CN220234933U - Multi-voice coil micro loudspeaker - Google Patents

Abstract

The utility model discloses a multi-voice coil micro loudspeaker, which comprises a vibrating diaphragm assembly, a voice coil and a framework, wherein the vibrating diaphragm assembly comprises a sound membrane and a middle paste which are connected; the number of the voice coils is multiple, and the voice coils with the number being multiple are respectively connected with the middle paste; any voice coil is connected with the other voice coil through a framework, and the framework is fixedly connected with the middle paste. The framework for connecting the voice coils is additionally arranged and is adhered to the vibrating diaphragm assembly, so that the voice coils with a plurality of voice coils can be formed into an integral structure, the synchronism among the voice coils is enhanced, the rigidity of the middle paste is equivalent to that of the middle paste, the vibration phenomenon of the vibrating diaphragm assembly is effectively improved, the frequency valley is eliminated or reduced, the effect of improving the high-frequency cut-off frequency of the multi-voice coil miniature loudspeaker is achieved, and the performance of the multi-voice coil miniature loudspeaker is improved. The existence of skeleton can also let voice coil loudspeaker voice coil and vibrating diaphragm subassembly bond more firmly, has strengthened the structural stability of many voice coils miniature speaker, has promoted many voice coils miniature speaker reliability test throughput.

Description

Multi-voice coil micro loudspeaker

Technical Field

The utility model relates to the technical field of electroacoustic transducers, in particular to a multi-voice coil miniature loudspeaker.

Background

There is a multi-voice coil micro-speaker on the market at present, and this multi-voice coil micro-speaker includes the basin frame and locates respectively vibration system and magnetic circuit subassembly on the basin frame, vibration system includes vibrating diaphragm subassembly and locates a plurality of voice coils of fixing on the vibrating diaphragm subassembly.

Because of space limitations, the individual components in the micro-speaker are made relatively thin. When the middle paste of the vibrating diaphragm assembly is thin to a certain extent, the rigidity can be obviously weakened, the vibrating diaphragm assembly is obviously split and vibrated under the drive of a plurality of voice coils, and a frequency valley can appear in the middle and high frequencies of the miniature loudspeaker, so that the cut-off frequency of the high frequencies of the miniature loudspeaker is influenced. In order to overcome the problem, the prior art is to thicken the middle paste, which can increase the height of the micro-speaker, or thin the magnetic circuit components such as the magnetic steel, the washer, the yoke, and the like, which can weaken the magnetic conduction capacity of the magnetic circuit components, so that the sensitivity of the micro-speaker is greatly reduced.

Disclosure of Invention

The technical problems solved by the utility model are as follows: a low thickness high performance multi-voice coil micro speaker is provided.

In order to solve the technical problems, the utility model adopts the following technical scheme: a multi-voice coil micro-speaker comprising:

the vibrating diaphragm assembly comprises a sound membrane and a middle paste which are connected;

the voice coils are multiple in number and are respectively connected with the middle paste;

and any voice coil is connected with the other voice coil through one of the frameworks, and the frameworks are fixedly connected with the middle paste.

Further, the plurality of voice coils are arranged side by side.

Further, two adjacent voice coils are connected through the frame.

Further, the two ends of the voice coil are respectively connected with the framework.

Further, the framework is adhered and fixed with the middle paste.

Further, the framework is fixedly bonded with the voice coil.

Further, the voice coil loudspeaker further comprises a basin frame and a centering support piece, wherein the voice membrane and the centering support piece are respectively connected with the basin frame, and the centering support piece is connected with the voice coil loudspeaker.

Further, the centering support piece is connected with each voice coil.

Further, an avoidance groove for avoiding the framework is formed in the centering support piece.

Further, the voice coil assembly comprises a magnetic circuit assembly, the magnetic circuit assembly comprises a yoke, a plurality of protruding portions and a plurality of side magnetic steels, the protruding portions and the side magnetic steels are respectively arranged on the yoke, the yoke is connected with the basin frame, the protruding portions are respectively arranged in the middle of each voice coil in a corresponding mode, the side magnetic steels are respectively arranged on the outer sides of two long sides of each voice coil in a corresponding mode, and the protruding portions and the yoke are integrally formed into an integral structure.

The utility model has the beneficial effects that: the framework for connecting the voice coils is additionally arranged and is adhered to the vibrating diaphragm assembly, so that the voice coils with a plurality of voice coils can be formed into an integral structure, the synchronism among the voice coils is enhanced, the rigidity of the middle paste is equivalent to that of the middle paste, the vibration phenomenon of the vibrating diaphragm assembly is effectively improved, the frequency valley is eliminated or reduced, the effect of improving the high-frequency cut-off frequency of the multi-voice coil miniature loudspeaker is achieved, and the performance of the multi-voice coil miniature loudspeaker is improved. Meanwhile, the voice coil and the vibrating diaphragm assembly can be firmly bonded due to the existence of the framework, so that the structural stability of the multi-voice coil micro-speaker is enhanced, and the reliability test passing capacity of the multi-voice coil micro-speaker is improved. The thickness of the middle paste does not need to be increased, and the low thickness of the multi-voice coil miniature loudspeaker is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a multi-voice coil micro-speaker according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a multi-voice coil micro-speaker with a hidden magnetic circuit assembly according to a first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a portion of a multi-voice coil micro-speaker according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. a basin stand;

2. a diaphragm assembly; 21. a sound membrane; 22. middle paste;

3. a voice coil;

4. a magnetic circuit assembly; 41. a yoke; 42. edge magnetic steel; 43. bian Huasi;

5. a skeleton;

6. centering support pieces; 61. avoiding the groove.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, if the meaning of "and/or" is presented throughout this document to include three parallel schemes, taking "and/or" as an example, including a scheme, or a scheme that is satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present utility model is as follows: a multi-voice coil micro-speaker can be applied to electronic equipment with a sound playing function such as a mobile phone, a tablet personal computer, a smart watch and a notebook computer.

The multi-voice coil micro-speaker comprises a basin frame 1, and a vibration system and a magnetic circuit assembly 4 which are respectively connected with the basin frame 1, wherein the vibration system comprises a vibrating diaphragm assembly 2 and a plurality of voice coils 3, the vibrating diaphragm assembly 2 comprises a sound membrane 21 and a middle paste 22 which are connected, the sound membrane 21 is connected with the basin frame 1, and the voice coils 3 with a plurality of voice coils are respectively connected with the middle paste 22; the magnetic circuit assembly 4 comprises a yoke 41, a plurality of protruding parts and a plurality of side magnetic steels 42, wherein the protruding parts and the side magnetic steels 42 are respectively arranged on the yoke 41, the yoke 41 is connected with the basin frame 1, the protruding parts are correspondingly arranged in the middle of each voice coil 3, the side magnetic steels 42 are correspondingly arranged on the outer sides of two long sides of each voice coil 3, and specifically, bian Huasi 43 is also included, and Bian Huasi is respectively arranged on each side magnetic steel 42; preferably, the protruding portion and the yoke 41 are integrally formed as a one-piece structure. After the yoke 41 and the protruding portion are integrally formed, a plurality of side magnetic steels 42 are respectively mounted on the yoke 41, bian Huasi 43 are mounted on the side magnetic steels 42 in one-to-one correspondence, and finally the magnetic circuit assembly 4 is magnetized by magnetizing equipment.

The vibration assembly further comprises a framework 5, any voice coil 3 is connected with the other voice coil 3 through one framework 5, and the framework 5 is fixedly connected with the middle paste 22. In detail, the frame 5 is adhesively connected to the voice coil 3 and the center piece 22, respectively. The voice coils 3 with a plurality of voice coils are connected through at least one framework 5 to form an integral structure, so that the structural strength of the middle paste 22 is enhanced to a certain extent, the split vibration phenomenon of the middle paste 22 is improved, meanwhile, the framework 5 is bonded with the middle paste 22, the bonding area of the integral structure and the middle paste 22 can be increased, and the structural stability of a vibration system is improved. Preferably, the skeleton 5 is made of a lightweight material, such as carbon fiber or the like.

In this embodiment, the number of voice coils 3 is identical in size and specification, and the number of voice coils 3 are mounted parallel to each other on the center piece 22. Alternatively, the number of voice coils 3 is two, three, four or even a larger number.

As a preferred embodiment, two adjacent voice coils 3 are connected by the bobbin 5. Preferably, the two ends of the voice coil 3 are respectively connected with the frame 5. Thus, the stress of the voice coil 3 can be balanced, and the split vibration phenomenon of the diaphragm assembly 2 can be further improved. Specifically, the skeleton 5 is located in the outside of the end of the edge magnetic steel 42, and the skeleton 5 is located in the position, so that the layout of parts inside the multi-voice coil micro-speaker is more reasonable, and the original magnetic circuit assembly 4 is not affected.

It should be noted that, in this embodiment, each of the bobbins 5 is connected to two of the voice coils 3, and in other embodiments, the same bobbin 5 may be connected to three, four, or even more voice coils 3 at the same time.

Optionally, the multi-voice coil micro speaker further includes a support assembly, where the support assembly is used to improve polarization and rolling vibration phenomena of the voice coil 3, in this embodiment, the support assembly is a centering support piece 6, the sound membrane 21 and the centering support piece 6 are respectively connected with the basin frame 1, the centering support piece 6 is connected with the voice coil 3, and in detail, a connection position of the voice coil 3 and the centering support piece 6 is far away from the middle paste 22.

For ease of assembly production, it is preferable that the centering support 6 is connected to each of the voice coils 3. In this embodiment, the number of the centering support pieces 6 is two, and two ends of the voice coil 3 are respectively connected with the centering support pieces 6.

The centering support piece 6 is provided with an avoidance groove 61 for avoiding the framework 5, specifically, the centering support piece 6 comprises an inner installation part, a cantilever and an outer installation part which are sequentially connected, the outer installation part is connected with the basin frame 1, the inner installation part is connected with the end part of the voice coil 3, and the avoidance groove 61 is arranged on the inner installation part.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A multi-voice coil micro-speaker, characterized in that: comprising

The vibrating diaphragm assembly comprises a sound membrane and a middle paste which are connected;

the voice coils are multiple in number and are respectively connected with the middle paste;

and any voice coil is connected with the other voice coil through one of the frameworks, and the frameworks are fixedly connected with the middle paste.

2. A multi-voice coil micro-speaker as claimed in claim 1, wherein: the voice coils are arranged side by side.

3. A multi-voice coil micro-speaker as claimed in claim 2, wherein: adjacent two voice coils are connected through the framework.

4. A multi-voice coil micro-speaker as claimed in claim 3, wherein: the two ends of the voice coil are respectively connected with the framework.

5. A multi-voice coil micro-speaker as claimed in claim 1, wherein: the framework is adhered and fixed with the middle paste.

6. A multi-voice coil micro-speaker as claimed in claim 1, wherein: the framework is fixedly bonded with the voice coil.

7. A multi-voice coil micro-speaker as claimed in claim 1, wherein: the voice coil loudspeaker also comprises a basin frame and a centering support piece, wherein the voice membrane and the centering support piece are respectively connected with the basin frame, and the centering support piece is connected with the voice coil loudspeaker.

8. The multi-voice coil micro-speaker of claim 7, wherein: the centering support piece is connected with each voice coil.

9. The multi-voice coil micro-speaker of claim 8, wherein: and an avoidance groove for avoiding the framework is formed in the centering support piece.

10. The multi-voice coil micro-speaker of claim 7, wherein: the voice coil assembly comprises a frame, and is characterized by further comprising a magnetic circuit assembly, wherein the magnetic circuit assembly comprises a yoke, a plurality of protruding parts and a plurality of side magnetic steels which are respectively arranged on the yoke, the yoke is connected with the frame, the protruding parts are respectively and correspondingly arranged at the middle part of the voice coil, the side magnetic steels are respectively and correspondingly arranged at the outer sides of two long sides of the voice coil, and the protruding parts and the yoke are integrally formed into an integral structure.