CN220586453U - Sound producing device and electronic equipment - Google Patents

Abstract

The utility model discloses a sound generating device and electronic equipment, the sound generating device comprises a shell component, a vibration system and a waterproof and breathable film, the shell component comprises a middle shell and a rear shell, one side of the middle shell is connected with the rear shell, the middle shell is provided with a first channel, the rear shell is provided with a second channel, the first channel is communicated with the second channel to form a pressure relief channel, the vibration system comprises a vibrating diaphragm component, the outer periphery of the vibrating diaphragm component is connected with the middle shell, the two opposite sides of the vibrating diaphragm component are provided with a first space and a second space, the first space is communicated with the second space through the pressure relief channel, and the waterproof and breathable film is arranged between the middle shell and the rear shell and covers the flow section of the pressure relief channel. The utility model aims to provide the sound generating device which has high structural firmness, can realize pressure relief and does not influence the appearance, and the sound generating device is applied to electronic equipment, so that the acoustic performance of the sound generating device is effectively improved, and the waterproof performance of the sound generating device is improved.

Description

Sound producing device and electronic equipment

Technical Field

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

Background

Along with the rapid development of technology, people have higher and higher requirements on the sound quality of electronic equipment, the requirements on the electronic equipment are not limited to the playing of video and audio, and higher requirements on the sound quality and reliability of the playing sound of the electronic equipment are further provided. Smartwatches are widely used as a relatively common portable electronic device.

In the related art, most intelligent wearing equipment all requires to have waterproof performance, in order to keep the inside atmospheric pressure balance of intelligent wearing equipment, does not influence sound production device's sound production performance, sets up the atmospheric pressure equalizing hole on intelligent wearing equipment's shell generally, pastes waterproof ventilated membrane in atmospheric pressure equalizing hole department, so set up not only makes intelligent wearing equipment's shell processing become comparatively complicated, also influences the outward appearance of shell. Moreover, the waterproof breathable film is very easy to fall off, so that the waterproof effect of the intelligent wearing equipment is seriously affected.

Disclosure of Invention

The utility model aims to provide a sound generating device and electronic equipment, and aims to provide the sound generating device which is high in structural firmness, can realize pressure relief and does not influence the appearance.

In order to achieve the above object, the present utility model provides a sound generating apparatus, comprising:

The shell assembly comprises a middle shell and a rear shell, one side of the middle shell is connected with the rear shell, the middle shell is provided with a first channel, the rear shell is provided with a second channel, and the first channel is communicated with the second channel to form a pressure release channel;

the vibration system comprises a vibrating diaphragm assembly, the outer periphery of the vibrating diaphragm assembly is connected with the middle shell, a first space and a second space are formed in two opposite sides of the vibrating diaphragm assembly, and the first space and the second space are communicated through the pressure relief channel; and

The waterproof breathable film is arranged between the middle shell and the rear shell and covers the flow section of the pressure relief channel.

In an embodiment, a first boss extending towards the rear shell is arranged on one side of the middle shell towards the rear shell, the first channel penetrates through the bottom wall of the first boss, a first groove is arranged on one side of the rear shell facing the middle shell, the second channel penetrates through the bottom wall of the first groove, at least part of the first boss is accommodated in the first groove, and the waterproof breathable film is attached to the bottom wall of the first boss or the bottom wall of the first groove.

In an embodiment, the waterproof and breathable film is sandwiched between the first boss and the first groove.

In an embodiment, a second boss extending towards the middle shell is arranged on one side of the rear shell towards the middle shell, the second channel penetrates through the bottom wall of the second boss, a second groove is arranged on one side of the middle shell facing the rear shell, the first channel penetrates through the bottom wall of the second groove, at least part of the second boss is accommodated in the second groove, and the waterproof breathable film is attached to the bottom wall of the second boss or the bottom wall of the second groove.

In an embodiment, the waterproof and breathable film is sandwiched between the second boss and the second groove.

In an embodiment, the rear shell comprises a main shell part and a protruding part protruding from the periphery of the main shell part, and the thickness of the protruding part along the vibration direction of the vibration system is smaller than that of the main shell part along the vibration direction of the vibration system;

the protrusion is provided with the second channel corresponding to the first channel, the periphery of the protrusion is also provided with a notch communicated with the second channel, and the notch penetrates through one side of the protrusion, which is opposite to the middle shell.

In an embodiment, the first channel includes a first extension section and a second extension section that are communicated, where an end of the first extension section away from the second extension section is communicated with the first space, and the first extension section extends along a vibration direction of the vibration system, an end of the second extension section away from the first extension section is communicated with the second channel, and an extension direction of the second extension section is the same as or an included angle with an extension direction of the first extension section;

or, the first channel includes first extension section, intercommunication section and the second extension section that is linked together, the intercommunication of intercommunication section first extension section with the second extension section, first extension section with the second extension section is all followed vibration system's vibration direction extends, the extension direction of intercommunication section with first extension section with the extension direction of second extension section is the contained angle setting.

In an embodiment, the extending direction of the second channel is the same as the extending direction of the second extending section;

or, the extending direction of the second channel and the extending direction of the second extending section form an included angle;

or, the second channel and the second extension section are coaxially arranged;

Or, in the vibration direction of the vibration system, the second extension section extends obliquely toward a direction away from the vibration system and communicates with the second passage.

In one embodiment, the middle shell comprises a first structure part and a second structure part which are distributed in sequence along the vibration direction of the vibration system, the first extension section is arranged on the first structure part, the second extension section is arranged on the second structure part, at least part of the second structure part extends towards the direction away from the vibrating diaphragm assembly relative to the first structure part,

the first extension section is positioned at the middle position of the first structural part along a first direction perpendicular to the vibration direction of the vibration system;

and/or, along a first direction perpendicular to the vibration direction of the vibration system, the second extension section is located at a middle position of the second structure part.

In an embodiment, the housing assembly further includes a front shell, the front shell is disposed on a side of the middle shell away from the rear shell, the front shell and the diaphragm assembly cooperate to define the first space, the first space is a front acoustic cavity, and the middle shell is provided with a mounting surface opposite to the front shell;

The mounting surface is ultrasonically welded with the front shell; or the mounting surface is glued and sealed with the inner wall of the front shell.

In an embodiment, the second space comprises an inner space of the sound emitting device and/or an outer space of the sound emitting device.

In an embodiment, the diaphragm assembly comprises a diaphragm and a vibrating plate, and the diaphragm, the vibrating plate and the middle shell are integrally injection molded.

The utility model also provides electronic equipment comprising the sounding device.

According to the sound production device, the shell assembly is arranged to be the middle shell and the rear shell, the rear shell is connected to one side of the middle shell, the middle shell is utilized to install the vibrating membrane assembly for fixing the vibrating system, the outer periphery of the vibrating membrane assembly is connected with the middle shell, the two opposite sides of the vibrating membrane assembly are provided with the first space and the second space, the first channel is arranged in the middle shell, the rear shell is provided with the second channel, the first channel is communicated with the second channel to form the pressure relief channel, the pressure relief channel is communicated with the first space, the second channel is communicated with the pressure relief channel and the second space, so that partial air flow or air pressure of the first space is guided to the second space through the first channel and the second channel by utilizing the pressure relief channel formed on the middle shell and the rear shell, pressure relief is achieved, the vibrating membrane assembly of the vibrating system is prevented from being subjected to excessive pressure in the first space, normal vibration of the vibrating membrane assembly is influenced, and the acoustic performance of the sound production device can be effectively achieved; meanwhile, the waterproof breathable film is arranged between the middle shell and the rear shell, and the waterproof breathable film is used for covering the flow section of the pressure release channel, so that the waterproof performance of the sound production device can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model 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 utility model, 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 an exploded view of a sound generating apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a sound generating apparatus according to an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is a schematic diagram of a structure of the front and middle shells connected to the diaphragm assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram showing a structure of a middle case and a diaphragm assembly according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a rear case according to an embodiment of the present utility model.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model 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 utility model 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 utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model 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 utility model.

The utility model provides a sound generating device 100. It is understood that the sound generating apparatus 100 is applied to an electronic device, which may be a smart watch, a mobile phone, a sound device, a computer, an earphone, a television, or the like, and is not limited herein.

In this embodiment, a smart watch is taken as an example for explanation. It can be appreciated that by arranging the pressure release channel 14 on the sound generating device 100, so that the sound generating device 100 is installed in the electronic device, the pressure release channel 14 can be utilized to maintain the air pressure between the sound generating device 100 and/or the sound cavity in the electronic device in an equilibrium state, so that the vibration amplitude of the vibration film is reduced due to the expansion and extrusion of the air in the sound cavity, the vibration quantity of the vibration film is ensured, and the acoustic performance of the sound generating device 100 is improved; meanwhile, the pressure release channel 14 is completely covered by the waterproof and breathable film 5, so that the waterproof performance of the sound production device 100 can be improved, the connection firmness between the waterproof and breathable film 5 and the shell assembly 1 can be improved, and the problem that the waterproof and breathable film 5 is easy to fall off can be effectively solved.

Referring to fig. 1 to 6 in combination, in an embodiment of the utility model, the sound generating apparatus 100 includes a housing assembly 1, a vibration system 2 and a waterproof and breathable membrane 5, wherein the housing assembly 1 includes a middle shell 12 and a rear shell 13, one side of the middle shell 12 is connected with the rear shell 13, the middle shell 12 is provided with a first channel 121, the rear shell 13 is provided with a second channel 131, the first channel 121 is communicated with the second channel 131 to form a pressure release channel 14, the vibration system 2 includes a vibration membrane assembly 21, an outer periphery of the vibration membrane assembly 21 is connected with the middle shell 12, two opposite sides of the vibration membrane assembly 21 have a first space and a second space, the first space and the second space are communicated through the pressure release channel 14, and the waterproof and breathable membrane 5 is disposed between the middle shell 12 and the rear shell 13 and covers a flow section of the pressure release channel 14.

In this embodiment, the housing assembly 1 of the sound generating device 100 is used for mounting, fixing and supporting the components such as the vibration system 2 and the waterproof and breathable membrane 5, that is, the housing assembly 1 provides a mounting base for the components such as the vibration system 2 and the waterproof and breathable membrane 5. It will be appreciated that the housing assembly 1 may be a unitary structure or may be formed by a plurality of separate structures, and is not limited herein. The housing assembly 1 in this embodiment includes at least two structures of a middle case 12 and a rear case 13, and the rear case 13 may be connected to one side of the middle case 12 by ultrasonic welding, bonding, or the like.

It will be appreciated 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 assembly 1. It should be noted that, the housing assembly 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 vibration system 2, the waterproof and breathable film 5, and other components of the sound generating apparatus 100 are integrated into a whole structure by using the housing assembly 1, so as to facilitate disassembly and assembly. Of course, the housing assembly 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.

In this embodiment, the sound generating device 100 may be a sound generating unit structure, and the housing assembly 1 is used for accommodating and fixing the structures such as the vibration system 2 and the magnetic circuit system 3, so that the sound generating device 100 can be used as a separate component in an electronic device or a sound generating module, which is not limited herein. Of course, in other embodiments, the sound generating device 100 may be a module structure, and in this case, the structures such as the vibration system 2 and the magnetic circuit system 3 of the sound generating unit are respectively mounted as a plurality of independent components on the housing assembly 1 of the module structure, which is not limited herein.

It will be appreciated that by providing the housing assembly 1 as the middle case 12 and the rear case 13 such that the rear case 13 is connected to one side of the middle case 12, the housing assembly 1 is made to form an installation space, so that the vibration system 2 and the magnetic circuit system 3 can be conveniently installed and fixed using the installation space. In this embodiment, the outer periphery of the diaphragm assembly 21 in the vibration system 2 is connected to the middle shell 12, so that the opposite sides of the diaphragm assembly 21 have a first space and a second space, and the magnetic circuit system 3 is connected to the rear shell 13, and is opposite to and spaced from the diaphragm assembly 21 to form a vibration space in cooperation.

The second space may include an inner space located inside the sound generating device 100 and/or an outer space located outside the housing assembly 1 of the sound generating device 100, where the vibration space is the inner space located inside the sound generating device 100.

It can be understood that, when the sound generating device 100 is installed in the housing or the case of the electronic apparatus, in order to maintain the air pressure balance in the vibration space, the magnetic circuit system 3 or the rear housing 13 or the magnetic circuit system 3 and the rear housing 13 cooperate to form a venting hole communicating with the vibration space. The sound generating device 100 and the shell or the box body of the electronic device enclose to form a rear cavity, the rear cavity is an external space positioned outside the sound generating device 100, and the rear cavity is communicated with the vibration space of the sound generating device 100 through the air leakage hole. The rear chamber (i.e., the external space located outside the sound emitting device 100) and the vibration space (i.e., the internal space located inside the sound emitting device 100) may form a second space at this time.

Of course, in other embodiments, the second space may also only include an inner space located inside the sound generating device 100, that is, a vibration space, where the vibration space communicates with the first space through the pressure relief channel 14, so as to keep the air pressure on both sides of the diaphragm assembly 21 balanced. Alternatively, the second space may only include an external space located outside the sound generating device 100, that is, the aforementioned rear cavity, and the rear cavity is communicated with the first space through the pressure relief channel 14, so as to keep the air pressure at two sides of the diaphragm assembly 21 balanced, which is not limited herein.

In this embodiment, the first channel 121 is disposed on the middle shell 12, the second channel 131 is disposed on the rear shell 13, so that the first channel 121 and the second channel 131 are communicated to form the pressure release channel 14, the pressure release channel 14 and the first space are communicated by the first channel 121, the second channel 131 is communicated with the pressure release channel 14 and the second space, so that the sound generating device 100 is disposed in the housing or the box of the electronic device, the second channel 131 can be communicated with the pressure release channel 14 and the second space, at this time, the pressure release channel 14 on the middle shell 12 and the rear shell 13 can guide the air flow or the air pressure of the first space to the second space through the pressure release channel 14 formed by the first channel 121 and the second channel 131, so that the air pressure at two sides of the diaphragm assembly 21 is balanced, the pressure release channel 14 on the middle shell 12 and the rear shell 13 is utilized to realize the air flow co-communication between the second space and the first space, and the additional arrangement of the pressure release hole and other structures on the housing or the box of the electronic device are effectively avoided, and the vibration amplitude and vibration quantity of the diaphragm assembly 21 can also be ensured, thereby the acoustic performance of the sound generating device 100 is effectively ensured.

The first channel 121 of the middle case 12 includes a first air hole communicating with the first space and a second air hole corresponding to the second channel 131, and the second channel 131 of the rear case 13 includes a third air hole corresponding to the second air hole of the first channel 121 and a fourth air hole corresponding to the second space. In this embodiment, the air flow or air pressure in the first space can be guided to the first channel 121 through the first air hole of the middle shell 12, and enter the second channel 131 through the second air hole and the third air hole, and finally be guided to the second space through the fourth air hole, so that the air pressures at two sides of the diaphragm assembly 21 are kept balanced through the pressure release channels 14 formed by matching the middle shell 12 and the rear shell 13, and the second space air flow and the first space air flow can be commonly realized by utilizing the pressure release channels 14 formed by matching the middle shell 12 and the rear shell 13, so that the structures such as pressure release holes are additionally arranged on the casing or the box body of the electronic device can be effectively avoided, and the amplitude and the vibration quantity of the diaphragm assembly 21 can be ensured, thereby the acoustic performance of the sound generating device 100 can be effectively ensured.

It can be appreciated that, in order to further improve the waterproof performance of the sound generating apparatus 100, the waterproof and breathable film 5 is provided, so that the waterproof and breathable film 5 covers the flow section of the pressure release channel 14, that is, the waterproof and breathable film 5 can cover the first channel 121 or the second channel 131, thereby realizing the waterproof function while realizing ventilation by using the waterproof and breathable film 5. In the present embodiment, the waterproof and breathable film 5 may be a waterproof and breathable separator or the like, and is not limited thereto as long as it can achieve a breathable and waterproof function.

According to the sound production device 100, the shell assembly 1 is arranged as the middle shell 12 and the rear shell 13, the rear shell 13 is connected to one side of the middle shell 12, the middle shell 12 is utilized to install the vibrating membrane assembly 21 for fixing the vibrating system 2, the outer periphery of the vibrating membrane assembly 21 is connected with the middle shell 12, the two opposite sides of the vibrating membrane assembly 21 are provided with the first space and the second space, the middle shell 12 is provided with the first channel 121, the rear shell 13 is provided with the second channel 131, the first channel 121 is communicated with the second channel 131 to form the pressure relief channel 14, the pressure relief channel 14 is communicated with the first space through the first channel 121, the second channel 131 is communicated with the pressure relief channel 14 and the second space, so that partial air flow or air pressure of the first space can be guided to the second space through the first channel 121 and the second channel 131 through the pressure relief channel 14, the vibrating membrane assembly 21 of the vibrating system 2 is prevented from being subjected to excessive pressure in the first space, and the amplitude and vibration quantity of the vibrating assembly 21 are influenced, and the acoustic performance of the sound production device 100 can be effectively realized; meanwhile, by providing the waterproof and breathable film 5 and disposing the waterproof and breathable film 5 between the middle case 12 and the rear case 13, the flow cross section of the pressure release passage 14 is covered with the waterproof and breathable film 5, so that the waterproof performance of the sound generating apparatus 100 can be increased. In addition, the waterproof and breathable film 5 is arranged between the middle shell 12 and the rear shell 13, so that the connection firmness between the waterproof and breathable film 5 and the shell assembly 1 can be improved, and the problem that the waterproof and breathable film 5 is easy to fall off can be effectively solved.

In one embodiment, a waterproof and breathable membrane 5 is provided between the middle and rear shells 12 and 13 to cover the flow cross section of the first or second channels 121 or 131. It can be appreciated that the connection firmness between the waterproof and breathable film 5 and the shell component 1 can be improved, and the problem that the waterproof and breathable film 5 is easy to fall off can be effectively solved.

In this embodiment, as shown in fig. 2 and 3, by sandwiching the waterproof and breathable film 5 between the middle shell 12 and the rear shell 13, the waterproof and breathable film 5 can be used to cover the second air hole of the first channel 121, so that after water vapor and the like enter the first channel 121 through the front acoustic cavity 4, the water vapor enters the second space through the connection part between the middle shell 12 and the rear shell 13, and the waterproof and breathable film 5 can be clamped by the middle shell 12 and the rear shell 13, so that the installation stability of the waterproof and breathable film 5 is improved, and the waterproof performance is improved.

It will be appreciated that the waterproof and breathable membrane 5 is provided between the middle and rear shells 12, 13, i.e. the waterproof and breathable membrane 5 is located between the first and second channels 121, 131 and completely covers the second and third air holes of the first and second channels 121, 131, i.e. the flow cross section of the pressure relief channel 14.

In order to achieve positioning and spacing installation of the waterproof and breathable membrane 5 and to avoid that the waterproof and breathable membrane 5 affects the connection stability of the middle shell 12 and the rear shell 13, in an embodiment, a side of the middle shell 12 facing the rear shell 13 is provided with a first boss extending towards the rear shell 13, a first channel 121 penetrates a bottom wall of the first boss, a side of the rear shell 13 facing the middle shell 12 is provided with a first groove 125, a second channel 131 penetrates a bottom wall of the first groove 125, at least part of the first boss is accommodated in the first groove 125, and the waterproof and breathable membrane 5 is attached to the bottom wall of the first boss or the bottom wall of the first groove 125. Optionally, the waterproof breathable membrane 5 is sandwiched between the first boss and the first groove 125.

Of course, in another embodiment, a second boss extending toward the middle shell 12 is provided on a side of the rear shell 13 facing the middle shell 12, the second channel 131 penetrates a bottom wall of the second boss, the second groove 132 is provided on a side of the middle shell 12 facing the rear shell 13, the first channel 121 penetrates a bottom wall of the second groove 132, at least a portion of the second boss is accommodated in the second groove 132, and the waterproof and breathable membrane 5 is attached to the bottom wall of the second boss or the bottom wall of the second groove 132. Optionally, the waterproof and breathable membrane 5 is sandwiched between the second boss and the second groove 132.

The side of the middle shell 12 facing the rear shell 13 is provided with a first groove 125, the first channel 121 penetrates through the bottom wall of the first groove 125, and the waterproof and breathable film 5 is accommodated and limited in the first groove 125. It will be appreciated that the first recess 125 may be concave in the side of the middle housing 12 facing the rear housing 13.

Of course, a second groove 132 may be provided on the side of the rear case 13 facing the middle case 12, and the second passage 131 penetrates the bottom wall of the second groove 132, and the waterproof and breathable film 5 is accommodated and confined in the second groove 132. It will be appreciated that the second recess 132 may be recessed in the side of the rear housing 13 facing the middle housing 12.

To further improve the sealing effect, in one embodiment, an adhesive layer is provided between the waterproof and breathable film 5 and the middle case 12, and the adhesive layer is provided with ventilation holes, which are correspondingly communicated with the first channel 121. Of course, in other embodiments, an adhesive layer is provided between the waterproof breathable film 5 and the rear case 13, and the adhesive layer is provided with ventilation holes, which are correspondingly communicated with the second channel 131. It can be appreciated that the middle shell 12 and/or the rear shell 13 are/is connected with the waterproof and breathable membrane 5 through an adhesive layer, and the adhesive layer is annularly arranged around the second air hole and/or the third air hole, so that the connection stability of the waterproof and breathable membrane 5 can be improved and the sealing performance can be improved through the adhesive layer.

In an embodiment, the rear case 13 includes a main case portion 133 and a protrusion portion 134 protruding from a periphery of the main case portion 133, and a thickness of the protrusion portion 134 in a vibration direction of the vibration system 2 is smaller than a thickness of the main case portion 133 in the vibration direction of the vibration system 2; the bulge 134 is provided with a second channel 131 corresponding to the first channel 121, the periphery of the bulge 134 is also provided with a notch 135 communicated with the second channel 131, and the notch 135 penetrates through one side of the bulge 134, which is away from the middle shell 12.

In the present embodiment, as shown in fig. 1, 2, 3 and 6, by providing the protrusion 134 to protrude at the circumferential side of the main shell portion 133 of the rear shell 13, it is convenient to provide the second passage 131 with the protrusion 134, and it is also possible to improve the connection strength and stability of the middle shell 12 and the rear shell 13. It will be appreciated that the side of the protruding portion 134 and the main casing portion 133 facing the middle casing 12 are disposed flush, and the side of the protruding portion 134 and the main casing portion 133 facing away from the middle casing 12 has a certain height difference, so that the height difference can be used to facilitate the gap 135 (i.e. the fourth air hole) and the second space, so as to ensure the air flow to be unobstructed.

It will be appreciated that the fourth air hole of the second channel 131 may be disposed on the outer side of the rear case 13 (i.e., the outer side of the protrusion 134) or on the side of the rear case 13 facing away from the middle case 12 (i.e., the side of the protrusion 134 facing away from the middle case 12). In order to keep the air flow between the notch 135 (i.e., the fourth air hole) and the second space smooth, an inclined surface is provided on the outer side of the rear case 13 (i.e., the outer side of the protrusion 134), and the notch 135 (i.e., the fourth air hole) is provided on the inclined surface, which extends obliquely toward the direction approaching or separating from the main case 133 of the rear case 13 in the vibration direction of the vibration system 2.

When the sound generating device 100 is mounted in the housing or case of the electronic apparatus, the inclined surface is formed on the outer wall of the rear case 13, so that a space for generating sound from the side surface is formed between the inclined surface and the housing or case of the electronic apparatus, thereby keeping the air flow between the notch 135 (i.e., the fourth air hole) and the second space unobstructed.

It will be appreciated that the inclined surface slopes from one end of the middle casing 12 to one end of the rear casing 13 facing away from the middle casing 12, toward gradually approaching the vibration system 2 or the vibration space, i.e., the thickness of the projection 134 gradually decreases from the middle casing 12 to the rear casing 13 facing away from the middle casing 12.

In an embodiment, the first channel 121 includes a first extension section 122 and a second extension section 123 that are connected, where an end of the first extension section 122 away from the second extension section 123 is connected to the first space, and the first extension section 122 extends along the vibration direction of the vibration system 2, and an end of the second extension section 123 away from the first extension section 122 is connected to the second channel 131, and an extension direction of the second extension section 123 is the same as or an included angle with an extension direction of the first extension section 122.

In this embodiment, the first channel 121 is configured as the first extension section 122 and the second extension section 123 that are connected, so that the extension direction of the second extension section 123 is set at an included angle with the extension direction of the first extension section 122, that is, the first channel 121 guides the first extension section 122 to be connected with the second channel 131 of the rear housing 13 through the second extension section 123, so that the structural strength of the middle housing 12 can be ensured, and the waterproof and breathable film 5 is conveniently set, so as to avoid the interference of the waterproof and breathable film 5 on the diaphragm assembly 21.

It will be appreciated that the first extension 122 of the first channel 121 may alternatively extend in the vibration direction of the vibration system 2, i.e. the first extension 122 extends from the side of the middle shell 12 adjacent to the front shell 11 towards the rear shell 13. The second extension 123 communicates with the first extension 122 and the second air hole.

In an embodiment, the second extension 123 extends obliquely in a direction away from the vibration system 2 along the vibration direction of the vibration system 2, and communicates with the second passage 131. It is understood that the extending direction of the second extending section 123 is inclined. Optionally, the extending direction of the second extending section 123 forms an included angle with the extending direction of the first extending section 122, which is larger than 0 ° and smaller than 180 °. It will be appreciated that to enhance the structural strength of the center housing 12, the second extension 123 is located between the first extension 122 and the second air hole away from the first air hole. Optionally, the extending direction of the second extending section 123 forms an included angle with the extending direction of the first extending section 122, which is greater than or equal to 90 ° and less than 180 °.

In another embodiment, as shown in fig. 2 and 3, the first channel 121 includes a first extending section 122, a communicating section 124 and a second extending section 123 that are connected, the communicating section 124 communicates the first extending section 122 and the second extending section 123, the first extending section 122 and the second extending section 123 extend along the vibration direction of the vibration system 2, and the extending direction of the communicating section 124 is set at an included angle with the extending direction of the first extending section 122 and the second extending section 123.

In this embodiment, the second extension section 123 is guided towards the outer side of the middle shell 12 by using the communication section 124, so that not only the structural strength of the middle shell 12 can be ensured, but also the waterproof and breathable film 5 is convenient to be arranged, so that the waterproof and breathable film 5 is prevented from interfering with the diaphragm assembly 21.

It is understood that the extending direction of the second channel 131 is the same as the extending direction of the second extension 123. Optionally, the second channel 131 is coaxially arranged with the second extension 123. Of course, in other embodiments, the extending direction of the second channel 131 is disposed at an angle to the extending direction of the second extending section 123.

In the present embodiment, the extending direction of the communication section 124 is optionally disposed perpendicular to the extending directions of the first extending section 122 and the second extending section 123. Of course, in other embodiments, the extending direction of the communication section 124 extends obliquely in the direction away from the vibration system 2 along the vibration direction of the vibration system 2, which is not limited herein.

In an embodiment, the middle shell 12 includes a first structural portion and a second structural portion sequentially distributed along the vibration direction of the vibration system 2, the first extension section 122 is disposed on the first structural portion, the second extension section 123 is disposed on the second structural portion, at least part of the second structural portion extends toward a direction away from the diaphragm assembly 21 relative to the first structural portion, and the first extension section 122 is located at an intermediate position of the first structural portion along a first direction perpendicular to the vibration direction of the vibration system 2; and/or, the second extension 123 is located at an intermediate position of the second structure portion in a first direction perpendicular to the vibration direction of the vibration system 2.

It can be appreciated that by arranging the middle casing 12 as the first structural portion and the second structural portion, the first structural portion and the second structural portion are sequentially distributed along the vibration direction of the vibration system 2, and at least part of the second structural portion extends towards a direction away from the diaphragm assembly 21 relative to the first structural portion, so that the first extension section 122 and the second extension section 123 of the first channel 121 can be conveniently arranged, and the structural strength of the middle casing 12 is ensured.

In the present embodiment, the first extension 122 is optionally located at a middle position of the first structural portion along the first direction perpendicular to the vibration direction of the vibration system 2, and the second extension 123 is optionally located at a middle position of the second structural portion along the first direction perpendicular to the vibration direction of the vibration system 2, so that the structural strength of the middle case 12 can be ensured without affecting the connection of the connection portion with the diaphragm assembly 21. At the same time, it is convenient for the middle case 12 to provide a sufficient installation space for the waterproof breathable film 5.

In an embodiment, the housing assembly 1 further includes a front shell 11, the front shell 11 covers a side of the middle shell 12 away from the rear shell 13, the front shell 11 and the diaphragm assembly 21 cooperate to define a first space, the first space is the front acoustic cavity 4, and the middle shell 12 is provided with a mounting surface 126 opposite to the front shell 11; the mounting face 126 is ultrasonically welded to the front housing 11; or, the mounting surface 126 is glued and sealed to the inner wall of the front case 11.

In this embodiment, the mounting surface 126 is located on a side of the middle housing 12 facing away from the rear housing 13. I.e., the first air hole of the first channel 121 is provided in the mounting surface 126. Optionally, the first air hole is located at an intermediate position of the mounting surface 126.

In the present embodiment, as shown in fig. 1, 2, 3 and 5, the mounting surface 126 is provided with a bead extending toward the front case 11. It will be appreciated that by providing the mounting surface 126 with a weld bead extending in the direction of the front case 11, the weld bead is used to connect the front case 11, thereby improving the welding effect and achieving sealing. It will be appreciated that the weld bead of the center housing 12 is ultrasonically welded to the front housing 11. Of course, in other embodiments, the mounting surface 126 is adhesively sealed to the inner wall of the front housing 11.

It should be noted that, in order to ensure that the first air hole is in direct communication with the front acoustic cavity 4, the first air hole is located on a side of the welding rib or glue layer facing the diaphragm assembly 21. It will be appreciated that the weld bead or glue layer protrudes a certain height or distance from the mounting surface 126 in order to ensure that the first air hole is air-vented from the front acoustic chamber 4.

In the present embodiment, as shown in fig. 2, 3, 4 and 5, the middle case 12 includes a connection portion to which the diaphragm assembly 21 is connected, and the front case 11 is disposed opposite to the connection portion; a direction perpendicular to the vibration direction of the vibration system 2 is defined as a thickness direction of the connection portion, and the first air hole of the first passage 121 is located at an intermediate position in the thickness direction of the connection portion.

In the present embodiment, as shown in fig. 2, 3, 4 and 5, the inner side of the connecting portion of the middle case 12 is connected to the diaphragm assembly 21, and the outer side of the connecting portion forms the outer wall of the middle case 12. It will be understood that the thickness direction of the connection portion is defined as a direction perpendicular to the vibration direction of the vibration system 2, that is, the thickness direction of the connection portion is a direction from the inside to the outside of the connection portion.

It can be appreciated that the first air hole is arranged at the middle position of the connecting part in the thickness direction, so that the structural strength of the middle shell 12 is effectively improved, and the connection of the connecting part and the diaphragm assembly 21 is not affected. In the present embodiment, the front case 11 is connected to the periphery of the connection portion; or, the front shell 11 is connected to one side of the connecting portion, which is opposite to the rear shell 13, and the diaphragm assembly 21, the connecting portion and the front shell 11 are enclosed to form the front acoustic cavity 4, so that the first air hole can be conveniently and directly communicated with the front acoustic cavity 4.

In an embodiment, the second space may comprise an inner space and/or an outer space of the sound generating device 100. For example, the housing assembly 1 includes a front shell 11, a middle shell 12 and a rear shell 13, the front shell 11 and the rear shell 13 are respectively disposed on two opposite sides of the middle shell 12, the outer periphery of the diaphragm assembly 21 is in sealing connection with the middle shell 12, the diaphragm assembly 21 and the front shell 11 define a first space (front acoustic cavity), and one end of the pressure release channel 14 is communicated with the first space. The second space may include an inner space of the sound generating device 100, that is, the diaphragm assembly 21, the housing assembly 1, and the magnetic circuit system 3 may together define the second space, and the second space may also be an outer space of the sound generating device 100, which may, of course, also include both the inner space and the outer space of the sound generating device 100. Thus, when the pressure release channel 14 communicates the first space and the second space, the pressure release channel can play a role in balancing the air pressure difference between the spaces on two sides of the diaphragm assembly 21.

In an embodiment, the outer peripheral wall of the front case 11 is further provided with a sealing ring 111, and the sealing ring 111 is adhered to or integrally injection-molded with the front case 11.

In the present embodiment, as shown in fig. 1 to 5, by providing the sealing ring 111 on the outer peripheral wall of the front case 11, when the sound emitting device 100 is mounted in the housing or case of the electronic apparatus, the front case 11 of the sound emitting device 100 is hermetically connected to the housing or case of the electronic apparatus through the sealing ring 111. It will be appreciated that the sealing ring 111 may be integrally injection molded to the outer peripheral wall of the front housing 11. Of course, in other embodiments, the sealing ring 111 may be bonded to the front housing 11 in a sealing manner, which is not limited herein.

It should be noted that, the front shell 11 of the housing assembly 1 is further provided with an acoustic outlet communicated with the front acoustic cavity 4, so that the sound generated by the vibration of the diaphragm 211 of the diaphragm assembly 21 can be conveniently transmitted smoothly through the front acoustic cavity 4 and the acoustic outlet. It will be appreciated that when the sound generating apparatus 100 is installed in a housing or a casing of an electronic device, the front sound cavity 4 is communicated with a sound outlet pipe of the housing or the casing of the electronic device through a sound outlet.

In this embodiment, the sound generating device 100 is disposed in a housing or a case of an electronic device, the middle shell 12 is sandwiched between the diaphragm 211 and the front shell 11, the middle shell 12 and the diaphragm 211 form a front acoustic cavity 4, the rear shell 13, the middle shell 12, the diaphragm 211 and the magnetic circuit 3 cooperate to form a vibration space, and the rear shell 13, the middle shell 12, the magnetic circuit 3 and the housing or the case of the electronic device cooperate to form a rear cavity. Alternatively, the middle case 12 is connected with the front case 11 by ultrasonic welding or adhesive fixing.

In one embodiment, the diaphragm assembly 21 includes a diaphragm 211 and a diaphragm plate 212, and the diaphragm 211, the diaphragm plate 212 and the middle housing 12 are integrally injection molded.

In this embodiment, as shown in fig. 1 to 5, by providing the diaphragm assembly 21 and the middle shell 12 as an integrally formed structure, not only the connection strength between the diaphragm assembly 21 and the middle shell 12 can be improved, but also the sealing performance between the diaphragm assembly 21 and the middle shell 12 can be effectively ensured.

It will be appreciated that the diaphragm plate 212 of the diaphragm assembly 21 may alternatively be of flat plate-like configuration. The diaphragm 211 of the diaphragm assembly 21 has an inner connecting portion, a ring-folded portion surrounding the inner connecting portion, and an outer connecting portion surrounding the ring-folded portion, and the inner connecting portion of the diaphragm 211 and the diaphragm 212 may be integrally injection molded or bonded, which is not limited herein. The outer connecting portion of the diaphragm 211 and the connecting portion of the middle case 12 may be integrally injection molded or bonded, which is not limited herein.

In this embodiment, in order to further improve the connection stability between the middle shell 12 and the diaphragm 211, a positioning protrusion may be disposed on one of the outer connecting portion of the diaphragm 211 and the connecting portion of the middle shell 12, and a positioning groove may be disposed on the other of the outer connecting portion and the connecting portion of the diaphragm 211, so that the connection strength can be improved while positioning fit is achieved by using the matching structure of the positioning protrusion and the positioning groove.

Alternatively, the folded ring portion of the diaphragm 211 may be a convex or concave structure. In order to avoid interference of the folded ring portion of the diaphragm 211 with the front case 11 during vibration, and influence the vibration effect, in the present embodiment, as shown in fig. 1 to 5, the folded ring portion of the diaphragm 211 is formed to be recessed from the front case 11 side toward the rear case 13 side, which is not limited herein.

In an embodiment, the first channels 121 include a plurality of channels, the second channels 131 include a plurality of channels, and the first channels 121 and the second channels 131 are disposed in a one-to-one correspondence.

In this embodiment, the plurality of first channels 121 are disposed on the middle shell 12 at intervals, the plurality of second channels 131 are disposed on the rear shell 13 at intervals, the plurality of first channels 121 and the plurality of second channels 131 are disposed in one-to-one correspondence to form a plurality of pressure relief channels 14, and the plurality of pressure relief channels 14 are distributed at intervals. It is understood that the pressure relief channel 14 may be disposed on the major and/or minor axis sides of the sound emitting device 100.

It should be noted that, by providing the plurality of pressure relief channels 14, the air relief amount of the plurality of pressure relief channels 14 can be effectively ensured, so as to balance the pressure of the diaphragm 211 of the diaphragm assembly 21. It will be appreciated that the plurality of pressure relief channels 14 may be formed by a plurality of first channels 121 and a second channel 131 in cooperation; alternatively, the plurality of pressure relief channels 14 may be formed by a plurality of second channels 131 and a first channel 121, which are not limited herein.

In an embodiment, the first channels 121 include a plurality of first channels 121 spaced apart from each other and each communicating with the second channel 131, where the plurality of first channels 121 share one second channel 131, and the second channel 131 extends in a strip shape. Of course, in other embodiments, the second channels 131 include a plurality of second channels 131, and the plurality of second channels 131 are spaced apart and all communicated with the first channel 121, where the plurality of second channels 131 share one first channel 121, and the first channel 121 extends in a strip-shaped channel, which is not limited herein.

In this embodiment, the first channels 121 of the pressure relief channels 14 may be disposed in one-to-one correspondence with the first air holes. Of course, in other embodiments, the first channels 121 of the pressure relief channels 14 may also share a first air hole, and the first air hole is disposed in a strip shape, and one ends of the first channels 121 of the pressure relief channels 14 are all communicated with the first air hole, which is not limited herein. It is understood that the first channels 121 of the pressure relief channels 14 may be disposed in one-to-one correspondence with the second air holes. Of course, in other embodiments, the first channels 121 of the pressure relief channels 14 may share a second air hole, where the second air hole extends in a strip shape on a side of the middle shell 12 facing the rear shell 13, and one ends of the first channels 121 of the pressure relief channels 14 are all communicated with the second air hole, which is not limited herein.

Of course, the second channels 131 of the pressure relief channels 14 may be disposed in one-to-one correspondence with the third air holes. Of course, in other embodiments, the second channels 131 of the pressure relief channels 14 may share a third air hole, and the third air hole extends in a strip shape, and one ends of the second channels 131 of the pressure relief channels 14 are all communicated with the third air hole, which is not limited herein. It is understood that the second channels 131 of the pressure relief channels 14 may be disposed in one-to-one correspondence with the fourth air holes. Of course, in other embodiments, the second channels 131 of the pressure relief channels 14 may share a fourth air hole, where the fourth air hole extends in a strip shape on a side of the rear housing 13 facing away from the middle housing 12, and one ends of the second channels 131 of the pressure relief channels 14 are all communicated with the fourth air hole, which is not limited herein.

In one embodiment, the waterproof and breathable films 5 include a plurality of waterproof and breathable films 5 and a plurality of pressure release channels 14 are arranged in a one-to-one correspondence. It will be appreciated that each waterproof and breathable membrane 5 of the plurality of waterproof and breathable membranes 5 is disposed between each first channel 121 and each second channel 131 and completely covers the second air hole of each first channel 121 and the third air hole of each second channel 131.

In another embodiment, the waterproof and breathable membrane 5 is one, and the waterproof and breathable membrane 5 covers a plurality of pressure relief channels 14. It will be appreciated that the waterproof and breathable membrane 5 is disposed between the plurality of first channels 121 and the plurality of second channels 131 and completely covers the plurality of second air holes of the plurality of first channels 121 and the plurality of third air holes of the plurality of second channels 131.

It will be appreciated that the number of the pressure relief channels 14 may be set according to actual requirements, the number of the first channels 121 may be set according to the structure of the middle shell 12, and the number of the second channels 131 may be set according to the structure of the rear shell 13, which is not limited herein. Of course, the number of the waterproof and breathable films 5 is specifically selected and set according to actual needs, and is not limited herein.

The vibration system 2 includes a diaphragm 211 for vibrating and sounding, and a voice coil 22 located below the diaphragm 211 to drive the diaphragm 211 to vibrate and sound. The magnetic circuit system 3 is used for driving the vibration system 2 to vibrate and sound. In the present embodiment, as shown in fig. 1 and 2, the magnetic circuit 3 includes a yoke 32, a central magnetic circuit portion 33 and a side magnetic circuit portion 34, the yoke 32 is connected to the rear case 13, the central magnetic circuit portion 33 and the side magnetic circuit portion 34 are disposed on a side of the yoke 32 facing the diaphragm 211, and the side magnetic circuit portion 34 is located outside the central magnetic circuit portion 33 and cooperates with the central magnetic circuit portion 33 to form the magnetic gap 31.

In this embodiment, the voice coil 22 is suspended within the magnetic gap. Current is introduced into the voice coil 22, so that the voice coil 22 can drive the diaphragm 211 to vibrate under the action of the magnetic field in the magnetic gap 31 of the magnetic circuit system 3, and the diaphragm assembly 21 can vibrate and sound. It will be appreciated that, in order to avoid polarization or oscillation of the voice coil 22 during vibration, the vibration system 2 further includes a centering plate 23, one end of the centering plate 23 is connected to the voice coil 22, and the other end of the centering plate 23 is connected to the housing assembly 1.

It will be appreciated that the centering disc 23 may be disposed between the diaphragm assembly 21 and the voice coil 22; alternatively, the centering pad 23 may be disposed at an end of the voice coil 22 away from the diaphragm assembly 21. In this embodiment, the centering pads 23 may also be used to conduct external circuitry to the voice coil 22.

The utility model 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 this embodiment, the electronic device further includes a device housing, the device housing has a mounting cavity and a sound outlet channel communicating with the mounting cavity, the sound generating device 100 is disposed in the mounting cavity of the device housing, the front sound cavity 4 of the sound generating device 100 is communicated with the sound outlet channel, the sound generating device 100 and the device housing further enclose to form a rear sound cavity, and the second air hole (i.e. the notch 135) of the second channel 131 of the sound generating device 100 is communicated with the rear sound cavity.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, 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 utility model.

Claims (13)

1. A sound emitting device, comprising:

the shell assembly comprises a middle shell and a rear shell, one side of the middle shell is connected with the rear shell, the middle shell is provided with a first channel, the rear shell is provided with a second channel, and the first channel is communicated with the second channel to form a pressure release channel;

the vibration system comprises a vibrating diaphragm assembly, the outer periphery of the vibrating diaphragm assembly is connected with the middle shell, a first space and a second space are formed in two opposite sides of the vibrating diaphragm assembly, and the first space and the second space are communicated through the pressure relief channel; and

The waterproof breathable film is arranged between the middle shell and the rear shell and covers the flow section of the pressure relief channel.

2. The sound-producing device of claim 1, wherein a side of the middle case facing the rear case is provided with a first boss extending toward the rear case, the first passage penetrates through a bottom wall of the first boss, a side of the rear case facing the middle case is provided with a first groove, the second passage penetrates through a bottom wall of the first groove, at least a portion of the first boss is accommodated in the first groove, and the waterproof breathable film is attached to the bottom wall of the first boss or the bottom wall of the first groove.

3. The sound emitting device of claim 2, wherein the waterproof breathable membrane is sandwiched between the first boss and the first recess.

4. The sound-producing device of claim 1, wherein a side of the rear housing facing the middle housing is provided with a second boss extending toward the middle housing, the second passage penetrates through a bottom wall of the second boss, a side of the middle housing facing the rear housing is provided with a second groove, the first passage penetrates through a bottom wall of the second groove, at least a portion of the second boss is accommodated in the second groove, and the waterproof breathable film is attached to the bottom wall of the second boss or the bottom wall of the second groove.

5. The sound emitting apparatus of claim 4, wherein the waterproof breathable membrane is sandwiched between the second boss and the second recess.

6. The sound generating apparatus according to claim 1, wherein the rear case includes a main case portion and a protruding portion protruding from a periphery of the main case portion, and a thickness of the protruding portion in a vibration direction of the vibration system is smaller than a thickness of the main case portion in the vibration direction of the vibration system;

the protrusion is provided with the second channel corresponding to the first channel, the periphery of the protrusion is also provided with a notch communicated with the second channel, and the notch penetrates through one side of the protrusion, which is opposite to the middle shell.

7. The sound generating apparatus according to claim 1, wherein the first channel includes a first extension section and a second extension section that are communicated, an end of the first extension section away from the second extension section is communicated with the first space, the first extension section extends along a vibration direction of the vibration system, an end of the second extension section away from the first extension section is communicated with the second channel, and an extension direction of the second extension section is the same as or set at an angle to an extension direction of the first extension section;

or, the first channel includes first extension section, intercommunication section and the second extension section that is linked together, the intercommunication of intercommunication section first extension section with the second extension section, first extension section with the second extension section is all followed vibration system's vibration direction extends, the extension direction of intercommunication section with first extension section with the extension direction of second extension section is the contained angle setting.

8. The sound emitting device of claim 7, wherein the second channel extends in the same direction as the second extension;

or, the extending direction of the second channel and the extending direction of the second extending section form an included angle;

Or, the second channel and the second extension section are coaxially arranged;

or, in the vibration direction of the vibration system, the second extension section extends obliquely toward a direction away from the vibration system and communicates with the second passage.

9. The sound generating apparatus according to claim 7, wherein the middle case includes a first structure portion and a second structure portion sequentially arranged along a vibration direction of the vibration system, the first extension portion is provided to the first structure portion, the second extension portion is provided to the second structure portion, at least a portion of the second structure portion extends toward a direction away from the diaphragm assembly with respect to the first structure portion,

the first extension section is positioned at the middle position of the first structural part along a first direction perpendicular to the vibration direction of the vibration system;

and/or, along a first direction perpendicular to the vibration direction of the vibration system, the second extension section is located at a middle position of the second structure part.

10. The sound generating apparatus according to any one of claims 1 to 9, wherein the housing assembly further comprises a front shell, the front shell being provided on a side of the middle shell remote from the rear shell, the front shell and the diaphragm assembly cooperatively defining the first space, the first space being a front sound cavity, the middle shell being provided with a mounting surface disposed opposite to the front shell;

The mounting surface is ultrasonically welded with the front shell; or the mounting surface is glued and sealed with the inner wall of the front shell.

11. The sound emitting device of any one of claims 1-9, wherein the second space comprises an interior space of the sound emitting device and/or an exterior space of the sound emitting device.

12. The sound generating apparatus according to any of claims 1 to 9, wherein the diaphragm assembly comprises a diaphragm and a diaphragm plate, the diaphragm plate being integrally injection molded with the center housing.

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