frame, a diaphragm assembly, a magnetic circuit assembly and a plurality of sound coils, the diaphragm assembly is connected to the frame, the sound coils are connected to the diaphragm assembly, at least one of two adjacent sides of two adjacent sound coils has a protruding part protruding towards the other adjacent side, the protruding part is connected to the other adjacent side to form a connecting part, the two adjacent sound coils have two connecting parts, the two connecting parts and the two adjacent sides form a gap with a closed periphery, the magnetic circuit assembly is connected to the frame, the magnetic circuit assembly comprises a yoke and a magnetic conducting structure arranged on the yoke, and the magnetic conducting structure is arranged corresponding to the gap. The multi-sound coil loudspeaker unit has a novel structure, excellent acoustic performance and can keep light and thin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic transducer, in particular to a multi-coil loudspeaker unit. BACKGROUND

[0002] Due to space limitations, the parts of a thin loudspeaker unit are often made thin. When the dome (also known as middle paste or ball top) in the diaphragm assembly is thinned to a certain extent, its rigidity will be significantly weakened, and the multiple voice coils in the loudspeaker unit will exhibit obvious split vibration (voice coil vibration out of sync), resulting in a frequency valley in the mid-high frequency of the loudspeaker unit, which affects the high-frequency cutoff frequency of the loudspeaker unit and leads to a decline in the acoustic performance of the loudspeaker unit.

[0003] To improve this problem, the traditional approach is to thicken the middle paste to enhance the rigidity of the diaphragm assembly, but this will result in an increase in the height of the loudspeaker unit. To avoid an increase in the height of the loudspeaker unit, the magnetic circuit components such as the magnetic steel, the dust cap, and the yoke are thinned based on the thickened middle paste, but thinning the magnetic circuit components will weaken the magnetic conductivity of the magnetic circuit components, resulting in a significant decline in the sensitivity of the loudspeaker unit. SUMMARY

[0004] The technical problem solved by the present application is to provide a thin multi-coil loudspeaker unit with good acoustic performance.

[0005] To solve the above technical problems, the technical solution adopted by the present application is as follows: a multi-coil loudspeaker unit, comprising:

[0006] a basket;

[0007] a diaphragm assembly connected to the basket;

[0008] a plurality of voice coils connected to the diaphragm assembly, at least one of the two adjacent sides of two adjacent voice coils has a protruding portion protruding towards the other adjacent side, the protruding portion is connected to the other adjacent side to form a connecting portion; two adjacent voice coils have two connecting portions, and the two connecting portions and the two adjacent sides form a four-sided enclosed gap;

[0009] a magnetic circuit assembly connected to the basket, the magnetic circuit assembly comprises a yoke and a magnetic conducting structure provided on the yoke, and the magnetic conducting structure is arranged corresponding to the gap.

[0010] The present application has the following advantages:

[0011] The multi-voice-coil loudspeaker monomer has a novel single-body structure, and adjacent edges of two voice coils are connected through protruding parts, so that the multiple voice coils form an integral structure, thereby improving the rigidity of the diaphragm assembly of the multi-voice-coil loudspeaker monomer, improving the vibration segmentation phenomenon (the phenomenon that each voice coil vibrates out of step) of the loudspeaker monomer, improving the high-frequency cutoff frequency of FR, and thereby improving the acoustic performance of the multi-voice-coil loudspeaker monomer.

[0012] The magnetic circuit assembly in the multi-voice-coil loudspeaker monomer does not need to be thinned, and the total length of the voice coil in the magnetic field is increased, thereby improving the BL value of the multi-voice-coil loudspeaker, improving the sensitivity of the multi-voice-coil loudspeaker monomer, and further improving the acoustic performance of the multi-voice-coil loudspeaker monomer.

[0013] The middle paste in the multi-voice-coil loudspeaker monomer does not need to be thickened, thereby facilitating the thin and light of the multi-voice-coil loudspeaker monomer. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0015] Figure 1 FIG. 1 is a structural schematic diagram of the internal structure of the multi-voice-coil loudspeaker monomer of the embodiment one of the present application;

[0016] Figure 2 FIG. 2 is a top view of the structure shown in FIG. 1; Figure 1

[0017] Figure 3 FIG. 3 is an enlarged view of position A in FIG. 2; Figure 2

[0018] Figure 4 FIG. 4 is a structural schematic diagram of the internal structure of the multi-voice-coil loudspeaker monomer of the embodiment one of the present application;

[0019] Figure 5 FIG. 5 is a top view of the structure shown in FIG. 4; Figure 4

[0020] Figure 6 FIG. 6 is an enlarged view of position B in FIG. 5. Figure 5 BRIEF DESCRIPTION OF DRAWINGS

[0021] 1, spider;

[0022] 1, spider;

[0023] ​​​21, yoke; 22, center magnetic assembly; 23, side magnetic assembly; 24, magnetic conductive structure; 241, tip; 242, additional mu-metal;

[0024] 3, voice coil; 31, adjacent side; 32, protrusion;

[0025] 4, gap;

[0026] 5, recess. DETAILED DESCRIPTION

[0027] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] It should be noted that if the embodiments of the present application involve directionality indications such as up, down, left, right, front, back, etc., the directionality indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, such as shown in the accompanying drawings. If the specific posture changes, the directionality indications also change accordingly.

[0030] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0031] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution, or the solution, or the solution that satisfies both. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0032] In this application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like, should be construed broadly and do not necessarily mean fixedly connected, but can also mean detachably connected, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0033] Embodiment one

[0034] Please refer to Figures 1 to 3 Embodiment one of the present application is: multi-coil speaker unit, which can be applied to mobile phones, tablets, laptops, smart watches, game controllers, hearing aids, AR / VR devices and other electronic devices.

[0035] The multi-coil speaker unit comprises a frame 1, a diaphragm assembly (not shown in the figure), a magnetic circuit assembly and a plurality of voice coils 3, the diaphragm assembly and the magnetic circuit assembly are connected to the frame 1 respectively; in this embodiment, the diaphragm assembly comprises a sound film and a middle paste provided on the sound film, the middle paste is connected to the voice coil 3, in other embodiments, it is also feasible that the sound film is connected to the voice coil 3, in addition, in some embodiments, the diaphragm assembly does not have the middle paste, and it is also feasible that only the sound film is provided; the magnetic circuit assembly comprises a yoke 21 and a center magnetic assembly 22, an edge magnetic assembly 23 and a magnetic conductive structure 24 provided on the yoke 21 respectively, the center magnetic assembly 22 comprises a center magnetic steel and a center dust core, the center magnetic steel is located between the center dust core and the yoke 21 and is connected to the center dust core and the yoke 21 respectively, the edge magnetic assembly 23 comprises an edge magnetic steel and an edge dust core, the edge magnetic steel is located between the edge dust core and the yoke 21 and is connected to the edge dust core and the yoke 21 respectively, the center magnetic assembly 22, the edge magnetic assembly 23 and the magnetic conductive structure 24 are all located on the side of the yoke 21 close to the diaphragm assembly, specifically, the center magnetic assembly 22 is arranged corresponding to the hollow area of the voice coil 3, and the edge magnetic assembly 23 is arranged corresponding to the outside of the voice coil 3.

[0036] At least one of the two adjacent edges 31 of the two adjacent voice coils 3 has a protruding portion 32 protruding towards the other adjacent edge 31, the protruding portion 32 is connected to the other adjacent edge 31 to form a connecting portion; the two adjacent voice coils 3 have two connecting portions, and the two connecting portions and the two adjacent edges 31 form a four-enclosed gap 4, and the magnetic conductive structure 24 is arranged corresponding to the gap 4.

[0037] In the embodiment, the two ends of the two adjacent side edges 31 of the two adjacent voice coils 3 are provided with the protruding portions 32, and the protruding portions 32 on the two adjacent voice coils 3 are connected one by one. In order to facilitate the processing and manufacturing of the voice coil 3, the contour size of each voice coil 3 is preferably the same, that is, in the embodiment, the two adjacent voice coils 3 are mirror-symmetrical. In other embodiments, the contour sizes of the protruding portions 32 on the two adjacent voice coils 3 are different, which can be set according to actual needs.

[0038] In addition, in some embodiments, the two adjacent side edges 31 of the two adjacent voice coils 3 are respectively provided with one protruding portion 32, and the two protruding portions 32 are away from each other, which is also a feasible setting mode. At this time, the overall contour of the two adjacent voice coils 3 respectively presents an L-shaped type.

[0039] In order to ensure the bonding strength between the two adjacent voice coils 3, it is preferred that the outer wall surface of the protruding portion 32 close to the other side edge 31 is a plane, that is, the protruding portion 32 and the other side edge 31 realize face-to-face connection and fixation. Alternatively, the protruding portion 32 and the other side edge 31 are connected through a glue structure, which includes but is not limited to glue, double-sided adhesive tape, etc. Moreover, when the voice coil 3 is wound by an enameled wire, the protruding portion 32 and the other side edge 31 can be connected and fixed through the self-adhesive layer on the surface of the enameled wire.

[0040] In order to reduce the material cost and the processing cost, and improve the structural stability of the multi-voice coil loudspeaker unit, in the embodiment, the magnetic guide structure 24 is a stamping convex bump integrally processed and formed with the yoke 21, that is, the magnetic guide structure 24 is a part of the yoke 21. In the actual processing process, the magnetic guide structure 24 can be formed by stamping the local area of the yoke 21 through stamping forming process.

[0041] Further, the inner side wall of the connecting portion has a recessed portion 5 recessed away from the gap 4, from a certain angle, the recessed portion 5 is a part of the gap 4 (or in other words, the recessed portion 5 communicates with the gap 4), the end of the magnetic conductive structure 24 has a sharp portion 241 corresponding to the recessed portion 5, and the sharp portion 241 is directed to the recessed portion 5. To be specific, since the voice coil 3 is wound by wire, the recessed portion 5 is formed at the connection between the protruding portion 32 on one adjacent side 31 and the other adjacent side 31 of the two adjacent voice coils 3, and the sharp portion 241 is formed at the end of the magnetic conductive structure 24 corresponding to the recessed portion 5. Thus, the recessed portion 5 can be fully utilized, and the magnetic field of the multi-voice coil loudspeaker unit is further strengthened, and the BL value of the multi-voice coil loudspeaker unit is further improved. Although the overall volume of the sharp portion 241 may be small, for some loudspeaker products, especially for miniature loudspeaker products, the slight increase in the B value of the magnetic circuit assembly is the goal pursued by those skilled in the art.

[0042] Embodiment two

[0043] Please refer to Figures 4 to 6 Embodiment two of the present application is a multi-voice coil loudspeaker unit, which can be applied to electronic devices such as mobile phones, tablet computers, notebook computers, smart watches, game controllers, hearing aids, AR / VR devices, etc.

[0044] The multi-voice coil loudspeaker unit comprises a basket 1, a diaphragm assembly, a magnetic circuit assembly and a plurality of voice coils 3, and the diaphragm assembly and the magnetic circuit assembly are connected to the basket 1. In this embodiment, the diaphragm assembly comprises a sound film and a middle pad provided on the sound film, and the middle pad is connected to the voice coil 3. In other embodiments, the sound film can also be connected to the voice coil 3. In addition, in some embodiments, the diaphragm assembly does not have the middle pad, and only the sound film is also feasible. The magnetic circuit assembly comprises a yoke 21 and a center magnetic assembly 22, an edge magnetic assembly 23 and a magnetic conductive structure 24 provided on the yoke 21, respectively. The center magnetic assembly 22 comprises a center magnetic steel and a center dust shield, and the center magnetic steel is located between the center dust shield and the yoke 21 and is connected to the center dust shield and the yoke 21, respectively. The edge magnetic assembly 23 comprises an edge magnetic steel and an edge dust shield, and the edge magnetic steel is located between the edge dust shield and the yoke 21 and is connected to the edge dust shield and the yoke 21, respectively. The center magnetic assembly 22, the edge magnetic assembly 23 and the magnetic conductive structure 24 are all located on the side of the yoke 21 close to the diaphragm assembly. Specifically, the center magnetic assembly 22 is arranged corresponding to the hollow area of the voice coil 3, and the edge magnetic assembly 23 is arranged corresponding to the outer side of the voice coil 3.

[0045] At least one of the two adjacent sides 31 of two adjacent voice coils 3 has a protrusion 32 that protrudes toward the other adjacent side 31, and the protrusion 32 connects to the other adjacent side 31 to form a connecting part; two adjacent voice coils 3 have two connecting parts, and the two connecting parts and the two adjacent sides 31 together form a closed gap 4, and the magnetic conductive structure 24 is provided corresponding to the gap 4.

[0046] In this embodiment, both ends of the two adjacent sides 31 of two adjacent voice coils 3 have protrusions 32, and the protrusions 32 on two adjacent voice coils 3 are connected one-to-one. To facilitate the manufacturing of the voice coils 3, it is preferable that the outline dimensions of each voice coil 3 are the same, that is, in this embodiment, two adjacent voice coils 3 are mirror-symmetrical. In other embodiments, it is also feasible for the outline dimensions of the protrusions 32 on two adjacent voice coils 3 to be different, which can be set according to actual needs.

[0047] In addition, in some embodiments, each of the two adjacent sides 31 of two adjacent voice coils 3 has a protrusion 32, and the two protrusions 32 are far apart from each other. In this case, the overall outline of the two adjacent voice coils 3 is L-shaped.

[0048] To ensure the bonding strength between two adjacent voice coils 3, it is preferable that the outer wall surface of the protrusion 32 near the other adjacent side 31 is flat, that is, the protrusion 32 and the other adjacent side 31 are connected and fixed surface to surface. Optionally, the protrusion 32 and the other adjacent side 31 are connected by an adhesive structure, which includes, but is not limited to, glue, double-sided tape, etc. Moreover, when the voice coil 3 is wound with enameled wire, the protrusion 32 and the other adjacent side 31 can be connected and fixed by a self-adhesive layer on the surface of the enameled wire.

[0049] In this embodiment, the magnetic guiding structure 24 includes an additional magnet (not shown in the figure), which is fixed to the yoke 21. Preferably, the magnetic guiding structure 24 also includes an additional washer 242. Specifically, the additional washer 242 is connected to the additional magnet and is located on the side of the additional magnet away from the yoke 21.

[0050] Further, the inner side wall of the connecting portion has a recessed portion 5 recessed away from the gap 4. In some aspects, the recessed portion 5 is part of the gap 4 (or the recessed portion 5 communicates with the gap 4). The end of the magnetic conductive structure 24 has a sharp portion 241 corresponding to the recessed portion 5, and the sharp portion 241 is directed towards the recessed portion 5. In detail, since the voice coil 3 is wound by wire, the recessed portion 5 is formed at the joint of the convex portion 32 on one adjacent side 31 and the other adjacent side 31 of the two adjacent voice coils 3. By forming the sharp portion 241 at the end of the magnetic conductive structure 24 corresponding to the recessed portion 5, the recessed portion 5 can be fully utilized, so that the magnetic field of the multi-voice coil loudspeaker unit is further strengthened, and the BL value of the multi-voice coil loudspeaker unit is further improved. Although the overall volume of the sharp portion 241 can be small, for some loudspeaker products, especially for micro loudspeaker products, the slight increase in the B value of the magnetic circuit assembly is the goal pursued by those skilled in the art.

[0051] In detail, the additional magnetic steel and the additional dust shield 242 both have the sharp portion 241, and preferably the sharp portion 241 of the additional magnetic steel has the same profile size as the sharp portion 241 of the additional dust shield 242.

[0052] Embodiment Three

[0053] Embodiment Three is a parallel technical solution of Embodiment Two, and differs from Embodiment Two in that the magnetic conductive structure does not include an additional magnetic steel.

[0054] In this embodiment, the magnetic conductive structure is a structural member made of a strong magnetic material, and the magnetic conductive structure is connected to the yoke by gluing, welding, riveting or fastening with fasteners. The strong magnetic material includes ferromagnetic material and ferrimagnetic material; the fasteners include but are not limited to screws, buckles, etc.

[0055] In summary, the multi-coil loudspeaker unit provided by the application has the advantages that: the structure is novel, the adjacent edges of the two adjacent voice coils are connected through the protruding part, the multiple voice coils form an integral structure, the rigidity of the diaphragm assembly of the multi-coil loudspeaker unit is improved, the phenomenon of divided vibration (the phenomenon of different vibration of each voice coil) of the loudspeaker unit is improved, the high-frequency cutoff frequency of FR is improved, and the acoustic performance of the multi-coil loudspeaker unit is improved; the magnetic circuit assembly does not need to be thinned, and the total length of the voice coil in the magnetic field is increased, so that the BL value of the multi-coil loudspeaker is improved, the sensitivity of the multi-coil loudspeaker unit is improved, and the acoustic performance of the multi-coil loudspeaker unit is further improved; the middle paste does not need to be thickened, and the thin and light of the multi-coil loudspeaker unit is guaranteed; the magnetic conducting structure has a sharp part, the recessed part of the gap is fully utilized, the B value of the multi-coil loudspeaker unit is further improved, and the acoustic performance of the multi-coil loudspeaker unit is improved to a greater extent.

[0056] The above is only an optional embodiment of the application, and does not limit the patent scope of the application, and any equivalent structural transformation, direct / indirect application in other related technical fields, or the like made according to the application concept of the application and the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. A multi-coil loudspeaker unit, characterized by: The application relates to a loudspeaker, comprising a yoke; a diaphragm assembly connected to the yoke; a plurality of voice coils connected to the diaphragm assembly, at least one of two adjacent edges of two adjacent voice coils has a protrusion protruding towards the other edge, the protrusion is connected to the other edge to form a connecting part; two adjacent voice coils have two connecting parts, and the two connecting parts and the two edges form a closed gap; a magnetic circuit assembly connected to the yoke, the magnetic circuit assembly comprises a yoke and a magnetic guide structure arranged on the yoke, the magnetic guide structure is arranged corresponding to the gap; the inner wall of the connecting part has a recess recessed away from the gap, and the end of the magnetic guide structure has a sharp part arranged corresponding to the recess, and the sharp part is directed towards the recess.

2. The multi-coil speaker unit of claim 1, wherein: Both ends of the two adjacent edges of the two adjacent voice coils have the protrusions, and the protrusions on the two adjacent voice coils are connected one by one.

3. The multi-coil speaker unit of claim 2, wherein: The two adjacent voice coils are mirror-symmetrical.

4. The multi-coil speaker unit of claim 1, wherein: The two adjacent edges of the two adjacent voice coils respectively have one protrusion, and the two protrusions are away from each other.

5. The multi-coil speaker cell of claim 1, wherein: The outer wall surface of the protrusion close to the other edge is a plane.

6. The multi-coil speaker cell of claim 1, wherein: The magnetic guide structure is a stamping convex part integrally formed with the yoke.

7. The multi-coil speaker cell of claim 1, wherein: The magnetic guide structure is a structural member made of a ferromagnetic material, and the magnetic guide structure is connected to the yoke by gluing, welding, riveting or fastening.

8. The multi-coil speaker cell of claim 1, wherein: The magnetic guide structure comprises an additional magnetic steel.

9. The multi-coil speaker cell of claim 8, wherein: The magnetic guide structure further comprises an additional Hua Si connected to the additional magnetic steel and located on the side of the additional magnetic steel away from the yoke.

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