CN119277280A - Sound generating devices and electronic equipment - Google Patents

Sound generating devices and electronic equipment Download PDF

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Publication number
CN119277280A
CN119277280A CN202411388051.6A CN202411388051A CN119277280A CN 119277280 A CN119277280 A CN 119277280A CN 202411388051 A CN202411388051 A CN 202411388051A CN 119277280 A CN119277280 A CN 119277280A
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CN
China
Prior art keywords
magnetic
central
magnet
sound
diaphragm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202411388051.6A
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Chinese (zh)
Inventor
刘迎新
孙立国
王建建
郭翔
杨子坤
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Goertek Inc
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Goertek Inc
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Priority to CN202411388051.6A priority Critical patent/CN119277280A/en
Publication of CN119277280A publication Critical patent/CN119277280A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本发明公开一种发声装置和电子设备，涉及电声换能技术领域，该发声装置包括磁路系统和振动系统，磁路系统的中心磁部包括两个中心磁组，边磁部包括位于两个中心磁组的外侧的外磁组以及位于两个中心磁组之间的共用磁组，外磁组和共用磁组均与每一中心磁组间隔，以围合形成间隔设置的两个磁间隙，每一中心磁组包括层叠设置的第一中心磁铁、中心导磁板及第二中心磁铁，外磁组和共用磁组均包括层叠设置的第一边磁铁、边导磁板及第二边磁铁，振动系统包括振膜和两个音圈，每一音圈与一磁间隙对应设置。本发明的发声装置通过优化磁路系统，并采用双音圈进一步提升磁路系统的利用率，从而提升发声装置的响度和灵敏度。

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, and each voice coil is arranged corresponding to 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 vibrating diaphragm is provided with two long axis sides and two short axis sides which are connected end to end, and the two central magnetic groups are arranged at intervals along the direction of the long axis sides.
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 vibrating diaphragm is provided with an inner annular hole, the magnetic circuit system penetrates through the inner annular hole, the magnetic circuit system is provided with avoidance notches communicated with each magnetic gap, the vibrating 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 notches to be connected with each voice coil.
In one embodiment, the two frames are arranged at intervals along the short axis edges and are symmetrically arranged, and each frame 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, a straight portion, a second ring and a fixing portion, the first ring is arranged around the inner ring portion, the straight portion is arranged around the first ring, the second ring is arranged around the straight portion, the fixing portion is connected to the outer side of the second ring, the straight portion is connected with the framework, 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 housing is further provided with a supporting member, the supporting member is in an annular structure, the supporting member surrounds the magnetic circuit system and is arranged on one side of the vibrating diaphragm, which is far away from the framework, and the inner ring of the vibrating diaphragm is connected with the supporting member;
And/or defining the arrangement direction of the two central magnetic groups as a first direction, wherein the outer magnetic group comprises a first part arranged on two sides of the two central magnetic groups along the first direction and a second part arranged on two sides of the two central magnetic groups along the direction perpendicular to the first direction, and avoidance gaps are formed between the first part and the second part and between the second part and the common magnetic groups.
The invention also proposes an electronic device, the electronic equipment comprises the sounding device.
According to the sound production device, the magnetic circuit system is arranged to be the magnetic guide yoke, the central magnetic part and the side magnetic part are arranged to be the two central magnetic groups arranged at intervals, the side magnetic part is arranged to be the outer magnetic group positioned on the outer side of the two central magnetic groups and the shared magnetic group positioned between the two central magnetic groups, the outer magnetic group and the shared magnetic group of the side magnetic part are spaced from each central magnetic group, two magnetic gaps arranged at intervals are formed by surrounding, the two voice coils of the vibration system are respectively arranged corresponding to the two magnetic gaps, and thus, currents are introduced into the two voice coils, the two voice coils vibrate in magnetic fields of the two magnetic gaps formed by the magnetic circuit system and drive the vibrating diaphragm to vibrate and produce sound, and meanwhile, the outer magnetic groups and the shared magnetic groups are respectively arranged to be the first central magnet, the central magnetic guide plate and the second central magnet which are arranged in a laminated mode, the first side magnetic guide plate and the second central magnet which are arranged in a laminated mode, the side magnetic guide plate and the second side magnetic guide plate are arranged in a laminated mode, the two voice coils are respectively arranged to be corresponding to the two magnetic gaps which are arranged, and the two magnetic fields of the two central magnetic cores can vibrate and the two magnetic cores are respectively arranged in a mode, and the magnetic field performance of the two magnetic field is fully improved, and the magnetic performance of the two magnetic cores can be the magnetic field is fully improved by the magnetic field of the two magnetic cores and the magnetic field is formed by the magnetic core side magnetic guide plate and the two magnetic core parts.
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 around each central magnetic group 221, 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 connected to the diaphragm 31, each voice coil 32 is disposed in correspondence with one magnetic gap 221, and the first magnetic conductive plate 2212 and the second magnetic conductive plate 2213 are disposed in a perpendicular direction to the first side 2323 and the second magnetic conductive plate 2213.
In the present embodiment, the sound generating apparatus 100 is a micro speaker. The magnetic circuit 2 of the sound generating device 100 and the diaphragm 31 of the vibration system 3 are disposed opposite to each other. Of course, in other embodiments, the diaphragm 31 of the vibration system 3 may also be disposed on the outer periphery of the magnetic circuit system 2, which is not limited herein.
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 periphery of the diaphragm 31 of the vibration system 3 is connected with the housing 1 and is opposite to and spaced from the magnetic circuit 2, or the periphery of the diaphragm 31 of the vibration system 3 is connected with the housing 1, the center of the diaphragm 31 is connected with the center magnetic portion 22 of the magnetic circuit 2 and is opposite to the magnetic circuit 2, or the 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 through which the magnetic circuit 2 passes, and at this time, the center of the diaphragm 31 is connected with the side magnetic portion 23 of the magnetic circuit 2 or the supporting member 14 on the housing 1, 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 center magnetic portion 22 as two center magnetic groups 221 arranged at intervals, and arranging the side magnetic portion 23 as an outer magnetic group 231 located outside the two center magnetic groups 221 and as a common magnetic group 232 located between the two center 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 center magnetic groups 221, and the outer magnetic group 231 and the common magnetic group 232 of the side magnetic portion 23 are spaced apart from each center 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 center magnetic group 221, so that the diaphragm 31 of the vibration system 3 is connected with the housing 1, so that one ends of the two diaphragms 32 are connected with the diaphragm 31, and the other ends of the two diaphragms 32 are respectively arranged corresponding to the two magnetic gaps 24 of the voice coil 32.
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.
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 one 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, and 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 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 straight portion 314 disposed around the first ring portion 313, a second ring portion 315 disposed around the straight portion 314, and a fixing portion 316 connected to an outer side of the second ring portion 315, the fixing portion 316 is connected to the housing 1, the straight 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 housing 1 is further provided with a support member 14, the support member 14 is in a ring structure, the support member 14 surrounds the magnetic circuit system 2 and is disposed on a side of the diaphragm 31 away from the frame 33, and an inner ring of the diaphragm 31 is connected to 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. The support 14 is adjacent to the magnetic circuit 2.
Optionally, the support 14 is arranged in a ring shape, the support 14 surrounding the magnetic circuit system 2. By arranging the support member 14 on the side of the diaphragm 31 away from the frame 33, the inner ring portion 311 is connected to the support member 14, so that the diaphragm 31 can be fixed, and the frame 33 and the two voice coils 32 can be supported and fixed.
In this embodiment, a front cavity is formed by enclosing one side of the diaphragm 31 away from the skeleton 33 with the housing 1, that is, a front cavity is formed by enclosing the diaphragm 31 with the first housing 15, and a rear cavity is formed by enclosing one side of the diaphragm 31 facing the skeleton 33 with the housing 1, that is, a rear cavity is formed by enclosing the diaphragm 31 with 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 ensure the air pressure balance between the front and rear chambers, the housing 1 is provided with an air release hole communicating with the rear chamber, 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)

1.一种发声装置，其特征在于，所述发声装置包括：1. A sound-generating device, characterized in that the sound-generating device comprises: 磁路系统，所述磁路系统包括导磁轭以及设于所述导磁轭的中心磁部和边磁部，所述中心磁部包括间隔设置的两个中心磁组，所述边磁部包括位于两个所述中心磁组的外侧的外磁组以及位于两个所述中心磁组之间的共用磁组，所述外磁组和所述共用磁组均与每一所述中心磁组间隔，以围合形成间隔设置的两个磁间隙，每一所述中心磁组包括层叠设置的第一中心磁铁、中心导磁板及第二中心磁铁，所述外磁组和所述共用磁组均包括层叠设置的第一边磁铁、边导磁板及第二边磁铁；和A magnetic circuit system, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the central magnetic portion includes two central magnetic groups arranged at intervals, the side magnetic portion 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 of the central magnetic groups to enclose and form two magnetic gaps arranged at intervals, each of the central magnetic groups 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; and 振动系统，所述振动系统包括振膜和连接于所述振膜的两个音圈，每一所述音圈与一所述磁间隙对应设置；A vibration system, the vibration system comprising a diaphragm and two voice coils connected to the diaphragm, each of the voice coils being arranged corresponding to one of the magnetic gaps; 其中，所述第一中心磁铁、所述中心导磁板及所述第二中心磁铁分别与所述第一边磁铁、所述边导磁板及所述第二边磁铁在垂直于所述振动系统的振动方向一一对应。The first central magnet, the central magnetic conductive plate and the second central magnet respectively correspond to the first side magnet, the side magnetic conductive plate and the second side magnet in a one-to-one manner in a vibration direction perpendicular to the vibration system. 2.如权利要求1所述的发声装置，其特征在于，所述第一中心磁铁和所述第二中心磁铁均沿所述振动系统的振动方向充磁，且所述第一中心磁铁和所述第二中心磁铁靠近所述中心导磁板的磁极相同；2. The sound-generating device according to claim 1, characterized in that the first central magnet and the second central magnet are magnetized along the vibration direction of the vibration system, and the magnetic poles of the first central magnet and the second central magnet close to the central magnetic conductive plate are the same; 所述第一边磁铁和所述第二边磁铁均沿所述振动系统的振动方向充磁，且所述第一边磁铁和所述第二边磁铁靠近所述边导磁板的磁极相同；The first side magnet and the second side magnet are both 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 conductive plate are the same; 所述第一中心磁铁和所述第二中心磁铁靠近所述中心导磁板的磁极与所述第一边磁铁和所述第二边磁铁靠近所述边导磁板的磁极相反。The magnetic poles of the first center magnet and the second center magnet close to the center magnetic conductive plate are opposite to the magnetic poles of the first side magnet and the second side magnet close to the side magnetic conductive plate. 3.如权利要求1所述的发声装置，其特征在于，所述振膜具有首尾连接的两个长轴边和两个短轴边，两个所述中心磁组沿所述长轴边的方向间隔排布。3. The sound-generating device according to claim 1 is characterized in that the diaphragm has two long axis sides and two short axis sides connected end to end, and the two central magnetic groups are arranged at intervals along the direction of the long axis sides. 4.如权利要求1至3中任一项所述的发声装置，其特征在于，所述发声装置还包括外壳，所述外壳设有安装腔，所述磁路系统和所述振动系统设于所述安装腔内。4. The sound-generating device according to any one of claims 1 to 3, characterized in that the sound-generating device further comprises a housing, the housing is provided with an installation cavity, and the magnetic circuit system and the vibration system are arranged in the installation cavity. 5.如权利要求4所述的发声装置，其特征在于，所述导磁轭包括相对设置的第一磁轭和第二磁轭，所述中心磁部和所述边磁部均设于所述第一磁轭和所述第二磁轭之间，所述第一边磁铁和所述第一中心磁铁均与所述第一磁轭连接，所述第二边磁铁和所述第二中心磁铁与所述第二磁轭连接。5. The sound-generating device as described in claim 4 is characterized in that the magnetically conductive yoke includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other, the central magnetic portion and the side magnetic portion are both arranged between the first magnetic yoke and the second magnetic yoke, the first side magnet and the first central magnet are both connected to the first magnetic yoke, and the second side magnet and the second central magnet are connected to the second magnetic yoke. 6.如权利要求5所述的发声装置，其特征在于，所述外壳还设有连通所述安装腔的第一贯通孔和第二贯通孔，所述第一磁轭连接于所述外壳，并位于所述第一贯通孔内，所述第二磁轭连接于所述外壳，并位于所述第二贯通孔内。6. The sound-generating device as described in claim 5 is characterized in that the shell is also provided with a first through hole and a second through hole connected to the installation cavity, the first magnetic yoke is connected to the shell and is located in the first through hole, and the second magnetic yoke is connected to the shell and is located in the second through hole. 7.如权利要求4所述的发声装置，其特征在于，所述振膜具有内环孔，所述磁路系统穿设于所述内环孔，所述磁路系统设有连通每一所述磁间隙的避让缺口，所述振动系统还包括骨架，所述骨架的一端与所述振膜连接，所述骨架的另一端穿过所述避让缺口与每一所述音圈连接。7. The sound-generating device as described in claim 4 is characterized in that the diaphragm has an inner ring hole, the magnetic circuit system is passed through the inner ring hole, the magnetic circuit system is provided with an avoidance gap connected to each of the magnetic gaps, and the vibration system also includes a skeleton, one end of the skeleton is connected to the diaphragm, and the other end of the skeleton passes through the avoidance gap and is connected to each of the voice coils. 8.如权利要求7所述的发声装置，其特征在于，所述骨架为两个，所述振膜具有首尾连接的两个长轴边和两个短轴边；两个所述骨架沿所述短轴边间隔排布，并呈对称设置，每一所述骨架与两个所述音圈的一端对应连接。8. The sound-generating device as described in claim 7 is characterized in that there are two skeletons, and the diaphragm has two long axis sides and two short axis sides connected end to end; the two skeletons are arranged at intervals along the short axis sides and are symmetrically arranged, and each of the skeletons is correspondingly connected to one end of the two voice coils. 9.如权利要求8所述的发声装置，其特征在于，所述骨架包括第一连接部、多个连接臂及多个第二连接部，所述第一连接部与所述振膜连接，多个所述连接臂及多个所述第二连接部均位于所述第一连接部的内侧，多个所述连接臂的一端均与所述第一连接部连接，并呈间隔设置，至少一所述第二连接部连接于所述连接臂远离所述第一连接部的一端；9. The sound-generating device according to claim 8, characterized in that 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 to the diaphragm, the plurality of connecting arms and the plurality of second connecting portions are all located on the inner side of the first connecting portion, one end of the plurality of connecting arms are all connected to the first connecting portion and are arranged at intervals, and at least one second connecting portion is connected to an end of the connecting arm away from the first connecting portion; 其中，多个所述连接臂穿过所述避让缺口伸入所述磁间隙内，以使所述第二连接部与所述音圈连接。Wherein, a plurality of the connecting arms pass through the avoidance gap and extend into the magnetic gap, so that the second connecting portion is connected to the voice coil. 10.如权利要求7所述的发声装置，其特征在于，所述振膜包括内环部、环绕所述内环部设置的第一折环、环绕所述第一折环设置的平直部、环绕所述平直部设置的第二折环以及连接于所述第二折环外侧的固定部，所述固定部连接于所述外壳，所述平直部与所述骨架连接，所述内环部形成有所述内环孔。10. The sound-emitting device as described in claim 7 is characterized in that the diaphragm includes an inner ring portion, a first folded ring arranged around the inner ring portion, a straight portion arranged around the first folded ring, a second folded ring arranged around the straight portion, and a fixed portion connected to the outer side of the second folded ring, the fixed portion is connected to the outer shell, the straight portion is connected to the frame, and the inner ring portion is formed with the inner ring hole. 11.如权利要求10所述的发声装置，其特征在于，所述内环部、所述第一折环、所述平直部、所述第二折环及所述固定部为一体成型结构；11. The sound-generating device according to claim 10, wherein the inner ring portion, the first folded ring, the straight portion, the second folded ring and the fixing portion are an integrally formed structure; 且/或，所述第一折环的凸起方向与所述第二折环的凸起方向相同或相反；And/or, the protruding direction of the first fold ring is the same as or opposite to the protruding direction of the second fold ring; 且/或，所述振膜还包括补强部，所述补强部设于所述平直部和所述骨架之间。And/or, the diaphragm further includes a reinforcement portion, and the reinforcement portion is arranged between the straight portion and the frame. 12.如权利要求7所述的发声装置，其特征在于，所述外壳还设有支撑件，所述支撑件为环形结构，所述支撑件环绕所述磁路系统且设于所述振膜远离所述骨架的一侧，所述振膜的内圈连接于所述支撑件；12. The sound-generating device according to claim 7, characterized in that the housing is further provided with a support member, the support member is an annular structure, the support member surrounds the magnetic circuit system and is provided on a side of the diaphragm away from the frame, and the inner ring of the diaphragm is connected to the support member; 且/或，定义两个所述中心磁组的排布方向为第一方向，所述外磁组包括沿所述第一方向设于两个所述中心磁组两侧的第一部分以及沿垂直于所述第一方向的方向设于两个所述中心磁组两侧的第二部分，所述第一部分和所述第二部分之间以及所述第二部分和所述共用磁组之间形成所述避让缺口。And/or, the arrangement direction of the two central magnetic groups is defined as a first direction, the outer magnetic group includes a first part arranged on both sides of the two central magnetic groups along the first direction and a second part arranged on both sides of the two central magnetic groups along a direction perpendicular to the first direction, and the avoidance gap is formed between the first part and the second part and between the second part and the common magnetic group. 13.一种电子设备，其特征在于，所述电子设备包括如权利要求1至12中任一项所述的发声装置。13. An electronic device, characterized in that the electronic device comprises the sound-generating device according to any one of claims 1 to 12.
CN202411388051.6A 2024-09-30 2024-09-30 Sound generating devices and electronic equipment Pending CN119277280A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120568260A (en) * 2025-07-31 2025-08-29 歌尔股份有限公司 Sound producing device and electronic equipment
CN120730229A (en) * 2025-08-26 2025-09-30 歌尔股份有限公司 Sound-generating devices and electronic equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120568260A (en) * 2025-07-31 2025-08-29 歌尔股份有限公司 Sound producing device and electronic equipment
CN120730229A (en) * 2025-08-26 2025-09-30 歌尔股份有限公司 Sound-generating devices and electronic equipment

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