CN117729492A

CN117729492A - Sound producing device and electronic equipment

Info

Publication number: CN117729492A
Application number: CN202311523843.5A
Authority: CN
Inventors: 李波波; 刘松; 蔡晓东
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-11-15
Filing date: 2023-11-15
Publication date: 2024-03-19

Abstract

The invention discloses a sound generating device and electronic equipment, the sound generating device comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a yoke plate, a first magnetic circuit part and a second magnetic circuit part, the first magnetic circuit part is provided with a first magnetic gap, the second magnetic circuit part is arranged on the periphery side of part of the first magnetic circuit part, the vibration system comprises a first vibration component and a second vibration component, the vibration direction of the first vibration component is vertical, the first vibration component comprises a first vibrating diaphragm and a first voice coil, the first voice coil is arranged in the first magnetic gap, the second vibration component comprises a second vibrating diaphragm and a second voice coil, the second voice coil is a flat voice coil, the central axis of the second voice coil is vertical to the second vibrating diaphragm, the second voice coil is at least provided with a first conducting wire segment and a second conducting wire segment which are oppositely arranged, the current directions of the first conducting wire segment and the second conducting wire segment are opposite, and the magnetic induction line of the second magnetic circuit part at least partially penetrates the first conducting wire segment and the second conducting wire segment along the vibration direction of the first conducting wire segment and the second conducting wire segment.

Description

Sound producing device and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a sound generating device and electronic equipment using the same.

Background

With the development of portable consumer electronics market, the micro-sound generator is widely applied, and with the multifunctional and miniaturized design of portable terminal electronics, the requirements on the vibroacoustic performance of the micro-sound generator are raised. The effective frequency band of the miniature loudspeaker module in the intelligent mobile terminal is narrower at present, tone quality is monotonous, tone quality is poor, and various functional requirements cannot be met.

Disclosure of Invention

The invention mainly aims to provide a sounding device and electronic equipment, and aims to provide a sounding device with mutually independent vibration radiation surfaces and arranged at an included angle.

In order to achieve the above object, the present invention proposes a sound emitting device,

the sound generating device comprises a shell, a magnetic circuit system and a vibration system which are connected with the shell,

the magnetic circuit system comprises a yoke plate, a first magnetic circuit part and a second magnetic circuit part, wherein the first magnetic circuit part is arranged on the yoke plate, the first magnetic circuit part comprises a central magnetic circuit and a side magnetic circuit, and the side magnetic circuit is arranged on the outer side of the central magnetic circuit and is spaced from the central magnetic circuit to form a first magnetic gap; the second magnetic circuit part is arranged on one side of part of the side magnetic circuit far away from the central magnetic circuit;

The vibration system comprises a first vibration component and a second vibration component, the vibration directions of the first vibration component and the second vibration component are perpendicular, the first vibration component is opposite to the first magnetic circuit part, the first vibration component comprises a first vibrating diaphragm and a first voice coil, one end of the first voice coil is connected with the first vibrating diaphragm, and the other end of the first voice coil is suspended in the first magnetic gap;

the second vibration assembly is opposite to the second magnetic circuit part, the second vibration assembly comprises a second vibrating diaphragm and a second voice coil, the second voice coil is a flat voice coil, the central axis of the second voice coil is perpendicular to the second vibrating diaphragm, the second voice coil and the second magnetic circuit part are arranged at intervals along the vibration direction of the second vibration assembly, the second voice coil is at least provided with a first wire segment and a second wire segment which are oppositely arranged, the current directions in the first wire segment and the second wire segment are opposite, and at least part or at least part of the component of the magnetic induction line of the second magnetic circuit part passes through the first wire segment and the second wire segment along the vibration direction of the first vibration assembly and the direction of the magnetic induction line passing through the first wire segment and the second wire segment is opposite; wherein,

Along the vibration direction of first vibration subassembly, the size of second magnetic circuit part is greater than the size of first magnetic circuit part, the second magnetic circuit part includes at least three magnetic areas, three magnetic areas include middle first magnetic area and the second magnetic area of both sides, the direction of arranging of three magnetic areas is on a parallel with the vibration direction of first vibration subassembly, first magnetic area is followed the vibration direction of second vibration subassembly is magnetized, the direction of magnetizing of second magnetic area is perpendicular to the direction of magnetizing of first magnetic area, just the magnetic pole of the second magnetic area is close to one side of first magnetic area is the same with the magnetic pole of the first magnetic area is close to one side of second voice coil.

In one embodiment, the second magnetic circuit part comprises a bar magnet, and the three magnetic areas are three magnetizing areas of the bar magnet;

or the second magnetic circuit part comprises three mutually independent bar magnets, the arrangement direction of the three bar magnets is parallel to the vibration direction of the first vibration component, and the three bar magnets correspondingly form the three magnetic areas;

alternatively, the second magnetic circuit portion includes a ring magnet having a central axis parallel to the central axis of the second voice coil, and a bar magnet provided at the center of the ring magnet, the bar magnet forming the first magnetic region, and two opposite sides of the ring magnet forming the second magnetic region.

In an embodiment, the side magnetic circuit includes a first side magnetic circuit and a second side magnetic circuit, the first side magnetic circuit is located outside the center magnetic circuit and forms a first sub-gap at intervals, the second side magnetic circuit is located outside the center magnetic circuit and forms a second sub-gap at intervals, the first sub-gap is communicated with the second sub-gap to form the first magnetic gap, and the second magnetic circuit portion is located on one side of the second side magnetic circuit away from the center magnetic circuit.

In an embodiment, along the vibration direction of the second vibration component, 0.5×the size of the first side magnetic circuit opposite to the second side magnetic circuit is smaller than or equal to the size of the first side magnetic circuit opposite to the second side magnetic circuit;

and/or, along the vibration direction of the second vibration component, the size of the second magnetic circuit part is less than or equal to 0.5 x the size of the second side magnetic circuit;

and/or the yoke plate is in a flat plate shape, the yoke plate is provided with a concave part, and the second magnetic circuit part and the second side magnetic circuit are arranged on the concave part.

In an embodiment, a metal plate is further disposed on a side of the second magnetic circuit portion away from the second voice coil, and the metal plate includes a carrying portion for carrying the second magnetic circuit portion and a fixing portion connected to the housing.

In an embodiment, the fixing portion is bent and extended from an edge of the bearing portion toward a side where the second voice coil is located, and the fixing portion is embedded in the housing.

In an embodiment, the first wire segment and the second wire segment are long axis segments of the second voice coil, and an arrangement direction of the first wire segment and the second wire segment is parallel to a vibration direction of the first vibration component.

In an embodiment, the second voice coil includes a plurality of second voice coils, and the plurality of second voice coils are arranged along the extending direction of the first wire segment;

and/or the aspect ratio of the inner diameter of the second voice coil is less than or equal to 20;

and/or the second vibrating diaphragm is a planar vibrating diaphragm, or the second vibrating diaphragm comprises a second folding ring and a second reinforcing part arranged in the center of the second folding ring;

and/or, the second voice coil is formed by coiling enamelled wires, or comprises a circuit board and a coil structure formed by conductive lines arranged on the circuit board.

In an embodiment, the second diaphragm is a planar diaphragm, and the planar diaphragm is made of any one of PEN, LCP, PEEK, carbon paper and magnesium-lithium alloy;

and/or the second vibrating diaphragm is a planar vibrating diaphragm, and a reinforcing part is arranged in the central area of the second vibrating diaphragm.

In an embodiment, the housing includes a first housing and a second housing disposed at an included angle, the first housing and the second housing enclose a mounting cavity, the magnetic circuit system is disposed in the mounting cavity, the first diaphragm is connected with the first housing, and the second diaphragm is connected with the second housing;

the first vibration assembly further comprises a first centering support piece, one end of the first centering support piece is connected with the first shell, and the other end of the first centering support piece is connected with one end, far away from the first vibrating diaphragm, of the first voice coil.

In an embodiment, the first vibration assembly is for bass sounds and the second vibration assembly is for treble sounds;

and/or the size of the magnetic circuit system along the vibration direction of the first vibrating diaphragm is smaller than the size of the magnetic circuit system along the vibration direction of the second vibrating diaphragm.

The invention also provides electronic equipment, which comprises an equipment shell and the sounding device, wherein the sounding device is arranged on the equipment shell.

According to the sound production device, the first vibration component and the second vibration component are arranged on the vibration system, so that the first vibration component is opposite to the magnetic circuit system, the second vibration component is opposite to the magnetic circuit system, the magnetic circuit system is utilized to simultaneously provide a magnetic field and driving force for the first vibration component and the second vibration component, the magnetic field utilization rate is improved, the cost and the size are reduced, the vibration direction of the first vibration component and the vibration direction of the second vibration component are further arranged to be included angles, and therefore the vibration system can form two mutually independent vibration radiation surfaces which are arranged at the included angles, multifunctional application is achieved, and the sound production effect is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a sound emitting device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating another view angle of a sound emitting device according to an embodiment of the present invention;

FIG. 3 is an exploded view of a sound emitting device according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a sound emitting device according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a portion of a sound emitting device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a part of the structure of a sound emitting device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram showing a part of the structure of a sound emitting device according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating a portion of a sound emitting device according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of a portion of a sound emitting device according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a portion of a sound emitting device according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of a portion of a sound emitting device according to an embodiment of the present invention;

FIG. 12 is a schematic cross-sectional view of a portion of a sound emitting device according to an embodiment of the present invention;

FIG. 13 is an enlarged schematic view of FIG. 12 at D;

FIG. 14 is a schematic view of a structure of a housing according to an embodiment of the invention;

FIG. 15 is a schematic diagram illustrating another view of a sound device according to an embodiment of the present invention;

FIG. 16 is a perspective view of a module housing with a portion of the sound module removed in accordance with one embodiment of the present invention;

FIG. 17 is an exploded view of a sound module according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a lower housing of a sound module according to an embodiment of the present invention;

FIG. 19 is a schematic plan view of a sound module according to an embodiment of the invention;

FIG. 20 is a schematic cross-sectional view taken along line B-B of FIG. 19;

fig. 21 is a schematic cross-sectional view taken along line A-A of fig. 19.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Based on the above concepts and problems, the present invention proposes a sound emitting device 100. It will be appreciated that the sound emitting device 100 is applied to an electronic device, which may be a mobile phone, a sound, a computer, a headset, a watch, or a television, or the sound emitting device 100 is applied to a speaker module, etc., and is not limited herein.

Referring to fig. 1 to 21 in combination, in the embodiment of the invention, the sound generating device 100 includes a magnetic circuit system 2 and a vibration system 3, the vibration system 3 includes a first vibration component 31 and a second vibration component 32, the first vibration component 31 is opposite to the magnetic circuit system 2, the second vibration component 32 is opposite to the magnetic circuit system 2, and a vibration direction of the first vibration component 31 and a vibration direction of the second vibration component 32 form an included angle.

According to the sound production device 100, the first vibration component 31 and the second vibration component 32 are arranged on the vibration system 3, so that the first vibration component 31 is opposite to the magnetic circuit system 2, and the second vibration component 32 is opposite to the magnetic circuit system 2, so that the magnetic circuit system 2 is utilized to simultaneously provide a magnetic field and a driving force for the first vibration component 31 and the second vibration component 32, the magnetic field utilization rate is improved, the cost is reduced, and the vibration direction of the first vibration component 31 and the vibration direction of the second vibration component 32 are arranged to be in an included angle, so that the vibration system 3 forms two mutually independent vibration radiation surfaces which are arranged in an included angle, the multifunctional application is realized, and the sound production effect is effectively improved. Alternatively, the vibration directions of the first vibration assembly 31 and the second vibration assembly 32 are arranged vertically.

In an embodiment, the sound generating device 100 further includes a housing 1, the housing 1 includes a first casing 12 and a second casing 13 that are disposed at an included angle, the first casing 12 and the second casing 13 enclose to form a mounting cavity, the magnetic circuit system 2 is disposed in the mounting cavity, the first vibration component 31 is connected to the first casing 12 and opposite to the magnetic circuit system 2, the second vibration component 32 is connected to the second casing 13 and opposite to the magnetic circuit system 2, and a vibration direction of the first vibration component 31 is disposed at an included angle with a vibration direction of the second vibration component 32. Alternatively, the first housing 12 and the second housing 13 are integrally formed, thus improving the structural strength and stability of the housing 1. It will be appreciated that the first housing 12 and the second housing 13 enclose a mounting cavity, which may be a through cavity or a through slot structure. Alternatively, the first housing 12 and the second housing 13 are disposed vertically.

In this embodiment, the first housing 12 has a rectangular structure, the first housing 12 has two opposite long sides and two short sides, two ends of the short sides are respectively connected to the two long sides, and two ends of the long sides are respectively connected to the two short sides. It will be appreciated that the second housing 13 is connected to the long side or the short side of the first housing 12 such that the second housing 13 is disposed perpendicular to the first housing 12.

It will be appreciated that the second housing 13 may alternatively be a rectangular structure, where the second housing 13 has two opposite long sides and two short sides, two ends of the short sides are connected to the two long sides, and two ends of the long sides are connected to the two short sides. In the present embodiment, the first housing 12 and the second housing 13 share one long side or short side, i.e., the first housing 12 and the second housing 13 have a shared side 14 in common. The two long sides and the two short sides of the first housing 12 define a first opening, and the two long sides and the two short sides of the second housing 13 define a second opening, which communicate with the mounting cavity, respectively. Alternatively, the first opening and the second opening are located at adjacent two surfaces of the housing 1.

When the housing 1 is a metal member, the magnetic circuit 2 and the housing 1 are fixed by adhesion or welding. In another embodiment, when the housing 1 is formed by injection molding, the side magnetic plate 235 of the magnetic circuit 2 is first injection molded into the housing 1 as an insert, or the magnetic circuit 2 and the housing 1 are fixed by adhesion, and then the other parts are fixed by adhesion, which is not limited herein.

In the present embodiment, the magnetic circuit system 2 is disposed in the installation cavity of the housing 1 and is connected to the first casing 12 and the second casing 13 of the housing 1. The vibration system 3 is connected to the first casing 12 and the second casing 13 of the housing 1, and is opposed to the magnetic circuit system 2. It can be understood that the first vibration component 31 of the vibration system 3 is connected with the first casing 12 and covers the first opening, the second vibration component 32 is connected with the second casing 13 and covers the second opening, so that the first casing 12 and the second casing 13 of the casing 1, the first vibration component 31 and the second vibration component 32, and the magnetic circuit system 2 jointly enclose a vibration space.

It can be appreciated that in the present embodiment, the magnetic circuit system 2 provides the magnetic field and the driving force for the first vibration assembly 31 and the second vibration assembly 32, so that the first vibration assembly 31 and the second vibration assembly 32 share the magnetic circuit system 2, thereby reducing the cost of the sound generating device 100 while improving the magnetic field utilization rate. In the present embodiment, the vibration direction of the first vibration assembly 31 is perpendicular to the vibration direction of the second vibration assembly 32.

According to the sound generating device 100, the shell 1 is arranged to be the first shell 12 and the second shell 13 which are arranged at the included angle, and the installation cavity is formed by surrounding, so that the magnetic circuit system 2 and the vibration system 3 are installed and fixed by utilizing the installation cavity, the design and the assembly procedures of the sound generating device 100 are simplified, and the sound generating device is convenient to produce.

In an embodiment, the size of the magnetic circuit system 2 along the vibration direction of the first vibration component 31 is smaller than the size of the magnetic circuit system along the vibration direction of the second vibration component 32, so that the size of the sound emitting device 100 can be reduced, and the miniaturized design of the sound emitting device 100 is facilitated.

In one embodiment, the magnetic circuit system 2 includes a yoke plate 21, a first magnetic circuit portion 22, and a second magnetic circuit portion 23, the first magnetic circuit portion 22 being provided to the yoke plate 21, the first magnetic circuit portion 22 having a first magnetic gap 221, the second magnetic circuit portion 23 being provided to a peripheral side of a part of the first magnetic circuit portion 22, the second magnetic circuit portion 23 driving the second vibration assembly 32 to vibrate. The second magnetic circuit portion 23 is provided on the peripheral side of a part of the first magnetic circuit portion 22 and is opposed to the second vibration system 3, so that the thickness (Z-axis) direction of the sound emitting device 100 is occupied, which is advantageous for flattening the sound emitting device 100 and for thinning the electronic apparatus.

Further, the first magnetic circuit portion 22 includes a central magnetic circuit 222 and a side magnetic circuit 223, the side magnetic circuit 223 being provided outside the central magnetic circuit 222 and being spaced apart from the central magnetic circuit 222 to form a first magnetic gap 221; the first vibration assembly 31 is opposite to the first magnetic circuit portion 22, the first vibration assembly 31 includes a first diaphragm 311 and a first voice coil 312, one end of the first voice coil 312 is connected to the first diaphragm 311, and the other end is suspended in the first magnetic gap 221. It will be appreciated that the first magnetic gap 221 surrounds the central magnetic circuit 222 and that the first voice coil 312 is disposed around the central magnetic circuit 222.

Further, the second magnetic circuit portion 23 is disposed on a side of the partial side magnetic circuit 223 away from the central magnetic circuit 222, the second vibration assembly 32 is opposite to the second magnetic circuit portion 23, the second vibration assembly 32 includes a second diaphragm 321 and a second voice coil 323, the second voice coil 323 is a flat voice coil and has a central axis perpendicular to the second diaphragm 321, the second voice coil 323 is spaced apart from the second magnetic circuit portion 23 along a vibration direction of the second vibration assembly 32, the second voice coil 323 has at least a first wire section 3231 and a second wire section 3232 disposed opposite to each other, a current direction in the first wire section 3231 and the second wire section 3232 is opposite, and a magnetic induction line of the second magnetic circuit portion 23 at least partially or at least partially passes through the first wire section 3231 and the second wire section 3232 along the vibration direction of the first vibration assembly 31, and a direction of the magnetic induction line passing through the first wire section 3231 and the second wire section 3232 is opposite.

In the present embodiment, the yoke plate 21 of the magnetic circuit system 2 provides a mounting and fixing base for the first magnetic circuit portion 22, and the first magnetic circuit portion 22 may be fixedly connected to the yoke plate 21 by bonding. By providing the first magnetic gap 221 in the first magnetic circuit portion 22, a space for avoiding and vibrating the first voice coil is provided by the first magnetic gap 221. By arranging the second magnetic circuit portion 23 on the side of the part of the side magnetic circuit 223 away from the center magnetic circuit 222 and arranging the second voice coil 323 as a flat voice coil with the central axis perpendicular to the second diaphragm 321, at least part of the magnetic induction line of the second magnetic circuit portion 23 or at least part of the component passes through the first wire section 3231 and the second wire section 3232 along the vibration direction of the first vibration assembly 31, thereby providing driving force and vibration space for the second voice coil 323 by using the second magnetic circuit portion 23, the structure of the whole magnetic circuit system 2 is more compact, and the size of the magnetic circuit system 2 is reduced.

In one embodiment, the second magnetic circuit portion 23 includes at least three magnetic regions, and the three magnetic regions include a first magnetic region 231 in the middle and second magnetic regions 232 on both sides, and the arrangement directions of the three magnetic regions are parallel to the vibration direction of the first vibration assembly 31. In this way, the utilization rate of the magnetic circuit system 2 can be improved, the BL value of the second magnetic circuit portion 23 can be improved, and the sound emission performance of the second vibration assembly 32 can be improved.

As shown in fig. 9, the three magnetic regions are magnetized along the vibration direction of the second vibration component 32, and the magnetizing directions of the first magnetic region 231 and the second magnetic region 232 are opposite; alternatively, as shown in fig. 10, the first magnetic region 231 is magnetized along the vibration direction of the second vibration assembly 32, the magnetizing direction of the second magnetic region 232 is perpendicular to the magnetizing direction of the first magnetic region 231, and the magnetic pole of the side of the second magnetic region 232 close to the first magnetic region 231 is the same as the magnetic pole of the side of the first magnetic region 231 close to the second voice coil 323. So that the first wire section 3231 and the second wire section 3232 vibrate along the same direction to drive the second diaphragm 321 to vibrate and sound.

Alternatively, as shown in fig. 6 to 8, the second magnetic circuit portion 23 includes one bar magnet 233, and the three magnetic regions are three-part magnetized regions of the bar magnet 233; alternatively, the second magnetic circuit portion 23 includes three mutually independent bar magnets 233, the arrangement direction of the three bar magnets 233 being parallel to the vibration direction of the first vibration assembly 31, the three bar magnets 233 forming three magnetic areas correspondingly; alternatively, the second magnetic circuit portion 23 includes a ring magnet 234 and a bar magnet 233, the center axis of the ring magnet 234 is parallel to the center axis of the second voice coil 323, the bar magnet 233 is provided at the center of the ring magnet 234, the bar magnet 233 forms the first magnetic region 231, and the opposite sides of the ring magnet 234 form the second magnetic region 232. It can be appreciated that the bar magnet 233 has a simple structure, is convenient to process, has a strong structural strength of the ring magnet 234, and improves the structural reliability thereof. The second magnetic circuit portion 23 of the present sound emitting device 100 may be configured in different ways and may be flexibly selected during use.

In one embodiment, as shown in fig. 4, the second magnetic circuit portion 23 is provided on the yoke plate 21 and on the same side of the yoke plate 21 as the first magnetic circuit portion 22. In the present embodiment, the yoke plate 21 provides a mounting and fixing base for the first magnetic circuit portion 22 and the second magnetic circuit portion 23, the first magnetic circuit portion 22 and the second magnetic circuit portion 23 are provided on the side of the yoke plate 21 facing the housing 1, and the magnetic circuit system 2 is connected to the first casing 12 and the second casing 13 of the housing 1 through the first magnetic circuit portion 22 and the second magnetic circuit portion 23.

It will be appreciated that the first magnetic circuit portion 22 and the second magnetic circuit portion 23 may be adhesively or otherwise attached to the yoke plate 21, without limitation.

In one embodiment, as shown in fig. 5, a magnetic conductive plate 235 is further provided on the side of the second magnetic circuit portion 23 remote from the second voice coil 323. The BL value of the second magnetic circuit portion 23 can be further raised, and the driving force to the second voice coil 323 can be raised.

In one embodiment, the yoke plate 21 is flat, so that the shape of the sound generating device 100 is more regular, and the adaptability of the sound generating device 100 for different installation environments is enhanced. Preferably, the yoke plate 21 is disposed flush away from the outer surface of the first vibration assembly 31 and the outer surface of the housing 1.

In one embodiment, as shown in fig. 5, the size of the second magnetic circuit portion 23 is larger than the size of the first magnetic circuit portion 22 in the vibration direction of the first vibration assembly 31. The second magnetic circuit portion 23 can be provided by making full use of the height dimension of the sound emitting device 100 in the vibration direction of the first vibration assembly 31, the size of the magnetic region of the second magnetic circuit portion 23 can be increased, and the driving force to the second voice coil 323 can be increased.

In an embodiment, the side magnetic circuit 223 includes a first side magnetic circuit 223 and a second side magnetic circuit 223, the first side magnetic circuit 223 is located outside the center magnetic circuit 222 and forms a first sub-gap 2211 at intervals, the second side magnetic circuit 223 is located outside the center magnetic circuit 222 and forms a second sub-gap 2212 at intervals, the first sub-gap 2211 communicates with the second sub-gap 2212 to form a first magnetic gap 221, and the second magnetic circuit portion 23 is located on a side of the second side magnetic circuit 2232 away from the center magnetic circuit 222.

It will be appreciated that the side magnetic circuit 223 includes a plurality of side magnetic circuits 223 disposed around the center magnetic circuit 222 and spaced apart from the center magnetic circuit 222 to form the first magnetic gap 221, and that the plurality of side magnetic circuits 223 includes a first side magnetic circuit 2231 and a second side magnetic circuit 2232. For example, side magnetic circuit 223 includes four, one being second side magnetic circuit 2232 and three being first side magnetic circuit 2231. It can be appreciated that the three first side magnetic circuits 2231 are spaced apart from the central magnetic circuit 222 to form a first sub-gap 2211, the second side magnetic circuit 2232 is positioned on a side of the first common magnetic circuit facing away from the central magnetic circuit 222 to form a second sub-gap 2212, and the first sub-gap 2211 is in communication with the second sub-gap 2212 to form the first magnetic gap 221.

In this embodiment, only the side of the second side magnetic circuit 2232 away from the center magnetic circuit 222 is used to provide the second magnetic circuit portion 23, so that the size of the sound emitting device 100 along the axial direction of the second voice coil 323 is further reduced on the basis of satisfying the magnetic circuit performance, which is beneficial to the miniaturization development of the sound emitting device 100.

Further, as shown in fig. 5, the size of the second side magnetic circuit 2232 is equal to or smaller than the size of the first side magnetic circuit 2231 opposed to the second side magnetic circuit 2232 and equal to or larger than half the size of the first side magnetic circuit 2231 opposed to the second side magnetic circuit 2232 in the vibration direction of the second voice coil 323. In this way, the installation space for the second magnetic circuit portion 23 can be made available, without excessively increasing the size of the magnetic circuit system 2 in the vibration direction of the second voice coil 323, by the miniaturized design of the sound generating device 100.

Alternatively, the size of the second magnetic circuit portion 23 is equal to or smaller than half the size of the second side magnetic circuit 2232 in the axial direction of the second voice coil 323, that is, in the vibration direction of the second vibration member 32. In this way, a sufficient driving force can be provided to the second voice coil 323 without additionally increasing the size of the sound emitting device 100.

Alternatively, as shown in fig. 11, the side of the second magnetic circuit portion 23 remote from the second voice coil 323 is also provided with a metal plate 236, and the metal plate 236 includes a carrying portion 2361 carrying the second magnetic circuit portion 23 and a fixing portion 2362 connected to the housing 1. The metal plate 236 is further connected with the housing 1 and carries the second magnetic circuit portion 23, so that the connection strength between the second magnetic circuit portion 23 and the housing 1 is enhanced, and the mounting reliability of the second magnetic circuit portion 23 is improved. Optionally, the metal plate 236 is made of stainless steel or the like. Alternatively, the fixing portion 2362 is bent and extended from the edge of the carrying portion 2361 toward the side of the second voice coil 323, and the fixing portion 2362 is embedded in the housing 1.

In an embodiment, the folded ring of the first diaphragm 311 is recessed toward the magnetic circuit system 2, and a corner (not labeled in the figure) of the folded ring avoiding the first diaphragm 311 is disposed on a side of the second magnetic circuit portion 23 near the first diaphragm 311. It can be appreciated that in the present embodiment, the second magnetic circuit portion 23 fully utilizes the height space of the sound generating device 100 to meet the maximization of the second magnetic circuit portion 23, and at the same time, avoid the mutual interference with the first vibration assembly 31, so as to improve the sound quality and operational reliability of the sound generating device 100.

In one embodiment, as shown in fig. 3 and fig. 6 to fig. 8, the first wire segment 3231 and the second wire segment 3232 are long axis segments of the second voice coil 323, and the arrangement direction of the first wire segment 3231 and the second wire segment 3232 is parallel to the vibration direction of the first vibration component 31. The two long shaft sections of the second voice coil 323 are arranged along the vibration direction of the first vibration component 31, so that the structural design of the sound generating device 100 can be optimized, the height dimension of the sound generating device 100 can be reduced, and the thinning of the sound generating device 100 is facilitated.

As shown in fig. 3 and 4, the yoke plate 21 is flat, the yoke plate 21 is provided with a recess 211, and the second magnetic circuit portion 23 is provided in the recess 211. The yoke plate 21 is flat, so that the appearance of the sound generating device 100 is more regular, and the adaptability of the sound generating device 100 is enhanced. The yoke may be further provided with a recess 211 accommodating the second magnetic circuit portion 23, and the thickness of the second magnetic force portion is compensated by the height of the recess 211, thereby enhancing the driving force of the second magnetic circuit portion 23 to the second voice coil 323.

In an embodiment, the second diaphragm 321 is a planar diaphragm, and the manufacturing process of the planar diaphragm is simple, so as to reduce the production cost. Optionally, the planar vibrating diaphragm is made of any one of PEN, LCP, PEEK, carbon paper and magnesium-lithium alloy, and has high rigidity and low density, so that the manufactured planar vibrating diaphragm has light weight and improves the sounding performance of the planar vibrating diaphragm. Further alternatively, the central area of the planar vibrating diaphragm is provided with a reinforcing part, so that the rigidity of the planar vibrating diaphragm can be further improved, the sound production performance of the planar vibrating diaphragm is improved, and the reinforcing part is made of any one of PEN, LCP, PEEK, carbon paper and magnesium-lithium alloy. Flexibly selected according to the requirement.

Alternatively, the second diaphragm 321 includes a second ring and a second reinforcing portion 322 disposed in the center of the second ring, so after the material and thickness of the second reinforcing portion 322 are determined, the width or material of the second ring can be further adjusted to adjust the resonant frequency to meet the requirement.

As shown in fig. 3 and 4, the first diaphragm 311 of the sound generating device of the present application includes a first ring and a first reinforcing portion 314, and the first reinforcing portion 314 is connected to a central area of the first ring. The resonant frequency of the first diaphragm 311 can be adjusted by adjusting the width or the material of the first ring to meet the requirement. Further, the first voice coil 312 is a ring-shaped voice coil, and the first voice coil 312 is disposed around the center magnetic circuit 222.

In one embodiment, the aspect ratio of the inner diameter of the second voice coil 323 is less than or equal to 20, so as to reduce the process winding difficulty of the second voice coil 323. Optionally, the second voice coils 323 include a plurality of second voice coils 323, and an aspect ratio of an inner diameter of each second voice coil 323 is 20 or less, and the second voice coils 323 are distributed along an extending direction of the first wire section 3231. It can be understood that, when the dimension of the outline of the sound generating device along the extending direction of the first wire segment 3231 is relatively long, the number of the second voice coils 323 is plural, and correspondingly, the number of the bar magnets 233 or the ring magnets 234 of the second magnetic circuit portion 23 is plural, so that the breaking rate of the bar magnets 233 or the ring magnets 234 can be reduced, and the structural reliability thereof can be improved.

In one embodiment, the second voice coil 323 is formed by winding an enameled wire, or the second voice coil 323 includes a circuit board and a coil structure formed by conductive wires arranged on the circuit board. The flat voice coil has a smaller axial dimension than a conventional annular voice coil, and can further reduce the space occupied by the sound generating device 100 in the vibration direction of the second vibration assembly 32.

In one embodiment, the yoke plate 21 is provided with a vent hole 212, the vent hole 212 is communicated with the first magnetic gap 221, and the sound generating device 100 further includes an isolation net corresponding to the vent hole 212. The air pressure balance of the vibration space within the sound emitting device 100 can be ensured to ensure the vibration balance of the first vibration assembly 31 and the second vibration assembly 32. The isolation net covers the air leakage holes 212, so that impurities or sound absorbing particles and the like can be prevented from entering the sound production device 100 from the air leakage holes 212, and the performance of the sound production device 100 is prevented from being influenced.

In an embodiment, the first vibration assembly 31 further includes a centering support 313, one end of the centering support 313 is connected to the first housing 12, and the other end of the centering support 313 is connected to an end of the first voice coil 312 away from the first diaphragm 311. The vibration of the first voice coil 312 is balanced and stabilized by the centering support 313, and the first voice coil 312 is prevented from swinging or polarizing.

Alternatively, the centering support 313 includes four centering support 313 corresponding to four notches of the first magnetic circuit portion 22 of the magnetic circuit system 2. Alternatively, as shown in fig. 3, the centering support 313 includes two centering support 313 provided on both sides of the short axis of the first voice coil 312. In the present embodiment, the centering support 313 includes an outer fixing portion 2362, an inner fixing portion 2362, and an elastic portion connected between the outer fixing portion 2362 and the inner fixing portion 2362, the outer fixing portion 2362 is connected to the first case 12 of the housing 1, and the inner fixing portion 2362 is connected to the first voice coil 312.

The centering support 313 can be made of PI materials, or the centering support 313 can be made of FPCB, or a conductive circuit is arranged in the centering support 313, so that one end of the centering support 313 can be connected with a lead wire of the first voice coil 312 in a conductive manner, the other end of the centering support 313 is fixed on the shell 1 and used for being connected and conducted with an external circuit, and the centering support 313 is used for connecting and conducting the external circuit with the first voice coil 312, so that the lead wire of the first voice coil 312 is effectively prevented from being broken in the vibration process.

In one embodiment, as shown in fig. 3, 6 and 14 to 15, the outer end of the centering support 313 is connected to the surface of the first housing 12 facing away from the first diaphragm 311, the inner end of the centering support 313 is connected to the end of the first voice coil 312 facing away from the first diaphragm 311, the inner end has a first inner pad electrically connected to a lead of the first voice coil 312, and the outer end has a first outer pad 3132 electrically connected to an external circuit; the casing 1 is provided with a conductive insert 15, the conductive insert 15 is provided with a second inner bonding pad 151 electrically connected with the second voice coil 323 and a second outer bonding pad 152 electrically connected with an external circuit, the second inner bonding pad 151 is exposed on the surface of the second casing 13 facing the second diaphragm 321, the second outer bonding pad 152 is exposed on the surface of the first casing 12 facing away from the first diaphragm 311, and further, the first outer bonding pad 3132 and the second outer bonding pad 152 are positioned on the same side edge of the first casing 12. In this embodiment, the first outer pad 3132 and the second outer pad 152 are located on the same side of the first housing 12, and when the first outer pad 3132 and the second outer pad 152 are electrically connected to an external electrical connector (e.g., a flexible circuit board), the design of the external electrical connector can be simplified, and implementation is easy.

In this embodiment, as shown in fig. 6 and 14, a lead groove 132 is provided on the surface of the second housing 13 connected to the second diaphragm 321, and the lead wire of the second voice coil 323 is led out through the lead groove 132 and then connected to the second inner pad 151. Thus, the lead wire of the second voice coil 323 is led out through the lead wire groove 132, so that the flatness of the bonding surface of the second housing 13 and the second diaphragm 321 can be maintained, the bonding strength of the second housing 13 and the second diaphragm 321 is improved, and the waterproof performance of the second diaphragm 321 is improved.

As shown in fig. 14 and 15, the first housing 12 and the second housing 13 have a common edge 14, the conductive insert 15 includes two conductive inserts, wherein one conductive insert 15 is disposed on the common edge 14 and has two ends respectively forming a second outer bonding pad 152 exposed to the first housing 12 and a second inner bonding pad 151 exposed to the second housing 13, one end of the other conductive insert 15 is disposed on the common edge 14 and forms a second inner bonding pad 151 exposed to the second housing 13, and the other end extends along the edge of the first housing 12 to the side where the first outer bonding pad 3132 is located. The conductive insert 15 is embedded in the housing 1, so that the mounting reliability thereof can be improved.

Alternatively, the second housing 13 includes two long sides and two short sides alternately connected, the second inner pad 151 includes two and is located at both ends of the second housing 13 along an extension direction of one long side, and the outer edge of the second diaphragm 321 along the extension direction of the long side is located inside the two second inner pads 151. That is, the two second inner pads 151 are symmetrically disposed at both ends of the long side of the second diaphragm 321, and in case that the size of the housing 1 of the sound emitting device 100 is relatively small, the design of the first pad is simplified, so that the process is facilitated. Further, a lead groove 132 is provided on a surface of the second housing 13 connected to the second diaphragm 321, and a lead wire of the second voice coil 323 is led out through the lead groove 132 and then connected to the second inner pad 151, and the second diaphragm 321 covers the lead groove 132.

To improve the waterproof performance of the sound generating device 100 of the present invention, the outer edge of the first diaphragm 311 and the outer edge of the second diaphragm 321 are at least partially overlapped. Specifically, as shown in fig. 3 and 4, and fig. 12 and 13, the first housing 12 and the second housing 13 have a common edge 14, and the first diaphragm 311 and the second diaphragm 321 are connected to the common edge 14, and an outer edge of a side of the first diaphragm 311 near the second diaphragm 321 is at least partially overlapped with an outer edge of a side of the second diaphragm 321 near the first diaphragm 311.

In an embodiment, the outer edge of the second diaphragm 321 has a second flange 3211 connected to the second housing 13, and the second flange 3211 opposite to the common edge 14 is at least partially overlapped with the outer edge of the first diaphragm 311. The second flange 3211 may increase the adhesion area between the second diaphragm 321 and the second casing 13, thereby improving the waterproof performance of the second diaphragm 321.

Optionally, the second flange 3211 corresponding to the common edge 14 is provided with a second countersink 141, so that the thickness of the housing wall of the common edge 14 can be reduced, and when the first diaphragm 311 and the second diaphragm 321 are bonded to the common edge 14, the outer surface of the sound generating device 100 is smoother.

Optionally, the outer edge of the side of the first diaphragm 311 near the second diaphragm 321 is disposed between the common edge 14 and the second flange 3211, so that when external liquid enters the sound generating device 100, the path entering the sound generating device 100 is prolonged and the risk of entering the sound generating device 100 is reduced because the external liquid needs to pass through the bonding area between the second flange 3211 and the first diaphragm 311 and the bonding area between the first diaphragm 311 or the second diaphragm 321 and the common edge 14.

Optionally, the outer edges of the two long sides of the second diaphragm 321 are provided with second flanges 3211, and the common edge 14 is opposite to the long sides of the second diaphragm 321. The second flange 3211 is provided on the long side of the second diaphragm 321 and combined with the outer edge of the first diaphragm 311, so as to further improve the waterproof performance of the sound generating device 100.

In another embodiment, the outer edge of the first diaphragm 311 has a first flange (not shown) connected to the first housing 12, and the first flange opposite to the common edge 14 is at least partially overlapped with the outer edge of the second diaphragm 321. The first flanging is arranged to increase the bonding area of the first vibrating diaphragm 311 and the first shell 12, so that the waterproof performance of the first vibrating diaphragm 311 is improved.

Optionally, the common edge 14 is provided with a first countersink (not shown) corresponding to the first flange, so that the thickness of the housing wall of the common edge 14 can be reduced, and when the first diaphragm 311 and the second diaphragm 321 are bonded to the common edge 14, the outer surface of the sound generating device 100 is smoother.

Optionally, the outer edge of the second diaphragm 321 near the side of the first diaphragm 311 is disposed between the common edge 14 and the first flange. In this way, when the external liquid enters the sound generating device 100, the path entering the sound generating device 100 is prolonged and the risk of entering the sound generating device 100 is reduced through the combination area of the first flange and the second diaphragm 321 and the combination area of the first diaphragm 311 or the second diaphragm 321 and the common edge 14.

In yet another embodiment, the outer edge of the second diaphragm 321 has a second flange 3211 connected to the second housing 13, and the outer edge of the first diaphragm 311 has a first flange connected to the first housing 12, and the first flange and the second flange 3211 are both connected to the common edge 14. The second flange 3211 can increase the bonding area between the second diaphragm 321 and the second casing 13, and the first flange can increase the bonding area between the first diaphragm 311 and the first casing 12, so as to improve the waterproof performance of the first diaphragm 311.

Optionally, a first flange opposite to the common edge 14 is disposed between the common edge 14 and the second diaphragm 321, so as to prolong the path of the external liquid entering the sound generating device 100 from the bonding area between the first diaphragm 311 and the common edge 14. Alternatively, the second flange 3211 opposite to the common edge 14 is disposed between the first diaphragm 311 and the common edge 14, so as to extend a path of the external liquid from the bonding area between the second diaphragm 321 and the common edge 14 into the sound generating device 100. Without limitation, it is flexibly selected according to the assembly condition.

Optionally, the common edge 14 is provided with a first countersink corresponding to the first flange, or the common edge 14 is provided with a second countersink 141 corresponding to the second flange 3211, or the common edge 14 is provided with a first countersink corresponding to the first flange and a second countersink 141 corresponding to the second flange 3211. The thickness of the housing wall of the common edge 14 can be reduced, and the outer surface of the sound emitting device 100 is smoother when both the first diaphragm 311 and the second diaphragm 321 are bonded to the common edge 14.

In this sound generating device 100, the vibration direction of the first vibrating diaphragm 311 is perpendicular to the vibration direction of the second vibrating diaphragm 321, so that the installation of the first voice coil 312 and the second voice coil 323 is facilitated, and the magnetic force system is more regular, which is beneficial to production.

In the present sound generating device 100, the size of the sound generating device 100 in the vibration direction of the first diaphragm 311 is smaller than the size of the sound generating device 100 in the vibration direction of the second diaphragm 321. Thus, the sound generating device 100 is in a flat structure, and is convenient for the thin design of the application end when being adapted to the application end, so that the use experience of a user is improved.

In the sound generating device 100 of the present invention, the first vibration component 31 is used for bass sound production, and the second vibration component 32 is used for treble sound production, so that the bandwidth of the sound generating device 100 can be expanded, and the tone of the sound generating device 100 is more full and round.

As shown in fig. 16 to 21, the present invention further provides a sound generating module 400, where the sound generating module 400 includes the sound generating device 100 and a module housing, the module housing has an accommodating space, a sound generating unit is accommodated in the accommodating space, the module housing has a supporting wall 412 and a sound emitting portion 411 connected to the supporting wall 412, one side of the sound generating device 100 provided with the first vibration component 31 is connected to the supporting wall 412, one side of the sound generating device 100 provided with the second vibration component 32 is connected to the sound emitting portion 411, and the sound emitting portion 411 transmits the sound wave of the first vibration component 31 and the sound wave of the second vibration component 32 to the outside.

In this embodiment, as shown in fig. 20 to 21, the sound generating device 100 is disposed in the accommodating space and forms a rear acoustic cavity (not labeled in the drawings) with the module housing, and the sound absorbing particles can be further filled into the rear acoustic cavity, so as to effectively improve the low-frequency performance and the acoustic performance of the sound generating module 400.

In this embodiment, through setting up first vibration subassembly 31 and second vibration subassembly 32 on sound generating device 100 for the direction of vibration of first vibration subassembly 31 is the contained angle setting with the direction of vibration of second vibration subassembly 32, radiates the sound wave of first vibration subassembly 31 and second vibration subassembly 32 to the external world through play sound part 411, has widened the frequency band of sound generating module 400, makes sound generating module 400's sound richer, more full.

Alternatively, as shown in fig. 16 to 21, the sound outlet 411 is located on the peripheral side of the module housing, the sound outlet 411 is opposite to and communicates with the second vibration assembly 32, the sound wave of the second vibration assembly 32 is radiated outwards through the sound outlet 411, the first front cavity 40 is formed between the first vibration assembly 31 and the module housing, the support wall 412 is provided with a first fracture 4121, the first front cavity 40 communicates with the sound outlet 411 through the first fracture 4121, and the sound wave of the first vibration assembly 31 is radiated outwards through the first front cavity 40, the first fracture 4121 and the sound outlet 411. Thus, the sound waves of the first vibration component 31 and the second vibration component 32 are radiated from the sound emitting portion 411 to the outside, so that the frequency band of the sound emitting module 400 is widened, and the sound emitting effect is improved. Optionally, a dust screen is further disposed on the sound emitting portion 411 to prevent external dust or impurities from entering the interior of the sound emitting portion 411 to affect the sound emitting effect.

As a specific embodiment, the sound outlet 411 has a first sound outlet channel 4111 and a second sound outlet channel 4112, where the first sound outlet channel 4111 and the second sound outlet channel 4112 are isolated, the first sound outlet channel 4111 is opposite to and communicated with the second vibration component 32, and the sound wave of the second vibration component 32 is radiated outwards through the first sound outlet channel 4111; the first fracture 4121 is in communication with the second sound outlet channel 4112, and sound waves of the first vibration assembly 31 radiate outwardly through the first front cavity 40, the first fracture 4121, and the second sound outlet channel 4112. It can be understood that the first sound outlet channel 4111 and the second sound outlet channel 4112 are hollow, so that the sound emitted from the second vibration assembly 32 can be smoothly emitted through the first sound outlet channel 4111, and the sound emitted from the first vibration assembly 31 can be smoothly emitted through the second sound outlet channel 4112, thereby improving the sound effect of the sound generating module 400.

In the present embodiment, the first sound outlet channel 4111 and the second sound outlet channel 4112 are isolated from each other, that is, the sound wave of the first vibration component 31 and the sound wave of the second vibration component 32 radiate outwards through different radiation paths, so that the space between the first vibration component 31 and the second vibration component 32 and the module housing is separated into different radiation paths, which can improve the high-frequency performance of the sound module 400.

Optionally, the second sound outlet channels 4112 include two second sound outlet channels 4112, and the two second sound outlet channels 4112 are respectively disposed on opposite sides of the first sound outlet channel 4111, so that the first sound outlet channel 4111 faces the second vibration assembly 32, which is convenient for the sound waves of the second vibration assembly 32 to radiate directly to the outside, and improves the high-frequency performance of the sound generating module 400. It can be appreciated that the first fracture 4121 and the first sound outlet channel 4111 are isolated from each other, and the first fracture 4121 is divided into two parts located at two sides of the first sound outlet channel 4111, and respectively communicates with one second sound outlet channel 4112. Optionally, the second sound outlet channel 4112 and the first sound outlet channel 4111 are flared, and the caliber of the side of the second sound outlet channel away from the sound generating device 100 is larger than the caliber of the side of the second sound outlet channel close to the sound generating device 100. Of course, in other embodiments, the second sound outlet channel 4112 may be one, which is not limited herein.

Optionally, an acoustic duct 43 is disposed between the acoustic outlet 411 and the second vibration component 32, where the acoustic duct 43 is connected to the periphery of the second vibration component 32 and is correspondingly communicated with the first acoustic outlet 4111, and the acoustic wave of the second vibration component 32 is radiated outwards through the acoustic duct 43 and the first acoustic outlet 4111; a first avoiding channel 44 is arranged between the sound outlet 411 and the sound guide pipeline 43, the first avoiding channel 44 is opposite to and communicated with the first fracture 4121, and sound waves of the first vibration assembly 31 radiate outwards through the first front cavity 40, the first fracture 4121, the first avoiding channel 44 and the second sound outlet channel 4112. It can be understood that the sound guide pipe 43 is hollow, so that the sound emitted by the second vibration assembly 32 can be smoothly transmitted through the sound guide pipe 43, and the sound emitting effect of the sound emitting module 400 is improved. It will be appreciated that the inner wall of the sound outlet 411 is connected to the outer wall of the sound guide duct 43, and the first escape passage 44 is formed between the sound guide duct 43 and the sound outlet 411, specifically, between the inner wall of the sound outlet 411 and the outer wall of the sound guide duct 43. As shown in fig. 18, the first escape passage 44 is formed by recessing the inner wall forming the second sound outlet passage 4112 in a direction away from the second vibration assembly 32 with respect to the inner wall forming the first sound outlet passage 4111. Of course, in other embodiments, a portion of the outer wall of the sound guiding channel 43 corresponding to the second sound outlet channel 4112 may be concavely formed in a direction approaching the second vibration assembly 32, so as to form a first avoiding channel 44 communicating with the first fracture 4121 therebetween.

In this embodiment, the sound guiding pipeline 43 is disposed between the sound emitting portion 411 and the second vibration component 32, that is, the sound guiding pipeline 43 is disposed between the sound emitting device 100 and the module housing, so that the sound emitting device 100 can be adapted to different assembly environments only by replacing the sound guiding pipeline 43 in the assembly and use process of the sound emitting device 100, and the different module 400 housings 1 can be matched, so that the design of the sound emitting device 100 can be liberated.

Optionally, as shown in fig. 17, 20 and 21, a sealing foam 45 is disposed on a surface of the sound guiding tube 43 far from the second vibration component 32, so as to improve tightness between the sound guiding tube 43 and an external device, and improve a sound quality effect of the sound generating module 400. It will be appreciated that the sealing foam 45 is annular, and the sealing foam 45 has a first escape groove 451 in communication with the second sound outlet channel 4112.

Optionally, the side of the sound guiding tube 43 away from the second vibration assembly 32 is an inclined surface, i.e. an angle is formed between the inclined surface and the mounting surface of the second vibration assembly 32. Thus, the assembly between the sound emitting device 100 and the module housing is facilitated, and the inclined surface of the sound guide pipe 43 can be fastened by force while the sound emitting device 100 is assembled in the vibration direction of the first vibration assembly 31, so that the operability of the sound emitting device 100 during assembly is improved. Further, the distance between the end of the inclined surface close to the first vibration assembly 31 and the second vibration assembly 32 is smaller than the distance between the end of the inclined surface far from the first vibration assembly 31 and the second vibration assembly 32.

In an embodiment of the present invention, the module housing includes a module upper case 42 and a module lower case 41, the module lower case 41 and the module upper case 42 are connected and enclosed into a receiving space, the module lower case 41 is provided with a supporting wall 412 and an acoustic emitting portion 411, and a rear acoustic cavity is formed among the module lower case 41, the acoustic device 100, the module upper case 42 and the module lower case 41. In this embodiment, as shown in the drawing, the module housing is configured as a two-part structure of the module lower case 41 and the module upper case 42, so that the installation and fixation of the sound emitting device 100 are facilitated, and the module upper case 42 and the module lower case 41 can be fixed by means of bonding, welding, etc., which is not limited herein.

The present application also provides an electronic device comprising a device housing and the sound emitting device 100 of the present application. Specifically, the sound generating device 100 has a frequency division point F1, and when the sound generating device 100 is used in an electronic apparatus, fh (front cavity resonance frequency) corresponding to the first vibration component 31 is equal to or greater than 4kHz and equal to or less than 7kHz, and F1 > Fh. In this way, abrupt phase changes of the sound waves of the first vibration assembly 31 and the second vibration assembly 32 at the frequency division point F1 can be avoided, and consistent vibration phases of the first vibration assembly 31 and the second vibration assembly 32 at the frequency division point F1 can be ensured, and the sound pressure of the sound emitting device 100 is stable.

Optionally, F1 is greater than or equal to 6kHz, so that the sound pressure level curve of the sound emitting device 100100 formed by combining the first vibration component 31 and the second vibration component 32 is smoother, and no larger dip is generated, and the hearing feeling is natural.

Further, the division point F1 is 6kHz or more and 10kHz or less, and the division point F1 may be 6kHz, 6.5kHz, 7kHz, 7.5kHz, 8kHz, 8.5kHz, 9kHz, 9.5kHz, 10kHz, or the like. Thus, the sound pressure levels of the first vibration component 31 and the second vibration component 32 can be better joined at the frequency division point, and the sound quality is richer and natural. The sounding device 100 in this embodiment has deep and powerful bass and rich high-definition. The electronic device adopts all the technical schemes of all the embodiments, so that the electronic device has at least all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A sound generating device is characterized by comprising a shell, a magnetic circuit system and a vibration system which are connected with the shell,

2. The sound emitting device of claim 1 wherein the second magnetic circuit portion comprises a bar magnet and the three magnetic regions are three-part magnetized regions of the bar magnet;

3. The sound emitting device of claim 1, wherein the side magnetic circuit comprises a first side magnetic circuit and a second side magnetic circuit, the first side magnetic circuit being located outside the center magnetic circuit and spaced apart to form a first sub-gap, the second side magnetic circuit being located outside the center magnetic circuit and spaced apart to form a second sub-gap, the first sub-gap being in communication with the second sub-gap to form the first magnetic gap, the second magnetic circuit portion being located on a side of the second side magnetic circuit remote from the center magnetic circuit.

4. The sound emitting device of claim 3, wherein 0.5 x the size of the first side magnetic circuit opposite the second side magnetic circuit along the vibration direction of the second vibration assembly is equal to or less than the size of the first side magnetic circuit opposite the second side magnetic circuit;

5. The sound emitting device of claim 1, wherein the first wire segment and the second wire segment are long axis segments of the second voice coil, and an arrangement direction of the first wire segment and the second wire segment is parallel to a vibration direction of the first vibration assembly.

6. The sound generating device of claim 1, wherein the second diaphragm is a planar diaphragm, or the second diaphragm includes a second ring and a second reinforcing portion disposed at a center of the second ring;

and/or, the second voice coil is formed by coiling enamelled wires, or comprises a circuit board and a coil structure formed by conductive circuits arranged on the circuit board;

and/or the second voice coil comprises a plurality of second voice coils, and the plurality of second voice coils are arranged along the extending direction of the first wire segment;

and/or the aspect ratio of the inner diameter of the second voice coil is less than or equal to 20.

7. The sound generating device of claim 1, wherein the second diaphragm is a planar diaphragm, and the planar diaphragm is made of any one of PEN, LCP, PEEK, carbon paper and magnesium-lithium alloy;

8. The sound generating device of claim 1, wherein the housing comprises a first housing and a second housing disposed at an included angle, the first housing and the second housing enclosing to form a mounting cavity, the magnetic circuit system being disposed in the mounting cavity, the first diaphragm being coupled to the first housing, the second diaphragm being coupled to the second housing;

9. The sound emitting device of any one of claims 1-8, wherein the first vibration assembly is for bass sound and the second vibration assembly is for treble sound;

10. An electronic device comprising a device housing and a sound emitting device according to any one of claims 1 to 9, wherein the sound emitting device is provided in the device housing.