WO2020062697A1 - Speaker module, and mobile terminal - Google Patents

Abstract

Disclosed are a speaker module and a mobile terminal. The speaker module comprises: a housing having an accommodating cavity therein; a speaker unit installed within the accommodating cavity and dividing the accommodating cavity into a front sound cavity and a rear sound cavity; and an annular separator installed at the rear sound cavity and surrounding the speaker unit at a peripheral side thereof, the annular separator dividing the rear sound cavity into a vibration cavity at an inner side of the annular separator and a sound absorbing cavity at an outer side of the annular separator, and the annular separator having an air-passable structure communicating the sound absorbing cavity and the vibration cavity. The speaker unit is disposed at the vibration cavity. The sound absorbing cavity is filled with a sound absorbing material. The speaker module of the present invention enables high manufacturing efficiency, provides the sound absorbing cavity having a large effective volume, and achieves superior acoustic performance.

Description

Speaker module and mobile terminal Technical field

The utility model relates to the technical field of electro-acoustics, in particular to a speaker module and a mobile terminal.

Background technique

With the advent of the mobile Internet era, the number of mobile terminals continues to rise, and high-quality music functions are one of the important functions of mobile terminals. Therefore, speaker modules for playing sounds are widely used in mobile terminals.

In related technologies, mobile terminals, such as mobile phones and tablet computers, are increasingly pursuing ultra-thinness or miniaturization, resulting in smaller and smaller installation spaces for speaker modules, thereby increasing the volume or thickness of speaker modules. It's getting smaller. Under this background, how to improve the acoustic performance of the speaker module in a limited space has become a problem that must be solved.

Utility model content

The main purpose of the utility model is to propose a speaker module, which aims to solve the technical problem of low acoustic performance of the existing speaker module.

To achieve the above object, the present invention proposes a speaker module, including:

A casing having a receiving cavity therein;

A speaker unit installed in the receiving cavity and isolating the receiving cavity into a front acoustic cavity and a rear acoustic cavity; and

A ring-shaped spacer is installed on the rear acoustic cavity and is arranged on the peripheral side of the speaker unit. The ring-shaped spacer isolates the rear acoustic cavity into a vibration cavity located inside the ring-shaped spacer and on the side The sound-absorbing cavity on the outside of the ring-shaped spacer is provided in the vibration cavity, and the sound-absorbing cavity is used to fill sound-absorbing material.

Optionally, the ring-shaped spacer is combined with the shell to form two of the sound-absorbing cavities, and the two sound-absorbing cavities are respectively located on opposite sides of the speaker unit.

Optionally, the ventilation structure is provided at two locations corresponding to the two sound absorption chambers.

Optionally, the annular spacer includes an annular partition, and the ventilation structure includes a plurality of ventilation holes opened on the annular partition; or

The ring-shaped spacer includes a ring-shaped partition frame, and the ventilation structure includes a vent opening provided on the ring-shaped partition frame and a ventilation member installed on the air-port of the ring-shaped partition frame.

Optionally, the annular partition is provided as a metal plate; or

The breather is integrally injection-molded with the annular partition frame.

Optionally, a retaining wall structure is provided on the housing at a position corresponding to the annular spacer, and the retaining wall structure is configured to clamp and fix at least part of the annular spacer.

Optionally, the casing includes a front cover, a middle casing, and a rear cover. The middle casing is provided with a single mounting hole, and the speaker unit is installed in the single mounting hole. The middle shell and the front cover collectively surround the front acoustic cavity, and the speaker unit, the middle shell, the rear cover, and the front cover collectively surround the rear acoustic cavity.

Optionally, one of the middle shell and the back cover is provided with a first barrier wall and a second barrier wall in a direction close to the other, and the first barrier wall and the second barrier wall are spaced apart from each other; The first barrier wall and the second barrier wall constitute the barrier wall structure, and the annular spacer is snapped between the first barrier wall and the second barrier wall.

Optionally, the first retaining wall and the second retaining wall are both arranged in a ring shape; or

The first retaining wall and the second retaining wall both extend along the setting direction of the annular spacer and extend a preset length; or

A plurality of the first blocking walls are provided at intervals in the circumferential direction of the annular spacer, and / or a plurality of the second blocking walls are provided at intervals in the circumferential direction of the annular spacer.

Optionally, a first guiding structure is provided at the free end of the first retaining wall, and / or a second guiding structure is provided at the free end of the second retaining wall.

Optionally, the first guide structure includes a first guide surface, the first guide surface is provided at a free end of a side of the first blocking wall facing the second blocking wall, and the first guiding surface is The inclined wall extends away from the second blocking wall; and / or

The second guiding structure includes a second guiding surface provided at a free end of the second blocking wall facing a side surface of the first blocking wall, and the second guiding surface is far from the first The direction of a retaining wall extends obliquely. The utility model also provides a mobile terminal including a speaker module. The speaker module includes:

A casing having a receiving cavity therein;

A speaker unit installed in the receiving cavity and isolating the receiving cavity into a front acoustic cavity and a rear acoustic cavity; and

A ring-shaped spacer is installed on the rear acoustic cavity and is arranged on the peripheral side of the speaker unit. The ring-shaped spacer isolates the rear acoustic cavity into a vibration chamber located inside the ring-shaped spacer and the vibration cavity. The sound-absorbing cavity on the outside of the ring-shaped spacer is provided in the vibration cavity, and the sound-absorbing cavity is used to fill sound-absorbing material.

The speaker module of the present utility model is provided with a ring-shaped spacer to isolate the rear acoustic cavity into a vibration cavity and a sound-absorbing cavity, and the sound-absorbing cavity is filled with a sound-absorbing material, thereby improving the acoustic performance of the speaker module. Moreover, locating the sound-absorbing cavity ring on the peripheral side of the speaker unit can increase the utilization rate of the sound-absorbing material, thereby improving the sound-absorbing effect of the sound-absorbing material, and thus increasing the effective volume of the sound-absorbing cavity, so that it can be implemented in a limited space. The acoustic performance of the speaker module is further improved. In addition, by providing an independent ring-shaped spacer, the assembling process between the ventilation spacer and the casing can be simplified, thereby improving the production efficiency of the speaker module. Therefore, the speaker module of the utility model has high production efficiency, a large effective volume of the sound absorption cavity, and excellent acoustic performance.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structure shown in the drawings without paying any creative work.

FIG. 1 is a schematic diagram of an explosion structure of a speaker module according to an embodiment of the present invention; FIG.

2 is a schematic structural diagram of a ring-shaped spacer in FIG. 1;

3 is a schematic diagram of the internal structure of the speaker module in FIG. 1;

FIG. 4 is a partially enlarged view at A in FIG. 3; FIG.

5 is a schematic cross-sectional structure diagram of the speaker module in FIG. 4;

FIG. 6 is a partially enlarged view of a portion B in FIG. 5.

BRIEF DESCRIPTION OF THE DRAWINGS

Label	name	Label		name
100	Speaker module	211	Diaphragm
10	shell	212	Voice coil
11	The front cover	twenty two	Magnetic circuit system
12	Middle shell	30	Ring spacer
121	Single mounting hole	31	Ring partition
122	First retaining wall	311	Vent
1221	First guide surface	50	Containment cavity
123	Second retaining wall	51	Front acoustic cavity
124	Through hole	52	Rear acoustic cavity
13	Back cover	521	Vibration chamber
20	Speaker unit	522	Sound-absorbing cavity
twenty one	Vibration system	Zh	Zh

The realization of the purpose, functional characteristics and advantages of the present invention will be further described with reference to the embodiments and the drawings.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them. Examples. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative labor shall fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, etc.) in the embodiment of the present utility model, the directional indication is only used to explain in a specific posture (such as the drawing (Shown) The relative positional relationship, motion, etc. of the components under the direction, if the specific posture changes, the directionality indication will change accordingly.

In addition, if there is a description related to "first", "second", etc. in the embodiment of the present utility model, the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as an indication or Imply its relative importance or implicitly indicate the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three side-by-side schemes, taking "A and / or B" as examples, including scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on those that can be realized by a person of ordinary skill in the art. When the combination of technical solutions conflicts or cannot be realized, such a combination of technical solutions should be considered nonexistent , Is not within the scope of protection required by this utility model.

The utility model proposes a speaker module.

In an embodiment of the present invention, as shown in FIGS. 1 to 6, the speaker module 100 includes:

A casing 10 having a receiving cavity 50 therein;

The speaker unit 20 is installed in the receiving cavity 50 and isolates the receiving cavity 50 into a front acoustic cavity 51 and a rear acoustic cavity 52; and

A ring-shaped spacer 30 is installed on the rear acoustic cavity 52 and is arranged on the peripheral side of the speaker unit 20. The ring-shaped spacer 30 isolates the rear acoustic cavity 52 into a vibration cavity 521 located inside the ring-shaped spacer 30 and a ring-shaped spacer. The sound absorption cavity 522 outside the 30, the ring-shaped spacer 30 has a ventilation structure connecting the sound absorption cavity 522 and the vibration cavity 521, the speaker unit 20 is installed in the vibration cavity 521, and the sound absorption cavity 522 is used for filling sound absorption material.

Specifically, the speaker unit 20 is a speaker, which includes a vibration system 21 and a magnetic circuit system 22, wherein the vibration system 21 includes a diaphragm 211 and a voice coil 212. The ring-shaped spacer 30 is a separate ventilation block member.

It can be understood that the speaker module 100 of the present invention can improve the performance of the speaker module 100 by providing a ring-shaped spacer 30 to isolate the rear acoustic cavity 52 into a vibration cavity 521 and a sound absorption cavity 522, and filling the sound absorption cavity 522 with sound-absorbing materials. Acoustic performance. In addition, arranging the sound absorption cavity 522 on the peripheral side of the speaker unit 20 can improve the utilization rate of the sound absorption material, thereby improving the sound absorption effect of the sound absorption material, and thereby increasing the effective volume of the sound absorption cavity 522, which can be achieved in The acoustic performance of the speaker module 100 is further improved in a limited space. On the other hand, the miniaturization design of the speaker module 100 can also be realized.

In addition, by providing an independent ring-shaped spacer 30, the assembling process between the ventilation isolation member and the housing 10 can be simplified, and the production efficiency of the speaker module 100 can be improved.

Therefore, the speaker module 100 of the present invention has high production efficiency, a large effective volume of the sound absorption cavity 522, and excellent acoustic performance.

Further, as shown in FIG. 3 to FIG. 6, the ring-shaped spacer 30 is combined with the casing 10 to form two sound-absorbing cavities 522, and the two sound-absorbing cavities 522 are respectively provided on opposite sides of the speaker unit 20. . In this way, while ensuring the acoustic performance of the speaker module 100, the structure of the speaker module 100 can also be simplified, which is beneficial to reducing the volume of the speaker module 100.

Specifically, as shown in FIG. 3, on the other two sides of the speaker unit 20 (ie, the two sides adjacent to the sound-absorbing cavity 522), the ring-shaped spacer 30 is disposed close to the side wall of the housing 10 to form Two sound-absorbing cavities 522.

In particular, the sound-absorbing materials filled in the two sound-absorbing cavities 522 may be the same or different.

Further, as shown in FIG. 2, the ventilation structure is provided at two locations corresponding to the two sound absorption chambers 522 respectively. In this way, the structure of the ring-shaped spacer 30 can be simplified, processing and manufacturing are facilitated, and the structural strength of the ring-shaped spacer 30 can be ensured.

Of course, the ventilation structure may also be provided throughout the annular spacer 30.

In a specific embodiment, the ring-shaped spacer 30 may be provided in other rings such as a circular ring, a square ring, or an elliptical ring, which is not limited in the present invention.

Optionally, the ring-shaped spacer 30 is provided in a square ring shape or a square-like ring shape, which can be easily matched with the speaker unit 20, thereby making use of the limited space in the housing 10.

In a specific embodiment, the ring-shaped spacer 30 may be set as a closed ring or a ring with an opening.

In a specific embodiment, the sound absorbing material includes sound absorbing particles, such as zeolite particles.

Further, as shown in FIG. 2, the ring-shaped spacer 30 includes a ring-shaped partition plate 31, and the ventilation structure includes a plurality of ventilation holes 311 formed on the ring-shaped partition plate 31. In this way, the rear sound cavity 52 can be separated into the vibration cavity 521 and the sound absorption cavity 522 by providing the annular partition 31, and the sound absorption cavity 522 and the vibration cavity 521 can be connected by providing the ventilation hole 311. Moreover, through the above-mentioned structural arrangement, the ring-shaped spacer 30 can be made simple in structure and convenient to manufacture.

It can be understood that the ventilation structure should only allow gas to pass, but not sound-absorbing materials and the like, that is, the ventilation structure has the characteristics of a ventilation barrier. Therefore, when the sound absorbing material is a sound absorbing particle, the size of the sound absorbing particle should be larger than the size of the vent hole 311.

In this embodiment, as shown in FIG. 2, the vent hole 311 is provided corresponding to two sound-absorbing cavities 522. Specifically, the annular partition plate 31 is provided with a plurality of ventilation holes 311 corresponding to one of the sound absorption cavities 522, and is also provided with a plurality of ventilation holes 311 corresponding to the other sound absorption cavity 522. In this way, not only the structural strength of the annular separator 31 can be ensured, but also the processing difficulty of the annular separator 31 can be reduced, and the production efficiency can be improved.

Further, as shown in FIG. 2, the plurality of ventilation holes 311 provided corresponding to the sound absorption cavity 522 are evenly distributed, or are distributed according to a preset rule. In this way, the sound absorption effect can be improved.

Optionally, the plurality of vent holes 311 provided in the sound-absorbing cavity 522 are arranged in N rows * M columns, and the spacing between the rows is equal, and the spacing between the columns is also equal.

Optionally, the plurality of vent holes 311 provided corresponding to the sound absorption cavity 522 are arranged in N rows, and the vent holes 311 between adjacent rows are staggered.

In particular, in other embodiments, the ventilation holes 311 may be provided all over the annular partition 31.

In this embodiment, the annular partition plate 31 is configured as a metal plate.

Specifically, the annular partition plate 31 may be injection-molded, may also be formed by bending a stamped part, or may be formed by bending a profile.

In other embodiments, the material of the annular partition plate 31 may also be set to other non-metallic materials. For example, the annular partition plate 31 may be a plastic plate and injection molded.

In a second embodiment of the ring-shaped spacer 30, the ring-shaped spacer 30 includes a ring-shaped partition frame, and the ventilation structure includes a ventilation opening opened on the ring-shaped partition frame and a ventilation hole installed on the ring-shaped partition frame. Pieces. In this way, by arranging the air-permeable member on the ring bulkhead, it is convenient to install the air-permeable member, which can save costs and facilitate mass production.

In this embodiment, there may be two air vents, and the two air vents are respectively corresponding to the two sound absorption chambers 522, and each air vent is provided with a ventilation member. Alternatively, the ventilation port may be provided with two groups, each group of ventilation ports includes a plurality of ventilation ports, and the two groups of ventilation ports are respectively corresponding to two sound-absorbing chambers 522, and each group of ventilation ports is provided with a ventilation member. Alternatively, the ventilation port may be provided with two groups, each group of ventilation ports includes a plurality of ventilation ports, and the two groups of ventilation ports are respectively provided corresponding to two sound absorption chambers 522, and each ventilation port is provided with a ventilation member. Of course, the air vents may also be provided as one with the ring bulkhead extending; or, the air vents may also be provided along the circumferential direction of the ring bulkhead and spread throughout the ring bulkhead; correspondingly, ventilation is provided Pieces.

In this embodiment, the annular partition frame may be a metal frame. At this time, the annular partition frame may be injection-molded, may also be formed by stamping parts bending, and may also be formed by profile bending. The frame may also be provided with other non-metallic materials. For example, the annular partition frame may be a plastic frame and injection molded.

In this embodiment, specifically, the air-permeable member is integrally injection-molded with the annular partition frame. In this way, the connection strength (that is, the firmness of the coupling) of the air-permeable member and the annular partition frame can be increased, so that the durability of the annular spacer 30 can be enhanced.

Of course, in this embodiment, the air-permeable member and the ring bulkhead may also be connected by double-sided adhesive, or other methods, such as other gluing methods, or ultrasonic welding methods, or hot-melt methods, etc., which are different here. One more detail.

In this embodiment, in order to improve the firmness of the combination of the air-permeable member and the ring bulkhead and reduce the risk of the air-permeable member detaching from the ring bulkhead, the air-permeable member may be provided on the side of the ring bulkhead near the sound-absorbing cavity 522. In order to increase the volume of the sound absorbing cavity 522 and further improve the acoustic performance of the speaker module 100, the air-permeable member may be disposed on a side of the ring bulkhead near the vibration cavity 521. The above two design methods can be selected according to actual needs. Of course, in order to further reduce the risk of detachment of the air-permeable member from the ring bulkhead, the ring-shaped bulkhead may be set as two sub-frames spliced together, and the air-permeable member is sandwiched between the two sub-frames.

In this embodiment, the air-permeable member may be a non-woven fabric, a mesh fabric, a nylon woven mesh or a metal mesh, or a filter paper, or a DuPont paper, or a coated paper, or a textured paper; but It is not limited to this, as long as it is made of a breathable material or a breathable form, the purpose of the ventilation barrier can be achieved.

Further, in order to simplify the assembly of the ring-shaped spacer 30 with the housing and improve the stability of the assembly, it is preferable that a retaining wall structure may be provided on the housing, and the wall structure may be used to clamp and fix the ring-shaped spacer.

For example, specifically, as shown in FIG. 1 to FIG. 6, the casing 10 includes a front cover 11, a middle casing 12, and a rear cover 13. The middle casing 12 is provided with a single mounting hole 121 and the speaker unit. 20 is mounted in the unit mounting hole 121, the speaker unit 20, the middle shell 12 and the front cover 11 collectively surround the front acoustic cavity 51, and the speaker unit 20, the middle shell 12, the rear cover 13 and the front cover 11 jointly surround成 后 声腔 52。 After the acoustic cavity 52.

It should be noted that, in the present invention, the front cover 11 is disposed opposite to the sound emitting side of the speaker unit 20 (that is, the side where the diaphragm 211 is provided), and the rear cover 13 and the sound emitting side of the speaker unit 20 ( That is, the side on which the diaphragm 211 is provided is disposed opposite to each other.

Specifically, the front cover 11, the middle case 12 and the rear cover 13 are combined to form a receiving cavity 50 for receiving components such as the speaker unit 20. The middle shell 12 is also provided with a through hole 124, which is arranged side by side with the single mounting hole 121. The through hole 124 is used to form the rear acoustic cavity 52.

Further, as shown in FIG. 3 to FIG. 6, one of the middle case 12 and the rear cover 13 is provided with a first blocking wall 122 and a second blocking wall 123 protruding toward the other, and the first blocking wall 122 is spaced apart from the second blocking wall 123, and the annular spacer 30 is latched between the first blocking wall 122 and the second blocking wall 123. In this way, the annular spacer 30 can be fixed in the rear acoustic cavity 52; moreover, the above-mentioned structure is simple and the assembly is convenient.

During installation, the annular spacer 30 can be directly inserted between the first blocking wall 122 and the second blocking wall 123.

Optionally, the width between the first blocking wall 122 and the second blocking wall 123 is equal to, or slightly larger than, or slightly smaller than the thickness of the annular spacer 30 to improve the assembly stability of the annular spacer 30.

In specific embodiments, there are many structural forms and combinations of the first blocking wall 122 and the second blocking wall 123, including but not limited to the following embodiments.

In this embodiment, as shown in FIG. 3 to FIG. 6, the first blocking wall 122 and the second blocking wall 123 both extend along the setting direction of the annular spacer 30 and extend a predetermined length. The preset length can be set according to the size of the casing 10 and considering the assembly stability of the annular spacer 30. That is, the first blocking wall 122 and the second blocking wall 123 both extend a certain length to effectively fix the annular spacer 30. In this way, the structures of the first blocking wall 122 and the second blocking wall 123 are simple, convenient to manufacture, time-saving and material-saving. In this embodiment, optionally, the first blocking wall 122 and the second blocking wall 123 are both arranged in a plate shape.

In a second embodiment of the first blocking wall 122 and the second blocking wall 123, the first blocking wall 122 and the second blocking wall 123 are both arranged in a ring shape. In this embodiment, optionally, the first blocking wall 122 and the second blocking wall 123 are both arranged in a ring plate shape.

In a third embodiment of the first barrier wall 122 and the second barrier wall 123, a plurality of the first barrier walls 122 are provided at intervals in the circumferential direction of the annular spacer 30, and / or, the A plurality of second blocking walls 123 are provided at intervals in the circumferential direction of the annular spacer 30. Specifically, a plurality of the first blocking walls 122 are arranged at intervals in the ring setting direction of the ring-shaped spacer 30, and the second blocking wall 123 is set in a ring shape; A plurality of second blocking walls 123 are arranged at intervals in the circumferential direction of the annular spacer 30; or the first blocking walls 122 are arranged at intervals in the circumferential direction of the annular spacer 30, and A plurality of second blocking walls 123 are provided at intervals in the circumferential direction of the annular spacer 30. Wherein, when a plurality of retaining walls (the first retaining wall 122 or the second retaining arm) are provided, the retaining wall may be provided in a plate shape, a column shape, or a block shape.

Further, in order to facilitate the insertion of the annular spacer 30 between the first blocking wall 122 and the second blocking wall 123, a free end of the first blocking wall 122 is provided with a first guiding structure, and / or, The free end of the second blocking wall 123 is provided with a second guiding structure.

It should be noted that the free end of the barrier wall refers to an end of the barrier wall away from the middle shell 12 / rear cover 13 connected to the barrier wall.

Specifically, in this embodiment, as shown in FIGS. 3 to 6, a first guide structure is provided only at the free end of the first blocking wall 122. In this way, the structure can be simplified. In other embodiments, a second guiding structure may be provided only at the free end of the second blocking wall 123; or, a first guiding structure may be provided at the free end of the first blocking wall 122, and The second end of the two blocking walls 123 is provided with a second guiding structure.

In a specific embodiment, the guide structure may be a guide surface formed based on the retaining wall or a separate guide member.

In this embodiment, as shown in FIGS. 3 to 6, the first guide structure includes a first guide surface 1221, and the first guide surface 1221 is provided on the first blocking wall 122 facing the second blocking wall 123. On the free end of the side surface, the first guide surface 1221 extends obliquely in a direction away from the second blocking wall 123. In this way, the structure of the first guiding structure can be simplified, costs can be reduced, and mass production can be facilitated.

In other embodiments, when the second end of the second blocking wall 123 is provided with a second guiding structure, optionally, the second guiding structure includes a second guiding surface, and the second guiding surface is provided on the second blocking surface. The free end of the wall 123 facing the side surface of the first blocking wall 122, and the second guide surface is arranged to extend obliquely in a direction away from the first blocking wall 122.

Specifically, the two ends of the ring-shaped spacer 30 abut against the middle shell 12 and the rear cover 13 respectively, so that the rear acoustic cavity 52 is divided into a vibration cavity 521 and a sound-absorbing cavity 522, and the sound-absorbing material is prevented from passing through two of the ring-shaped spacer 30 The end side enters the vibration cavity 521.

In this embodiment, as shown in FIG. 3 to FIG. 6, the first blocking wall 122 and the second blocking wall 123 are disposed on the middle case 12 and are protruded in a direction close to the rear cover 13. The first blocking wall 122 and the second blocking wall 123 constitute a blocking wall structure.

Optionally, the first blocking wall 122 and the second blocking wall 123 are integrally injection-molded with the middle shell 12. In this way, the structural stability of the first blocking wall 122 and the second blocking wall 123 can be enhanced.

Specifically, in order to further prevent the sound absorbing material from entering the vibration cavity 521 through both end sides of the ring-shaped spacer 30, the rear cover 13 is provided with an elastic gasket at a position corresponding to the ring-shaped spacer 30, and the ring-shaped spacer 30 stops elastically. For elastic gaskets. Of course, the elastic spacer may also be provided as a part of the annular spacer 30, that is, the annular spacer 30 may further include an elastic spacer, and the elastic spacer is disposed at the end of the annular partition 31 or the annular partition frame.

In other embodiments of the present invention, the ring-shaped spacer 30 may also be fixed by forming a ring-shaped limiting groove on the back cover 13 and / or the middle shell 12, which need not be described in detail here.

Specifically, the casing 10 may also be provided in other structural forms.

For example, in another embodiment of the present invention, the casing 10 includes an upper cover and a lower cover, and the lower cover and the upper cover are combined to form a receiving cavity 50. Wherein, at least one of the lower cover and the upper cover includes a side wall, in a specific embodiment, the upper cover is a plate-like structure, the lower cover includes a bottom wall and the side wall, and the upper cover is connected to the side wall of the lower cover to form RECEPTION CAVITY 50.

In this embodiment, the speaker unit 20 and the upper cover surround a front acoustic cavity 51. The speaker unit 20, the lower cover and the upper cover together form a rear acoustic cavity 52 for improving low-frequency acoustic performance.

In this embodiment, a first blocking wall 122 and a second blocking wall 123 are provided on the upper cover or the lower cover to fix the annular spacer 30. Alternatively, the upper cover and / or the lower cover are provided with annular limiting grooves to fix the annular spacer 30.

The present invention also proposes a mobile terminal. The mobile terminal includes a speaker module. As shown in FIG. 1 to FIG. 6, the specific structure of the speaker module 100 refers to the above embodiments. All the technical solutions of the embodiments have at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be repeated one by one here.

The mobile terminals include, but are not limited to, MP3, MP4, MP5, mobile phones, and tablet computers.

The above are only preferred embodiments of the present invention, and do not therefore limit the scope of the patent of the present invention. Any equivalent structural transformation made using the description of the utility model and the contents of the drawings under the inventive concept of the utility model, or Direct / indirect use in other related technical fields are covered by the patent protection scope of the utility model.

Claims (12)

1. A speaker module, comprising:

   A casing having a receiving cavity therein;

   A speaker unit installed in the receiving cavity and isolating the receiving cavity into a front acoustic cavity and a rear acoustic cavity; and

   A ring-shaped spacer is installed on the rear acoustic cavity and is arranged on the peripheral side of the speaker unit. The ring-shaped spacer isolates the rear acoustic cavity into a vibration chamber located inside the ring-shaped spacer and the vibration cavity. The sound-absorbing cavity on the outside of the ring-shaped spacer is provided in the vibration cavity, and the sound-absorbing cavity is used to fill sound-absorbing material.
2. The speaker module according to claim 1, wherein the ring-shaped spacer is combined with the shell to form two of the sound-absorbing cavities, and the two sound-absorbing cavities are respectively located opposite to the speaker unit. On both sides.
3. The speaker module according to claim 2, wherein the ventilation structure is provided at two locations corresponding to two of the sound absorption chambers.
4. The speaker module according to claim 1, wherein the ring-shaped spacer comprises a ring-shaped partition, and the ventilation structure includes a plurality of ventilation holes opened on the ring-shaped partition; or

   The ring-shaped spacer includes a ring-shaped partition frame, and the ventilation structure includes a vent opening provided on the ring-shaped partition frame and a ventilation member installed on the air-port of the ring-shaped partition frame.
5. The speaker module according to claim 4, wherein the ring-shaped partition is provided as a metal plate; or

   The breather is integrally injection-molded with the annular partition frame.
6. The speaker module according to any one of claims 1 to 5, wherein a wall structure is provided on the casing at a position corresponding to the annular spacer, and the wall structure is configured to at least partially The annular spacer is clamped and fixed.
7. The speaker module according to claim 6, wherein the housing includes a front cover, a middle housing, and a rear cover, and a single mounting hole is opened in the middle housing, and the speaker unit is mounted on the single unit. Body mounting hole, the speaker unit, the middle case, and the front cover collectively surround the front acoustic cavity, and the speaker unit, the middle case, the back cover, and the front cover collectively surround The rear acoustic cavity.
8. The speaker module according to claim 7, wherein one of the middle case and the rear cover is provided with a first blocking wall and a second blocking wall in a direction close to the other, and the first blocking The wall is disposed at a distance from the second barrier wall; the first barrier wall and the second barrier wall constitute the barrier wall structure, and the annular spacer is snapped between the first barrier wall and the second barrier wall.
9. The speaker module according to claim 8, wherein the first blocking wall and the second blocking wall are both arranged in a ring shape; or

   The first retaining wall and the second retaining wall both extend along the setting direction of the annular spacer and extend a preset length; or

   A plurality of the first blocking walls are provided at intervals in the circumferential direction of the annular spacer, and / or a plurality of the second blocking walls are provided at intervals in the circumferential direction of the annular spacer.
10. The loudspeaker module according to claim 8, wherein the free end of the first barrier wall is provided with a first guide structure, and / or the free end of the second barrier wall is provided with a second guide structure. .
11. The speaker module according to claim 10, wherein the first guide structure includes a first guide surface, and the first guide surface is provided on the first blocking wall toward the second blocking wall. The free end of the side, the first guide surface is obliquely extended in a direction away from the second blocking wall; and / or

    The second guiding structure includes a second guiding surface provided at a free end of the second blocking wall facing a side surface of the first blocking wall, and the second guiding surface is far from the first The direction of a retaining wall extends obliquely.
12. A mobile terminal, comprising a speaker module according to any one of claims 1 to 11.

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