CN219999592U - Micro-speaker - Google Patents

Abstract

The utility model discloses a micro loudspeaker, which comprises a yoke, a central magnetic structure and a voice coil, wherein an air flow channel is arranged on the top surface of the yoke; the central magnetic structure is provided with a through hole which is communicated with the air flow passage; the voice coil is arranged corresponding to the central magnetic structure; when the micro-speaker is overlooked, one end of the air flow channel extends to the outer side of the voice coil. When the micro-speaker works, air on the inner side and the outer side of the voice coil can flow smoothly, so that the micro-speaker can drive the voice coil with lower voltage under the condition of the same amplitude, and the heating value of the voice coil is reduced. Because the air circulation of the inner side and the outer side of the voice coil is smooth, the heat in the inner side area of the voice coil can be dissipated to the outer side area of the voice coil more quickly, so that the heat in the micro-speaker can be dissipated to the outside quickly, the heat dissipation performance of the micro-speaker is improved, and the micro-speaker can work stably and reliably for a long time.

Description

Micro-speaker

Technical Field

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

Background

The internal space of the slim micro-speaker is limited because a better bass effect is required, and a large amplitude is often required to improve the bass effect.

The traditional method for increasing the amplitude is to use larger voltage to push the voice coil to vibrate to a larger extent, so that the low frequency of the micro-speaker is improved. The larger voltage can lead the heat productivity of the voice coil of the micro-speaker to be greatly increased, and the heat in the interior of the micro-speaker, especially in the area inside the voice coil, is difficult to dissipate, so that the temperature of the micro-speaker is increased, and the reliability of the micro-speaker is affected.

Disclosure of Invention

The technical problems solved by the utility model are as follows: a large-amplitude micro-speaker with good heat dissipation performance is provided.

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

the top surface of the yoke is provided with an air flow passage;

the central magnetic structure is arranged on the top surface of the yoke, and is provided with a through hole penetrating up and down, and the through hole is communicated with the air flow passage;

a voice coil disposed in correspondence with the central magnetic structure;

when the micro-speaker is overlooked, one end of the air flow channel extends to the outer side of the voice coil.

In an embodiment, the number of the through holes is one, and the through holes are arranged in the center of the central magnetic structure.

In an embodiment, the number of the through holes is a plurality.

In one embodiment, the number of the air flow channels is one.

In one embodiment, the number of air channels is a plurality.

In one embodiment, a plurality of air channels are communicated with each other to form an X-shaped channel.

In an embodiment, the center of the X-shaped channel corresponds to the through hole.

In an embodiment, the voice coil loudspeaker further comprises a basin frame, a side magnetic structure and a vibrating diaphragm assembly, wherein the side magnetic structure is connected with the yoke and the basin frame, and the vibrating diaphragm assembly is connected with the basin frame and the voice coil loudspeaker.

In one embodiment, the basin frame and/or the yoke are/is provided with an air leakage hole communicated with the outside, and one end of the air flow passage is close to the air leakage hole.

In one embodiment, the vent is provided in a corner region of the micro-speaker.

The utility model has the beneficial effects that: the center magnetic structure is provided with a through hole communicated with the top surface and the ground, and the yoke is provided with an air flow passage communicated with the through hole and the outer area of the voice coil, so that the air at the inner side and the outer side of the voice coil can smoothly circulate when the micro-speaker works, and therefore, under the condition of the same amplitude, the micro-speaker can drive the voice coil with lower voltage, and the heating value of the voice coil is reduced.

In addition, because the air circulation inside and outside the voice coil is smooth, the heat in the inside area of the voice coil can be dissipated to the outside area of the voice coil more quickly, so that the heat in the micro-speaker can be dissipated to the outside quickly, the heat dissipation performance of the micro-speaker is improved, and the micro-speaker can work stably and reliably for a long time.

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 cross-sectional view of a micro-speaker according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an internal structure of a micro-speaker according to a first embodiment of the present utility model;

fig. 3 is a schematic diagram of a yoke in a micro speaker according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. a basin stand;

2. a diaphragm assembly;

3. a voice coil;

4. a yoke; 41. an air flow passage;

5. a central magnetic structure; 51. a through hole;

6. a side magnetic structure;

7. and a vent hole.

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 the present utility model, unless explicitly specified 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 above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present utility model is as follows: the micro loudspeaker can be applied to electronic equipment such as mobile phones, tablet computers, intelligent watches, game handles and the like.

The miniature loudspeaker comprises a basin frame 1, a vibration assembly and a magnetic circuit assembly, wherein the vibration assembly and the magnetic circuit assembly are respectively arranged on the basin frame 1, the vibration assembly comprises a vibrating diaphragm assembly 2 and a voice coil 3, the vibrating diaphragm assembly 2 is connected with the basin frame 1 and the voice coil 3, the magnetic circuit assembly comprises a yoke 4 and a central magnetic structure 5 and a side magnetic structure 6 which are respectively arranged on the yoke 4, the side magnetic structure 6 is connected with the basin frame 1, the voice coil 3 is arranged corresponding to the central magnetic structure 5, and a magnetic gap for the voice coil 3 to move is formed between the central magnetic structure 5 and the side magnetic structure 6.

Specifically, the central magnetic structure 5 and the side magnetic structures 6 are respectively arranged on the top surface of the yoke 4, and the central magnetic structure 5 is provided with a through hole 51 penetrating up and down, that is, the through hole 51 is communicated with the top surface and the bottom surface of the central magnetic structure 5; the top surface of the yoke 4 is also provided with an air flow channel 41, the bottom end of the through hole 51 is communicated with the air flow channel 41, and as will be understood, the central magnetic structure 5 covers a partial area of the air flow channel 41.

In a case where the micro-speaker is seen in plan view, one end of the air flow path 41 extends to the outside of the voice coil 3, and in detail, when the micro-speaker is seen in plan view after the diaphragm assembly 2 is removed, the air flow path 41 spans the voice coil 3, that is, one end of the air flow path 41 is located in an area outside the voice coil 3, and the other end of the air flow path 41 is located in an area inside the voice coil 3.

In this embodiment, the central magnetic structure 5 includes a central magnetic steel and a central washer, the bottom surface of the central magnetic steel is connected to the yoke 4, the bottom surface of the central washer is connected to the top surface of the central magnetic steel, and the through hole 51 penetrates through the top surface of the central washer and the bottom surface of the central magnetic steel; the side magnetic structure 6 comprises an annular washer and four side magnetic steels, the four side magnetic steels are respectively arranged corresponding to four sides of the central magnetic steel, the bottom surface of the side magnetic steel is connected with the yoke 4, and the top surface of the side magnetic steel is connected with the annular washer.

In other embodiments, the number of the through holes 51 may be plural, and when the number of the through holes 51 is plural, it is preferable that the through holes 51 are arranged in an array. In this embodiment, the number of the through holes 51 is one, and the through holes 51 are provided in the center of the central magnetic structure 5.

The number of air channels 41 is one or more. In this embodiment, the number of the air channels 41 is plural, specifically, four air channels 41 are mutually communicated to form an X-shaped channel, and the center of the X-shaped channel corresponds to the through hole 51, that is, the communication position between the through hole 51 and the X-shaped channel is located at the center of the X-shaped channel.

The micro-speaker has a vent hole 7 communicating the inside with the outside, the vent hole 7 is disposed on the tub frame 1 and/or the yoke 4, and in general, the vent hole 7 is generally disposed in a corner area of the micro-speaker, so that the hot air inside the voice coil 3 can be dissipated to the outside more rapidly, thereby improving the heat dissipation performance of the micro-speaker to a greater extent, and one end of the air flow path 41 is close to the vent hole 7. Specifically, the gap between two adjacent edge magnetic steels corresponds to the corner area of the micro-speaker, so in this embodiment, each corner of the micro-speaker has one air vent hole 7, and each air vent hole 7 corresponds to one air channel 41, so in this micro-speaker, four air channels 41 are mutually communicated to form an X-shaped channel, so that air can more uniformly enter and exit the inner area of the voice coil 3, which helps to improve the polarization phenomenon of the voice coil 3.

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. Miniature speaker, its characterized in that: comprising

The top surface of the yoke is provided with an air flow passage;

the central magnetic structure is arranged on the top surface of the yoke, and is provided with a through hole penetrating up and down, and the through hole is communicated with the air flow passage;

a voice coil disposed in correspondence with the central magnetic structure;

when the micro-speaker is overlooked, one end of the air flow channel extends to the outer side of the voice coil.

2. A micro-speaker as claimed in claim 1, wherein: the number of the through holes is one, and the through holes are arranged in the center of the central magnetic structure.

3. A micro-speaker as claimed in claim 1, wherein: the number of the through holes is a plurality of.

4. A micro-speaker as claimed in claim 1, wherein: the number of the air flow channels is one.

5. A micro-speaker as claimed in claim 1, wherein: the number of the air channels is a plurality.

6. A micro-speaker as claimed in claim 5, wherein: the air channels with a plurality of air channels are mutually communicated to form X-shaped channels.

7. A micro-speaker as claimed in claim 6, wherein: the center of the X-shaped channel corresponds to the through hole.

8. A micro-speaker as claimed in claim 1, wherein: the voice coil loudspeaker voice coil also comprises a basin frame, a side magnetic structure and a vibrating diaphragm assembly, wherein the side magnetic structure is connected with the yoke and the basin frame, and the vibrating diaphragm assembly is connected with the basin frame and the voice coil loudspeaker voice coil.

9. A micro-speaker as claimed in claim 8, wherein: and the basin frame and/or the yoke iron is provided with an air leakage hole communicated with the outside, and one end of the air flow passage is close to the air leakage hole.

10. A micro-speaker as claimed in claim 9, wherein: the vent hole is arranged in a corner area of the micro-speaker.