CN119421090A - Sound generating devices and electronic equipment - Google Patents

Abstract

The present invention discloses a sound-generating device and an electronic device, and relates to the technical field of electroacoustic transducer. The sound-generating device includes a magnetic circuit system and a vibration system. The central magnetic part of the magnetic circuit system includes two central magnetic groups, and the side magnetic part includes an outer magnetic group located outside the two central magnetic groups and a common magnetic group located between the two central magnetic groups. The outer magnetic group and the common magnetic group are both spaced apart from each central magnetic group to enclose and form two magnetic gaps set apart. Each central magnetic group includes a first central magnet, a central magnetic plate and a second central magnet arranged in a stacked manner. The outer magnetic group and the common magnetic group both include a first side magnet, a side magnetic plate and a second side magnet arranged in a stacked manner. The vibration system includes a diaphragm and two voice coils, and each voice coil is arranged corresponding to a magnetic gap. The sound-generating device of the present invention optimizes the magnetic circuit system and adopts a double voice coil to further improve the utilization rate of the magnetic circuit system, thereby improving the loudness and sensitivity of the sound-generating device.

Description

Sound producing device and electronic equipment

Technical Field

The present invention relates to electroacoustic transduction, and more particularly, to a sound generating device and an electronic device using the sound generating device.

Background

In recent years, portable electronic devices (e.g., mobile phones, headphones, computers) have been put into daily life. Along with the rapid development of technology, the popularity of the loudspeaker is higher, the requirements of people on the loudspeaker are not only limited to the playing of video and audio, but also have higher requirements on the tone quality and reliability of the sound played by the loudspeaker, and the loudspeaker is directly related to the tone quality of the played sound and the stability of products.

In the related art, micro-speakers applied to electronic devices such as a tablet computer and a notebook computer are usually large in size, but existing large-size ultrathin speakers usually adopt a single-tone ring scheme, so that the magnetic energy utilization rate of a central magnetic middle area in a magnetic circuit system is low and cannot be effectively utilized, and the loudness and sensitivity of the micro-speakers are affected.

Disclosure of Invention

The invention mainly aims to provide a sound generating device and electronic equipment, and aims to provide the sound generating device which effectively utilizes a magnetic circuit system.

To achieve the above object, the present invention provides a sound emitting device including:

The magnetic circuit system comprises a magnetic guide yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part and the side magnetic part are arranged on the magnetic guide yoke, the central magnetic part comprises two central magnetic groups arranged at intervals, the side magnetic part comprises an outer magnetic group positioned at the outer sides of the two central magnetic groups and a shared magnetic group positioned between the two central magnetic groups, the outer magnetic group and the shared magnetic group are spaced from each central magnetic group to form two magnetic gaps arranged at intervals in a surrounding manner, each central magnetic group comprises a first central magnet, a central magnetic guide plate and a second central magnet which are arranged in a laminated manner, the outer magnetic group and the shared magnetic group comprise a first side magnet, a side magnetic guide plate and a second side magnet which are arranged in a laminated manner, and

The vibration system comprises a vibrating diaphragm and two voice coils connected with the vibrating diaphragm, the vibrating diaphragm is provided with an inner annular hole, the vibrating diaphragm is wound on the outer side of the magnetic circuit system, in the vibration direction along the vibration system, the two side surfaces of the vibrating diaphragm do not exceed the two side surfaces of the magnetic circuit system, and each voice coil is correspondingly arranged with one magnetic gap;

The first center magnet, the center magnetic conduction plate and the second center magnet are respectively in one-to-one correspondence with the first side magnet, the side magnetic conduction plate and the second side magnet in the vibration direction perpendicular to the vibration system.

In one embodiment, the first center magnet and the second center magnet are magnetized along the vibration direction of the vibration system, and the magnetic poles of the first center magnet and the second center magnet close to the center magnetic conduction plate are the same;

the first side magnet and the second side magnet are magnetized along the vibration direction of the vibration system, and the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conduction plate are the same;

The magnetic poles of the first center magnet and the second center magnet close to the center magnetic conduction plate are opposite to the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conduction plate.

In an embodiment, the magnetic circuit system is provided with an avoidance gap communicated with each magnetic gap, the vibration system further comprises a framework, one end of the framework is connected with the vibrating diaphragm, and the other end of the framework penetrates through the avoidance gap to be connected with each voice coil.

In an embodiment, the number of the skeletons is two, the vibrating diaphragm is provided with two long shaft edges and two short shaft edges which are connected end to end, the two central magnetic groups are arranged at intervals along the direction of the long shaft edges, the two skeletons are arranged at intervals along the short shaft edges and are symmetrically arranged, and each skeleton is correspondingly connected with one end of each voice coil.

In an embodiment, the skeleton includes a first connecting portion, a plurality of connecting arms, and a plurality of second connecting portions, where the first connecting portion is connected to the diaphragm, the plurality of connecting arms and the plurality of second connecting portions are all located inside the first connecting portion, one ends of the plurality of connecting arms are connected to the first connecting portion and are arranged at intervals, and at least one second connecting portion is connected to one end of the connecting arm far away from the first connecting portion;

The connecting arms penetrate through the avoidance gaps and extend into the magnetic gaps, so that the second connecting portions are connected with the voice coils.

In an embodiment, the vibrating diaphragm includes an inner ring portion, a first ring around the inner ring portion, a straight portion around the first ring, a second ring around the straight portion, and a fixing portion connected to the outer side of the second ring, wherein the straight portion is connected with the frame, and the inner ring portion is formed with an inner ring hole.

In an embodiment, the inner ring portion, the first folding ring, the straight portion, the second folding ring and the fixing portion are integrally formed;

And/or the protruding direction of the first folding ring is the same as or opposite to the protruding direction of the second folding ring;

And/or, the vibrating diaphragm further comprises a reinforcing part, and the reinforcing part is arranged between the straight part and the framework.

In an embodiment, the arrangement direction of the two central magnetic groups is defined as a first direction, the outer magnetic groups include a first portion arranged on two sides of the two central magnetic groups along the first direction and a second portion arranged on two sides of the two central magnetic groups along a direction perpendicular to the first direction, and the avoidance gaps are formed between the first portion and the second portion and between the second portion and the common magnetic groups.

In an embodiment, the sound generating device further comprises a housing, the housing is provided with a mounting cavity, and the magnetic circuit system and the vibration system are arranged in the mounting cavity.

In an embodiment, the magnetic conductive yoke includes a first magnetic yoke and a second magnetic yoke that are disposed opposite to each other, the central magnetic portion and the side magnetic portions are disposed between the first magnetic yoke and the second magnetic yoke, the first side magnet and the first central magnet are connected to the first magnetic yoke, and the second side magnet and the second central magnet are connected to the second magnetic yoke.

In an embodiment, the housing is further provided with a first through hole and a second through hole which are communicated with the mounting cavity, the first magnetic yoke is connected to the housing and located in the first through hole, and the second magnetic yoke is connected to the housing and located in the second through hole.

In an embodiment, the sound generating device further includes a support member, the support member has an annular structure, the support member surrounds the magnetic circuit system and is connected with the housing or the magnetic circuit system, the outer ring of the diaphragm is connected with the housing, and the inner ring of the diaphragm is connected with the support member;

and/or, be equipped with the sound hole on the shell, the vibrating diaphragm will the installation cavity of magnetic circuit week side is divided into front chamber and rear chamber, the front chamber with sound hole intercommunication, the rear chamber with the magnetic gap intercommunication.

The invention also proposes an electronic device, the electronic equipment comprises the sounding device.

According to the sound production device, a magnetic circuit system is arranged as a magnetic yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part is arranged as two central magnetic groups which are arranged at intervals, and the side magnetic part is arranged as an outer magnetic group which is positioned outside the two central magnetic groups and a shared magnetic group which is positioned between the two central magnetic groups, so that the outer magnetic group and the shared magnetic group of the side magnetic part are spaced from each central magnetic group to form two magnetic gaps which are arranged at intervals in a surrounding way, and two voice coils of a vibration system are respectively arranged corresponding to the two magnetic gaps, and thus, current is introduced into the two voice coils, so that the two voice coils vibrate in the magnetic fields of the two magnetic gaps formed by the magnetic circuit system and drive a vibrating diaphragm to vibrate and produce sound; meanwhile, each central magnetic group is set to be a first central magnet, a central magnetic guide plate and a second central magnet which are arranged in a stacked manner, and the outer magnetic groups and the common magnetic groups are set to be a first side magnet, a side magnetic guide plate and a second side magnet which are arranged in a stacked manner, so that the first central magnet, the central magnetic guide plate and the second central magnet of the two central magnetic groups are respectively in one-to-one correspondence with the outer magnetic groups of the side magnetic groups and the first side magnet, the side magnetic guide plate and the second side magnet of the common magnetic groups in the vibration direction perpendicular to the vibration system, and thus the two central magnetic groups of the central magnetic part commonly share the common magnetic groups of the side magnetic parts and form two magnetic gaps, the magnetic fields of the central magnetic parts can be fully utilized by the two voice coils, and the magnetic energy utilization rate of the central magnetic parts is improved, and the loudness and the sensitivity of the sounding device are improved, so that the product performance is improved; meanwhile, the vibrating diaphragm is provided with an inner annular hole, the vibrating diaphragm is wound on the outer side of the magnetic circuit system, and in the vibration direction along the vibration system, the two side surfaces of the vibrating diaphragm do not exceed the two side surfaces of the magnetic circuit system, the vibration system and the magnetic circuit system are changed from the traditional vertical arrangement into the horizontal arrangement, so that the thickness (height) of the sound generating device is reduced, and the thin development of the sound generating device is facilitated.

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 cross-sectional view of an embodiment of a sound generating apparatus according to the present invention;

FIG. 2 is an exploded view of an embodiment of a sound emitting device according to the present invention;

FIG. 3 is a schematic cross-sectional view of an embodiment of a magnetic circuit system according to the present invention;

FIG. 4 is an exploded view of an embodiment of a magnetic circuit system according to the present invention;

Fig. 5 is a schematic structural diagram of an embodiment of a skeleton provided by the present invention.

Reference numerals illustrate:

100. The sound generating device comprises a sound generating device body, a shell body, 11, a mounting cavity, 12, a first through hole, 13, a second through hole, 14, a supporting piece, 15, a first shell body, 16, a second shell body, 2, a magnetic circuit system, 21, a magnetic yoke, 211, a first magnetic yoke, 212, a second magnetic yoke, 22, a central magnetic part, 221, a central magnetic group, 2211, a first central magnet, 2212, a central magnetic plate, 2213, a second central magnet, 23, a side magnetic part, 231, an outer magnetic group, 2311, an avoidance gap, 232, a shared magnetic group, 2321, a first side magnet, 2322, a side magnetic plate, 2323, a second side magnet, 24, a magnetic gap, 3, a vibration system, 31, a vibrating diaphragm, 311, an inner ring part, 312, an inner ring hole, 313, a first folding ring, 314, a straight part, 315, a second folding ring, 316, a fixing part, 317, a reinforcing part, 32, a voice coil, 33, a skeleton, 331, a first connecting part, 332, a connecting arm, 333 and a second connecting part.

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 are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are 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.

In recent years, portable electronic devices (e.g., mobile phones, headphones, computers) have been put into daily life. Along with rapid development of technology, popularity of speakers is higher and higher, sound quality requirements of people on electronic devices are also higher and higher, and full-frequency and miniaturization of speakers are mainstream requirements. Meanwhile, the requirements of people on the loudspeaker are not only limited to the playing of video and audio, but also have higher requirements on the tone quality and reliability of the played sound of the loudspeaker, and the loudspeaker is directly related to the tone quality of the played sound and the stability of products.

In the related art, micro-speakers applied to electronic devices such as a tablet computer and a notebook computer are usually large in size, but existing large-size ultrathin speakers usually adopt a single-tone ring scheme, so that the magnetic energy utilization rate of a central magnetic middle area in a magnetic circuit system is low and cannot be effectively utilized, and the loudness and sensitivity of the micro-speakers are affected. The loudness of the micro-speaker cannot meet the requirement generally, so that the utilization rate of the magnet is further improved, and the improvement of the sensitivity of the speaker is an important task.

Based on the above concepts and problems, the present invention proposes a sound generating apparatus 100. It is understood that the sound generating apparatus 100 may be applied to an electronic device, which may be a smart watch, a mobile phone, a tablet, a computer, an earphone, etc., without being limited thereto.

Referring to fig. 1 to 5 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 magnetic circuit system 2 includes a magnetic yoke 21, a central magnetic portion 22 and a side magnetic portion 23 disposed on the magnetic yoke 21, the central magnetic portion 22 includes two central magnetic groups 221 disposed at intervals, the side magnetic portion 23 includes an outer magnetic group 231 disposed outside the two central magnetic groups 221 and a common magnetic group 232 disposed between the two central magnetic groups 221, the outer magnetic group 231 and the common magnetic group 232 are spaced apart from each central magnetic group 221 to form two magnetic gaps 24 disposed at intervals by surrounding, each central magnetic group 221 includes a first central magnet 2211, a central magnetic conductive plate 2212 and a second central magnet 2213 disposed in a stacked manner, each outer magnetic group 231 and the common magnetic group 232 includes a first side magnet 2321, a side magnetic conductive plate 2322 and a second side magnet 2323 disposed in a stacked manner, the vibration system 3 includes a diaphragm 31 and two voice coils 32, 31 connected to the diaphragm 31, and two voice coils 32, 312 are disposed around the outer magnetic circuit 2 and around the magnetic circuit system 31 and are disposed on opposite sides of the diaphragm system, and the two magnetic coils are not disposed on opposite sides of the surface of the diaphragm system, and the two magnetic coils are disposed on the surfaces of the diaphragm 32; the first center magnet 2211, the center magnetic conductive plate 2212, and the second center magnet 2213 are respectively in one-to-one correspondence with the first side magnet 2321, the side magnetic conductive plate 2322, and the second side magnet 2323 in a vibration direction perpendicular to the vibration system 3.

In the present embodiment, the sound generating apparatus 100 is a micro speaker. Alternatively, the magnetic circuit 2 may be provided in a square shape. For example, the magnetic circuit system 2 may include a center magnetic portion 22 and side magnetic portions 23 each having a square structure. The vibration system 3 is optionally arranged in a square. It should be understood that the periphery of the diaphragm 31 of the vibration system 3 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 may be assembled on a housing or a module housing, which is not limited herein.

In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound generating device 100. In one embodiment, as shown in fig. 1 and 2, the sound generating device 100 further includes a housing 1, and the magnetic circuit system 2 and the vibration system 3 are accommodated in the housing 1.

In the present embodiment, the housing 1 is used for mounting, fixing and supporting the components of the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides a mounting base for the components of the magnetic circuit system 2 and the vibration system 3. It will be appreciated that the housing 1 may be a unitary structure or may be formed by a plurality of separate structures, which are not limited herein.

Optionally, the casing 1 may be a frame or a frame structure, that is, the casing 1 has a cavity with two open ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to two sides of the casing 1, so that the magnetic circuit system 2, the casing 1, and the vibration film 31 of the vibration system 3 enclose to form a vibration cavity.

In the present embodiment, the housing 1 may be a BOX structure, that is, the housing 1 has a mounting cavity 11, and the magnetic circuit system 2 and the vibration system 3 are disposed in the mounting cavity 11. It can be understood that the outer periphery of the diaphragm 31 of the vibration system 3 is connected with the housing 1, the center of the diaphragm 31 is provided with a through hole structure for the magnetic circuit system 2 to pass through, and at this time, the center of the diaphragm 31 is connected with the side magnetic part 23 of the magnetic circuit system 2 or other independent supporting parts, which is not limited herein.

It is understood that the sound generating apparatus 100 is applied to an electronic device, that is, the sound generating apparatus 100 may be mounted to the electronic device through the housing 1. It should be noted that, the housing 1 of the sound generating apparatus 100 may be a housing or a box structure independent of the electronic device, and at this time, the magnetic circuit system 2, the vibration system 3, and other components of the sound generating apparatus 100 are integrated into a whole structure by using the housing 1, so as to facilitate disassembly and assembly. Of course, the housing 1 of the sound generating apparatus 100 may be integrally formed with the housing or the case of the electronic device, so as to effectively improve the structural strength and sealing performance, and reduce the size of the electronic device.

In the present embodiment, the housing 1 is used to house the structure of the vibration system 3 and the magnetic circuit system 2, so that the sound generating apparatus 100 can be applied to an electronic device as a single component.

It is understood that by providing the magnetic circuit 2 as the magnetic yoke 21 and the center magnetic portion 22 and the side magnetic portion 23 provided to the magnetic yoke 21, the magnetic circuit 2 may be connected to the housing 1 through the magnetic yoke 21, or the magnetic circuit 2 may be connected to the housing 1 through the side magnetic portion 23, which is not limited herein. In the present embodiment, by arranging the central magnetic portion 22 as two central magnetic groups 221 arranged at intervals, and arranging the side magnetic portion 23 as an outer magnetic group 231 located outside the two central magnetic groups 221 and as a common magnetic group 232 located between the two central magnetic groups 221, the outer magnetic group 231 and the common magnetic group 232 of the side magnetic portion 23 are cooperatively arranged at the peripheral edges of the two central magnetic groups 221, and the outer magnetic group 231 and the common magnetic group 232 of the side magnetic portion 23 are spaced from each central magnetic group 221, so that two magnetic gaps 24 arranged at intervals are formed by enclosing, that is, the two magnetic gaps 24 are located on opposite sides of the common magnetic group 232, and each magnetic gap 24 is arranged around one central magnetic group 221, and the two voice coils 32 are respectively arranged corresponding to the two magnetic gaps 24.

To make electrical connection of the two voice coils 32 to an external circuit. In an embodiment, the vibration system 3 further includes a centering piece or connecting piece or frame 33, one end of the centering piece or connecting piece or frame 33 is connected to the two voice coils 32 and is connected to the leads of the two voice coils 32, and the other end of the centering piece or connecting piece or frame 33 is connected to the housing 1.

It will be appreciated that, taking the centering pad as an example, both ends of the centering pad are electrically connected to the leads of the voice coil 32 and the external circuit, respectively. In this embodiment, a centering support may be provided at the bottom of the voice coil 32, the centering support being located at four corners of the sound emitting device 100 or in the short or long axis direction of the sound emitting device 100. Of course, the centering support may be disposed on top of the voice coil 32, and the centering support is located between the voice coil 32 and the diaphragm 31, which is not limited herein.

In the present embodiment, each central magnetic group 221 of the central magnetic portion 22 is configured as a first central magnet 2211, a central magnetic conductive plate 2212 and a second central magnet 2213 which are stacked, and each of the outer magnetic groups 231 and the common magnetic groups 232 of the side magnetic portion 23 is configured as a first side magnet 2321, a side magnetic conductive plate 2322 and a second side magnet 2323 which are stacked, so that the first central magnet 2211, the central magnetic conductive plate 2212 and the second central magnet 2213 of the central magnetic group 221 are respectively in one-to-one correspondence with the first side magnet 2321, the side magnetic conductive plate 2322 and the second side magnet 2323 of the outer magnetic group 231 and the common magnetic group 232 in a direction perpendicular to the vibration direction of the vibration system 3, and thus the two central magnetic groups 221 of the central magnetic portion 22 commonly share the common magnetic group 232 of the side magnetic portion 23, and form two magnetic gaps 24, thereby making full use of the magnetic fields of the central magnetic portion 22 and improving the magnetic energy utilization rate of the central magnetic portion 22, so as to promote the magnetic energy and sensitivity of the sounding device 100, and thus improving the product performance. Meanwhile, the vibrating diaphragm 31 is arranged to be an annular vibrating diaphragm, and in the vibrating direction along the vibrating system, the two side surfaces of the vibrating diaphragm do not exceed the two side surfaces of the magnetic circuit system, so that the vibrating system and the magnetic circuit system are changed from the traditional vertical arrangement to the horizontal arrangement, the thickness (height) of the sounding device is reduced, and the thinning development of the sounding device is facilitated.

In one embodiment, the diaphragm 31 has two major axis sides and two minor axis sides connected end to end, and the two center magnetic groups 221 are arranged at intervals along the direction of the major axis sides.

In this embodiment, as shown in fig. 2, the diaphragm 31 is optionally arranged in a rectangular shape, i.e. the diaphragm 31 has two major axis sides and two minor axis sides connected end to end. Alternatively, the two central magnetic groups 221 of the central magnetic portion 22 are arranged at intervals along the direction of the long axis side, that is, the two magnetic gaps 24 of the magnetic circuit system 2 are arranged at intervals along the direction of the long axis side, so that the two voice coils 32 are arranged at intervals along the direction of the long axis side.

In one embodiment, as shown in fig. 2 and 4, the outer magnetic groups 231 of the side magnetic part 23 include a plurality of outer magnetic groups 231 surrounding the outer sides of the two central magnetic groups 221 of the central magnetic part 22, and the adjacent outer magnetic groups 231 are spaced apart to form a gap.

It can be appreciated that each of the plurality of outer magnetic groups 231 includes a first side magnet 2321, a side magnetic plate 2322, and a second side magnet 2323 that are stacked, where a gap is formed between adjacent first side magnets 2321 in adjacent outer magnetic groups 231, a gap is formed between adjacent side magnetic plates 2322, and a gap is formed between adjacent second side magnets 2323, so that the plurality of outer magnetic groups 231 are spaced and surround to form an annular structure with a gap, which is not limited herein. Optionally, the gaps formed between adjacent outer magnetic groups 231 are gaps that avoid gaps 2311.

In the present embodiment, the first side magnet 2321 and the second side magnet 2323 of the outer magnet group 231 and the common magnet group 232 may be selected as permanent magnets. It may be appreciated that the first side magnet 2321, the side magnetic plate 2322, and the second side magnet 2323 of the outer magnetic group 231 and the common magnetic group 232 are stacked along the moving direction of the voice coil 32, that is, the first side magnet 2321 and/or the second side magnet 2323 are connected to the magnetic yoke 21, the side magnetic plate 2322 is stacked between the first side magnet 2321 and the second side magnet 2323, and the second side magnet 2323 is stacked on a side of the side magnetic plate 2322 facing away from the first side magnet 2321.

Alternatively, the first central magnet 2211, the central magnetic conductive plate 2212 and the second central magnet 2213 of the two central magnetic groups 221 are all in square plate structures, which is not limited herein. The first and second central magnets 2211 and 2213 may be permanent magnets. The first center magnet 2211, the center magnetic plate 2212, and the second center magnet 2213 of the two center magnetic groups 221 are stacked along the moving direction of the voice coil 32, which is not limited herein.

The sound generating device 100 of the invention sets the magnetic circuit 2 as the magnetic yoke 21 and the central magnetic part 22 and the side magnetic part 23 which are arranged on the magnetic yoke 21, sets the central magnetic part 22 as two central magnetic groups 221 which are arranged at intervals, sets the side magnetic part 23 as an outer magnetic group 231 which is positioned outside the two central magnetic groups 221 and a shared magnetic group 232 which is positioned between the two central magnetic groups 221, so that the outer magnetic group 231 and the shared magnetic group 232 of the side magnetic part 23 are spaced from each central magnetic group 221 to form two magnetic gaps 24 which are arranged at intervals in a surrounding way, and sets the two voice coils 32 of the vibration system 3 corresponding to the two magnetic gaps 24 respectively, thus, current is introduced into the two voice coils 32, and the two voice coils 32 vibrate in the magnetic fields of the two magnetic gaps 24 formed by the magnetic circuit 2 and drive the vibrating diaphragm 31 to vibrate and sound; meanwhile, each central magnet group 221 is set to be a first central magnet 2211, a central magnetic conduction plate 2212 and a second central magnet 2213 which are arranged in a stacked manner, and each outer magnet group 231 and the common magnet group 232 are set to be a first side magnet 2321, a side magnetic conduction plate 2322 and a second side magnet 2323 which are arranged in a stacked manner, so that the first central magnet 2211, the central magnetic conduction plate 2212 and the second central magnet 2213 of the two central magnet groups 221 are respectively corresponding to the outer magnet group 231 of the side magnet part 23 and the first side magnet 2321, the side magnetic conduction plate 2322 and the second side magnet 2323 of the common magnet group 232 in a vibration direction perpendicular to the vibration system 3, and thus the two central magnet groups 221 of the central magnet part 22 commonly share the common magnet group 232 of the side magnet part 23, and form two magnetic gaps 24, thereby enabling the two voice coils 32 to fully utilize the magnetic field of the central magnet part 22, improving the magnetic energy utilization rate of the central magnet part 22, and improving the loudness and sensitivity of the sounding device 100, to improve product performance.

In an embodiment, the first central magnet 2211 and the second central magnet 2213 are magnetized along the vibration direction of the vibration system 3, the magnetic poles of the first central magnet 2211 and the second central magnet 2213 close to the central magnetic conductive plate 2212 are the same, the first side magnet 2321 and the second side magnet 2323 are magnetized along the vibration direction of the vibration system 3, the magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic conductive plate 2322 are the same, and the magnetic poles of the first central magnet 2211 and the second central magnet 2213 close to the central magnetic conductive plate 2212 are opposite to the magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic conductive plate 2322.

In the present embodiment, as shown in fig. 1 and 3, the vibration direction of the vibration system 3 may be selected to be a vertical direction. Alternatively, the first side magnet 2321 and the second side magnet 2323 of the outer magnet group 231 and the common magnet group 232 are magnetized in the vertical direction, and the first center magnet 2211 and the second center magnet 2213 of the two center magnet groups 221 are magnetized in the vertical direction.

It should be noted that, the arrow direction in the magnetic circuit system 2 shown in fig. 3 is the direction from the S pole to the N pole, that is, the magnetizing direction. The first and second center magnets 2211 and 2213 of the two center magnet groups 221 are magnetized in the vertical direction and opposite in direction, and the first and second side magnets 2321 and 2323 of the outer magnet group 231 and the common magnet group 232 are magnetized in the vertical direction and opposite in direction. It will be appreciated that such an arrangement may be such that the central magnetic portion 22 and the side magnetic portions 23 form a magnetic loop through the voice coil 32 within the magnetic gap 24.

It can be appreciated that the magnetizing direction of the first central magnet 2211 is opposite to the magnetizing direction of the second central magnet 2213, so that the magnetic induction lines of the first central magnet 2211 and the second central magnet 2213 of the central magnetic portion 22 are gathered on the central magnetic conductive plate 2212, and the magnetic field with stronger magnetic field strength generated by the central magnetic portion 22 passes through the magnetic gap 24, so that the density of the magnetic flux of the magnetic gap 24 is increased, the number of magnetic lines of force passing through the voice coil 32 is increased, the magnetic field force applied to the voice coil 32 is increased, and the BL value is effectively increased. Meanwhile, the magnetizing direction of the first side magnet 2321 is opposite to the magnetizing direction of the second side magnet 2323, so that the magnetic induction lines of the first side magnet 2321 and the second side magnet 2323 of the side magnetic part 23 are gathered on the side magnetic conduction plate 2322, and the magnetic field with stronger magnetic field strength is generated by the side magnetic part 23 to pass through the magnetic gap 24, so that the density of the magnetic flux of the magnetic gap 24 is increased, the number of magnetic force lines passing through the voice coil 32 is increased, the magnetic field force received by the voice coil 32 is increased, and the BL value is effectively improved.

In this embodiment, when the first central magnet 2211 is magnetized from top to bottom, the second central magnet 2213 is magnetized from bottom to top, the first side magnet 2321 is magnetized from bottom to top, and the second side magnet 2323 is magnetized from top to bottom, that is, the N pole of the first central magnet 2211 is on the bottom, the S pole is on the top, the N pole of the second central magnet 2213 is on the bottom, the N pole of the first side magnet 2321 is on the top, the S pole is on the bottom, the N pole of the second side magnet 2323 is on the bottom, and the S pole is on the top, or vice versa.

It is understood that the magnetic poles of the first central magnet 2211 and the second central magnet 2213 near the central magnetic conductive plate 2212 are the same, that is, the magnetic poles of the first central magnet 2211 and the second central magnet 2213 near the central magnetic conductive plate 2212 are both N-poles or S-poles. The magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic plate 2322 are the same, that is, the magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic plate 2322 are both S poles or N poles. In this embodiment, when the magnetic poles of the first central magnet 2211 and the second central magnet 2213 close to the central magnetic conductive plate 2212 are both N poles, the magnetic poles of the first side magnet 2321 and the second side magnet 2323 close to the side magnetic conductive plate 2322 are both S poles, and vice versa, so that the central magnetic portion 22 and the side magnetic portion 23 form a magnetic circuit passing through the voice coil 32 in the magnetic gap 24, which is not limited herein.

In an embodiment, the first center magnets 2211 include a plurality of first center magnets 2211 disposed adjacent to each other and between the central magnetic conductive plate 2212 and the magnetic conductive yoke 21, wherein the plurality of first center magnets 2211 are magnetized along the vibration direction of the vibration system 3, and the magnetizing directions of the plurality of first center magnets 2211 are the same.

Optionally, a plurality of first central magnets 2211 are tiled between the magnetic yoke 21 and the central magnetic plate 2212. The plurality of first center magnets 2211 are magnetized in the vertical direction, and the magnetizing directions of the plurality of first center magnets 2211 are the same. That is, the plurality of first center magnets 2211 are magnetized along the moving direction of the voice coil 32, and the plurality of first center magnets 2211 are magnetized upward or downward at the same time, which is not limited herein.

In an embodiment, the second center magnets 2213 include a plurality of second center magnets 2213 disposed adjacent to each other and located on a side of the central magnetic conductive plate 2212 facing away from the first center magnets 2211, wherein the plurality of second center magnets 2213 are magnetized along a vibration direction of the vibration system 3, and the magnetizing directions of the plurality of second center magnets 2213 are the same.

Optionally, the plurality of second central magnets 2213 are tiled on a side of the central magnetic conductive plate 2212 facing away from the first central magnets 2211. The plurality of second center magnets 2213 are magnetized in the vertical direction, and the magnetizing directions of the plurality of second center magnets 2213 are the same. That is, the plurality of second center magnets 2213 are magnetized in the direction in which the voice coil 32 moves, and the plurality of second center magnets 2213 are magnetized upward or downward at the same time, which is not limited herein.

In an embodiment, the first side magnet 2321 includes a plurality of first side magnets 2321 disposed adjacent to each other and between the side magnetic plate 2322 and the magnetic yoke 21, where the plurality of first side magnets 2321 are magnetized along the vibration direction of the vibration system 3, and the magnetizing directions of the plurality of first side magnets 2321 are the same.

Optionally, a plurality of first side magnets 2321 are tiled between the magnetic yoke 21 and the side magnetic plate 2322. The plurality of first side magnets 2321 are magnetized in the vertical direction, and the magnetizing directions of the plurality of first side magnets 2321 are the same. That is, the plurality of first side magnets 2321 are magnetized in the direction in which the voice coil 32 moves, and the plurality of first side magnets 2321 are magnetized upward or downward simultaneously, which is not limited herein.

In an embodiment, the second side magnet 2323 includes a plurality of second side magnets 2323 disposed adjacent to each other and located on a side of the side magnetic plate 2322 facing away from the first side magnet 2321, where the plurality of second side magnets 2323 magnetize along a vibration direction of the vibration system 3, and magnetizing directions of the plurality of second side magnets 2323 are the same.

Optionally, the plurality of second side magnets 2323 are tiled on a side of the side magnetic plate 2322 facing away from the first side magnet 2321. The plurality of second side magnets 2323 are magnetized in the vertical direction, and the magnetizing directions of the plurality of second side magnets 2323 are the same. That is, the plurality of second side magnets 2323 are magnetized in the direction in which the voice coil 32 moves, and the plurality of second side magnets 2323 are magnetized upward or downward simultaneously, which is not limited herein.

In one embodiment, the projection of at least part of the side magnetic plate 2322 in the vibration direction perpendicular to the vibration system 3 coincides with the projection of the voice coil 32 in the vibration direction perpendicular to the vibration system 3. It can be appreciated that the arrangement is such that the magnetic induction lines of the first side magnet 2321 and the second side magnet 2323 of the side magnetic portion 23 are collected on the side magnetic plate 2322 and pass through the magnetic gap 24, so as to increase the density of the magnetic flux of the magnetic gap 24, and make the voice coil 32 in a more reasonable magnetic field, so as to alleviate the distortion condition of the audio output by the sound generating device 100, and improve the sound quality of the audio output by the sound generating device 100. Alternatively, the projection of the side magnetic plate 2322 in the horizontal direction is located in the projection of the voice coil 32 in the horizontal direction.

Alternatively, the thickness of the side magnetic plate 2322 is less than or equal to the thickness of the first side magnet 2321, and the thickness of the side magnetic plate 2322 is less than or equal to the thickness of the second side magnet 2323, which is not limited herein.

In one embodiment, at least a portion of the projection of the central magnetically permeable plate 2212 in a direction perpendicular to the vibration direction of the vibration system 3 coincides with the projection of the voice coil 32 in a direction perpendicular to the vibration direction of the vibration system 3. It can be appreciated that the arrangement is such that the magnetic induction lines of the first central magnet 2211 and the second central magnet 2213 of the central magnetic portion 22 are concentrated on the central magnetic conductive plate 2212 and pass through the magnetic gap 24, so as to increase the magnetic flux density of the magnetic gap 24, and the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion condition of the audio output by the sound generating device 100 and improve the sound quality of the audio output by the sound generating device 100. Optionally, the projection of the central magnetically permeable plate 2212 in the horizontal direction is located in the projection of the voice coil 32 in the horizontal direction.

Alternatively, the thickness of the central magnetic conductive plate 2212 is less than or equal to the thickness of the first central magnet 2211, and the thickness of the central magnetic conductive plate 2212 is less than or equal to the thickness of the second central magnet 2213, which is not limited herein. In this embodiment, the thickness of the central magnetic plate 2212 is optionally comparable to the thickness of the side magnetic plates 2322.

In the present embodiment, as shown in fig. 1 and 3, the thickness of the first center magnet 2211 in the vibration direction of the vibration system 3 is optionally the same as the thickness of the first side magnet 2321 in the vibration direction of the vibration system 3. Alternatively, the thickness of the second center magnet 2213 in the vibration direction of the vibration system 3 is the same as the thickness of the second side magnet 2323 in the vibration direction of the vibration system 3. Alternatively, the thickness of the central magnetic conductive plate 2212 in the vibration direction of the vibration system 3 is the same as the thickness of the side magnetic conductive plate 2322 in the vibration direction of the vibration system 3. By this arrangement, the force for driving the voice coil 32 can be ensured to be equivalent, and the smoothness of the vibration of the voice coil 32 can be improved.

In an embodiment, the sound generating device 100 further comprises a housing 1, the housing 1 is provided with a mounting cavity 11, and the magnetic circuit system 2 and the vibration system 3 are arranged in the mounting cavity 11.

In the present embodiment, as shown in fig. 1 and 2, the housing 1 includes a first housing 15 and a second housing 16, and the first housing 15 and the second housing 16 enclose a mounting chamber 11. It can be appreciated that the first housing 15 and/or the second housing 16 include a bottom plate and a side plate disposed at a periphery of the bottom plate, so that the side plate and the bottom plate enclose a receiving cavity with an opening at one end, and at this time, the first housing 15 and the second housing 16 are connected in a butt joint to cover the opening and enclose the mounting cavity 11.

It will be appreciated that the magnetic circuit 2 is disposed between the first housing 15 and the second housing 16, and the periphery of the diaphragm 31 of the vibration system 3 is connected to the first housing 15 and/or the second housing 16. Optionally, the first magnetic yoke 211 and the second magnetic yoke 212 of the magnetic yoke 21 of the magnetic circuit system 2 are respectively connected with the bottom plates of the first housing 15 and the second housing 16, at this time, a through hole structure through which the magnetic circuit system 2 passes is provided at the center of the diaphragm 31, the periphery of the diaphragm 31 is connected to the housing 1, and the center of the diaphragm 31 is connected to the magnetic circuit system 2 or the housing 1, which is not limited herein.

In an embodiment, the magnetic guide yoke 21 includes a first yoke 211 and a second yoke 212 that are disposed opposite to each other, the central magnetic portion 22 and the side magnetic portion 23 are disposed between the first yoke 211 and the second yoke 212, the first side magnet 2321 and the first central magnet 2211 are connected to the first yoke 211, and the second side magnet 2323 and the second central magnet 2213 are connected to the second yoke 212.

In the present embodiment, as shown in fig. 1 and 2, by disposing the magnetic guide yoke 21 as the first yoke 211 and the second yoke 212 which are disposed opposite to each other, an installation space is formed between the first yoke 211 and the second yoke 212, and at this time, the center magnetic portion 22 and the side magnetic portion 23 are disposed between the first yoke 211 and the second yoke 212, that is, the first center magnet 2211 of the center magnetic portion 22 and the first side magnet 2321 of the side magnetic portion 23 are connected to the first yoke 211, and the second center magnet 2213 of the center magnetic portion 22 and the second side magnet 2323 of the side magnetic portion 23 are connected to the second yoke 212.

It can be understood that the magnetic induction lines generated by the central magnetic portion 22 and the magnetic induction lines generated by the side magnetic portion 23 can effectively form a magnetic loop passing through the voice coil 32 in the magnetic gap 24, so that the density of the magnetic flux of the magnetic gap 24 is effectively increased, and the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion condition of the audio output by the sound generating device 100, and improve the tone quality of the audio output by the sound generating device 100.

In an embodiment, the housing 1 is further provided with a first through hole 12 and a second through hole 13 communicating with the mounting cavity 11, the first yoke 211 is connected to the housing 1 and located in the first through hole 12, and the second yoke 212 is connected to the housing 1 and located in the second through hole 13.

In the present embodiment, as shown in fig. 1 and 2, each of the first housing 15 and the second housing 16 includes a bottom plate and a side plate provided at the periphery of the bottom plate, the bottom plates of the first housing 15 and the second housing 16 are provided with the first through hole 12 and the second through hole 13 corresponding to the first yoke 211 and the second yoke 212 of the yoke 21, respectively, that is, the bottom plate of the first housing 15 is provided with the first through hole 12, and the bottom plate of the second housing 16 is provided with the second through hole 13.

It will be appreciated that the first yoke 211 of the yoke 21 is connected to the first body 15 of the housing 1 and is located in the first through hole 12, and the second yoke 212 of the yoke 21 is connected to the second body 16 of the housing 1 and is located in the second through hole 13. Alternatively, the periphery of the diaphragm 31 is sandwiched between the first housing 15 and the second housing 16.

In an embodiment, the diaphragm 31 has an inner ring hole 312, the magnetic circuit 2 is disposed through the inner ring hole 312, the magnetic circuit 2 is provided with an avoidance gap 2311 communicating with each magnetic gap 24, the vibration system 3 further includes a frame 33, one end of the frame 33 is connected with the diaphragm 31, and the other end of the frame 33 passes through the avoidance gap 2311 to be connected with each voice coil 32.

It can be appreciated that by setting the diaphragm 31 as an annular diaphragm, the magnetic circuit system 2 is disposed through the inner annular ring 312, so that the overall thickness of the product can be reduced.

In this embodiment, as shown in fig. 1,2 and 5, by providing the frame 33, both the voice coils 32 are connected with the diaphragm 31 through the frame 33, so that the voice coils 32 can be ensured to be in a more reasonable magnetic field, that is, a region with the largest magnetic flux density, thereby effectively improving the BL value.

Optionally, the outer magnetic set 231 of the magnetic circuit system 2 is provided with an avoidance gap 2311, and the avoidance gap 2311 is communicated with the magnetic gap 24, so that the framework 33 passes through the avoidance gap 2311 to be connected with the voice coil 32.

In an embodiment, the frame 33 includes a first connecting portion 331, a connecting arm 332, and a second connecting portion 333, two ends of the connecting arm 332 are respectively connected to the first connecting portion 331 and the second connecting portion 333, the first connecting portion 331 is connected to the diaphragm 31, and the connecting arm 332 passes through the avoidance gap 2311 so that the second connecting portion 333 is connected to the voice coil 32.

It can be understood that when the skeleton 33 is one, the skeleton 33 includes a first connecting portion 331, a plurality of connecting arms 332, and a plurality of second connecting portions 333. Optionally, the first connecting portion 331 is disposed annularly and connected to the diaphragm 31, the plurality of connecting arms 332 and the plurality of second connecting portions 333 are all located inside the first connecting portion 331, one end of the plurality of connecting arms 332 is connected to the first connecting portion 331 and disposed at intervals, and at least one second connecting portion 333 is connected to one end of the connecting arm 332 away from the first connecting portion 331, wherein the at least one connecting arm 332 extends into a magnetic gap 24 through the avoidance gap 2311, so that the at least one second connecting portion 333 is connected to a voice coil 32.

Alternatively, the first connecting portion 331 is disposed in a rectangular ring shape, the connecting arms 332 include four connecting arms 332, and the four connecting arms 332 are disposed corresponding to four corners of the first connecting portion 331.

Of course, the skeleton 33 may also include a plurality, for example, the skeleton 33 includes two or four. In an embodiment, as shown in fig. 2 and 5, the two frames 33 are two, the diaphragm 31 has two long axis sides and two short axis sides connected end to end, the two central magnetic groups 221 are arranged at intervals along the direction of the long axis sides, the two frames 33 are arranged at intervals along the short axis sides and are symmetrically arranged, and each frame 33 is correspondingly connected with one end of the two voice coils 32.

Alternatively, the two skeletons 33 may be arranged at intervals along the major or minor axis of the diaphragm 31 and symmetrically disposed.

In an embodiment, when the two frames 33 are arranged at intervals along the short axis, and are symmetrically arranged, that is, the two frames 33 are respectively arranged corresponding to the two long axis sides of the diaphragm 31, at this time, each frame 33 is correspondingly connected with one end of the two voice coils 32.

In this embodiment, the frame 33 includes a first connecting portion 331, a plurality of connecting arms 332 and a plurality of second connecting portions 333, wherein the first connecting portion 331 is connected to the diaphragm 31, the plurality of connecting arms 332 and the plurality of second connecting portions 333 are all located inside the first connecting portion 331, one ends of the plurality of connecting arms 332 are all connected to the first connecting portion 331 and are disposed at intervals, and at least one second connecting portion 333 is connected to one end of the connecting arm 332 away from the first connecting portion 331, wherein the plurality of connecting arms 332 penetrate through the avoidance gaps 2311 and extend into the magnetic gap 24 so that the second connecting portions 333 are connected to the voice coil 32.

It can be understood that the plurality of connection arms 332 of one frame 33 respectively penetrate the plurality of avoidance notches 2311 to extend into the two magnetic gaps 24 and are respectively connected with one ends of the two voice coils 32 through the second connection parts 333, and the plurality of connection arms 332 of the other frame 33 respectively penetrate the plurality of avoidance notches 2311 to extend into the two magnetic gaps 24 and are respectively connected with the other ends of the two voice coils 32 through the second connection parts 333.

In another embodiment, when two frames 33 are arranged at intervals along the long axis and symmetrically arranged, that is, two frames 33 are respectively arranged corresponding to two short axis sides of the diaphragm 31, and each frame 33 is correspondingly connected with a voice coil 32.

It can be understood that the plurality of connection arms 332 of one frame 33 respectively penetrate the plurality of avoidance notches 2311 to extend into one magnetic gap 24 and are respectively connected with two ends of one voice coil 32 through the second connection parts 333, and the plurality of connection arms 332 of the other frame 33 respectively penetrate the plurality of avoidance notches 2311 to extend into the other magnetic gap 24 and are respectively connected with two ends of one voice coil 32 through the second connection parts 333.

In this embodiment, a frame 33 may be connected to a voice coil 32. Of course, one bobbin 33 may be connected to the same side of the two voice coils 32.

Alternatively, the skeleton 33 includes four, and the four skeletons 33 are disposed corresponding to the four corner positions of the outer magnet group 231, respectively. Alternatively, the number of the bobbins 33 may be eight, and each bobbin 33 may be disposed corresponding to a corner position of one voice coil 32, which is not limited herein.

In an embodiment, the arrangement direction of the two central magnetic groups 221 is defined as a first direction, the outer magnetic group 231 includes a first portion disposed along the first direction on both sides of the two central magnetic groups 221 and a second portion disposed along a direction perpendicular to the first direction on both sides of the two central magnetic groups 221, and avoidance gaps 2311 are formed between the first portion and the second portion and between the second portion and the common magnetic group 232.

In this embodiment, as shown in fig. 2 and 4, the outer magnetic group 231 of the side magnetic part 23 is optionally arranged in a rectangular frame, the outer magnetic group 231 has two long sides and two short sides, the two center magnetic groups 221 are arranged at intervals along the direction of the long sides, the first part of the outer magnetic group 231 is two short sides, the second part of the outer magnetic group 231 is two long sides, the common magnetic group 232 is located between the two short sides and parallel to the short sides and perpendicular to the long sides, so that the outer magnetic group 231 is divided into two rectangular cavities by the common magnetic group 232.

Optionally, each corner position of the outer magnetic set 231 is provided with an avoidance gap 2311, that is, an avoidance gap 2311 is provided between the long side and the short side. Of course, the connection between the long side of the outer magnetic set 231 and the common magnetic set 232 may also be provided with a avoiding notch 2311. Optionally, the number of the connecting arms 332 of the skeleton 33 is identical to the number of the avoidance notches 2311, and the connection arms are disposed in a one-to-one correspondence, which is not limited herein.

It will be appreciated that the leads of the two voice coils 32 may also be guided to the housing 1 by the bobbin 33 and connected to an external circuit. The bobbin 33 not only plays a role in connecting and fixing the voice coil 32, but also plays a role in avoiding the problem of oscillation or polarization of the voice coil 32 during vibration.

In an embodiment, the diaphragm 31 includes an inner ring portion 311, a first ring portion 313 disposed around the inner ring portion 311, a flat portion 314 disposed around the first ring portion 313, a second ring portion 315 disposed around the flat portion 314, and a fixing portion 316 connected to an outer side of the second ring portion 315, the flat portion 314 is connected to the frame 33, and the inner ring portion 311 is formed with an inner ring hole 312.

In this embodiment, as shown in fig. 1 and 2, the inner ring portion 311, the first ring portion 313, the flat portion 314, the second ring portion 315 and the fixing portion 316 of the diaphragm 31 may be selected as an integrally formed structure, so as to ensure the vibration performance and structural strength of the diaphragm 31. Optionally, the magnetic circuit system 2 is disposed through the inner ring hole 312.

It will be appreciated that the first and second refraction rings 313 and 315 of the diaphragm 31 have a convex hull structure that is convex upward or a concave structure that is concave downward, which are not limited herein. Alternatively, the protruding direction of the first folding ring 313 is the same as or opposite to the protruding direction of the second folding ring 315. In the present embodiment, the first and second folding rings 313 and 315 may be simultaneously protruded upward or simultaneously protruded downward. Of course, in other embodiments, the first and second folding rings 313 and 315 may also be raised upward and downward, respectively, without limitation.

In an embodiment, as shown in fig. 1 and 2, the diaphragm 31 further includes a reinforcing portion 317, and the reinforcing portion 317 is disposed between the straight portion 314 and the frame 33. It can be appreciated that by providing the reinforcing portion 317, the structural strength of the diaphragm 31 can be effectively enhanced, so as to improve the connection stability of the voice coil 32, and avoid the problem of tearing the diaphragm 31 when the voice coil 32 drives the diaphragm 31 to vibrate.

In an embodiment, the sound generating device 100 is further provided with a support member 14, the support member 14 has a ring structure, the support member 14 surrounds the magnetic circuit system 2 and is connected with the housing 1, the outer ring of the diaphragm 31 is fixed on the housing 1, and the inner ring of the diaphragm 31 is connected with the support member 14.

In the present embodiment, as shown in fig. 1 and 2, by providing the support 14, it is convenient to fix the center portion of the diaphragm 31, that is, the inner ring portion 311 of the diaphragm 31, to the support 14 by the support 14. It will be appreciated that the support 14 is provided protruding from the floor of the first housing 15 and/or the second housing 16.

Optionally, the support 14 is arranged in a ring shape, the support 14 surrounding the magnetic circuit system 2. By providing the support member 14 such that the outer ring of the diaphragm 31 is fixed to the housing 1 and the inner ring is connected to the support member 14, the fixation of the diaphragm 31 can be achieved, and the support and fixation of the bobbin 33 and the two voice coils 32 can be achieved.

In this embodiment, the diaphragm 31 divides the installation cavity on the periphery of the magnetic circuit 2 into a front cavity and a rear cavity, that is, the front cavity is formed between the side of the diaphragm 31 away from the frame 33 and the housing 1, that is, the front cavity is formed between the diaphragm 31 and the first housing 15, and the rear cavity is formed between the side of the diaphragm 31 facing the frame 33 and the housing 1, that is, the rear cavity is formed between the diaphragm 31 and the second housing 16. It will be appreciated that, in order to facilitate the sound production of the sound production device 100, the housing 1 is provided with a sound production hole communicating with the front cavity. By providing the support 14, it is effectively ensured that the diaphragm 31 separates the front and rear chambers. In order to equalize the air pressure on both sides of the diaphragm 31, the rear cavity is in communication with the magnetic gap, and optionally, the housing 1 or the magnetic circuit system 2 is provided with an air release hole for communicating the rear cavity with the magnetic gap, which is not limited herein.

The invention also provides electronic equipment, which comprises the sounding device 100. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and because the electronic device adopts all the technical solutions of all the foregoing embodiments, the sound generating device at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described in detail herein.

In an embodiment, the electronic device further includes a device housing, the device housing has a mounting space, and the sound generating apparatus 100 is disposed in the mounting space of the device housing.

In this embodiment, the electronic apparatus further includes a flexible circuit board, one end of which is electrically connected to the sound generating device 100, and the other end of which is used for connecting to an external power source. It will be appreciated that the flexible circuit board is used to connect and conduct an external circuit to the two voice coils 32 of the sound emitting device 100. The flexible circuit board is provided with an inner bonding pad and an outer bonding pad, the inner bonding pad of the flexible circuit board is connected and conducted with the sound generating device 100, and the outer bonding pad of the flexible circuit board is used for being connected with an external terminal.

In this embodiment, the device housing has an installation space, the sound generating device 100 is disposed in the installation space of the device housing, and at least one end of the flexible circuit board connected with the sound generating device 100 is disposed in the installation space of the device housing. Of course, in other embodiments, the flexible circuit board may be disposed entirely in the installation space of the device housing, which is not limited herein.

It is understood that the electronic device may be an earphone, a mobile phone, an MP3, an MP4, a computer, a tablet computer, a smart wearable device, etc., which is not limited herein. In the electronic device, the sound generating apparatus 100 may be assembled into a housing of the electronic device in a module manner, or may be assembled into a housing of the electronic device in a single body.

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 (13)

1. A sound emitting device, the sound emitting device comprising:

The magnetic circuit system comprises a magnetic guide yoke, a central magnetic part and a side magnetic part, wherein the central magnetic part and the side magnetic part are arranged on the magnetic guide yoke, the central magnetic part comprises two central magnetic groups arranged at intervals, the side magnetic part comprises an outer magnetic group positioned at the outer sides of the two central magnetic groups and a shared magnetic group positioned between the two central magnetic groups, the outer magnetic group and the shared magnetic group are spaced from each central magnetic group to form two magnetic gaps arranged at intervals in a surrounding manner, each central magnetic group comprises a first central magnet, a central magnetic guide plate and a second central magnet which are arranged in a laminated manner, the outer magnetic group and the shared magnetic group comprise a first side magnet, a side magnetic guide plate and a second side magnet which are arranged in a laminated manner, and

The vibration system comprises a vibrating diaphragm and two voice coils connected with the vibrating diaphragm, the vibrating diaphragm is provided with an inner annular hole, the vibrating diaphragm is wound on the outer side of the magnetic circuit system, in the vibration direction along the vibration system, the two side surfaces of the vibrating diaphragm do not exceed the two side surfaces of the magnetic circuit system, and each voice coil is correspondingly arranged with one magnetic gap;

The first center magnet, the center magnetic conduction plate and the second center magnet are respectively in one-to-one correspondence with the first side magnet, the side magnetic conduction plate and the second side magnet in the vibration direction perpendicular to the vibration system.

2. The sound generating apparatus of claim 1, wherein the first center magnet and the second center magnet are both magnetized in a vibration direction of the vibration system, and magnetic poles of the first center magnet and the second center magnet near the center magnetically permeable plate are the same;

the first side magnet and the second side magnet are magnetized along the vibration direction of the vibration system, and the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conduction plate are the same;

The magnetic poles of the first center magnet and the second center magnet close to the center magnetic conduction plate are opposite to the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conduction plate.

3. The sound generating apparatus according to claim 1, wherein the magnetic circuit system is provided with an avoidance gap communicating with each of the magnetic gaps, the vibration system further comprises a skeleton, one end of the skeleton is connected with the diaphragm, and the other end of the skeleton passes through the avoidance gap and is connected with each of the voice coils.

4. The sound generating apparatus according to claim 3, wherein the number of the frames is two, the diaphragm has two long-axis sides and two short-axis sides connected end to end, the two central magnetic groups are arranged at intervals along the direction of the long-axis sides, the two frames are arranged at intervals along the short-axis sides and are symmetrically arranged, and each frame is correspondingly connected with one end of each of the two voice coils.

5. The sound generating apparatus of claim 4, wherein the skeleton comprises a first connecting portion, a plurality of connecting arms and a plurality of second connecting portions, the first connecting portion is connected with the diaphragm, the plurality of connecting arms and the plurality of second connecting portions are all located at the inner side of the first connecting portion, one ends of the plurality of connecting arms are connected with the first connecting portion and are arranged at intervals, and at least one of the second connecting portions is connected to one end of the connecting arm far away from the first connecting portion;

The connecting arms penetrate through the avoidance gaps and extend into the magnetic gaps, so that the second connecting portions are connected with the voice coils.

6. The sound generating apparatus of claim 3, wherein the diaphragm comprises an inner ring portion, a first ring around the inner ring portion, a flat portion around the first ring, a second ring around the flat portion, and a fixing portion connected to an outer side of the second ring, the flat portion is connected to the frame, and the inner ring portion is formed with the inner ring hole.

7. The sound generating apparatus of claim 6, wherein the inner ring portion, the first ring, the straight portion, the second ring, and the fixing portion are integrally formed;

And/or the protruding direction of the first folding ring is the same as or opposite to the protruding direction of the second folding ring;

And/or, the vibrating diaphragm further comprises a reinforcing part, and the reinforcing part is arranged between the straight part and the framework.

8. The sound generating apparatus according to claim 3, wherein an arrangement direction of the two central magnetic groups is defined as a first direction, the outer magnetic groups include first portions provided on both sides of the two central magnetic groups in the first direction and second portions provided on both sides of the two central magnetic groups in a direction perpendicular to the first direction, and the avoidance gaps are formed between the first portions and the second portions and between the second portions and the common magnetic groups.

9. The sound emitting device of any one of claims 1-7, further comprising a housing, the housing having a mounting cavity, the magnetic circuit system and the vibration system being disposed within the mounting cavity.

10. The sound generating apparatus of claim 9, wherein the magnetically permeable yoke comprises a first yoke and a second yoke disposed opposite each other, the central magnetic portion and the side magnetic portion are disposed between the first yoke and the second yoke, the first side magnet and the first central magnet are connected to the first yoke, and the second side magnet and the second central magnet are connected to the second yoke.

11. The sound emitting device of claim 10, wherein the housing is further provided with a first through hole and a second through hole communicating with the mounting cavity, the first yoke is connected to the housing and located in the first through hole, and the second yoke is connected to the housing and located in the second through hole.

12. The sound generating apparatus of claim 9, further comprising a support member having a ring-shaped structure, the support member surrounding the magnetic circuit and being connected to the housing or the magnetic circuit, an outer ring of the diaphragm being connected to the housing, an inner ring of the diaphragm being connected to the support member;

and/or, be equipped with the sound hole on the shell, the vibrating diaphragm will the installation cavity of magnetic circuit week side is divided into front chamber and rear chamber, the front chamber with sound hole intercommunication, the rear chamber with the magnetic gap intercommunication.

13. An electronic device comprising the sound emitting apparatus according to any one of claims 1 to 12.