Sound production device and electronic device

Abstract

The application discloses a vibrating sound production device and electronic equipment, the vibrating sound production device comprises a shell, a magnetic circuit system, a first vibrating system and a second vibrating system. The center magnetic part and the edge magnetic part are arranged at intervals to define a magnetic gap, the center magnetic part comprises a plurality of first sub-center magnets distributed at intervals along a first direction. The voice coil of the first vibrating system is inserted into the magnetic gap, the second vibrating system comprises an elastic connecting piece and a vibrator assembly, the elastic connecting piece suspends the vibrator assembly in the installation space, the vibrator assembly comprises a counterweight and a drive coil, the drive coil has two oppositely arranged connecting edges, and the two connecting edges are oppositely arranged with two adjacent first sub-center magnets along a second direction. The body part of the magnetic yoke is provided with a hollow hole, the edge magnetic part and the first sub-center magnets located at both ends are arranged in the body part, and the hollow hole is at least partially opposite to the drive coil along the second direction. According to the vibrating sound production device of the embodiment of the application, the structure design is simple and compact.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic equipment, and in particular to a sound-generating device and electronic equipment. Background Technology

[0002] Smart terminal devices, especially mobile phones, typically need to provide both audio and haptic feedback experiences. The audio experience comes from the sound-generating unit, while the haptic feedback comes from the vibration unit. One related technology proposes a vibration-generating module that integrates the sound-generating unit and the vibration unit into a single unit. In this module, the sound-generating unit and the vibration unit are separately configured as independent control units, and then stacked within the housing of the vibration-generating module. While this structure achieves integration of the sound-generating unit and the vibration unit, the vibration-generating module occupies too much assembly space, thus hindering the miniaturization and lightweight design of the terminal device. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a vibration sound-generating device, which has the advantages of simple and compact structure and good sound generation and vibration effects.

[0004] The present invention also proposes an electronic device having the above-mentioned vibration sound-generating device.

[0005] According to a first aspect of the present invention, a vibration-generating device includes a housing defining an installation space; a magnetic circuit system comprising a central magnetic portion and side magnetic portions outside the central magnetic portion, the central magnetic portion and the side magnetic portions being spaced apart to define a magnetic gap, the central magnetic portion comprising a plurality of first sub-central magnets spaced apart along a first direction, the magnetization directions of two adjacent first sub-central magnets being opposite; a first vibration system and a second vibration system, the first vibration system and the second vibration system being respectively disposed on opposite sides of the magnetic circuit system, the first vibration system vibrating along a second direction perpendicular to the first direction, the first vibration system comprising a diaphragm assembly and a voice coil, one end of the voice coil being connected to the diaphragm assembly, and the other end of the voice coil being inserted into the magnetic gap; The second vibration system vibrates along the first direction. The second vibration system includes an elastic connector and an oscillator assembly. The two ends of the elastic connector are respectively connected to the oscillator assembly and the inner wall of the housing to suspend the oscillator assembly in the installation space. The oscillator assembly includes a counterweight and a drive coil disposed on the counterweight. The drive coil has two connecting edges arranged opposite each other. Along the second direction, the two connecting edges are respectively arranged opposite to two adjacent first sub-center magnets. The magnetic circuit system also includes a magnetic yoke. The magnetic yoke includes a body and a hollow hole disposed on the body. The side magnetic part and the first sub-center magnets located at both ends are disposed on the body. Along the second direction, the hollow hole is at least partially opposite to the drive coil.

[0006] According to a first aspect embodiment of the vibration sound-generating device, by arranging a plurality of first sub-central magnets spaced apart along a first direction in the central magnetic part, and by arranging the two connecting sides of the drive coil along the second direction opposite to two adjacent first sub-central magnets, the magnetic field of the central magnetic part with low utilization in the first vibration system can be used as the magnetic field of the second vibration system, thereby improving the magnetic field utilization of the central magnetic part, saving a set of magnetic circuit systems, reducing production costs, and saving the assembly space occupied by a set of magnetic circuit systems, thus satisfying the miniaturization and thinning design of the vibration sound-generating device.

[0007] According to some embodiments of the present invention, there are at least three first sub-center magnets, and two adjacent first sub-center magnets are spaced apart to form a spacer. The number of drive coils is the same as the number of spacers, and the center holes of the drive coils are arranged in a one-to-one correspondence with the spacers.

[0008] According to some embodiments of the present invention, the side magnetic part includes a side magnet, and the side magnet and a plurality of first sub-center magnets are all magnetized along the second direction, and the magnetization directions between adjacent side magnets and first sub-center magnets and between two adjacent first sub-center magnets are opposite.

[0009] According to some embodiments of the present invention, the central magnetic part further includes a central magnetic guide plate, and the side of the plurality of first sub-central magnets away from the second vibration system is connected to the central magnetic guide plate.

[0010] According to some embodiments of the present invention, the projections of the other first sub-center magnets between the first sub-center magnets located at both ends along the second direction are all located inside the edge of the hollow hole.

[0011] In some embodiments of the present invention, along the second direction, the other first sub-center magnets located between the first sub-center magnets at both ends extend into the hollow hole.

[0012] According to some embodiments of the present invention, a portion of the first sub-center magnet located at both ends is disposed on the body portion, and another portion of the first sub-center magnet is disposed opposite to the hollow hole.

[0013] According to some embodiments of the present invention, there are multiple driving coils and one hollow hole, and the hollow hole is arranged corresponding to the multiple driving coils; or, there are multiple hollow holes, and the multiple hollow holes are arranged one-to-one with the multiple driving coils.

[0014] According to some embodiments of the present invention, along the first direction, the gap between two adjacent first sub-center magnets is close to zero or equal to zero.

[0015] An electronic device according to a second aspect of the present invention includes a vibration-generating sound device according to the above-described embodiments of the present invention.

[0016] According to the second aspect of the present invention, the electronic device, by providing the above-mentioned vibration sound-generating device, has a compact structural design, occupies little assembly space, and has good sound generation and vibration effects, thereby meeting the requirements for lightweight and thin design of electronic devices, and also enabling electronic devices to have both good sound quality and vibration feedback effects, thereby enhancing the product market competitiveness of electronic devices.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the exploded structure of a vibration sound-generating device according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the exploded structure of a vibration sound-generating device according to another embodiment of the present invention;

[0021] Figure 3 This is a vertical cross-sectional view of a vibration sound-generating device according to an embodiment of the present invention along a first direction;

[0022] Figure 4 This is a vertical cross-sectional view of a vibration sound-generating device according to another embodiment of the present invention along a first direction;

[0023] Figure 5 This is a vertical cross-sectional view of a vibration sound-generating device according to an embodiment of the present invention along a third direction;

[0024] Figure 6 This is a vertical cross-sectional view of a vibration sound-generating device according to another embodiment of the present invention along a third direction;

[0025] Figure 7 This is a vertical cross-sectional view of a vibration sound-generating device according to another embodiment of the present invention along a third direction.

[0026] Figure label:

[0027] Vibration sound generating device 100,

[0028] Casing 1,

[0029] Magnetic circuit system 2, central magnetic part 21, first sub-central magnet 211, second sub-central magnet 212, central magnetic guide plate 213, support part 2131, extension part 2132, side magnetic part 22, side magnet 221, side magnetic guide plate 222, first plate body 2221, second plate body 2222, recessed part 222a, magnetic gap 2a, interval part 2b, magnetic yoke 23, body part 231, hollow hole 232.

[0030] First vibration system 3, diaphragm assembly 31, diaphragm 311, dome 312, voice coil 32.

[0031] The second vibration system 4 includes an elastic connector 41, an oscillator assembly 42, a counterweight 421, an assembly groove 421a, a drive coil 422, and a connecting edge 4221. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The following is for reference. Figures 1-7 A vibration sound-generating device 100 according to a first aspect embodiment of the present invention is described in detail. The vibration sound-generating device 100 can be a speaker module that has both sound generation and vibration functions.

[0034] like Figures 1-7 As shown, the vibration sound-generating device 100 according to a first aspect embodiment of the present invention includes: a housing 1, a magnetic circuit system 2, a first vibration system 3, and a second vibration system 4.

[0035] like Figures 3-7 As shown, the housing 1 defines an installation space, and the magnetic circuit system 2 is disposed within the installation space. The first vibration system 3 and the second vibration system 4 can be disposed on opposite sides of the magnetic circuit system 2, respectively. The magnetic circuit system 2 may include a central magnetic part 21 and a side magnetic part 22 disposed outside the central magnetic part 21. The central magnetic part 21 and the side magnetic part 22 are spaced apart to define a magnetic gap 2a. The central magnetic part 21 includes a plurality of first sub-central magnets 211 spaced apart along a first direction, and the magnetization directions of two adjacent first sub-central magnets 211 are opposite.

[0036] The first vibration system 3 can vibrate along a second direction perpendicular to the first direction. The first vibration system 3 may include a diaphragm assembly 31 and a voice coil 32. One end of the voice coil 32 is connected to the diaphragm assembly 31, and the other end of the voice coil 32 is inserted into the magnetic gap 2a. For example, the first direction may be horizontal, and the second direction may be vertical. That is, the voice coil 32 can reciprocate along the vertical direction under the drive of the magnetic field force, thereby driving the diaphragm assembly 31 to vibrate and produce sound, realizing the sound-producing function of the vibration sound-producing device 100. In a specific example of the present invention, the diaphragm assembly 31 may include a diaphragm 311 and a dome 312. The diaphragm 311 is connected to the housing 1 or the magnetic circuit system 2, the dome 312 is disposed on the diaphragm 311, and the end of the voice coil 32 away from the magnetic circuit system 2 is connected to the dome 312.

[0037] like Figures 3-4As shown, the second vibration system 4 can vibrate along the first direction. The second vibration system 4 includes an elastic connector 41 and an oscillator assembly 42. The two ends of the elastic connector 41 can be connected to the oscillator assembly 42 and the inner wall of the housing 1 respectively to suspend the oscillator assembly 42 in the installation space. The oscillator assembly 42 includes a counterweight 421 and a drive coil 422 disposed on the counterweight 421. The drive coil 422 has two connecting edges 4221 arranged opposite to each other. Along the second direction, the two connecting edges 4221 are respectively arranged opposite to two adjacent first sub-center magnets 211.

[0038] Specifically, since the elastic connector 41 suspends the vibrator assembly 42 within the installation space, when the second vibration system 4 is working, current flows through the drive coil 422. Under the action of the magnetic field force of the magnetic circuit system 2, the drive coil 422 can drive the counterweight 421 to reciprocate along the first direction, thereby generating vibration and realizing the vibration function of the vibration sound generating device 100. Optionally, there can be multiple drive coils 422, which can be spaced out and arranged with the connecting edges 4221 of each drive coil 422 arranged in parallel.

[0039] It is understandable that the magnetic field utilization rate of the central magnetic circuit portion of a loudspeaker is usually low. This invention addresses this by arranging multiple first sub-central magnets 211 spaced apart along a first direction in the central magnetic part 21, and by positioning the two connecting edges 4221 of the drive coil 422 along a second direction opposite to two adjacent first sub-central magnets 211. This allows the portion of the magnetic field in the central magnetic part 21 that has low utilization in the first vibration system 3 to be used as the magnetic field for the second vibration system 4, thereby improving the magnetic field utilization rate of the central magnetic part 21, saving one set of magnetic circuit system 2, reducing production costs, and saving the assembly space occupied by one set of magnetic circuit system 2. This allows for the miniaturization and weight reduction design of the vibration sound-generating device 100. As can be seen from the above analysis, the first vibration system 3 and the second vibration system 4 in this invention share one set of magnetic circuit system 2. Sound generation and vibration functions can be achieved through one set of magnetic circuit system 2, and the structure is simple and compact, meeting the requirements of miniaturization and weight reduction.

[0040] According to the first aspect of the present invention, the vibration sound generating device 100 is provided with a plurality of first sub-central magnets 211 spaced apart along a first direction in the central magnetic part 21, and the two connecting edges 4221 of the drive coil 422 along the second direction are respectively arranged opposite to two adjacent first sub-central magnets 211. In this way, the part of the magnetic field of the central magnetic part 21 with low utilization rate in the first vibration system 3 can be used as the magnetic field of the second vibration system 4, thereby improving the magnetic field utilization rate of the central magnetic part 21, saving a set of magnetic circuit system 2, reducing production costs, and saving the assembly space occupied by a set of magnetic circuit system 2, thereby satisfying the miniaturization and thinning design of the vibration sound generating device 100.

[0041] like Figures 1-4 As shown, according to some embodiments of the present invention, there are at least three first sub-center magnets 211. Two adjacent first sub-center magnets 211 are spaced apart to form a spacer 2b. The number of drive coils 422 is the same as the number of spacers 2b, and the center holes of the drive coils 422 correspond one-to-one with the spacers 2b. Specifically, the drive coils 422 can be flattened, with two connecting edges 4221 located on opposite sides of the center hole. The center hole of the drive coil 422 faces the spacer 2b formed by two adjacent first sub-center magnets 211, and the two connecting edges 4221 are respectively opposite to two adjacent first sub-center magnets 211. Furthermore, the number of drive coils 422 is the same as the number of spacers 2b, ensuring that a drive coil 422 is provided between each pair of adjacent first sub-center magnets 211. Thus, with the above arrangement, each drive coil 422 corresponds to a pair of spaced-apart first sub-center magnets 211, and the first connecting edge 4221 and the second connecting edge 4221 can sufficiently cut the magnetic field lines, thereby improving the vibration effect of the oscillator assembly 42.

[0042] It should be noted that the above-mentioned spacing distribution / spacing setting of the first sub-center magnets 211 can be understood as two adjacent first sub-center magnets 211 being set separately. Along the first direction, the gap between two adjacent first sub-center magnets 211 can be large or small, and can be set according to actual usage requirements.

[0043] Optionally, along the first direction, the gap between two adjacent first sub-center magnets 211 is close to or equal to zero, that is, the width of the gap 2b is close to or equal to zero. In other words, two adjacent first sub-center magnets 211 can be arranged abutting each other. When the gap between two adjacent first sub-center magnets 211 is equal to zero, the gap 1b between them can be a contact surface / point / line between the two adjacent first sub-center magnets 211. It is understood that although two adjacent first sub-center magnets 211 are arranged abutting each other, due to assembly errors and material errors, a small gap (gap 2b) may exist between the two adjacent first sub-center magnets 211. In another specific example of the present invention, along the first direction, the width of the gap 2b can be 0.05mm ± 0.02mm.

[0044] By placing two adjacent first sub-center magnets 211 close together, compared to the case where two adjacent first sub-center magnets 211 have a wider gap, the size and volume of the magnets can be increased, thus providing magnetic field strength.

[0045] Furthermore, since magnets with different magnetization directions are typically assembled separately during assembly, for example, in the case of three first sub-center magnets 211, the two first sub-center magnets 211 located at both ends are first fixed, and then the first sub-center magnet 211 located in the middle position is inserted into the assembly space defined between the two first sub-center magnets 211 located at both ends. Therefore, when adjacent first sub-center magnets 211 are arranged close together, there is no need to precisely position the first sub-center magnet 211 in the middle position, simplifying the assembly process of the central magnetic part 21 and improving assembly efficiency. Furthermore, since the three first sub-center magnets 211 are attached together, during the assembly of the later-installed first sub-center magnets 211, the glue used for fixing will overflow to the periphery of the magnets and then overflow into the tiny gaps between two adjacent first sub-center magnets 211, which can bond the two adjacent first sub-center magnets 211 together. Thus, the three first sub-center magnets 211 can be formed into a bonded whole, which greatly improves the structural strength of the central magnetic part 21. When the product is dropped or collided, the first sub-center magnets 211 are less likely to loosen or fall off.

[0046] like Figures 3-4 As shown, according to some embodiments of the present invention, the side magnet portion 22 may include a side magnet 221. The side magnet 221 and a plurality of first sub-center magnets 211 are all magnetized along a second direction, and the magnetization directions between adjacent side magnets 221 and first sub-center magnets 211, as well as between two adjacent first sub-center magnets 211, are opposite. For example, the second direction may be a vertical direction, that is, the side magnet 221 and a plurality of first sub-center magnets 211 are all magnetized along a vertical direction, the magnetization between adjacent side magnets 221 and first sub-center magnets 211, as well as between one of two adjacent first sub-center magnets 211, is along a top-down direction, and the magnetization between adjacent side magnets 221 and first sub-center magnets 211, as well as between the other of two adjacent first sub-center magnets 211, is along a bottom-up direction. Therefore, through the above-mentioned arrangement, the voice coil 32 can fully cut the magnetic field lines in the magnetic gap 2a formed between the side magnetic part 22 and the central magnetic part 21, and the drive coil 422 can fully cut the magnetic field lines in the interval 2b formed by the two adjacent first sub-central magnets 211, thus ensuring the sound generation and vibration effect of the vibration sound generating device 100.

[0047] like Figures 3-4 As shown, according to some embodiments of the present invention, the central magnetic part 21 further includes a central magnetic guide plate 213. The side of the plurality of first sub-central magnets 211 away from the second vibration system 4 is connected to the central magnetic guide plate 213. The central magnetic guide plate 213 can not only concentrate magnetic field lines, but also assemble the plurality of first sub-central magnets 211 together, which facilitates the installation and fixing of the plurality of first sub-central magnets 211.

[0048] like Figure 3 As shown, according to some embodiments of the present invention, the magnetic circuit system 2 may further include a magnetic yoke 23. The magnetic yoke 23 includes a body portion 231 and a hollow hole 232 provided in the body portion 231. The side magnetic portion 22 and the first sub-central magnets 211 located at both ends are both provided in the body portion 231. Along the second direction, the hollow hole 232 is at least partially opposite to the drive coil 422. Specifically, one end of the plurality of first sub-central magnets 211 can be connected to the central magnetic guide plate 213, and the other end of the first sub-central magnets 211 located at both ends is fixed to the body portion 231. Thus, the magnetic yoke 23 can not only fix the side magnetic portion 22 and the central magnetic portion 21, but also play a role in focusing the magnetism, which can ensure the magnetic field strength corresponding to the first vibration system 3. By providing the hollow hole 232 on the body portion 231, the hollow hole 232 can be opposite to part of the drive coil 422 or opposite to the entire drive coil 422, which can ensure that the drive coil 422 can smoothly cut the magnetic field lines, thereby ensuring the vibration effect of the second vibration system 4.

[0049] Optionally, there can be multiple drive coils 422 and one cutout hole 232. The cutout hole 232 is correspondingly set with multiple drive coils 422, which simplifies the processing procedure of the cutout hole 232 and improves processing efficiency. Optionally, there can be multiple drive coils 422 and multiple cutout holes 232, with multiple cutout holes 232 corresponding one-to-one with multiple drive coils 422. This can relatively reduce the opening area of ​​the magnetic yoke 23, thereby not only improving the structural strength of the magnetic yoke 23, but also improving the magnetic focusing effect of the magnetic yoke 23.

[0050] like Figure 3 As shown, in some embodiments of the present invention, the projections of the other first sub-center magnets 211 between the first sub-center magnets 211 located at both ends along the second direction are all located inside the edge of the hollow hole 232, thereby ensuring the number of magnetic field lines passing through the hollow hole 232, and thus ensuring the vibration effect of the second vibration system 4.

[0051] Furthermore, along the second direction, the other first sub-center magnets 211 located at both ends extend into the hollow hole 232, thereby reducing the distance between the central magnetic part 21 and the drive coil 422, thereby increasing the intensity of the magnetic field lines acting on the drive coil 422, and thus improving the vibration effect of the second vibration system 4.

[0052] The following is for reference. Figure 3 and Figure 5 A detailed description of a vibration-generating sound device 100 according to a specific embodiment of the present invention is provided.

[0053] like Figure 3 and Figure 5 As shown, the vibration sound-generating device 100 includes: a housing 1, a magnetic circuit system 2, a first vibration system 3, and a second vibration system 4.

[0054] The magnetic circuit system 2 is disposed within the installation space defined by the housing 1, and the first vibration system 3 and the second vibration system 4 are respectively disposed on opposite sides of the magnetic circuit system 2. The magnetic circuit system 2 includes a magnetic yoke 23 and a central magnetic part 21 and a side magnetic part 22 disposed on the magnetic yoke 23. The side magnetic part 22 is disposed outside the central magnetic circuit, and the central magnetic part 21 and the side magnetic part 22 are spaced apart to define a magnetic gap 2a. The central magnetic part 21 includes three first sub-central magnets 211 and a central magnetic guide plate 213. The three first sub-central magnets 211 are aligned along a first direction (e.g., ...). Figures 1-7 The first sub-central magnets 211 are spaced apart in the x-direction shown. The end of each first sub-central magnet 211 furthest from the second vibration system 4 is connected to the central magnetic guide plate 213. Adjacent first sub-central magnets 211 are spaced apart to form a spacer portion 2b. The side magnetic portion 22 includes a side magnet 221 and a side magnetic guide plate 222 located on the side of the side magnet 221 furthest from the second vibration system 4. The side magnet 221 and the multiple first sub-central magnets 211 are all magnetized along the second direction, and the magnetization directions between adjacent side magnets 221 and the first sub-central magnets 211, as well as between adjacent first sub-central magnets 211, are opposite. The magnetic yoke 23 includes a body portion 231 and a perforated hole 232 in the body portion 231. The side magnets 221 and the first sub-central magnets 211 located at both ends are located in the body portion 231 and are magnetized along the second direction (e.g., x-direction). Figures 1-7 (as shown in the z direction), the first sub-center magnet 211, located in the middle position, extends into the hollow hole 232.

[0055] The first vibration system 3 vibrates along a second direction. The first vibration system 3 includes a diaphragm assembly 31 and a voice coil 32. The diaphragm assembly 31 includes a diaphragm 311 and a dome 312 disposed on the diaphragm 311. One end of the voice coil 32 is fixed to the dome 312, and the other end of the voice coil 32 is inserted into the magnetic gap 2a. The side magnetic plate 222 includes a horizontally extending first plate 2221 and a vertically extending second plate 2222. The first plate 2221 is disposed on the side of the side magnet 221 away from the second vibration system 4. One end of the second plate 2222 is connected to the first plate 2221, and the other end of the second plate 2222 extends along the second direction. Both ends of the diaphragm 311 are fixed to the second plate 2222. The folded portion of the diaphragm 311 extends along the second direction towards the side magnet 22. The first plate 2221 has a recess 222a corresponding to the folded portion.

[0056] The second vibration system 4 vibrates along the first direction. The second vibration system 4 includes an elastic connector 41 and an oscillator assembly 42. The two ends of the elastic connector 41 can be connected to the oscillator assembly 42 and the inner wall of the housing 1 respectively to suspend the oscillator assembly 42 in the installation space. The oscillator assembly 42 includes a counterweight 421 and two drive coils 422 disposed on the counterweight 421. Each drive coil 422 has two connecting edges 4221 arranged opposite to each other. Along the second direction, the two connecting edges 4221 are respectively arranged opposite to two adjacent first sub-center magnets 211.

[0057] Specifically, when the vibration sound-generating device 100 is working, the voice coil 32 moves by cutting the magnetic field lines within the magnetic gap 2a, thereby driving the diaphragm assembly 31 to vibrate and produce sound. When the drive coil 422 is energized, it moves by cutting the magnetic field lines within the interval 2b, thereby driving the oscillator assembly 42 to reciprocate, thus generating a vibration sensation.

[0058] like Figure 1 and Figure 7 As shown, according to some embodiments of the present invention, the central magnetic part 21 may further include a central magnetic guide plate 213. The side of the plurality of first sub-central magnets 211 away from the second vibration system 4 is connected to the central magnetic guide plate 213. The magnetic circuit system 2 also includes a magnetic guide yoke 23. The magnetic guide yoke 23 includes a body part 231 and a hollow hole 232 provided in the body part 231. The central magnetic guide plate 213 may include a support part 2131 and an extension part 2132 provided outside the support part 2131. The extension part 2132 extends along the second direction. The two ends of the extension part 2132 are respectively connected to the support part 2131 and the body part 231. The support part 2131 and the hollow hole 232 are arranged opposite to each other. The plurality of first sub-central magnets 211 are all fixed to the support part 2131.

[0059] Specifically, the central magnetic guide plate 213 not only serves to concentrate magnetic field lines but also assembles multiple first sub-central magnets 211 together. The central magnetic guide plate 213 includes a support portion 2131 extending in a first direction and an extension portion 2132 extending in a second direction. One end of each of the multiple first sub-central magnets 211 can be connected to the support portion 2131. The two ends of the extension portion 2132 are respectively connected to the support portion 2131 and the extension portion 2132, thus the magnetic guide yoke 23 can support the central magnetic portion 21 through the extension portion 2132. A perforated hole 232 is provided on the body portion 231 of the magnetic guide yoke 23. The other end of each of the multiple first sub-central magnets 211 can face the perforated hole 232. The perforated hole 232 can face either a portion of the drive coil 422 or the entire drive coil 422, thereby ensuring that the drive coil 422 can smoothly cut the magnetic field lines, thus ensuring the vibration effect of the second vibration system 4.

[0060] like Figure 1 and Figure 7 As shown, in some embodiments of the present invention, along a third direction perpendicular to the first and second directions respectively, the extension portion 2132 is located on opposite sides of the support portion 2131, and the side magnetic portion 22 is spaced apart from the extension portion 2132 to define a portion of the magnetic gap 2a. Specifically, the first direction and the third direction can be located in the same horizontal plane. For example, the first direction can be the horizontal x-direction, the third direction can be the horizontal y-direction, and the second direction can be the vertical z-direction. There can be two extension portions 2132, which can be located on both sides of the third direction of the support portion 2131, thereby connecting the support portion 2131 and the magnetic yoke 23 together, resulting in a relatively simple structural design. The side magnetic portion 22 can be spaced apart from the extension portion 2132 to define a portion of the magnetic gap 2a, and the side magnetic portion 22 can also be spaced apart from the first sub-center magnet 211 and the central magnetic plate 213 located at both ends to define another portion of the magnetic gap 2a.

[0061] In some embodiments of the present invention, the projections of the plurality of first sub-central magnets 211 along the second direction are all located inside the edge of the hollow hole 232, thereby ensuring the number of magnetic field lines passing through the hollow hole 232, and thus ensuring the vibration effect of the second vibration system 4.

[0062] Furthermore, along the second direction, multiple first sub-central magnets 211 extend into the hollow hole 232, thereby reducing the distance between the central magnetic part 21 and the drive coil 422, thereby increasing the intensity of the magnetic field lines acting on the drive coil 422, and thus improving the vibration effect of the second vibration system 4.

[0063] The following is for reference. Figure 1 , Figure 4 and Figure 7 A detailed description of a vibration-generating sound device 100 according to a specific embodiment of the present invention is provided.

[0064] like Figure 1 , Figure 4 and Figure 7 As shown, the vibration sound-generating device 100 includes: a housing 1, a magnetic circuit system 2, a first vibration system 3, and a second vibration system 4.

[0065] The magnetic circuit system 2 is disposed within the installation space defined by the housing 1, and the first vibration system 3 and the second vibration system 4 are respectively disposed on opposite sides of the magnetic circuit system 2. The magnetic circuit system 2 includes a magnetic yoke 23 and a central magnetic part 21 and a side magnetic part 22 disposed on the magnetic yoke 23. The side magnetic part 22 is disposed outside the central magnetic circuit, and the central magnetic part 21 and the side magnetic part 22 are spaced apart to define a magnetic gap 2a.

[0066] The central magnetic section 21 includes three first sub-central magnets 211 and a central magnetic guide plate 213, the central magnetic guide plate 213 including a magnetic guide plate along a first direction (e.g., ...). Figures 1-7 The support portion 2131 extends in the x-direction (as shown) and along the second direction (e.g.) Figures 1-7 The extension portion 2132 extends in the z-direction (as shown). Both ends of the extension portion 2132 are connected to the support portion 2131 and the extension portion 2132, respectively. There are two extension portions 2132, located in a third direction (e.g., the support portion 2131) of the support portion 2131. Figures 1-7 The two ends of the first sub-center magnet 211 are shown in the y-direction. Three first sub-center magnets 211 are spaced apart along the first direction. The end of each first sub-center magnet 211 away from the second vibration system 4 is connected to the support portion 2131. Adjacent first sub-center magnets 211 are spaced apart to form a spacer portion 2b. The side magnet portion 22 includes a side magnet 221 and a side magnetic guide plate 222 disposed on the side of the side magnet 221 away from the second vibration system 4. The side magnet 221 and the multiple first sub-center magnets 211 are all magnetized along the second direction, and the magnetization directions between adjacent side magnets 221 and the first sub-center magnets 211, as well as between two adjacent first sub-center magnets 211, are opposite. The magnetic yoke 23 includes a body portion 231 and a hollow hole 232 disposed in the body portion 231. The side magnet 221 is disposed in the body portion 231, and the two ends of the extension portion 2132 are connected to the support portion 2131 and the body portion 231, respectively. Along the second direction, the multiple first sub-center magnets 211 are opposite to the hollow hole 232.

[0067] The first vibration system 3 vibrates along a second direction. The first vibration system 3 includes a diaphragm assembly 31 and a voice coil 32. The diaphragm assembly 31 includes a diaphragm 311 and a dome 312 disposed on the diaphragm 311. One end of the voice coil 32 is fixed to the dome 312, and the other end of the voice coil 32 is inserted into the magnetic gap 2a. The side magnetic plate 222 includes a horizontally extending first plate 2221 and a vertically extending second plate 2222. The first plate 2221 is disposed on the side of the side magnet 221 away from the second vibration system 4. One end of the second plate 2222 is connected to the first plate 2221, and the other end of the second plate 2222 extends along the second direction. Both ends of the diaphragm 311 are fixed to the second plate 2222. The folded portion of the diaphragm 311 extends along the second direction towards the side magnet 22. The first plate 2221 has a recess 222a corresponding to the folded portion.

[0068] The second vibration system 4 vibrates along the first direction. The second vibration system 4 includes an elastic connector 41 and an oscillator assembly 42. The two ends of the elastic connector 41 can be connected to the oscillator assembly 42 and the inner wall of the housing 1 respectively to suspend the oscillator assembly 42 in the installation space. The oscillator assembly 42 includes a counterweight 421 and two drive coils 422 disposed on the counterweight 421. The two drive coils 422 are spaced apart along the first direction. Each drive coil 422 has two connecting edges 4221 arranged opposite to each other. Along the second direction, the two connecting edges 4221 are respectively arranged opposite to two adjacent first sub-center magnets 211.

[0069] Specifically, when the vibration sound-generating device 100 is working, the voice coil 32 moves by cutting the magnetic field lines within the magnetic gap 2a, thereby driving the diaphragm assembly 31 to vibrate and produce sound. When the drive coil 422 is energized, it moves by cutting the magnetic field lines within the interval 2b, thereby driving the oscillator assembly 42 to reciprocate, thus generating a vibration sensation.

[0070] like Figure 2 and Figure 6 As shown, according to some embodiments of the present invention, the side magnetic part 22 may include a side magnet 221, and the central magnetic part 21 may also include a second sub-central magnet 212 disposed on both sides of a third direction of a plurality of first sub-central magnets 211. The third direction is perpendicular to the first direction and the second direction, respectively. The side magnet 221, the first sub-central magnet 211 and the second sub-central magnet 212 are all magnetized along the second direction. Along the first direction, the magnetization directions between adjacent side magnets 221 and the first sub-central magnet 211 and between two adjacent first sub-central magnets 211 are opposite. Along the third direction, the magnetization directions between adjacent side magnets 221 and the second sub-central magnet 212 are opposite.

[0071] Specifically, the first direction and the third direction can be located in the same horizontal plane. For example, the first direction can be the horizontal x-direction, the third direction can be the horizontal y-direction, and the second direction can be the vertical z-direction. The central magnetic part 21 includes a plurality of first sub-central magnets 211 spaced apart along the first direction and second sub-central magnets 212 spaced apart along the second direction. The side magnets 221, the first sub-central magnets 211, and the second sub-central magnets 212 are all magnetized along the second direction, for example, the vertical z-direction. Along the first direction, adjacent side magnets 221 and first sub-central magnets 211, as well as one of two adjacent first sub-central magnets 211, are magnetized in a downward direction, while adjacent side magnets 221 and one of two adjacent first sub-central magnets 211 are magnetized in a downward direction. Along the third direction, one of the adjacent side magnet 221 and the second sub-center magnet 212 is magnetized in a downward direction, and the other of the adjacent side magnet 221 and the second sub-center magnet 212 is magnetized in a downward direction.

[0072] Therefore, through the above-mentioned arrangement, the voice coil 32 can fully cut the magnetic field lines in the magnetic gap 2a formed between the side magnetic part 22 and the central magnetic part 21, and the drive coil 422 can fully cut the magnetic field lines in the interval 2b formed by the two adjacent first sub-central magnets 211, thus ensuring the sound generation and vibration effect of the vibration sound generating device 100.

[0073] like Figure 6 As shown, in some embodiments of the present invention, the central magnetic part 21 further includes a central magnetic guide plate 213. The sides of the plurality of first sub-central magnets 211 and second sub-central magnets 212 away from the second vibration system 4 are all connected to the central magnetic guide plate 213. The magnetic circuit system 2 further includes a magnetic guide yoke 23. The magnetic guide yoke 23 includes a body part 231 and a hollow hole 232 provided in the body part 231. The side magnets 221 and the second sub-central magnets 212 are both provided in the body part 231. Along the second direction, the hollow hole 232 is at least partially opposite to the drive coil 422.

[0074] Specifically, the central magnetic plate 213 not only concentrates magnetic field lines but also assembles multiple first sub-central magnets 211 and second sub-central magnets 212 together. The side magnets 221 and second sub-central magnets 212 can both be fixed to the body 231 of the magnetic yoke 23. This allows the magnetic yoke 23 to support the central magnetic part 21 and the side magnetic part 22, while also concentrating the magnetism to ensure the magnetic field strength of the corresponding first vibration system 3. The body 231 of the magnetic yoke 23 has a perforated hole 232, which can be opposite to a portion of the drive coil 422 or the entire drive coil 422. This ensures that the drive coil 422 can smoothly cut the magnetic field lines, thereby ensuring the vibration effect of the second vibration system 4.

[0075] In some embodiments of the present invention, the projections of the plurality of first sub-central magnets 211 along the second direction can all be located inside the edge of the hollow hole 232, thereby ensuring the number of magnetic field lines passing through the hollow hole 232, and thus ensuring the vibration effect of the second vibration system 4.

[0076] Furthermore, along the second direction, multiple first sub-central magnets 211 extend into the hollow hole 232, thereby reducing the distance between the central magnetic part 21 and the drive coil 422, thereby increasing the intensity of the magnetic field lines acting on the drive coil 422, and thus improving the vibration effect of the second vibration system 4.

[0077] Furthermore, there can be multiple drive coils 422 and one cutout hole 232. The cutout hole 232 is set in correspondence with multiple drive coils 422, which simplifies the processing procedure of the cutout hole 232 and improves processing efficiency. Of course, there can also be multiple drive coils 422 and multiple cutout holes 232, with multiple cutout holes 232 corresponding one-to-one with multiple drive coils 422. This can relatively reduce the opening area of ​​the magnetic yoke 23, thereby improving the magnetic focusing effect and structural strength of the magnetic yoke 23.

[0078] The following is for reference. Figure 2 , Figure 4 and Figure 6 A detailed description of a vibration-generating sound device 100 according to a specific embodiment of the present invention is provided.

[0079] like Figure 2 , Figure 4 and Figure 6 As shown, the vibration sound-generating device 100 includes: a housing 1, a magnetic circuit system 2, a first vibration system 3, and a second vibration system 4.

[0080] The magnetic circuit system 2 is disposed within the installation space defined by the housing 1, and the first vibration system 3 and the second vibration system 4 are respectively disposed on opposite sides of the magnetic circuit system 2. The magnetic circuit system 2 includes a magnetic yoke 23 and a central magnetic part 21 and a side magnetic part 22 disposed on the magnetic yoke 23. The side magnetic part 22 is disposed outside the central magnetic circuit, and the central magnetic part 21 and the side magnetic part 22 are spaced apart to define a magnetic gap 2a.

[0081] The central magnetic section 21 includes three first sub-central magnets 211, two second sub-central magnets 212, and a central magnetic guide plate 213. The three first sub-central magnets 211 are arranged along a first direction (e.g., Figures 1-7 The two second sub-central magnets 212 are arranged at intervals in the x-direction shown, and are located in the third direction (e.g., in the x-direction shown) of the three first sub-central magnets 211. Figures 1-7 On both sides of the second vibration system 4 (as shown in the y-direction), the ends of each first sub-central magnet 211 and second sub-central magnet 212 away from the second vibration system 4 are connected to the support portion 2131, and adjacent first sub-central magnets 211 are spaced apart to form a gap portion 2b. The side magnetic portion 22 includes a side magnet 221 and a side magnetic guide plate 222 disposed on the side of the side magnet 221 away from the second vibration system 4. The magnetic guide yoke 23 includes a body portion 231 and a hollow hole 232 disposed in the body portion 231. The side magnet 221 and the second sub-central magnet 212 are both disposed in the body portion 231. Along the second direction (as shown in the y-direction), Figures 1-7 (As shown in the z-direction), multiple first sub-center magnets 211 are opposite to the hollow hole 232. Among them, the side magnets 221, the first sub-center magnets 211 and the second sub-center magnets 212 are all magnetized along the second direction. Along the first direction, the magnetization directions between adjacent side magnets 221 and the first sub-center magnets 211, as well as between two adjacent first sub-center magnets 211, are opposite. Along the third direction, the magnetization directions between adjacent side magnets 221 and the second sub-center magnets 212 are opposite.

[0082] The two adjacent first sub-central magnets 211 and the adjacent first sub-central magnet 211 and second sub-central magnet 212 are arranged in close contact. It is understood that although the two adjacent first sub-central magnets 211 and the adjacent first sub-central magnet 211 and second sub-central magnet 212 are arranged in close contact, due to assembly errors and material errors, there may be a small gap between the two adjacent first sub-central magnets 211 and the adjacent first sub-central magnet 212. For example, along the second direction, the gap width between the two adjacent first sub-central magnets 211 can be 0.05mm ± 0.02mm; along the third direction, the gap width between the two adjacent first sub-central magnets 211 and second sub-central magnet 212 can be 0.05mm ± 0.02mm.

[0083] Specifically, when assembling the central magnetic part 21, the two first sub-central magnets 211 located at both ends of the second direction and the two second sub-central magnets 212 located at both ends of the third direction can be fixed firstly. Then, the first sub-central magnet 211 located in the middle position is inserted into the assembly space defined by the two first sub-central magnets 211 and the two second sub-central magnets 212. Thus, when adjacent first sub-central magnets 211 and adjacent first sub-central magnets 211 and second sub-central magnets 212 are all abutted, there is no need to precisely position the first sub-central magnet 211 in the middle position, simplifying the assembly process of the central magnetic part 21 and improving assembly efficiency. Furthermore, since all five magnets are attached in pairs, during the assembly of the later-installed first sub-center magnet 211, the glue used for fixing will overflow to the periphery of the magnet, and then overflow into the tiny gaps between the two adjacent first sub-center magnets 211 and the adjacent first sub-center magnets 211 and second sub-center magnets 212. This will bond the two adjacent first sub-center magnets 211 and the adjacent first sub-center magnets 211 and second sub-center magnets 212 together. Thus, the three first sub-center magnets 211 and the two second sub-center magnets 212 can be formed into a bonded whole, which greatly improves the structural strength of the central magnetic part 21. When the product is dropped or collided, the first sub-center magnets 211 and second sub-center magnets 212 are less likely to loosen or fall off.

[0084] The first vibration system 3 vibrates along a second direction. The first vibration system 3 includes a diaphragm assembly 31 and a voice coil 32. The diaphragm assembly 31 includes a diaphragm 311 and a dome 312 disposed on the diaphragm 311. One end of the voice coil 32 is fixed to the dome 312, and the other end of the voice coil 32 is inserted into the magnetic gap 2a. The side magnetic plate 222 includes a horizontally extending first plate 2221 and a vertically extending second plate 2222. The first plate 2221 is disposed on the side of the side magnet 221 away from the second vibration system 4. One end of the second plate 2222 is connected to the first plate 2221, and the other end of the second plate 2222 extends along the second direction. Both ends of the diaphragm 311 are fixed to the second plate 2222. The folded portion of the diaphragm 311 extends along the second direction towards the side magnet 22. The first plate 2221 has a recess 222a corresponding to the folded portion.

[0085] The second vibration system 4 vibrates along the first direction. The second vibration system 4 includes an elastic connector 41 and an oscillator assembly 42. The two ends of the elastic connector 41 can be connected to the oscillator assembly 42 and the inner wall of the housing 1 respectively to suspend the oscillator assembly 42 in the installation space. The oscillator assembly 42 includes a counterweight 421 and two drive coils 422 disposed on the counterweight 421. The two drive coils 422 are spaced apart along the first direction. Each drive coil 422 has two connecting edges 4221 arranged opposite to each other. Along the second direction, the two connecting edges 4221 are respectively arranged opposite to two adjacent first sub-center magnets 211.

[0086] Specifically, when the vibration sound-generating device 100 is working, the voice coil 32 moves by cutting the magnetic field lines within the magnetic gap 2a, thereby driving the diaphragm assembly 31 to vibrate and produce sound. When the drive coil 422 is energized, it moves by cutting the magnetic field lines within the interval 2b, thereby driving the oscillator assembly 42 to reciprocate, thus generating a vibration sensation.

[0087] like Figures 1-2 As shown, according to some embodiments of the present invention, the counterweight 421 has a mounting groove 421a on the side near the magnetic circuit system 2, and the drive coil 422 is embedded in the mounting groove 421a, thereby making the structure of the oscillator assembly 42 more compact. Optionally, a fixing adhesive can be provided in the mounting groove 421a, and the drive coil 422 can be fixed in the mounting groove 421a by the fixing adhesive. It should be noted that the structural design of the counterweight 421 is not limited to this. For example, the counterweight 421 may not have a mounting groove 421a, and the drive coil 422 may be bonded to the outer surface of the counterweight 421.

[0088] An electronic device according to a second aspect embodiment of the present invention includes a vibration-generating sound device 100 according to the above-described embodiment of the present invention. Optionally, the electronic device may be a mobile phone, a tablet computer, a laptop computer, etc.

[0089] According to the second aspect of the present invention, the electronic device is provided with the above-mentioned vibration sound generating device 100. The vibration sound generating device 100 has a compact structural design, occupies little assembly space, and has good sound generation and vibration effects. This can meet the requirements of the thin and light design of electronic devices, and also enable electronic devices to have both good sound quality and vibration feedback effects, thereby enhancing the product market competitiveness of electronic devices.

[0090] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0091] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration-generating sound device, characterized in that, include: A housing, within which an installation space is defined; A magnetic circuit system, the magnetic circuit system including a central magnetic part and a side magnetic part outside the central magnetic part, the central magnetic part and the side magnetic part being spaced apart to define a magnetic gap, the central magnetic part including a plurality of first sub-central magnets spaced apart along a first direction, the magnetization directions of two adjacent first sub-central magnets being opposite; A first vibration system and a second vibration system are respectively disposed on opposite sides of the magnetic circuit system. The first vibration system vibrates along a second direction perpendicular to the first direction. The first vibration system includes a diaphragm assembly and a voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is inserted into the magnetic gap. The second vibration system vibrates along the first direction. The second vibration system includes an elastic connector and a vibrator assembly. Both ends of the elastic connector are respectively connected to the vibrator assembly and the inner wall of the housing to suspend the vibrator assembly in the installation space. The vibrator assembly includes a counterweight and a drive coil disposed on the counterweight. The drive coil has two connecting edges arranged opposite to each other. Along the second direction, the two connecting edges are respectively arranged opposite to two adjacent first sub-center magnets. The magnetic circuit system further includes a magnetic yoke, which includes a body and a hollow hole in the body. The side magnetic part and the first sub-center magnet located at both ends are both located in the body. Along the second direction, the hollow hole is at least partially opposite to the drive coil.

2. The vibration-generating sound device according to claim 1, characterized in that, There are at least three first sub-center magnets, and two adjacent first sub-center magnets are spaced apart to form a spacer. The number of drive coils is the same as the number of spacers, and the center hole of each drive coil corresponds to one of the spacers.

3. The vibration-generating sound device according to claim 1, characterized in that, The side magnet section includes a side magnet, and the side magnet and a plurality of first sub-center magnets are all magnetized along the second direction, and the magnetization directions between adjacent side magnets and first sub-center magnets and between two adjacent first sub-center magnets are opposite.

4. The vibration-generating sound device according to claim 1, characterized in that, The central magnetic part also includes a central magnetic guide plate, and the side of each of the plurality of first sub-central magnets away from the second vibration system is connected to the central magnetic guide plate.

5. The vibration-generating sound device according to claim 1, characterized in that, The projections of the other first sub-center magnets between the first sub-center magnets located at both ends along the second direction are all located inside the edge of the hollow hole.

6. The vibration-generating sound device according to claim 5, characterized in that, Along the second direction, the other first sub-center magnets located at both ends extend into the hollow hole.

7. The vibration-generating sound device according to claim 1, characterized in that, A portion of the first sub-center magnet located at both ends is disposed on the main body, and the other portion of the first sub-center magnet is disposed opposite to the hollow hole.

8. The vibration-generating sound device according to any one of claims 1-7, characterized in that, There are multiple drive coils. There is one hollow hole, and the hollow hole is correspondingly arranged with multiple driving coils; Alternatively, multiple hollow holes may be provided, with each hollow hole corresponding to one of the multiple drive coils.

9. The vibration-generating sound device according to claim 1 or 2, characterized in that, Along the first direction, the gap between two adjacent first sub-center magnets is close to zero or equal to zero.

10. An electronic device, characterized in that, Includes the vibration-generating sound device according to any one of claims 1-9.

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