Audio device and electronic device

Abstract

The application discloses an audio device and an electronic device, and relates to the field of electronic devices. An audio device comprises a shell, a diaphragm assembly and a driving module. The shell is provided with a first cavity. The diaphragm assembly is arranged in the first cavity, the edge of the diaphragm assembly is connected with the inner wall of the first cavity, the diaphragm assembly divides the first cavity into a first sound cavity and a second sound cavity, and the side wall of the first sound cavity is provided with a sound outlet. The driving module is arranged in the second sound cavity, the driving module has a deformable area, the driving module changes the air pressure in the second sound cavity through the deformation of the deformable area, so that the diaphragm assembly vibrates to produce sound. The application can solve the problem that the performance of the audio device is limited due to the fact that the size of the diaphragm is limited by the size of the loudspeaker.

Description

Technical Field

[0001] This application belongs to the technical field of electronic devices, specifically relating to an audio device and an electronic device. Background Technology

[0002] Speakers are indispensable components in electronic devices (such as mobile phones), used to provide sound signals, and the performance of speakers affects the audio performance of electronic devices.

[0003] In related technologies, loudspeakers primarily consist of a magnetic circuit system composed of components such as a voice coil and a magnet. When the voice coil is energized, it interacts with the magnet to drive the diaphragm to vibrate through the magnetic circuit system. Additionally, a housing is installed outside the loudspeaker to form the front and rear acoustic chambers of the audio device.

[0004] However, the performance of the entire audio device is mainly affected by the volume of air pushed by the speaker's voice coil driving the diaphragm and the movement of the dome. Although the audio device's casing is relatively large, the size of the diaphragm is limited by the size of the speaker. When the size of the speaker is fixed, the size of the diaphragm is also fixed and will not increase due to the large casing volume. Thus, under the same volume, the performance of the audio device is limited due to the limited size of the diaphragm. Summary of the Invention

[0005] The purpose of this application is to provide an audio device and electronic device that can solve the problem that the performance of the audio device is limited due to the limitation of the diaphragm size by the size of the speaker.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides an audio device, including: a housing, a diaphragm assembly, and a drive module; The housing is provided with a first cavity; The diaphragm assembly is disposed in the first cavity, and the edge of the diaphragm assembly is connected to the inner wall of the first cavity. The diaphragm assembly divides the first cavity into a first sound cavity and a second sound cavity. The side wall of the first sound cavity is provided with a sound outlet. The drive module is disposed in the second acoustic cavity. The drive module has a deformable area. The drive module changes the air pressure in the second acoustic cavity by deforming the deformable area, so as to make the diaphragm assembly vibrate and produce sound.

[0007] This application also provides an electronic device, including the audio device described above.

[0008] In this embodiment, the audio device places the drive module within the second acoustic cavity and drives the diaphragm assembly to vibrate by changing the air pressure within the second acoustic cavity. This eliminates the squeezing and driving effect of the drive module on the diaphragm assembly, freeing its distribution area from the limitations imposed by the drive module. Consequently, the diaphragm assembly can be designed to fit the shape of the housing, maximizing the vibration area of ​​the audio device and improving its performance. Compared to audio devices in related technologies, this embodiment does not separately house the speaker within the housing; instead, the drive module and diaphragm assembly are integrated within the housing. This removes the size limitation of the speaker from the diaphragm assembly. Furthermore, this embodiment does not directly squeeze and drive the diaphragm assembly to vibrate via a magnetic circuit system. Instead, it drives the diaphragm assembly to vibrate by changing the air pressure in the second acoustic cavity through the drive module. This frees the diaphragm assembly from the limitations of the magnetic circuit system in the speaker and allows it to adapt to the shape of the housing. This increases the vibration area of ​​the diaphragm assembly within the same volume, further enhancing the performance of the audio device. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the vibration principle of the audio device disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the first type of housing and diaphragm assembly disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the second type of housing and diaphragm assembly disclosed in the embodiments of this application; Figure 4 This is a schematic diagram of the third type of housing and diaphragm assembly disclosed in the embodiments of this application; Figure 5 This is a cross-sectional schematic diagram of the housing and diaphragm assembly disclosed in the embodiments of this application; Figure 6 This is a schematic diagram of an audio device employing the first driving method disclosed in an embodiment of this application; Figure 7 This is a schematic diagram of an audio device employing the second driving method disclosed in an embodiment of this application; Figure 8 This is a schematic diagram of an audio device employing a third driving method as disclosed in an embodiment of this application.

[0010] Explanation of reference numerals in the attached figures: 10-Shell; 11-First cavity; 11a-First sound cavity; 11b-Second sound cavity; 12-Sound outlet; 20-Drive module; 21-Second cavity; 211-First bottom wall; 212-Second bottom wall; 213-Peripheral wall; 214-Airflow channel; 22-Magnetic component; 23-Voice coil; 24-Extendable component; 25-Bidirectional air pump; 30 - Diaphragm assembly; 31 - Dome; 32 - Folded ring. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0013] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0014] refer to Figures 1 to 8 This application discloses an audio device, which includes a housing 10, a diaphragm assembly 30, and a drive module 20.

[0015] The housing 10 is a basic component that provides space for the diaphragm assembly 30 and the drive module 20, and also provides some protection for the diaphragm assembly 30 and the drive module 20. The housing 10 has a first cavity 11, in which the diaphragm assembly 30 and the drive module 20 can be housed.

[0016] The edge of the diaphragm assembly 30 is connected to the inner wall of the first cavity 11, allowing the diaphragm assembly 30 to be directly installed inside the housing 10 and distributed according to the shape of the housing 10, which is beneficial for realizing irregular designs, such as... Figures 2 to 4 As shown, this design method can maximize the vibration area.

[0017] Optionally, the cross-section of the housing 10 can be polygonal, circular, elliptical, racetrack-shaped, etc., and correspondingly, the diaphragm assembly 30 can be polygonal, circular, elliptical, racetrack-shaped, etc. In addition, the housing 10 and the diaphragm assembly 30 can also be in other shapes, which are not specifically limited here.

[0018] In addition, the edge of the diaphragm assembly 30 can be fixedly connected to the inner wall of the first cavity 11, such as by bonding or welding, which helps to improve the installation stability of the diaphragm assembly 30; or, the edge of the diaphragm assembly 30 can be detachably connected to the inner wall of the first cavity 11, such as by snap-fit ​​or hook-fit, which can both ensure the installation stability of the diaphragm assembly 30 and facilitate the replacement of the diaphragm assembly 30.

[0019] Furthermore, such as Figure 1 As shown, the diaphragm assembly 30 can divide the first cavity 11 into a first sound cavity 11a and a second sound cavity 11b. The side wall of the first sound cavity 11a is provided with a sound outlet 12, and the drive module 20 is disposed in the second sound cavity 11b. Thus, under the driving action of the drive module 20, the diaphragm assembly 30 can vibrate and generate sound waves. The sound waves in the first sound cavity 11a can be transmitted through the sound outlet 12 for the user to listen to. Optionally, the first sound cavity 11a and the second sound cavity 11b can be isolated by the diaphragm assembly 30, so that the two are not connected.

[0020] In order to drive the diaphragm assembly 30 to vibrate, the drive module 20 may have a deformable region. The drive module 20 can change the air pressure in the second sound cavity 11b by deforming the deformable region, so as to make the diaphragm assembly 30 vibrate and produce sound.

[0021] It should be noted that the second acoustic cavity 11b is a closed cavity. In the initial state, the initial volume of the second acoustic cavity 11b is fixed. When the deformable area of ​​the drive module 20 protrudes outward, the volume inside the second acoustic cavity 11b decreases. Correspondingly, the air pressure inside the second acoustic cavity 11b increases. Since the area of ​​the diaphragm assembly 30 remains unchanged, the increase in air pressure leads to an increase in the pressure on the diaphragm assembly 30, thereby causing the diaphragm assembly 30 to deform from the second acoustic cavity 11b towards the first acoustic cavity 11a. Conversely, when the deformable area of ​​the drive module 20 is concave inward, the volume inside the second acoustic cavity 11b increases. Correspondingly, the air pressure inside the second acoustic cavity 11b decreases. Since the area of ​​the diaphragm assembly 30 remains unchanged, the decrease in air pressure leads to a decrease in the pressure on the diaphragm assembly 30, thereby causing the diaphragm assembly 30 to deform from the first acoustic cavity 11a towards the second acoustic cavity 11b. Based on this, as the deformable area of ​​the drive module 20 continuously bulges outward and concave inward, the diaphragm assembly 30 can continuously vibrate. In this way, the diaphragm assembly 30 continuously drives the gas to vibrate, thereby generating sound waves.

[0022] Optionally, the drive module 20 can be separated from the diaphragm assembly 30 within the second sound cavity 11b. In this case, by changing the air pressure within the second sound cavity 11b, the entire area of ​​the diaphragm assembly 30 can vibrate to produce sound, thereby improving the vibration effect and optimizing the sound production effect.

[0023] In other embodiments, the drive module 20 is located within the second acoustic cavity 11b, and the non-deformable area of ​​the drive module 20 (i.e., the area other than the deformable area) can contact a local area of ​​the diaphragm assembly 30. For example, the non-deformable area of ​​the drive module 20 can contact the edge area of ​​the diaphragm assembly 30. In this way, the non-deformable area of ​​the drive module 20 can support the local area of ​​the diaphragm assembly 30. Thus, during the process of the drive module 20 driving the diaphragm assembly 30 to vibrate by changing the air pressure through the deformation of the deformable area, the non-deformable area can provide a certain degree of resistance to the local area of ​​the diaphragm assembly 30, thereby effectively alleviating the problem of excessive amplitude of the diaphragm assembly 30.

[0024] Based on the above configuration, the audio device in this embodiment of the application places the drive module 20 inside the second sound cavity 11b, and drives the diaphragm assembly 30 to vibrate by changing the air pressure inside the second sound cavity 11b, so that the diaphragm assembly 30 is no longer subjected to the squeezing and driving action of the drive module 20. This allows the distribution area of ​​the diaphragm assembly 30 to be unrestricted by the drive module 20, and the diaphragm assembly 30 to be designed according to the shape of the housing 10. Therefore, the vibration area of ​​the audio device can be maximized, which is beneficial to improving the performance of the audio device.

[0025] Compared to audio devices in related technologies, the housing 10 in this embodiment no longer houses a separate speaker. Instead, the drive module 20 and the diaphragm assembly 30 are integrated within the housing 10. This eliminates the size limitation of the speaker for the diaphragm assembly 30. Furthermore, instead of directly compressing the diaphragm assembly 30 with a magnetic circuit system, this embodiment uses the drive module 20 to change the air pressure in the second acoustic cavity 11b to drive the diaphragm assembly 30 to vibrate. This frees the diaphragm assembly 30 from the limitations of the magnetic circuit system in the speaker and allows it to adapt to the shape of the housing 10. This increases the vibration area of ​​the diaphragm assembly 30 within the same volume, which is beneficial for improving the performance of the audio device.

[0026] refer to Figure 1 , Figures 6 to 8In some embodiments, the drive module 20 may include a second cavity 21 with a variable volume, located inside the second sound cavity 11b. The second cavity 21 includes a deformable region for deformation. It should be noted that a force can be applied to the deformable region within the second cavity 21 to cause it to bulge outwards or inwards towards the second sound cavity 11b. This structure can change the air pressure within the second cavity 21 by altering its volume, thereby driving the deformation of the deformable region. In practical operation, this can be achieved, for example, by simply pumping gas from the second cavity 21, offering advantages such as simple structure and convenient operation. Optionally, the deformable region may be located on at least a portion of the cavity wall of the second cavity 21.

[0027] Optionally, the drive module 20 can be a spherical structure, columnar structure, block structure, etc., with a second cavity 21, which can be set according to actual needs.

[0028] For example, when the drive module 20 is provided with a second cavity 21, the drive module 20 can be a hollow component, such as a bladder, a ball, or other structures.

[0029] When the drive module 20 does not have a second cavity 21, the drive module 20 can be a deformable part with a sealing ring around its edge, such as an electro-deformable part or a shape memory metal sheet, and the edge of the deformable part is sealed to the inner wall of the first sound cavity 11a through the sealing ring. The deformable part is either fitted to or spaced from the first sound cavity 11a.

[0030] Based on the above configuration, when the deformable component deforms towards the side facing away from the inner wall of the second sound cavity 11b, it can move away from the inner wall of the second sound cavity 11b, thus increasing the space on that side and correspondingly decreasing the space on the other side (i.e., the space where the diaphragm assembly 30 is located). Subsequently, when the deformable component deforms towards the inner wall of the second sound cavity 11b, the space on that side decreases, and the space on the other side increases. Therefore, as the deformable component reciprocates, the diaphragm assembly 30 can be vibrated to produce sound by changing the air pressure.

[0031] Optionally, the outer surface of the drive module 20 may be entirely provided with deformable areas, or it may be provided in parts, depending on actual needs.

[0032] In some embodiments, the total area of ​​the deformable region is greater than the vibration area of ​​the diaphragm assembly 30. Based on this, the amplitude of the deformable region can be smaller than the amplitude of the diaphragm assembly 30. Thus, a large amplitude vibration can be achieved through a small amplitude vibration, which can help improve the vibration effect and thereby enhance audio performance.

[0033] In some embodiments, the drive module 20 may adopt a cylindrical structure with a second cavity 21 to change the air pressure in the second sound cavity 11b by changing the shape of the cylindrical structure, thereby realizing the vibration and sound generation of the diaphragm assembly 30.

[0034] refer to Figures 5 to 8 In some more specific embodiments, the drive module 20 may include a first bottom wall 211, a second bottom wall 212 and a peripheral wall 213. The diaphragm assembly 30, the first bottom wall 211 and the second bottom wall 212 are arranged in sequence at intervals. The peripheral wall 213 is connected around the first bottom wall 211 and the second bottom wall 212. Based on this, a second cavity 21 can be formed by the peripheral wall 213, the first bottom wall 211 and the second bottom wall 212. Furthermore, the first bottom wall 211 and the diaphragm assembly 30 will not interfere with each other.

[0035] Optionally, the first bottom wall 211 and the second bottom wall 212 can be planar or curved, and the cross-section of the peripheral wall 213 can be a straight line or a curve, which can be selected according to actual needs.

[0036] Optionally, the drive module 20 can adopt a cylindrical structure, where the upper bottom wall of the cylindrical structure is the first bottom wall 211, the lower bottom wall of the cylindrical structure is the second bottom wall 212, and the annular wall of the cylindrical structure is the peripheral wall 213. In other embodiments, the drive module 20 can also adopt a prism cylindrical structure, where the upper bottom wall of the prism cylindrical structure is the first bottom wall 211, the lower bottom wall of the prism cylindrical structure is the second bottom wall 212, and the polygonal annular wall of the prism cylindrical structure is the peripheral wall 213. Other shapes are also possible, and no specific limitation is made here.

[0037] Optionally, at least one of the first bottom wall 211 and the second bottom wall 212 may be provided with a deformable region, so that the diaphragm assembly 30 can be driven by deforming at least one of the first bottom wall 211 and the second bottom wall 212. This design can change the position and area of ​​the deformable region according to actual needs in order to meet different vibration requirements.

[0038] In addition, the peripheral wall 213 can be made of a rigid material so that the outer peripheral wall 213 does not deform, so that the first bottom wall 211 and the second bottom wall 212 can be stably supported by the outer peripheral wall 213 respectively.

[0039] It should be noted that when both the first bottom wall 211 and the second bottom wall 212 are provided with deformable areas, when both the first bottom wall 211 and the second bottom wall 212 bulge outward toward the second sound cavity 11b, the air pressure in the second sound cavity 11b can be greatly increased, which can help increase the amplitude of the diaphragm assembly 30; when both the first bottom wall 211 and the second bottom wall 212 are concave toward the second cavity 21, the air pressure in the second sound cavity 11b can be greatly reduced, which can also help increase the amplitude of the diaphragm assembly 30.

[0040] When one of the first bottom wall 211 and the second bottom wall 212 is provided with a deformable area, when the first bottom wall 211 or the second bottom wall 212 protrudes outward toward the second sound cavity 11b, the air pressure in the second sound cavity 11b can be slightly increased, which can help reduce the amplitude of the diaphragm assembly 30; when the first bottom wall 211 or the second bottom wall 212 is concave toward the second cavity 21, the air pressure in the second sound cavity 11b can be slightly reduced, which can also help reduce the amplitude of the diaphragm assembly 30.

[0041] When both the first bottom wall 211 and the second bottom wall 212 are provided with deformable regions, the area of ​​the deformable region of the first bottom wall 211 can be equal to the area of ​​the deformable region of the second bottom wall 212. This allows the air pressure inside the second sound cavity 11b to be increased or decreased by an integer multiple. Compared to a configuration where only one of the first bottom wall 211 and the second bottom wall 212 has a deformable region, having both of them improves the efficiency of air pressure changes within the second sound cavity 11b and facilitates subsequent calculations of these changes.

[0042] Of course, the area of ​​the deformable region of the first bottom wall 211 and the area of ​​the deformable region of the second bottom wall 212 may not be equal. For example, the area of ​​the deformable region of the first bottom wall 211 may be greater than the area of ​​the deformable region of the second bottom wall 212, or the area of ​​the deformable region of the first bottom wall 211 may be less than the area of ​​the deformable region of the second bottom wall 212. The specific design can be determined according to actual needs.

[0043] In other embodiments, the peripheral wall 213 may also be provided with a deformable area, so that the air pressure change in the second sound cavity 11b is changed by the deformation of the deformable area of ​​the peripheral wall 213, and the diaphragm assembly 30 is further vibrated.

[0044] It should be noted that, according to actual needs, the deformable area can be set in at least one of the first bottom wall 211, the second bottom wall 212 and the peripheral wall 213, as long as the deformation of the deformable area can drive the diaphragm assembly 30 to vibrate, and the specific setting is not limited.

[0045] In some embodiments, when both the first bottom wall 211 and the second bottom wall 212 are provided with deformable regions, the areas of the deformable regions of the first bottom wall 211 and the second bottom wall 212 are both smaller than the vibration area of ​​the diaphragm assembly 30, and the sum of the areas of the deformable regions of the first bottom wall 211 and the second bottom wall 212 is greater than the vibration area of ​​the diaphragm assembly 30. It should be noted that the vibration area can be understood as the area of ​​the region capable of generating vibration.

[0046] It should be noted that, under the same energy conditions, the larger the vibration area, the smaller the corresponding amplitude, and vice versa. Thus, when the sum of the areas of the deformable regions of the first bottom wall 211 and the second bottom wall 212 is greater than the vibration area of ​​the vibration component, the amplitudes of the deformable regions of the first bottom wall 211 and the second bottom wall 212 can both be smaller than the amplitude of the diaphragm component 30. That is, a large amplitude vibration can be achieved through a small amplitude vibration, which can help improve the vibration effect and thus enhance the audio performance.

[0047] In some more specific embodiments, the area of ​​the deformable region of the first bottom wall 211 can be approximately 2 / 3 of the vibration area of ​​the diaphragm assembly 30. Of course, other proportional relationships are also possible, and the specific design can be based on actual needs. The area of ​​the deformable region of the second bottom wall 212 can be approximately 2 / 3 of the vibration area of ​​the diaphragm assembly 30. Of course, other proportional relationships are also possible, and the specific design can be based on actual needs.

[0048] In some embodiments, the drive module 20 may include a drive component, at least a portion of which is connected to the deformable region to apply a force to the deformable region, thereby causing the deformable region to deform and thus driving the deformable region to vibrate.

[0049] In the case where deformation of the deformable region is caused by a driving component, the driving method is magnetic drive. Optionally, refer to... Figure 6 The driving component may include a magnetic element 22 and a voice coil 23. The magnetic element 22 and the voice coil 23 may both be disposed in the second cavity 21, and the voice coil 23 is connected to the deformable region. Thus, when the voice coil 23 is energized, the voice coil 23 and the magnetic element 22 can interact to drive the deformable region to vibrate.

[0050] Optionally, a fixed bracket may be provided inside the second cavity 21. The fixed bracket is connected to the inner wall of the second cavity 21, and the magnetic component 22 may be disposed on the fixed bracket to support the magnetic component 22 and ensure the stability of the magnetic component 22.

[0051] In some more specific embodiments, the magnetic element 22 can be distributed on the inner and outer sides of the voice coil 23 respectively, so as to improve the magnetic effect between the voice coil 23 and the magnetic element 22.

[0052] Optionally, if one of the first bottom wall 211 and the second bottom wall 212 has a deformable area, a voice coil 23 can be provided, which is connected to the corresponding deformable area; if both the first bottom wall 211 and the second bottom wall 212 have deformable areas, two voice coils 23 can be provided, which are respectively connected to the deformable areas of the first bottom wall 211 and the second bottom wall 212.

[0053] Furthermore, the two voice coils 23 can share the same set of magnetic elements 22. In this case, the space occupied by the magnetic elements 22 in the second cavity 21 can be reduced, which is beneficial to reducing the size of the drive module 20. Of course, the two voice coils 23 can also each have their own magnetic elements 22.

[0054] The driving method can be retractable. Optionally, refer to... Figure 7 The driving component may include a telescopic member 24, which is disposed in the second cavity 21 and connected to the deformable area so as to drive the deformable area to vibrate through the extension and retraction of the telescopic member 24.

[0055] Optionally, if one of the first bottom wall 211 and the second bottom wall 212 is provided with a deformable area, the telescopic member 24 can be connected to the inner wall of the second cavity 21, and the telescopic member 24 has a telescopic end that can be connected to the corresponding deformable area.

[0056] When both the first bottom wall 211 and the second bottom wall 212 are provided with deformable areas, the telescopic member 24 may have two telescopic ends, which are respectively connected to the deformable areas of the first bottom wall 211 and the second bottom wall 212.

[0057] Optionally, there can be one or more telescopic members 24, with each telescopic member 24 having two telescopic ends, and each telescopic member 24 having two ends connected to a corresponding deformable area.

[0058] Alternatively, the retractable component 24 may be made of electromagnets, shape memory metals, etc.

[0059] refer to Figure 1 In some embodiments, the cavity wall of the second cavity 21 may be provided with an airflow channel 214, which extends through the side wall of the second acoustic cavity 11b. The airflow channel 214 is used to input or output gas to cause the deformable region to vibrate. Based on this, the airflow channel 214 can connect the inner cavity of the second cavity 21 with the outside world, thereby balancing the air pressure inside and outside the second cavity 21 during the vibration of the deformable region and improving the vibration effect of the deformable region.

[0060] In other embodiments, when a driving component is provided in the second cavity 21, if the driving component has a strong driving effect on the deformable region, the airflow channel 214 may not be provided, so that the second cavity 21 is a sealed cavity. In this case, even if the air pressure in the second cavity 21 changes during the vibration of the deformable region, the deformable region can still have a good vibration effect.

[0061] Optionally, the airflow channel 214 can have an airflow damping effect, preventing the airflow from flowing directly and rapidly into the second cavity 21 and causing large fluctuations in the deformable area, thereby making the vibration more stable. For example, the airflow channel 214 can be designed as a slender labyrinth to increase airflow resistance and create a damping effect; of course, a damping joint can also be separately provided at the airflow channel 214 to dampen the airflow.

[0062] refer to Figure 8 In some embodiments, a bidirectional air pump 25 may be provided at the airflow channel 214. The bidirectional air pump 25 can inflate the second cavity 21 to increase the air pressure in the second sound cavity 11b by causing the deformable area to bulge outward. The bidirectional air pump 25 can also depressurize the second cavity 21 to decrease the air pressure in the second sound cavity 11b by causing the deformable area to concave inward. Based on this, the vibration of the deformable area can be achieved by the cyclic inflation or deflation of the bidirectional air pump 25, thereby causing the diaphragm assembly 30 to vibrate and generate sound waves by the changing air pressure in the second sound cavity 11b.

[0063] refer to Figures 2 to 5 In some embodiments, the diaphragm assembly 30 may include a dome 31 and an elastically deformable fold 32, the fold 32 being connected between the edge of the dome 31 and the inner wall of the first cavity 11, so as to support the dome 31 through the fold 32 and to achieve the vibration of the dome 31 through the elastic deformation of the fold 32.

[0064] Furthermore, the shape of the dome 31 is adapted to the shape of the cross-section of the housing 10 perpendicular to the first direction, wherein the first direction is parallel to the vibration direction of the diaphragm assembly 30. Based on this, the vibration area of ​​the diaphragm assembly 30 can be maximized, which is beneficial to improving the audio effect.

[0065] In this embodiment, the shape of the folded ring 32 can be adjusted according to acoustic requirements, mainly to match the stiffness in the acoustic design and optimize the distortion effect of the diaphragm assembly 30; the dome 31 is made of a material with high strength and light weight to ensure small split vibration at high frequencies and to reduce the mass of the diaphragm assembly 30.

[0066] Based on the aforementioned audio device, this application also discloses an electronic device, which includes the aforementioned audio device. The electronic device can be a mobile phone, tablet computer, wearable device, etc.

[0067] In summary, the diaphragm assembly 30 in this embodiment is no longer limited by the magnetic circuit system, can be designed to match the shape of the housing 10, and can be directly installed on the inner wall of the housing 10, separate from the drive module 20, and not limited by the drive module 20, thus maximizing the vibration area.

[0068] By setting a drive module 20 in the second sound cavity 11b to change the air pressure in the second sound cavity 11b, the vibration of the diaphragm assembly 30 is achieved. This allows the drive module 20 to be designed flexibly, which is beneficial to reducing the size of the drive module 20 and is suitable for miniaturization design.

[0069] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An audio device, characterized in that, include: Housing (10), diaphragm assembly (30) and drive module (20); The housing (10) is provided with a first cavity (11); The diaphragm assembly (30) is disposed in the first cavity (11), and the edge of the diaphragm assembly (30) is connected to the inner wall of the first cavity (11). The diaphragm assembly (30) divides the first cavity (11) into a first sound cavity (11a) and a second sound cavity (11b). The side wall of the first sound cavity (11a) is provided with a sound outlet (12). The drive module (20) is located in the second sound cavity (11b). The drive module (20) has a deformable area. The drive module (20) changes the air pressure in the second sound cavity (11b) by deforming the deformable area, so that the diaphragm assembly (30) vibrates and produces sound.

2. The audio device according to claim 1, characterized in that, The drive module (20) is provided with a second cavity (21) with a variable volume, and the second cavity (21) is located inside the second sound cavity (11b); The second cavity (21) includes the deformable region, which is used for deformation.

3. The audio device according to claim 2, characterized in that, The area of ​​the deformable region is greater than the vibration area of ​​the diaphragm assembly (30).

4. The audio device according to claim 2 or 3, characterized in that, The drive module (20) includes a drive component disposed in the second cavity (21), at least a portion of the drive component being connected to the deformable region to drive the deformable region to vibrate.

5. The audio device according to claim 4, characterized in that, The driving component includes a magnetic element (22) and a voice coil (23); The voice coil (23) is connected to the deformable region. When the voice coil (23) is energized, the voice coil (23) interacts with the magnetic element (22) to drive the deformable region to vibrate.

6. The audio device according to claim 4, characterized in that, The driving component includes a telescopic member (24) connected to the deformable region to drive the deformable region to vibrate through the telescopic movement of the telescopic member (24).

7. The audio device according to claim 2 or 3, characterized in that, The cavity wall of the second cavity (21) is provided with an airflow channel (214), which extends out of the side wall of the second sound cavity (11b). The airflow channel (214) is used to input or output gas so as to make the deformable area vibrate.

8. The audio device according to claim 7, characterized in that, A bidirectional air pump (25) is provided at the airflow channel (214).

9. The audio device according to claim 1, characterized in that, The diaphragm assembly (30) includes a dome (31) and an elastically deformable fold (32). The shape of the dome (31) is adapted to the shape of the cross section of the housing (10) perpendicular to a first direction, which is parallel to the vibration direction of the diaphragm assembly (30); The fold (32) is connected between the edge of the dome (31) and the inner wall of the first cavity (11).

10. An electronic device, characterized in that, Includes the audio device according to any one of claims 1 to 9.

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