CN111970589A

CN111970589A - Loudspeaker box and electronic equipment thereof

Info

Publication number: CN111970589A
Application number: CN202011051667.6A
Authority: CN
Inventors: 肖波
Original assignee: AAC Optoelectronic Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; AAC Optoelectronic Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2020-11-20
Also published as: WO2022067900A1

Abstract

The invention provides a loudspeaker box which comprises a shell, a plastic film and a loudspeaker single body, wherein the loudspeaker single body comprises a vibration system and a magnetic circuit system for driving the vibration system to vibrate and sound; the shell comprises a bottom shell and a basin frame used for mounting the vibration system and the magnetic circuit system, the bottom shell and the basin frame are jointly surrounded to form a containing cavity, the loudspeaker units are at least partially contained in the containing cavity, the bottom shell and/or the basin frame are made of metal materials, and the plastic film covers the outer surface of the shell. According to the loudspeaker box provided by the invention, the plastic film covers the outer surface of the shell, so that the influence of the shell on the performance of the antenna can be effectively reduced under the condition that the shell has better strength and heat dissipation effect.

Description

Loudspeaker box and electronic equipment thereof

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of acoustic design, in particular to a loudspeaker box.

[ background of the invention ]

With the rapid development of electronic information technology, people's requirements on speakers are not only limited to the playing of video and audio, but also have higher requirements on the sound quality and reliability of sound played by the speakers. The shell of the existing loudspeaker box is mostly made of plastics, the shell made of plastics is slow in heat dissipation and low in strength, and cannot meet the market demands. However, the metal housing has a performance impact on the antenna of the electronic device, limiting the application of the speaker box.

Therefore, it is necessary to provide a speaker, which effectively reduces the influence of the metal housing of the speaker on the antenna of the electronic device while ensuring the heat dissipation and performance.

[ summary of the invention ]

The invention aims to provide a loudspeaker box which can effectively reduce the influence on an antenna under the condition of better strength and heat dissipation effect.

The purpose of the invention is realized by adopting the following technical scheme:

according to a first aspect of the present application, the present application provides a speaker box, which includes a speaker unit, a housing, and a plastic film, wherein the speaker unit includes a vibration system, and a magnetic circuit system for driving the vibration system to vibrate and generate sound;

the shell comprises a bottom shell and a basin frame used for supplying the vibration system and the magnetic circuit system to be installed, the bottom shell and the basin frame are jointly surrounded to form a containing cavity, at least part of the loudspeaker monomer is contained in the containing cavity, the bottom shell and/or the basin frame are made of metal materials, and the plastic film covers the outer surface of the shell.

As a refinement, the plastic film is arranged on the outer surface of the housing by injection molding, embossing or coating.

As an improvement mode, the plastic film is made of LCP materials.

As an improvement mode, the bottom shell and/or the basin stand are made of stainless steel.

As an improved mode, the bottom shell comprises a bottom plate and a side plate arranged around the bottom plate, and the side plate is provided with an assembling hole;

the basin stand comprises a bulge embedded in the assembling hole.

As an improvement mode, the basin frame is formed on the bottom shell through injection molding.

As an improvement mode, the assembling hole comprises a through hole and a tapered hole communicated with the through hole, the tapered hole is arranged on one side, away from the accommodating cavity, of the through hole, the aperture of the tapered hole is larger than that of the through hole, and the shape of the protrusion is matched with that of the assembling hole.

As an improved mode, the loudspeaker box further comprises a breathable partition arranged in the shell, the breathable partition divides the accommodating cavity into a front cavity and a rear cavity, and the loudspeaker is arranged in the front cavity.

As an improvement mode, the bottom shell is provided with a filling hole communicated with the rear cavity, and the rear cavity is filled with sound absorption particles.

According to a second aspect of the present application, the present application further provides an electronic device, which includes a host, an antenna and the speaker box, where the antenna and the speaker box are both installed on the host.

Compared with the prior art, the plastic film covers the outer surface of the shell, so that the influence of the metal part of the shell on the performance of the antenna can be effectively reduced under the condition of maintaining the shell to have better strength and heat dissipation effect.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a speaker box according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the loudspeaker enclosure shown in FIG. 1;

fig. 3 is an exploded view of a speaker box according to another embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view of a portion of FIG. 4 at B;

FIG. 6 is a schematic view of a variant embodiment of the assembly holes;

FIG. 7 is a schematic view of another variant of the assembly holes;

fig. 8 is a schematic structural diagram of a speaker box according to another embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view taken at C-C of FIG. 8;

FIG. 10 is an exploded schematic view of the vibration system;

fig. 11 is an exploded view of the magnetic circuit system.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and embodiments.

It should be noted that all directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured 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.

The electronic device provided by the embodiment of the invention comprises a host, an antenna and a loudspeaker box, wherein the antenna and the loudspeaker box are both installed on the host.

As shown in fig. 1-2, the speaker box includes a housing 10, a plastic film 20 and a speaker unit 30, wherein the speaker unit 30 includes a vibration system 31 and a magnetic circuit system 32 for driving the vibration system 31 to vibrate and generate sound; the shell 10 comprises a bottom shell 12 and a basin frame 13 used for installing a vibration system 31 and a magnetic circuit system 32, the bottom shell 12 and the basin frame 13 are jointly surrounded to form a containing cavity 11, at least part of the loudspeaker unit 30 is contained in the containing cavity 11, the bottom shell 12 and the basin frame 13 are made of metal materials, or any one of the bottom shell 12 and the basin frame 13 is made of metal materials, and the plastic film 20 covers the outer surface of the shell 10. By covering the plastic film 20 on the outer surface of the housing 10, the influence of the housing 10 on the antenna performance can be effectively reduced while maintaining the good strength and heat dissipation effect of the housing 10.

Alternatively, the bottom case 12 is integrally press-molded from a stainless steel plate. Of course, the bottom case 12 may be integrally stamped and formed of other metals, such as aluminum alloy.

Alternatively, the tub frame 13 is integrally press-molded from a stainless steel plate. Of course, the frame 13 may be formed by integrally punching other metals, such as aluminum alloy.

Alternatively, the plastic film 20 is a plastic member made of LCP (Liquid Crystal Polymer) material. The plastic part 20 made of LCP material has a higher thermal conductivity, a lower dielectric constant and a lower dielectric loss, and can effectively reduce the influence of the housing 10 on the antenna performance while maintaining the high strength of the housing 10 and the good heat dissipation effect.

It is understood that the plastic film 20 may also be made of other materials with higher thermal conductivity and lower dielectric constant and lower dielectric loss, such as PBT (Polybutylene terephthalate) or PPS (PPS plastic material) or PPO (Polyphenylene Oxide) or PP (polypropylene) or PET (Polyethylene terephthalate) or PEN (Polyethylene naphthalate).

Alternatively, the plastic film 20 is formed on the housing 10 by injection molding or coating.

As shown in fig. 3 to 5, in some embodiments, the basin stand 13 is at least partially received in the receiving cavity 11, the bottom shell 12 includes a bottom shell 121 and a side plate 122 surrounding the bottom shell, the side plate 122 is provided with a fitting hole 123, and a protrusion 131 embedded in the fitting hole 123 is formed on an outer side surface of the basin stand 13. In this embodiment, after injection molding, the tub 13 and the bottom case 12 can be stably coupled by the engagement of the protrusions 131 with the fitting holes 123.

Optionally, the frame 13 is made of a plastic material.

In some embodiments, the tub 13 is injection molded to the bottom case 12.

In some embodiments, the fitting hole 123 includes a through hole portion 1231 and a taper hole portion 1232 communicating with the through hole portion 1231, the taper hole portion 1232 is provided on a side of the through hole portion 1231 away from the accommodating chamber 11, an aperture of the taper hole portion 1232 is larger than an aperture of the through hole, and a shape of the protrusion 131 is adapted to a shape of the fitting hole 123. With this embodiment, through setting up the pilot hole 123 and including taper hole portion 1232, the back of moulding plastics, can form the back-off structure between fashioned arch 131 of basin frame 13 lateral surface and the drain pan 12, has increased the adhesive strength of basin frame 13 and drain pan 12 for basin frame 13 can connect firmly on drain pan 12.

Illustrated in fig. 6 is another modified embodiment of the fitting hole 123, in which the fitting hole 123a includes a first through-hole portion 123a1 and a second through-hole portion 123a2 communicating with the first through-hole portion 123a1, the second through-hole portion 123a2 is provided on a side of the first through-hole portion 123a1 away from the accommodation chamber 11, an aperture of the second through-hole portion 123a2 is larger than an aperture of the first through-hole portion 123a1, and a shape of the protrusion is adapted to a shape of the fitting hole. In a similar way, in this embodiment, after injection molding, the inverted buckle structure can be formed between the convex 131 formed on the outer side surface of the basin stand 13 and the bottom case 12, so that the bonding strength between the basin stand 13 and the bottom case 12 is increased, and the basin stand 13 can be stably connected to the bottom case 12.

Illustrated in fig. 7 is another modified embodiment of the fitting hole, in which the fitting hole 123b is a tapered hole, and the farther the fitting hole 123b is from the accommodating chamber 11, the larger the aperture of the fitting hole 123b, and the shape of the protrusion matches the shape of the fitting hole. In a similar way, in this embodiment, after injection molding, the inverted buckle structure can be formed between the convex 131 formed on the outer side surface of the basin stand 13 and the bottom case 12, so that the bonding strength between the basin stand 13 and the bottom case 12 is increased, and the basin stand 13 can be stably connected to the bottom case 12.

It can be understood that the assembling holes are not limited to the setting manner of 123, 123a and 123b, as long as one side of the assembling holes away from the accommodating cavity 11 has a larger aperture, so that the basin stand 13 after injection molding can be firmly connected to the bottom case 12 through the inverted structure formed by the protrusions and the assembling holes.

As shown in fig. 3, 8-11, in some embodiments, the speaker box further includes an air-permeable partition 40 mounted on the frame 13, the frame 13 includes a step portion 132 disposed on an inner wall of the frame 13, a bottom portion of the air-permeable partition 40 is abutted and fixed on the step portion 132, the air-permeable partition 40 divides the accommodating chamber 11 into a front chamber 11a and a rear chamber 11b, and the vibration system 31 and the magnetic circuit system 32 are disposed in the front chamber 11 a.

In some embodiments, the bottom case 12 of the housing 10 is provided with a filling hole 15 communicating with the rear cavity 11b, the plastic film 20 is provided with an opening matched with the size and position of the filling hole 15, so that the rear cavity 11b can communicate with an external space through the filling hole 15, when the lower sound film 311 and the annular vibration film 313 vibrate up and down to generate sound, the lower sound film 311 and the annular vibration film 313 compress the space of the rear cavity 11b, air in the rear cavity 11b can be smoothly discharged from the outward-expanding filling hole 15, so that air can be uniformly exchanged between the rear cavity 11b and the external space, and an effect of balancing air pressure is achieved. The air permeable partition 40 is used to prevent the sound-absorbing particles filled in the rear cavity 11b from entering the rear cavity 11b to affect the performance thereof, the air permeable partition 40 may be a breathable film, a mesh fabric, etc., and the sound-absorbing particles are preferably zeolite particles.

In some embodiments, the frame 13 includes two sub-frames 13a disposed at intervals, and the two sub-frames 13a are respectively formed on two opposite sides of the housing 10, so that the occupied space of the frame 13 can be reduced, and the speaker box has a larger rear cavity 11b, thereby obtaining a better sound effect. Of course, it is also possible to provide the frame 13 as a complete ring structure.

Illustratively, the step portion 132 includes first steps 132a respectively disposed on opposite sides of the two sub-frames 13a, opposite sides of the air-permeable partition 40 respectively overlap the first steps 132a of the two sub-frames 13a, and the magnetic circuit system 32 is mounted on the air-permeable partition 40.

Optionally, the vibration system 31 includes a lower voice diaphragm 311, an annular support 312, an annular diaphragm 313, a voice coil bobbin 314, a voice coil 315, and a dome 316. Illustratively, two lower sound films 311 are provided, the two lower sound films 311 are respectively located at two opposite sides of the magnetic circuit system 32, the outer side of the lower sound film 311 is clamped between the frame 13 and the annular support 312, the stepped portion 132 further includes a second step 132b, the lower surface of the outer side of the lower sound film 311 is lapped on the second step 132b, the annular support 312 is attached to the upper surface of the outer side of the lower sound film 311, and the annular support 312 and the frame 13 clamp the outer side of the lower sound film 311 from the upper surface and the lower surface. The outer side of the ring-shaped diaphragm 313 is connected to the ring-shaped support 312. The voice coil bobbin 314 is connected to the inner side of the lower diaphragm 311 and the inner side of the ring-shaped diaphragm 313. The voice coil 315 is connected to the voice coil bobbin 314, and the voice coil 315 is driven by the magnetic circuit system 32 to vibrate up and down, so as to drive the lower voice diaphragm 311 and the annular diaphragm 313 to vibrate up and down to generate sound. The dome 316 is provided on the inner side of the ring-shaped diaphragm 313 and is mounted to the voice coil bobbin 314.

In some embodiments, the voice coil bobbin 314 includes a bobbin body 3141 and a supporting frame 3142, the bobbin body 3141 is annular, an upper surface of the bobbin body 3141 is connected to the annular diaphragm 313, a lower surface of the bobbin body 3141 is connected to the voice coil 315 and an inner side of the lower diaphragm 311, and the supporting frame 3142 is mounted on the inner side of the bobbin body 3141.

In some embodiments, the vibration system 31 further includes two elastic supporting members 317 respectively disposed on two opposite sides of the voice coil 315, the elastic supporting members 317 include an elastic supporting member body 3171 connected to the frame 13 and an elastic arm 3172 extending from the elastic supporting member body 3171 toward the voice coil 315, and an end of the elastic arm 3172 away from the elastic supporting member body 3171 is sandwiched between the lower diaphragm 311 and the bobbin body 3141. Preferably, the elastic support 317 is a flexible circuit board, and may serve to electrically connect the voice coil 315 and an external power source, in addition to functioning as an elastic support for the voice coil 315.

The magnetic circuit system 32 includes a magnetic bowl 321 installed in the middle of the bottom frame, a main magnetic steel 322 installed in the middle of the magnetic bowl 321, four auxiliary magnetic steels 323 installed on the magnetic bowl 321 and surrounding the main magnetic steel 322, a main pole core 324 attached to one side of the main magnetic steel 322 far away from the magnetic bowl 321, and an auxiliary pole core 325 installed on one side of the auxiliary magnetic steel 323 far away from the magnetic bowl 321, the main magnetic steel 322 and the auxiliary magnetic steel 323 are arranged at intervals, and the voice coil 315 is movably sleeved outside the main magnetic steel 322. It is understood that the number of the sub magnetic steels 323 is not limited to four, for example, two sub magnetic steels 323 are provided, and two sub magnetic steels 323 may be provided on two opposite sides of the main magnetic steel 322.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A loudspeaker box is characterized by comprising a loudspeaker single body, a shell and a plastic film, wherein the loudspeaker single body comprises a vibration system and a magnetic circuit system for driving the vibration system to vibrate and sound;

2. A loudspeaker enclosure as claimed in claim 1, wherein: the plastic film is arranged on the outer surface of the shell in an injection molding, die pressing or coating mode.

3. A loudspeaker enclosure as claimed in claim 1, wherein: the plastic film is made of LCP materials.

4. A loudspeaker enclosure as claimed in claim 1, wherein: the bottom shell and/or the basin stand are made of stainless steel.

5. A loudspeaker enclosure according to any one of claims 1-4, wherein: the bottom shell comprises a bottom plate and a side plate arranged around the bottom plate in a surrounding mode, and the side plate is provided with an assembling hole;

the basin stand comprises a bulge embedded in the assembling hole.

6. A loudspeaker enclosure as claimed in claim 5, wherein: the basin frame is formed on the bottom shell through injection molding.

7. A loudspeaker enclosure as claimed in claim 6, wherein: the assembling hole comprises a straight-through hole and a tapered hole communicated with the straight-through hole, the tapered hole is arranged on one side, far away from the accommodating cavity, of the straight-through hole, the aperture of the tapered hole is larger than that of the straight-through hole, and the shape of the bulge is matched with that of the assembling hole.

8. A loudspeaker enclosure according to any one of claims 1-4, wherein: the loudspeaker box further comprises a breathable partition arranged in the shell, the breathable partition divides the containing cavity into a front cavity and a rear cavity, and the loudspeaker is arranged in the front cavity.

9. A loudspeaker enclosure as claimed in claim 8, wherein: the bottom shell is provided with a filling hole communicated with the rear cavity, and the rear cavity is filled with sound-absorbing particles.

10. An electronic device comprising a host, an antenna, and the loudspeaker enclosure of any one of claims 1-9, the antenna and the loudspeaker enclosure both mounted to the host.