CN213906848U

CN213906848U - Loudspeaker box

Info

Publication number: CN213906848U
Application number: CN202023100775.6U
Authority: CN
Inventors: 任璋; 钟志威; 宋威
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-06
Anticipated expiration: 2030-12-18
Also published as: WO2022126783A1

Abstract

The utility model provides a loudspeaker box, including the casing that has accommodating space and the sound production monomer that has the vibrating diaphragm, the sound production monomer accept in the casing, just the vibrating diaphragm will accommodating space separates for antechamber and back chamber, the casing still have with the vibrating diaphragm set up relatively and with the vibrating diaphragm encloses to close and forms the diapire of antechamber and encircleing the free barricade of sound production, the sound production monomer is equipped with and is used for being connected with the flexible circuit board that has the pad with the outside circuit electricity, loudspeaker box still includes the soldering lug, the soldering lug include with the second electricity connecting portion that the pad electricity is connected, the barricade is being close to one side of second electricity connecting portion is equipped with passageway portion, flexible circuit board still include certainly the kink that the sound production monomer stretches out, the kink passes passageway portion and with the pad is connected. Compared with the prior art, the loudspeaker box has the advantages that the channel part is arranged on the retaining wall, so that the volume of the rear cavity is increased, and the flexible circuit board is conveniently arranged.

Description

Loudspeaker box

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric field especially relates to an apply to speaker box of portable electronic product.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker box for playing sound is widely applied to the current smart mobile devices.

The loudspeaker box comprises a shell and a sounding single body contained in the shell, wherein the sounding single body is provided with a flexible circuit board electrically connected with an external circuit. In the related art, the flexible circuit board is provided with a pad, which passes through the pad and the external circuit electric connection, wherein, the casing includes around the free barricade of sound production, keeping away from of barricade the free one side of sound production is equipped with the boss, the pad of flexible circuit board is located the boss. However, the bosses occupy internal space within the enclosure, degrading the acoustic performance of the speaker box.

Therefore, there is a need to provide a new speaker box to solve the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a can increase the speaker box of casing inner space.

In order to achieve the above object, the present invention provides a speaker box,

a loudspeaker box comprises a shell with an accommodating space and a sound production monomer with a vibrating diaphragm, wherein the sound production monomer is accommodated in the shell, the vibrating diaphragm divides the accommodating space into a front cavity and a rear cavity, the shell is also provided with a main body part which is fixed on the bottom wall by injection molding, a main body part which extends to the accommodating space and is fixed on the bottom wall by injection molding, and a flexible circuit board which is used for being electrically connected with an external circuit and is provided with a bonding pad, the loudspeaker box further comprises a soldering lug which is fixed on the main body part of the bottom wall by injection molding, a first electric connection part which extends to the retaining wall and is fixed on the bottom wall by injection molding, a second electric connection part which extends to the retaining wall from the main body part and is formed on the bottom wall by injection molding, wherein the first electric connection part is electrically connected with the external circuit, the second electricity connection portion certainly expose in the diapire and with the pad electricity is connected, its characterized in that, the barricade is being close to one side of second electricity connection portion is equipped with passageway portion, flexible circuit board still includes certainly the kink that the sound production monomer stretches out, the kink passes passageway portion and with the pad is connected.

Preferably, the bending portion includes a first circuit portion and a second circuit portion that are connected to each other and form an included angle, the first circuit portion is electrically connected to the sound generating unit, and the second circuit portion is electrically connected to the bonding pad.

Preferably, the first circuit portion is perpendicular to the second circuit portion, the first circuit portion is located in the channel portion, and the second circuit portion and the sounding unit are located at two ends of the channel portion.

Preferably, the retaining wall is provided with a recessed portion on a side close to the second electrical connection portion, and the recessed portion is communicated with the channel portion.

Preferably, the housing includes a front cover and a rear cover enclosing with the front cover to form the accommodating space, and the bottom wall is disposed on the front cover.

Preferably, the front cover comprises a plastic part and a reinforcing rigid body fixed to the plastic part in an injection molding manner, and the soldering lug is fixed to the plastic part in an injection molding manner.

Preferably, the reinforcing rigid body comprises a body and a plurality of surrounding walls formed by extending from the body into the plastic part, the surrounding walls surround to form through holes, and the through holes are filled with the plastic of the plastic part.

Preferably, the reinforcing rigid body is made of a metal material.

Compared with the prior art, the loudspeaker box is provided with the channel part on the retaining wall, the bonding pad is arranged on the bottom wall, and the bent part of the flexible circuit board penetrates through the channel part and is connected with the bonding pad, so that a boss for fixing the bonding pad is not required to be arranged, the volume of a rear cavity is increased, and the acoustic performance of the loudspeaker box is improved; the passage part can be used for the flexible circuit board to pass through, and is convenient for the flexible circuit board to be arranged, the structure is simple, and the practicability is high.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and 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 without inventive work, wherein:

fig. 1 is an exploded view of a preferred embodiment of the speaker box of the present invention;

FIG. 2 is a schematic view of a plastic part of the loudspeaker enclosure of FIG. 1;

FIG. 3 is an assembled schematic view of the speaker cabinet of FIG. 1;

FIG. 4 is a schematic view of the speaker box assembly of FIG. 3 with the rear cover removed;

FIG. 5 is a cross-sectional view of the loudspeaker enclosure of FIG. 3 taken along the direction A-A;

fig. 6 is an enlarged view of a portion B in the speaker box shown in fig. 4;

fig. 7 is an enlarged view of a portion C in the speaker box shown in fig. 5.

[ detailed description ] embodiments

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.

Referring to fig. 1 to 7, the speaker box includes a housing 10 having an accommodating space 11, a sound generating unit 40 having a diaphragm, and a bonding pad 50 for electrically connecting the sound generating unit 40 to an external circuit, wherein the sound generating unit 40 is accommodated in the housing 10, the diaphragm divides the accommodating space 11 into a front cavity 111 and a rear cavity 112, and the bonding pad 50 is fixed to the housing 10. The housing 10 includes a front cover 20 and a rear cover 30 enclosing the front cover 20 to form the receiving space 11, and the front cover 20 is provided with a sound outlet passage 2131 communicating with the external environment and the front cavity 111. The sounding unit 40 is provided with a flexible circuit board 41 for electrically connecting with an external circuit, one end of the soldering lug 50 is electrically connected with the flexible circuit board 41, and the other end is exposed out of the casing 10.

Specifically, as shown in fig. 1 and 2, the front cover 20 includes a plastic part 21 and a reinforcing rigid body 22 fixed to the plastic part 21 by injection molding, and the soldering lug 5 is fixed to the plastic part 21 by injection molding. The plastic part 21 comprises a retaining wall 211, a bottom wall 212 connected with one end of the retaining wall 211, a sound emitting part 213 protruding from one side of the retaining wall 211, a mounting groove 214 formed by enclosing the retaining wall 211 and the bottom wall 212, a channel part 215 arranged on the retaining wall 211 and communicated with the mounting groove 214, and a concave part 216 arranged on the retaining wall 211 and communicated with the channel part 215.

The retaining wall 211 includes an outer wall 2111 opposite to the soldering terminal 5, and the soldering terminal 5 is located in the receiving space 11, and one end of the soldering terminal extends to a position close to the outer wall 2111. The channel portion 215 is disposed on the outer wall 2111 and penetrates the outer wall 2111, and the recess portion 216 is recessed in the outer wall 2111 and is closer to the bottom wall 212 than the channel portion 215. That is to say, the channel part 215 is a groove structure with two open ends, which is arranged at one end of the retaining wall 211 far away from the bottom wall 212, and the recess part 216 is a groove structure formed by recessing the outer wall 2111 of the retaining wall 211 at a position close to the bottom wall 212.

The soldering terminal 5 is fixed to the bottom wall 212 by injection molding, and one end of the soldering terminal 5 is close to the outer wall 2111 and adjacent to the channel portion 215 and the recess 216, so that the flexible circuit board 40 passes through the channel portion 215 and is electrically connected to the soldering terminal 5.

The reinforcing rigid body 22 includes a body 221 and a plurality of walls 222 extending from the body 221 into the plastic part 21, the walls 222 surround to form through holes 223, and the through holes 223 are filled with the plastic of the plastic part 21.

In the present embodiment, the reinforcing rigid body 22 is made of a metal material. The reinforcing rigid body 22 made of a metal material is advantageous not only for reinforcing the strength of the front cover 20 but also for heat dissipation of the speaker box 100. Typically, the reinforcing rigid body 22 is made of steel material.

It is understood that in other embodiments, the composition of the front cover 20 is not limited thereto, and for example, the front cover 20 may be configured to be made of only plastic.

Further, the flexible circuit board 40 includes a bending portion 411 electrically connected to the voice coil in the sound generating unit 40 and a pad 412 electrically connected to the bending portion 411, and the pad 412 is used to be welded to the soldering lug 50 through soldering tin, so that the voice coil can drive the diaphragm to vibrate and generate sound after being powered on, and the sound generated by vibration of the diaphragm is transmitted to the outside through the front cavity 111 and the sound outlet channel 2131 in sequence. The sound generating unit 40 is mounted in the mounting groove 214 of the plastic part 11, and a diaphragm of the sound generating unit 40 and the bottom wall 212 are spaced to form the front cavity 111. The bending portion 411 passes through the channel portion 215 and is connected to the pad 412.

Specifically, the bending portion 411 includes a first circuit portion 4111 and a second circuit portion 4112 that are connected to each other and form an included angle, the first circuit portion 4111 is electrically connected to the sound generating unit 40, and the second circuit portion 4112 is electrically connected to the pad 412. In this embodiment, the first circuit portion 411 is substantially perpendicular to the second circuit portion 412, the first circuit portion 4111 is located in the channel portion 215, and the second circuit portion 4112 and the sound generating unit 40 are located at two ends of the channel portion 215.

It should be noted that the retaining wall 211 is located in the rear cavity 112, therefore, the retaining wall 211 occupies a part of the space of the rear cavity 112, and the volume of the retaining wall 211 is reduced by disposing the channel portion 215 and the recess 216 on the retaining wall 211 of the speaker box 100, so as to increase the volume of the rear cavity 112, and further improve the performance of the speaker box 100.

In addition, the first circuit portion 4111 of the flexible circuit board 40 is located in the channel portion 215, and the second circuit portion 4112 is disposed opposite to the recessed portion 216, so that the first circuit portion 4111 and the second circuit portion 4112 have an avoiding space, and the flexible circuit board 40 is prevented from being dragged by an external force and being disconnected from the sound generating unit 40 or the soldering lug 5.

Further, the soldering lug 5 comprises a main body part 51 fixed on the bottom wall 212 by injection molding, a first electrical connection part 52 extending from the main body part 51 to the outside of the accommodating space 11 and fixed on the bottom wall 212 by injection molding, and a second electrical connection part 53 extending from the main body part 51 to the retaining wall 211 and fixed on the bottom wall 212 by injection molding. The first electrical connection portion 52 is electrically connected to an external circuit, and the second electrical connection portion 53 is exposed from the bottom wall 212 and electrically connected to the pad 412.

As shown in fig. 1 and fig. 3, two bonding pads 412 and two soldering lugs 5 are provided, the two bonding pads 412 are respectively a positive bonding pad and a negative bonding pad and are located on the same side of the sound generating unit 40, and the two soldering lugs 5 are respectively a positive soldering lug and a negative soldering lug. It will be appreciated that in other embodiments, ground pads and ground tabs may also be provided.

As shown in fig. 3, the pad 412 is far from the outer contour of the product (the soldering lug 5 has a long length), and the relative positions of the first electrical connection portion 52 and the second electrical connection portion 53 of the soldering lug 5 in the injection mold cannot be ensured by the strength of the soldering lug 5 itself. In the present embodiment, the main body 51 is provided with a positioning hole 54. By providing the positioning hole 54 on the main body portion 51, the relative positions of the first electrical connection portion 52 and the second electrical connection portion 53 in the injection mold can be ensured.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A loudspeaker box comprises a shell with an accommodating space and a sound production monomer with a vibrating diaphragm, wherein the sound production monomer is accommodated in the shell, the vibrating diaphragm divides the accommodating space into a front cavity and a rear cavity, the shell is also provided with a main body part which is fixed on the bottom wall by injection molding, a main body part which extends to the accommodating space and is fixed on the bottom wall by injection molding, and a flexible circuit board which is used for being electrically connected with an external circuit and is provided with a bonding pad, the loudspeaker box further comprises a soldering lug which is fixed on the main body part of the bottom wall by injection molding, a first electric connection part which extends to the retaining wall and is fixed on the bottom wall by injection molding, a second electric connection part which extends to the retaining wall from the main body part and is formed on the bottom wall by injection molding, wherein the first electric connection part is electrically connected with the external circuit, the second electricity connection portion certainly expose in the diapire and with the pad electricity is connected, its characterized in that, the barricade is being close to one side of second electricity connection portion is equipped with passageway portion, flexible circuit board still includes certainly the kink that the sound production monomer stretches out, the kink passes passageway portion and with the pad is connected.

2. The speaker box according to claim 1, wherein the bent portion includes a first circuit portion and a second circuit portion connected to each other and forming an included angle, the first circuit portion is electrically connected to the sound generating unit, and the second circuit portion is electrically connected to the bonding pad.

3. The speaker box according to claim 2, wherein the first circuit portion is perpendicular to the second circuit portion, the first circuit portion is located in the channel portion, and the second circuit portion and the sound generating unit are located at both ends of the channel portion.

4. The speaker cabinet as claimed in claim 1, wherein the dam is further provided with a recess on a side close to the second electrical connection portion, the recess communicating with the passage portion.

5. The speaker box according to any one of claims 1-4, wherein the housing comprises a front cover and a rear cover enclosing the front cover to form the receiving space, and the bottom wall is disposed on the front cover.

6. The loudspeaker box of claim 5, wherein the front cover comprises a plastic member and a reinforcing rigid body injection-molded and fixed to the plastic member, and the soldering lug is injection-molded and fixed to the plastic member.

7. A loudspeaker enclosure according to claim 6, wherein the reinforcing rigid body comprises a body and walls extending from the body into the plastics material, the walls enclosing a through-hole filled with the plastics material of the plastics material.

8. A loudspeaker enclosure according to claim 6, wherein the stiffening rigid body is made of a metal material.