CN115086840A

CN115086840A - Sound production device

Info

Publication number: CN115086840A
Application number: CN202110274748.0A
Authority: CN
Inventors: 姚璐鹏; 贺真; 戴娜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-09-20
Also published as: WO2022194043A1

Abstract

The embodiment of the application provides a sound production device. This sound generating mechanism includes: a housing, a partial area of which includes a first sound emitting part; the second sound-producing component is positioned in the device and is opposite to the first sound-producing component; the first sound-emitting part or the second sound-emitting part includes a vibration plate; the first sounding part and the second sounding part are used for mutually matching to drive the vibrating plate to vibrate to generate sound. The embodiment of the application provides a sound generating mechanism, be used for the vibration pronunciation with partly as the sound generating component of shell, reduced the complexity of device inner structure. Therefore, compare with traditional technical scheme, the sound generating mechanism of this application embodiment is under the same tone quality, and volume and thickness are littleer, and under the same volume and thickness, tone quality is better.

Description

Sound production device

Technical Field

The application relates to the technical field of terminals, in particular to a sound production device.

Background

With the popularization of the mobile internet technology, portable terminal devices such as mobile phones and tablet computers have become important carriers for users to perform daily entertainment activities such as voice video playing, audio playing, game competition and the like at present due to the characteristics of small size, thin thickness, convenience in carrying and the like.

When a user uses a terminal device, the sound quality of a loudspeaker is an important index influencing the user experience. The sound quality of a loudspeaker can be influenced by factors such as the effective radiating area of the loudspeaker, the stroke (physical vibration boundary of the diaphragm) and the volume of the sound cavity. Generally, increasing the size of the speaker is beneficial to increasing the effective radiation area, increasing the stroke, increasing the volume of the sound cavity and improving the sound quality.

However, since portable terminal devices such as mobile phones and tablet computers are small in size and thin in thickness, it is difficult to prevent a large-sized speaker in the body of the portable terminal devices, and with the increase in complexity of the terminal devices, there are more and more parts in the body, so that the size of the speaker tends to be further reduced, so that the sound quality of the speaker is difficult to improve, and especially, the reduction in the size of the speaker causes poor low-frequency sensitivity of the speaker, which affects the low-frequency performance of the speaker.

Disclosure of Invention

The embodiment of the application provides a sound generating device to under the condition of the thickness and the volume that do not increase sound generating device, improve sound generating device's tone quality.

In a first aspect, an embodiment of the present application provides a sound generating apparatus: the method comprises the following steps: a housing, a partial area of which includes a first sound emitting part; the second sound-producing component is positioned in the device and is opposite to the first sound-producing component; the first sound-emitting part or the second sound-emitting part includes a vibration plate; the first sounding part and the second sounding part are used for mutually matching to drive the vibrating plate to vibrate to generate sound. The sound production device that this application embodiment provided is used for the vibration pronunciation with partly as the vocal part of shell, has reduced the complexity of device inner structure. Therefore, compare with traditional technical scheme, the sound generating mechanism of this application embodiment is under the same tone quality, and volume and thickness are littleer, and under the same volume and thickness, tone quality is better.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first sound-emitting component includes a vibration plate, and the vibration plate is connected to the housing through a flexible connection component. Thus, the vibrating plate can be movably connected with the shell through the flexible connecting part, and not only can vibrate and sound, but also can be used as a part of the shell to protect devices in the device.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the sound-generating device does not need to generate sound, the vibrating piece and the housing are located on the same plane. Therefore, when the vibrating plate does not need to vibrate to produce sound, the vibrating plate and the shell have high integrity, and the attractiveness of the equipment can be improved.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, when the sound generating device does not need to generate sound, the first sound generating component and the second sound generating component are attached to each other; when the sounding device needs to sound, the first sounding part and the second sounding part are matched with each other to generate repulsion force, so that the vibrating plate is pushed to a first position, and the first position is located outside a plane where the shell is located; during sounding of the sounding device, the vibrating plate is used for vibrating at the first position. Because the first position is positioned outside the plane of the shell, in the sounding process of the sounding device, the vibrating plate can realize larger amplitude and has better low-frequency performance.

With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the vibrating reed is located outside a plane where the housing is located, and a gap is formed between the first sounding part and the second sounding part. Therefore, in the sounding process of the sounding device, the vibrating plate can realize larger amplitude and has better low-frequency performance; and when the sounding device needs to sound, the vibrating piece can directly start to vibrate and sound, and the vibrating piece does not need to be pushed out first, so that the response is faster.

With reference to the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the first sounding part includes a permanent magnet, and the permanent magnet is disposed on a side of the vibrating reed facing the second sounding part; the second sounding part comprises an electromagnet, and the electromagnet and the permanent magnet are arranged oppositely. Therefore, the permanent magnet is connected with the vibrating plate, and when the sound production device needs to produce sound, the permanent magnet can be driven to drive the vibrating plate to produce vibration and produce sound only by applying changed current in the electromagnet.

With reference to the first to fourth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the first sounding part includes an electromagnet, and the electromagnet is disposed on a side of the vibrating reed facing the second sounding part; the second sounding part comprises a permanent magnet, and the permanent magnet and the electromagnet are arranged oppositely. Therefore, the electromagnet is connected with the vibrating plate, and when the sounding device needs to sound, the electromagnet can be driven to drive the vibrating plate to vibrate to sound only by applying variable current in the electromagnet.

With reference to the first to fourth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the first sound-emitting component includes a first electromagnet, and the first electromagnet is disposed on a side of the vibration plate facing the second sound-emitting component; the second sounding part comprises a second electromagnet, and the first electromagnet and the second electromagnet are arranged oppositely. Thus, both the sounding members include electromagnets, and both the sounding members can change magnetism by current change, so that finer vibration control can be achieved for the vibrating plate.

With reference to the fifth possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the sound generating device further includes a first secondary magnet and a second secondary magnet; the first auxiliary magnet is arranged on the outer side of the permanent magnet and is connected with the vibrating piece; the second auxiliary magnet is arranged outside the coil of the electromagnet and the first auxiliary magnet; the second sub magnet has a space from the first sub magnet in a direction perpendicular to the axis of the vibrating piece; the magnetic pole direction of the first auxiliary magnet and the magnetic pole direction of the second auxiliary magnet are both vertical to the axis direction of the vibrating reed; the magnetic pole of the first auxiliary magnet and the magnetic pole of the second auxiliary magnet are oppositely arranged in the same pole. Thus, a repulsive force is generated between the first sub-magnet and the second sub-magnet in a direction perpendicular to the axis of the vibrating reed, and the repulsive force can prevent the first sounding member from being laterally displaced with respect to the second sounding member, thereby centering the first sounding member.

With reference to the fifth or eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the sound generating device further includes a third pair of magnets; the third auxiliary magnet is arranged in the iron core of the electromagnet, and the magnetic pole of the third auxiliary magnet and the magnetic pole of the permanent magnet are arranged in a homopolar opposite mode. Therefore, a repulsive force is generated between the first sounding part and the third auxiliary magnet to offset a part of static force, so that the first sounding part and the second sounding part are more easily separated under the action of current.

With reference to the sixth possible implementation manner of the first aspect, in a tenth possible implementation manner of the first aspect, the sound generating device further includes a covering structure; the coating structure comprises a coating sheet which is arranged on the second sounding part in a pressing mode. Therefore, the second sounding part can be protected through the cladding structure, and the service life of the second sounding part is prolonged.

With reference to the tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner of the first aspect, the second sounding part is provided with an annular groove matched with the coil structure of the electromagnet; the annular groove penetrates through the coating structure and the permanent magnet along the axis direction of the vibrating piece; the coil of the electromagnet is embedded in the annular groove. Thus, the annular groove increases the displacement amplitude of the first sounding part, so that the amplitude of the vibration plate is larger.

With reference to the seventh possible implementation manner of the first aspect, in a twelfth possible implementation manner of the first aspect, the first sounding component further includes an auxiliary permanent magnet, and the auxiliary permanent magnet is disposed in an iron core of the first electromagnet. Thus, the auxiliary permanent magnet can generate a static force for attracting the first sounding part and the second sounding part together when neither the first electromagnet nor the second electromagnet is energized, so that the vibrating piece is located in the plane of the case.

With reference to the second to twelfth possible implementation manners of the first aspect, in a thirteenth possible implementation manner of the first aspect, the flexible connecting part includes an extending portion with an arc-shaped cross section, a first folding ear disposed on an outer side of the extending portion, and a second folding ear disposed on an inner side of the extending portion; the extension part is arranged between the shell and the gap of the vibrating piece, and the width of the extension part after extension is larger than the width of the gap between the shell and the vibrating piece; the first folding lug is arranged on the inner side of the shell and connected with the shell; the second tab is disposed on the inner side of the vibrating plate and connected to the vibrating plate. Thus, the vibrating piece connected to the flexible connection member can have a large displacement margin in the axial direction thereof, increasing the amplitude of the vibrating piece.

With reference to the first aspect, in a fourteenth possible implementation manner of the first aspect, the first sound generating component includes a base, and the base is connected to the housing to form an internal cavity of the sound generating device; the second sound production part is arranged in the cavity and comprises a vibrating plate, and the vibrating plate is connected with the base through a flexible connecting part. Like this, inside the vibrating reed can be hidden the sound generating mechanism, when the vibrating reed vibration sound production, the vibration of vibrating reed can not be felt to the user, improves user and uses experience.

With reference to the fourteenth possible implementation manner of the first aspect, in a fifteenth possible implementation manner of the first aspect, the first sound-emitting component includes an electromagnet, and the electromagnet is disposed on a side of the base facing the second sound-emitting component; the second sounding part includes a permanent magnet disposed on a side of the vibration plate facing the first sounding part. Therefore, the permanent magnet is connected with the vibrating plate, and when the sound production device needs to produce sound, the permanent magnet can be driven to drive the vibrating plate to produce vibration and produce sound only by applying changed current in the electromagnet.

With reference to the fourteenth possible implementation manner of the first aspect, in a sixteenth possible implementation manner of the first aspect, the first sounding part includes a permanent magnet, and the permanent magnet is disposed on a side of the vibration plate facing the second sounding part; the second sounding part includes an electromagnet, and the electromagnet is disposed on a side of the vibrating piece facing the first sounding part. Therefore, the electromagnet is connected with the vibrating plate, and when the sounding device needs to sound, the electromagnet can be driven to drive the vibrating plate to vibrate to sound only by applying variable current in the electromagnet.

With reference to the fourteenth possible implementation manner to the sixteenth possible implementation manner of the first aspect, in a seventeenth possible implementation manner of the first aspect, the flexible connecting component includes an extending portion with an arc-shaped cross section, a first folding lug arranged on an outer side of the extending portion, and a second folding lug arranged on an inner side of the extending portion; the extension part is arranged between the base and the gap of the vibrating plate, and the width of the extension part after extension is larger than the width of the gap between the base and the vibrating plate; the first folding lug is arranged on the inner side of the base and connected with the base; the second tab is disposed on the inner side of the vibrating plate and connected to the vibrating plate. Thus, the vibrating piece connected to the flexible connection member can have a large displacement margin in the axial direction thereof, increasing the amplitude of the vibrating piece.

With reference to the first aspect and the first to seventeenth possible implementations of the first aspect, in an eighteenth possible implementation of the first aspect, during operation of the sound generating device, the first sound generating part and the second sound generating part generate alternately changing repulsive force and attractive force to drive the vibrating piece to vibrate. Therefore, the vibrating plate can vibrate in a reciprocating mode under the action of the alternately changed repulsive force and attractive force to produce sound, and the vibrating plate cannot be clamped due to the fact that the stress direction is single.

In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device includes the sound generating apparatus provided in the first aspect and any implementation manner thereof.

Drawings

Fig. 1 is a schematic diagram of a terminal device with a device body and a sound device integrated in one, which is shown in an embodiment of the present application;

fig. 2 is a schematic diagram illustrating a speaker disposed on a rear cover of a terminal device according to an embodiment of the present application;

fig. 3 is an exploded view of a speaker disposed on a rear cover of a terminal device according to an embodiment of the present application;

fig. 4 is an exploded view of a sound generator according to a first embodiment of the present application;

FIG. 5 is a schematic diagram of the electromagnet of the first magnetic component according to the first embodiment of the present application;

fig. 6 is a cross-sectional view of a sound generating device provided in the first embodiment of the present application;

fig. 7 is a schematic view of the diaphragm in the equilibrium position;

FIG. 8 is a graph of static force versus distance between a first sound emitting feature and a second sound emitting feature in accordance with an embodiment of the present application;

fig. 9 is a schematic circuit structure diagram exemplarily provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of the magnetic field directions of an electromagnet and a permanent magnet provided by an embodiment of the present application;

fig. 11 is a flowchart of a driving method provided in the first embodiment of the present application;

FIG. 12 is a diagram of a first driving signal provided by an embodiment of the present application;

fig. 13 is a schematic view of a sound generating device according to the first embodiment of the present application in different states;

fig. 14 is a diagram showing a relationship between a repulsive force and a position of a vibrating piece according to an embodiment of the present application;

FIG. 15 is a diagram of a second driving signal provided by an embodiment of the present application;

FIG. 16 is a diagram of a third driving signal provided by an embodiment of the present application;

FIG. 17 is a schematic view of the lateral misalignment of the first sound emitting element relative to the second sound emitting element;

FIG. 18 is a schematic diagram of an anti-dislocation structure provided by an embodiment of the present application;

fig. 19 is an exploded perspective view of a third secondary magnet, core and coil provided in accordance with an embodiment of the present application;

FIG. 20 is a schematic structural diagram of a first secondary magnet and a second secondary magnet shown in an embodiment of the present application;

fig. 21 is a cross-sectional view of a sound emitting device provided in a second embodiment of the present application;

FIG. 22 is an exploded perspective view of a covering structure provided by an embodiment of the present application;

fig. 23 is a flowchart of a driving method according to a second embodiment of the present application;

fig. 24 is a schematic view of a sound emitting device according to a second embodiment of the present application in a different state;

fig. 25 is a cross-sectional view of a sound generating device provided in a third embodiment of the present application;

fig. 26 is a flowchart of a driving method according to a third embodiment of the present application;

fig. 27 is a schematic view of a sound emitting device according to a third embodiment of the present application in a different state;

FIG. 28 is an alternative structural schematic of a flexible attachment component shown in a fourth embodiment of the present application;

fig. 29 is a cross-sectional view of a sound emitting device provided in a fifth embodiment of the present application;

fig. 30 is a schematic structural view of a flexible connecting part of a sound emitting device according to a fifth embodiment of the present application;

fig. 31 is a cross-sectional view of a sound generating device provided in a sixth embodiment of the present application;

fig. 32 is a schematic view showing a layout of a vibrating piece according to an embodiment of the present application;

fig. 33 is a schematic view showing a layout of a vibrating piece according to an embodiment of the present application;

fig. 34 is a graph comparing frequency response curves of the sound generating device provided in the embodiment of the present application and a conventional speaker.

Detailed Description

With the popularization of the mobile internet technology, portable terminal devices such as mobile phones and tablet computers have become important carriers for users to perform daily entertainment activities such as voice video playing, audio playing, game competition and the like at present due to the characteristics of small size, thin thickness, convenience in carrying and the like. When a user uses a terminal device, the sound quality of a loudspeaker is an important index influencing the user experience. The sound quality of a loudspeaker can be influenced by factors such as the effective radiating area of the loudspeaker, the stroke (physical vibration boundary of the diaphragm) and the volume of the sound cavity. Generally, increasing the size of the speaker is beneficial to increasing the effective radiation area, increasing the stroke, increasing the volume of the sound cavity and improving the sound quality.

In order to improve the sound quality of a loudspeaker, some terminal devices adopt a screen sounding scheme, and the screen of the terminal device is used as a part of the loudspeaker in the scheme, and the vibrator directly drives the screen to vibrate and sound so as to achieve the purpose of increasing the effective radiation area. However, the screen is mostly made of glass with high rigidity, and the low-frequency performance is poor, so that the sound quality of the screen sounding scheme still has a great problem. Other terminal devices adopt a two-in-one mode of a device body and an audio device as shown in fig. 1, that is, a large-size speaker 20 with a size equivalent to that of an audio speaker is arranged on the terminal device 10, however, the terminal device 10 becomes extremely thick and heavy, and the portability of the terminal device is damaged.

In order to improve the low-frequency performance of the speaker without impairing the portability of the terminal device, one of the conventional solutions is to provide the speaker on the rear cover 11 of the terminal device as shown in fig. 2 and 3. Specifically, a vibrating reed 12 is arranged inside a rear cover 11 of the terminal device, the vibrating reed 12 is connected with the rear cover 11 of the mobile phone through a piezoelectric ceramic piece 13, and the terminal device drives the vibrating reed 12 to vibrate by controlling the vibration of the piezoelectric ceramic piece 13, so as to make a sound. However, as shown in fig. 2 and 3, since the sound generating units such as the vibrating reed 12 and the piezoelectric ceramic sheet 13 are located inside the rear cover 11 of the terminal device, a hole 141 needs to be formed in the rear cover 11 in order to guide sound outwards, but the hole 141 may damage the integrity and the aesthetic property of the integrated structure of the terminal device, so that the waterproof and dustproof performance of the terminal device is lost, and the user experience is affected.

The embodiment of the application provides a sound generating device and a driving method thereof, which can improve the tone quality of a loudspeaker, especially the low-frequency sound effect of the loudspeaker, without increasing the size of terminal equipment or damaging the structural integrity of the terminal equipment. The sound generating device may be, for example, any terminal device, including but not limited to: the mobile terminal comprises a mobile phone, a tablet computer, a personal computer, a workstation device, a large-screen device (such as a smart screen and a smart television), a wearable device (such as a smart bracelet and a smart watch), a handheld game console, a home game console, a virtual reality device, an augmented reality device, a mixed reality device and the like, a vehicle-mounted intelligent terminal and the like.

The basic thought of the sound generating device provided by the embodiment of the application is as follows: a part of the structure of the housing of the terminal device is designed as a part of the structure of the speaker (corresponding to the first sound emitting part in the following embodiments), and another part of the structure of the speaker (corresponding to the second sound emitting part in the following embodiments) is provided on the device body inside the housing, and these two parts can generate relative vibration by the interaction of the magnetic fields to emit sound, thereby reducing the volume of the terminal device.

The following is a first embodiment of the present application.

The first embodiment of the present application provides a sound generating apparatus. Fig. 4 is an exploded view of the sound generator according to the first embodiment of the present application. As shown in fig. 4, the sound generating apparatus includes: a device body 100, a housing 110, a first sound emitting part 400, and a second sound emitting part 200. The housing 110 is snap-fitted to the device body 100.

The first sound-emitting member 400 is used to constitute a part of the housing 110. In a specific implementation, the housing 110 is provided with an opening 111. The first sound emitting part 400 includes a vibrating piece 300 and a permanent magnet 470; wherein, the vibrating reed 300 is located at the opening 111 as a part of the housing 110, the shape of the vibrating reed 300 is the same as the shape of the opening 111, and the size is smaller than or equal to the size of the opening, preferably smaller than the size of the opening; the permanent magnet 470 is fixed to the side of the vibration plate 300 facing the second sound-emitting part 200, and has a magnetic property of fixed magnetic poles. The magnetic pole direction of the permanent magnet 470 is preferably the same as the axis C direction of the vibrating piece 300. The magnetic pole direction refers to a direction from one magnetic pole (for example, N pole) to the other magnetic pole (for example, S pole) of the object having magnetism.

The second sounding member 200 is located inside the vibrating piece 300, and is fixed inside the device main body 100. The second sounding member 200 may include, for example, an electromagnet 270, and the electromagnet 270 is used to generate magnetism of a corresponding magnetic pole according to a direction of current in an energized state.

Fig. 5 is a schematic structural diagram of an electromagnet 270 according to a first embodiment of the present application. As shown in fig. 5, the electromagnet 270 includes a core 210, and a coil 220 disposed around the core. The coil 220 may be connected to a driving circuit, and when the coil 220 is energized, a magnetic field B as shown in fig. 5 is generated near the coil 220, and the magnetic field B can magnetize the iron core 210, so that the magnetic field is strengthened. The direction of the magnetic field is determined by the direction of the current, and the strength of the magnetic field can be determined by the number of turns of the coil 220 and the strength of the current. The magnetic pole direction of the electromagnet is preferably the same as the axial direction of the vibration plate 300. When the coil 220 is de-energized, the magnetic field disappears, the core demagnetizes, and the electromagnet is not magnetic. In order to achieve the demagnetization characteristic of the core 210 when the coil 220 is turned off, the core 210 is preferably made of soft iron or silicon steel, which is demagnetized rapidly.

It will be appreciated that, because the permanent magnet 470 is magnetic, the permanent magnet 470 will generate a magnetic force on the core 210, whether the coil of the electromagnet 270 is energized or de-energized, and for ease of description, this magnetic force may be referred to herein as a static force. In the de-energized state of the coil 220, the first sound emitting element 400 and the second sound emitting element 200 are attracted together by the static force.

Fig. 6 is a cross-sectional view of a sound generating device according to a first embodiment of the present application. As shown in fig. 6, in the mounted state of the first and second

sound emitting parts

400 and 200, the second sound emitting part 200 is hidden in the plane of the housing 110. The sound device further includes a flexible connection member 500, wherein the flexible connection member 500 has a ring-shaped structure matching with the shapes of the vibration plate 300 and the opening 111, the size of the inner ring thereof is preferably smaller than or equal to the size of the vibration plate 300, and the size of the outer ring thereof is preferably larger than or equal to the size of the opening 111. One end of the flexible connecting member 500 close to the inner ring is connected to the vibration plate 300, and one end of the flexible connecting member 500 close to the outer ring is connected to the housing 110, so that the opening 111 can be closed by the vibration plate 300 and the flexible connecting member 500, the housing 110 of the sound generating apparatus can be kept complete, and the second sound generating member 200, the permanent magnet 470 and other components in the housing 110 can be isolated from the external environment by water and dust.

In the embodiment of the present application, the flexible connection member 500 has a certain ductility and deformability, thereby allowing a certain displacement variation of the vibration plate 300 and the permanent magnet 470 with respect to the second sound-emitting part 200, for example, a certain displacement of the vibration plate 300 and the permanent magnet 470 toward the second sound-emitting part 200 or a certain displacement of the vibration plate 300 and the permanent magnet 470 away from the second sound-emitting part 200. The flexible connecting member 500 may be made of a flexible material with a certain elasticity, such as flexible rubber, flexible plastic, and the like, which is not particularly limited in the embodiments of the present application.

As a preferred implementation manner, in a state where the second sound emitting part 200 is attached to the first sound emitting part 400, the vibration plate 300 and the housing 110 are located in the same plane, or the vibration plate 300 is located inside the plane of the housing 110, so that when the sound emitting device does not emit sound, no additional protrusion occurs on the housing 110 of the sound emitting device, thereby improving the integrity of the sound emitting device.

In the embodiment of the present application, the housing 110 of the sound generating device may be made of a metal or a non-metal material, which is not specifically limited herein, and taking a mobile phone as an example, common materials of the housing 110 may include, for example, glass, ceramic, aluminum magnesium alloy, polycarbonate, ABS resin, and the like.

In the embodiment of the present application, the vibrating plate 300 may be made of metal or nonmetal material, such as glass, ceramic, aluminum magnesium alloy, polycarbonate, ABS resin, and the like, which is not limited herein. As a preferred embodiment, the membrane 300 may be made of the same material as the housing 110, so that the sound generating device has a better appearance integrity. If the membrane 300 is of a different material than the housing 110, some surface processes may be used to make the membrane 300 visually look the same or close to the housing 110.

In the embodiment of the present application, the permanent magnet may be a natural magnet or an artificial magnet, and is not limited specifically herein. For example: natural magnetite, ferrite magnet, alnico magnet, rare earth magnet, magnetic steel, platinum magnet, nanostructure magnet, etc. from iron ore. To reduce space usage, the permanent magnets are preferably of a sheet-like structure.

In the embodiment of the present application, during the sounding of the sounding device, the vibrating plate is configured to vibrate at the first position, where "vibrating at the first position" refers to: the first position is a base position where the vibration piece vibrates, and is also a position where the amplitude is 0, and may be understood as an intermediate position where the vibration piece vibrates, and the vibration piece vibrates up and down with the intermediate position as a center when vibrating.

Fig. 7 is a schematic view of the diaphragm 300 in the equilibrium position. Fig. 8 is a graph showing the relationship between the static force and the distance between the first sound emission part and the second sound emission part according to the embodiment of the present application. As shown in fig. 7 and 8, one of the magnetic poles (e.g., N-level) of the permanent magnet 470 is disposed facing the core 210, and the other magnetic pole (e.g., S-level) is disposed facing the vibrating piece 300. It will be appreciated that since the strength of the magnetic field generated by the permanent magnet 470 will decay in a direction away from the magnetic poles, the magnitude of the static force will be related to the distance between the second sound emitting part 200 and the first sound emitting part 400, specifically: the smaller the distance S between the second sound emitting part 200 and the first sound emitting part 400, the larger the static force; the larger the distance S between the second sound emitting part 200 and the first sound emitting part 400, the smaller the static force; when the first sounding member 400 moves away from the second sounding member 200 to a certain critical position (i.e., a position where the distance S is 0 in fig. 18), the static force becomes 0; when the first sound emitting part 400 continues to move away from the second sound emitting part 200 from the critical position, the static force is always 0. In the embodiment of the present application, the position where the vibrating reed is located when the first sound-emitting component 400 is located at the critical position is referred to as an equilibrium position. In addition to the above-mentioned critical position, if there are other positions of the first sound emitting part which can make the static force 0, the position where the corresponding vibration plate is located may also be referred to as the equilibrium position. The equilibrium position is a position where the amplitude is zero when the vibration plate 300 vibrates to generate sound.

The embodiment of the present application further provides a driving method, where the driving method is used to drive the sound generating device provided in the embodiment of the present application to switch between the non-operating state, the operation preparation state, and the operating state. Fig. 9 exemplarily provides a circuit configuration for implementing the driving method. As shown in fig. 9, the circuit structure includes a decoder, a digital to analog converter (DAC), a power amplifier, a controller, a dc-free circuit, and a sound generating device. The output end of the decoder is connected with the input end of the digital-to-analog converter, and is used for decoding a sound source (such as an audio stream and an audio file) to obtain an audio digital signal and inputting the audio digital signal to the digital-to-analog converter; the output end of the digital-to-analog converter is connected with the input end of the power amplifier and used for converting the audio digital signal into an audio analog signal and inputting the audio analog signal into the power amplifier; the output end of the power amplifier is connected with the input end of the non-blocking circuit and used for carrying out power amplification on the audio frequency analog signal to obtain an alternating current component of the driving signal; the output end of the controller is connected with the input end of the power amplifier, the controller is used for generating a direct current signal and inputting the direct current signal to the power amplifier, and the direct current signal is amplified by the power amplifier and then becomes a direct current component of the driving signal; the output end of the non-blocking circuit is connected with a coil of the sounding device, and the non-blocking circuit is used for preventing a direct current component in the driving signal from being blocked by a component which possibly exists in the circuit, such as a capacitor, and ensuring that the direct current component in the driving signal can reach the coil. It should be added here that the driving signal of the embodiment of the present application may be described by a current signal or a voltage signal, and the different descriptions do not affect the implementation manner of the embodiment of the present application.

It should be added that the circuit structure provided in fig. 9 is only an example of a driving method capable of implementing the embodiment of the present application, and does not constitute a limitation to the technical solution of the present application, and those skilled in the art may design other circuits capable of implementing all or part of the functions of the circuit shown in fig. 9 when implementing the driving method, without departing from the scope of the embodiment of the present application.

In the embodiment of the present application, the dc component of the driving signal is used to make the electromagnet 270 generate a magnetic field with a constant magnetic pole direction when flowing through the coil 220, and the magnetic pole direction of the magnetic field may be specifically related to the direction of the dc component. As shown in fig. 10, specifically: one magnetic pole direction makes the electromagnet 270 and the permanent magnet 470 opposite in the same pole, for example, the N pole of the electromagnet 270 is opposite to the N pole of the permanent magnet 470, so that a repulsive force is generated between the electromagnet 270 and the permanent magnet 470, and the permanent magnet 470 is pushed to move away from the electromagnet 270; another magnetic pole direction is opposite to the electromagnet 270 and the permanent magnet 470, for example, the N pole of the electromagnet 270 is opposite to the S pole of the permanent magnet 470, so that an attractive force is generated between the electromagnet 270 and the permanent magnet 470 to push the permanent magnet 470 to move close to the electromagnet 270. For convenience of describing the direction of the dc component, the embodiments of the present application may define: the direction of the direct current component that generates a repulsive force between the electromagnet 270 and the permanent magnet 470 is made to be a forward direction, and the direction of the direct current component that generates an attractive force between the electromagnet 270 and the permanent magnet 470 is made to be a reverse direction.

Fig. 11 is a flowchart of a driving method according to a first embodiment of the present application. The method may comprise the steps of:

in step S101, when the sound generating apparatus starts to operate, the driving circuit applies a first driving signal to the coil 220, where the first driving signal includes a forward direct current component.

Fig. 12 is a schematic diagram of a first driving signal provided in an embodiment of the present application. As shown in FIG. 12, the first drive signal includes a forward DC component I _dc I.e. the dotted line portion in fig. 11, the forward direct current component I _dc The direct current signal that can be generated by the controller is amplified via a power amplifier.

Fig. 13 is a schematic view of the sound generating device according to the first embodiment of the present application in different states.

As shown in FIG. 13, when the driving circuit applies a forward DC component I to the coil 220 _dc Time, forward direct current component I _dc For generating a repulsive force between the electromagnet 270 and the permanent magnet 470, the repulsive force can counteract a static force, separate the first sounding part 400 and the second sounding part 200 from the adsorption state, and push the vibrating reed 300 to move to the equilibrium position, so that the sounding device enters the work ready state.

Fig. 14 is a diagram showing a relationship between the repulsive force and the position of the vibrating piece according to the embodiment of the present application. As shown in fig. 14, the repulsive force shows a tendency to decrease as the distance S between the electromagnet 270 and the permanent magnet 470 increases, and when the vibrating plate 300 is located at the equilibrium position, the repulsive force still exists, which makes the repulsive force have the ability to push the vibrating plate 300 to the equilibrium position.

In addition, when the sound production device starts to work and sound is played, the first driving signal also comprises an alternating current component I corresponding to the sound source _ac I.e. the solid line part in fig. 12, the alternating current component I _ac The electromagnet 270 and the permanent magnet 470 can alternately generate a repulsive force and an attractive force, and the vibrating piece 300 vibrates to generate a sound.

In step S102, during the operation of the sound generating device, the driving circuit applies a second driving signal to the coil 220, where the second driving signal includes an ac component corresponding to the sound source.

Fig. 15 is a schematic diagram of a second driving signal provided in an embodiment of the present application. As shown in FIG. 15, the second driving signal includes an AC component I _ac But does not contain a DC component I _dc . Wherein the alternating current component I _ac The audio digital signal obtained by decoding the audio source by the decoder is obtained by performing analog-to-digital conversion and power amplification by a digital-to-analog converter and a power amplifier.

When the driving circuit applies the alternating current component I to the coil 220 _ac Time, alternating current component I _ac The direction of the current in the coil 220 is alternated to generate a magnetic field with an alternated direction in the electromagnet 270, so that the electromagnet 270 and the permanent magnet 470 can be alternated between the repulsive force and the attractive force to vibrate the vibrating piece 300 around the equilibrium position, thereby generating a sound to bring the sound generating device into the operating state as shown in fig. 13.

In step S103, when the sound generating device finishes operating, the driving circuit applies a third driving signal to the coil 220, where the third driving signal includes a reverse current component.

Fig. 16 is a schematic diagram of a third driving signal provided in an embodiment of the present application. As shown in FIG. 16, the third driving signal includes an inverted DC component-I _dc The reverse direct current component-I _dc The reverse direct current signal that can be generated by the controller is amplified by a power amplifier.

When the driving circuit applies the reverse DC component-I to the coil 220 _dc Time, reverse direct current component-I _dc For generating an attractive force between the electromagnet 270 and the permanent magnet 470, which attracts the first sounding member 400, moves the first sounding member 400 from the equilibrium position to a direction close to the second sounding member 200, and re-attracts the second sounding member 200. After the second sound emitting part 200 and the first sound emitting part 400 are re-attached, the controller may stop generating the third driving signal, and the sound emitting device enters the non-operating state as shown in fig. 13, at which time the second sound emitting part 200 and the first sound emitting part 400 may maintain the attached state by the static force.

Further, as shown in fig. 10, when the same poles of the electromagnet 270 and the permanent magnet 470 are repulsive, the magnetic fields generated by the electromagnet 270 and the permanent magnet 470 have a lateral distribution therebetween, and thus the repulsive force between the electromagnet 270 and the permanent magnet 470 may include a lateral force, resulting in a tendency of lateral misalignment between the first sound-emitting member 400 and the second sound-emitting member 200.

When the lateral force is large, as shown in fig. 17, the first sounding member 400 is laterally displaced with respect to the second sounding member 200 and may be adsorbed to the peripheral structure of the second sounding member 200, and the flexible connection member 500 is in a twisted state, so that the vibrating reed 300 cannot normally vibrate and sound.

In an alternative implementation manner, in order to avoid the second sound generating component 200 from being laterally misaligned with the first sound generating component 400, the embodiment of the present application further provides a misalignment preventing structure. Fig. 18 is a schematic diagram of the anti-dislocation structure. As shown in fig. 18, the dislocation prevention structure may include a first sub-magnet 600 and a second sub-magnet 700. The first sub-magnet 600 is disposed outside the permanent magnet 470 around the permanent magnet and connected to the vibrating piece 300, and the magnetic pole direction (i.e., the direction from the N pole to the S pole) of the first sub-magnet 600 is preferably perpendicular to the axis C direction of the vibrating piece 300. The iron core 210 of the electromagnet extends from below the coil 220 to the outside of the coil 220 in a direction away from the axis C, and the second sub-magnet 700 is disposed around the electromagnet outside the coil 220 and the first sub-magnet 600 of the electromagnet, and is connected to a portion of the iron core 210 of the electromagnet outside the coil 220. The second sub-magnet 700 has a certain interval 760 from the first sub-magnet 600 in a direction perpendicular to the axis C of the vibration plate 300. The magnetic pole direction of the second sub-magnet 700 is preferably perpendicular to the axis C direction of the vibrating piece 300. The magnetic poles of the first sub-magnet 600 and the second sub-magnet 700 are oppositely arranged in the same polarity, for example, the S-pole or the N-pole, so that a repulsive force is generated between the first sub-magnet 600 and the second sub-magnet 700 in the direction perpendicular to the axis C of the vibrating reed 300, and the repulsive force can weaken the action of a transverse force, prevent the first sound-emitting component 400 from being transversely displaced with respect to the second sound-emitting component 200, and perform a centering action on the first sound-emitting component 400. In the embodiment of the present application, the first and

second sub-magnets

600 and 700 may be made of a permanent magnetic material or an electromagnet, and are not limited in this embodiment.

Further, according to the embodiment of the present application, the forward direct current component of the first driving signal is used to generate a repulsive force between the second sound emitting part 200 and the first sound emitting part 400 to cancel out the static force, so that the second sound emitting part 200 is separated from the first sound emitting part 400 in the attracted state. However, it is understood that when the static force is large, there may be a case where the forward direct current component cannot cancel the static force, so that the second sound emitting part 200 cannot be separated from the first sound emitting part 400. In order to avoid the situation that the second sound emission part 200 cannot be separated from the first sound emission part 400, as shown in fig. 18, the electromagnet further includes a third sub-magnet 800 (a dark gray portion in fig. 18 to which reference numeral 800 points), and the third sub-magnet 800 may be disposed, for example, in the core 210 at the center of the coil 220 of the electromagnet. The magnetic pole direction of the third sub-magnet 800 is preferably perpendicular to the axis C direction of the vibrating reed 300, and the magnetic poles of the first sound-emitting component 400 and the third sub-magnet 800 are oppositely arranged in the same polarity, for example, the S pole is oppositely arranged or the N pole is oppositely arranged, so that a repulsive force is generated between the first sound-emitting component 400 and the third sub-magnet 800 to offset a part of static force, and the second sound-emitting component 200 and the first sound-emitting component 400 are more easily separated under the action of the forward direct current component.

To further facilitate an understanding of the structural relationship of the third sub-magnet 800, the core 210 and the coil 220, fig. 19 provides an exploded perspective view of the third sub-magnet 800, the core 210 and the coil 220. As shown in fig. 19, the core 210 may include an upper core 211 and a lower core 212, the upper core 211 having a diameter smaller than that of the lower core 212, and the upper core 211 being disposed at an upper center position of the lower core 212. The third sub-magnet 800 is disposed between the upper iron core 211 and the lower iron core 212, an upper surface of the third sub-magnet 800 is connected to the upper iron core 211, and a lower surface of the third sub-magnet 800 is connected to the lower iron core 212. Thus, the third sub-magnet 800 is pressed and fixed in the iron core 210 by the upper iron core 211 and the lower iron core 212, and becomes a part of the iron core 210. When the coil 220 is mounted with the core 210, the coil 220 is seated on the lower core 212, and the coil 220 surrounds the upper core 211 and the outside of the third sub-magnet 800.

Fig. 20 is a schematic structural diagram of the first and

second sub-magnets

600 and 700 according to the embodiment of the present application.

In one implementation, as shown in structure 1 in fig. 20, the first and second

secondary magnets

600, 700 may each be an annular structure. Wherein the first sub-magnet 600 is disposed around the outside of the coil 220; the second sub-magnet 700 is arranged around the outside of the permanent magnet 470, and the inner ring of the second sub-magnet 700 is connected with the outer ring of the permanent magnet 470; the diameter of the first sub-magnet 600 is larger than that of the second sub-magnet 700 so that the first sub-magnet 600 is simultaneously disposed around the outside of the second sub-magnet 700.

In one implementation, as shown in structure 2 in fig. 20, the first sub-magnet 600 may include a plurality of magnetic blocks 610, and the plurality of magnetic blocks 610 are distributed in an array around the permanent magnet 470, the second sub-magnet 700 includes a plurality of magnetic blocks 710 having the same number as the first sub-magnet 600, and the plurality of magnetic blocks 710 are distributed in an array around the coil 220, the magnetic blocks 610 of the first sub-magnet 600 and the magnetic blocks 710 of the second sub-magnet 700 are arranged in a one-to-one correspondence. It should be noted that, in addition to the above-mentioned structure 1 and structure 2, the first sub magnet 600 and the second sub magnet 700 may have other structures, for example, the first sub magnet 600 is in an annular structure, and the second sub magnet 700 is in a magnetic block structure, or the first sub magnet 600 is in a magnetic block structure, and the second sub magnet 700 is in an annular structure, which is not limited in the embodiment of the present application.

The following is a second embodiment of the present application.

The second embodiment of the present application provides a sound generating device, which is different from the sound generating device provided by the first embodiment of the present application in that: the second sounding part 200 includes a permanent magnet 280, and the first sounding part 400 includes an electromagnet 480. Next, the structure of the sound generating device according to the second embodiment of the present application will be specifically described with reference to fig. 21. It should be noted that, for the content that is not described in the second embodiment of the present application, please refer to the first embodiment of the present application.

As shown in fig. 21, the device body may be provided with a covering structure 120 for fixing the second sound generating component 200, and the second sound generating component 200 (i.e., the permanent magnet 280) may be covered by the covering structure 120 in the device body, and the covering structure 120 may form a cavity for accommodating the second sound generating component 200, for example. The electromagnet 480 of the first sounding member 400 is fixed to the side of the vibration plate 300 facing the second sounding member 200. The electromagnet 480 includes a core 410 and a coil 420 disposed around the core 410, and a magnetic pole direction of the electromagnet 480 is preferably the same as the axis C direction of the vibration plate 300.

As further shown in fig. 21, the device body is further provided with an annular groove 130 matching the structure of the coil 420, the width of the annular groove 130 is preferably larger than the width of the coil 420, so that the coil 420 can be embedded in the annular groove 130, and the annular groove 130 can prevent the first sound generating part 400 from being misaligned with respect to the second sound generating part 200 in addition to providing a moving space for the coil 420.

As an alternative implementation, when the second sound emitting part 200 is enclosed by the enclosing structure 120, the annular groove 130 may be disposed through the enclosing structure 120 and the second sound emitting part 200 along the axial direction of the vibration plate 300.

To further understand the structural relationship between the second sound producing component 200 and the covering structure 120, fig. 22 shows an exploded perspective view of the covering structure 120. In one implementation, the aperture 111 in the device body may be circular or other shape, as shown in fig. 22. The second sounding part 200 is disposed in the opening 111, and the diameter of the second sounding part 200 is smaller than that of the opening, thereby forming an annular groove 130 between the device body and the second sounding part 200. The covering structure 120 includes a covering sheet 121, a diameter of the covering sheet 121 is smaller than a diameter of the opening 111, preferably the same as a diameter of the second sound-emitting component 200, and the covering sheet 121 is pressed on the second sound-emitting component 200 to wrap the second sound-emitting component 200. In the embodiment of the present application, the covering structure is preferably made of a non-conductive material, such as plastic, foam, etc., so as not to interfere with the normal operation of other magnetic components.

In one implementation, the second sound-emitting component 200 may also have a portion embedded in the hole wall 112 of the opening 111, and in this case, a portion of the casing 122 of the device body located outside the opening 111 presses the second sound-emitting component 200 onto the hole wall 112, so that the portion of the casing 122 also belongs to the covering structure 120.

The second embodiment of the present application provides a sound generating apparatus that can be driven by using the driving circuit shown in fig. 9 to switch between a non-operating state, an operation-ready state, and an operating state.

Fig. 23 is a flowchart of a driving method according to a second embodiment of the present application. The method may comprise the steps of:

in step S201, when the sound generating device starts to operate, the driving circuit applies a first driving signal to the coil 420, where the first driving signal includes a forward direct current component.

Fig. 24 is a schematic view of a sound emitting device according to a second embodiment of the present application in a different state.

As shown in FIG. 24, when the driving circuit applies a forward DC component I to the coil 420 _dc Time, forward direct current component I _dc A repulsive force is generated between the permanent magnet 280 and the electromagnet 480, the repulsive force can cancel a static force, the first sounding part 400 is separated from the apparatus body from the attached state, and the vibrating piece 300 is pushed to move away from the second sounding part 200 to the equilibrium positionThe sound generating apparatus enters the operation ready state shown in fig. 24.

In step S202, during the operation of the sound generating device, the driving circuit applies a second driving signal to the coil 420, where the second driving signal includes an ac component corresponding to the sound source.

When the driving circuit applies an alternating current component I to the coil 420 _ac Time, alternating current component I _ac The direction of the current in the coil 420 is alternately changed to generate a magnetic field in which the direction of the electromagnet 480 is alternately changed, so that the repulsive force and the attractive force between the permanent magnet 280 and the electromagnet 480 are alternately changed to generate vibration about the equilibrium position of the vibrating piece 300, thereby generating sound to bring the sound generating device into the operating state shown in fig. 24.

In step S203, when the sound generating device finishes operating, the driving circuit applies a third driving signal to the coil 420, where the third driving signal includes a reverse current component.

When the driving circuit applies a reverse DC component-I to the coil 420 _dc Time, reverse direct current component-I _dc An attractive force is generated between the permanent magnet 280 and the electromagnet 480, and the attractive force attracts the first sounding member 400, so that the first sounding member 400 moves from the equilibrium position in a direction approaching the second sounding member 200, and is attached to the apparatus main body again. In addition, after the first sound-emitting device 400 and the apparatus body are attached again, the controller may stop generating the third driving signal, and at this time, the first sound-emitting device 400 and the apparatus body may be kept attached by the static force, and the sound-emitting apparatus enters the non-operating state shown in fig. 24.

The following is a third embodiment of the present application.

A third embodiment of the present application provides a sound generating device that differs from the sound generating device provided in the first embodiment in that: the first sound generating member 400 includes a first electromagnet 490 and the second sound generating member 200 includes a second electromagnet 290. Next, a structure of a sound generating device according to a third embodiment of the present invention will be specifically described with reference to fig. 25. It should be noted that, for the content that is not described in the third embodiment of the present application, please refer to the first embodiment of the present application.

As shown in fig. 25, the first electromagnet 490 includes a first core 430 and a first coil 440 disposed around the first core 430, and a secondary permanent magnet 900 may be further disposed in the first core 430, for example, the secondary permanent magnet 900 may be embedded inside the first core 430 to generate a static force. The second electromagnet 290 includes a second core 230, and a second coil 240 disposed around the second core 230. The magnetic pole direction of the first electromagnet 490 and the second electromagnet 290 is preferably the same as the axial direction of the vibrating piece 300.

The sound generating apparatus provided in the third embodiment of the present application can be driven by using the driving circuit shown in fig. 9 to switch between the non-operating state, the operation standby state, and the operating state.

Fig. 26 is a flowchart of a driving method according to a third embodiment of the present application. The method may comprise the steps of:

in step S301, when the sound generating apparatus starts to operate, the driving circuit applies a first driving signal to the first coil 440 and/or the second coil 240, where the first driving signal includes a forward direct current component.

Fig. 27 is a schematic view of a sound emitting device according to a third embodiment of the present application in a different state.

As shown in fig. 27, when the driving circuit applies the forward direct current component I in the first coil 440 and/or the second coil 240 _dc In this case, the first electromagnet 490 and the second electromagnet 290 are magnetized to generate a repulsive force, and the repulsive force can counteract the static force, so that the first sounding part 400 and the second sounding part 200 are separated from the attraction state, the vibrating reed 300 is pushed away from the second sounding part 200 to the equilibrium position, and the sounding device enters the operation ready state shown in fig. 27.

Among them, the direction in which the first coil 440 and the second coil 240 apply the direct current component may be determined according to the winding direction of the first coil 440 and the second coil 240, for example: if the winding directions of the first coil 440 and the second coil 240 are the same, the directions of the direct current components applied in the first coil 440 and the second coil 240 are opposite; if the winding directions of the first coil 440 and the second coil 240 are opposite, the directions of the direct current components applied in the first coil 440 and the second coil 240 are the same.

In step S302, during the operation of the sound generating device, the driving circuit applies a second driving signal to the first coil 440 and the second coil 240, wherein the second driving signal includes an ac component corresponding to the sound source.

When the driving circuit applies the alternating current component I to the first coil 440 and the second coil 240 _ac Time, alternating current component I _ac The direction of the current in the first coil 440 and the second coil 240 is alternated to generate a magnetic field with the direction alternated between the first electromagnet 490 and the second electromagnet 290, so that the repulsive force and the attractive force between the second sounding members 200 and the first sounding members 400 can be alternated to generate vibration around the equilibrium position of the vibrating reed 300, thereby generating sound and bringing the sounding device into the operation state as shown in fig. 27.

In step S303, when the sound generating device finishes operating, the driving circuit applies a third driving signal to the first coil 440 and/or the second coil 240, where the third driving signal includes a reverse current component.

When the driving circuit applies the reverse DC component-I to the first coil 440 and the second coil 240 _dc At this time, the first and

second electromagnets

490 and 290 are magnetized to generate an attractive force, which can move the first sounding member 400 from the equilibrium position to a direction close to the second sounding member 200 and be re-attracted to the second sounding member 200. After the second sound emitting part 200 and the first sound emitting part 400 are re-adsorbed, the driving circuit may stop applying the reverse direct current component-I _dc At this time, the second sounding member 200 and the first sounding member 400 can be kept attracted by the static force, and the sounding device enters the non-operating state shown in fig. 27.

Among them, the direction in which the first coil 440 and the second coil 240 apply the direct current component may be determined according to the winding direction of the first coil 440 and the second coil 240, for example: if the winding directions of the first coil 440 and the second coil 240 are the same, the directions of the direct current components applied in the first coil 440 and the second coil 240 are the same; if the winding directions of the first coil 440 and the second coil 240 are opposite, the directions of the direct current components applied in the first coil 440 and the second coil 240 are opposite.

It should be noted that in the third embodiment of the present invention, in a state where the sound generating device does not generate sound, the first coil 440 and the second coil 240 may not be energized, and the first sound generating part 400 may be kept in a stationary state by being supported by the flexible connecting member 500, in this case, the vibration plate 300 is always located outside the plane of the case 110 when sound generation is required or when sound generation is not required, and a gap is provided between the first sound generating part 400 and the second sound generating part 200.

The following is a fourth embodiment of the present application.

The first embodiment of the present application provides a flexible connection component 500 that can be applied to any of the above embodiments. Fig. 28 shows an alternative configuration of the flexible connecting member 500.

In one implementation, flexible connection component 500 may be as shown in structure 1 of fig. 28. Specifically, the flexible connecting member 500 includes an extension 510 having an arc-shaped cross section, a first tab 520 disposed outside the extension, and a second tab 530 disposed inside the extension. The extending portion 510 is disposed between the case 110 and the gap of the vibrating reed 300; the first tab 520 is disposed inside the housing 110 and connected to the housing 110; the second tab 530 is disposed inside the vibrating reed 300 and connected to the vibrating reed 300. Since the extension portion 510 has an arc-shaped structure, a width after extension thereof is larger than a width of a gap between the case 110 and the vibration plate 300, which causes the vibration plate 300 connected to the flexible connection member 500 to have a large displacement margin in an axial direction thereof, increasing an amplitude of the vibration plate 300.

In another implementation, flexible connection component 500 may be as shown in structure 2 of FIG. 28. Specifically, the flexible connection member 500 is a planar structure, one end of which is disposed inside the housing 110 and is connected to the housing 110; the other end is disposed inside the vibrating reed 300 and connected to the vibrating reed 300. The flexible connection member 500 is preferably made of a material having good ductility and strong deformability, so that the deformation used provides a displacement margin for the vibration plate 300.

In yet another implementation, flexible connection component 500 may be as shown in structure 3 of FIG. 28. Specifically, the flexible connecting member 500 has a folding fan-shaped structure and thus has a spring-like telescopic characteristic. One end of the flexible connecting portion is connected to the vibrating piece 300, and the other end is connected to the device main body. Thus, the flexible connection member 500 can be compressed or extended in the axial direction of the vibration plate 300, thereby providing a displacement margin of the vibration plate 300 and increasing the amplitude of the vibration plate 300.

The following is a fifth embodiment of the present application.

A fifth embodiment of the present application provides a sound generating device. Fig. 29 is an exploded view of a sound generating device according to a fifth embodiment of the present application. As shown in fig. 29, the sound emission device includes: device body 100, housing 110.

The housing 110 is fastened to the device body 100, a first sound-emitting member 400 is provided in a partial region of the housing 110, and the first sound-emitting member 400 is fixedly connected to the housing 110 as a part of the housing. In one implementation, the housing 110 may be provided with an opening 111, the first sound-emitting component 400 is provided at the opening, and the second sound-emitting component may be provided with a matching structure matched with the shape and size of the opening 111 for being connected with the housing 110, thereby forming an integral body with the housing 110.

In one implementation, the first sound-emitting member 400 may include a base 450 and an electromagnet 460. The base 450 may be a flat plate-shaped structure, and is disposed at the opening 111, and the edge of the base is connected to the housing 110. The specific connection manner of the edge of the base 450 and the shell 110 may be gluing, embedding, snap-fit connection, etc., which is not limited in the embodiments of the present application. The electromagnet 460 may be disposed on the inner side of the base 450, that is, the side facing the device main body 100, and the electromagnet 460 may have any conventional electromagnet structure, for example, including a coil and an iron core, and may be specifically implemented by referring to the electromagnet structure in any embodiment described above, which is not described in detail in this fifth embodiment of the present application.

The area of the device body 100 corresponding to the first sound emitting part 400 is provided with the second sound emitting part 200, and the second sound emitting part 200 is disposed to face the first sound emitting part 400 and is flexibly connected to the device body 100. The first sound emitting part 400 generates vibration in a direction perpendicular to the housing 110 by the second sound emitting part 200, thereby emitting sound.

In one implementation, the second sound emitting part 200 may include a vibration plate 300, a permanent magnet 250, and a flexible connection part 500. The vibrating reed 300 is disposed in a cavity between the first sound-emitting component 400 and the device body 100.

Fig. 30 is a schematic view showing a connection mode of a vibrating piece according to a fifth embodiment of the present application. As shown in fig. 30, the edge of the vibrating piece 300 is connected to the inner ring of the flexible connecting member 500, and the outer ring of the flexible connecting member 500 is connected to the base 450. The vibrating reed 300 may be suspended between the first sound-emitting device 400 and the device body 100 with a certain distance from both the first sound-emitting device 400 and the device body 100 by the elastic support of the flexible connection member 500. It is understood that, besides the connection manner shown in fig. 30, the flexible connection component 500 may also have other connection manners, for example, an outer ring of the flexible connection component 500 is connected to the device main body 100, and the like, which is not limited in this embodiment.

Further, the permanent magnet 250 is disposed at a side of the vibration plate 300 facing the first sound-emitting part 400, and the permanent magnet 250 is disposed to face the electromagnet 460. Thus, when the electromagnet 460 is energized, an attractive force or a repulsive force may be generated between the permanent magnet 250 and the electromagnet 460, thereby driving the vibration plate 300 to vibrate and generate a sound.

In one implementation, the base 450 may have a structure protruding toward the outside of the device, such as a zigzag structure, so that a larger cavity is formed between the second sound emitting part 200 and the device body 100. Thus, diaphragm 300 may have a greater amplitude and produce a more pronounced sound.

In one implementation, in order to facilitate the sound to be transmitted from the inside of the casing 110 to the outside, one or more sound outlet holes 140 may be provided on the casing 110, and the sound outlet holes 140 may adopt a conventional sound outlet dustproof structure design, which is not limited in this application.

The following is a sixth embodiment of the present application.

The sixth embodiment of the present application provides a sound generating apparatus. Fig. 31 is an exploded view of a sound generator according to a sixth embodiment of the present application. As shown in fig. 31, the sound emission device includes: device body 100, housing 110.

One difference between the sound generating device provided by the sixth embodiment and the sound generating device provided by the fifth embodiment of the present application is that: the first sound-emitting part 400 includes a base 450 and a permanent magnet 250, and the permanent magnet 250 may be disposed at an inner side of the base 450, i.e., a side facing the apparatus body 100. The permanent magnet 250 may be a natural magnet or an artificial magnet, and may be implemented by referring to the permanent magnet structure in any of the above embodiments, which is not described in detail in embodiment six of the present application.

Another difference between the sound generating device provided by the sixth embodiment and the sound generating device provided by the fifth embodiment of the present application is that: the second sound emitting part 200 may include a vibration plate 300, a coil 260, and a flexible connection part 500. Wherein the coil 260 is disposed on a side of the vibration plate 300 facing the first sound emitting part 400, and the coil 260 is disposed to face the permanent magnet 250.

In one implementation, the coil 260 is coaxially disposed with the permanent magnet 250, and the diameter of the coil 260 is preferably larger than that of the permanent magnet 250, and the thickness of the coil 260 in a direction perpendicular to the vibration plate 300 is larger than the distance between the permanent magnet 250 and the vibration plate 300. Thus, the coil 260 may have a portion sleeved around the periphery of the permanent magnet 250, and when the coil 260 is energized, the magnetic field generated by the coil 260 can penetrate more through the permanent magnet 250.

According to the sixth embodiment of the present invention, when the coil 260 is energized, an attractive force or a repulsive force may be generated between the permanent magnet 250 and the coil 260, so as to drive the vibration plate 300 to vibrate and generate sound.

Parts which are not specifically described in the sixth embodiment of the present application can be implemented by referring to the fifth embodiment of the present application, and are not described herein again.

The following is a seventh embodiment of the present application.

The seventh embodiment of the present application takes a sound device as an example of a mobile phone, and provides an arrangement manner of the vibrating piece 300 on the sound device. Fig. 32 is a schematic view of the arrangement of the vibrating piece 300.

In a first implementation, as shown in mode 1 of fig. 32, a circular camera module 30 is provided on the back of the mobile phone, and is arranged on the upper side of the back of the mobile phone in the left-right center. The vibrating plate 300 is also designed to be circular, and is arranged side by side with the camera module 30 up and down, and the diameter of the vibrating plate is preferably the same as that of the camera module 30, so as to improve the aesthetic appearance of the back of the mobile phone.

In a second implementation, as shown in mode 2 of fig. 32, a circular camera module 30 is disposed on the back of the mobile phone, for example, the "star design" is disposed on the upper side of the back of the mobile phone. The vibrating piece 300 is also designed to be circular correspondingly, and is disposed at the center of the circular ring, and its diameter is smaller than or equal to the inner circle diameter of the camera module 30. Thus, the vibrating reed 300 is visually integrated with the design of the camera module 30, and is integrated with the camera module 30, thereby providing a high aesthetic appearance.

In a third implementation, as shown in mode 3 in fig. 32, a circular camera module 30 is disposed on the back of the mobile phone, and is centered on the left and right of the back of the mobile phone. The vibrating piece 300 is designed in a ring shape, the diameter of the inner circle thereof is greater than or equal to the diameter of the camera module 30, and is disposed around the outside of the camera module 30. Thus, the vibrating reed 300 has a decorative effect on the camera module 30, and is visually more harmonious and highly attractive.

In a fourth implementation, as shown in mode 4 in fig. 32, a square camera module 30 is provided on the back of the mobile phone, and is arranged on the upper side of the back of the mobile phone in the left-right center. The vibrating reed 300 is also designed to be square, and is arranged in parallel with the camera module 30 up and down, and the size of the vibrating reed is preferably the same as that of the camera module 30, so as to improve the appearance of the back of the mobile phone.

In a fifth implementation, as shown in mode 5 in fig. 32, a rectangular camera module 30 is disposed on the back of the mobile phone, and the camera module 30 is located at the upper left corner of the back of the mobile phone. The vibrating reed 300 is also designed to be rectangular correspondingly, and is arranged side by side with the camera module 30 at the left and right, and the size of the vibrating reed is preferably the same as that of the camera module 30, so as to improve the aesthetic degree of the back appearance of the mobile phone.

In a sixth implementation, as shown in mode 6 in fig. 32, a rectangular camera module 30 is disposed on the back of the mobile phone, and the camera module 30 is located at the upper left corner of the back of the mobile phone. The vibrating plate 300 is also designed to be rectangular correspondingly, and is arranged in parallel with the camera module 30 up and down, and the size of the vibrating plate is preferably the same as that of the camera module 30, so as to improve the aesthetic degree of the back appearance of the mobile phone.

It should be noted that the arrangement of the vibrating reed 300 and the camera module 30 shown in fig. 32 in the embodiment of the present application is only an example, and does not constitute a specific limitation to the embodiment of the present application, and those skilled in the art can reasonably design the arrangement of the vibrating reed 300 and the camera module 30 according to the configuration and size of the terminal device, the shape of the camera module 30, and the like when implementing the present application, without departing from the protection scope of the embodiment of the present application.

The following is an eighth embodiment of the present application.

The eighth embodiment of the present application takes a sound generating device as an example of a mobile phone, and provides an arrangement manner of the base 450 on the sound generating device. Fig. 33 is a schematic view of the arrangement of the base 450.

In a first implementation, as shown in mode 1 of fig. 32, the camera module 30 is provided with a rounded rectangle on the back of the mobile phone, and is arranged on the upper side of the back of the mobile phone in the left-right center. Wherein, each camera of camera module 30 can distribute in the upper portion of camera module 30, and base 450 can set up the lower part at camera module 30, and base 450 also designs into circularly correspondingly to base 450 can be located the coplanar with camera module 30, with the pleasing to the eye degree that improves cell-phone back outward appearance.

In a second implementation, as shown in mode 2 of fig. 32, a circular camera module 30 is disposed on the back of the mobile phone, for example, the "star design" is disposed on the upper side of the back of the mobile phone. The base 450 is also designed to be circular correspondingly and is disposed at the center of the circular ring, the diameter of the base is smaller than or equal to the diameter of the inner circle of the camera module 30, and the base 450 and the camera module 30 can be located on the same plane. Thus, the base 450 is visually integrated with the design of the camera module 30, and is integrated with the camera module 30, thereby providing a high aesthetic appearance.

In a third implementation, as shown in mode 3 in fig. 32, a rectangular camera module 30 is provided on the back of the mobile phone, and is centered on the left and right sides of the back of the mobile phone. Wherein, each camera of camera module 30 can distribute in the upper portion of camera module 30, and base 450 can set up the lower part at camera module 30, and base 450 also designs into circularly correspondingly to base 450 can be located the coplanar with camera module 30, with the pleasing to the eye degree that improves cell-phone back outward appearance.

In a fourth implementation, as shown in mode 4 in fig. 32, a rectangular camera module 30 is provided on the back of the mobile phone, and is centered on the left and right sides of the mobile phone. Wherein, camera module 30's each camera can distribute in camera module 30's left part, and base 450 can set up the right part at camera module 30, and base 450 also designs into circularly correspondingly to base 450 can be located the coplanar with camera module 30, with the pleasing to the eye degree that improves cell-phone back outward appearance.

In a fifth implementation, as shown in mode 5 in fig. 32, a rectangular camera module 30 is disposed on the back of the mobile phone, and is centered on the left upper corner of the back of the mobile phone. Wherein, each camera of camera module 30 can distribute in the left part of camera module 30, and base 450 can set up the right part at camera module 30, and base 450 also designs into circularly correspondingly to base 450 can be located the coplanar with camera module 30, with the pleasing to the eye degree that improves cell-phone back outward appearance.

It should be noted that the arrangement of the base 450 and the camera module 30 shown in fig. 32 in the embodiment of the present application is only an example, and does not constitute a specific limitation to the embodiment of the present application, and those skilled in the art can reasonably design the arrangement of the base 450 and the camera module 30 according to the structural form and size of the terminal device, the shape of the camera module 30, and the like when implementing the present application, without departing from the protection scope of the embodiment of the present application.

According to the technical scheme, the sound generating device provided by the embodiment of the application is provided with the opening on the shell, the vibrating piece and the shell are connected through the flexible connecting part, the opening is sealed, and the shell structure of the sound generating device is kept complete. When the sound generating device does not work, the first sound generating part and the second sound generating part are adsorbed together through static force, so that the vibrating plate and the shell are in the same plane, and the size and the thickness of the sound generating device are not increased. When the sounding device works, the driving signal enables repulsion force to be generated between the first sounding part and the second sounding part through the forward direct current component, the vibrating plate is pushed to the balance position, and the vibrating plate has a certain distance between the balance position and the second sounding part, so that the vibrating plate can have larger amplitude when vibrating and sounding, and therefore, the low-frequency performance is better.

In order to visually demonstrate the excellent low-frequency performance of the sound generating device provided in the embodiment of the present application, the applicant adopts the technical solution of the embodiment of the present application and the conventional speaker solution on the terminal device, and measures and obtains the frequency response curves of the two solutions under the condition of playing the same sound source and the same power, as shown in fig. 34. In fig. 34, the abscissa represents the frequency output to the sound generating device (or the conventional speaker), and the ordinate represents the effective Sound Pressure (SPL) output by the sound generating device (or the conventional speaker), where the larger the effective sound pressure is, the better the response is. As can be seen from fig. 34, in a low frequency region (for example, in a region from 100Hz to approximately 1000 Hz), the effective sound pressure of the technical solution of the embodiment of the present application is always greater than that of the conventional speaker solution, and it can be seen that the technical solution of the embodiment of the present application has more excellent low frequency performance, and can improve the low frequency sound quality.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A sound generating device, comprising:

a housing, a partial area of which includes a first sound emitting part;

the second sound-producing component is positioned in the device and is opposite to the first sound-producing component;

the first sound emitting part or the second sound emitting part includes a vibration plate;

the first sounding part and the second sounding part are used for mutually matching to drive the vibrating plate to vibrate to generate sound.

2. The sound-emitting device of claim 1,

the first sound emitting part includes the vibrating piece, and the vibrating piece is connected to the case by a flexible connecting part.

3. The apparatus according to claim 2,

when the sound-producing device does not need to produce sound, the vibrating plate and the shell are located on the same plane.

4. The apparatus according to claim 3,

when the sound generating device does not need to generate sound, the first sound generating component and the second sound generating component are attached to each other;

when the sounding device needs to generate sound, the first sounding part and the second sounding part are matched with each other to generate repulsion force, so that the vibrating plate is pushed to a first position, and the first position is located outside a plane where the shell is located;

the vibrating plate is used for vibrating at the first position in the sounding process of the sounding device.

5. The apparatus according to claim 2,

the vibrating piece is located outside the plane of the shell, and a gap is formed between the first sounding part and the second sounding part.

6. The sound-emitting device according to any one of claims 2 to 5,

the first sounding part comprises a permanent magnet, and the permanent magnet is arranged on one side of the vibrating reed facing the second sounding part;

the second sounding part comprises an electromagnet, and the electromagnet and the permanent magnet are arranged oppositely.

7. The sound-emitting device according to any one of claims 2 to 5,

the first sounding part comprises an electromagnet, and the electromagnet is arranged on one side of the vibrating reed, which faces the second sounding part;

the second sounding part comprises a permanent magnet, and the permanent magnet and the electromagnet are arranged oppositely.

8. The sound-emitting device according to any one of claims 2 to 5,

the first sounding part comprises a first electromagnet, and the first electromagnet is arranged on one side of the vibrating reed, which faces the second sounding part;

the second sounding part comprises a second electromagnet, and the first electromagnet and the second electromagnet are arranged oppositely.

9. The sound generating apparatus of claim 6, further comprising: a first and a second sub-magnet;

the first auxiliary magnet is arranged on the outer side of the permanent magnet and is connected with the vibrating reed;

the second sub-magnet is arranged outside the coil of the electromagnet and the first sub-magnet;

the second sub magnet has a space from the first sub magnet in a direction perpendicular to an axis of the vibrating piece;

the magnetic pole direction of the first auxiliary magnet and the magnetic pole direction of the second auxiliary magnet are both vertical to the axis direction of the vibrating reed; the magnetic pole of the first auxiliary magnet and the magnetic pole of the second auxiliary magnet are oppositely arranged in the same pole.

10. The sound generating apparatus according to claim 6 or 9, further comprising: a third sub-magnet;

the third auxiliary magnet is arranged in the iron core of the electromagnet, and the magnetic pole of the third auxiliary magnet and the magnetic pole of the permanent magnet are oppositely arranged in the same pole.

11. The sound generating apparatus of claim 7, further comprising: a cladding structure;

the coating structure comprises a coating sheet, and the coating sheet is arranged on the second sound production part in a pressing mode.

12. The sound generating device according to claim 11, wherein said second sound generating element is provided with an annular groove matching the coil structure of said electromagnet; the annular groove penetrates through the cladding structure and the permanent magnet along the axis direction of the vibrating piece; the coil of the electromagnet is embedded in the annular groove.

13. The apparatus according to claim 8, wherein said first sounding component further comprises a secondary permanent magnet disposed in an iron core of said first electromagnet.

14. The sound generating apparatus according to any one of claims 2 to 13,

the flexible connecting part comprises an extension part with an arc-shaped section, a first folding lug arranged on the outer side of the extension part and a second folding lug arranged on the inner side of the extension part;

the extension portion is disposed between the case and the gap of the vibrating piece, and a width of the extension portion after extension is larger than a width of the gap between the case and the vibrating piece;

the first folding lug is arranged on the inner side of the shell and is connected with the shell;

the second tab is disposed on an inner side of the vibrating plate and connected to the vibrating plate.

15. The sound-emitting device of claim 1,

the first sound-generating component comprises a base, and the base is connected with the shell to form an internal cavity of the sound-generating device;

the second sound production part is arranged in the cavity, the second sound production part comprises the vibrating plate, and the vibrating plate is connected with the base through a flexible connecting part.

16. The apparatus according to claim 15,

the first sounding component comprises an electromagnet, and the electromagnet is arranged on one side, facing the second sounding component, of the base;

the second sounding part includes a permanent magnet disposed on a side of the vibration plate facing the first sounding part.

17. The apparatus according to claim 15,

the first sounding part includes a permanent magnet disposed on a side of the vibration plate facing the second sounding part;

the second sounding part comprises an electromagnet, and the electromagnet is arranged on one side, facing the first sounding part, of the vibrating piece.

18. The sound-generating apparatus of any one of claims 15-17,

the extension part is arranged between the base and the gap of the vibrating piece, and the width of the extension part after extension is larger than the width of the gap between the base and the vibrating piece;

the first folding lug is arranged on the inner side of the base and is connected with the base;

19. The sound-emitting device according to any one of claims 1-18,

during the operation of the sounding device, the first sounding part and the second sounding part generate alternately-changed repulsion and attraction to drive the vibrating plate to vibrate.