CN109246563B

CN109246563B - Loudspeaker module

Info

Publication number: CN109246563B
Application number: CN201811413493.6A
Authority: CN
Inventors: 谭飞; 陈国强; 冯新涛
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2020-11-03
Anticipated expiration: 2038-11-23
Also published as: WO2020103301A1; CN109246563A

Abstract

The invention discloses a loudspeaker module, which comprises: the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are enclosed to form an accommodating cavity, and the inner wall of the upper shell is provided with a slot; the loudspeaker single body is arranged in the accommodating cavity, the loudspeaker single body and the upper shell jointly enclose a front sound cavity, the loudspeaker single body, the lower shell and the upper shell jointly enclose a rear sound cavity, the shell is provided with a sound outlet, and the front sound cavity is communicated with the sound outlet; and the baffle is located back sound chamber, and will back sound chamber separates to establish to first back chamber and second back chamber, the baffle with the integrative injection moulding of inferior valve, just the baffle with the slot is pegged graft, the speaker monomer is located first back chamber, the second back chamber is filled there is the sound granule of inhaling. The technical scheme of the invention can fully utilize the space of the rear sound cavity to improve the acoustic performance of the module.

Description

Loudspeaker module

Technical Field

The invention relates to the technical field of sound energy conversion, in particular to a loudspeaker module.

Background

The loudspeaker module is used as an energy conversion device, belongs to an important acoustic component of electronic equipment and is used for completing conversion between an electric signal and a sound signal. Generally, the speaker module includes the shell, has accommodated the speaker monomer in the shell, and the speaker monomer is separated into two cavitys in preceding sound chamber and the back sound chamber with whole module inner chamber. In order to reduce the module low frequency, the extension bandwidth can fill in the back sound intracavity and inhale the sound granule, and in order to avoid inhaling the sound granule and get into the speaker monomer, is equipped with the baffle in the back sound intracavity, and the baffle will inhale the sound granule and keep apart with the speaker monomer.

Generally, be equipped with the grip wall on the internal surface of module shell, the baffle is held fixedly by the grip wall clamp, but for guaranteeing that the baffle is effectively fixed, the grip wall is generally great at the protruding height of surface in the shell, so lead to occupying too much to back sound intracavity space, consequently the sound granule of inhaling that only can fill less in the back sound intracavity to it is relatively poor to make the improvement effect of inhaling the sound granule to module acoustic performance.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker module, aiming at improving the acoustic performance of the module by fully utilizing the space of a rear sound cavity.

In order to achieve the above object, the present invention provides a speaker module, including:

the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are enclosed to form an accommodating cavity, and the inner wall of the upper shell is provided with a slot;

the loudspeaker single body is arranged in the accommodating cavity, the loudspeaker single body and the upper shell jointly enclose a front sound cavity, the loudspeaker single body, the lower shell and the upper shell jointly enclose a rear sound cavity, the shell is provided with a sound outlet, and the front sound cavity is communicated with the sound outlet; and

the baffle is located back sound chamber, and will back sound chamber separates to establish to first back chamber and second back chamber, the baffle with the integrative injection moulding of inferior valve, just the baffle with the slot is pegged graft, the speaker monomer is located first back chamber, the second back chamber is filled there is the sound granule of inhaling.

Optionally, the upper casing includes a bottom wall and a peripheral wall, the bottom wall is disposed opposite to the lower casing, the peripheral wall is disposed around a periphery of the bottom wall, the lower casing is disposed at an end of the peripheral wall away from the bottom wall, and the insertion slot includes portions located on two opposite wall surfaces of the peripheral wall.

Optionally, the slot further comprises a portion located on the bottom wall.

Optionally, be equipped with the filling hole on the inferior valve, the speaker module still includes the apron, the apron lid closes the filling hole, just the apron with the connection can be dismantled to the inferior valve.

Optionally, be equipped with the intercommunicating pore on the baffle, the speaker module still includes the screen cloth, the screen cloth with the baffle is fixed, and the lid closes the intercommunicating pore setting.

Optionally, the mesh cloth and the partition plate are integrally injection molded.

Optionally, a hot melting piece is arranged on the partition plate, and the mesh cloth and the partition plate are fixed through the hot melting piece in a hot melting mode.

Optionally, the mesh cloth is fixed to the partition plate by bonding.

Optionally, the mesh cloth is located on a side of the partition plate facing the first rear cavity.

Optionally, a plurality of the air-permeable meshes are arranged on the partition plate, so that the partition plate is arranged in a screen shape.

According to the loudspeaker module, the rear sound cavity of the loudspeaker module is divided into the first rear cavity and the second rear cavity by the partition plate, the sound absorption particles are directly filled in the second rear cavity, and the sound absorption particles are not required to be independently packaged, so that the sound absorption particles can be guaranteed to be filled in all corners of the second rear cavity, the number of the sound absorption particles can be greatly increased, and the sound absorption effect is enhanced. And, the second back cavity passes through the baffle and is isolated with first back cavity, and the baffle will inhale the sound granule and block at the second back cavity, can prevent to inhale the sound granule and get into first back cavity and then get into the speaker monomer. Meanwhile, the partition plate with the isolation function and the lower shell are integrally formed, and compared with the split arrangement of the partition plate and the lower shell, the integrated mode is formed in one step through a die, the subsequent assembly process is omitted, and the installation procedure of the loudspeaker module is simplified. To baffle and inferior valve components of a whole that can function independently setting up, for can fixed baffle in some examples, set up two grip walls and come the centre gripping baffle at the inferior valve internal surface, because the setting of grip wall leads to the back sound intracavity space to reduce, so reduced the filling space who inhales the sound granule, and this integrated into one piece's mode can reduce or even remove the setting of grip wall from, therefore can significantly reduce to the occupation of back sound intracavity space, the filling space of the sound granule is inhaled in the increase. Moreover, through setting up the mode that the slot supplied the baffle to peg graft, can play limiting displacement to the baffle, avoid the baffle to take place the skew, can play better isolation effect.

Drawings

In order to more clearly illustrate 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 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 a speaker module according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the speaker module shown in FIG. 1 taken along the line A-A;

FIG. 3 is an exploded view of the speaker module of FIG. 1;

FIG. 4 is a structural schematic view of the lower case of FIG. 3;

fig. 5 is a schematic structural view of the upper case of fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Outer casing	131	Front acoustic cavity
11	Upper casing	132	Rear acoustic cavity
				111	Clamping wall	1321	First rear cavity
112	Inserting groove	1322	Second rear cavity
				113	Sound outlet	20	Loudspeaker monomer
114	Bottom wall	30	Isolation component
				115	Peripheral wall	31	Partition board
12	Lower casing	311	Communicating hole
				121	Cover plate	312	Reinforcing rib
122	Filling hole	32	Net cloth
				13	Containing cavity

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating 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 addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a loudspeaker module which can be used for equipment capable of producing sound, such as earphones, mobile phones and the like.

Referring to fig. 1 to 3, the speaker module includes a housing 10 and a speaker unit 20, a receiving cavity 13 is formed in the housing 10, the housing 10 is provided with a sound outlet 113 communicated with the receiving cavity 13, the speaker unit 20 is disposed in the receiving cavity 13, the receiving cavity 13 is partitioned into a front sound cavity 131 and a rear sound cavity 132, and the sound outlet 113 is disposed in the front sound cavity 131. In this embodiment, the speaker unit 20 includes a vibration system and a magnetic circuit system, 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 20 may further include an auxiliary system including a housing for housing the fixed vibration system and the magnetic circuit system. In addition, the auxiliary system may further include a front cover coupled to an upper side of the housing, the front cover and the housing enclosing a protective frame of the speaker unit 20. Of course, in some cases, the speaker unit 20 may not include an auxiliary system.

Referring to fig. 4, the speaker module further includes a partition plate 31, the partition plate 31 partitions the rear acoustic cavity 132 into a first rear cavity 1321 and a second rear cavity 1322, and the partition plate 31 is integrally injection-molded with the housing 10. It is conceivable that a through hole is provided in the partition plate 31 to perform a communicating function since the first back chamber 1321 and the second back chamber 1322 are communicated. In this embodiment, the speaker unit 20 is located in the first rear cavity 1321, the second rear cavity 1322 is filled with sound-absorbing particles, and the partition plate 31 encapsulates the sound-absorbing particles in the second rear cavity 1322, so as to prevent the sound-absorbing particles from entering the first rear cavity 1321. In this embodiment, the sound-absorbing particles are a mixture of one or more of natural zeolite powder, white carbon black, activated carbon, and the like, and of course, the sound-absorbing particles may be made of other materials as long as the sound-absorbing effect is achieved.

In the invention, the rear sound cavity 132 of the loudspeaker module is divided into the first rear cavity 1321 and the second rear cavity 1322 by the partition plate 31, the sound absorption particles are directly filled in the second rear cavity 1322, and the sound absorption particles are not required to be independently packaged, so that the sound absorption particles can be ensured to be filled in each corner of the second rear cavity 1322, the number of the sound absorption particles can be greatly increased, and the sound absorption effect is enhanced. The second back cavity 1322 is isolated from the first back cavity 1321 by the partition plate 31, and the partition plate 31 blocks sound-absorbing particles in the second back cavity 1322, thereby preventing the sound-absorbing particles from entering the first back cavity 1321 and then entering the speaker unit 20. Meanwhile, as the partition plate 31 for isolation is integrally formed with the housing 10, compared with the split arrangement of the partition plate 31 and the housing 10, the integrated manner is formed by one step through a mold, so that the subsequent assembly process is omitted, and the installation procedure of the speaker module is simplified. For the partition plate 31 and the shell 10 being arranged separately, in some examples, in order to fix the partition plate 31, two clamping walls are arranged on the inner surface of the shell 10 to clamp the partition plate 31, and the space in the rear sound cavity 132 is reduced due to the arrangement of the clamping walls, so that the filling space of the sound-absorbing particles is reduced, and the arrangement of the clamping walls can be reduced or even eliminated by the integral forming mode, so that the occupation of the space of the rear sound cavity 132 can be greatly reduced, and the filling space of the sound-absorbing particles is increased.

Specifically, the housing 10 includes an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 enclose to form an accommodating cavity 13, the speaker unit 20 and the upper shell 11 enclose to form a front sound cavity 131, and the speaker unit 20, the lower shell 12 and the upper shell 11 enclose to form a rear sound cavity 132. Alternatively, the speaker unit 20 is fixed to the upper case 11 by adhesion. In this embodiment, the partition plate 31 and the lower shell 12 are integrally injection molded, and one end of the partition plate 31 far away from the lower shell 12 abuts against the upper shell 11, so as to separate the first rear cavity 1321 from the second rear cavity 1322. In this embodiment, because baffle 31 and inferior valve 12 integrated into one piece, there is not the installation clearance between baffle 31 and the inferior valve 12, uniformity between the two is better, when epitheca 11 and inferior valve 12 assemble, only need consider the baffle 31 and the epitheca 11 between the assembly can, owing to need not consider the baffle 31 and epitheca 11 and the baffle 31 and the assembly between the inferior valve 12 simultaneously, consequently the uniformity when assembling with epitheca 11 is better, do benefit to automatic assembly, the produced clearance of assembly still less, consequently, product quality guarantees more easily.

Referring to fig. 5, further, the upper shell 11 is provided with a slot 112, the slot 112 is located in the rear acoustic cavity 132, and the partition plate 31 is inserted into the slot 112. Through setting up the mode that slot 112 supplied baffle 31 to peg graft, can play limiting displacement to baffle 31, avoid baffle 31 to take place the skew, can play better isolation effect. Optionally, the partition 31 is tightly fitted into the insertion slot 112, so as to achieve better sealing and prevent sound-absorbing particles from passing through the connection gap between the partition 31 and the insertion slot 112. In this embodiment, the lower shell 12 is disposed in a plate shape, the upper shell 11 is in a cavity shape opened toward the lower shell 12, and includes a bottom wall 114 and a peripheral wall 115 connected to each other, the bottom wall 114 is disposed opposite to the lower shell 12, the peripheral wall 115 extends along a peripheral edge of the bottom wall 114 to form a ring shape, and the lower shell 12 is covered on an end of the peripheral wall 115 far from the bottom wall 114. Alternatively, the insertion groove 112 includes portions on two opposite wall surfaces of the peripheral wall 115, so that the partition plate 31 can slide along the insertion groove 112 on the peripheral wall 115 when the partition plate 31 is inserted toward the upper case 11, and the insertion groove 112 on the peripheral wall 115 can guide the insertion of the partition plate 31. Further, the insertion groove 112 further includes a portion located on the bottom wall 114, and the partition plate 31 is inserted into the insertion groove 112 on the bottom wall 114, so as to wrap all side edges of the partition plate 31 except for the side connected with the lower shell 12, thereby performing a better isolation function on the first back cavity 1321 and the second back cavity 1322, and achieving a better sealing effect. Specifically, two holding walls 111 are provided on the upper case 11, the two holding walls 111 are disposed opposite to each other at an interval, and the interval between the two holding walls 111 forms the slot 112. In addition, the insertion groove 112 may be formed on the upper case 11 by removing a surface material.

In the above, the upper shell 11 and the lower shell 12 are bonded or welded, and the bonding or welding mode can eliminate the gap at the joint of the upper shell 11 and the lower shell 12, thereby realizing better sealing effect of the two. In addition, the upper case 11 and the lower case 12 may be connected by a snap.

Further, a filling hole 122 is formed in the lower shell 12, the speaker module further includes a cover plate 121, and the filling hole 122 is covered by the cover plate 121. In this embodiment, after the upper shell 11 and the lower shell 12 are assembled, the sound-absorbing particles can be filled into the second back cavity 1322 from the filling hole 122, so that the whole second back cavity 1322 can be filled with the sound-absorbing particles; in addition, the cover plate 121 covers the filling hole 122, so that the leakage of sound absorption particles is avoided. Alternatively, the cover plate 121 is detachably coupled to the lower case 12, thereby facilitating the replacement of the sound-absorbing particles by opening the cover plate 121. Specifically, the cover plate 121 and the filling hole 122 may be provided with threads at the hole edges thereof, so that the cover plate 121 and the lower shell 12 are screwed together; in addition, the cover plate 121 and the lower case 12 may be connected by a snap or a screw, etc.

In some embodiments, the partition 31 is provided with a communication hole 311 so that the partition 31 is disposed in a frame shape, the speaker module further includes a mesh 32, the mesh 32 is fixed to the partition 31 and disposed to cover the communication hole 311, and the mesh 32 and the partition 31 together form a partition member 30 for partitioning the first back chamber 1321 and the second back chamber 1322. Because the screen cloth 32 is easily processed, and the mesh on it can be done lessly, consequently can play better effect of blockking to inhaling the sound granule, the air permeability of screen cloth 32 is better moreover, so can guarantee the smooth and easy circulation of air. The frame-like form of the partition plate 31 greatly reduces the blocking area of the partition plate 31, and ensures the circulation of air between the first back chamber 1321 and the second back chamber 1322. Further, the partition plate 31 is provided with ribs 312, and the ribs 312 are respectively connected to two opposite sides of the partition plate 31, and partition the communication hole 311 into two through holes. The reinforcing ribs 312 serve to reinforce the structure of the frame-shaped partition plate 31, and prevent the partition plate 31 from being deformed by the co-extrusion of the upper shell 11 and the lower shell 12.

In this embodiment, the mesh 32 and the partition 31 are fixed in various ways, for example, the mesh 32 and the partition 31 are integrally injection molded, and the mesh 32 is used as an insert and injection molded together with the partition 31; or, the partition board 31 is provided with a hot melting piece, and the mesh 32 and the partition board 31 are fixed through the hot melting piece; alternatively, the mesh 32 is fixed to the separator 31 by adhesion. In addition, the mesh 32 and the spacer 31 may be fixed by nails or the like.

Optionally, the mesh 32 is located on the side of the partition 31 facing the first back cavity 1321, so that the space inside the second back cavity 1322 can be prevented from being occupied by the mesh 32, and therefore, more sound-absorbing particles can be contained in the second back cavity 1322.

In other embodiments, the isolation member 30 may only include the partition plate 31, and the partition plate 31 is provided with a plurality of air permeable meshes, so that the partition plate 31 is in a mesh shape, thereby eliminating the mesh 32, and the partition plate 31 itself can block the sound-absorbing particles. The pore size of the air-permeable mesh is smaller than the outer diameter of the sound-absorbing particles to prevent the sound-absorbing particles from entering the first rear cavity 1321 through the air-permeable mesh.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A speaker module, comprising:

the loudspeaker single body is arranged in the accommodating cavity and is arranged on the upper shell, the loudspeaker single body and the upper shell jointly enclose a front sound cavity, the loudspeaker single body, the lower shell and the upper shell jointly enclose a rear sound cavity, the shell is provided with a sound outlet, and the front sound cavity is communicated with the sound outlet; and

the baffle is arranged in the rear sound cavity and divides the rear sound cavity into a first rear cavity and a second rear cavity, the baffle and the lower shell are integrally formed by injection molding, the baffle is inserted into the slot, the loudspeaker monomer is positioned in the first rear cavity, and the second rear cavity is filled with sound-absorbing particles;

wherein the partition plate is provided to protrude from the lower case in a direction toward the upper case.

2. The speaker module as claimed in claim 1, wherein the upper housing includes a bottom wall and a peripheral wall, the bottom wall is disposed opposite to the lower housing, the peripheral wall is disposed around a periphery of the bottom wall, the lower housing is disposed at an end of the peripheral wall away from the bottom wall, and the insertion slot includes portions on two opposite wall surfaces of the peripheral wall.

3. The speaker module of claim 2, wherein the slot further comprises a portion on the bottom wall.

4. The speaker module as claimed in claim 1, wherein the lower case has a filling hole, the speaker module further comprises a cover plate covering the filling hole, and the cover plate is detachably connected to the lower case.

5. The speaker module as claimed in any one of claims 1 to 4, wherein the partition board is provided with a communication hole, and the speaker module further comprises a mesh fixed to the partition board and covering the communication hole.

6. The speaker module as recited in claim 5, wherein said mesh is integrally injection molded with said baffle.

7. The speaker module as claimed in claim 5, wherein a thermal melting member is disposed on the partition, and the mesh and the partition are fixed by the thermal melting member.

8. The speaker module as recited in claim 5, wherein said mesh is adhesively secured to said baffle.

9. A loudspeaker module according to claim 5, wherein the mesh is located on a side of the baffle plate facing the first rear chamber.

10. A loudspeaker module as claimed in any one of claims 1 to 4, wherein the baffle is provided with a plurality of air permeable mesh openings to provide a mesh-like arrangement of the baffle.