CN219876001U - Acoustic module and earphone - Google Patents

Abstract

The utility model discloses an acoustic module and an earphone, and the earphone especially relates to an intelligent earphone, the acoustic module comprises: the loudspeaker comprises a bracket component and a magnetic circuit component, wherein the bracket component is provided with an installation cavity, the front end part of the bracket component is provided with a sound hole communicated with the installation cavity, the magnetic circuit component is arranged in the installation cavity and comprises a first annular magnet and a second annular magnet which is arranged around the first annular magnet, the first annular magnet surrounds a containing cavity, and the containing cavity is positioned behind the sound hole; and the feedback microphone is arranged in the accommodating cavity, and the pickup hole of the feedback microphone is arranged towards the sound hole. After the acoustic module is applied to the earphone, the feedback microphone does not occupy additional space of the earphone, and miniaturization of the earphone is facilitated.

Description

Acoustic module and earphone

Technical Field

The present utility model relates to the field of audio devices, and in particular, to an acoustic module and an earphone.

Background

With the development of TWS (true wireless stereo, real wireless stereo) headphones, the TWS headphones are gradually miniaturized, and thus, the space occupied by each component inside the headphones is required to be smaller.

In the related art, a TWS earphone having a noise reduction function has been very popular, in which a feedback microphone is disposed right in front of a speaker so that the feedback microphone detects noise in front of the speaker and in an ear canal to achieve noise reduction, but in such a structure, the feedback microphone and the speaker are stacked together to occupy a large space, which limits the miniaturization development of the earphone.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an acoustic module which is beneficial to the miniaturization development of the earphone.

The utility model further provides an earphone with the acoustic module.

An acoustic module according to an embodiment of the first aspect of the present utility model includes: the loudspeaker comprises a bracket assembly and a magnetic circuit assembly, wherein the bracket assembly is provided with an installation cavity, the front end part of the bracket assembly is provided with a sound hole communicated with the installation cavity, the magnetic circuit assembly is arranged in the installation cavity, the magnetic circuit assembly comprises a first annular magnet and a second annular magnet which is arranged around the first annular magnet, a containing cavity is formed around the first annular magnet, and the containing cavity is positioned behind the sound hole; and the feedback microphone is arranged in the accommodating cavity, and the pick-up hole of the feedback microphone faces the sound hole.

The acoustic module according to the embodiment of the utility model has at least the following beneficial effects:

in the acoustic module, the magnetic circuit assembly is arranged in the mounting cavity of the bracket assembly, and the feedback microphone is arranged in the accommodating cavity of the first annular magnet, so that the feedback microphone and the loudspeaker can be combined together, the feedback microphone utilizes the existing space (accommodating cavity) of the first annular magnet, no additional new space is required to be arranged, the manufacturing process is simple, in addition, the feedback microphone is arranged in the accommodating cavity of the first annular magnet, and the feedback microphone is arranged in the loudspeaker in an equivalent manner as a whole, so that the external space of the loudspeaker can not be occupied any more. Therefore, the occupied space of the acoustic module is the occupied space of the loudspeaker, and after the acoustic module is applied to the earphone, the feedback microphone does not occupy the extra space of the earphone any more, so that the earphone is miniaturized.

According to some embodiments of the utility model, the rear end of the bracket assembly is provided with an opening communicating with the accommodating cavity, the horn further comprises a PCB board arranged on the bracket assembly and sealing the opening, and the feedback microphone is arranged on the PCB board.

According to some embodiments of the utility model, the loudspeaker further comprises a vibration assembly disposed inside the mounting cavity, the vibration assembly comprising a diaphragm, and a voice coil connected to the diaphragm, the voice coil disposed in a magnetic circuit between the first annular magnet and the second annular magnet.

According to some embodiments of the utility model, the magnetic circuit assembly further comprises a first magnetizer and a second magnetizer, wherein the first magnetizer is arranged at one end of the first annular magnet close to the sound hole, the second magnetizer is arranged at one end of the second annular magnet close to the sound hole, and the second magnetizer is arranged around the first magnetizer and is spaced from the first magnetizer;

the first magnetizer is provided with a through hole communicated with the accommodating cavity, the vibrating diaphragm is provided with a middle hole, the edge of the middle hole is connected with the first magnetizer, and the edge of the middle hole surrounds one end of the through hole, which is far away from the accommodating cavity.

According to some embodiments of the utility model, the sound pick-up hole of the feedback microphone is disposed toward the through hole.

According to some embodiments of the utility model, an edge of the central bore is sealingly connected to the first magnetizer.

According to some embodiments of the utility model, the outer side wall of the first magnetizer is a first inclined wall, the first inclined wall is inclined towards the second magnetizer gradually from one side close to the first annular magnet to one side far away from the first annular magnet, and/or the inner side wall of the second magnetizer is a second inclined wall, the second inclined wall is inclined towards the first magnetizer gradually from one side close to the second annular magnet to one side far away from the second annular magnet, and the voice coil is arranged between the first magnetizer and the second magnetizer.

According to some embodiments of the utility model, the voice coil is a flat voice coil, and the wire of the flat voice coil forms a spiral structure, and an axis of the spiral structure is coaxially arranged with an axis of the first annular magnet.

According to some embodiments of the utility model, the bracket assembly is further provided with a wire passing hole communicated with the mounting cavity, the wire passing hole faces to a magnetic path gap between the first annular magnet and the second annular magnet, and the loudspeaker further comprises a signal wire penetrating through the wire passing hole and connected with the voice coil.

An earphone according to an embodiment of the second aspect of the utility model comprises an acoustic module as described above.

The earphone according to the embodiment of the utility model has at least the following beneficial effects:

the earphone of the utility model is provided with the acoustic module, in the acoustic module, the magnetic circuit assembly is arranged in the mounting cavity of the bracket assembly, and the feedback microphone is arranged in the accommodating cavity of the first annular magnet, so that the feedback microphone and the loudspeaker can be combined together, the feedback microphone utilizes the existing space (accommodating cavity) of the first annular magnet, no new space is needed to be arranged, the manufacturing process is simple, and in addition, the feedback microphone is arranged in the accommodating cavity of the first annular magnet, which is equivalent to arranging the feedback microphone in the loudspeaker as a whole, and the external space of the loudspeaker is not occupied. Therefore, the occupied space of the acoustic module is the occupied space of the loudspeaker, and after the acoustic module is applied to the earphone, the feedback microphone does not occupy the extra space of the earphone any more, so that the earphone is miniaturized.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic bottom view of an acoustic module according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the graphic of FIG. 1 taken along section A-A;

FIG. 3 is a schematic top view of an acoustic module according to an embodiment of the present utility model;

fig. 4 is a schematic magnetic circuit diagram of a magnetic circuit assembly according to an embodiment of the present utility model.

Reference numerals:

10. a horn; 110. a bracket assembly; 1101. a mounting cavity; 1102. a sound hole; 1103. an opening; 1104. a wire through hole; 1105. a tuning hole; 111. a bracket body; 112. a cover body; 120. a magnetic circuit assembly; 121. a first ring magnet; 1211. a receiving chamber; 122. a second ring magnet; 123. a first magnetizer; 1231. a through hole; 124. a second magnetizer; 130. a vibration assembly; 131. a vibrating diaphragm; 1311. a middle hole; 132. a voice coil; 140. a fixing ring; 150. a PCB board; 160. a tuning net; 20. a feedback microphone.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 3, an acoustic module according to an embodiment of the present utility model includes a speaker 10 and a feedback microphone 20.

As shown in fig. 2, the horn 10 includes a bracket assembly 110 and a magnetic circuit assembly 120.

The bracket assembly 110 is provided with a mounting chamber 1101, and a front end portion of the bracket assembly 110 is provided with a sound hole 1102 communicating with the mounting chamber 1101.

Specifically, the bracket assembly 110 is a hollow structure having a mounting cavity 1101, and a front end portion of the bracket assembly 110 is provided with a sound hole 1102, i.e., the sound hole 1102 is located in front of the mounting cavity 1101.

With reference to fig. 2 and 3, further, the number of the sound holes 1102 is plural, and the plurality of sound holes 1102 are distributed in an array at the front end of the bracket assembly 110.

It is understood that the plurality of sound holes 1102 may be arranged in a circumferential array or may be arranged in a rectangular array.

As shown in fig. 2, the magnetic circuit assembly 120 is disposed inside the mounting chamber 1101, and the magnetic circuit assembly 120 includes a first annular magnet 121, and a second annular magnet 122 disposed around the first annular magnet 121, the first annular magnet 121 being surrounded by a receiving chamber 1211, the receiving chamber 1211 being located behind the sound hole 1102.

Specifically, the first ring magnet 121 and the second ring magnet 122 are both fixed to the inside of the mounting chamber 1101, the second ring magnet 122 is disposed around the first ring magnet 121, and the second ring magnet 122 is disposed coaxially with the first ring magnet 121, of course, the coaxiality of the second ring magnet 122 with the first ring magnet 121 may be allowed within an error range. In addition, since the first ring magnet 121 is of a ring-shaped structure, the first ring magnet 121 surrounds the accommodation chamber 1211, and the accommodation chamber 1211 is located behind the sound hole 1102.

Wherein, the first annular magnet 121 and the second annular magnet 122 are both magnets.

The feedback microphone 20 is disposed in the accommodation chamber 1211, and a sound pickup hole of the feedback microphone 20 is disposed toward the sound hole 1102. In this way, the feedback microphone 20 has the sound hole 1102 in front of the feedback microphone 20, and the feedback microphone 20 can pick up sound in front of the speaker 10 through the sound hole 1102, thereby playing a role of noise reduction.

In the acoustic module of the present utility model, the magnetic circuit assembly 120 is disposed in the mounting cavity 1101 of the bracket assembly 110, and the feedback microphone 20 is disposed in the receiving cavity 1211 of the first ring magnet 121, so that the feedback microphone 20 and the horn 10 can be combined together, and the feedback microphone 20 uses the existing space (receiving cavity 1211) of the first ring magnet 121, without providing a new space, and the manufacturing process is simple, and in addition, by disposing the feedback microphone 20 in the receiving cavity 1211 of the first ring magnet 121, the feedback microphone 20 is disposed in the horn 10 as a whole, and the external space of the horn 10 is not occupied. Thus, for the acoustic module, the occupied space is the occupied space of the loudspeaker 10, so that after the acoustic module is applied to the earphone, the feedback microphone 20 does not occupy the extra space of the earphone, which is beneficial to miniaturization of the earphone.

As shown in fig. 2, in one embodiment, the rear end of the bracket assembly 110 is provided with an opening 1103 that communicates with the receiving cavity 1211, and the speaker 10 further includes a PCB 150, the PCB 150 being disposed on the bracket assembly 110 and sealing the opening 1103, and the feedback microphone 20 being disposed on the PCB 150. In this way, the feedback microphone 20 can be installed into the receiving chamber 1211 through the opening 1103 of the stand assembly 110, and the operation is simple.

Specifically, the opening 1103 on the rear end of the bracket assembly 110 is disposed opposite to the accommodating cavity 1211, the feedback microphone 20 is disposed on the PCB board 150 and electrically connected to the PCB board 150, and the feedback microphone 20 is protected after the opening 1103 is sealed by the PCB board 150 by placing the feedback microphone 20 into the accommodating cavity 1211 and mounting the PCB board 150 onto the bracket assembly 110. In addition, by making the PCB 150 seal the opening 1103, the risk of air leakage can be reduced, and the sound quality effect can be ensured.

The PCB 150 and the bracket assembly 110 may be fixed by screws, snaps, glue, or the like.

In one embodiment, the horn 10 further includes a vibration assembly 130 disposed inside the mounting chamber 1101, the magnetic circuit assembly 120 is configured to drive the vibration assembly 130 to vibrate, such that the horn 10 emits sound, and the sound emitted by the horn 10 may be transmitted outwardly through the sound hole 1102.

Specifically, the vibration assembly 130 includes a diaphragm 131, and a voice coil 132 connected to the diaphragm 131, the voice coil 132 being disposed in a magnetic circuit between the first and second ring magnets 121 and 122. When the voice coil 132 is energized with alternating current of varying magnitude, the voice coil can reciprocate under the influence of the magnetic circuit between the first annular magnet 121 and the second annular magnet 122, thereby driving the diaphragm 131 to vibrate.

It will be appreciated that in the acoustic module of the present utility model, the front end of the first ring magnet 121 is the N pole, the rear end of the first ring magnet 121 is the S pole, the front end of the second ring magnet 122 is the S pole, and the rear end of the second ring magnet 122 is the N pole.

As shown in fig. 2, in one embodiment, the magnetic circuit assembly 120 further includes a first magnetizer 123 and a second magnetizer 124, the first magnetizer 123 is disposed at an end of the first annular magnet 121 near the sound hole 1102, the second magnetizer 124 is disposed at an end of the second annular magnet 122 near the sound hole 1102, in other words, the first magnetizer 123 is disposed at a front end of the first annular magnet 121, and the second magnetizer 124 is disposed at a front end of the second annular magnet 122.

Wherein the second magnetic conductor 124 is disposed around the first magnetic conductor 123 and spaced apart from the first magnetic conductor 123, and the first magnetic conductor 123 and the second magnetic conductor 124 perform a magnetic conduction function, thereby facilitating the voice coil 132 to be immersed in the magnetic circuit between the first annular magnet 121 and the second annular magnet 122.

Specifically, the first magnetizer 123 and the second magnetizer 124 are washer, the first magnetizer 123 and the second magnetizer 124 are ring structures, and the first magnetizer 123, the second magnetizer 124, the first ring magnet 121 and the second ring magnet 122 are coaxially arranged.

Further, the first magnetizer 123 is provided with a through hole 1231 communicated with the accommodating cavity 1211, the diaphragm 131 is provided with a middle hole 1311, the edge of the middle hole 1311 is connected with the first magnetizer 123, and the edge of the middle hole 1311 is arranged around one end of the through hole 1231 away from the accommodating cavity 1211. In this way, the through hole 1231, the middle hole 1311 and the sound hole 1102 are provided in this order in front of the feedback microphone 20, and thus the feedback microphone 20 can pick up sound in front of the horn 10 through the through hole 1231, the middle hole 1311 and the sound hole 1102, thereby playing a role in noise reduction.

Specifically, the sound pickup hole of the feedback microphone 20 is provided toward the through hole 1231. Thus, the feedback microphone 20 can pick up the sound in front of the loudspeaker 10 more accurately, and ensure the noise reduction effect.

Further, the edge of the middle hole 1311 of the diaphragm 131 is hermetically connected to the first magnetizer 123. In this way, the risk of leakage of the diaphragm 131 can be reduced, thereby ensuring the sound quality of the loudspeaker 10.

Specifically, the edge of the middle hole 1311 is bonded to the first magnetizer 123 by glue, and the edge of the middle hole 1311 is sealed to the first magnetizer 123.

Further, referring to fig. 2 and 4, the outer wall of the first magnetizer 123 is a first inclined wall, and the first inclined wall is inclined away from the second magnetizer 124 gradually from the side close to the first annular magnet 121 to the side far from the first annular magnet 121, in other words, the first inclined wall is inclined away from the second magnetizer 124 gradually from the back to the front. The inner side wall of the second magnetizer 124 is a second inclined wall, and the second inclined wall is inclined gradually away from the first magnetizer 123 in a direction from a side close to the second annular magnet 122 to a side far from the second annular magnet 122, in other words, the second inclined wall is inclined gradually away from the first magnetizer 123 from the rear to the front. The voice coil 132 is disposed between the first and second magnetic conductors 123 and 124.

In this way, under the action of the first magnetizer 123 and the second magnetizer 124, the magnetic circuit between the first annular magnet 121 and the second annular magnet 122 can be properly guided upwards and forwards for a certain distance, so that the voice coil 132 is completely immersed into the magnetic circuit between the first annular magnet 121 and the second annular magnet 122, the accuracy of the moving path of the voice coil 132 after being electrified is improved, and the distortion is reduced.

In this embodiment, the voice coil 132 is a flat voice coil, and the wires of the flat voice coil form a spiral structure, and the axis of the spiral structure is coaxial with the axis of the first ring magnet 121. The voice coil 132 is a flat voice coil, and the axis of the spiral structure is coaxial with the axis of the first ring magnet 121, so that the overall height of the loudspeaker 10 can be reduced, and the occupied space can be reduced. Also, in the case where the voice coil 132 is provided as a flat voice coil, it is possible to ensure that the voice coil 132 is immersed in the magnetic circuit between the first ring magnet 121 and the second ring magnet 122.

As shown in fig. 2, in one embodiment, a fixing ring 140 is connected to an outer edge of the diaphragm 131, the bracket assembly 110 includes a bracket body 111 and a cover 112 covering the bracket body 111, and the fixing ring 140 is disposed on the second ring magnet 122 and is pressed by the cover 112.

As shown in fig. 2, in one embodiment, the bracket assembly 110 is further provided with a wire through hole 1104 communicating with the mounting cavity 1101, the wire through hole 1104 faces the magnetic path gap between the first annular magnet 121 and the second annular magnet 122, the speaker 10 further includes a signal wire passing through the wire through hole 1104 and connected to the voice coil 132, and the signal wire is further connected to the PCB board 150. In this manner, the voice coil 132 and the PCB 150 may be electrically connected together using a signal line.

Further, in conjunction with fig. 1 and 2, the bracket assembly 110 is further provided with a tuning hole 1105, and a tuning net 160 is disposed at the tuning hole 1105.

An embodiment of the utility model also relates to a headset comprising an acoustic module as described above.

The earphone of the present utility model has the above-mentioned acoustic module in which the magnetic circuit assembly 120 is disposed in the mounting chamber 1101 of the holder assembly 110 and the feedback microphone 20 is disposed in the accommodation chamber 1211 of the first ring magnet 121, so that the feedback microphone 20 can be coupled with the horn 10, and the feedback microphone 20 uses the existing space (accommodation chamber 1211) of the first ring magnet 121 without additionally providing a new space, and the manufacturing process is simple, and in addition, by disposing the feedback microphone 20 in the accommodation chamber 1211 of the first ring magnet 121, the feedback microphone 20 is disposed in the horn 10 as a whole, and the external space of the horn 10 is not occupied. Thus, for the acoustic module, the occupied space is the occupied space of the loudspeaker 10, so that after the acoustic module is applied to the earphone, the feedback microphone 20 does not occupy the extra space of the earphone, which is beneficial to miniaturization of the earphone.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An acoustic module, comprising:

the loudspeaker comprises a bracket assembly and a magnetic circuit assembly, wherein the bracket assembly is provided with an installation cavity, the front end part of the bracket assembly is provided with a sound hole communicated with the installation cavity, the magnetic circuit assembly is arranged in the installation cavity, the magnetic circuit assembly comprises a first annular magnet and a second annular magnet which is arranged around the first annular magnet, a containing cavity is formed around the first annular magnet, and the containing cavity is positioned behind the sound hole; and

the feedback microphone is arranged in the accommodating cavity, and the pick-up hole of the feedback microphone faces the sound hole.

2. The acoustic module of claim 1 wherein the rear end of the bracket assembly is provided with an opening in communication with the receiving cavity, the horn further comprising a PCB disposed on the bracket assembly and sealing the opening, the feedback microphone being disposed on the PCB.

3. The acoustic module of claim 1 wherein the horn further comprises a vibration assembly disposed within the mounting cavity, the vibration assembly comprising a diaphragm, and a voice coil coupled to the diaphragm, the voice coil disposed in a magnetic circuit between the first annular magnet and the second annular magnet.

4. The acoustic module of claim 3 wherein the magnetic circuit assembly further comprises a first magnetic conductor disposed at an end of the first annular magnet adjacent the acoustic port and a second magnetic conductor disposed at an end of the second annular magnet adjacent the acoustic port, the second magnetic conductor disposed around and spaced apart from the first magnetic conductor;

the first magnetizer is provided with a through hole communicated with the accommodating cavity, the vibrating diaphragm is provided with a middle hole, the edge of the middle hole is connected with the first magnetizer, and the edge of the middle hole surrounds one end of the through hole, which is far away from the accommodating cavity.

5. The acoustic module of claim 4 wherein the pick-up hole of the feedback microphone is disposed toward the through hole.

6. The acoustic module of claim 4 wherein an edge of the central aperture is sealingly connected to the first magnetizer.

7. The acoustic module of claim 4 wherein the outer sidewall of the first magnetic conductor is a first sloped wall that slopes gradually away from the second magnetic conductor in a direction from a side proximate to the first annular magnet to a side distal from the first annular magnet, and/or wherein the inner sidewall of the second magnetic conductor is a second sloped wall that slopes gradually away from the first magnetic conductor in a direction from a side proximate to the second annular magnet to a side distal from the second annular magnet, the voice coil being disposed between the first magnetic conductor and the second magnetic conductor.

8. The acoustic module of claim 7 wherein the voice coil is a flat voice coil and the wires of the flat voice coil form a helical structure, the axis of the helical structure being coaxial with the axis of the first ring magnet.

9. The acoustic module of claim 3 wherein the bracket assembly is further provided with a wire through hole in communication with the mounting cavity, the wire through hole facing a magnetic path gap between the first annular magnet and the second annular magnet, the horn further comprising a signal wire passing through the wire through hole and connected to the voice coil.

10. An earphone comprising an acoustic module as claimed in any one of claims 1 to 9.