Multi-coil double-sided sound production loudspeaker unit

Abstract

The application discloses a multi-sound coil double-side sound emitting loudspeaker monomer, which comprises a vibration assembly, a frame assembly and a magnetic circuit assembly, the vibration assembly comprises a diaphragm assembly and a plurality of sound coils arranged on the diaphragm assembly; the top and the bottom of the frame assembly are respectively connected with the vibration assembly; the magnetic circuit assembly is connected with the frame assembly, the magnetic circuit assembly is located between the two diaphragm assemblies, the magnetic circuit assembly comprises a yoke and a magnetic structure, the top and the bottom of the yoke are respectively provided with the magnetic structure, and the magnetic structure comprises a magnetic conductive structure; in the same vibration assembly, at least one of the two adjacent edges of the two adjacent sound coils has a protruding part which protrudes towards the direction of the other adjacent edge, the protruding part is connected with the other adjacent edge to form a connecting part, the two adjacent sound coils have two connecting parts, the two connecting parts and the two adjacent edges form a gap which is enclosed on four sides, and the magnetic conductive structure is arranged in correspondence with the gap. The multi-sound coil double-side sound emitting loudspeaker monomer has 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 double-sided sound emitting loudspeaker unit. BACKGROUND

[0002] Due to space limitations, each part of the thin loudspeaker needs to be made relatively thin. When the body (also known as the middle paste or ball top) in the diaphragm assembly is thinned to a certain extent, the rigidity will be significantly weakened, and the multiple voice coils in the loudspeaker unit will exhibit more obvious split vibration (voice coil vibration out of sync), resulting in a frequency valley in the mid-high frequency of the loudspeaker unit, thereby affecting the high-frequency cutoff frequency of the loudspeaker unit and causing the acoustic performance of the loudspeaker unit to decline.

[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 on the basis of thickening the 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 double-sided sound emitting 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 double-sided sound emitting loudspeaker unit, comprising:

[0006] a vibration assembly, the vibration assembly comprising a diaphragm assembly and a plurality of voice coils arranged on the diaphragm assembly;

[0007] a yoke assembly, the top and bottom of the yoke assembly being connected with the vibration assembly respectively;

[0008] a magnetic circuit assembly, the magnetic circuit assembly being connected with the yoke assembly, the magnetic circuit assembly being located between two diaphragm assemblies, the magnetic circuit assembly comprising a yoke and a magnetic structure, the top and bottom of the yoke being provided with the magnetic structure respectively, the magnetic structure comprising a magnetic conducting structure;

[0009] In the same vibration assembly, at least one of the two adjacent edges of two adjacent voice coils has a protruding portion protruding towards the other adjacent edge, the protruding portion being connected with the other adjacent edge to form a connecting portion, the two adjacent voice coils having two connecting portions, the two connecting portions and the two adjacent edges forming a gap enclosed on four sides, and the magnetic conducting structure being arranged corresponding to the gap.

[0010] The present application has the following beneficial effects:

[0011] The multi-coil double-surface sound production loudspeaker unit has novel structure, the adjacent edges of the two adjacent voice coils in the same vibration assembly are connected through the protruding part, the multiple voice coils in the same vibration assembly form an integral structure, the rigidity of the vibration assembly is improved, the vibration division phenomenon of the multi-coil double-surface sound production loudspeaker unit (the vibration of the voice coils in the same vibration assembly is not synchronous) is improved, the high-frequency cutoff frequency of FR is improved, and the acoustic performance of the multi-coil double-surface sound production loudspeaker unit is improved.

[0012] The magnetic circuit assembly in the multi-coil double-surface sound production loudspeaker unit 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 double-surface sound production loudspeaker unit is improved, the sensitivity of the multi-coil double-surface sound production loudspeaker unit is improved, and the acoustic performance of the multi-coil double-surface sound production loudspeaker unit is further improved.

[0013] The middle paste in the multi-coil double-surface sound production loudspeaker unit does not need to be thickened, and the thin and light of the multi-coil double-surface sound production loudspeaker unit is guaranteed. 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 based on the drawings shown.

[0015] Figure 1 The structure diagram of the multi-coil double-surface sound production loudspeaker unit of the present application embodiment hidden behind a diaphragm assembly is shown in the figure.

[0016] Figure 2 The structure diagram of the multi-coil double-surface sound production loudspeaker unit of the present application embodiment hidden behind a diaphragm assembly is shown in the figure. Figure 1 The top view of the structure shown in the figure is shown in the figure.

[0017] Figure 3 The structure diagram of the multi-coil double-surface sound production loudspeaker unit of the present application embodiment hidden behind a diaphragm assembly is shown in the figure. Figure 2 The enlarged view of A in the figure is shown in the figure.

[0018] Explanation of reference numerals:

[0019] 1, spider assembly; 11, first spider; 12, second spider;

[0020] 21, yoke; 22, magnetic structure; 221, center magnetic assembly; 222, edge magnetic assembly; 223, magnetic conductive structure; 2231, tip; 2232, additional Hua Si;

[0021] 3, voice coil; 31, adjacent edge; 32, protruding part;

[0022] 4, gap;

[0023] 5. recess;

[0024] 6. diaphragm assembly. DETAILED DESCRIPTION

[0025] The objectives, functional characteristics and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings.

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with 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 the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0027] 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.

[0028] 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.

[0029] 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 solution, solution, or 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 fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0030] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it 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 the present application can be understood according to the specific circumstances.

[0031] Embodiment one

[0032] Please refer to Figures 1 to 3 Embodiment 1 of the present invention is a multi-voice coil double-sided speaker unit, which can be applied to electronic devices such as mobile phones, tablets, laptops, smartwatches, game controllers, hearing aids, and AR / VR devices.

[0033] The multi-voice coil dual-sided loudspeaker unit includes a frame assembly 1, a vibrating assembly, and a magnetic circuit assembly. The top and bottom of the frame assembly 1 are respectively connected to the vibrating assembly. The vibrating assembly includes a diaphragm assembly 6 and multiple voice coils 3 disposed on the diaphragm assembly 6. In this embodiment, the diaphragm assembly 6 includes a diaphragm and a center plate disposed on the diaphragm. The center plate is connected to the voice coils 33. In other embodiments, it is also feasible for the diaphragm to be connected to the voice coils 33. In addition, in some embodiments, it is also feasible for the diaphragm assembly 6 to not have the center plate and only have the diaphragm. The magnetic circuit assembly is connected to the frame assembly 1 and is located between two diaphragm assemblies 6. The magnetic circuit assembly includes a yoke 2. 1. Magnetic structure 22: The top and bottom of the yoke 21 are respectively provided with the magnetic structure 22. The magnetic structure 22 includes a central magnetic component 221, a side magnetic component 222, and a magnetic guiding structure 223. The central magnetic component 221 includes a central magnet and a central washer. The central magnet is located between the central washer and the yoke 21 and connects the central washer and the yoke 21 respectively. The side magnetic component 222 includes a side magnet and a side washer. The side magnet is located between the side washer and the yoke 21 and connects the side washer and the yoke 21 respectively. Specifically, the central magnetic component 221 is provided corresponding to the hollow area of ​​the voice coil 3, and the side magnetic component 222 is provided corresponding to the outer side of the voice coil 3.

[0034] In the same vibrating assembly, 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 223 is provided corresponding to the gap 4.

[0035] In the embodiment, the two ends of the two adjacent side edges 31 of the two adjacent voice coils 3 in the same vibration assembly 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, the two adjacent voice coils 3 in the same vibration assembly are mirror-symmetrical. In other embodiments, the contour sizes of the protruding portions 32 on the two adjacent voice coils 3 in the same vibration assembly are different, which can be set according to actual needs.

[0036] In addition, in some embodiments, the two adjacent voice coils 3 in the same vibration assembly are respectively provided with one protruding portion 32 on the two adjacent side edges 31, 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.

[0037] In order to ensure the bonding strength between the two adjacent voice coils 3 in the same vibration assembly, the outer wall surface of the protruding portion 32 close to the other side edge 31 is preferably a plane, that is, the protruding portion 32 and the other side edge 31 realize the connection and fixation of the plane and the plane. 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 paper and the like. 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.

[0038] Alternatively, the basin frame assembly 1 includes the first basin frame 11 and the second basin frame 12 connected together, the first basin frame 11 is located above the second basin frame 12, one vibration assembly is connected to the first basin frame 11, and another vibration assembly is connected to the second basin frame 12. Preferably, a bayonet for limiting the yoke 21 is formed at the boundary surface of the first basin frame 11 and the second basin frame 12, and part of the yoke 21 is clamped and fixed in the bayonet, which can better fix the magnetic circuit assembly.

[0039] 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 223 has a sharp portion 2231 corresponding to the recessed portion 5, and the sharp portion 2231 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 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 2231 of the end of the magnetic conductive structure 223 is formed corresponding to the recessed portion 5. Thus, the recessed portion 5 can be fully utilized, the magnetic field of the multi-voice coil double-sided sound production speaker unit is further strengthened, and the BL value of the multi-voice coil double-sided sound production speaker unit is further improved. Although the overall volume of the sharp portion 2231 can be small, for some speaker products, especially for miniature speaker products, a slight increase in the B value of the magnetic circuit assembly is the goal pursued by those skilled in the art.

[0040] In the embodiment, the magnetic conductive structure 223 includes an additional magnetic steel (not shown in the figure), and the additional magnetic steel is fixed to the yoke 21. Preferably, the magnetic conductive structure 223 further includes an additional dust shield 2232, and the additional dust shield 2232 is connected to the additional magnetic steel and located on the side of the additional magnetic steel away from the yoke 21.

[0041] In detail, the additional magnetic steel and the additional dust shield 2232 both have the sharp portion 2231, and preferably, the sharp portion 2231 of the additional magnetic steel has the same profile size as the sharp portion 2231 of the additional dust shield 2232.

[0042] Embodiment Two

[0043] Embodiment Two of the present application is a parallel technical solution of Embodiment One, and the difference from Embodiment One is that the magnetic conductive structure does not include an additional magnetic steel.

[0044] In the embodiment, the magnetic conductive structure is a structural member made of a magnetic material, and the magnetic conductive structure is connected to the yoke by gluing, welding, riveting or fastening by a fastener. The magnetic material includes ferromagnetic material and ferrimagnetic material, and the fastener includes but is not limited to screws, buckles and the like.

[0045] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A multi-voice coil, double-sided loudspeaker unit, characterized in that: include A vibration assembly, the vibration assembly including a diaphragm assembly and a plurality of voice coils disposed on the diaphragm assembly; A basin frame assembly, wherein the vibration component is connected to the top and bottom of the basin frame assembly respectively; A magnetic circuit assembly is connected to the frame assembly and is located between the two diaphragm assemblies. The magnetic circuit assembly includes a yoke and a magnetic structure. The top and bottom of the yoke are respectively provided with the magnetic structure, and the magnetic structure includes a magnetically conductive structure. In the same vibrating assembly, at least one of the two adjacent sides of two adjacent voice coils has a protrusion that protrudes toward the other adjacent side. The protrusion connects to the other adjacent side to form a connecting part. Two adjacent voice coils have two connecting parts. The two connecting parts and the two adjacent sides together form a closed gap. The magnetic conductive structure is provided corresponding to the gap. The inner wall of the connector has a recessed portion that is recessed away from the gap, and the end of the magnetically conductive structure has a pointed portion corresponding to the recessed portion, with the pointed portion facing the recessed portion.

2. The multi-voice coil dual-sided loudspeaker unit according to claim 1, characterized in that: In the same vibration assembly, both ends of the two adjacent sides of two adjacent voice coils have the protrusions, and the protrusions on the two adjacent voice coils are connected one-to-one.

3. The multi-voice coil double-sided loudspeaker unit according to claim 2, characterized in that: In the same vibrating assembly, two adjacent voice coils are mirror-symmetrical.

4. The multi-voice coil double-sided loudspeaker unit according to claim 1, characterized in that: In the same vibration assembly, each of the two adjacent sides of two adjacent voice coils has a protrusion, and the two protrusions are far apart from each other.

5. The multi-voice coil dual-sided loudspeaker unit according to claim 1, characterized in that: The outer wall surface of the protrusion near the other adjacent side is flat.

6. The multi-voice coil double-sided loudspeaker unit according to claim 1, characterized in that: The magnetically conductive structure is a structural component made of magnetic material, and the magnetically conductive structure is bonded, welded, riveted, or fastened to the yoke by fasteners.

7. The multi-voice coil double-sided loudspeaker unit according to claim 1, characterized in that: The magnetically conductive structure includes an additional magnet.

8. The multi-voice coil double-sided loudspeaker unit according to claim 7, characterized in that: The magnetically conductive structure also includes an additional washer connected to the additional magnet and located on the side of the additional magnet away from the yoke.

9. The multi-voice coil dual-sided loudspeaker unit according to claim 1, characterized in that: The basin stand assembly includes a first basin stand and a second basin stand connected together, with the first basin stand located above the second basin stand, and a latch for limiting the yoke is formed at the interface between the first basin stand and the second basin stand.

Images