WO2020103303A1 - Loudspeaker module - Google Patents

Abstract

Disclosed is a loudspeaker module. The loudspeaker module comprises: a housing that is provided with an accommodating cavity; a loudspeaker unit that is provided in the accommodating cavity and divides the accommodating cavity into a front acoustic cavity and a rear acoustic cavity, wherein the housing is provided with a sound outlet hole, and the front acoustic cavity is in communication with the sound outlet hole; an isolation frame that divides the rear acoustic cavity into a first rear cavity and a second rear cavity, wherein the loudspeaker unit is located at the first rear cavity, the second rear cavity is filled with sound absorbing particles, the isolation frame is provided with two side edges provided opposite to each other, each side edge is connected with a connection wall, a limiting wall is provided on the connection wall, the limiting wall and the isolation frame are provided at an interval so as to form a limiting groove, and the openings of the limiting grooves on the two side edges are opposite; and an isolation net, wherein the two opposite sides of the isolation net are clamped in the two limiting grooves in a one-to-one correspondence mode. The technical solution of the present invention can facilitate fixing the isolation net and the isolation frame, and avoid increasing the production costs.

Description

Speaker module Technical field

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

Background technique

As an energy conversion device, the speaker module belongs to an important acoustic component of electronic equipment and is used to complete the conversion between electrical signals and sound signals. Generally, the speaker module includes an outer shell, and a speaker monomer is contained in the outer shell. The speaker monomer separates the entire cavity of the module into a front acoustic cavity and a rear acoustic cavity. In order to reduce the low frequency of the module and expand the bandwidth, the rear sound cavity will be filled with sound absorbing particles, and in order to prevent the sound absorbing particles from entering the speaker monomer, an isolation component is provided in the rear sound cavity to isolate the sound absorbing particles from the speaker monomer. Generally, the isolation component includes an isolation frame and an isolation net. The isolation net and the isolation frame are integrally injection-molded. In order to avoid clogging the mesh of the isolation net, the process of injection molding the isolation net as an insert with the isolation frame is complicated, resulting in Mold cost is higher.

Summary of the invention

The main purpose of the present invention is to propose a speaker module, which aims to facilitate the fixing between the isolation net and the isolation frame and avoid the increase in production costs.

To achieve the above objective, the speaker module proposed by the present invention includes:

The shell has a receiving cavity;

A speaker unit is provided in the accommodating cavity, and the accommodating cavity is partitioned into a front acoustic cavity and a rear acoustic cavity, a sound output hole is provided on the housing, and the front sound cavity communicates with the sound output hole;

An isolation frame, the rear acoustic cavity is divided into a first rear cavity and a second rear cavity, the speaker monomer is located in the first rear cavity, the second rear cavity is filled with sound absorbing particles, and the isolation frame has On opposite sides of the two sides, each side edge is provided with a connecting wall, a limiting wall is provided on the connecting wall, the limiting wall is spaced apart from the isolation frame to form a limiting groove, two The openings of the limiting grooves on the side edges face each other; and

In the isolation net, two opposite sides of the isolation net are respectively held in the two limiting slots.

Optionally, the limiting wall and the connecting wall both extend from one end of the side edge to the opposite end.

Optionally, the connecting wall includes a plurality of connecting bars, and the plurality of connecting bars are arranged at intervals along the extending direction of the side edge, and the limiting wall includes a plurality of limiting bars, each of the connecting bars Each of them is provided with a limit bar.

Optionally, the end of the limiting wall away from the connecting wall is flush with the inner frame wall of the isolation frame.

Optionally, the isolation frame is a metal piece, and the connecting wall and the limiting wall are formed by integrally bending the isolation frame.

Optionally, a slot is provided on the inner wall of the housing, and the isolation frame is inserted and fixed in the slot.

Optionally, the outer shell includes an upper shell and a lower shell, the upper shell and the lower shell are enclosed to form the receiving cavity, and the speaker unit and the upper shell together form the front acoustic cavity. The loudspeaker unit, the lower shell and the upper shell together form the rear acoustic cavity;

The slot includes a first slot provided on the upper case, and the isolation frame is inserted into the first slot.

Optionally, the upper shell includes a bottom wall and a peripheral wall, the bottom wall is disposed opposite to the lower shell, the peripheral wall surrounds the peripheral edge of the bottom wall, and the lower housing cover is disposed on the peripheral wall The end away from the bottom wall,

The first slot includes a portion located on the bottom wall;

And / or, the first slot includes portions located on two opposite wall surfaces of the peripheral wall.

Optionally, the slot further includes a second slot on the lower case, and the isolation component is inserted into the first slot and the second slot.

Optionally, the lower case is provided with a filling hole, the filling hole communicates with the second rear cavity, the speaker module further includes a cover plate, and the cover plate covers the filling hole , And the cover plate is detachably connected to the lower shell.

In the present invention, the rear acoustic cavity of the speaker module is separated into a first rear cavity and a second rear cavity by providing an isolation frame and an isolation net, the sound absorbing particles are directly filled into the second rear cavity, and the sound absorbing particles do not need to be individually encapsulated Therefore, it can be ensured that the sound-absorbing particles are filled in all corners of the second rear cavity, which can greatly increase the number of sound-absorbing particles and enhance the sound-absorbing effect. Moreover, the second back cavity is isolated from the first back cavity by the isolation frame and the isolation net, the isolation frame and the isolation net block the sound absorbing particles in the second back cavity, which can prevent the sound absorbing particles from entering the first back cavity and then entering the speaker monomer . In addition, because the isolation net is held by the limit slot on the isolation frame, the card connection method is simple to install, and only need to insert the isolation net into the limit slot on the isolation frame, which is convenient for replacing the isolation net, compared with As a method of injection molding of the isolation net and the isolation frame as an insert, it is not affected by the injection material, so it can avoid the mesh clogging of the isolation net; furthermore, the processing method of the limiting groove is simple, so the production cost can be avoided Rise.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained according to the structures shown in these drawings.

1 is a schematic structural diagram of an embodiment of a speaker module of the present invention;

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

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

4 is an exploded schematic view of the isolation component in FIG. 3;

5 is a schematic structural view of the upper shell in FIG. 3;

FIG. 6 is a schematic structural view of the lower shell in FIG. 3.

Description of Drawing Symbols:

Label	name	Label		name
10	shell	131	Anterior acoustic cavity
11	Upper shell	132	Rear acoustic cavity
111	Clamping wall	1321	First back cavity
112	First slot	1322	Second back cavity
113	Sound hole	20	Speaker unit
114	Bottom wall	30	Isolated components
115	Zhou Bi	31	Isolation box
12	Lower shell	311	Breathable window

121	Cover	312	Connecting wall
122	Filling hole	313	Limit wall
123	Second slot	314	Limit slot
13	Containment cavity	32	Isolation net

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

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indicator (such as up, down, left, right, front, back, etc.) in the embodiment of the present invention, the directional indicator is only used to explain a specific posture (as shown in the drawings) The relative positional relationship, movements, etc. of the components below, if the specific posture changes, then the directional indication changes accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are for descriptive purposes only, and cannot be understood as instructions or hints Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined with "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to realize. When the combination of technical solutions contradicts or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the protection scope claimed by the present invention.

The present invention proposes a speaker module, which can be used in devices capable of producing sound, such as headphones and mobile phones.

Please refer to FIG. 1 to FIG. 3 together, the speaker module includes a housing 10 and a speaker unit 20, a housing cavity 13 is formed in the housing 10, and the housing 10 is provided with a sound hole 113 communicating with the housing cavity 13, the speaker unit 20 It is provided in the accommodating cavity 13, and the accommodating cavity 13 is partitioned into a front acoustic cavity 131 and a rear acoustic cavity 132, and a sound outlet 113 is provided in the front acoustic 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 to one side of the diaphragm. The diaphragm includes a central portion, a folded ring portion disposed around the central portion, and a folded The fixing portion provided in the ring portion and the diaphragm may further include a composite layer bonded to the central portion. The magnetic circuit system includes a magnetic yoke, and the magnetic yoke is provided with an inner magnetic circuit part and an outer magnetic circuit part, and a magnetic gap containing a voice coil is formed between the two. In one case, the inner magnetic circuit part includes a central magnet provided at the center of the magnetic yoke and a central magnetic plate provided on the central magnet, and the outer magnetic circuit part includes an edge provided at the edge of the magnetic yoke The magnet and the side magnetic guide plate provided on the side magnet. The speaker unit 20 may further include an auxiliary system, and the auxiliary system includes a housing, which is used to house a fixed vibration system and a magnetic circuit system. In addition, the auxiliary system may further include a front cover, the front cover is combined with the housing, and the front cover and the housing surround the protective frame of the speaker unit 20. Of course, in some cases, the speaker unit 20 may not include the auxiliary system.

Further, the speaker module further includes an isolation component 30, the isolation component 30 is disposed in the rear acoustic cavity 132, and the rear acoustic cavity 132 is partitioned into a first rear cavity 1321 and a second rear cavity 1322, and the speaker unit 20 is located in the first rear cavity In 1321, the second back cavity 1322 is filled with sound absorbing particles, and the isolation component 30 encapsulates the sound absorbing particles in the second back cavity 1322, thereby preventing the sound absorbing particles from entering the first back cavity 1321. It is conceivable that since the first rear cavity 1321 and the second rear cavity 1322 are connected, a through hole is provided in the isolation assembly 30 to play a role of communication. In this embodiment, the sound-absorbing particles are a mixture of one or more of natural zeolite powder, white carbon black, activated carbon, etc. Of course, the sound-absorbing particles can also be made of other materials as long as they can provide a sound-absorbing effect.

Please refer to FIG. 4 in detail. Specifically, the isolation assembly 30 includes an isolation frame 31 which separates the rear acoustic cavity 132 into a first rear cavity 1321 and a second rear cavity 1322. The isolation frame 31 is provided in a frame shape, for example The partition frame 31 has a shape such as a frame or a round frame. The window formed by the partition frame 31 serves as a ventilation window 311. The ventilation window 311 provides air circulation between the first rear cavity 1321 and the second rear cavity 1322. The isolation frame 31 has opposite side edges, and each side edge is provided with a connecting wall 312 that extends along the direction of the opening of the ventilation window 311, and the connecting walls 312 on both side edges are convex in the same direction The connection wall 312 is provided with a limit wall 313. The limit walls 313 on both sides of the edge extend toward each other. The limit wall 313 is spaced from the isolation frame 31 to form a limit groove 314. The openings of the limiting slots 314 face each other.

Further, the isolation assembly 30 further includes an isolation net 32 that is superposed on the isolation frame 31, the isolation net 32 covers the ventilation window 311 of the isolation frame 31, the isolation net 32 is located between the two connecting walls 312, and the isolation net 32 The two opposite sides of the corresponding one are held in the two limiting slots 314 one by one. In this embodiment, the isolation frame 31 and the limiting wall 313 abut one another on two opposite sides of the isolation net 32, thereby clamping the isolation net 32 and avoiding the separation between the isolation net 32 and the isolation frame 31. In addition, the isolation net 32 is a metal mesh or mesh cloth, etc., the mesh of the isolation net 32 is smaller than the outer diameter of the sound absorbing particles, thereby preventing the sound absorbing particles from drilling into the first rear cavity 1321 from the mesh.

In the present invention, the rear sound cavity 132 of the speaker module is divided into a first rear cavity 1321 and a second rear cavity 1322 by providing an isolation frame 31 and an isolation net 32, the sound absorbing particles are directly filled into the second rear cavity 1322, The sound absorbing particles do not need to be individually encapsulated, so that the sound absorbing particles can be filled into all corners of the second rear cavity 1322, which can greatly increase the number of sound absorbing particles and enhance the sound absorbing effect. Moreover, the second rear cavity 1322 is isolated from the first rear cavity 1321 by the isolation frame 31 and the isolation net 32. The isolation frame 31 and the isolation net 32 block the sound absorbing particles in the second rear cavity 1322, which can prevent the sound absorbing particles from entering the first The rear cavity 1321 then enters the speaker unit 20. In addition, since the isolation net 32 is clamped in the limit slot 314 on the isolation frame 31, the clamping connection method is simple to install, and the isolation net 32 only needs to be snapped into the limitation slot 314 on the isolation frame 31, which is convenient Replacing the isolation net 32, compared with the injection molding of the isolation net 32 as an insert with the isolation frame 31, since it is not affected by the injection material, the mesh of the isolation net 32 can be prevented from being blocked; The processing method of the groove 314 is simple, so that the increase in production cost can be avoided.

In some embodiments, the limiting wall 313 and the connecting wall 312 are an entire elongated structure. Specifically, the limiting wall 313 and the connecting wall 312 are both arranged in a long shape, and extend from one end of the side edge to The opposite end is equivalent to connecting the connecting wall 312 and the limiting wall 313 on the entire side edge. The length of the limiting groove 314 thus formed is the largest, which can wrap the entire side of the isolation net 32 to achieve a more Good limit effect.

In some other embodiments, the limiting wall 313 and the connecting wall 312 are both broken-point structures. Specifically, the connecting wall 312 includes a plurality of connecting strips, and the plurality of connecting strips are arranged at intervals along the extending direction of the side edges. The wall 313 includes a plurality of limiting bars, and each connecting bar is provided with a limiting bar. For example, two connection bars may be provided on the same side edge of the isolation frame 31, and the two connection bars are respectively provided near both ends of the side edge. Of course, more connection bars may be provided on the same side edge of the isolation frame 31. For example, set three or five connection bars.

In order to reduce the obstruction of the ventilation window 311 on the isolation frame 31 and satisfy a sufficiently large ventilation area of the isolation assembly 30, in this embodiment, the end of the limiting wall 313 away from the connection wall 312 is flush with the inner frame wall of the isolation frame 31 That is, the end of the limiting wall 313 away from the connecting wall 312 is flush with the window edge of the ventilation window 311 of the partition frame 31, and the window edge refers to the window edge adjacent to the limiting wall 313 side. This arrangement can prevent the limit wall 313 from being too long to block the ventilation window 311, and also ensure that the length of the limit wall 313 is long, so that the contact area of the limit wall 313 to the isolation net 32 is large, which satisfies a better Clamping effect.

In this embodiment, the isolation frame 31 is a metal piece, and the connecting wall 312 and the limiting wall 313 are formed by integrally bending the isolation frame 31. The connecting wall 312 is a flange formed by folding the side edge of the isolation frame 31, and the limiting wall 313 is a flange formed by folding the connecting wall 312. The integrated bending method is adopted, the forming process is simple, and there is no need to remove waste materials, which can reduce the waste of materials. In addition, after the isolation frame 31 is bent integrally to form the limit slot 314, the isolation net 32 can be snapped into the limit slot 314; of course, the isolation net 32 and the isolation frame 31 can be superimposed and set first. The isolation frame 31 is bent so that the limiting wall 313 formed by the bending abuts on the isolation net 32. In other embodiments, the isolation frame 31 may also be an injection molded part, and the connecting wall 312, the limiting wall 313 and the isolation frame 31 are integrally formed by injection molding.

In this embodiment, a slot is provided on the inner wall of the housing 10, and the isolation frame 31 is inserted and fixed in the slot. By providing a slot for the isolation frame 31 to be plugged in, it can play a limiting role on the isolation frame 31, avoid the displacement of the isolation frame 31, and can play a better isolation effect. Specifically, the housing 10 includes an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 are enclosed to form a receiving cavity 13, the speaker unit 20 and the upper housing 11 together form a front sound cavity 131, the speaker unit 20, the lower The casing 12 and the upper casing 11 are enclosed together to form a rear acoustic cavity 132. Optionally, the speaker unit 20 and the upper shell 11 are fixed by adhesion. Please refer to FIGS. 5 and 6 together. In order to fix the isolation frame 31 to the upper case 11 and the lower case 12, the slot includes a first slot 112 provided on the upper case 11, and the isolation component 30 is inserted into the first slot The groove 112 restricts the movement of the isolation frame 31 on the upper shell 11 to ensure that the isolation frame 31 and the upper shell 11 are accurately positioned.

In the present invention, a first slot 112 is provided on the upper case 11, a second slot 123 is provided on the lower case 12, and the isolation frame 31 is respectively inserted into the first slot 112 and the second slot 123. By providing the first slot 112 and the second slot 123 for the isolation frame 31 to be plugged in, it can play a limiting role on the isolation frame 31, avoid the displacement of the isolation frame 31, and can play a better isolation effect. Optionally, the isolation frame 31 and the first slot 112 are tightly fitted and inserted, and the isolation frame 31 and the second slot 123 are tightly fitted and inserted, thereby achieving better sealing and preventing sound absorbing particles from the isolation frame 31 and the housing 10 Through the connection gap.

In this embodiment, the lower shell 12 is provided in a plate shape, and the upper shell 11 is in the shape of a cavity open toward the lower shell 12 and includes a bottom wall 114 and a peripheral wall 115 connected to each other. The peripheral wall 115 surrounds the peripheral edge of the bottom wall 114 and extends in a ring shape along the peripheral edge of the bottom wall 114. The lower shell 12 covers the end of the peripheral wall 115 away from the bottom wall 114. Optionally, the first slot 112 includes a portion located on the bottom wall 114; and / or the first slot 112 includes portions located on two opposite wall surfaces of the peripheral wall 115. For example, in some embodiments, the first slot 112 includes a portion located on the bottom wall 114 and a portion located on two opposite wall surfaces of the peripheral wall 115, which is equivalent to having both the bottom wall 114 and the peripheral wall 115 The first slot 112 wraps all the sides of the isolation frame 31 exposed in the upper shell 11 to achieve a better sealing effect. In other embodiments, the first slot 112 includes a portion located on the bottom wall 114; in other embodiments, the first slot 112 includes portions located on two opposite walls of the peripheral wall 115.

Specifically, two clamping walls 111 are provided on the bottom wall 114 of the upper casing 11, and the two clamping walls 111 are opposed and spaced apart. The interval between the two clamping walls 111 forms a first slot 112, and the clamping wall 111 Both ends extend toward the lower shell 12 along the peripheral wall 115 and extend to the end surface of the peripheral wall 115. In addition, the first socket 112 may also be formed on the upper case 11 by removing surface materials. Similarly, the second slot 123 has a long shape, and wraps the side of the isolation frame 31 facing the lower case 12, so that the entire periphery of the isolation frame 31 is shared by the second slot 123 and the first slot 112 package.

In the above, the upper shell 11 and the lower shell 12 are bonded or welded, and the gap at the connection between the upper shell 11 and the lower shell 12 can be eliminated by means of bonding or welding to achieve a better sealing effect between the two. In addition, the upper shell 11 and the lower shell 12 can also be connected by a snap.

Further, the lower case 12 is provided with a filling hole 122, the filling hole 122 communicates with the second rear cavity 1322, the speaker module further includes a cover plate 121, and the cover plate 121 covers the filling hole 122. In this embodiment, after the upper shell 11 and the lower shell 12 are assembled, the sound-absorbing particles can be poured into the second rear cavity 1322 from the filling hole 122, which can ensure that the entire second rear cavity 1322 is filled with sound-absorbing particles; The cover 121 closes the filling hole 122 to avoid leakage of sound-absorbing particles. Optionally, the cover plate 121 is detachably connected to the lower case 12, so that it is convenient to open the cover plate 121 to replace the sound absorbing particles. Specifically, the holes of the cover plate 121 and the filling hole 122 can be provided with threads, so that the cover plate 121 and the lower shell 12 are screwed tightly; in addition, the cover plate 121 and the lower shell 12 can also be clamped or screwed Wait for the connection.

The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made by the description and drawings of the present invention under the inventive concept of the present invention, or directly / indirectly used in other Related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A speaker module, which is characterized by comprising:

   The shell has a receiving cavity;

   A speaker unit is provided in the accommodating cavity, and the accommodating cavity is partitioned into a front acoustic cavity and a rear acoustic cavity, a sound output hole is provided on the housing, and the front sound cavity communicates with the sound output hole;

   An isolation frame, the rear acoustic cavity is divided into a first rear cavity and a second rear cavity, the speaker monomer is located in the first rear cavity, the second rear cavity is filled with sound absorbing particles, and the isolation frame has On opposite sides of the two sides, each side edge is provided with a connecting wall, a limiting wall is provided on the connecting wall, the limiting wall is spaced apart from the isolation frame to form a limiting groove, two The openings of the limiting grooves on the side edges face each other; and

   In the isolation net, two opposite sides of the isolation net are respectively held in the two limiting slots.
2. The speaker module according to claim 1, wherein the limiting wall and the connecting wall both extend from one end of the side edge to the opposite end.
3. The speaker module according to claim 1, wherein the connecting wall includes a plurality of connecting bars, the plurality of connecting bars are arranged at intervals along the extending direction of the side edge, and the limiting wall includes a plurality of A limiting bar, each of the connecting bars is provided with the limiting bar.
4. The speaker module according to claim 1, wherein an end of the limiting wall away from the connecting wall is flush with an inner frame wall of the isolation frame.
5. The speaker module according to claim 1, wherein the isolation frame is a metal piece, and the connecting wall and the limiting wall are formed by integrally bending the isolation frame.
6. The speaker module according to any one of claims 1 to 5, wherein a slot is provided on an inner wall of the housing, and the isolation frame is inserted and fixed in the slot.
7. The speaker module according to claim 6, characterized in that the outer shell comprises an upper shell and a lower shell, the upper shell and the lower shell are enclosed to form the receiving cavity, and the speaker unit and the The upper shell collectively forms the front acoustic cavity, and the speaker unit, the lower shell, and the upper shell collectively form the rear acoustic cavity;

   The slot includes a first slot provided on the upper case, and the isolation frame is inserted into the first slot.
8. The speaker module according to claim 7, wherein the upper case includes a bottom wall and a peripheral wall, the bottom wall is disposed opposite to the lower case, and the peripheral wall surrounds the peripheral edge of the bottom wall, The lower shell cover is provided at an end of the peripheral wall away from the bottom wall,

   The first slot includes a portion located on the bottom wall;

   And / or, the first slot includes portions located on two opposite wall surfaces of the peripheral wall.
9. The speaker module according to claim 8, wherein the slot further comprises a second slot on the lower case, and the isolation component is inserted into the first slot and the first slot In the second slot.
10. The speaker module according to claim 7, wherein the lower case is provided with a filling hole, the filling hole communicates with the second rear cavity, and the speaker module further includes a cover plate, The cover plate covers the filling hole, and the cover plate is detachably connected to the lower case.

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