CN211744719U

CN211744719U - Sound production device

Info

Publication number: CN211744719U
Application number: CN202020265051.8U
Authority: CN
Inventors: 肖波; 令狐荣林; 章统
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-10-23
Anticipated expiration: 2030-03-05
Also published as: WO2021174577A1

Abstract

The utility model provides a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein a leakage hole is arranged on the basin frame in a penetrating way, the vibration system comprises an upper vibration film, a lower vibration film and an upper voice coil, lower voice coil loudspeaker voice coil and the skeleton of connecting lower voice coil loudspeaker voice coil and lower vibrating diaphragm, go up the vibrating diaphragm, lower vibrating diaphragm and basin frame enclose to close and form accommodating space, magnetic circuit accepts in accommodating space, magnetic circuit includes the fixing in the splint of basin frame and sets firmly first magnetism portion on the splint, second magnetism portion and third magnetism portion, second magnetism portion sets up with first magnetism portion interval and forms the interior magnetic gap, third magnetism portion lies in second magnetism portion and keeps away from first magnetism portion one side and sets up with second magnetism portion interval and form the outer magnetic gap, third magnetism portion has the leakage channel who feeds through outer magnetic gap and leak hole, go up in the voice coil loudspeaker voice coil inserts the interior magnetic gap, lower voice coil loudspeaker voice coil inserts in the outer magnetic gap, run through on the splint and be equipped with dodge the hole of dodging of skeleton. Compared with the prior art, the utility model discloses a two sound production faces of vocal device can vibrate the sound production alone.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric field especially relates to an apply to vocal device 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 mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.

The sound production device in the related art comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil used for driving an upper vibrating diaphragm and a lower vibrating diaphragm to vibrate and produce sound. However, such a sound-generating device does not meet the requirements of special occasions requiring double-sided sound generation.

Therefore, there is a need to provide a new sound generation device to solve the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a sounding device to solve the problem that sounding device among the correlation technique can't satisfy two-sided sound production demand.

In order to achieve the above object, the present invention provides a sound production device, comprising a frame, a vibration system fixed on the frame and a magnetic circuit system for driving the vibration system to produce sound, wherein the frame is provided with a leakage hole, the vibration system comprises an upper vibration film and a lower vibration film fixed on opposite sides of the frame, a voice coil for driving the upper vibration film to produce sound, a lower voice coil for driving the lower vibration film to produce sound, and a framework connected to the lower voice coil and the lower vibration film, the upper vibration film, the lower vibration film and the frame are enclosed to form an accommodation space, the magnetic circuit system is accommodated in the accommodation space, the magnetic circuit system comprises a clamp plate fixed on the frame and a first magnetic part, a second magnetic part and a third magnetic part fixed on one side of the clamp plate facing the upper vibration film, the second magnetic part and the first magnetic part are separated to form an inner magnetic gap, the third magnetic part is positioned on one side, far away from the first magnetic part, of the second magnetic part and is arranged at an interval with the second magnetic part to form an outer magnetic gap, the third magnetic part is provided with a leakage channel communicated with the outer magnetic gap and the leakage hole, the upper voice coil is inserted into the inner magnetic gap, the lower voice coil is inserted into the outer magnetic gap, and the position, facing the outer magnetic gap, of the clamping plate is provided with an avoiding hole for avoiding the framework in a penetrating mode.

Preferably, the skeleton include with the main part that lower vibrating diaphragm is connected reaches certainly the main part to splint extend and form and pass a plurality of connecting portion of dodging the hole, connecting portion with lower voice coil loudspeaker voice coil is connected.

Preferably, lower voice coil loudspeaker voice coil is fillet rectangle structure, connecting portion are equipped with four, and four connecting portion one-to-one connect in four fillets of lower voice coil loudspeaker voice coil.

Preferably, the vibration system further includes an upper dome and a lower dome disposed in the accommodating space, the upper dome is connected to the upper diaphragm and the upper voice coil along opposite sides in the vibration direction, and the lower dome is connected to the main body portion and the lower diaphragm along opposite sides in the vibration direction.

Preferably, the third magnetic part is composed of a plurality of third permanent magnets arranged around the second magnetic part, and two adjacent third permanent magnets are arranged at intervals, wherein two adjacent third permanent magnets are arranged at intervals to form the leakage channel.

Preferably, the second magnetic part is a second permanent magnet, and the second permanent magnet is in a continuous annular structure.

Preferably, first magnetism portion is kept away from first utmost point core has set firmly on one side of splint, second magnetism portion is kept away from second utmost point core has set firmly on one side of splint, third magnetism portion is kept away from third utmost point core has set firmly on one side of splint, splint are the splint that soft magnetic material made.

Preferably, a first concave portion is formed in a position, facing the leakage passage, of the clamping plate in a concave manner, a second concave portion is formed in a position, facing the leakage passage, of the third pole core in a concave manner, and an opening of the first concave portion and an opening of the second concave portion face the leakage passage.

Preferably, the sounder further comprises an upper end cover and a lower end cover, the upper vibrating diaphragm clamp is arranged between the basin frame and the upper end cover, the upper end cover is provided with a first sounding hole for the outward sounding of the upper vibrating diaphragm, the lower vibrating diaphragm clamp is arranged between the basin frame and the lower end cover, and the lower end cover is provided with a second sounding hole for the outward sounding of the lower vibrating diaphragm.

Compared with the prior art, the sound production device of the utility model drives the upper vibrating diaphragm and the lower vibrating diaphragm to produce sound through the upper voice coil and the lower voice coil respectively, so that the sound production device can produce sound on two sides, and the upper vibrating diaphragm and the lower vibrating diaphragm can work independently; meanwhile, the upper voice coil and the lower voice coil are respectively inserted into the inner magnetic gap and the outer magnetic gap of the magnetic circuit system, so that the upper vibrating diaphragm and the lower vibrating diaphragm share the same magnetic circuit system, and the utilization rate of a magnetic circuit is improved. In addition, the magnetic circuit system is provided with the inner magnetic gap, the outer magnetic gap, the avoiding hole and the leakage channel, so that when the upper vibrating diaphragm or/and the lower vibrating diaphragm vibrates, air flow in the accommodating space can circulate with the outside through the leakage hole.

[ 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 a perspective view of a preferred embodiment of the sound production device of the present invention;

FIG. 2 is an exploded view of the sound device of FIG. 1;

FIG. 3 is a cross-sectional view of the sound device of FIG. 1 taken along the direction A-A;

FIG. 4 is a cross-sectional view of the sound device of FIG. 1 taken along the direction B-B;

FIG. 5 is a schematic structural view of the sound device according to the present invention after assembling the partial structure;

FIG. 6 is a schematic view of the structure of FIG. 5 with the clamping plates partially removed;

fig. 7 is a schematic structural view of the assembled vibration system of the sound generating device according to the present invention;

fig. 8 is a schematic structural view of the sound device of the present invention after the clamping plate and the frame are assembled.

[ 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 8, the sound generating device 100 has two sound generating surfaces, and is suitable for electronic devices with two-sided sound generating requirements, such as a two-sided mobile phone. The sounding device 100 comprises a basin frame 1, a vibration system 3 fixed on the basin frame 1, and a magnetic circuit system 5 for driving the vibration system 3 to vibrate and sound.

The basin stand 1 is provided with a leakage hole 1A in a penetrating way. As shown in fig. 1, 2 and 3, the frame 1 has a rectangular structure, and includes a pair of first side walls 11 disposed opposite to each other and a second side wall 13 connecting the pair of first side walls 11. The pair of first side walls 11 are provided with the leakage holes 1A, and the two leakage holes 1A are symmetrically distributed relative to a section plane in the B-B direction.

The magnetic circuit system 5 includes a clamp plate 51 fixed to the frame 1, and a first magnetic part 52, a second magnetic part 53, and a third magnetic part 54 fixed to a side of the clamp plate 51 facing the upper diaphragm 31, where the second magnetic part 53 and the first magnetic part 52 are arranged at an interval to form an inner magnetic gap 5A, the third magnetic part 54 is located on a side of the second magnetic part 53 away from the first magnetic part 52 and is arranged at an interval with the second magnetic part 53 to form an outer magnetic gap 5B, the third magnetic part 54 has a leakage channel 54A communicating the outer magnetic gap 5B and the leakage hole 1A, an avoiding hole 511 penetrates through a position of the clamp plate 51 facing the outer magnetic gap 5B, and the avoiding hole 511 is used for avoiding the frame 36.

In the present embodiment, the first magnetic part 52 is a first permanent magnet. It is understood that, in other embodiments, the first magnetic part 52 may also be formed by two, three, etc. first permanent magnets which are stacked along the vibration direction X, and a pole core may also be interposed between two adjacent first permanent magnets.

In this embodiment, the second magnetic part 53 is a second permanent magnet, and the second permanent magnet has a continuous ring structure. It is understood that, in other embodiments, the second magnetic part 53 may also be configured to be composed of a plurality of second permanent magnets surrounding the first magnetic part, and two adjacent second permanent magnets are disposed at intervals; alternatively, the second magnetic part 53 may be formed by superimposing two, three, or other continuous second permanent magnets in a ring structure along the vibration direction X, and a pole core may be interposed between two adjacent second permanent magnets.

In this embodiment, the third magnetic part 54 is formed by a plurality of third permanent magnets surrounding the second magnetic part 53, and two adjacent third permanent magnets are spaced apart from each other. Wherein, two of the third permanent magnets adjacent to the leakage hole 1A are disposed at an interval to form the leakage passage 54A. It is understood that, in other embodiments, the third magnetic part 54 may also be a second permanent magnet in an annular structure, and accordingly, a leakage path communicating the external magnetic gap and the leakage hole needs to be opened at a position of the second permanent magnet corresponding to the leakage hole.

The first permanent magnet, the second permanent magnet and the third permanent magnet are usually magnetic steels. It is to be understood that the first permanent magnet, the second permanent magnet, and the third permanent magnet may be natural magnets.

As shown in fig. 2, 3 and 4, a first pole core 55 is fixedly disposed on a side of the first magnetic portion 52 away from the clamping plate 51, a second pole core 56 is fixedly disposed on a side of the second magnetic portion 53 away from the clamping plate 51, a third pole core 57 is fixedly disposed on a side of the third magnetic portion 54 away from the clamping plate 51, and the clamping plate 51 is made of a soft magnetic material. Through the magnetic conduction effect of the first pole piece 55, the second pole piece 56, the third pole piece 57 and the clamping plate 51, the magnetic flux in the inner magnetic gap 5A and the magnetic flux in the outer magnetic gap 5B can be effectively increased, so that the acoustic performance of the sound production device 100 can be improved, and the sound production device 100 is also favorable for light and thin design.

In this embodiment, the first pole piece 55, the second pole piece 56, and the third pole piece 57 are located in the same horizontal plane.

In this embodiment, a first recess 513 is recessed at a position where the clamping plate 51 faces the leakage passage 54A, a second recess 571 is recessed at a position where the third pole core 57 faces the leakage passage 54A, and an opening of the first recess 513 and an opening of the second recess 571 face the leakage passage 54A. The provision of the first recess 513 and the second recess 571 may increase the volume of the passage communicating the outer magnetic gap 5B and the leak hole 1A.

Vibration system 3 includes vibrating diaphragm 31, lower vibrating diaphragm 33, goes up voice coil 34, lower voice coil 35 and skeleton 36, go up vibrating diaphragm 31 with lower vibrating diaphragm 33 is fixed in respectively the relative both sides of basin frame 1, just go up vibrating diaphragm 31 lower vibrating diaphragm 33 reaches basin frame 1 encloses to close and forms accommodating space 100A, magnetic circuit 5 accept in accommodating space 100A, go up voice coil 34 drive go up vibrating diaphragm 31 vibration sound production, lower voice coil 35 drive lower vibrating diaphragm 33 vibration sound production, skeleton 36 is connected lower voice coil 35 with lower vibrating diaphragm 33. The upper voice coil 34 is inserted into the inner magnetic gap 5A, the lower voice coil 35 is inserted into the outer magnetic gap 5B, and the avoiding hole 511 of the clip plate 51 avoids the bobbin 36. Wherein, the upper voice coil 34 and the lower voice coil 35 are connected to an external power supply through a flexible circuit board (not shown), and after the upper voice coil 34 is powered on, the upper diaphragm 31 vibrates together with the upper voice coil 34 under the magnetic force of the magnetic circuit system 5; after the lower voice coil 35 is powered on, the lower diaphragm 33 and the bobbin 36 vibrate together with the lower voice coil 35 under the magnetic force of the magnetic circuit system 5. The upper vibrating diaphragm 31 and the lower vibrating diaphragm 33 are driven to sound through the upper voice coil 34 and the lower voice coil 35 respectively, so that the sound production device can produce sound on two sides, and the upper vibrating diaphragm 31 and the lower vibrating diaphragm 33 can work independently; and because the upper voice coil 34 and the lower voice coil 35 are respectively inserted into the inner magnetic gap 5A and the outer magnetic gap 5B of the magnetic circuit system 5, the upper diaphragm 31 and the lower diaphragm 33 share the same magnetic circuit system, and the utilization rate of the magnetic circuit is improved. Meanwhile, since the magnetic circuit system 5 has the inner magnetic gap 5A, the outer magnetic gap 5B, the avoiding hole 511, and the leakage channel 54A, when the upper diaphragm 31 or/and the lower diaphragm 33 vibrate, the airflow in the accommodating space 100A can flow through the leakage hole 1A to the outside.

The bobbin 36 includes a main body portion 361 connected to the lower diaphragm 33 and a plurality of connection portions 363 extending from the main body portion 361 to the clamping plate 51 and passing through the avoiding hole 511, and the connection portions 363 are connected to the lower voice coil 35. The framework 36 is provided with a plurality of connecting parts 363, so that the clamping plate 51 can be avoided to a greater extent, and the clamping plate 51 can be designed to utilize a more sufficient magnetic conduction effect to improve the magnetic flux of the outer magnetic gap 5B, thereby improving the vibration performance of the lower diaphragm 33.

As shown in fig. 2, 3 and 4, the main body 361 has a flat plate shape. The main body 361 having a flat plate shape may enhance the connection strength between the frame 36 and the lower diaphragm 33. It is to be understood that the body 361 embodiment is not so limited; for example, in other embodiments, the main body 361 may be provided in a continuous ring structure.

As shown in fig. 2 and 7, the upper voice coil 34 and the lower voice coil 35 are in a rounded rectangular structure, four connection portions 363 are provided, and the four connection portions 363 are connected to four rounded corners of the lower voice coil 35 in a one-to-one correspondence manner. Wherein the flexible circuit boards are electrically soldered to the rounded positions of the upper voice coil 34 and the lower voice coil 35, respectively.

In order to enhance the vibration effect of the upper diaphragm 31 and the lower diaphragm 35 to improve the acoustic performance of the sound production device 100. In this embodiment, the vibration system 3 further includes an upper dome 37 and a lower dome 38 disposed in the accommodating space 100A, two opposite sides of the upper dome 37 along the vibration direction X are respectively connected to the upper diaphragm 31 and the upper voice coil 34, and two opposite sides of the lower dome 38 along the vibration direction X are respectively connected to the main body 361 and the lower diaphragm 33. It is understood that, in other embodiments, the upper dome 37 and the lower dome 38 may also be disposed outside the receiving space 100A, and two opposite sides of the upper diaphragm 31 along the vibration direction X are respectively connected to the upper voice coil 34 and the upper dome 37, and two opposite sides of the lower diaphragm 33 along the vibration direction X are respectively connected to the lower dome 38 and the main body portion 361.

As shown in fig. 2, fig. 3 and fig. 4, the sound generating device 100 further includes an upper end cover 7 and a lower end cover 9, the upper diaphragm 31 is clamped between the basin frame 1 and the upper end cover 7, the upper end cover 7 has a first sound emitting hole 71 for the upper diaphragm 31 to emit sound outwards, the lower diaphragm 33 is clamped between the basin frame 1 and the lower end cover 9, and the lower end cover 9 has a second sound emitting hole 91 for the lower diaphragm 33 to emit sound outwards. The upper end cover 7 and the lower end cover 9 are arranged, so that the upper vibrating diaphragm 31 and the lower vibrating diaphragm 33 can be better fixed on the frame 1.

Compared with the prior art, the sound production device of the utility model drives the upper vibrating diaphragm 31 and the lower vibrating diaphragm 33 to produce sound through the upper voice coil 34 and the lower voice coil 35 respectively, so that the sound production device can produce sound on two sides, and the upper vibrating diaphragm 31 and the lower vibrating diaphragm 33 can work independently; meanwhile, the upper voice coil 34 and the lower voice coil 35 are respectively inserted into the inner magnetic gap 5A and the outer magnetic gap 5B of the magnetic circuit system 5, so that the upper diaphragm 31 and the lower diaphragm 33 share the same magnetic circuit system, thereby improving the utilization rate of the magnetic circuit. In addition, by configuring the magnetic circuit system 5 to have the inner magnetic gap 5A, the outer magnetic gap 5B, the avoiding hole 511 and the leakage channel 54A, when the upper diaphragm 31 or/and the lower diaphragm 33 vibrates, the air flow in the accommodating space 100A can flow through the leakage hole 1A to the outside.

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 sound production device comprises a basin frame, a vibration system and a magnetic circuit, wherein the vibration system is fixedly arranged on the basin frame, the magnetic circuit drives the vibration system to vibrate and produce sound, the vibration system comprises an upper vibration film and a lower vibration film which are respectively fixed on two opposite sides of the basin frame, an upper voice coil for driving the upper vibration film to vibrate and produce sound, a lower voice coil for driving the lower vibration film to vibrate and produce sound, and a framework for connecting the lower voice coil and the lower vibration film, the upper vibration film, the lower vibration film and the basin frame are enclosed to form an accommodating space, the magnetic circuit is accommodated in the accommodating space, the magnetic circuit comprises a clamp plate fixedly arranged on the basin frame and a first magnetic part, a second magnetic part and a third magnetic part which are fixedly arranged on one side of the clamp plate facing the upper vibration film, the second magnetic part and the first magnetic part are arranged at intervals to form an inner magnetic gap, the third magnetic part is positioned on one side, far away from the first magnetic part, of the second magnetic part and is arranged at an interval with the second magnetic part to form an outer magnetic gap, the third magnetic part is provided with a leakage channel communicated with the outer magnetic gap and the leakage hole, the upper voice coil is inserted into the inner magnetic gap, the lower voice coil is inserted into the outer magnetic gap, and the position, facing the outer magnetic gap, of the clamping plate is provided with an avoiding hole for avoiding the framework in a penetrating mode.

2. The sounding device according to claim 1, wherein the bobbin comprises a main body portion connected to the lower diaphragm and a plurality of connecting portions extending from the main body portion to the clamping plate and passing through the avoiding hole, and the connecting portions are connected to the lower voice coil.

3. The sounding device according to claim 2, wherein the lower voice coil is a rounded rectangle, the number of the connecting portions is four, and four connecting portions are connected to four rounded corners of the lower voice coil in a one-to-one correspondence manner.

4. The sounding device according to claim 2, wherein the vibration system further comprises an upper dome and a lower dome disposed in the receiving space, the upper dome is connected to the upper diaphragm and the upper voice coil along two opposite sides in the vibration direction, and the lower dome is connected to the main body and the lower diaphragm along two opposite sides in the vibration direction.

5. The sounder device according to claim 1, wherein the third magnetic portion comprises a plurality of third permanent magnets disposed around the second magnetic portion, and two adjacent third permanent magnets are spaced apart, wherein two adjacent third permanent magnets are spaced apart to form the leakage path.

6. The sounder device according to claim 1 or 5, wherein the second magnetic portion is a second permanent magnet, the second permanent magnet being in the form of a continuous ring structure.

7. The sound production device according to claim 1 or 5, wherein a first pole core is fixedly arranged on one side of the first magnetic part away from the clamping plate, a second pole core is fixedly arranged on one side of the second magnetic part away from the clamping plate, a third pole core is fixedly arranged on one side of the third magnetic part away from the clamping plate, and the clamping plate is made of soft magnetic material.

8. The sounder device according to claim 7, wherein a first recess is formed by recessing a position of the clamp plate facing the leak passage, a second recess is formed by recessing a position of the third pole core facing the leak passage, and an opening of the first recess and an opening of the second recess face the leak passage.

9. The sound production device according to claim 1, further comprising an upper end cover and a lower end cover, wherein the upper diaphragm clamp is arranged between the basin frame and the upper end cover, the upper end cover is provided with a first sound emitting hole for the upper diaphragm to emit sound outwards, the lower diaphragm clamp is arranged between the basin frame and the lower end cover, and the lower end cover is provided with a second sound emitting hole for the lower diaphragm to emit sound outwards.