WO2021007798A1

WO2021007798A1 - Speaker box

Info

Publication number: WO2021007798A1
Application number: PCT/CN2019/096301
Authority: WO
Inventors: 孟义明; 张古清
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2019-07-16
Filing date: 2019-07-17
Publication date: 2021-01-21
Also published as: CN110278517A

Abstract

Provided in the present application is a speaker box, comprising an upper shell, a lower shell cooperating with the upper shell to form an accommodating space, and a speaker unit accommodated in the accommodating space. The speaker unit comprises a basket frame, and an upper cover, a vibration system and a magnetic circuit system fixed to the basket frame, wherein the vibration system comprises a diaphragm used for vibration and sound production; the upper shell, the upper cover and the diaphragm cooperate with one another to form a front sound cavity; the lower shell, the upper shell, the upper cover and the diaphragm cooperate with one another to form a rear cavity; the rear cavity comprises a first rear cavity provided in the speaker unit, and a second rear cavity located outside the speaker unit and communicating with the first rear cavity; and the basket frame is provided with a communication hole for communicating the front sound cavity with the second rear cavity. The speaker box of the present application can balance the air pressure of the front sound cavity and the rear cavity.

Description

Speaker box

Technical field

This application relates to the field of sound-to-electric conversion, in particular to a speaker box.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, mobile phones have extremely diverse functions, one of which is high-quality music functions. Therefore, speaker boxes for playing sound are widely used in current smart mobile devices.

In related technologies, the speaker box includes an upper cover, a basin frame, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm. The upper cover and the diaphragm form a front acoustic cavity. The diaphragm, basin frame and magnetic circuit system cooperate to form a rear cavity. The rear cavity is closed. In wearable devices or mobile phones, when the speaker box is energized, the temperature of the rear cavity rises due to heat, which causes the pressure in the back cavity to increase, thereby forcing the diaphragm of the speaker box to move toward the sound cavity. , Weaken the vibration of the diaphragm, make the sound of the speaker box smaller or silent.

Therefore, it is necessary to provide a new speaker box to solve the above problems.

technical problem

Technical solutions

The purpose of this application is to provide a speaker box capable of balancing the air pressure of the front sound cavity and the rear cavity.

The present application provides a speaker box, which includes an upper shell, a lower shell that cooperates with the upper shell to form an accommodating space, and a speaker unit accommodated in the accommodating space. The speaker unit includes a basin frame and is fixed to the basin The upper cover, the vibration system and the magnetic circuit system of the rack, the vibration system includes a diaphragm for vibrating and sounding, the upper shell, the upper cover and the diaphragm form a front acoustic cavity, the lower shell, the upper shell , The upper cover and the diaphragm cooperate to form a rear cavity, and the rear cavity includes a first rear cavity arranged in the speaker unit and a second rear cavity located outside the speaker unit and communicating with the first rear cavity In the rear cavity, the basin frame is provided with a communication hole connecting the front acoustic cavity and the second rear cavity.

Preferably, the speaker box further includes an air-permeable spacer, and the air-permeable spacer covers the communication hole.

Preferably, the communication hole includes a first through hole arranged parallel to the vibration direction of the vibration system and a second through hole arranged perpendicular to the vibration direction of the vibration system, and the first through hole communicates with the front An acoustic cavity and the second through hole, and the second through hole communicates with the second rear cavity.

Preferably, the basin frame includes a first surface for fixing the diaphragm, the first surface is ring-shaped, and the first surface includes a first part for fixing the diaphragm.

Preferably, the upper cover includes a body part suspended above the diaphragm and a fixing part fixed to the basin frame, and the first surface of the basin frame includes a second part fixing the fixing part, so The first through hole penetrates the basin frame from the first surface along the vibration direction of the vibration system, and the first through hole is located between the first part and the second part.

Preferably, the basin frame further includes an outer side surface extending from the outer periphery of the first surface in a direction away from the upper shell, and the second through hole vibrates from the outer side surface perpendicular to the vibration system. The directional recess is formed and connected with the first through hole.

Preferably, the magnetic circuit system includes a magnetic yoke fixed below the basin frame, a main magnet fixed to the magnetic yoke, a secondary magnetic steel spaced apart from the main magnetic steel, and a secondary magnetic steel attached to the secondary The secondary pole core on the surface of the magnetic steel, the secondary pole core is arranged close to the main magnetic steel, and the first through hole is located outside the secondary pole core and away from the main magnetic steel.

Preferably, the breathable spacer is fixed on the first surface, and the breathable spacer is a breathable waterproof membrane.

Preferably, the number of the communication holes is multiple, and the plurality of communication holes are sequentially arranged at intervals.

Beneficial effect

Compared with the related art, the speaker box provided in the present application is provided with the communication hole connecting the front acoustic cavity and the second rear cavity, so that the front acoustic cavity, the first rear cavity and the second rear cavity are sequentially Communication, so that the air pressure in the front acoustic cavity and the back cavity can be kept in a balanced state, avoiding the expansion of the gas in the back cavity and squeezing the diaphragm to reduce the amplitude of the diaphragm, ensuring the The amount of vibration of the diaphragm improves the acoustic performance of the speaker box. At the same time, the air-permeable isolator completely covers the communication hole, which can increase the waterproof performance of the speaker box.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative work, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the speaker box provided by this application;

Figure 2 is a schematic diagram of an exploded structure of the speaker box shown in Figure 1;

Figure 3 is a cross-sectional view of the speaker box shown in Figure 1 along the line III-III;

Figure 4 is an assembly diagram of the upper shell and the speaker unit;

Fig. 5 is a cross-sectional view of the speaker box shown in Fig. 1 along the line V-V.

The best mode of the invention

The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

Please refer to Figures 1-5, Figure 1 is a schematic diagram of the three-dimensional structure of the speaker box provided by this application; Figure 2 is a schematic diagram of the exploded structure of the speaker box shown in Figure 1; Figure 3 is the speaker box shown in Figure 1 along III- A cross-sectional view along line III; Figure 4 is an assembly diagram of the upper shell and the speaker unit; Figure 5 is a cross-sectional view of the speaker box shown in Figure 1 along the line VV. The present application provides a speaker box 100. The speaker box 100 includes an upper shell 10, a lower shell 20 that cooperates with the upper shell 10 to form an accommodation space, and a speaker unit 30 accommodated in the accommodation space.

The upper housing 10 includes a top plate 101, a side plate 102 bent and extended from the edge of the top plate 101 in the direction of the lower housing 20, and a side plate 102 extending from the middle area of the top plate 101 in a direction close to the speaker unit 30 Support plate 103. The lower shell 20 is correspondingly arranged on the side plate 102, and the speaker unit 30 abuts on the supporting plate 103.

The top plate 101 is provided with a sound outlet 1010 communicating with the outside, the speaker unit 30 vibrates and produces sound, and the sound outlet 1010 is used to conduct sound to the outside.

The speaker unit 30 includes a basin frame 2 and an upper cover 1 fixed to the basin frame 2, a vibration system 3, a magnetic circuit system 4, an air-permeable spacer 5 and a conductive terminal 6. The vibration system 3 includes a diaphragm 31 for vibrating and sounding. The upper cover 1 is sandwiched between the diaphragm 31 and the upper casing 10, and the upper casing 10, the upper cover 1 and the The diaphragm 31 forms a front acoustic cavity 70, and the lower casing 20, the upper casing 10, the upper cover 1 and the diaphragm 31 cooperate to form a rear cavity 80. Further, the rear cavity 80 includes a first rear cavity 801 arranged in the speaker unit 30 and a second rear cavity 802 located outside the speaker unit 30 and communicating with the first rear cavity 801.

The upper cover 1 and the upper shell 10 are fixedly connected by an adhesive layer 90. Specifically, the adhesive layer 90 is in a rectangular ring shape and is disposed between the top plate 101 and the upper cover 1.

The upper cover 1 includes a body portion 11 suspended above the diaphragm 31 and a fixing portion 12 extending from the edge of the body portion 11 in a direction close to the basin frame 2. The fixing portion 12 and the The main body portion 11 is integrally provided. Further, the main body portion 11 is provided with a sound outlet 13 corresponding to the dome position of the diaphragm 31, and the sound outlet 13 is in communication with the front acoustic cavity 70 for conducting sound To the outside world. One end of the fixing portion 12 is connected to the body portion 11, and the other end is abutted and fixed with the basin 2.

The basin frame 2 includes a first surface 21 and an outer surface 22. Specifically, the first surface 21 is in a rectangular ring shape, the diaphragm 31 is held on the inner periphery of the first surface 21, and the fixing portion 12 is held on the outer periphery of the first surface 21, The first surface 21 includes a first portion 211 for fixing the diaphragm 31 and a second portion 212 for fixing the fixing portion 12; the outer side surface 22 is away from the upper surface from the outer periphery of the first surface 21 The direction of the cover 1 extends.

The basin frame 2 is also provided with a communication hole 23 that communicates the front acoustic cavity 70 and the second rear cavity 802. The communication hole 23 includes a first through hole 231 arranged in parallel to the vibration direction of the vibration system 3 and an edge A second through hole 232 is arranged perpendicular to the vibration direction of the vibration system 3, the first through hole 231 communicates with the front acoustic cavity 70 and the second through hole 232, and the second through hole 232 communicates with the first through hole 232. Two rear cavity 802.

Further, the first through hole 231 penetrates the basin frame 2 from the first surface 21 along the vibration direction of the vibration system 3, and the first through hole 231 is located between the first part 211 and the first part 211 Between the two parts 212; the second through hole 232 is recessed from the outer side surface 22 along the vibration direction perpendicular to the vibration system 3, and the second through hole 232 is connected to the first through hole 231.

Preferably, the number of the communication holes 23 may be one or multiple. When the number of the communication holes 23 is multiple, a plurality of the communication holes 23 are arranged at intervals. In this embodiment, the number of the communicating holes 23 is two, and the two through holes 23 are symmetrically arranged on the two long sides of the basin frame 2. Of course, the communicating hole 23 can also be provided on the short side of the basin frame 2, and can also be provided on the long side and the short side of the basin frame 2 at the same time, which is not limited in this application.

Furthermore, the basin frame 2 is provided with a leakage hole 25 which communicates with the first rear cavity 801 and the second rear cavity 802 for balancing the first rear cavity 801 and the The air pressure in the second rear cavity 802 reduces high-frequency noise.

The vibration system 3 is used for vibration and sound. Specifically, the vibration system 3 includes the diaphragm 31 for vibrating and sounding and a voice coil 32 located below the diaphragm 31 for driving the diaphragm 31 to vibrate and sound. , The conductive terminal 6 connects the voice coil 32 with an external power source, and provides power for the voice coil 32.

The magnetic circuit system 4 is used to drive the vibration system 3 to vibrate and produce sound. Specifically, the magnetic circuit system 4 includes a yoke 41 exposed outside the basin frame 2, a main magnet 42 assembled in the center of the yoke 41, and a magnet attached to the surface of the main magnet 42 The main pole core 43, the secondary magnetic steel 44 ringed around the main magnetic steel 42, and the secondary pole core 45 attached to the surface of the secondary magnetic steel 44. The main magnet 42 and the auxiliary magnet 44 are spaced to form a magnetic gap, and the voice coil 32 is suspended in the magnetic gap. The main pole core 43 and the secondary pole core 45 are made of a magnetically conductive material and play a role of magnetically conductive.

It should be noted that the secondary pole core 45 is located close to the main magnet 42, and the first through hole 231 is located outside the secondary pole core 45 and away from the main magnet 42.

During the use of the speaker box 100, due to the increase in temperature, the temperature in the second rear cavity 52 increases, and the air expands due to heat, which causes the pressure in the second rear cavity 802 and the first rear cavity 801 to increase The communication hole 23 communicates the second rear cavity 802 and the front acoustic cavity 70, and the leakage hole 21 communicates the first rear cavity 801 and the second rear cavity 802, which can balance the front acoustic cavity 70 The pressure difference with the back cavity 80 prevents the diaphragm 31 from moving under the pressure of the gas in the second back cavity 802, ensures the vibration of the diaphragm 31, and improves the acoustics of the speaker box 100 performance.

The air-permeable spacer 5 covers the communicating hole. Specifically, the air-permeable spacer 5 is fixed to the first surface 21 and covers the first through hole 231. Preferably, in this embodiment, the basin frame 2 is further provided with a receiving groove 24 recessed from the first surface 21 in a direction away from the upper cover 1, and the air-permeable spacer 5 is received and fixed in the In the receiving groove 24, the thickness of the air-permeable spacer 5 is less than or equal to the depth of the receiving groove 24, so that the air-permeable spacer 5 does not protrude from the first surface 24. More preferably, the breathable isolation member 5 is a breathable waterproof membrane, which increases the waterproof performance of the speaker box 100.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these all belong to this application. The scope of protection.

Embodiments of the invention

Type here a paragraph describing the embodiment of the present invention.

Industrial applicability

Type a paragraph describing industrial applicability here.

Sequence Listing Free Content

Type here the free content description paragraph of the sequence listing.

Claims

A speaker box includes an upper shell, a lower shell that cooperates with the upper shell to form an accommodating space, and a speaker unit accommodated in the accommodating space. The speaker unit includes a basin frame and an upper portion fixed to the basin frame. A cover, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm for vibrating and sounding. The upper shell, the upper cover and the diaphragm form a front acoustic cavity. The lower shell, the upper shell, and the The upper cover and the diaphragm cooperate to form a rear cavity, and the rear cavity includes a first rear cavity arranged in the speaker unit and a second rear cavity located outside the speaker unit and communicating with the first rear cavity, It is characterized in that the basin frame is provided with a communication hole connecting the front acoustic cavity and the second rear cavity.
The speaker box according to claim 1, wherein the speaker box further comprises an air-permeable spacer, and the air-permeable spacer covers the communication hole.
The speaker box according to claim 2, wherein the communication hole comprises a first through hole arranged in parallel to the vibration direction of the vibration system and a second through hole arranged in a direction perpendicular to the vibration system of the vibration system. The first through hole communicates with the front acoustic cavity and the second through hole, and the second through hole communicates with the second rear cavity.
The speaker box according to claim 3, wherein the basin frame includes a first surface for fixing the diaphragm, the first surface is ring-shaped, and the first surface includes fixing the diaphragm The first part.
The speaker box according to claim 4, wherein the upper cover comprises a body part suspended above the diaphragm and a fixing part fixed to the basin frame, and the first surface of the basin frame comprises To fix the second part of the fixing part, the first through hole penetrates the basin frame along the vibration direction of the vibration system from the first surface, and the first through hole is located between the first part and the Between the second part.
The speaker box according to claim 5, wherein the basin frame further comprises an outer surface extending from the outer periphery of the first surface in a direction away from the upper shell, and the second through hole is formed from The outer side surface is recessed and formed along a vibration direction perpendicular to the vibration system, and is connected with the first through hole.
The speaker box according to claim 6, wherein the magnetic circuit system includes a magnetic yoke fixed below the basin frame, a main magnet fixed to the magnetic yoke, and a space between the main magnet The secondary magnetic steel and the secondary pole core attached to the surface of the secondary magnetic steel, the secondary pole core is arranged close to the main magnetic steel, and the first through hole is located outside the secondary pole core and away from the main Magnet setting.
The speaker box according to claim 6, wherein the air-permeable spacer is fixed to the first surface, and the air-permeable spacer is a breathable and waterproof membrane.
The speaker box according to claim 1, wherein the number of the communication holes is multiple, and the plurality of communication holes are sequentially arranged at intervals.
Type claim 10 here.