WO2022067901A1

WO2022067901A1 - Loudspeaker box and terminal device

Info

Publication number: WO2022067901A1
Application number: PCT/CN2020/121985
Authority: WO
Inventors: 肖波
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: 2020-09-29
Filing date: 2020-10-19
Publication date: 2022-04-07
Also published as: CN111970590A; CN111970590B

Abstract

The present application provides a loudspeaker box and a terminal device. The loudspeaker box comprises a metal bottom housing, a plastic part and a loudspeaker unit, wherein the metal bottom housing is provided with an accommodating cavity; the loudspeaker unit is at least partially accommodated in the accommodating cavity; the metal bottom housing is provided with an antenna signal interference key area; the metal bottom housing is configured to be a through hole at the antenna signal interference key area; and the plastic part is embedded in the through hole. In the loudspeaker box provided in the present application, the antenna signal interference key area is configured to be a through hole, and the plastic part is embedded in the through hole, such that the influence of the metal bottom housing on the antenna performance can be effectively reduced under the conditions of maintaining a good strength and heat dissipation effect of the metal bottom housing.

Description

Speaker box and terminal equipment

technical field

The present application relates to the technical field of acoustic design, and in particular, to speaker boxes and terminal equipment.

Background technique

The speaker box is an essential part of terminal equipment (such as mobile phones). The bottom shell of the existing speaker box is mostly made of plastic. The bottom shell made of plastic has slow heat dissipation and low strength, and cannot meet the needs of the market. There are some speaker boxes with metal bottom shells, which have the advantages of large back cavity, fast heat conduction and high strength. However, the metal bottom case has a performance impact on the antenna of the terminal device, which limits the application of the speaker box.

Therefore, it is necessary to study a new type of speaker box to solve the above problems.

technical problem

The metal bottom shell of the speaker box has a performance impact on the antenna of the terminal device, which limits the application of the speaker box.

technical solutions

One of the objectives of the present application is to provide a speaker box, the metal bottom shell of the speaker box can effectively reduce the influence on the antenna under the condition of better strength and heat dissipation effect. The second purpose of the present application is to provide a terminal device, which adopts the above-mentioned speaker box.

One of the objectives of the present application is achieved by the following technical solutions: a speaker box for a terminal device with an antenna, the speaker box includes a metal bottom case, a plastic part and a speaker unit, and the metal bottom case has a receiving cavity, The speaker unit is at least partially accommodated in the accommodating cavity, the metal bottom case has an antenna signal interference critical area, the metal bottom case is set as a through hole at the antenna signal interference critical area, and the plastic part embedded in the through hole.

As an improvement, the plastic part is a plastic part made of LCP or PBT or PPS or PPO or PP or PET or PEN material.

As an improvement, the plastic part is injection-molded on the metal bottom case.

As an improvement, the through hole includes a through hole portion and a conical hole portion communicated with the through hole portion, the conical hole portion communicates with the receiving cavity, and the diameter of the conical hole portion is larger than The diameter of the through hole portion and the shape of the plastic part are adapted to the shape of the through hole.

As an improvement, the speaker unit includes a vibration system, a magnetic circuit system for driving the vibration system to vibrate and sound, and a basin frame for installing the vibration system and the magnetic circuit system, the basin The frame is at least partially accommodated in the accommodating cavity; the metal bottom case is provided with an assembly hole, and the outer side surface of the basin frame is formed with a protrusion embedded in the assembly hole.

As an improvement, the basin frame is formed on the metal bottom case by injection molding.

As an improvement, the speaker box further includes a ventilating spacer arranged on the inner side of the basin frame, the ventilating spacer and the top of the basin frame are enclosed to form a front cavity, the ventilating spacer, the The metal bottom shell and the bottom of the basin frame form a back cavity, and the vibration system and the magnetic circuit system are arranged in the front cavity.

As an improvement, the metal bottom case is provided with a filling hole that communicates with the rear cavity, and the rear cavity is filled with sound-absorbing particles.

The second objective of the present application is achieved by the following technical solutions: a terminal device, comprising a casing and the above speaker box, the casing includes a casing body and at least one antenna, and the casing body encloses a receiving cavity and opens There is an opening communicated with the receiving cavity, the antenna is arranged on the housing body and at least partially extends to the outer circumference of the opening; the metal bottom shell includes a bottom plate and a side surrounding the bottom plate The speaker box is arranged in the receiving cavity and the bottom plate is exposed to the outside of the receiving cavity through the opening, and the antenna signal interference critical area is located on the side of the bottom plate close to the antenna.

As an improvement, the antenna is formed on the outer surface of the housing body by using laser direct forming technology.

beneficial effect

Compared with the prior art, in the embodiment of the present application, by setting the key area of the antenna signal interference as a through hole, and embedding a plastic part at the through hole, while maintaining the metal bottom case with good strength and heat dissipation effect, It can effectively reduce the influence of the metal bottom case on the antenna performance.

Description of drawings

FIG. 1 is a schematic structural diagram of a speaker box provided by an embodiment of the present application.

FIG. 2 is an exploded schematic view of the speaker cabinet shown in FIG. 1 .

FIG. 3 is a schematic view of the section A-A in FIG. 2 .

FIG. 4 is a partial enlarged schematic view of B in FIG. 3 .

FIG. 5 is a schematic diagram of a modified embodiment of the through hole.

FIG. 6 is a schematic diagram of another variant embodiment of the through hole.

FIG. 7 is a schematic diagram of another variant embodiment of the through hole.

FIG. 8 is a schematic diagram of another variant embodiment of the through hole.

FIG. 9 is an exploded schematic diagram of a speaker box provided by another embodiment of the present application.

FIG. 10 is a schematic cross-sectional view of C-C in FIG. 9 .

FIG. 11 is a partial enlarged schematic diagram of the position D in FIG. 10 .

FIG. 12 is a schematic diagram of a variant embodiment of the mounting hole.

FIG. 13 is a schematic diagram of another variant embodiment of the mounting hole.

FIG. 14 is a schematic structural diagram of a speaker box provided by another embodiment of the present application.

FIG. 15 is a schematic cross-sectional view of E-E in FIG. 14 .

Figure 16 is a schematic exploded view of the vibration system.

Figure 17 is an exploded schematic diagram of the magnetic circuit system.

FIG. 18 is an exploded schematic diagram of a speaker box provided by another embodiment of the present application.

FIG. 19 is a schematic partial structural diagram of a terminal device provided by an embodiment of the present application.

FIG. 20 is an exploded schematic view of the structure shown in FIG. 19 .

Embodiments of the present invention

The present application will be further described below with reference to the accompanying drawings and embodiments.

It should be noted that all directional indications (such as up, down, left, right, front, back, inside, outside, top, bottom...) in the embodiments of the present application are only used to explain the As shown in the figure), the relative positional relationship between the components, etc., if the specific posture changes, the directional indication also changes accordingly.

It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

As shown in FIGS. 1-2 , an embodiment of the present application provides a speaker box 100 for a terminal device with an antenna. The speaker box 100 includes a metal bottom case 10 , a plastic part 20 and a speaker unit 30 . The metal bottom case 10 has an accommodating cavity 11, the speaker unit 30 is at least partially accommodated in the accommodating cavity 11, the metal bottom case 10 has an antenna signal interference key area 12, the metal bottom case 10 is set as a through hole 13 at the antenna signal interference key area, and the plastic parts 20 is embedded in the through hole 13 . By setting the antenna signal interference critical area 12 as the through hole 13, and embedding the plastic part 20 at the through hole 13, the metal bottom case 10 can be effectively reduced while maintaining the metal bottom case 10 with good strength and heat dissipation effect. effect on antenna performance. Wherein, the antenna signal interference critical area 12 can be obtained by simulation.

Optionally, the metal bottom case 10 includes a bottom plate 14 and a side plate 15 . The side plate 15 is formed around the edge of the bottom plate 14 to form the receiving cavity 11 , and the through hole 13 is provided on the bottom plate 14 of the metal bottom case 10 .

Optionally, the metal bottom case 10 is integrally formed by stamping a stainless steel plate. Of course, the metal bottom case 10 can also be formed by integral stamping of other metals, such as aluminum alloys.

Optionally, the plastic part 20 is LCP (Liquid Crystal Polymer, liquid crystal polymer) or PBT (Polybutylene terephthalate, polybutylene terephthalate) or PPS (Phenylenesulfide, PPS plastic material) or PPO (Polyphenylene) Oxide, polyphenylene ether) or PP (polypropylene, polypropylene) or PET (Polyethylene terephthalate, polyethylene terephthalate) or PEN (Polyethylene Plastic parts made of naphthalate two formic acid glycol ester, polyethylene naphthalate). The plastic part 20 made of the above-mentioned materials has high thermal conductivity, low dielectric constant and low dielectric loss, and can effectively maintain the high strength of the metal bottom case 10 and the good heat dissipation effect. The influence of the metal bottom case 10 on the antenna performance is reduced.

Optionally, the plastic part 20 is injection-molded on the metal bottom case 10 .

As shown in FIGS. 3-4 , the through hole 13 includes a through hole portion 131 and a conical hole portion 132 communicating with the through hole portion 131 . The conical hole portion 132 communicates with the receiving cavity 11 , and the diameter of the conical hole portion 132 is larger than that of the through hole portion 132 . The diameter of the hole portion 131 and the shape of the plastic part are adapted to the shape of the through hole 13 . Wherein, the through hole portion 131 means that the hole wall of the hole has no pore diameter change, and the hole wall is parallel to the normal direction of the bottom plate 14 , and the definition is used in the following. In this embodiment, compared with the method of setting the through hole 13 as a straight hole, by providing the tapered hole portion 132, not only the contact area between the plastic part 20 and the metal bottom case 10 can be increased, but also the plastic part 20 can be more easily after injection molding. It is well fixed on the metal bottom case 10 , and the edge of the plastic part 20 can be clamped on the metal bottom case 10 , so that the plastic part 20 is not easy to fall off from the through hole 13 .

Shown in FIG. 5 is a modified embodiment of the through hole 13. In this embodiment, the through hole 13a includes a first through hole portion 13a1 and a second through hole portion communicating with the first through hole portion 13a1. 13a2, the second through hole 13a2 communicates with the receiving cavity 11, the diameter of the second through hole 13b2 is larger than that of the first through hole 13a1, and the shape of the plastic part matches the shape of the through hole 13a. In the same way, this embodiment can not only increase the contact area between the plastic part and the metal bottom case, so that the plastic part can be better fixed on the metal bottom case after injection molding, and the edge of the plastic part can be clamped on the metal bottom case, so that the plastic part can be fixed on the metal bottom case. Pieces do not easily fall out of through holes.

6 is another variant embodiment of the through hole 13. In this embodiment, the through hole 13b is a tapered hole. The closer the through hole 13b is to the receiving cavity 11, the larger the diameter of the through hole 13b. In the same way, this embodiment can not only increase the contact area between the plastic part and the metal bottom case, so that the plastic part can be better fixed on the metal bottom case after injection molding, and the edge of the plastic part can be clamped on the metal bottom case, so that the plastic part can be fixed on the metal bottom case. Pieces do not easily fall out of through holes.

It should be noted that the through holes are not limited to 13, 13a, 13b, as long as the side of the through holes close to the receiving cavity 11 has a larger diameter, so that the connection between the plastic part and the metal bottom case is more secure.

Shown in FIG. 7 is another modified embodiment of the through hole 13. In this embodiment, the through hole 13c includes a first through hole portion 13c1, a second through hole portion 13c2, and a through hole portion located in the first through hole portion 13c2. The third through hole portion 13c3 between 13c1 and the second through hole portion 13c2, the third through hole portion 13c3 communicates with the first through hole portion 13c1 and the second through hole portion 13c2, and the diameter of the first through hole portion 13c1 The diameter of the second through hole portion 13c2 is larger than that of the third through hole portion 13c3, and the shape of the plastic part matches the shape of the through hole 13c. In this embodiment, the plastic parts after injection molding can be firmly clamped to the metal bottom case.

Shown in FIG. 8 is another modified embodiment of the through hole 13. In this embodiment, the through hole 13d includes a first tapered hole portion 13d1 and a second tapered hole communicated with the first tapered hole portion 13d1. 13d2, the farther the first conical hole portion 13d1 is from the receiving cavity 11, the larger the diameter of the first conical hole portion 13d1, the closer the second conical hole portion 13d2 is to the receiving cavity 11, the larger the diameter of the second conical hole portion 13d2 is. The larger it is, the shape of the plastic piece is adapted to the shape of the through hole 13d. In this embodiment, the plastic parts after injection molding can be firmly clamped to the metal bottom case.

It should be noted that the through holes are not limited to the above-mentioned 13c and 13d arrangements, as long as the diameter of the through holes is first reduced and then increased in the thickness direction of the metal bottom case, so that the plastic parts and the metal bottom case are connection is more solid.

As shown in FIGS. 9-11 , in some embodiments, the speaker unit 30 includes a vibration system 31 , a magnetic circuit system 32 for driving the vibration system 31 to vibrate and sound, and a magnetic circuit system 32 for installing the vibration system 31 and the magnetic circuit system 32 The basin frame 33 is at least partially accommodated in the accommodating cavity 11, the side plate 15 of the metal bottom case 10 is provided with an assembly hole 16, the basin frame 33 is injection-molded on the metal bottom case 10, and the outer side of the basin frame 33 is formed with The protrusions 331 are embedded in the mounting holes 16 . In this embodiment, after injection molding, the basin frame 33 and the metal bottom case 10 can be firmly connected through the cooperation of the protrusion 331 with the mounting hole 16 . Optionally, the basin frame 33 is made of plastic material. It should be noted that the mounting holes 16 are not limited to being provided on the side plates 15 of the metal bottom case 10 . For example, the mounting holes 16 may also be provided on the bottom plate 14 of the metal bottom case 10 , depending on actual design requirements.

In some embodiments, the assembly hole 16 includes a through hole portion 161 and a tapered hole portion 162 communicating with the through hole portion 161 . The tapered hole portion 162 is provided on the side of the through hole portion 161 away from the receiving cavity 11 . The hole diameter of the portion 162 is larger than that of the through hole, and the shape of the protrusion 331 is adapted to the shape of the mounting hole. In this embodiment, by setting the assembly hole 16 to include the tapered hole portion 162, after injection molding, an inverted structure can be formed between the protrusion 331 formed on the outer side of the pot frame 33 and the metal bottom case 10, and the pot frame 33 and the metal bottom case 10 can be formed. The bonding strength of the bottom case 10 enables the basin frame 33 to be firmly connected to the metal bottom case 10 .

Shown in FIG. 12 is another modified embodiment of the mounting hole 16 , in this embodiment, the mounting hole 16a includes a first through hole portion 16a1 and a second through hole communicating with the first through hole portion 16a1 part 16a2, the second through hole part 16a2 is provided on the side of the first through hole part 16a1 away from the receiving cavity 11, the diameter of the second through hole part 16a2 is larger than that of the first through hole part 16a1, and the shape of the protrusion is The shape of the mounting hole is adapted. Similarly, in this embodiment, after injection molding, an inverted structure can be formed between the protrusion formed on the outer side of the basin frame and the metal bottom case, which increases the bonding strength between the basin frame and the metal bottom case, so that the basin frame can be stably connected. on the metal bottom case.

Figure 13 shows another variant of the mounting hole. In this embodiment, the mounting hole 16b is a tapered hole. The shape matches the shape of the mounting hole. Similarly, in this embodiment, after injection molding, an inverted structure can be formed between the protrusion formed on the outer side of the basin frame and the metal bottom case, which increases the bonding strength between the basin frame and the metal bottom case, so that the basin frame can be stably connected. on the metal bottom case.

It can be understood that the assembly holes are not limited to the arrangement of 16, 16a and 16b, as long as the assembly hole has a larger diameter on the side away from the receiving cavity 11, so that the injection-molded basin frame is formed by the protrusion and the assembly hole. The inverted buckle structure makes the basin frame can be firmly connected to the metal bottom shell.

As shown in FIG. 9 and FIGS. 14-17 , in some embodiments, the speaker box 100 further includes a ventilating spacer 40 disposed on the inner side of the basin frame 33 , and the ventilating spacer 40 and the top of the basin frame 33 are enclosed to form a front cavity 11a The bottom of the ventilating spacer 40, the metal bottom case 10 and the basin frame 33 are enclosed to form the rear cavity 11b, and the vibration system 31 and the magnetic circuit system 32 are arranged in the front cavity 11a. Optionally, the breathable spacer 40 is a breathable mesh.

In some embodiments, the basin frame 33 includes two sub-basin frames 33a arranged at intervals, and the two sub-basin frames 33a are respectively formed on opposite sides of the metal bottom case 10. In this embodiment, the occupied space of the basin frame 33 can be reduced. , so that the speaker box has a larger back cavity 11b, so as to obtain a better sound effect. Of course, the basin frame 33 can also be provided as a complete annular structure.

Exemplarily, the opposite sides of the two sub-basin frames 33a are provided with first steps 332, the opposite sides of the support plate 40 are respectively overlapped with the first steps 332 of the two sub-basin frames 33a, and the magnetic circuit system 32 is installed on the support plate 40. on board 40.

The metal bottom case 10 is provided with a filling hole 17 which communicates with the rear cavity 11 b , and the rear cavity 11 b is filled with sound-absorbing particles through the filling hole 17 .

Optionally, the vibration system 31 includes a lower sound diaphragm 311 , an annular support 312 , an annular diaphragm 313 , a voice coil bobbin 314 , a voice coil 315 and a dome 316 . Exemplarily, there are two lower sound membranes 311 , the two lower sound membranes 311 are located on opposite sides of the magnetic circuit system 32 respectively, and the outer sides of the lower sound membranes 311 are sandwiched between the basin frame 33 and the annular support 312 , for example Naturally, the basin frame 33 is provided with a second step 333, the lower surface of the outer side of the lower sound membrane 311 is overlapped with the second step 333, the annular bracket 312 is attached to the upper surface of the outer side of the lower sound membrane 311, the annular bracket 312 and the basin frame 33 clamps the outer side of the lower sound membrane 311 from the upper and lower surfaces. The outer side of the annular diaphragm 313 is connected to the annular support 312 . The voice coil bobbin 314 is connected to the inner side of the lower voice diaphragm 311 and the inner side of the annular diaphragm 313 . The voice coil 315 is connected to the voice coil skeleton 314 , and the voice coil 315 vibrates up and down under the driving of the magnetic circuit system 32 , thereby driving the lower voice membrane 311 and the annular vibrating membrane 313 to vibrate up and down to produce sound. The dome 316 is disposed inside the annular diaphragm 313 and mounted on the voice coil bobbin 314 .

In some embodiments, the voice coil bobbin 314 includes a skeleton body 3141 and a support frame 3142. The skeleton body 3141 is annular, the upper surface of the skeleton body 3141 is connected to the annular diaphragm 313, and the lower surface of the skeleton body 3141 is connected to the voice coil 315 and the lower surface. On the inner side of the sound membrane 311 , the support frame 3142 is installed on the inner side of the frame body 3141 .

In some embodiments, the vibration system 31 further includes two elastic supports 317 respectively disposed on opposite sides of the voice coil 315 , and the elastic supports 317 include an elastic support body 3171 connected to the basin frame 33 and a slave elastic support body The elastic arm 3172 of the 3171 extends toward the voice coil 315 , and one end of the elastic arm 3172 away from the elastic support body 3171 is sandwiched between the lower sound membrane 311 and the skeleton body 3141 . Preferably, the elastic support member 317 is a flexible circuit board, which not only functions as an elastic support for the voice coil 315 , but can also be used for electrical connection between the voice coil 315 and an external power source.

The magnetic circuit system 32 includes a magnetic bowl 321 installed in the middle of the bottom frame, a main magnetic steel 322 arranged in the middle of the magnetic bowl 321, four auxiliary magnetic steels 323 arranged on the magnetic bowl 321 and arranged around the main magnetic steel 322, and attached The main pole core 324 on the side of the main magnetic steel 322 away from the magnetic bowl 321 and the secondary pole core 325 on the side of the auxiliary magnetic steel 323 away from the magnetic bowl 321 are arranged at intervals between the main magnetic steel 322 and the auxiliary magnetic steel 323. The ring 315 is movably sleeved outside the main magnet 322 . It can be understood that the number of secondary magnets 323 is not limited to four, for example, there are two secondary magnets 323 , and two secondary magnets 323 may be provided on two opposite sides of the main magnet 322 respectively.

As shown in FIG. 18 , in some other embodiments, the speaker box' includes a bottom case assembly 10' and a speaker unit 20', the bottom case assembly 10' has a receiving cavity 11', and the speaker unit 20' is at least partially housed in the receiving chamber 11'. The bottom case assembly 10' includes a metal bottom case 12' and a protective film 13', the metal bottom case 12' has the receiving cavity 11', and the protective film 13' is attached to the outer side of the metal bottom case 12' . By attaching the protective film 13' on the outer side of the metal bottom case 12', in the subsequent assembly process of the metal bottom case 12', the protective film 13' can effectively prevent the outer surface of the metal bottom case 12' from being scratched.

Optionally, the bottom case assembly 10' is integrally stamped and formed by a metal plate attached with a protective film. The manufacturing process is simple, and the protective film 13' can prevent the surface of the metal plate from being scratched during the stamping process.

Optionally, the protective film 13 ′ is any one of a PET (Polyethylene terephthalate, polyethylene terephthalate) film, a PE (polyethylene, polyethylene) film, and a PVC (Polyvinyl chloride, polyvinyl chloride) film .

Optionally, the protective film 13' includes at least a polymer layer that provides color display, and the color of the protective film 13' can be changed by changing the material of the polymer layer, so as to meet customer requirements for product color.

As shown in FIGS. 19-20 , an embodiment of the present application further provides a terminal device. The terminal device includes a casing 400 and the above-mentioned speaker box 100 . The casing 400 includes a casing body 200 and at least one antenna 300 . The casing body 200 encloses a receiving cavity 202 and has an opening 201 communicating with the receiving cavity 202. The antenna 300 is arranged on the housing body 200 and extends at least partially to the outer periphery of the opening 201; the speaker box 100 is arranged in the receiving cavity 202 and the bottom plate 14 passes through The opening 201 is exposed outside the receiving cavity 202 , and the critical area 12 for antenna signal interference is located on the side of the bottom plate 14 close to the antenna 300 .

Optionally, the antenna 300 adopts a laser direct molding technology (Laser Direct Structuring, LDS) is formed on the outer surface of the housing body 200 .

The provided terminal devices can be mobile phones, notebook computers, tablet computers, wearable devices, etc.

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

Claims

A speaker box for a terminal device with an antenna, characterized in that the speaker box includes a metal bottom case, a plastic part and a speaker unit, the metal bottom case has an accommodation cavity, and the speaker unit at least partially accommodates In the receiving cavity, the metal bottom case has an antenna signal interference critical area, the metal bottom case is set as a through hole at the antenna signal interference critical area, and the plastic part is embedded in the through hole.
The speaker box according to claim 1, wherein the plastic part is a plastic part made of LCP or PBT or PPS or PPO or PP or PET or PEN material.
The speaker box according to claim 1, wherein the plastic part is injection-molded on the metal bottom case.
The speaker box according to claim 1, wherein the through hole comprises a through hole portion and a tapered hole portion communicated with the through hole portion, the tapered hole portion communicates with the receiving cavity, and the The diameter of the tapered hole portion is larger than the diameter of the through hole portion, and the shape of the plastic part is adapted to the shape of the through hole.
The speaker box according to any one of claims 1 to 4, wherein the speaker unit comprises a vibration system, a magnetic circuit system for driving the vibration system to vibrate and sound, and a magnetic circuit system for the vibration system and the The basin frame installed by the magnetic circuit system, the basin frame is at least partially accommodated in the receiving cavity; the metal bottom case is provided with an assembly hole, and the outer side of the basin frame is formed with a socket embedded in the assembly hole. Raised.
The speaker box according to claim 5, wherein the basin frame is formed on the metal bottom shell by injection molding.
The speaker box according to claim 5, wherein the speaker box further comprises a ventilating spacer disposed inside the basin frame, the ventilating spacer and the top of the basin frame are enclosed to form a front cavity, The ventilating spacer, the metal bottom shell and the bottom of the basin frame are enclosed to form a rear cavity, and the vibration system and the magnetic circuit system are arranged in the front cavity.
The speaker box according to claim 7, wherein the metal bottom case is provided with a filling hole which communicates with the rear cavity, and the rear cavity is filled with sound-absorbing particles through the filling hole.
A terminal device, characterized by comprising a casing and the speaker box according to any one of claims 1 to 8, the casing comprising a casing body and at least one antenna, the casing body enclosing a receiving cavity and An opening communicated with the receiving cavity is opened, the antenna is arranged on the housing body and at least partially extends to the outer periphery of the opening; the metal bottom shell includes a bottom plate and a surrounding area of the bottom plate. A side plate, the speaker box is arranged in the receiving cavity, the bottom plate is exposed to the outside of the receiving cavity through the opening, and the antenna signal interference critical area is located on the side of the bottom plate close to the antenna.
The terminal device according to claim 9, wherein the antenna is formed on the outer surface of the housing body by using a laser direct forming technology.