CN220342469U

CN220342469U - Transduction device, movement module and electronic equipment

Info

Publication number: CN220342469U
Application number: CN202321008173.9U
Authority: CN
Inventors: 付峻江
Original assignee: Shenzhen Voxtech Co Ltd
Current assignee: Shenzhen Voxtech Co Ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2024-01-12
Anticipated expiration: 2033-04-27

Abstract

The application mainly relates to a transduction device, a core module and electronic equipment, the transduction device comprises a first coil and a magnet assembly, and a first vibration transmitting piece connected with the first coil and the magnet assembly, the magnet assembly surrounds the periphery of the first coil, the magnet assembly and the first coil are spaced in the radial direction of the transduction device and at least partially overlap in the axial direction of the transduction device, in the working state of the transduction device for inputting a first excitation signal, the electrified first coil generates a first ampere force which enables the first coil and the magnet assembly to move relatively in a magnetic field formed by the magnet assembly, structural components such as an iron core and a magnetic conducting plate are not needed, the weight of the iron core and the magnetic conducting plate is saved, the sensitivity of the transduction device is improved, the frequency response curve of the transduction device is flat in a high frequency band (for example, the frequency is more than or equal to 5 kHz), and the resonance peak in a low frequency band can deviate in a frequency band, for example, the peak resonance frequency of the low frequency resonance peak is less than or equal to 500Hz.

Description

Transduction device, movement module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a transduction device, a core module and the electronic equipment.

Background

With the continuous popularization of electronic devices, the electronic devices have become indispensable social and entertainment tools in daily life, and the requirements of people on the electronic devices are also increasing. The electronic equipment such as the earphone is widely applied to daily life of people, and can be matched with terminal equipment such as a mobile phone, a computer and the like for use so as to provide hearing feast for users.

Disclosure of Invention

The embodiment of the application provides a transduction device, which comprises a first coil, a magnet assembly and a first vibration transmission sheet connected with the first coil and the magnet assembly, wherein the magnet assembly surrounds the periphery of the first coil, the magnet assembly and the first coil are spaced in the radial direction of the transduction device and at least partially overlap in the axial direction of the transduction device, and in the working state of the transduction device for inputting an excitation signal, the energized first coil generates a first ampere force which enables the first coil and the magnet assembly to move relatively in a magnetic field formed by the magnet assembly.

In some embodiments, the inner side of the first coil is not provided with a hard magnet.

In some embodiments, the transduction device includes a first magnetically permeable member, the first coil surrounding a periphery of the first magnetically permeable member, the first magnetically permeable member at least partially overlapping the magnet assembly in an axial direction.

In some embodiments, a ratio between a dimension of the first magnetically permeable member in the axial direction and a dimension of the first coil in the axial direction is greater than or equal to 1.

In some embodiments, the first magnetically permeable member is configured as a hollow structure.

In some embodiments, the ratio between the radial dimension of the first magnetically permeable member and the radial dimension of the first coil is between 0.5 and 1.5.

In some embodiments, the first magnetically permeable member is disposed in a relatively fixed relationship with the magnet assembly, at least a portion of the first magnetically permeable member being radially spaced from the first coil.

In some embodiments, the first magnetically permeable member includes a first body portion and a first extension portion coupled to the first body portion, the first coil surrounding the periphery of the first body portion and radially spaced from the first body portion, the first extension portion coupled to the magnet assembly and axially spaced from the first coil.

In some embodiments, the first vibration-transmitting plate includes an inner ring fixing portion and an outer ring fixing portion nested with each other, and a plurality of radial portions connecting the inner ring fixing portion and the outer ring fixing portion, the outer ring fixing portion being connected with the magnet assembly, the transduction device including a bracket connected with the first coil, the inner ring fixing portion being connected with a central region of the bracket, or the inner ring fixing portion being connected with an edge region of the bracket.

In some embodiments, the first magnetically permeable member and the first coil are arranged to remain relatively fixed, and an orthographic projection of the first magnetically permeable member on a reference plane perpendicular to the axial direction does not overlap with an orthographic projection of the magnet assembly on the reference plane.

In some embodiments, the orthographic projections of the first coil, the magnet assembly, and the first magnetically permeable member in the radial direction at least partially overlap, and the radial spacing of the region where the first magnetically permeable member and the magnet assembly overlap is less than or equal to 1.5 times the minimum spacing between the first magnetically permeable member and the magnet assembly.

In some embodiments, the first coil is radially spaced from the first magnetically permeable member less than the first coil is radially spaced from the magnet assembly.

In some embodiments, the first vibration-transmitting plate includes an inner ring fixing portion and an outer ring fixing portion nested with each other, and a plurality of radial portions connecting the inner ring fixing portion and the outer ring fixing portion, the outer ring fixing portion being connected with the magnet assembly, the inner ring fixing portion being connected with the first magnetic conductive member.

In some embodiments, the first vibration-transmitting plate includes an inner ring fixing portion and an outer ring fixing portion nested with each other, and a plurality of radial portions connecting the inner ring fixing portion and the outer ring fixing portion, the outer ring fixing portion being connected with the magnet assembly, the transduction device including a bracket connected with the first magnetic conductive member, the inner ring fixing portion being connected with a central region of the bracket, or the inner ring fixing portion being connected with an edge region of the bracket.

In some embodiments, the support comprises two end covers which are arranged at intervals in the axial direction, and the two end covers are respectively connected with two ends of the first magnetic conduction piece in the axial direction one by one.

In some embodiments, at least a portion of the first magnetically permeable member is made of a hard magnetic material.

In some embodiments, the number of the first vibration-transmitting pieces is two, and the two first vibration-transmitting pieces are respectively located on two opposite sides of the first coil in the axial direction.

In some embodiments, the first vibration transmitting sheet includes an inner ring fixing portion and an outer ring fixing portion nested with each other, and a plurality of spoke portions connecting the inner ring fixing portion and the outer ring fixing portion, each of the spoke portions being spirally extended from the inner ring fixing portion toward the outer ring fixing portion, and a spiral direction of the spoke portion of one of the first vibration transmitting sheets and a spiral direction of the spoke portion of the other of the first vibration transmitting sheets being opposite to each other as viewed in an axial direction.

In some embodiments, the first magnetic conductive member and the first coil are arranged to be relatively fixed, the first magnetic conductive member includes a first main body portion and a first extension portion connected to the first main body portion, the first coil surrounds a periphery of the first main body portion, the first extension portion is axially spaced from the magnet assembly, an orthographic projection of the first main body portion on a reference plane perpendicular to the axial direction does not overlap with an orthographic projection of the magnet assembly on the reference plane, an orthographic projection of the first extension portion on the reference plane overlaps with an orthographic projection of the magnet assembly on the reference plane, and a distance between the first main body portion and the magnet assembly in a radial direction is smaller than a distance between the first extension portion and the magnet assembly in the axial direction.

In some embodiments, the transduction device includes a buffer member disposed inside the magnet assembly, the buffer member being located on at least one side of the first coil in an axial direction, the buffer member having a larger dimension in a radial direction than the first coil.

In some embodiments, the transduction device includes a first magnetic conductive member, the first coil surrounds a periphery of the first magnetic conductive member, the first magnetic conductive member and the first coil are configured to remain relatively fixed, and the buffer member is fixed on the first magnetic conductive member.

In some embodiments, the magnet assembly comprises a hard magnet, the first coil comprises two first sub-coils arranged at intervals in the axial direction, and the distance between the bisecting surface of the first sub-coils and the end surface of the hard magnet in the axial direction is less than or equal to half of the dimension of the first sub-coils in the axial direction.

In some embodiments, the two first sub-coils are connected in series with each other and are wound in opposite directions.

In some embodiments, the magnet assembly includes two soft magnets connected to the two end faces of the hard magnet one by one, and a distance between the bisecting face of the first sub-coil and the bisecting face of the soft magnet in the axial direction is less than or equal to half of a dimension of the first sub-coil in the axial direction.

The embodiment of the application provides a core module, core module include core casing and above-mentioned transduction device, and transduction device sets up in the holding intracavity of core casing.

In some embodiments, the movement module includes a second vibration-transmitting piece and a vibration panel, the transduction device is suspended in the accommodating cavity by the second vibration-transmitting piece, and the vibration panel is connected with the transduction device.

In some embodiments, the number of the second vibration-transmitting sheets is two, and the two second vibration-transmitting sheets are respectively located on two opposite sides of the transducer device in the axial direction.

In some embodiments, the cartridge housing includes a cylindrical side wall and an end wall, the end wall being connected to one end of the cylindrical side wall such that the other end of the cylindrical side wall is open, and the cartridge module includes an elastic coating connected to the vibration panel, the elastic coating being connected to the other end of the cylindrical side wall.

In some embodiments, the cartridge housing includes a cylindrical side wall, and a first end wall and a second end wall connected to both ends of the cylindrical side wall, respectively, the first end wall being provided with a mounting hole, the transduction device being located between the first end wall and the second end wall, the vibration panel including a main body portion and a connection portion connected with the main body portion, the main body portion being located outside the cartridge housing, the connection portion extending into the cartridge housing via the mounting hole and being connected with the transduction device, an area of the main body portion being larger than an area of the mounting hole, and an area of the mounting hole being larger than an area of the connection portion, as viewed in an axial direction.

In some embodiments, the accommodating cavity is only communicated with the outside of the movement module through a channel, and the channel is a gap between the connecting part and the wall surface of the mounting hole.

The embodiment of the application provides electronic equipment, electronic equipment includes supporting component and above-mentioned core module, and supporting component is connected with the core casing to be used for supporting the core module and wear to wearing the position.

In some embodiments, the electronic device includes a housing coupled to the support assembly, and the deck module is mounted as a module within the housing.

The beneficial effects of this application are: in the transduction device provided by the application, the relative motion of the first coil and the magnet assembly is generated by ampere force generated by the electrified coil in the magnetic field, and structural components such as an iron core and a magnetic conduction plate are not needed, so that the weight of the iron core and the magnetic conduction plate is saved, and the sensitivity of the transduction device is improved. In addition, the frequency response curve of the transducer device is still flat in the high frequency band (for example, the frequency is greater than or equal to 5 kHz), and the resonance peak in the low frequency band can be shifted from the lower frequency band, for example, the peak resonance frequency of the low frequency resonance peak is less than or equal to 500Hz.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a transducer device provided in the present application;

FIG. 2 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 3 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 4 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 5 is a schematic structural view of an embodiment of a first vibration-transmitting sheet provided in the present application;

FIG. 6 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 7 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 8 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 9 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 10 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 11 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 12 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 13 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 14 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 15 is a schematic diagram of an embodiment of a transducer device according to the present disclosure;

FIG. 16 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 17 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 18 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 19 is a schematic view of an embodiment of a transducer device according to the present disclosure;

FIG. 20 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 21 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 22 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 23 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 24 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 25 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 26 is a schematic diagram of an embodiment of a transducer device provided herein;

FIG. 27 is a schematic structural view of an embodiment of a movement module provided in the present application;

FIG. 28 is a schematic structural view of an embodiment of a movement module provided in the present application;

FIG. 29 is a schematic view of an embodiment of a movement module provided in the present application;

FIG. 30 is a schematic structural view of an embodiment of a movement module provided in the present application;

FIG. 31 is a schematic view of an embodiment of a movement module provided in the present application;

FIG. 32 is a schematic diagram of an embodiment of a movement module provided herein;

fig. 33 (a) to (c) are schematic structural views of various embodiments of the electronic device provided in the present application in a wearing state

FIG. 34 is a graph comparing frequency response curves of different embodiments of the transducer device provided herein;

fig. 35 is a graph comparing frequency response curves of different embodiments of the transducer provided in the present application.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustration of the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some, but not all, of the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.

Reference in the present application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

As an example, in connection with fig. 1, a transduction apparatus 10a may include a coil 11a, a magnet assembly 12a, a magnetically permeable cover 13a, a vibration transfer sheet 14a, and a bracket 15a. Wherein, the magnet assembly 12a is fixed at the bottom of the magnetic conductive cover 13a along the axial direction AD of the transducer 10a, and forms a magnetic gap with the magnetic conductive cover 13a in the radial direction RD of the transducer 10a, the bracket 15a is connected with the magnet assembly 12a through the vibration transmission sheet 14a, and the coil 11a is connected with the bracket 15a and extends into the magnetic gap. Further, the magnet assembly 12a may include a hard magnet 121a connected to the bottom of the magnetically permeable cover 13a and a magnetically permeable plate 122a connected to the hard magnet 121 a. The number of the hard magnets 121a and the magnetic conductive plates 122a may be plural, respectively. Based on this, in the operating state in which the transducer 10a inputs the excitation signal, the energized coil 11a generates an ampere force that causes the coil 11a (and the bracket 15 a) and the magnet assembly 12a (and the magnetically conductive cover 13 a) to move relatively in the magnetic field formed by the magnet assembly 12a and the magnetically conductive cover 13a, thereby converting the aforementioned excitation signal into corresponding mechanical vibration.

As an example, in connection with fig. 2, the transduction apparatus 10b may include a coil 11b, a magnet assembly 12b, a core 13b, a vibration-transmitting sheet 14b, and a magnetic conductive plate 15b. The coil 11b may be wound on the iron core 13b, two ends of the iron core 13b may be respectively fixed with a magnetic conductive plate 15b, the magnet assembly 12 surrounds the periphery of the coil 11b and the magnetic conductive plate 15b, and two ends of the iron core 13b may be further connected with the magnet assembly 12b through the vibration transmission sheet 14b respectively; the magnet assembly 12b may include two hard magnets 121b and a magnetically permeable member 122b partially sandwiched between the two hard magnets 121b, the two hard magnets 121b being opposite in polarity. Further, the coil 11b and the magnetic conductive plate 15b are spaced apart from the magnet assembly 12b in the radial direction RD of the transducer 10b, the magnetic conductive plate 15b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) are projected to overlap in the axial direction AD of the transducer 10b, and the distance between the iron core 13b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) in the radial direction RD is larger than the distance between the magnetic conductive plate 15b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) in the axial direction AD. Based on this, in the operating state in which the transducer 10b inputs the excitation signal, the energized coil 11b magnetizes the iron core 13b and the magnetic conductive plate 15b to attract or repel each other with the magnet assembly 12b, so that the coil 11b (and the iron core 13b and the magnetic conductive plate 15 b) and the magnet assembly 12b undergo relative movement, thereby converting the aforementioned excitation signal into corresponding mechanical vibration.

As an example, in connection with fig. 3, the transduction device 10 may include a first coil 11 and a magnet assembly 12, and a first vibration transmitting sheet 13 connecting the first coil 11 and the magnet assembly 12. Wherein the magnet assembly 12 surrounds the periphery of the first coil 11, the magnet assembly 12 is spaced apart from the first coil 11 in the radial direction RD of the transducer device 10 and at least partially overlaps in the axial direction AD of the transducer device 10, i.e. the orthographic projection of the magnet assembly 12 and the first coil 11 on a reference plane perpendicular to the radial direction RD at least partially overlaps. Based on this, in the operating state in which the transduction device 10 inputs the first excitation signal, the energized first coil 11 generates a first ampere force in the magnetic field formed by the magnet assembly 12, which causes the first coil 11 and the magnet assembly 12 to move relatively, thereby converting the aforementioned first excitation signal into corresponding mechanical vibrations. So configured, compared to the solution described in fig. 2, the relative movement of the first coil 11 and the magnet assembly 12 in the present solution is due to the ampere force generated by the energizing coil in the magnetic field, without the structural components such as the iron core 13b and the magnetic conductive plate 15b, so that the weight of the iron core 13b and the magnetic conductive plate 15b is omitted, which is beneficial to improving the sensitivity of the transducer 10. In addition, with reference to fig. 34, compared with the frequency response curve of the technical solution described in fig. 2 (for example, the curve c34_1 in fig. 34), the frequency response curve of the technical solution (for example, the curve c34_2 in fig. 34) is still flat in the high frequency band (for example, the frequency is greater than or equal to 5 kHz), and the resonance peak in the low frequency band may deviate from the frequency band with lower frequency, for example, the peak resonance frequency of the low frequency resonance peak is less than or equal to 500Hz. The former is because, in the case that the length of the wire used to manufacture the coil is fixed, in the technical solution described in fig. 2, since the radial dimension of the coil 11b is smaller, the coil 11b needs to be wound more turns, that is, the number of turns of the coil 11b is larger, so that the structure formed by the coil 11b, the iron core 13b, and the magnetic conductive plate 15b has higher inductance in the high frequency band, resulting in higher impedance in the high frequency band, and further resulting in lower sensitivity in the high frequency band; in the technical scheme, the radial dimension of the first coil 11 is larger, the number of turns of the first coil 11 is smaller, inductance of a high frequency band is reduced, sensitivity of the high frequency band is prevented from being reduced, and a corresponding frequency response curve is flatter in the high frequency band. Further, in the solution described in fig. 2, since the orthographic projection portions of the magnetic conductive plate 15b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) in the axial direction AD are overlapped, the vibration-transmitting sheet 14b needs to avoid direct magnetic adsorption of the magnetic conductive plate 15b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) in the axial direction AD, which results in a larger rigidity of the vibration-transmitting sheet 14b in the axial direction AD and thus a larger peak resonance frequency of the low-frequency resonance peak in the corresponding frequency response curve; in this technical solution, because the working principle of the transducer 10 is different from that of the transducer 10b in fig. 2, so-called magnetic adsorption is not required to be worried about in the axial direction AD, which is beneficial to reducing the rigidity of the first vibration-transmitting sheet 13 in the axial direction AD, so that the peak resonance frequency of the low-frequency resonance peak in the corresponding frequency response curve can be shifted from the frequency band with lower frequency.

In some embodiments, compared to the solution described in fig. 1, the inner side of the first coil 11 may not be provided with a hard magnet, which is advantageous for avoiding leakage sound of the transducer device 10 due to the acoustic cavity effect. In connection with fig. 1, the aforementioned acoustic cavity effect means that, during the movement of the coil 11a relative to the magnet assembly 12a (and the magnetic conductive cover 13 a), the air pressure in the magnetic gap between the magnet assembly 12a and the magnetic conductive cover 13a changes, so as to generate leakage sound.

In some embodiments, the transduction device 10 may include a first bracket 14 connected to the first coil 11 such that the first coil 11 is connected to the first vibration transmitting sheet 13 through the first bracket 14. Wherein the first support 14 may be made of soft magnetic material or plastic material. Thus, compared with the technical solution described in fig. 1, in the present technical solution, the dimension of the first support 14 in the axial direction AD can be made larger, for example, thickened in the direction along the axial direction AD and away from the first vibration transmitting plate 13, and the dimension in the radial direction RD can be made smaller, which is beneficial to improving the rigidity of the first support 14, so that the high-frequency resonance peak of the transducer 10 shifts to a frequency band with higher frequency (for example, greater than 7 kHz), and further improving the high-frequency mode. In addition, the lead wire of the first coil 11 may be fixed to the side of the first bracket 14 facing away from the first vibration-transmitting sheet 13 by a medium such as glue, and even if the glue bulges after curing, it does not interfere with other structural members.

In some embodiments, the transduction device 10 may include a first magnetic conductive member 15, where the first coil 11 surrounds the periphery of the first magnetic conductive member 15, where the first magnetic conductive member 15 at least partially overlaps the magnet assembly 12 in the axial direction AD, that is, where the first magnetic conductive member 15 at least partially overlaps the orthographic projection of the magnet assembly 12 on a reference plane perpendicular to the radial direction RD, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11 more, that is, the leakage flux is reduced, which is beneficial for improving the sensitivity of the transduction device 10.

In some embodiments, the ratio between the dimension of the first magnetically permeable member 15 in the axial direction AD and the dimension of the first coil 11 in the axial direction AD may be greater than or equal to 1. If the dimension of the first magnetic conductive member 15 in the axial direction AD is too small, it is easy to make the magnetic induction lines of the magnetic field generated by the magnet assembly 12 difficult to pass through the first coil 11 more, i.e. more leakage.

In some embodiments, the first magnetic conductive member 15 may be configured as a hollow structure, as compared to the solution described in fig. 2, which is beneficial for reducing leakage sound of the transducer 10 and improving sensitivity of the transducer 10, as will be described later. In addition, with reference to fig. 34, compared with the frequency response curve of the technical solution described in fig. 2 (for example, the curve c34_1 in fig. 34), the frequency response curve of the technical solution (for example, the curve c34_2 in fig. 34) is still flat in the high frequency band (for example, the frequency is greater than or equal to 5 kHz). In the technical solution described in fig. 2, because the iron core 13b is of a solid structure, the structure formed by the coil 11b, the iron core 13b and the magnetic conductive plate 15b has a higher inductance in the high frequency band, which results in a higher impedance in the high frequency band and further results in a decrease in sensitivity in the high frequency band; in this technical scheme, the first magnetic conduction piece 15 is hollow structure, is favorable to reducing the inductance of high frequency channel, avoids the sensitivity of high frequency channel to descend for corresponding frequency response curve is more even at the high frequency channel. Further, the ratio between the dimension of the first magnetic conductive member 15 in the radial direction RD and the dimension of the first coil 11 in the radial direction RD may be between 0.5 and 1.5. When the size of the first coil 11 in the radial direction RD is fixed, if the size of the first magnetic conductive member 15 in the radial direction RD is too small, the structural strength of the first magnetic conductive member 15 is easily insufficient; if the first magnetic conductive member 15 is too large in the radial direction RD, it is easy to cause the inductance of the high frequency band to be large.

In some embodiments, with reference to fig. 4, the first magnetically permeable member 15 and the magnet assembly 12 may be configured to remain relatively fixed, with at least a portion of the first magnetically permeable member 15 being radially RD spaced from the first coil 11. So configured, the first magnetically permeable member 15 can follow the movement of the magnet assembly 12 relative to the first coil 11, which is beneficial for improving the sensitivity of the transducer assembly 10.

In some embodiments, the first magnetic conductive member 15 may include a first body portion 151 and a first extension portion 152 connected to the first body portion 151, and the first extension portion 152 may extend toward an outer side of the first body portion 151 in the radial direction RD. Wherein the first coil 11 surrounds the outer periphery of the first body 151 and is spaced apart from the first body 151 in the radial direction RD, and the first extension 152 is connected to the magnet assembly 12 and is spaced apart from the first coil 11 in the axial direction AD. Further, the first magnetic conductive member 15 may be provided with magnetic conductive capability, for example, the first main body 151 and the first extension 152 are made of soft magnetic material; the first magnetic conductive member 15 may also have a magnetic conductive capability, for example, the first main body 151 and the first outer extension 152 are made of soft magnetic material and plastic material, respectively. The first main body 151 and the first extension 152 may be integrally formed.

In some embodiments, the first body portion 151 may be configured as a hollow structure, which is advantageous not only in reducing the weight of the transducer 10, but also in avoiding leakage sound of the transducer 10 due to the acoustic cavity effect.

In some embodiments, referring to fig. 4 and 5, the first vibration transmitting sheet 13 may include an inner ring fixing portion 131 and an outer ring fixing portion 132 nested with each other, and a plurality of spoke portions 133 connecting the inner ring fixing portion 131 and the outer ring fixing portion 132. Wherein the plurality of radial portions 133 allow the inner ring fixing portion 131 and the outer ring fixing portion 132 to relatively move at least in the axial direction AD by an external force. Further, an outer ring fixing portion 132 may be coupled to the magnet assembly 12, and an inner ring fixing portion 131 may be coupled to a central region of the first bracket 14 to allow the first coil 11 and the magnet assembly 12 to relatively move under an ampere force.

In some embodiments, referring to fig. 6 and 5, the first vibration transmitting sheet 13 may include an inner ring fixing portion 131 and an outer ring fixing portion 132 nested with each other, and a plurality of spoke portions 133 connecting the inner ring fixing portion 131 and the outer ring fixing portion 132. Wherein the plurality of radial portions 133 allow the inner ring fixing portion 131 and the outer ring fixing portion 132 to relatively move at least in the axial direction AD by an external force. Further, the outer ring fixing portion 132 may be coupled to the magnet assembly 12, and the inner ring fixing portion 131 may be coupled to an edge region of the first bracket 14 to allow the first coil 11 and the magnet assembly 12 to relatively move under an ampere force. Notably, are: compared with the technical solution described in fig. 5, the bending degree of the radial portion 133 is smaller in the technical solution, and the probability of stress concentration under the extreme working conditions such as dropping of the transducer 10 is smaller, which is beneficial to improving the reliability of the first vibration transmitting sheet 13. In addition, compared with the technical solution described in fig. 5, in the present technical solution, a safety gap in the axial direction AD is not required to be reserved between the first vibration-transmitting plate 13 and the first bracket 14, which is beneficial to reducing the axial dimension of the transducer device 10.

In some embodiments, referring to fig. 7, the first magnetically permeable member 15 and the first coil 11 may be configured to remain relatively fixed, and the orthographic projection of the first magnetically permeable member 15 on a reference plane perpendicular to the axial direction AD may not overlap with the orthographic projection of the magnet assembly 12 on the same reference plane. So configured, the first magnetic conductive member 15 can move relative to the magnet assembly 12 along with the first coil 11, which is not only beneficial to simplifying the structure of the first magnetic conductive member 15, but also beneficial to further alleviating (or even eliminating) the leakage sound generated by the transducer 10 due to the acoustic cavity effect.

Further, the first magnetic conductive member 15 may be configured as a hollow structure, so that the total weight of the first magnetic conductive member 15 and the first coil 11 is not too large, which is not only beneficial to reducing the weight of the transducer 10, but also beneficial to improving the sensitivity of the transducer 10.

In some embodiments, the orthographic projections of the first coil 11, the magnet assembly 12, and the first magnetically permeable member 15 on a reference plane perpendicular to the radial direction RD may at least partially overlap. The distance between the first magnetic conductive member 15 and the magnet assembly 12 in the radial direction RD may be less than or equal to 1.5 times the minimum distance between the first magnetic conductive member 15 and the magnet assembly 12, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11 more, that is, the magnetic leakage is reduced, which is beneficial to improving the sensitivity of the transduction device 10. Notably, are: in the solution depicted in fig. 2, since the distance between the iron core 13b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) in the radial direction RD is greater than the distance between the magnetic conductive plate 15b and the magnet assembly 12b (specifically, the magnetic conductive member 122 b) in the axial direction AD, the induction line of the magnetic field formed by the magnet assembly 12b will pass through the coil 11b less; whereas in the present solution the induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass more through the first coil 11. Further, in an embodiment such as that shown in fig. 7, the spacing in the radial direction RD of the region where the first magnetically permeable member 15 and the magnet assembly 12 overlap is equal to the minimum spacing between the first magnetically permeable member 15 and the magnet assembly 12.

In some embodiments, the first coil 11 may be spaced from the first magnetically permeable member 15 in the radial direction RD less than the first coil 11 is spaced from the magnet assembly 12 in the radial direction RD, such as by the first coil 11 being wound around the first magnetically permeable member 15. So configured, compared to the solution described in fig. 4, the magnetic gap between the first magnetic conductive member 15 and the magnet assembly 12 in the radial direction RD is smaller in the present solution, which is beneficial for improving the sensitivity of the transduction device 10.

In some embodiments, referring to fig. 8 and 7, the first vibration transmitting sheet 13 may include an inner ring fixing portion 131 and an outer ring fixing portion 132 nested with each other, and a plurality of spoke portions 133 connecting the inner ring fixing portion 131 and the outer ring fixing portion 132. Wherein the plurality of radial portions 133 allow the inner ring fixing portion 131 and the outer ring fixing portion 132 to relatively move at least in the axial direction AD by an external force. Further, the outer ring fixing portion 132 is connected to the magnet assembly 12, and the inner ring fixing portion 131 is connected to the first magnetic conductive member 15 to allow the first coil 11 and the magnet assembly 12 to move relatively under an ampere force. The number of the first vibration transmitting pieces 13 may be two, and the two first vibration transmitting pieces 13 are located on opposite sides of the first coil 11 in the axial direction AD, which is favorable to reducing the risk of magnetic attraction between the first magnetic conductive member 15 and the magnet assembly 12, especially under the extreme working conditions such as falling. Further, each of the spoke portions 133 is spirally extended from the inner ring fixing portion 131 toward the outer ring fixing portion 132, and the spiral direction of the spoke portion 133 of one first vibration transmitting piece 13 and the spiral direction of the spoke portion 133 of the other first vibration transmitting piece 13 are opposite to each other as viewed in the axial direction AD. So arranged, when the first coil 11 and the magnet assembly 12 have a tendency to twist about the axial direction AD, one of the two first vibration transmitting pieces 13 may counteract this tendency to twist, thereby avoiding unnecessary collisions, which is advantageous for further reducing the magnetic gap between the first magnetic conductive member 15 and the magnet assembly 12 in the radial direction RD. Notably, are: in embodiments in which the transduction device 10 comprises a first support 14 connected to a first magnetically permeable member 15, the connection of the inner ring fixing portion 131 to the first magnetically permeable member 15 may also be simply referred to as the connection of the inner ring fixing portion 131 to the edge region of the first support 14.

In some embodiments, referring to fig. 9 and 5, the first vibration transmitting sheet 13 may include an inner ring fixing portion 131 and an outer ring fixing portion 132 nested with each other, and a plurality of spoke portions 133 connecting the inner ring fixing portion 131 and the outer ring fixing portion 132. Wherein the plurality of radial portions 133 allow the inner ring fixing portion 131 and the outer ring fixing portion 132 to relatively move at least in the axial direction AD by an external force. Further, an outer ring fixing portion 132 is connected to the magnet assembly 12, and an inner ring fixing portion 131 is connected to a central region of the first bracket 14 to allow the first coil 11 and the magnet assembly 12 to relatively move under an ampere force.

Further, the first support 14 may include two first end caps 141 disposed at intervals in the axial direction AD, and the two first end caps 141 are respectively connected to two ends of the first magnetic conductive member 15 in the axial direction AD one by one. Similarly, the number of the first vibration-transmitting pieces 13 may be two, and the two first vibration-transmitting pieces 13 are located on opposite sides of the first coil 11 in the axial direction AD. Wherein the inner ring fixing portion 131 of one first vibration transmitting plate 13 is connected to the central region of one first end cap 141, and the inner ring fixing portion 131 of the other first vibration transmitting plate 13 is connected to the central region of the other first end cap 141.

In some embodiments, referring to fig. 10, 5 and 7, the first vibration transmitting sheet 13 may include an inner ring fixing portion 131 and an outer ring fixing portion 132 nested with each other, and a plurality of radial portions 133 connecting the inner ring fixing portion 131 and the outer ring fixing portion 132. Wherein the plurality of radial portions 133 allow the inner ring fixing portion 131 and the outer ring fixing portion 132 to relatively move at least in the axial direction AD by an external force. Further, the number of the first vibration-transmitting pieces 13 may be two, and the two first vibration-transmitting pieces 13 are located on opposite sides of the first coil 11 in the axial direction AD. The outer ring fixing portions 132 of the two first vibration transmitting plates 13 are respectively connected with the magnet assembly 12, the inner ring fixing portion 131 of one first vibration transmitting plate 13 is connected with the central area of the first bracket 14, and the inner ring fixing portion 131 of the other first vibration transmitting plate 13 is connected with the first magnetic conductive member 15 to allow the first coil 11 and the magnet assembly 12 to move relatively under the action of ampere force.

In some embodiments, at least part of the first magnetically permeable member 15 may be made of a hard magnetic material, for example, the first magnetically permeable member 15 includes a hard magnet and a soft magnet stacked in the axial direction AD. So arranged, the first magnetic conductive member 15 can magnetically attract a soft magnetic body such as a nickel steel sheet, a silicon steel sheet, a soft magnetic ferrite, or the like.

In some embodiments, in conjunction with fig. 11, the first magnetically permeable member 15 and the first coil 11 may be configured to remain relatively fixed. The first magnetic conductive member 15 may include a first body portion 151 and a first extension portion 152 connected to the first body portion 151, and the first extension portion 152 may extend toward an outer side of the first body portion 151 in the radial direction RD. Further, the first coil 11 is wound around the outer periphery of the first body portion 151, for example, the first coil 11 is wound around the first body portion 151, and the first extension portion 152 is spaced from the magnet assembly 12 in the axial direction AD. Wherein, the front projection of the first main body 151 on a reference plane perpendicular to the axial direction AD is not overlapped with the front projection of the magnet assembly 12 on the same reference plane, the front projection of the first extension 152 on the same reference plane is overlapped with the front projection of the magnet assembly 12 on the same reference plane, and the distance between the first main body 151 and the magnet assembly 12 in the radial direction RD is smaller than the distance between the first extension 152 and the magnet assembly 12 in the axial direction AD. This arrangement also allows the induction lines of the magnetic field generated by the magnet assembly 12 to be more concentrated and pass through the first coil 11 more, i.e. to reduce leakage, which is beneficial for improving the sensitivity of the transducer 10. Notably, are: unlike the solution described in fig. 2, the power of the relative movement of the first coil 11 and the magnet assembly 12 still results from ampere forces. Similarly, the first body portion 151 may be provided in a hollow structure, and both the first body portion 151 and the first extension portion 152 may be made of a soft magnetic material.

In some embodiments, in connection with fig. 12, the transduction device 10 may include a buffer 16 disposed inside the magnet assembly 12, at least one side of the buffer 16 in the axial direction AD, e.g., opposite sides of the first coil 11 in the axial direction AD are provided with the buffer 16, respectively. The buffer member 16 may be fixed to the magnet assembly 12 or to the first magnetic conductive member 15. Further, the size of the buffer member 16 in the radial direction RD is larger than the size of the first coil 11 in the radial direction RD, which is beneficial to reduce the risk of magnetic attraction between the first magnetic conductive member 15 and the magnet assembly 12, especially under extreme conditions such as falling. Wherein the cushioning member 16 may be made of foam. Notably, are: in embodiments in which the first magnetic conductive member 15 and the first coil 11 are arranged to remain relatively fixed, such as any of the embodiments described in fig. 7 to 11, the buffer member 16 may be adaptively arranged according to actual requirements.

Next, a specific structure of the first coil 11, the magnet assembly 12, and the relationship thereof will be exemplarily described. For convenience of description, the technical solution described in fig. 9 is taken as a basic structure of the transducer device 10. Therefore, after the specific structures and the relationships between the first coil 11 and the magnet assembly 12 are determined, the specific structures and the relationships between other structural components in the transducer device 10, such as the first vibration-transmitting sheet 13, the first bracket 14, the first magnetic conductive member 15, and the buffer member 16, can be adaptively adjusted according to the actual requirements, which are described in detail in any of the embodiments of fig. 3 to 12, and will not be repeated herein.

In some embodiments, in connection with fig. 13, the magnet assembly 12 may comprise one hard magnet 121, and the number of first coils 11 may also be only one, both at least partially overlapping in the axial direction AD, i.e. both at least partially overlapping in the orthographic projection on a reference plane perpendicular to the radial direction RD. In the circumferential direction around the axial direction AD, the hard magnet 121 may be a complete annular structure or may be formed by splicing a plurality of circular arc blocks; in the axial direction AD, the hard magnet 121 may be formed by splicing a plurality of hard magnets having opposite polarities. So configured, since the magnetic field distribution of the hard magnet 121 in the three-dimensional space is not uniform, the magnetic field strength of the magnetic field formed by the magnet assembly 12 is not equal everywhere, for example, the hard magnet 121 has stronger magnetic field strengths at both ends than in the middle in the axial direction AD, and the first coil 11 has a larger portion corresponding exactly to the middle of the hard magnet 121, resulting in a smaller average value of the magnetic field strength B acting on the first coil 11 in the calculation formula F.

In some embodiments, referring to fig. 14, the magnet assembly 12 may include one hard magnet 121, and the first coil 11 may include two first sub-coils 111 spaced apart in the axial direction AD, and the two first sub-coils 111 may be respectively adjacent to both ends of the hard magnet 121. Wherein, the distance between the bisecting plane (e.g., P1 in fig. 14) of the first sub-coil 111 and the end face (e.g., P2 in fig. 14) of the hard magnet 121 in the axial direction AD may be less than or equal to half the size of the first sub-coil 111 in the axial direction AD. Preferably, the bisecting plane (e.g., P1 in fig. 14) of the first sub-coil 111 is coplanar with the end face (e.g., P2 in fig. 14) of the hard magnet 121 in the axial direction AD. So configured, the two first sub-coils 111 may be respectively located at positions with higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is beneficial to improving the average value of the magnetic field strength B, thereby improving the sensitivity of the transducer device 10. Notably, are: the bisecting plane (for example, P1 in fig. 14) of the first sub-coil 111 may refer to a plane where a half of the dimension of the first sub-coil 111 in the axial direction AD is located, or may refer to a plane where a half of the number of turns of the first sub-coil 111 is located, which will not be described in detail.

In some embodiments, the two first sub-coils 111 may be connected in series with each other and wound in opposite directions. So configured, the ampere forces generated by the two first sub-coils 111, respectively, can remain in the same direction. Of course, in other embodiments, the two first sub-coils 111 may also be connected in parallel with each other.

In some embodiments, the magnet assembly 12 may include two soft magnets 122, where the two soft magnets 122 are respectively connected to two end surfaces of the hard magnet 121, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11 more, that is, the magnetic leakage is reduced, which is beneficial to improving the sensitivity of the transduction apparatus 10. Wherein, the distance between the bisecting plane (for example, shown as P1 in fig. 14) of the first sub-coil 111 and the bisecting plane (for example, shown as P3 in fig. 14) of the soft magnetic body 122 in the axial direction AD may be less than or equal to half the size of the first sub-coil 111 in the axial direction AD. Preferably, the bisecting plane (e.g., P1 in fig. 14) of the first sub-coil 111 is coplanar with the bisecting plane (e.g., P3 in fig. 14) of the soft magnetic body 122 in the axial direction AD. So configured, the two first sub-coils 111 may be respectively located at positions with higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is beneficial to improving the average value of the magnetic field strength B, thereby improving the sensitivity of the transducer device 10. Notably, are: the bisecting plane (e.g., P3 in fig. 14) of the soft magnetic body 122 may refer to a plane in which a half of the dimension of the soft magnetic body 122 in the axial direction AD is located, and will not be described in detail.

In some embodiments, in combination with fig. 15 to 17, the magnet assembly 12 may include a plurality of hard magnets 121 arranged in the axial direction AD, for example, two hard magnets 121 shown in fig. 15 and 16, and further, for example, three hard magnets 121 shown in fig. 17, any adjacent two hard magnets 121 are disposed to have the same polarity opposite to each other so that the magnetic field formed by the magnet assembly 12 is as high as possible at the end of any one hard magnet 121. Based on this, the first coil 11 may include at least one first sub-coil 111, for example, one first sub-coil 111 shown in fig. 15, further for example, three first sub-coils 111 shown in fig. 16, further for example, two first sub-coils 111 shown in fig. 17, and at least one of all the first sub-coils 111 may overlap with the adjacent two hard magnets 121 in the axial direction AD, that is, at least one first sub-coil 111 may overlap with the orthographic projection of the adjacent two hard magnets 121 on the reference plane perpendicular to the radial direction RD. So configured, the first sub-coil 111 may be positioned at a location of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer assembly 10.

Further, the magnet assembly 12 may include a plurality of soft magnets 122, and the plurality of soft magnets 122 and the plurality of hard magnets 121 may be alternately arranged in the axial direction AD, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11 more, that is, the leakage flux is reduced, which is advantageous for improving the sensitivity of the transduction apparatus 10.

In some embodiments, in combination with fig. 15, the number of hard magnets 121 may be two, and the first coil 11 may include one first sub-coil 111, where the first sub-coil 111 may overlap with two hard magnets 121 in the axial direction AD, that is, the first sub-coil 111 may overlap with the orthographic projection of two adjacent hard magnets 121 on a reference plane perpendicular to the radial direction RD, so that the first sub-coil 111 is located at a position where the magnetic field strength is higher in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transduction device 10. Similar to the technical solution described in fig. 14, in the present technical solution, the distance between the bisecting plane of the first sub-coil 111 and the bisecting plane of the soft magnet 122 in the axial direction AD may be less than or equal to half the size of the first sub-coil 111 in the axial direction AD. Preferably, the bisecting plane of the first sub-coil 111 is coplanar with the bisecting plane of the soft magnetic body 122 in the axial direction AD. So configured, the two first sub-coils 111 may be respectively located at positions with higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is beneficial to improving the average value of the magnetic field strength B, thereby improving the sensitivity of the transducer device 10. Further, the first vibration-transmitting sheet 13 may be made of a soft magnetic material, that is, the first vibration-transmitting sheet 13 may be magnetically conductive, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11 more, that is, the magnetic leakage is reduced, which is beneficial to improving the sensitivity of the transducer 10. Specifically, with reference to fig. 35, under the same condition, compared with the frequency response curve (for example, the curve c35_1 in fig. 35) of the technical scheme in which the first vibration transmitting plate 13 is not magnetically conductive, in the present technical scheme, since the first vibration transmitting plate 13 can magnetically conductive, the corresponding frequency response curve (for example, the curve c35_2 in fig. 35) is mostly located above the curve c35_2, that is, the transduction device 10 in the present technical scheme has higher sensitivity.

In some embodiments, referring to fig. 16 and 17, the magnet assembly 12 may include a plurality of hard magnets 121 arranged in the axial direction AD, the first coil 11 may include a plurality of first sub-coils 111, and the number of first sub-coils 111 may not be equal to the number of hard magnets 121, such as two hard magnets 121 and three first sub-coils 111 shown in fig. 16, and further such as three hard magnets 121 and two first sub-coils 111 shown in fig. 17. Wherein at least one first sub-coil 111 may overlap with the adjacent two hard magnets 121 in the axial direction AD, i.e. at least one first sub-coil 111 may overlap with the orthographic projection of the adjacent two hard magnets 121 on a reference plane perpendicular to the radial direction RD, such that each first sub-coil 111 is located as much as possible at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer 10. Similar to the technical solution described in fig. 14, in the present technical solution, the distance between the bisecting plane of the first sub-coil 111 and the bisecting plane of the soft magnet 122 in the axial direction AD may be less than or equal to half the size of the first sub-coil 111 in the axial direction AD. Preferably, the bisecting plane of the first sub-coil 111 is coplanar with the bisecting plane of the soft magnetic body 122 in the axial direction AD. So configured, each first sub-coil 111 is located as much as possible at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer device 10. Further, the first vibration-transmitting plate 13 may be made of a soft magnetic material, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11, that is, the magnetic leakage is reduced, which is beneficial to improving the sensitivity of the transduction device 10. Further, the number of the first sub-coils 111 may be smaller than the number of the hard magnets 121, for example, three hard magnets 121 and two first sub-coils 111 as shown in fig. 17, any one first sub-coil 111 may overlap with the adjacent two hard magnets 121 in the axial direction AD, that is, any one first sub-coil 111 may overlap with the orthographic projection of the adjacent two hard magnets 121 on the reference plane perpendicular to the radial direction RD, and the first vibration transmitting sheet 13 may be made of a soft magnetic material, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11, that is, the magnetic leakage is reduced, which is advantageous for improving the sensitivity of the transducer 10.

In some embodiments, the plurality of first sub-coils 111 may be connected in series with each other, and the winding directions of any adjacent two first sub-coils 111 are opposite. So configured, the ampere forces generated by the plurality of first sub-coils 111, respectively, can be maintained in the same direction. Of course, in other embodiments, the two first sub-coils 111 may also be connected in parallel with each other.

In general, the smaller the resistance of the first coil 11, the smaller the partial pressure thereof; the transducer 10 is typically coupled to a corresponding power amplifier having an output efficiency proportional to the size of the load (e.g., the resistance of the first coil 11) coupled thereto. Based on this, if the size of the first coil 11 in the axial direction AD is increased, for example, the first coil 11 is wound several more turns, the average value of the magnetic field strength B is reduced although the resistance of the first coil 11 is increased. Therefore, compared to the number of the first coils 11 being only one or the first coils 11 including one first sub-coil 111, by providing the first coils 11 including a plurality of first sub-coils 111, each first sub-coil 111 is located as high as possible in the magnetic field formed by the magnet assembly 12, not only is it advantageous to increase the resistance of the first coils 11 to increase the output efficiency of the power amplifier, but also it is advantageous to increase the average value of the magnetic field strength B to increase the sensitivity of the transducer 10.

In some embodiments, referring to fig. 18-21, the transduction device 10 may include a second coil 17 surrounding the periphery of the magnet assembly 12, the second coil 17 being spaced apart from the magnet assembly 12 in the radial direction RD and at least partially overlapping in the axial direction AD, i.e. the second coil 17 at least partially overlapping with an orthographic projection of the magnet assembly 12 on a reference plane perpendicular to the radial direction RD. Based on this, in the operating state in which the transduction apparatus 10 inputs the second excitation signal, the energized second coil 17 generates a second ampere force in the magnetic field formed by the magnet assembly 12, which causes the second coil 17 to move relative to the magnet assembly 12, thereby converting the aforementioned second excitation signal into corresponding mechanical vibrations. So arranged, not only is the magnetic field of the inner periphery of the magnet assembly 12 utilized by the first coil 11, but also the magnetic field of the outer periphery of the magnet assembly 12 is utilized by the second coil 17, so that the magnetic field utilization rate of the magnet assembly 12 is higher. Notably, are: in the technical solutions described in fig. 18 to 21, the specific structures and the relationships of the structural components such as the first coil 11, the magnet assembly 12, the first vibration-transmitting sheet 13, the first bracket 14, the first magnetic conductive member 15, and the buffer member 16 may be adaptively adjusted according to actual requirements, and detailed descriptions of any embodiment of fig. 1 to 17 will be omitted herein. For convenience of description, the technical solution described in fig. 8 or fig. 9 is taken as a basic structure of the transducer device 10.

In some embodiments, the first excitation signal and the second excitation signal may be the same, e.g., the second coil 17 and the first coil 11 may be connected in series with each other, so that the second ampere force and the first ampere force may be made to be the same, which is beneficial for improving the sensitivity of the transducer device 10. Wherein, since the direction of the magnetic field of the inner periphery of the magnet assembly 12 and the direction of the magnetic field of the outer periphery of the magnet assembly 12 can be simply regarded as opposite, when the second coil 17 and the first coil 11 are connected in series with each other, the winding directions of the second coil 17 and the first coil 11 can be opposite accordingly. Of course, in other embodiments, the second coil 17 and the first coil 11 may be connected in parallel with each other.

In some embodiments, the first excitation signal and the second excitation signal may be different. This arrangement is advantageous for widening the application scenarios of the transducer device 10, such as the application scenarios of AR/VR. Specifically, one of the first coil 11 and the second coil 17 inputs an excitation signal such as a video signal, a music signal so that the user enjoys the auditory feast, and the other inputs an excitation signal such as a vibration feedback so as to provide a haptic experience or alert the user of other information intervention when the user enjoys the auditory feast.

In some embodiments, the second coil 17 and the first coil 11 may be arranged to remain relatively fixed, e.g. the transducer device 10 comprises a second bracket 18 connecting the first coil 11 and the second coil 17. Wherein the second coil 17 may be connected to the second bracket 18 by a medium such as glue, the first coil 11 may be connected to the first bracket 14 by a medium such as glue, and the first bracket 14 and the second bracket 18 may be connected by means of a connection such as a plug.

In some embodiments, the transduction device 10 may include a second magnetic conductive member 19, at least a portion of the second magnetic conductive member 19 surrounding the periphery of the second coil 17 and at least partially overlapping the magnet assembly 12 in the axial direction AD, that is, the second magnetic conductive member 19 at least partially overlaps the orthographic projection of the magnet assembly 12 on the reference plane perpendicular to the radial direction RD, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the second coil 17, that is, the leakage flux is reduced, which is beneficial for improving the sensitivity of the transduction device 10. In addition, since the magnetic field direction of the inner periphery of the magnet assembly 12 and the magnetic field direction of the outer periphery of the magnet assembly 12 can be simply regarded as opposite, so that the current directions in the first coil 11 and the second coil 17 can also be opposite, the first inductance generated by the energized first coil 11 on the first magnetic conductive member 15 can be at least partially offset by the second inductance generated by the energized second coil 17 on the first magnetic conductive member 15, so that the total inductance is reduced, and the acoustic performance of the transducer 10 in the high frequency band can be improved.

In some embodiments, referring to fig. 18 and 19, the second magnetically permeable member 19 and the magnet assembly 12 may be configured to remain relatively stationary, with at least a portion of the second magnetically permeable member 19 being spaced from the second coil 17 in the radial direction RD. So configured, the second magnetically permeable member 19 can follow the movement of the magnet assembly 12 relative to the second coil 17, which is beneficial for improving the sensitivity of the transducer assembly 10.

In some embodiments, the second magnetic conductive member 19 may include a second body portion 191 and a second extension portion 192 connected to the second body portion 191, the second body portion 191 being provided in a hollow structure, the second extension portion 192 may extend toward an inner side of the second body portion 191 in the radial direction RD, the second body portion 191 surrounding an outer periphery of the second coil 17 and being spaced apart from the second coil 17 in the radial direction RD, and the second extension portion 192 being connected to the magnet assembly 12 and being spaced apart from the second coil 17 in the axial direction AD. The second magnetic conductive member 19 may be provided with magnetic conductive capability, for example, the second main body 191 and the second extension 192 are made of soft magnetic material; the second magnetic conductive member 19 may also be partially provided with magnetic conductive capability, for example, the second main body 191 and the second outer extension 192 are made of soft magnetic material and plastic material, respectively. Further, the second body portion 191 and the second extension portion 192 may be integrally formed structural members.

In some embodiments, referring to fig. 20 and 21, the second magnetic conductive member 19 and the second coil 17 may be configured to remain relatively fixed. So configured, the second magnetic conductive member 19 can move relative to the magnet assembly 12 following the second coil 17, which is not only beneficial to simplifying the structure of the second magnetic conductive member 19, but also beneficial to further alleviating (or even eliminating) the leakage sound generated by the transducer 10 due to the acoustic cavity effect.

In some embodiments, the distance between the second coil 17 and the second magnetic conductive member 19 in the radial direction RD may be smaller than the distance between the second coil 17 and the magnet assembly 12 in the radial direction RD, for example, the second coil 17 is fixed on the inner wall of the second magnetic conductive member 19. So arranged, compared with the technical solutions described in fig. 18 and 20, the magnetic gap between the second magnetic conductive member 19 and the magnet assembly 12 in the radial direction RD is smaller in the present technical solution, which is beneficial for improving the sensitivity of the transducer device 10.

In some embodiments, at least part of the second magnetically permeable member 19 may be made of a hard magnetic material, for example, the second magnetically permeable member 19 includes a hard magnet and a soft magnet stacked in the axial direction AD.

Next, the specific structure of the second coil 17, the magnet assembly 12, and the relationship thereof are exemplarily described. For convenience of description, the technical solution described in fig. 20 is taken as a basic structure of the transducer device 10. Therefore, after the specific structures and the relationships between the second coil 17 and the magnet assembly 12 are determined, the specific structures and the relationships between other structural components in the transducer device 10, such as the first coil 11, the magnet assembly 12, the first vibration-transmitting sheet 13, the first bracket 14, the first magnetic conductive member 15, and the buffer member 16, can be adaptively adjusted according to actual requirements, which are described in detail in any of fig. 1 to 17, and will not be repeated herein.

In some embodiments, in connection with fig. 22, the magnet assembly 12 may comprise one hard magnet 121, and the number of second coils 17 may also be only one, both at least partially overlapping in the axial direction AD, i.e. both at least partially overlapping in the orthographic projection on a reference plane perpendicular to the radial direction RD. In the circumferential direction around the axial direction AD, the hard magnet 121 may be a complete annular structure or may be formed by splicing a plurality of circular arc blocks; in the axial direction AD, the hard magnet 121 may be formed by splicing a plurality of hard magnets having opposite polarities. So configured, since the magnetic field distribution of the hard magnet 121 in the three-dimensional space is not uniform, the magnetic field strength of the magnetic field formed by the magnet assembly 12 is not equal everywhere, for example, the hard magnet 121 has stronger magnetic field strength at both ends than in the middle in the axial direction AD, while the second coil 17 has a larger portion corresponding exactly to the middle of the hard magnet 121, resulting in a smaller average value of the magnetic field strength B acting on the second coil 17 in the calculation formula F.

In some embodiments, referring to fig. 23, the magnet assembly 12 may include one hard magnet 121, and the second coil 17 may include two second sub-coils 171 spaced apart in the axial direction AD, and the two second sub-coils 171 may be respectively adjacent to both ends of the hard magnet 121. Wherein, the distance between the bisecting plane (e.g., P4 in fig. 23) of the second sub-coil 171 and the end face (e.g., P5 in fig. 23) of the hard magnet 121 in the axial direction AD may be less than or equal to half the size of the second sub-coil 171 in the axial direction AD. Preferably, the bisecting plane (e.g., P4 in fig. 23) of the second sub-coil 171 is coplanar with the end face (e.g., P5 in fig. 23) of the hard magnet 121 in the axial direction AD. So configured, the two second sub-coils 171 may be respectively located at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer device 10. Notably, are: the bisecting plane (e.g., P4 in fig. 23) of the second sub-coil 171 may refer to a plane where half of the dimension of the second sub-coil 171 in the axial direction AD is located, or may refer to a plane where half of the number of turns of the second sub-coil 171 is located, which will not be described in detail.

In some embodiments, two second sub-coils 171 may be connected in series with each other and wound in opposite directions. So configured, the ampere forces generated by the two second sub-coils 171, respectively, can remain the same. Of course, in other embodiments, the two second sub-coils 171 may also be connected in parallel with each other.

In some embodiments, the magnet assembly 12 may include two soft magnets 122, where the two soft magnets 122 are respectively connected to two end surfaces of the hard magnet 121, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the first coil 11 more, that is, the magnetic leakage is reduced, which is beneficial to improving the sensitivity of the transduction apparatus 10. Wherein, the distance between the bisecting plane (e.g., P4 in fig. 23) of the second sub-coil 171 and the bisecting plane (e.g., P6 in fig. 23) of the soft magnetic body 122 in the axial direction AD may be less than or equal to half the size of the second sub-coil 171 in the axial direction AD. Preferably, the bisecting plane (e.g., P4 in fig. 23) of the second sub-coil 171 is coplanar with the bisecting plane (e.g., P6 in fig. 23) of the soft magnetic body 122 in the axial direction AD. So configured, the two second sub-coils 171 may be respectively located at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer device 10. Notably, are: the bisecting plane (e.g., P6 in fig. 23) of the soft magnetic body 122 may refer to a plane in which a half of the dimension of the soft magnetic body 122 in the axial direction AD is located, and will not be described in detail.

In some embodiments, in conjunction with fig. 24 to 26, the magnet assembly 12 may include a plurality of hard magnets 121 arranged in the axial direction AD, for example, two hard magnets 121 shown in fig. 24 and 25, and further, for example, three hard magnets 121 shown in fig. 26, any adjacent two hard magnets 121 being disposed to have the same polarity opposite to each other so that the magnetic field formed by the magnet assembly 12 is as high as possible at the end of any one hard magnet 121. Based on this, the second coil 17 may include at least one second sub-coil 171, for example, one second sub-coil 171 shown in fig. 24, further, for example, three second sub-coils 171 shown in fig. 25, further, for example, two second sub-coils 171 shown in fig. 26, and at least one of all the second sub-coils 171 may overlap with the adjacent two hard magnets 121 in the axial direction AD, that is, at least one second sub-coil 171 may overlap with the orthographic projection of the adjacent two hard magnets 121 on the reference plane perpendicular to the radial direction RD. So configured, the second sub-coil 171 may be positioned at a location of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which may facilitate increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer assembly 10.

Further, the magnet assembly 12 may include a plurality of soft magnets 122, and the plurality of soft magnets 122 and the plurality of hard magnets 121 may be alternately arranged in the axial direction AD, so that the magnetic induction lines of the magnetic field generated by the magnet assembly 12 are more concentrated and pass through the second coil 17 more, that is, the leakage flux is reduced, which is advantageous for improving the sensitivity of the transduction apparatus 10.

In some embodiments, in combination with fig. 24, the number of hard magnets 121 may be two, and the second coil 17 may include one second sub-coil 171, and the second sub-coil 171 may overlap with two hard magnets 121 in the axial direction AD, that is, the second sub-coil 171 may overlap with the orthographic projection of two adjacent hard magnets 121 on the reference plane perpendicular to the radial direction RD, so that the second sub-coil 171 is located at a position where the magnetic field strength is higher in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transduction device 10. Similar to the solution described in fig. 23, in the present solution, the distance between the bisecting plane of the second sub-coil 171 and the bisecting plane of the soft magnet 122 in the axial direction AD may be smaller than or equal to half the dimension of the second sub-coil 171 in the axial direction AD. Preferably, the bisecting plane of the second sub-coil 171 is coplanar with the bisecting plane of the soft magnetic body 122 in the axial direction AD. So configured, the two second sub-coils 171 may be respectively located at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer device 10.

In some embodiments, referring to fig. 25 and 26, the magnet assembly 12 may include a plurality of hard magnets 121 arranged in the axial direction AD, the second coil 17 may include a plurality of second sub-coils 171, and the number of the second sub-coils 171 may not be equal to the number of the hard magnets 121, for example, two hard magnets 121 and three second sub-coils 171 as shown in fig. 25, and further, for example, three hard magnets 121 and two second sub-coils 171 as shown in fig. 26. Wherein at least one second sub-coil 171 may overlap with the adjacent two hard magnets 121 in the axial direction AD, i.e. at least one second sub-coil 171 may overlap with the orthographic projection of the adjacent two hard magnets 121 on a reference plane perpendicular to the radial direction RD, such that each second sub-coil 171 is located as much as possible at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous for increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transduction device 10. Similar to the solution described in fig. 23, in the present solution, the distance between the bisecting plane of the second sub-coil 171 and the bisecting plane of the soft magnet 122 in the axial direction AD may be smaller than or equal to half the dimension of the second sub-coil 171 in the axial direction AD. Preferably, the bisecting plane of the second sub-coil 171 is coplanar with the bisecting plane of the soft magnetic body 122 in the axial direction AD. So configured, each of the second sub-coils 171 is located as much as possible at a position of higher magnetic field strength in the magnetic field formed by the magnet assembly 12, which is advantageous in increasing the average value of the magnetic field strength B, thereby increasing the sensitivity of the transducer assembly 10.

In some embodiments, a plurality of second sub-coils 171 may be connected in series with each other, and the winding directions of any adjacent two second sub-coils 171 are opposite. So configured, the ampere forces respectively generated by the plurality of second sub-coils 171 can be maintained in the same direction. Of course, in other embodiments, the two second sub-coils 171 may also be connected in parallel with each other.

In general, the smaller the resistance of the second coil 17, the smaller the partial pressure thereof; the transducer 10 is typically coupled to a corresponding power amplifier having an output efficiency proportional to the size of the load (e.g., the resistance of the second coil 17) coupled thereto. Based on this, if the size of the second coil 17 in the axial direction AD is increased, for example, the second coil 17 is wound several more turns, the average value of the magnetic field strength B is reduced although the resistance of the second coil 17 is increased. Therefore, by providing the second coils 17 including a plurality of second sub-coils 171 and each of the second sub-coils 171 as much as possible at a position where the magnetic field strength is higher in the magnetic field formed by the magnet assembly 12, it is advantageous to increase not only the resistance of the second coils 17 to increase the output efficiency of the power amplifier, but also the average value of the magnetic field strength B to increase the sensitivity of the transducer 10, as compared to the case where the number of the second coils 17 is only one or the case where the second coils 17 include one second sub-coil 171.

As described in connection with fig. 13 to 17 and 22 to 26, the specific structures of the first coil 11 and the second coil 17 may be the same or similar after the specific structure of the magnet assembly 12 is determined. For example: the magnet assembly 12 includes one hard magnet 121, and the first coil 11 and the second coil 17 include two first sub-coils 111 and two second sub-coils 171, respectively, which are disposed at intervals in the axial direction AD. For another example: the magnet assembly 12 comprises two hard magnets 121, the first coil 11 and the second coil 17 respectively comprise a first sub-coil 111 and a second sub-coil 171, the first sub-coil 111 and the second sub-coil 171 respectively overlapping the two hard magnets 121 in the axial direction AD, i.e. the first sub-coil 111 and the second sub-coil 171 respectively overlapping the orthographic projections of the two hard magnets 121 on a reference plane perpendicular to the radial direction RD. Also for example: the magnet assembly 12 includes a plurality of hard magnets 121 arranged in the axial direction AD, and the first coil 11 and the second coil 17 include a plurality of first sub-coils 111 and a plurality of second sub-coils, respectively, the number of the first sub-coils 111 and the second sub-coils 171 being unequal to the number of the hard magnets 121, respectively, the number of the first sub-coils 111 being unequal to the number of the second sub-coils 171, for example, two hard magnets 121, three first sub-coils 111 and three second sub-coils 171, and further for example, three hard magnets 121, two first sub-coils 111 and two second sub-coils 171.

Based on the above description, the mechanical vibrations generated by the transducer device 10 may be transmitted to the user either in a bone conduction manner or in a combination of bone conduction and air conduction, or in an air conduction manner. In general, compared to bone conduction, air conduction requires an additional diaphragm structure. Among them, for convenience of description, the following is exemplarily described by taking a case where mechanical vibration generated by the transducer device 10 is transmitted to a user in a bone conduction manner.

As an example, in connection with fig. 27 to 32, the deck module 20 may include a deck housing 21 and a transduction device 10, the transduction device 10 being disposed in a receiving cavity of the deck housing 21. The specific structure of the transducer 10 is shown in any of the embodiments of fig. 1 to 26, and will not be described herein. Further, for convenience of description, the technical solution described in fig. 3 is taken as the basic structure of the transducer device 10.

In some embodiments, in conjunction with fig. 27, cartridge housing 21 may include a cylindrical side wall 211, and first and second end walls 212, 213 connected to both ends of cylindrical side wall 211, respectively, and transducer 10 is located between first and second end walls 212, 213 and connected to one of first and second end walls 212, 213, for example, first bracket 14 is connected to first end wall 212 in any of the embodiments of fig. 3-17, and second bracket 18 is connected to first end wall 212 in any of the embodiments of fig. 18-26, for example. So configured, mechanical vibrations generated by the transduction device 10 may be transmitted to the user through one of the first end wall 212 and the second end wall 213 for contact with or abutment against the skin of the user. Of course, in other embodiments, the first coil 11 may also be directly connected to one of the first end wall 212 and the second end wall 213, and the magnet assembly 12 is connected to the deck housing 21 through the first vibration-transmitting piece 13.

In some embodiments, referring to fig. 28 and 29, the transducer 10 includes a first coil 11, a magnet assembly 12, a first vibration-transmitting plate 13, a first support 14, and a second coil 17, the magnet assembly 12 surrounds the periphery of the first coil 11, the second coil 17 surrounds the periphery of the magnet assembly 12, the first coil 11 is connected to the first support 14, and the first support 14 is connected to the magnet assembly 12 through the first vibration-transmitting plate 13. Wherein the first bracket 14 may include two first end caps 141 disposed at intervals in the axial direction AD, one first end cap 141 may be connected to the first end wall 212, the other first end cap 141 may be connected to the second end wall 213, and the second coil 17 and the cartridge case 21 remain relatively fixed. So configured, mechanical vibrations generated by the transduction device 10 may be transmitted to the user through one of the first end wall 212 and the second end wall 213 for contact with or abutment against the skin of the user.

In some embodiments, referring to fig. 30 to 32, the deck module 20 may include a second vibration-transmitting sheet 22 and a vibration panel 23, and the transducer device 10 is suspended in the receiving cavity of the deck housing 21 by the second vibration-transmitting sheet 22, and the vibration panel 23 is connected to the transducer device 10. In the embodiment of fig. 3 to 17, the vibration panel 23 may be connected to the first bracket 14, and in the embodiment of fig. 18 to 26, the vibration panel 23 may be connected to the second bracket 18. So configured, mechanical vibrations generated by the transducer assembly 10 may be transmitted to a user through the vibration panel 23. Further, the specific structure of the second vibration-transmitting sheet 22 may be the same as or similar to that of the first vibration-transmitting sheet 13, and will not be described herein. The edge region of the second vibration-transmitting sheet 22 may be connected to the deck housing 21, the center region of the second vibration-transmitting sheet 22 may be connected to the center region of the first bracket 14, and the center region of the second vibration-transmitting sheet 22 may be connected to the edge region of the first bracket 14 or the first magnetic conductive member 15. Notably, are: compared with the technical scheme depicted in fig. 27, in the technical scheme, the transducer 10 is suspended in the accommodating cavity of the core housing 21 through the second vibration transmitting piece, and the mechanical vibration generated by the transducer 10 can be less transmitted to the core housing 21, which is beneficial to reducing the leakage sound of the core module 20.

In some embodiments, the number of second vibration-transmitting sheets 22 may be two, and the two second vibration-transmitting sheets 22 are respectively located on opposite sides of the transducer device 10 in the axial direction AD. So set up, the transduction device 10 is hung in the core housing 21 by two second vibration transmitting pieces 22 spaced apart from each other, is favorable to reducing the risk that transduction device 10 appears rocking in the course of the work for core module 20 works more steadily.

In some embodiments, in conjunction with fig. 31, cartridge housing 21 may include a cylindrical side wall 211 and an end wall (e.g., first end wall 212), first end wall 212 being connected to one end of cylindrical side wall 211 such that the other end of cylindrical side wall 211 is open. Wherein, movement module 20 may include an elastic coating 24 connected to vibration panel 23, e.g., elastic coating 24 covers vibration panel 23, elastic coating 24 is connected to the other end of cylindrical sidewall 211. Further, the hardness of the elastic coating 24 may be smaller than that of the vibration panel 23. So set up, the open end of core casing 21 is covered by elastic coating 24, is favorable to increasing the waterproof dustproof performance of core module 20 to and avoid transducer 10 to fall out from core casing 21 under the extreme operating mode such as falling, and increase the outward appearance expressive force of core module 20.

In some embodiments, in conjunction with fig. 32, cartridge housing 21 may include a cylindrical side wall 211, and first and second end walls 212 and 213 connected to both ends of cylindrical side wall 211, respectively, with transducer 10 located between first and second end walls 212 and 213. Wherein the first end wall 212 is provided with mounting holes 214. Further, the transducer assembly 10 is located between the first end wall 212 and the second end wall 213, and the vibration panel 23 may include a main body 231 and a connection portion 232 connected to the main body 231, where the main body 231 is located outside the cartridge case 21, and the connection portion 232 extends into the cartridge case 21 through the mounting hole 214 and is connected to the transducer assembly 10. The area of the main body 231 is larger than the area of the mounting hole 214, and the area of the mounting hole 214 is larger than the area of the connecting portion 232, as viewed in the axial direction AD. In this way, even if the mechanical vibration generated by the transducer 10 is transmitted to the core housing 21 via the second vibration transmitting plate 22, the phases of the leakage sounds generated by the first end wall 212 and the second end wall 213 along with the vibration of the transducer 10 are opposite, and the two phases can be opposite in far field, that is, the core housing 21 can reduce the leakage sounds of the core module 20 based on the principle of an acoustic dipole. Therefore, the core housing 21 can be provided with less or no sound leakage holes, which is beneficial to improving the waterproof and dustproof performance of the core module 20. For example: the receiving cavity of the deck housing 21 may communicate with the outside of the deck module 20 only through a passage, which is a gap between the connection portion 232 and the wall surface of the mounting hole 214.

As an example, in connection with fig. 33, electronic device 30 may include a support assembly 31 and a deck module 20, support assembly 31 may be coupled to deck housing 21 and configured to support deck module 20 in a donned position. The specific structure of the movement module 20 is shown in any one of the embodiments of fig. 27 to 32, and will not be described herein. Further, the support member 31 may be annularly disposed and wound around the user's ear, as shown in fig. 33 (a); the ear hook may also be configured to engage the rear hook to hang over the user's ear and around the rear side of the head, as shown, for example, in fig. 33 (b); it may also be provided in a head rest configuration and wrapped around the top of the user's head, as shown for example in fig. 33 (c). Correspondingly, the wearing position can be the front side of the ear of the user, which is away from the head, and the wearing position can also be the position of the cheek of the user, which is close to the ear. Accordingly, the electronic device 30 may have a terminal device of an audio playing function, such as headphones and smart glasses.

In some embodiments, electronic device 30 may include a housing coupled to support assembly 31, and movement module 20 may be assembled as a module within the housing. So set up, no matter how the basic structure of electronic device 30 changes, the core structural component of movement module 20 can be regarded as a module to assemble, debug etc. the operation, be favorable to increasing the commonality of movement module 20, reduce the manufacturing cost of electronic device 30.

The foregoing description is only a partial embodiment of the present application, and is not intended to limit the scope of the present application, and all equivalent devices or equivalent process transformations made by using the descriptions and the drawings of the present application, or direct or indirect application to other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A transducer assembly comprising a first coil and a magnet assembly, and a first vibration transmitting plate connecting the first coil and the magnet assembly, wherein the magnet assembly surrounds the periphery of the first coil, the magnet assembly and the first coil are spaced in the radial direction of the transducer assembly, and at least partially overlap in the axial direction of the transducer assembly, and in an operating state in which the transducer assembly inputs an excitation signal, the first coil energized generates a first ampere force in a magnetic field formed by the magnet assembly to enable the first coil and the magnet assembly to move relatively.

2. The transducer arrangement according to claim 1, wherein the inner side of the first coil is not provided with a hard magnet.

3. The transducer apparatus of claim 1, wherein the transducer apparatus comprises a first magnetically permeable member, the first coil being wrapped around a periphery of the first magnetically permeable member, the first magnetically permeable member at least partially overlapping the magnet assembly in the axial direction.

4. A transducer arrangement according to claim 3, wherein the ratio between the dimension of the first magnetically permeable member in the axial direction and the dimension of the first coil in the axial direction is greater than or equal to 1.

5. A transducer arrangement according to claim 3, wherein the first magnetically permeable member is provided in a hollow configuration.

6. The transducer arrangement according to claim 5, wherein a ratio between a dimension of the first magnetically permeable member in the radial direction and a dimension of the first coil in the radial direction is between 0.5 and 1.5.

7. A transducer arrangement according to claim 3, wherein the first magnetically permeable member and the magnet assembly are arranged to remain relatively fixed, at least part of the first magnetically permeable member being spaced from the first coil in the radial direction.

8. The transducer assembly of claim 7, wherein the first magnetically permeable member includes a first body portion and a first outer extension connected to the first body portion, the first coil surrounding the outer periphery of the first body portion and spaced from the first body portion in the radial direction, the first outer extension connected to the magnet assembly and spaced from the first coil in the axial direction.

9. The transducer assembly of claim 7, wherein the first vibration-transmitting plate includes an inner ring-fixing portion and an outer ring-fixing portion nested with each other, and a plurality of spoke-shaped portions connecting the inner ring-fixing portion and the outer ring-fixing portion, the outer ring-fixing portion being connected to the magnet assembly, the transducer assembly including a bracket connected to the first coil, the inner ring-fixing portion being connected to a central region of the bracket, or the inner ring-fixing portion being connected to an edge region of the bracket.

10. A transducer according to claim 3, wherein the first magnetically permeable member and the first coil are arranged to remain relatively fixed, and wherein an orthographic projection of the first magnetically permeable member on a reference plane perpendicular to the axial direction does not overlap with an orthographic projection of the magnet assembly on the reference plane.

11. The transducer apparatus of claim 10, wherein orthographic projections of the first coil, the magnet assembly, and the first magnetically permeable member in the radial direction at least partially overlap, a spacing of a region of the first magnetically permeable member and the magnet assembly overlapping in the radial direction being less than or equal to 1.5 times a minimum spacing between the first magnetically permeable member and the magnet assembly.

12. The transducer apparatus of claim 10, wherein a spacing of the first coil from the first magnetically permeable member in the radial direction is less than a spacing of the first coil from the magnet assembly in the radial direction.

13. The transducer assembly of claim 10, wherein the first vibration-transmitting plate includes an inner ring-securing portion and an outer ring-securing portion nested within each other, and a plurality of spokes connecting the inner ring-securing portion and the outer ring-securing portion, the outer ring-securing portion being connected to the magnet assembly, the inner ring-securing portion being connected to the first magnetically permeable member.

14. The transducer assembly of claim 10, wherein the first vibration-transmitting plate includes an inner ring-fixing portion and an outer ring-fixing portion nested with each other, and a plurality of spoke-shaped portions connecting the inner ring-fixing portion and the outer ring-fixing portion, the outer ring-fixing portion being connected to the magnet assembly, the transducer assembly including a bracket connected to the first magnetic conductive member, the inner ring-fixing portion being connected to a central region of the bracket, or the inner ring-fixing portion being connected to an edge region of the bracket.

15. The transducer assembly of claim 14, wherein the support includes two end caps spaced apart in the axial direction, the two end caps being respectively connected to the first magnetically permeable member at opposite ends in the axial direction.

16. The transducer arrangement according to claim 10, wherein at least part of the first magnetically permeable member is made of a hard magnetic material.

17. The transducer assembly of any of claims 10-16, wherein the number of first vibration-transmitting tabs is two, the two first vibration-transmitting tabs being located on opposite sides of the first coil in the axial direction, respectively.

18. The transducer apparatus of claim 17, wherein the first vibration-transmitting sheet includes an inner ring fixing portion and an outer ring fixing portion nested with each other, and a plurality of spoke portions connecting the inner ring fixing portion and the outer ring fixing portion, each of the spoke portions being spirally expanded from the inner ring fixing portion toward the outer ring fixing portion, a spiral direction of the spoke portion of one of the first vibration-transmitting sheets being opposite to a spiral direction of the spoke portion of the other of the first vibration-transmitting sheets as viewed in the axial direction.

19. A transducer according to claim 3, wherein the first magnetically permeable member and the first coil are arranged to remain relatively fixed, the first magnetically permeable member including a first body portion and a first extension portion connected to the first body portion, the first coil being wrapped around the periphery of the first body portion, the first extension portion being spaced from the magnet assembly in the axial direction, an orthographic projection of the first body portion on a reference plane perpendicular to the axial direction not overlapping an orthographic projection of the magnet assembly on the reference plane, the orthographic projection of the first extension portion on the reference plane overlapping an orthographic projection of the magnet assembly on the reference plane, the first body portion being spaced from the magnet assembly in the radial direction less than the spacing of the first extension portion from the magnet assembly in the axial direction.

20. The transduction device according to claim 1, characterized in that the transduction device comprises a buffer member arranged inside the magnet assembly, the buffer member being located on at least one side of the first coil in the axial direction, the buffer member having a larger dimension in the radial direction than the first coil.

21. The transducer assembly of claim 20, wherein the transducer assembly includes a first magnetically permeable member, the first coil being wrapped around a periphery of the first magnetically permeable member, the first magnetically permeable member and the first coil being configured to remain relatively stationary, the buffer member being secured to the first magnetically permeable member.

22. The transducer assembly of claim 1, wherein the magnet assembly comprises a hard magnet, the first coil comprising two first sub-coils spaced apart in the axial direction, the first sub-coils having a split face spaced from an end face of the hard magnet in the axial direction less than or equal to half the dimension of the first sub-coils in the axial direction.

23. The transducer arrangement according to claim 22, wherein two of the first sub-coils are connected in series with each other and are wound in opposite directions.

24. The transducer of claim 22, wherein the magnet assembly comprises two soft magnets, the two soft magnets being connected to two end faces of the hard magnet, respectively, and a distance between a bisecting face of the first sub-coil and a bisecting face of the soft magnet in the axial direction is less than or equal to half a dimension of the first sub-coil in the axial direction.

25. A movement module comprising a movement housing and a transducer device according to any one of claims 1 to 24, the transducer device being disposed in a cavity of the movement housing.

26. The movement module of claim 25, comprising a second vibration-transmitting sheet and a vibration panel, wherein the transduction device is suspended within the receiving cavity by the second vibration-transmitting sheet, and wherein the vibration panel is coupled to the transduction device.

27. The movement module according to claim 26, wherein the number of the second vibration-transmitting pieces is two, and the two second vibration-transmitting pieces are located on opposite sides of the transducer device in the axial direction, respectively.

28. The cartridge module of claim 26, wherein the cartridge housing comprises a cylindrical side wall and an end wall, the end wall being connected to one end of the cylindrical side wall such that the other end of the cylindrical side wall is open, the cartridge module comprising an elastic coating connected to the vibration panel, the elastic coating being connected to the other end of the cylindrical side wall.

29. The cartridge module of claim 26, wherein the cartridge housing comprises a cylindrical side wall, and a first end wall and a second end wall respectively connected to both ends of the cylindrical side wall, the first end wall is provided with a mounting hole, the transduction device is located between the first end wall and the second end wall, the vibration panel comprises a main body portion and a connection portion connected with the main body portion, the main body portion is located outside the cartridge housing, the connection portion extends into the cartridge housing through the mounting hole and is connected with the transduction device, and the area of the main body portion is larger than the area of the mounting hole, and the area of the mounting hole is larger than the area of the connection portion, as viewed in the axial direction.

30. The cartridge module of claim 29, wherein the receiving chamber communicates with the exterior of the cartridge module only through a channel, the channel being a gap between the connecting portion and a wall of the mounting hole.

31. An electronic device comprising a support assembly and the cartridge module of any one of claims 25-30, the support assembly being coupled to the cartridge housing and configured to support the cartridge module in a donned position.

32. The electronic device of claim 31, comprising a housing coupled to the support assembly, the deck module being mounted as a module within the housing.