CN212727398U

CN212727398U - Speaker module and electronic equipment

Info

Publication number: CN212727398U
Application number: CN202021833643.1U
Authority: CN
Inventors: 张怀省; 张锋; 张福铭; 张娜
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-03-16
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a speaker module and electronic equipment who uses this speaker module. The loudspeaker module comprises a shell, a loudspeaker monomer and a separation cylinder, wherein the loudspeaker monomer is arranged in an inner cavity of the shell and separates the inner cavity of the shell into a front sound cavity and a rear sound cavity, sound absorption particles are filled in the rear sound cavity, the rear sound cavity is provided with a first cavity wall and a second cavity wall which are oppositely arranged, and the first cavity wall is provided with a sound leakage hole; the separation cylinder is located in the back sound intracavity, and protruding locating the second chamber wall, deviating from of separation cylinder the one end orientation on second chamber wall let out the sound hole setting, be used for with inhale the sound granule with let out the sound hole and keep apart. The technical scheme of the utility model the reducible sound granule of inhaling of technical scheme blocks up the condition of letting out the sound hole.

Description

Speaker module and electronic equipment

Technical Field

The utility model relates to an acoustic energy conversion technology field, in particular to speaker module and electronic equipment who uses this speaker module.

Background

Generally, a speaker module includes a housing and a speaker unit accommodated in the housing, and the speaker unit divides an inner cavity of the housing into a front acoustic cavity and a rear acoustic cavity. In order to reduce the low frequency of the module and expand the bandwidth, sound-absorbing particles are filled in the rear sound cavity; and in order to balance the air pressure inside and outside the module, a sound leakage hole communicated with the rear sound cavity is formed in the shell. However, when the gas in the back sound intracavity was discharged through letting out the sound hole, can order about to inhale the sound granule and gush to letting out the sound hole department, lead to easily inhaling the sound granule jamming and block up the sound hole, lead to letting out sound hole department air current unusual, and then arouse the bad problem of module tone quality.

Disclosure of Invention

The utility model aims at providing a speaker module and applied this speaker module's electronic equipment aims at reducing the condition that inhales the blocking of sound granule and let out the sound hole.

In order to achieve the above object, an embodiment of the present invention provides a speaker module, which includes:

the method comprises the following steps:

a housing;

the loudspeaker single body is arranged in the inner cavity of the shell and divides the inner cavity of the shell into a front sound cavity and a rear sound cavity, sound absorption particles are filled in the rear sound cavity, the rear sound cavity is provided with a first cavity wall and a second cavity wall which are oppositely arranged, and the first cavity wall is provided with a sound leakage hole; and

the separation cylinder, the separation cylinder is located in the back sound cavity, and protruding locating the second chamber wall, deviating from of separation cylinder the one end orientation on second chamber wall let out the sound hole setting, be used for with inhale the sound granule with let out the sound hole and keep apart.

The utility model discloses an in the embodiment, the back of separation cylinder is in the terminal surface of second chamber wall is in projection area on the first chamber wall contains let out the sound hole place region, the back of separation cylinder is in the terminal surface of second chamber wall with the interval on the first chamber wall is less than inhale the size of sound granule.

In an embodiment of the present invention, the blocking cylinder faces away from the end surface of the second cavity wall, and a concave cavity is formed in the end surface of the blocking cylinder, and the opening of the concave cavity and the sound release hole are arranged relatively.

In an embodiment of the present invention, a coverage area of the opening of the cavity projected on the first cavity wall includes an area where the sound leakage hole is located.

The utility model discloses an in the embodiment, the back of separation cylinder is to the intercommunication has still been seted up to the terminal surface of second cavity wall the cavity with the guiding gutter in separation cylinder outside space, the minimum width of guiding gutter is less than inhale the size of sound granule.

The utility model discloses an in the embodiment, the guiding gutter is equipped with a plurality ofly, and is a plurality of the guiding gutter is followed the circumference interval of separation cylinder sets up.

The utility model discloses an in the embodiment, the guiding gutter with the one end orientation of separation cylinder outside space intercommunication the outside of separation cylinder is the flaring setting.

In an embodiment of the present invention, the diversion trench and the one end orientation that the cavity communicates the cavity is the flaring setting.

In an embodiment of the present invention, the blocking cylinder and the housing are integrally formed.

An embodiment of the utility model also provides an electronic equipment, this electronic equipment includes the speaker module, and this speaker module includes:

a housing;

The technical scheme of the utility model, owing to be provided with the separation cylinder that is used for inhaling the sound granule and let out the sound hole isolation in letting out the sound hole department, when the gas of the intracavity flow of back sound to letting out the sound hole ordered about and inhale the sound granule and gush to let out the sound hole department when, the separation cylinder just can produce the separation effect to the sound granule, will inhale the sound granule and let out the sound hole isolation to avoid inhaling the sound granule and gushing to let out the sound hole department, and then reduce and inhale the condition that the sound granule blockked up the sound hole. And when the condition that the sound absorbing particles block the sound leakage holes is improved, the abnormal condition that the gas flow velocity is instantaneously increased at the sound leakage holes is also improved, so that the condition that the sound absorbing particles violently move and collide with each other to cause noise is improved, the condition that the Reynolds number flowing in the sound leakage holes is increased to cause broadband pneumatic turbulence noise is improved, noise is finally reduced, and the module tone quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a speaker module according to the present invention;

fig. 2 is an exploded view of the speaker module of fig. 1;

FIG. 3 is a schematic view of the top shell of FIG. 2 from another perspective;

FIG. 4 is an enlarged view taken at IV in FIG. 3;

FIG. 5 is a schematic view of the lower shell of FIG. 2 from another perspective;

FIG. 6 is an enlarged view taken at VI in FIG. 5;

FIG. 7 is a cross-sectional view of the speaker module of FIG. 1 taken along line A-A;

fig. 8 is an enlarged view at viii in fig. 7.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Loudspeaker module	13a	Sound release hole
10	Outer casing	131	First chamber wall
				10a	Front acoustic cavity	30	Loudspeaker monomer
10b	Rear acoustic cavity	50	Barrier cylinder
				11	Upper casing	50a	Concave cavity
11a	Filling hole		50b					Diversion trench
				111	Second chamber wall	70	Cover plate
13	Lower casing

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

To the technical problem, the utility model provides a speaker module aims at reducing the condition that inhales the sound granule and block up the hole of letting out sound. The loudspeaker module can be applied to electronic equipment such as mobile phones, notebook computers, tablet computers, wearable equipment and intelligent sound boxes.

The following will explain the specific structure of the speaker module according to the present invention in the specific embodiment:

as shown in fig. 1 to 4, in an embodiment of the speaker module 100 of the present invention, the speaker module 100 includes a housing 10, a speaker unit 30 and a separation column 50.

Further, referring to fig. 5 to 8, the speaker unit 30 is disposed in the inner cavity of the housing 10, and separates the inner cavity of the housing 10 into a front sound cavity 10a and a rear sound cavity 10b, the rear sound cavity 10b is filled with sound absorbing particles (not shown), the rear sound cavity 10b has a first cavity wall 131 and a second cavity wall 111 which are disposed opposite to each other, and the first cavity wall 131 is provided with a sound leakage hole 13 a; and

the separation cylinder 50 is located in the back sound chamber 10b, and the protruding locating second chamber wall 111, the separation cylinder 50 deviate from the one end orientation of second chamber wall 111 let out the setting of sound hole 13a, be used for with inhale the sound granule with let out sound hole 13a and keep apart.

In this embodiment, the housing 10 includes an upper shell 11 and a lower shell 13 that are spliced together, and the upper shell 11 and the lower shell 13 together enclose an inner cavity of the housing 10. A sound discharge hole 13a is provided on the lower case 13, the sound discharge hole 13a penetrating the lower case 13 to communicate the rear sound chamber 10b with the external space of the housing 10; correspondingly, the blocking cylinder 50 is provided on the upper case 11. Of course, it is understood that in other embodiments, the sound leakage hole 13a may be provided on the upper case 11; correspondingly, the blocking cylinder 50 is provided on the lower shell 13.

The sound-absorbing particles may take a variety of shapes, for example: (1) the sound-absorbing particles can be spherical; at this time, the size of the sound-absorbing particles is the diameter of the spherical particles; (2) the sound-absorbing particles can also be in a square shape; at this time, the size of the sound-absorbing particles is the side length of the cube-shaped particles; (3) the sound-absorbing particles can also be cuboid; at this time, the size of the sound absorbing particles is the minimum value among the length, width and height of the rectangular parallelepiped particles. Further, in order to prevent the sound absorbing particles from falling into the sound leakage holes 13a, the diameter of the sound leakage holes 13a may be made smaller than the size of the sound absorbing particles. Of course, the diameter of the sound leakage holes 13a may be larger than or equal to the size of the sound-absorbing particles.

The blocking cylinder 50 may be a prism, a cylinder, a prism table or a circular truncated cone. There are various ways of isolating the sound-absorbing particles from the sound discharging holes 13a by the barrier cylinder 50, for example: (1) the blocking cylinder 50 is a cylinder, the diameter of the free end surface of the cylinder (i.e. the end surface of the blocking cylinder 50 facing away from the second cavity wall 111) is smaller than the diameter of the sound discharging hole 13a, the free end surface of the cylinder is arranged opposite to and coaxial with the inlet of the sound discharging hole 13a (i.e. the opening of the sound discharging hole 13a on the first cavity wall 131), an isolation gap is formed between the outer edge of the free end surface of the cylinder and the outer edge of the inlet of the sound discharging hole 13a, and the width of the isolation gap is smaller than the size of the sound absorbing particles; (2) the separation cylinder 50 is a cylinder, the diameter of the free end face of the cylinder (i.e. the end face of the separation cylinder 50 facing away from the second cavity wall 111) is smaller than the diameter of the sound leakage hole 13a, the cylinder and the sound leakage hole 13a are coaxially arranged, the free end of the cylinder extends into the sound leakage hole 13a, an isolation gap is formed between the outer side wall of the cylinder and the hole wall of the sound leakage hole 13a, and the width of the isolation gap is smaller than the size of the sound absorption particles. Of course, it is understood that the width of the aforementioned separation gap may actually be set to be slightly smaller than the size of the sound-absorbing particles; in this case, the sound absorbing particles can be isolated, the width is sufficient, the flow velocity at the sound discharging hole 13a is not too high, the broadband aerodynamic turbulence noise is not generated due to the too high flow velocity, and the poor sound quality is not increased.

The speaker unit 30 includes a vibration system (not shown) and a magnetic circuit system (not shown), the vibration system includes a diaphragm and a voice coil fixed on one side of the diaphragm, the diaphragm includes a central portion, a corrugated portion surrounding the central portion, and a fixing portion surrounding the corrugated portion, and the diaphragm may further include a composite layer combined with the central portion. The magnetic circuit system comprises a magnetic conducting yoke, wherein an inner magnetic circuit part and an outer magnetic circuit part are arranged on the magnetic conducting yoke, and a magnetic gap for accommodating the voice coil is formed between the inner magnetic circuit part and the outer magnetic circuit part. In one case, the inner magnetic path portion includes a central magnet disposed at a central position of the yoke and a central magnetic conductive plate disposed on the central magnet, and the outer magnetic path portion includes an edge magnet disposed at an edge position of the yoke and an edge magnetic conductive plate disposed on the edge magnet. The speaker unit 30 may further include an auxiliary system including a housing for housing the vibration system and the magnetic circuit system. In addition, the auxiliary system may further include a front cover coupled above the housing, the front cover and the housing enclosing an outer protective frame of the speaker unit 30. Of course, in some cases, the speaker unit 30 may not include an auxiliary system.

It can be understood that, according to the technical solution of the present embodiment, since the blocking cylinder 50 for isolating the sound absorbing particles from the sound outlet 13a is disposed at the sound outlet 13a, when the gas flowing to the sound outlet 13a in the rear sound cavity 10b drives the sound absorbing particles to flow to the sound outlet 13a, the blocking cylinder 50 can generate a blocking effect on the sound absorbing particles, so as to isolate the sound absorbing particles from the sound outlet 13a, thereby preventing the sound absorbing particles from flowing to the sound outlet 13a, and further reducing the situation that the sound absorbing particles block the sound outlet 13 a. Moreover, when the condition that the sound absorbing particles block the sound leakage holes 13a is improved, the abnormal condition that the gas flow velocity is instantaneously increased at the sound leakage holes 13a is also improved, so that the condition that the sound absorbing particles violently move and collide with each other to cause noise is improved, the condition that the Reynolds number flowing in the sound leakage holes 13a is increased to cause broadband aerodynamic turbulence noise is improved, finally, noise is reduced, and the module tone quality is improved.

In addition, in the present embodiment, the upper shell 11 is provided with a filling hole 11a communicating with the rear acoustic chamber 10b, and a cover plate 70 for covering the filling hole 11 a. Specifically, after the upper shell 11 and the lower shell 13 are assembled, the sound-absorbing particles can be poured into the rear sound cavity 10b from the filling hole 11a, thereby ensuring that the whole rear sound cavity 10b is filled with the sound-absorbing particles; in addition, the cover plate 70 covers the filling hole 11a, so that the sound-absorbing particles are prevented from leaking out. Wherein, apron 70 and epitheca 11 are for dismantling the connection to conveniently open apron 70 and change the sound absorption granule.

As shown in fig. 8, in an embodiment of the speaker module 100 of the present invention, the projection area of the end surface of the blocking cylinder 50 facing away from the second cavity wall 111 on the first cavity wall 131 includes the area where the sound leakage hole 13a is located, and the distance between the end surface of the blocking cylinder 50 facing away from the second cavity wall 111 and the first cavity wall 131 is smaller than the size of the sound absorption particles.

Specifically, the end surface of the blocking cylinder 50 facing away from the second chamber wall 111 is disposed opposite to the inlet of the sound vent 13a, and the outer edge of the projection area of the end surface of the blocking cylinder 50 facing away from the second chamber wall 111 on the first chamber wall 131 surrounds the periphery of the area where the sound vent 13a is located. That is, the projection area of the end surface of the blocking cylinder 50 facing away from the second chamber wall 111 on the first chamber wall 131 includes the area of the first chamber wall 131 at the periphery of the area where the sound vent 13a is located, in addition to the area where the sound vent 13a is located.

In this case, the outer edge of the end surface of the blocking cylinder 50 facing away from the second cavity wall 111 may cover more area. Therefore, the distance from the sound absorption particles to the sound leakage holes 13a can be increased, and the blocking effect of the blocking column 50 on the sound absorption particles is enhanced, so that the probability that the sound absorption particles surge to the sound leakage holes 13a is further reduced, and the condition that the sound absorption particles block the sound leakage holes 13a is reduced; and can also bring a section of comparatively smooth buffering runner for the air current to make gas can obtain the buffering between the terminal surface that keeps away from second cavity wall 111 of separation cylinder 50 and first cavity wall 131, and can flow into sound leakage hole 13a from the circumference of sound leakage hole 13a in with comparatively gentle velocity of flow, and then be favorable to reducing the reynolds number that flows, noise reduction.

As shown in fig. 4 and fig. 8, in an embodiment of the speaker module 100 of the present invention, a cavity 50a is disposed on an end surface of the blocking cylinder 50 facing away from the second cavity wall 111, and an opening of the cavity 50a is disposed opposite to the sound leakage hole 13 a.

Thus, a relatively wide space is formed in front of the inlet of the sound discharge hole 13 a; at this time, the gas flowing from the relatively flat buffer flow passage to the buffer flow passage can be further buffered, so that the gas can flow into the sound leakage hole 13a at a more gradual flow speed, and further the flowing reynolds number can be reduced, and the noise can be reduced. In addition, the hollow design of separation cylinder 50 still is favorable to the forming process of separation cylinder 50, avoids the shrink problem of solid separation cylinder 50 in the forming process, avoids producing the deviation after the structure shaping to promote the reliability of separation cylinder 50.

In order to further improve the cushioning effect of the open space, the covering area of the opening of the cavity 50a projected on the first cavity wall 131 includes the area of the sound outlet 13 a. That is, the outer edge of the covered area of the opening of the cavity 50a projected on the first cavity wall 131 wraps around the periphery of the area where the sound leakage hole 13a is located. That is, the covering area of the opening of the cavity 50a projected on the first cavity wall 131 includes a part of the area of the first cavity wall 131 at the periphery of the area where the sound leakage hole 13a is located, in addition to the area where the sound leakage hole 13a is located.

As shown in fig. 4 and 8, in an embodiment of the speaker module 100 of the present invention, the end surface of the separation column 50 facing away from the second cavity wall 111 is further provided with a diversion trench 50b communicating the cavity 50a with the space outside the separation column 50, and the minimum width of the diversion trench 50b is smaller than the size of the sound-absorbing particles. At this time, the gas outside the blocking cylinder 50 may flow to the sound discharging hole 13a not only through the flow channel between the end surface of the blocking cylinder 50 facing away from the second chamber wall 111 and the first chamber wall 131, but also through the flow guide groove 50b to the sound discharging hole 13 a. Therefore, the flow path of the gas outside the blocking cylinder 50 to the sound vent 13a is increased, the flow area is increased, and the gas in the rear sound cavity 10b flows more smoothly, so that the gas flows into the sound vent 13a at a smoother flow speed, the reynolds number of the flow is reduced, and the noise is reduced.

In order to further increase the flow path of the gas outside the baffle cylinder 50 to the sound outlet hole 13a and increase the flow area, the guide grooves 50b are provided in plural, and the guide grooves 50b are provided at intervals in the circumferential direction of the baffle cylinder 50. Simultaneously, the design that a plurality of guiding gutters 50b set up along the circumference interval of separation cylinder 50 can also make separation cylinder 50 deviate from second chamber wall 111 one end circumference everywhere air current state more stable to can avoid causing great disturbance to inhaling the sound granule, reduce the collision between the sound granule, noise reduction.

Further, one end of the diversion trench 50b, which is communicated with the space outside the blocking column 50, is flared towards the outside of the blocking column 50. Thus, the air outside the column 50 can be blocked from entering the diversion trench 50b, so that the air in the rear acoustic cavity 10b can flow more smoothly.

Further, one end of the guide groove 50b communicating with the cavity 50a is flared toward the cavity 50 a. Thus, the flow velocity of the gas entering the cavity 50a can be advantageously reduced, and the flow velocity of the gas flowing into the sound leakage hole 13a can be advantageously reduced, so that the reynolds number of the flow can be advantageously reduced, and the noise can be advantageously reduced.

It is understood that the connection between the blocking cylinder 50 and the housing 10 can be varied, for example, in an embodiment of the speaker module 100, the blocking cylinder 50 is integrally formed with the housing 10. Specifically, separation cylinder 50 and shell 10 integrated injection moulding, can form separation cylinder 50 together when shaping shell 10 promptly to reduce additionally to install the step on shell 10 with separation cylinder 50, not only can improve production efficiency, separation cylinder 50 is more stable with being connected of shell 10 moreover, and life is longer. Of course, in other embodiments, the blocking cylinder 50 and the housing 10 may be connected by gluing, heat melting, snapping, welding, etc. Those skilled in the art can make reasonable selection according to actual situations, and details are not repeated herein.

The utility model discloses still provide an electronic equipment, this electronic equipment include as before speaker module 100, this speaker module 100's concrete structure refers to aforementioned embodiment. Since the electronic device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by all the technical solutions of all the embodiments are achieved, and no further description is given here.

Wherein, electronic equipment still includes the equipment body, and speaker module 100 installs on the equipment body to switch on with the main control electricity of equipment body, so that electronic equipment can be through speaker module 100 sound production.

It is understood that the electronic device may be a mobile phone, a notebook computer, a tablet computer, a wearable device, a smart speaker, etc.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A speaker module, comprising:

a housing;

2. The speaker module as claimed in claim 1, wherein the projection area of the end of the blocking cylinder facing away from the second chamber wall on the first chamber wall includes the area of the sound leakage hole, and the distance between the end of the blocking cylinder facing away from the second chamber wall and the first chamber wall is smaller than the size of the sound-absorbing particles.

3. The speaker module as claimed in claim 2, wherein the end surface of the blocking pillar facing away from the second chamber wall is provided with a concave cavity, and the opening of the concave cavity is opposite to the sound leakage hole.

4. A loudspeaker module as claimed in claim 3, wherein the area of coverage of the opening of said cavity projected onto said first chamber wall comprises the area of said vent.

5. The speaker module as claimed in claim 3, wherein the end surface of the blocking pillar facing away from the second cavity wall further defines a guiding groove communicating the cavity and the space outside the blocking pillar, and the minimum width of the guiding groove is smaller than the size of the sound-absorbing particles.

6. The speaker module as claimed in claim 5, wherein the guiding grooves are provided in a plurality, and the guiding grooves are spaced along the circumference of the blocking cylinder.

7. The speaker module as claimed in claim 5, wherein an end of the guiding gutter communicating with the space outside the blocking cylinder is flared toward the outside of the blocking cylinder.

8. The speaker module as claimed in claim 5, wherein an end of the baffle slot communicating with the cavity is flared toward the cavity.

9. The speaker module of any one of claims 1-8, wherein the baffle cylinder is integrally formed with the housing.

10. An electronic device comprising the speaker module according to any one of claims 1 to 9.