CN114640929B

CN114640929B - Sound producing device and electronic equipment

Info

Publication number: CN114640929B
Application number: CN202210406198.8A
Authority: CN
Inventors: 张鹏; 韩志磊; 郑泽东
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2023-12-22
Anticipated expiration: 2042-04-18
Also published as: CN114640929A

Abstract

The invention discloses a sound generating device and electronic equipment, wherein the sound generating device comprises a shell, a vibration system and a magnetic circuit system, the shell is provided with an installation cavity, the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm is arranged in the installation cavity, the installation cavity is divided into a front sound cavity and a rear sound cavity by the vibrating diaphragm, the voice coil is arranged on one side of the vibrating diaphragm to drive the vibrating diaphragm to vibrate, and the magnetic circuit system is arranged in the installation cavity; the shell is provided with a plastic part, the plastic part is provided with a gas leakage hole communicated with the rear acoustic cavity, part of the plastic part and/or part of the magnetic circuit system is formed into a stop part, and the stop part is opposite to a part of the opening area of the gas leakage hole so as to adjust the gas leakage area of the gas leakage hole. The invention aims to provide the sound generating device which can effectively improve the tone quality and the high-pitch effect, so that the sound generating device can keep stable frequency response performance in a high-temperature and high-humidity environment.

Description

Sound producing device and electronic equipment

Technical Field

The present invention relates to electroacoustic conversion technology, and in particular, to a sound generating device and an electronic device using the sound generating device.

Background

The loudspeaker, also called loudspeaker, is widely used as an electroacoustic transducer in electronic devices such as sound boxes, headphones, mobile phones and the like. The current speakers can be classified into moving coil speakers, moving iron speakers, and planar diaphragm speakers in terms of operation principle. In the related art, in order to pursue higher sound quality, electronic devices such as headphones often use multiple driving units, i.e., tweeters and woofers. However, the size of the tweeter is smaller and smaller, the structural design of the existing product is limited by the external size, and the sound leakage holes meeting the use requirement of the tweeter cannot be normally formed. Therefore, the rear cavity of the tweeter cannot be deflated, and the frequency response performance can be reduced in a high-temperature and high-humidity environment, so that the tone quality of the electronic equipment is influenced, and the use effect of a user is influenced.

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 can effectively improve sound quality and improve high-pitch effect, so that the sound generating device can keep stable frequency response performance in a high-temperature and high-humidity environment.

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

A housing, the housing having a mounting cavity;

the vibration system comprises a vibrating diaphragm and a voice coil, wherein the vibrating diaphragm and the voice coil are arranged in the installation cavity, the vibrating diaphragm divides the installation cavity into a front sound cavity and a rear sound cavity, and the voice coil is arranged on one side of the vibrating diaphragm to drive the vibrating diaphragm to vibrate; and

The magnetic circuit system is arranged in the mounting cavity;

the shell is provided with a plastic part, the plastic part is provided with a gas leakage hole communicated with the rear acoustic cavity, part of the plastic part and/or part of the magnetic circuit system is formed into a stop part, and the stop part is opposite to a part of the opening area of the gas leakage hole so as to adjust the gas leakage area of the gas leakage hole.

In an embodiment, an air channel is formed between the magnetic circuit system and the inner wall of the shell at intervals, and the air flow of the rear acoustic cavity circulates to the air leakage hole through the air channel.

In an embodiment, the air leakage hole includes a first section and a second section, the first section is penetrating through the plastic part and corresponds to the air channel, and the second section is concavely disposed on a side of the plastic part facing the air channel and is correspondingly communicated with the first section, so that the plastic part corresponding to the first section forms the stop part.

In an embodiment, the housing includes a first shell, where the first shell includes a bottom and a side portion disposed at a periphery of the bottom, where the bottom and the side portion enclose to form a first mounting groove, at least a part of the bottom is formed by the plastic portion, and the air leakage hole is disposed at the bottom and is correspondingly communicated with the air channel;

the magnetic circuit system comprises a first magnetic circuit part arranged in the first mounting groove, wherein the first magnetic circuit part is connected with the bottom and is spaced from the side part to form the air channel.

In an embodiment, the first housing includes an integrally injection molded plastic part and a metal part, the metal part includes a bottom plate and a side plate connected to the bottom plate, the plastic part is disposed on a periphery of the bottom plate and connected to the side plate, the plastic part cooperates with the side plate to form the side portion, the plastic part is provided with a lug extending toward the bottom plate, so that the lug cooperates with the bottom plate to form the bottom, and the air leakage hole is opened in the lug.

In one embodiment, a part of the first magnetic circuit part covers a part of the air leakage hole, so that a part of the first magnetic circuit part opposite to the opening area of the air leakage hole forms the stop part.

In one embodiment, the housing includes a second shell, the second shell is provided with a second mounting groove, and the second shell is connected with the first shell, so that the second mounting groove and the first mounting groove enclose to form the mounting cavity;

the periphery of the vibrating diaphragm is clamped between the first shell and the second shell, so that the vibrating diaphragm and the first mounting groove are enclosed to form the rear sound cavity, and the vibrating diaphragm and the second mounting groove are enclosed to form the front sound cavity;

the magnetic circuit system further comprises a second magnetic circuit part arranged in the second mounting groove.

In an embodiment, the second housing includes a central portion and an edge portion disposed at an outer periphery of the central portion, the edge portion and the central portion enclose to form the second mounting groove, the edge portion bends and extends toward a direction away from the second magnetic circuit portion relative to the central portion so as to define a glue coating groove with the side portion, and the glue coating groove is filled with sealing glue.

In one embodiment, the venting area of the venting orifice is less than or equal to 0.02mm;

and/or the air leakage holes are round holes, oval holes, triangular holes, square holes or trapezoid holes;

And/or the shell is also provided with a sound outlet communicated with the front sound cavity, and the shell also comprises a sound nozzle arranged at the sound outlet.

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

According to the sound production device, the installation cavity is arranged in the shell, so that the vibration system and the magnetic circuit system are conveniently installed and fixed by the aid of the installation cavity, the installation cavity is divided into the front sound cavity and the rear sound cavity by the aid of the vibrating diaphragm of the vibration system, the voice coil is wired along the surface of the vibrating diaphragm, a strong magnetic field is generated by the aid of the magnetic circuit system, the vibrating diaphragm and the voice coil are located in the strong magnetic field intensity, magnetic induction lines at the vibrating diaphragm are distributed uniformly, the change of the magnetic field intensity is linear, sound quality of audio output by the sound production device can be effectively improved, and high-pitched sound effect is improved; meanwhile, the air leakage hole is formed in the plastic part of the shell, so that the air leakage hole is communicated with the rear acoustic cavity, a part of plastic part and/or part of magnetic circuit system is used to form a stop part, the air leakage area of the air leakage hole is directly opposite to the opening area of the part of air leakage hole to adjust the air leakage area of the air leakage hole, the air leakage hole can be used for realizing air leakage of the rear acoustic cavity, the air leakage area of the air leakage hole can be set according to different product requirements, and therefore the sound production device is guaranteed to be stable in frequency response performance under the high-temperature high-humidity environment.

Drawings

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

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

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

FIG. 3 is a schematic cross-sectional view of a sound generating apparatus according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of a portion of a sound generating apparatus according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of a portion of a sound generating apparatus according to an embodiment of the present invention;

fig. 6 is a chart showing FR performance test of the sound emitting device of the present invention and the prior art in a high temperature and high humidity environment.

Reference numerals illustrate:

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

Detailed Description

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

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

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

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

The loudspeaker, also called loudspeaker, is widely used as an electroacoustic transducer in electronic devices such as sound boxes, headphones, mobile phones and the like. The current speakers can be classified into moving coil speakers, moving iron speakers, and planar diaphragm speakers in terms of operation principle. The moving-coil loudspeaker has the advantages of simple structure, mature process and good performance, but has the defects of large vibration mass, poor transient characteristic, different degrees of swinging vibration generated by mass distribution, film compliance and asymmetric distribution of BL electromagnetic driving force, serious peak-valley generated by high-frequency response caused by split vibration of different frequencies, high product distortion caused by the nonlinear problem of the moving-coil loudspeaker and serious deterioration of acoustic performance. Moving iron type loudspeaker has the advantages of good transient response and high efficiency, but has the disadvantages of large distortion and narrow frequency response, and is commonly used in hearing aids.

To obtain better sound quality, planar diaphragm technology has emerged. A planar diaphragm loudspeaker applying planar diaphragm technology integrates a planar voice coil on the surface of a diaphragm and places the diaphragm in a magnetic field environment generated by a magnetic assembly. When an alternating current signal is passed through the coil, the coil is forced to drive the vibrating diaphragm to make reciprocating motion, so that the air density change is caused to sound. However, the magnetic field generated by the magnetic component of the planar diaphragm loudspeaker is unreasonable, so that the magnetic field intensity at the coil is weaker, the sensitivity of the planar diaphragm loudspeaker is insufficient, or the magnetic induction lines are unevenly distributed and the linearity is poorer; or the magnetic component is not provided with an air circulation channel inside, so that the magnetic component has larger obstruction to air flow. The problems of serious distortion of the output audio frequency of the planar vibrating diaphragm loudspeaker, poor tone quality and high sound effect and the like are caused.

In the related art, in order to pursue higher sound quality, electronic devices such as headphones often use multiple driving units, i.e., tweeters and woofers. However, the size of the tweeter is smaller and smaller, the structural design of the existing product is limited by the external size, and the sound leakage holes meeting the use requirement of the tweeter cannot be normally formed. Therefore, the rear cavity of the tweeter cannot be deflated, and the rear cavity and the front cavity form an air pressure difference, so that the frequency response performance is reduced under the high-temperature and high-humidity environment, the tone quality of the electronic equipment is affected, and the use effect of a user is affected. Meanwhile, the existing tweeter generally has the problems of poor tweeter effect and the like.

Based on the above concepts and problems, the present invention proposes a sound generating apparatus 100. It is to be understood that the sound generating apparatus 100 can be applied to electronic devices such as a speaker, a headset, a mobile phone, and the like, and is not limited herein.

Referring to fig. 1 to 5 in combination, in the embodiment of the invention, the sound generating apparatus 100 includes a housing 1, a vibration system 2 and a magnetic circuit 3, the housing 1 is provided with a mounting cavity 11, the vibration system 2 includes a vibrating diaphragm 21 and a voice coil 22 disposed in the mounting cavity 11, the vibrating diaphragm 21 divides the mounting cavity 11 into a front acoustic cavity 14 and a rear acoustic cavity 15, the voice coil 22 is disposed at one side of the vibrating diaphragm 21 to drive the vibrating diaphragm 21 to vibrate, and the magnetic circuit 3 is disposed in the mounting cavity 11; wherein, the shell 1 has a plastic part 126, the plastic part 126 is provided with a venting hole 121 communicated with the rear acoustic cavity 15, part of the plastic part 126 and/or part of the magnetic circuit system 3 is formed as a stop part, and the stop part is opposite to the opening area of part of the venting hole 121 to adjust the venting area of the venting hole 121.

It will be appreciated that the housing 1 is used to mount, fix, support and protect the components of the vibration system 2, the magnetic circuit system 3, etc., i.e. the housing 1 provides a mounting base for the components of the vibration system 2, the magnetic circuit system 3, etc. It will be appreciated that the housing 1 may be a mounting shell, housing or case having a mounting cavity 11, and is not limited herein.

In the present embodiment, the housing 1 may be provided in a circular or square structure or the like, and is not limited herein. The housing 1 includes a first casing 12 and a second casing 13 mated with the first casing 12 such that the first casing 12 and the second casing 13 enclose a mounting cavity 11. It will be appreciated that the second housing 13 may be provided in a U-shaped configuration, which may include a planar bottom wall and side walls provided to the bottom wall. The first housing 12 may also be provided in a U-shaped configuration, which may include a flat top wall and side walls of the top wall, respectively. The first housing 12 and the second housing 13 are thus fastened together in a crossing manner to define the installation cavity 11 for installing the components such as the vibration system 2 and the magnetic circuit system 3. Of course, in other embodiments, the second housing 13 may also be a flat plate structure, which is not limited herein.

It will be appreciated that the vibration system 2 includes a diaphragm 21 and a voice coil 22, the voice coil 22 is disposed on the diaphragm 21, and the diaphragm 21 may be alternatively a flat diaphragm structure, such that the voice coil 22 is disposed on a flat surface of the diaphragm 21. In this embodiment, the voice coil 22 may be a flexible circuit board attached to the diaphragm 21. The voice coil 22 may be constituted by a plurality of coils provided on the same surface of the diaphragm 21, and is not limited thereto.

Alternatively, the diaphragm 21 may be made of a metal material or a non-metal material, such as paper, PET (polyester film), PEEK (polyether ether ketone), PAR (polyarylate), PI (polyimide), PEN, woven glass fiber, or aluminum, but not limited thereto. Further, the diaphragm 21 may be a metal planar diaphragm.

In this embodiment, the magnetic circuit system 3 is disposed in the mounting cavity 11, and a stronger magnetic field is formed by using the magnetic circuit system 3, so that the diaphragm 21 and the voice coil 22 of the vibration system 2 are in the stronger magnetic field strength, and the magnetic induction lines at the diaphragm 21 are uniformly distributed, and the change of the magnetic field strength has good linearity, so that the tone quality of the audio output by the sound generating device 100 can be effectively improved, and the high-pitch effect can be improved.

It will be appreciated that the voice coil 22 is routed along the surface of the diaphragm 21 and is opposite to the magnetic circuit 3, and the central axis of the voice coil 22 is perpendicular to the diaphragm 21, and the voice coil 22 has at least a first wire segment 221 and a second wire segment 222 disposed opposite to each other, and the directions of currents in the first wire segment 221 and the second wire segment 222 are opposite. So that the diaphragm 21 and the voice coil 22 are located in the magnetic field formed by the magnetic circuit system 3, so as to generate magnetic force acting on the voice coil 22 when current is applied to the voice coil 22, and further drive the diaphragm 21 to vibrate reciprocally in the direction of the magnetic force to generate sound. It can be appreciated that after the current is applied to the voice coil 22, the current flows in the opposite directions in the first wire segment 221 and the second wire segment 222 in the voice coil 22.

In this embodiment, as shown in fig. 1 to 6, the housing 1 has a plastic part 126, and by providing the plastic part 126 of the housing 1 with the air release hole 121, after the diaphragm 21 of the vibration system 2 separates the mounting cavity 11 into the front acoustic cavity 14 and the rear acoustic cavity 15, the air release hole 121 is communicated with the rear acoustic cavity 15, so that air release is implemented on the rear acoustic cavity 15 by using the air release hole 121 to balance the air pressure difference between the front acoustic cavity 14 and the rear acoustic cavity 15, so that the sound generating apparatus 100 can keep stable frequency response performance in a high-temperature and high-humidity environment, thereby improving the sound quality of the electronic device and improving the use effect of a user (as shown in fig. 6). The plastic part 126 is provided with the air vent hole 121, so that the process difficulty is relatively low compared with the process of providing the air vent hole 121 on a metal shell, and the machining precision of the air vent hole 121 can be ensured.

It can be appreciated that the stopping portion is formed on the plastic portion 126 and/or the magnetic circuit system 3, and the stopping portion is opposite to the opening area of the part of the air release hole 121 to adjust the air release area of the air release hole 121, so that the air release area is adjusted according to the actual requirement of the sound generating device 100, the process difficulty is greatly reduced, and the operation is convenient.

According to the sound production device 100, the installation cavity 11 is arranged in the shell 1, so that the vibration system 2 and the magnetic circuit system 3 are conveniently installed and fixed by the aid of the installation cavity 11, the installation cavity 11 is divided into the front sound cavity 14 and the rear sound cavity 15 by the aid of the vibrating diaphragm 21 of the vibration system 2, the voice coil 22 is arranged along the surface of the vibrating diaphragm 21, the magnetic circuit system 3 is arranged in the installation cavity 11 and is opposite to the voice coil 22, a strong magnetic field is generated by the aid of the magnetic circuit system 3, the vibrating diaphragm 21 and the magnetic induction lines at the vibrating diaphragm 21 are uniformly distributed, the change of the magnetic field strength has good linearity, sound quality of audio output by the sound production device 100 can be effectively improved, and high-pitched sound effects are improved; meanwhile, the air release hole 121 is formed in the plastic part 126 of the shell 1, so that the air release hole 121 is communicated with the rear acoustic cavity 15, and a part of the plastic part 126 and/or a part of the magnetic circuit system 3 are/is used to form a stop part, and the stop part is opposite to the opening area of the part of the air release hole 121 to adjust the air release area of the air release hole 121, so that the air release hole 121 can be used for realizing air release of the rear acoustic cavity 15, and the air release area of the air release hole can be set according to different product requirements, thereby ensuring that the sound production device 100 has stable frequency response performance in a high-temperature and high-humidity environment.

In an embodiment, an air channel 123 is formed between the magnetic circuit system 3 and the inner wall of the housing 1 at intervals, and the air flow of the rear acoustic cavity 15 circulates to the air leakage hole 121 through the air channel 123.

In this embodiment, the air channel 123 is formed by arranging the magnetic circuit system 3 at a distance from the inner wall of the housing 1, so that the air flow of the rear acoustic cavity 15 is enabled to circulate to the air release hole 121 through the air channel 123 by using the air channel 123, thereby realizing air release.

In one embodiment, the housing 1 includes a first shell 12 and a second shell 13, wherein the first shell 12 is provided with a first mounting groove 122 and a vent hole 121 communicating with the first mounting groove 122, the second shell 13 is provided with a second mounting groove 131, and the second shell 13 is connected with the first shell 12, so that the second mounting groove 131 and the first mounting groove 122 enclose a mounting cavity 11; the periphery of the diaphragm 21 is sandwiched between the first housing 12 and the second housing 13, so that the diaphragm 21 and the first mounting groove 122 enclose a rear acoustic cavity 15, and the diaphragm 21 and the second mounting groove 131 enclose a front acoustic cavity 14.

As shown in fig. 2 and 3, by providing the housing 1 as a two-part structure of the first casing 12 and the second casing 13, assembly of the components of the vibration system 2 and the magnetic circuit system 3, etc. is facilitated. It can be appreciated that the first housing 12 and the second housing 13 may be fixedly connected into an integral structure by adopting a sealing fit such as welding, bonding, etc., so that the connection stability and sealing performance of the first housing 12 and the second housing 13 can be improved. Of course, in other embodiments, the first housing 12 and the second housing 13 may be connected as an integral structure by a detachable connection manner such as a snap connection, an insertion connection, a screw connection, or a pin connection, so as to facilitate the disassembly and replacement of the components such as the vibration system 2 and the magnetic circuit system 3. When the first housing 12 and the second housing 13 are integrally connected, the second mounting groove 131 and the first mounting groove 122 enclose and form the mounting cavity 11.

In the present embodiment, the magnetic circuit system 3 includes the first magnetic circuit portion 31 and the second magnetic circuit portion 32, the first magnetic circuit portion 31 is provided in the first mounting groove 122, the second magnetic circuit portion 32 is provided in the second mounting groove 131, that is, the first magnetic circuit portion 31 is located in the rear acoustic chamber 15, and the second magnetic circuit portion 32 is located in the front acoustic chamber 14.

It can be understood that by arranging the first magnetic circuit portion 31 and the second magnetic circuit portion 32 on opposite sides of the diaphragm 21, the first magnetic circuit portion 31 and the second magnetic circuit portion 32 form a stronger magnetic field on opposite sides of the diaphragm 21 and the voice coil 22, so that the diaphragm 21 and the voice coil 22 of the vibration system 2 are in the stronger magnetic field strength, the magnetic induction lines at the diaphragm 21 are uniformly distributed, the change of the magnetic field strength has good linearity, the tone quality of the audio output by the sound generating device 100 can be effectively improved, and the high-pitch effect is improved.

Alternatively, the first magnetic circuit portion 31 of the magnetic circuit system 3 may be an electromagnet or a permanent magnet, but its magnetic properties remain unchanged. The second magnetic circuit portion 32 may be an electromagnet or a permanent magnet, but its magnetic properties remain unchanged.

In one embodiment, the housing 1 includes a first shell 12, where the first shell 12 includes a bottom 124 and a side 125 disposed at a periphery of the bottom 124, the bottom 124 and the side 125 enclose to form a first mounting groove 122, at least a portion of the bottom 124 is formed by a plastic portion 126, and the air vent 121 is disposed at the bottom 124 and correspondingly communicates with the air channel 123; the magnetic circuit 3 includes a first magnetic circuit portion 31 provided in the first mounting groove 122, the first magnetic circuit portion 31 being connected to the bottom 124 and spaced apart from the side 125 to form an air passage 123.

In the present embodiment, as shown in fig. 1 to 5, by disposing the air release hole 121 at the bottom 124 of the first housing 12, on the one hand, the processing of the first housing 12 is facilitated, and on the other hand, the appearance aesthetic property of the sound generating device 100 can be improved. It will be appreciated that the first magnetic circuit portion 31 may be attached to the bottom portion 124 by bonding, welding, or the like, and the first magnetic circuit portion 31 and the side portion 125 are spaced apart to form an air passage 123 communicating with the rear acoustic chamber 15, and the air release hole 121 of the bottom portion 124 communicates with the air passage 123 correspondingly, thereby realizing air release of the rear acoustic chamber 15.

Optionally, the side 125 of the first housing 12 is perpendicular to the bottom 124. The bottom 124 is optionally square in configuration. In order to adjust the size of the venting area, the venting holes 121 may be multiple, and the venting holes 121 are spaced apart and are correspondingly communicated with the air channel 123. Of course, the air leakage hole 121 may also be a strip-shaped or annular hole structure, which is correspondingly communicated with the air channel 123, and is not limited herein.

In the present embodiment, the air release hole 121 may be selected from a circular hole, an elliptical hole, a triangular hole, a square hole, or a trapezoidal hole, which is not limited herein. In order to secure the frequency response performance of the sound generating apparatus 100, the air release area of the air release hole 121 is less than or equal to 0.02mm.

In one embodiment, the housing 1 includes a second shell 13, where the second shell 13 is provided with a second mounting groove 131, and the second shell 13 is connected with the first shell 12, so that the second mounting groove 131 and the first mounting groove 122 enclose a mounting cavity 11; the periphery of the diaphragm 21 is clamped between the first shell 12 and the second shell 13, so that the diaphragm 21 and the first mounting groove 122 are enclosed to form a rear acoustic cavity 15, and the diaphragm 21 and the second mounting groove 131 are enclosed to form a front acoustic cavity 14; the magnetic circuit system 3 further comprises a second magnetic circuit portion 32 provided in the second mounting groove 131.

In this embodiment, as shown in fig. 4, the periphery of the diaphragm 21 is sandwiched between the first housing 12 and the second housing 13, so that the diaphragm 21 and the first mounting groove 122 enclose a rear acoustic cavity 15, and the diaphragm 21 and the second mounting groove 131 enclose a front acoustic cavity 14, so that not only the mounting stability of the diaphragm 21 can be improved, but also the space between the first mounting groove 122 and the second mounting groove 131 can be utilized to provide sufficient vibration space for the diaphragm 21.

In an embodiment, the air leakage hole 121 includes a first segment 1211 and a second segment 1212, the first segment 1211 is disposed through the plastic portion 126 and corresponds to the air channel 123, and the second segment 1212 is disposed concavely on a side of the plastic portion 126 facing the air channel 123 and communicates with the first segment 1211, such that the plastic portion 126 corresponding to the first segment 1211 forms a stop.

It will be appreciated that the first segment 1211 is disposed through the bottom 124 and corresponds to the air passage 123, and the second segment 1212 is disposed concavely on the side of the side 125 facing the air passage 123 and communicates with the first segment 1211.

In the present embodiment, as shown in fig. 4, by arranging the air release hole 121 as the first segment 1211 disposed at the bottom 124 and the second segment 1212 concavely disposed at the side of the side portion 125 facing the air channel 123, the second segment 1212 is correspondingly communicated with the first segment 1211, and the plastic portion 126 corresponding to the first segment 1211 forms a stop portion, so that by controlling the extension length of the second segment 1212 along the side portion 125 and the stop portion, the air release area of the air release hole 121 can be effectively controlled and adjusted.

It is understood that the first section 1211 may be a circular hole, an oval hole, a triangular hole, a square hole, a trapezoid hole, etc. disposed through the bottom 124, which is not limited herein. The second segment 1212 may be a groove structure recessed in the side 125, and thus the venting area of the vent hole 121 may be adjusted by controlling the depth of the groove structure.

In one embodiment, the first housing 12 includes a plastic portion 126 and the metal member 127 integrally molded, the metal member 127 includes a bottom plate 1271 and a side plate 1272 connected to the bottom plate 1271, the plastic portion 126 is disposed on a periphery of the bottom plate 1271 and connected to the side plate 1272, the plastic portion 126 cooperates with the side plate 1272 to form the side portion 125, the plastic portion 126 is provided with a lug 128 extending toward the bottom plate 1271, such that the lug 128 cooperates with the bottom plate 1271 to form the bottom 124, and the vent hole 121 is opened in the lug 128.

In this embodiment, as shown in fig. 1 to 5, by arranging the first housing 12 as the plastic part 126 and the metal member 127, the bottom plate 1271 of the metal member 127 is used as the main part of the bottom 124 of the first housing 12, so that the first magnetic circuit portion 31 is fixed on the bottom plate 1271 of the metal member 127, thereby improving the heat dissipation effect of the sound generating device 100 by using the metal member 127, and effectively improving the volume of the sound cavity 15 behind the sound generating device 100. Alternatively, the metal member 127 is a metal sheet, and the bottom plate 1271 and the side plate 1272 may be integrally connected by bending or stamping, which is not limited herein.

It can be appreciated that the plastic part 126 is a plastic part, and the plastic part 126 and the metal part 127 can be integrally formed by injection molding, so that the structural strength of the first housing 12 can be improved, and the sealing effect of the first housing 12 can be improved.

In the present embodiment, the lug 128 extending toward the bottom plate 1271 is disposed on the plastic portion 126, such that the lug 128 is used as a part of the bottom 124 of the first housing 12, so that the vent hole 121 can be formed by a mold or the like, thereby conveniently controlling and adjusting the aperture of the vent hole 121 and the venting area of the vent hole 121.

In one embodiment, a portion of the first magnetic circuit portion 31 covers a portion of the vent hole 121 such that a portion of the first magnetic circuit portion 31 facing the open area of the vent hole 121 forms a stop. It will be appreciated that by covering part of the vent hole 121 with the first magnetic circuit portion 31, it is possible to achieve effective control and adjustment of the vent area of the vent hole 121.

In an embodiment, the second housing 13 includes a central portion 133 and an edge portion 134 disposed on an outer periphery of the central portion 133, the edge portion 134 and the central portion 133 enclose to form a second mounting groove 131, the edge portion 134 is bent and extended toward a direction away from the second magnetic circuit portion 32 relative to the central portion 133 to define a glue coating groove 135 with the side portion 125, and the glue coating groove 135 is filled with sealing glue.

In the present embodiment, as shown in fig. 2 and 3, by providing the second housing 13 as the center portion 133 and the edge portion 134 such that the edge portion 134 is connected to the outer periphery of the center portion 133, the second mounting groove 131 is formed by enclosing the center portion 133 and the edge portion 134. It will be appreciated that the second magnetic circuit portion 32 is fixed to the central portion 133. By bending the edge portion 134 relative to the center portion 133 in a direction away from the second magnetic circuit portion 32, the edge portion 134 of the second housing 13 and the side portion 125 of the second housing 13 define a glue groove 135 when the second housing 13 is connected to the first housing 12 by the edge portion 134. Optionally, the rim portion 134 is optionally L-shaped in configuration.

It will be appreciated that by filling the glue groove 135 with the sealing glue, the sealing glue is solidified to form a seal, so that the connection stability and sealing performance between the first housing 12 and the second housing 13 can be effectively improved.

In an embodiment, the housing 1 is further provided with an acoustic port 132 communicating with the front acoustic chamber 14, and the housing 1 further comprises a mouthpiece 16 provided at the acoustic port 132. It will be appreciated that by providing the sound outlet 132 in the central portion 133 of the second housing 13, sound generated by vibration of the diaphragm 21 is facilitated to be transmitted out of the casing 1 through the sound outlet 132. The transmission effect can be improved by providing the mouthpiece 16.

In an embodiment, as shown in fig. 2 and 3, the diaphragm 21 includes a central portion 211, a ring portion 212 disposed around the central portion 211, and a fixing portion 213 disposed outside the ring portion 212, wherein the fixing portion 213 is sandwiched between the edge portion 134 and the side portion 125. It will be appreciated that the voice coil 22 is routed along the surface of the central portion 211 and is opposite the first magnetic circuit portion 31. The fixing portion 213 of the diaphragm 21 is sandwiched between the edge portion 134 and the side portion 125, so that not only can the mounting stability of the diaphragm 21 be improved, but also the effective vibration area of the diaphragm 21 can be increased, and the sound producing effect of the sound producing device 100 can be improved.

Alternatively, the folded ring portion 212 protrudes toward the rear acoustic chamber 15, and the extending direction of the fixing portion 213 is opposite to the protruding direction of the folded ring portion 212.

In one embodiment, the diaphragm 21 is a single layer of metallic material. It will be appreciated that the diaphragm 21 may alternatively be a planar single-layer piece of metal material, thereby increasing the sensitivity of the diaphragm 21. Alternatively, the diaphragm 21 is an aluminum plate or the like, which is not limited herein.

Of course, in other embodiments, the diaphragm 21 may be made of a single-layer film material such as PET (polyester film), PEEK (polyether ether ketone), PAR (polyarylate), PI (polyimide), and the like, which is not limited herein.

Because the diaphragm 21 made of the single-layer film material is either too hard and brittle, the surface of the diaphragm 21 is uneven when the tension is small, and the diaphragm 21 is too tight when the tension is large, so that the diaphragm is easy to break; or too soft, the surface tension of the diaphragm 21 is insufficient and because the diaphragm 21 is too easily stretched, the tension becomes smaller and smaller with time or after vibration, eventually resulting in too loose the diaphragm 21. In addition, the internal damping of the single-layer film material is insufficient, and the trailing edge characteristic of the transient characteristic of the diaphragm 21 is poor, that is, when the vibration coil stops being energized, the diaphragm 21 needs to delay for a longer time to stop vibrating due to the excessively small internal damping. In one embodiment, the diaphragm 21 is formed as a composite layer structure, and at least the surface of the diaphragm 21 connected to the voice coil 22 is made of a metal material.

It will be appreciated that by providing the diaphragm 21 as a composite layer structure, the diaphragm 21 is provided with good support and sufficient rigidity. In this embodiment, the surface of the diaphragm 21 connected to the voice coil 22 is made of a metal material, so that the metal material can be used to perform a good supporting function and provide sufficient rigidity, and other composite structures of the diaphragm 21 are used to provide good elasticity and sufficient damping, so that the diaphragm 21 has a low distortion effect in a relatively large vibration range.

In this embodiment, the diaphragm 21 may be a double-layer or multi-layer composite structure, which is not limited herein. In this embodiment, the diaphragm 21 includes a first sub-diaphragm and a second sub-diaphragm, where the first sub-diaphragm can play a good supporting role and provide sufficient rigidity, and the second sub-diaphragm can provide good elasticity and sufficient damping, so that the diaphragm 21 has a low distortion effect in a relatively large vibration range.

It is understood that the material of the first sub-diaphragm may be selected from metal materials, such as aluminum plate, etc., and the material of the second sub-diaphragm may be selected from PEEK (polyetheretherketone), PAR (polyarylate), TPU (thermoplastic polyurethane elastomers), TPE (Thermoplastic Elastomer, thermoplastic elastomers), etc. The first sub-diaphragm and the second sub-diaphragm can be bonded by an adhesive layer such as acrylic, silica gel or other soft polymer materials, and the like, and the bonding is not limited herein.

In one embodiment, the vibration system 2 further comprises a stiffening member 23, the stiffening member 23 being disposed between the central portion 211 and the voice coil 22. It will be appreciated that by providing the reinforcing member 23, the center portion 211 of the diaphragm 21 can be reinforced by the reinforcing member 23, and the vibration effect can be improved. The stiffener 23 has a hardness greater than that of the diaphragm 21 to stiffen the surface of the diaphragm 21 as a whole so that the surface of the diaphragm 21 has a uniform vibration amplitude as much as possible, and the diaphragm 21 exhibits a whole piston vibration.

Alternatively, the shape of the reinforcement 23 may be circular, and of course, the shape of the reinforcement 23 may be a bar, a comb, or the like. In an embodiment, a plurality of reinforcing members 23 are disposed on the diaphragm 21, and the extending direction of the reinforcing members 23 intersects with the voice coil 22, optionally perpendicular, so as to form a cross grid shape, and the voice coil 22 can also play a role of reinforcing the overall rigidity of the surface of the diaphragm 21, and the voice coil 22 and the reinforcing members 23 together reinforce the overall rigidity of the surface of the diaphragm 21.

In one embodiment, as shown in FIG. 2, the voice coil 22 is formed in a square shape. It will be appreciated that by arranging the voice coil 22 in a square configuration such that the voice coil 22 includes a first straight edge and a second straight edge that are sequentially connected, i.e., the first wire segment 221 and the second wire segment 222 of the voice coil 22 are respectively two opposite first straight edges or two second straight edges, the arrangement is such that the voice coil 22 effectively increases magnetic flux relative to a conventional racetrack voice coil.

Alternatively, the number of the voice coils 22 is two, and the two voice coils 22 are provided on the upper and lower sides of the diaphragm 21. It will be appreciated that the voice coil 22 may be formed by printing, or vapor deposition, or 3D printing on the surface of the diaphragm 21. The voice coil 22 may be provided on only one surface of the diaphragm 21, or the voice coil 22 may be provided on both side surfaces of the diaphragm 21, which is not limited herein.

By applying current to the voice coil 22, the diaphragm 21 is driven to vibrate in a predetermined direction to generate sound, wherein the direction of the magnetic force applied to the voice coil 22 is changed continuously by changing the current flow direction in the voice coil 22, so as to control the diaphragm 21 to vibrate reciprocally. It will be appreciated that the greater the number of voice coils 22, the greater the magnetic force driving the vibration of the diaphragm 21 and the greater the sensitivity of controlling the vibration of the diaphragm 21. However, the dimensions of the surface of the diaphragm 21 and the product specifications of the sound generating apparatus 100 are also considered, and are not limited thereto.

In the present embodiment, the wire material of the voice coil 22 may be aluminum, copper, nickel, gold, silver, or an alloy of these metals, which is not limited herein.

Since only the portion of the surface of the diaphragm 21 where the voice coil 22 is provided receives the magnetic force, and the portion where the voice coil 22 is not provided receives the magnetic force, the portion of the surface of the diaphragm 21 where the voice coil 22 is provided and the portion where the voice coil 22 is not provided exhibit different divided vibrations, i.e., the vibration amplitude of the portion of the surface of the diaphragm 21 where the voice coil 22 is provided is larger than that of the portion where the voice coil 22 is not provided. In this way, the peak-valley of the frequency response curve of the sound generating device 100 will be generated, so that the audio output by the sound generating device 100 will be distorted, and the acoustic performance of the sound generating device 100 will be deteriorated.

In view of this, the vibration system 2 further includes a reinforcing member 23, and the reinforcing member 23 is disposed on the surface of the diaphragm 21.

In one embodiment, the first magnetic circuit portion 31 includes at least three first magnetic pieces 311 arranged in the horizontal direction.

In this embodiment, as shown in fig. 2, the first magnetic member 311 may be an electromagnet or a permanent magnet, but its magnetism remains unchanged. Any adjacent first magnetic members 311 may be alternatively arranged at intervals or arranged in a abutting manner, or arranged in a connecting manner by a connecting member, etc., which is not limited herein.

Of course, the second magnetic circuit portion 32 comprises at least one second magnetic member, which may be an electromagnet or a permanent magnet, but whose magnetic properties remain unchanged. Any adjacent second magnetic elements may be alternatively arranged at intervals or arranged in a abutting manner, or arranged in a connecting manner by connecting elements, etc., without limitation.

It can be understood that when one first magnetic element 311 of the at least three first magnetic elements 311 of the first magnetic circuit portion 31 in the magnetic circuit system 3 is magnetized in the vertical direction, the magnetizing directions of the two adjacent first magnetic elements 311 are opposite, that is, the two first magnetic elements 311 with opposite magnetizing directions are alternately arranged, so as to form a magnetic element array, and generate a magnetic field with a stronger magnetic field strength.

Optionally, at least three first magnetic elements 311 of the first magnetic circuit portion 31 in the magnetic circuit system 3 may also form an halbach magnetic element array, so that according to the magnetic field rule of the halbach array, the magnetic field of the portion of the surface of the diaphragm 21 corresponding to the first magnetic element 311 is better than the magnetic field of the portion not corresponding to the first magnetic element 311, including the aspects of magnetic field strength, linearity of the magnetic field strength along with the change of the position, and uniformity of distribution of magnetic induction lines.

It will be appreciated that the voice coil 22 may alternatively be provided in an area defined by the orthographic projection of the first magnetic member 311 on the surface of the diaphragm 21. Optionally, the orthographic projection of the voice coil 22 on the surface of the diaphragm 21 is located in the orthographic projection of the first magnetic member 311 on the surface of the diaphragm 21, so that the voice coil 22 is in a more reasonable magnetic field, thereby alleviating the distortion of the audio output by the sound generating device 100 and improving the quality of the audio output by the sound generating device 100.

Because the magnetic induction lines in the two adjacent first magnetic pieces 311 are opposite in direction, the directions of the magnetic forces borne by the voice coils 22 corresponding to the two adjacent first magnetic pieces 311 are the same, so that the vibrating diaphragm 21 is driven to vibrate and sound, the proportion of reasonable magnetic places in the magnetic field at the vibrating diaphragm 21 is improved, namely the proportion of the surface of the vibrating diaphragm 21 corresponding to the first magnetic pieces 311 is improved, the rationality of the magnetic field where the vibrating diaphragm 21 is positioned is improved, the distortion condition of the audio output by the sound generating device 100 is relieved, and the tone quality of the audio output by the sound generating device 100 is improved.

It can be appreciated that the distances from the surfaces of the adjacent first magnetic members 311 adjacent to the diaphragm 21 are the same, so as to further improve the rationality of the magnetic field in which the diaphragm 21 is located, further alleviate the distortion 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.

In the present embodiment, the magnetizing directions of two adjacent first magnetic pieces 311 in the at least three first magnetic pieces 311 of the first magnetic circuit portion 31 are opposite, that is, when the N pole of one first magnetic piece 311 of the two adjacent first magnetic pieces 311 is up and the S pole is down, the N pole of the other first magnetic piece 311 is down and the S pole is up, and vice versa. Of course, in other embodiments, two adjacent first magnetic pieces 311 are spaced apart, so that a horizontal magnetic field can be formed directly above the spacing.

In an embodiment, the first magnetic member 311 located at the middle position is magnetized downward along the vertical direction, and the first magnetic members 311 located at the two ends are magnetized along the horizontal direction and the direction away from the middle first magnetic member 311, respectively.

It will be appreciated that a first magnetic member 311 is disposed between two adjacent first magnetic members 311, that is, an N pole of the first magnetic member 311 located between two adjacent first magnetic members 311 is opposite to and spaced apart from one first magnetic member 311, and an S pole is opposite to and spaced apart from the other first magnetic member 311, which is not limited herein. Alternatively, the two first magnetic pieces 311 located at two sides of the middle first magnetic piece 311 are arranged in a transverse direction, for example, when the N pole of the middle first magnetic piece 311 is on the lower side and the S pole is on the upper side, the S poles of the two first magnetic pieces 311 located at two sides of the middle first magnetic piece 311 are located at one end close to the middle first magnetic piece 311, and the N pole is located at one end far from the middle first magnetic piece 311, and vice versa, which is not limited herein.

Of course, in other embodiments, the first magnetic member 311 located at the middle position is magnetized upward along the vertical direction, and the first magnetic members 311 located at the two ends are magnetized along the horizontal direction and toward the direction close to the middle first magnetic member 311, respectively.

In an embodiment, the number of the first magnetic members 311 is three, the number of the second magnetic members is one, and the magnetizing direction of the second magnetic members is opposite to the magnetizing direction of the first magnetic member 311 located at the middle position. By reversing the magnetizing direction of the second magnetic member to the magnetizing direction of the first magnetic member 311 located at the middle position of the first magnetic circuit portion 31, the magnetic induction lines of the magnetic field where the diaphragm 21 is located are distributed more uniformly, and the magnetic field intensity variation in the vibrating direction of the diaphragm 21 has better linearity, so that the performance of the sound generating device 100 is optimized, and the BL of the sound generating device 100 is raised by 37.64%.

In an embodiment, the number of the second magnetic elements is the same as the number of the first magnetic elements 311, and the magnetizing directions of the first magnetic elements 311 and the second magnetic elements corresponding up and down are opposite.

In the present embodiment, the first magnetic members 311 are three, five or more; correspondingly, the number of the second magnetic pieces is one, three, five or more, so that the magnetizing directions of the first magnetic pieces 311 and the second magnetic pieces which are vertically corresponding are opposite. It can be understood that by arranging the second magnetic circuit portion 32 and the first magnetic circuit portion 31 on opposite sides of the vibration system 2, and making the magnetizing directions of the first magnetic element 311 in the first magnetic circuit portion 31 and the magnetizing directions of the second magnetic element in the second magnetic circuit portion 32 opposite to each other, that is, making the magnetic fields generated by the magnetic element arrays on the two side surfaces of the diaphragm 21 symmetrical, the distribution of the induction lines of the magnetic field where the diaphragm 21 is located is more uniform, and the magnetic field intensity variation in the vibration direction of the diaphragm 21 has better linearity.

Alternatively, the first magnetic circuit portion 31 and the second magnetic circuit portion 32 located on opposite sides of the vibration system 2 may form halbach magnetic element arrays, respectively. Of course, in other embodiments, the first magnetic circuit portion 31 and the second magnetic circuit portion 32 located on opposite sides of the vibration system 2 may also form other magnetic element arrays, which are not limited herein.

In some embodiments of the present invention, by controlling the magnetizing directions of the first magnetic circuit portion 31 and the second magnetic circuit portion 32 so that the second magnetic circuit portion 32 and the first magnetic circuit portion 31 form halbach magnetic element arrays on two side surfaces of the diaphragm 21, respectively, it is beneficial to alleviate the second harmonic distortion and the third harmonic distortion of the diaphragm 21, further alleviate the distortion 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. In the present embodiment, by appropriately adjusting the size of the second magnetic circuit portion 32 so that the size of the second magnetic circuit portion 32 is intermediate to the size of the first magnetic circuit portion 31, the effective magnetic field is fully utilized, and the BL value of the sound generating apparatus 100 is further increased.

In the present embodiment, the BL value of the sound generating apparatus 100 is improved by 37.12% by changing the different magnetizing directions of the second magnetic circuit portion 32 and the first magnetic circuit portion 31 on opposite sides of the vibration system 2.

In the present embodiment, the first magnetic circuit portion 31 includes three first magnetic pieces 311, for example, a middle first magnetic piece 311 and adjacent first magnetic pieces 311 on both sides of the middle first magnetic piece 311, and the halbach magnetic piece array is formed by adjusting the magnetizing directions of the three first magnetic pieces 311 in the first magnetic circuit portion 31. It will be appreciated that by setting the magnetizing directions of the three first magnetic pieces 311 such that the first magnetic pieces 311 located at the intermediate positions are magnetized downward in the vertical direction, the first magnetic pieces 311 located at both ends are respectively magnetized in the horizontal and facing directions away from the intermediate first magnetic pieces 311, thereby generating a magnetic field constituted by alternating polarity loops that emanate from the intermediate first magnetic pieces 311, curve along paths above the first magnetic pieces 311 polarized in the +and-X directions, and finally return to the first magnetic pieces 311 on the outermost portions of the array.

In an embodiment, the first magnetic pieces 311 include five first magnetic pieces 311 in the middle position are magnetized downward in the vertical direction, two first magnetic pieces 311 in two ends are magnetized upward in the vertical direction, and two first magnetic pieces 311 disposed on two sides of the first magnetic piece 311 in the middle position are magnetized horizontally and toward the direction away from the first magnetic piece 311 in the middle position.

It will be understood that the first magnetic circuit portion 31 includes five first magnetic pieces 311 arranged in the horizontal direction, the first magnetic piece 311 located at the intermediate position is magnetized downward in the vertical direction, the two first magnetic pieces 311 located at both ends are magnetized upward in the vertical direction, and the two first magnetic pieces 311 located at both sides of the first magnetic piece 311 located at the intermediate position are magnetized in the directions horizontally and toward the first magnetic pieces 311 away from the intermediate position, respectively.

The first magnetic circuit portion 31 includes three, five or more first magnetic members 311, and the first magnetic circuit portion 31 of the halbach array is formed by adjusting magnetizing directions of the three, five or more first magnetic members 311 in the first magnetic circuit portion 31. In the present embodiment, by setting the magnetizing directions of the five first magnetic pieces 311 such that the first magnetic pieces 311 located at the intermediate positions are magnetized downward in the vertical direction, the two first magnetic pieces 311 located at both ends are magnetized upward in the vertical direction, and the two or more first magnetic pieces 311 located at both sides of the first magnetic piece 311 located at the intermediate positions are magnetized in the directions horizontal and away from the first magnetic pieces 311 at the intermediate positions, respectively, thereby generating a magnetic field composed of alternating polarity loops that are sent from the intermediate first magnetic pieces 311, are bent along the paths above the first magnetic pieces 311 polarized in the +and-X directions, and finally return to the first magnetic pieces 311 on the outermost portion of the array.

In one embodiment, a connecting member is disposed between two adjacent first magnetic members 311 to define an assembly gap between the two first magnetic members 311.

In the present embodiment, by providing the connection member between the adjacent two first magnetic members 311, the first magnetic members 311 are fixed by the connection member to ensure that the relative positional relationship of the first magnetic circuit portion 31 and the diaphragm 21 is also fixed, thereby ensuring the vibration frequency of the diaphragm 21. Meanwhile, the connecting piece arranged between two adjacent first magnetic pieces 41 is used for limiting the assembly gap between the two first magnetic pieces 311, so that on one hand, the first magnetic circuit part 31 is conveniently assembled by the assembly gap, and on the other hand, the obstruction of the magnetic field to the air flow can be reduced by the assembly gap, so that the sound generating device 100 has good air compliance, the tone quality of the audio output by the sound generating device 100 is further improved, the high-pitch effect is improved, and meanwhile, the distortion condition of the audio output by the sound generating device 100 is relieved.

It can be appreciated that the two adjacent first magnetic members 311 may also be disposed at intervals, so that an airflow channel is formed between the two adjacent first magnetic members 311 to allow airflow to circulate in the magnetic field, thereby reducing the obstruction of the magnetic field to the airflow, and enabling the sound generating device 100 to have good air compliance, so as to further alleviate distortion of the audio output by the sound generating device 100, and improve the tone quality and the treble effect of the audio output by the sound generating device 100.

Of course, in other embodiments, the two adjacent first magnetic members 311 may be fixed in position relative to each other by gluing, mechanical pressing, and fixing to an external structure such as a bracket, so that the relative positional relationship between the first magnetic circuit portion 31 and the second magnetic circuit portion 32 on two sides of the diaphragm 21 and the diaphragm 21 is also ensured to be fixed, which is not limited herein.

Optionally, the spacing between any two adjacent first magnetic pieces 311 is uniform. Of course, in other embodiments, the first magnetic member 311 may be configured in a ring-like magnetic structure, which is not limited herein. The first magnetic member 311/second magnetic member of the first magnetic circuit portion 31 and the second magnetic circuit portion 32 may also be provided as sheets of magnetic material, for example different areas of powdered ferrite in an adhesive being exposed to different magnetic fields for magnetization. Alternatively, the first magnetic member 311/second magnetic member of the first magnetic circuit portion 31 and the second magnetic circuit portion 32 may be independent magnets, such as magnetic strips, which may be magnetized in different directions and then arranged side by side to effectively form a planar magnetic array with a rotating magnetic field, without limitation.

In one embodiment, two adjacent first magnetic members 311 are disposed against each other. It is to be understood that the two adjacent first magnetic members 311 may be fixed by gluing or mechanical pressing, which is not limited herein.

As shown in fig. 6, fig. 6 is a diagram of a reliability performance test of a conventional tweeter (i.e., a rear cavity cannot be deflated) and the sound generating apparatus 100 of the present application in a high-temperature and high-humidity environment. As can be seen from fig. 6, the reliability of the conventional tweeter is poor in a high-temperature and high-humidity environment because the rear cavity cannot be deflated, which results in a decrease in the Frequency Response (FR) performance, thereby affecting the sound quality of the electronic device and affecting the use effect of the user. The sound generating device 100 of the present application is provided with the air release hole 121, so that the part of the plastic part 126 and/or the part of the magnetic circuit system 3 is formed into the stop part, and the air release area of the air release hole 121 is directly opposite to the opening area of the part of the air release hole 121, so that when the reliability test is performed in the high-temperature and high-humidity environment, the frequency response performance (FR) of the sound generating device 100 is equivalent to the frequency response performance (FR) of the existing tweeter in the normal environment, and therefore, the stability of the frequency response performance of the sound generating device 100 in the high-temperature and high-humidity environment is ensured.

The invention also provides electronic equipment, which comprises an equipment shell and the sounding device 100, wherein the sounding device 100 is arranged in the equipment shell. 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.

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

Claims

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

a housing, the housing having a mounting cavity;

The magnetic circuit system is arranged in the mounting cavity;

the shell is provided with a plastic part, the plastic part is provided with a gas leakage hole communicated with the rear acoustic cavity, part of the plastic part and/or part of the magnetic circuit system is formed into a stop part, and the stop part is controlled and adjusted to cover part of the gas leakage hole, so that the stop part is opposite to part of the opening area of the gas leakage hole to adjust the gas leakage area of the gas leakage hole.

2. The sound generating apparatus according to claim 1, wherein an air passage is formed between the magnetic circuit system and the inner wall of the housing at an interval, and the air flow of the rear sound chamber is circulated to the air release hole through the air passage.

3. The sound generating apparatus according to claim 2, wherein the air release hole comprises a first section and a second section, the first section is disposed through the plastic part and corresponds to the air channel, and the second section is disposed concavely on a side of the plastic part facing the air channel and corresponds to the first section, so that the plastic part corresponding to the first section forms the stop portion.

4. The sound generating apparatus according to claim 2, wherein the housing comprises a first shell, the first shell comprises a bottom and a side part arranged at the periphery of the bottom, the bottom and the side part enclose to form a first mounting groove, at least part of the bottom is formed by the plastic part, and the air leakage hole is arranged at the bottom and is correspondingly communicated with the air channel;

5. The sound emitting device of claim 4, wherein the first housing comprises an integrally injection molded plastic portion and a metal piece, the metal piece comprising a bottom plate and a side plate connected to the bottom plate, the plastic portion being disposed on a periphery of the bottom plate and connected to the side plate, the plastic portion cooperating with the side plate to form the side portion, the plastic portion being provided with a tab extending toward the bottom plate such that the tab cooperates with the bottom plate to form the bottom portion, the vent opening being disposed in the tab.

6. The sound emitting apparatus of claim 4 wherein a portion of the first magnetic circuit portion covers a portion of the vent aperture such that a portion of the first magnetic circuit portion facing the vent aperture area forms the stop.

7. The sound emitting apparatus of claim 4 wherein the housing comprises a second shell provided with a second mounting groove, the second shell being connected to the first shell such that the second mounting groove and the first mounting groove enclose the mounting cavity;

8. The sound generating apparatus according to claim 7, wherein the second housing includes a central portion and an edge portion provided on an outer periphery of the central portion, the edge portion and the central portion enclosing to form the second mounting groove, the edge portion being bent and extended with respect to the central portion in a direction away from the second magnetic circuit portion to define a glue coating groove with the side portion, the glue coating groove being filled with sealing glue.

9. The sound emitting device of any one of claims 1-8, wherein the venting aperture has a venting area of less than or equal to 0.02mm;

10. An electronic device comprising a device housing and a sound emitting apparatus according to any one of claims 1 to 9, the sound emitting apparatus being provided within the device housing.