Loudspeaker module and electronic device

Abstract

Embodiments of the present application relate to the technical field of electronic devices, and provide a loudspeaker module and an electronic device, which can prevent an electronic device from producing harsh sound when using a loudspeaker to produce sound, thereby improving the user experience. The electronic device comprises an overall shell and at least one loudspeaker, the overall shell is provided with an overall cavity, and the loudspeaker is located in the overall cavity; a sound outlet hole is formed on the overall shell; the loudspeaker comprises a loudspeaker core, a front cavity and a rear cavity, the front cavity is provided with a sound outlet channel, and the sound outlet channel is communicated with the sound outlet hole; the loudspeaker further comprises an auxiliary cavity, and at least part of the auxiliary cavity is located on the side of the front cavity facing away from the loudspeaker core; the auxiliary cavity comprises a transmission channel and a silencing cavity communicated with the transmission channel, the transmission channel is communicated with the front cavity by means of an auxiliary hole, and the auxiliary hole is covered with a damping structure.

Description

Speaker modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on July 31, 2023, with application number 202310956661.0 and application name “Speaker Module and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a speaker module and electronic equipment. Background Art

[0003] Speakers are used to convert audio electrical signals such as music and voice into sound. They can support the function of external audio playback and are widely used in electronic devices such as mobile phones, tablets, and laptops.

[0004] However, when an electronic device using a speaker uses the speaker to produce sound, it sometimes produces a harsh listening experience, affecting the user experience.

[0005] Summary of the Invention

[0006] In order to solve the above technical problems, the present application provides a speaker module and an electronic device, which can avoid the harsh listening experience when the electronic device uses the speaker to make sound, thereby improving the user experience.

[0007] In the first aspect, an embodiment of the present application provides an electronic device, which includes an entire housing and at least one speaker, the entire housing forms an entire cavity, and the speaker is located in the entire cavity; a sound outlet hole is provided on the entire housing; the speaker includes a speaker core, a front cavity and a rear cavity, the front cavity has a sound outlet channel, and the sound outlet channel is connected to the sound outlet hole; the speaker also includes an auxiliary cavity, at least part of the auxiliary cavity is located on the side of the front cavity away from the speaker core; the auxiliary cavity includes a transmission pipe and a silencer cavity connected to the transmission pipe, the transmission pipe is connected to the front cavity through the auxiliary hole, and the auxiliary hole is covered with a damping structure.

[0008] By setting at least part of the auxiliary cavity on the side of the front cavity away from the speaker core, the auxiliary cavity is connected to the front cavity through the auxiliary hole, and the auxiliary hole is covered with a damping structure. Compared with opening the auxiliary hole on the side wall of the front cavity of the speaker module, and the auxiliary cavity is located on one side of the front cavity, the electronic device provided in the embodiment of the present application can be provided with a damping structure on the auxiliary hole (if it is set on one side of the front cavity, the damping structure cannot be set) to increase damping, thereby improving the performance of the speaker; and compared with setting the auxiliary cavity in the accommodating cavity formed by the outer shell of the speaker module, in the embodiment of the present application, when the auxiliary cavity is located on the middle plate (such as the corresponding content of Figure 6 in the specific embodiment), or the auxiliary cavity is located in the rear cavity of the speaker, and the entire cavity serves as the rear cavity of the speaker (such as the corresponding content of Figure 13 in the specific embodiment), since the space of the auxiliary cavity is no longer limited to the volume of the accommodating cavity formed by the outer shell of the speaker module, the volume of the auxiliary cavity can also be increased, so that the effect of suppressing the high-frequency resonance peak is good.

[0009] When an auxiliary hole is opened on the side wall of the front cavity of the speaker module, and the auxiliary cavity is located on one side of the front cavity, a damping structure cannot be set on the auxiliary hole because: if a damping structure, such as a mesh, is attached around the auxiliary hole, in order to ensure the fitting effect of the mesh, the mesh and the side wall of the front cavity need to have a large fitting area, and in order to ensure the damping effect of the damping structure, it is necessary to fit all sides. In this way, the height of the side wall of the front cavity (the dimension in the Z-axis direction in the embodiment) is required to be large. However, when the height of the side wall of the front cavity is large, it is not conducive to the lightweight design of the electronic device, and the volume of the front cavity will increase accordingly, causing the high-frequency resonance peak of the speaker to move forward (move in the low-frequency direction), affecting the performance of the speaker. Therefore, when an auxiliary hole is opened on the side wall of the front cavity of the speaker module, and the auxiliary cavity is located on one side of the front cavity, a damping structure cannot be set on the auxiliary hole. If a damping structure is set, it will not only affect the performance of the speaker, but also go against the lightweight design of the electronic device.

[0010] In some possible implementations, the entire housing includes a middle frame and a display screen. The middle frame includes an appearance part and a middle plate. The middle plate is located inside the appearance part, and the appearance part is provided with a sound hole. The middle plate includes a first surface and a second surface opposite to each other. The second surface is located on the side of the first surface away from the speaker, and the display screen is located on the side of the second surface away from the first surface. The second surface of the middle plate is partially recessed to form a first groove. The first groove and the display screen form an auxiliary cavity, and an auxiliary hole is opened on the middle plate.

[0011] That is, the auxiliary cavity is formed by utilizing the original structure of the electronic device, which can suppress the high-frequency resonance peak without setting up a separate structure, and the structure is simple.

[0012] In some possible implementations, the gap between the speaker core and the first surface is the front cavity, and at least a portion of the entire speaker cavity except the front cavity is the rear cavity.

[0013] This arrangement can not only simplify the structure of the speaker, but also increase the volume of the rear cavity to achieve better audio effects, such as stereo sound.

[0014] In some possible implementations, the speaker further includes a front shell, and the front shell and the speaker core form a front cavity; a connecting hole is opened on the front shell, connecting the front cavity and the auxiliary hole, that is, the type of speaker can be flexibly selected.

[0015] Exemplarily, the speaker module also includes a rear shell, and the front shell and the rear shell form a accommodating cavity, and the speaker core is located in the accommodating cavity, so that the rear cavity of the speaker module is a sealed rear cavity. Of course, this does not constitute a limitation of the present application. The speaker module may also not include a rear shell, so that the rear cavity of the speaker can be an open rear cavity, that is, the entire cavity can be used as the rear cavity of the speaker to achieve better audio effects, such as stereo sound.

[0016] In some possible implementations, based on the above-mentioned speaker further including a front shell, the front shell and the speaker core forming a front cavity, the electronic device further includes an annular seal located between the front shell and the first surface and arranged around the periphery of the communicating hole.

[0017] The annular seal is provided to prevent sound from leaking at the gap between the front housing and the first surface.

[0018] In the second aspect, an embodiment of the present application provides a speaker module, which includes a speaker shell and a speaker core, the speaker module has a containing cavity, the speaker core divides the containing cavity into a front cavity and a rear cavity, the speaker shell includes a front shell, the front shell and the speaker core form a front cavity; the speaker module also includes an auxiliary cavity, at least part of the auxiliary cavity is located on the side of the front cavity away from the speaker core; the auxiliary cavity includes a transmission pipe and a silencer cavity communicated with the transmission pipe, the transmission pipe is communicated with the front cavity through an auxiliary hole, and the auxiliary hole is covered with a damping structure; the front shell includes a front wall and a side wall arranged around the edge of the front wall, the front wall includes a third surface and a fourth surface opposite to each other, the fourth surface is located on the side of the third surface away from the speaker core; the third surface of the front wall is partially recessed to form an auxiliary hole, and the fourth surface of the front wall is partially recessed to form a second groove; the speaker module also includes a sealing plate, the sealing plate covers the second groove to form a transmission pipe; the auxiliary hole connects the front cavity and the transmission pipe.

[0019] By disposing at least a portion of the auxiliary cavity on the side of the front cavity facing away from the speaker core, the auxiliary cavity communicates with the front cavity through an auxiliary hole, and the auxiliary hole is covered with a damping structure. Compared to providing an auxiliary hole in the side wall of the front cavity of the speaker module and disposing the auxiliary cavity on one side of the front cavity, the electronic device provided by the present application not only facilitates the installation of the damping structure (if it is located on one side of the front cavity, the damping structure cannot be installed), but also because the space of the auxiliary cavity is no longer limited to one side of the speaker front cavity, the volume of the auxiliary cavity can be increased, thus effectively suppressing high-frequency resonance peaks. In addition, the front shell is used to form a transmission conduit, eliminating the need for a separate transmission conduit.

[0020] For example, the rear cavity of the speaker module can be a closed rear cavity, or at least a portion of the entire device cavity can serve as the rear cavity of the speaker module. When at least a portion of the entire device cavity serves as the rear cavity of the speaker module, the auxiliary cavity can be provided with more space, which will improve the resonance suppression effect of the auxiliary cavity.

[0021] In some possible implementations, the fourth surface of the front wall is partially recessed to form a third recessed groove. The third recessed groove surrounds the second recessed groove and has a depth less than that of the second recessed groove. The sealing plate is located within the third recessed groove. This arrangement facilitates a slimmer and lighter design for the speaker module, and thus for the electronic device.

[0022] In some possible implementations, the speaker module is applied to an electronic device, which includes a complete housing, which forms a complete cavity around the entire machine. The speaker core and at least part of the complete cavity form a rear cavity, and the silencer cavity is located in the rear cavity. In this way, the setting space of the auxiliary cavity can be increased, and the effect of the auxiliary cavity in suppressing resonance is better.

[0023] In some possible implementations, the front housing includes a first portion and a second portion; the first portion and the speaker core form a front cavity; and the speaker module further includes a sound-absorbing cover, with the sound-absorbing cover and the second portion forming a sound-absorbing chamber. Specifically, the sound-absorbing chamber is formed by combining a portion of the front housing with the sound-absorbing cover. The sound-absorbing chamber has a simple structure and is formed using a simple manufacturing process.

[0024] In some possible implementations, the damping structure includes a mesh, etc., wherein the mesh includes, for example: The embodiment of the present application does not limit the type of the damping structure and the type of the mesh when the damping structure is a mesh.

[0025] In a third aspect, an embodiment of the present application further provides an electronic device, which is the electronic device of the first aspect; in addition, the electronic device also includes the speaker module of the second aspect.

[0026] The third aspect and any implementation of the third aspect correspond to the first aspect and any implementation of the first aspect, or correspond to the second aspect and any implementation of the second aspect, respectively. The technical effects corresponding to the third aspect and any implementation of the third aspect can refer to the technical effects corresponding to the first aspect and any implementation of the first aspect, as well as the technical effects corresponding to the second aspect and any implementation of the second aspect, and are not repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0028] FIG2 is an exploded view of the electronic device shown in FIG1 ;

[0029] FIG3 is a simplified structural diagram of a loudspeaker;

[0030] FIG4 is a comparison diagram of the relationship between frequency and loudness after simulation of a speaker without an auxiliary cavity and a speaker with an auxiliary cavity;

[0031] FIG5 is a schematic diagram of the back structure of an electronic device provided in an embodiment of the present application;

[0032] FIG6 is a schematic structural diagram of a middle frame provided in an embodiment of the present application;

[0033] FIG7 is a cross-sectional view of the electronic device shown in FIG5 along the AA' direction;

[0034] FIG8 is an enlarged view of the middle frame BB area shown in FIG6 ;

[0035] FIG9 is a cross-sectional view of the middle plate of FIG8 along the CC' direction;

[0036] FIG10 is a cross-sectional view of the electronic device shown in FIG5 along the DD' direction;

[0037] FIG11 is another cross-sectional view of the electronic device shown in FIG5 along the DD' direction;

[0038] FIG12 is a schematic diagram of the front structure of a speaker provided in an embodiment of the present application;

[0039] FIG13 is a schematic diagram of the back structure of a speaker provided in an embodiment of the present application;

[0040] FIG14 is a cross-sectional view of the electronic device shown in FIG1 along the EE' direction;

[0041] FIG15 is a schematic diagram of the front structure of a front housing provided by an embodiment of the present application without a sealing plate;

[0042] FIG16 is a schematic diagram of the back structure of a front housing provided with a damping structure according to an embodiment of the present application;

[0043] FIG17 is a schematic diagram of the back structure of a front housing provided by an embodiment of the present application without a damping structure;

[0044] FIG18 is a cross-sectional view of the loudspeaker shown in FIG13 along the FF' direction;

[0045] FIG19 is a comparison diagram of the relationship between frequency and loudness after simulation of a speaker in which the auxiliary cavity is disposed on one side of the front cavity and a speaker in which at least a portion of the auxiliary cavity is disposed on the upper side of the front cavity. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] The term "and / or" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0048] In the description and claims of the embodiments of this application, the terms "first" and "second" are used to distinguish different objects, rather than to describe a specific order of objects. For example, the terms "first target object" and "second target object" are used to distinguish different objects, rather than to describe a specific order of objects.

[0049] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0050] In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more. For example, "multiple processing units" means two or more processing units; "multiple systems" means two or more systems.

[0051] In order to better understand the embodiments of the present application, the types of speakers and corresponding structures mentioned in the embodiments of the present application are first briefly introduced.

[0052] There are generally two types of speakers: speaker modules and speaker units.

[0053] A speaker module generally includes a speaker housing and a speaker core. The speaker housing alone forms a housing cavity, or the speaker housing and other components of the electronic device cooperate to form a housing cavity. The speaker core is located within the housing cavity and divides the housing cavity into a front cavity and a rear cavity. For example, the speaker housing includes a front shell and a rear shell. The front shell is assembled on the rear shell to form a housing cavity. The speaker core divides the housing cavity enclosed by the speaker housing into a front cavity and a rear cavity. For another example, the speaker housing is a front shell. The front shell and the speaker core form a front cavity, and the entire cavity of the electronic device serves as the rear cavity of the speaker module. This allows for better audio effects, such as stereo sound, to be achieved within the limited architectural space of the electronic device.

[0054] For the speaker unit, it does not have an independent shell and only includes a speaker core. When it is set in the overall cavity of an electronic device, the gap between the speaker unit and the middle frame of the electronic device forms a front cavity, and the area of ​​the overall cavity of the electronic device except the front cavity forms a rear cavity.

[0055] The embodiments of the present application provide an electronic device. The electronic device provided in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA), an in-car computer, a television, a smart wearable device (such as a smart watch, a smart bracelet, a smart head-mounted display, smart glasses), a smart home device, or other electronic device including a speaker. The embodiments of the present application do not specifically limit the specific form of the above-mentioned electronic device. For the convenience of explanation, the following description takes the electronic device as an example.

[0056] Referring to Figures 1 and 2 , Figure 1 is a schematic diagram of the back structure of an electronic device provided in an embodiment of the present application, and Figure 2 is an exploded view of the electronic device shown in Figure 1 . As shown in Figures 1 and 2 , a mobile phone 100 includes a display module 10, a back cover (also called a battery cover) 20, a middle frame 30, a main board 40, a sub-board 50, a flexible printed circuit (FPC) 60 connecting the main board 40 and the sub-board 50, a battery 70, and at least one speaker 80, among other structures.

[0057] It should be understood that Figures 1 and 2 and the related figures below merely schematically illustrate some of the components of mobile phone 100, and the actual shape, size, location, and structure of these components are not limited by Figures 1 and 2 or the figures below. Furthermore, when the electronic device is of some other form factor, electronic device 100 may also not include at least one of the display module 10, back cover 20, sub-board 50, FPC 60, battery 70, etc.

[0058] In Figures 1 and 2, the mobile phone 100 is in the shape of a rectangular flat plate. In order to facilitate the clear description of the subsequent structural features and the positional relationship of the structural features, the positional relationship of the various structures in the mobile phone is specified in terms of the X-axis direction, the Y-axis direction, and the Z-axis direction, wherein the X-axis direction is the width direction of the mobile phone, the Y-axis direction is the length direction of the mobile phone, and the Z-axis direction is the thickness direction of the mobile phone. It is understandable that the coordinate system (i.e., the X-axis, Y-axis, and Z-axis) of the electronic device can be flexibly set according to actual needs and is not specifically limited here. In other optional embodiments, the shape of the electronic device can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc. Of course, the electronic device can also be a foldable electronic device, etc.

[0059] Continuing with Figures 1 and 2 , the display panel 10 includes a cover plate 11 and a display screen 12 stacked along the Z-axis. The cover plate 11 protects the display screen 12, for example. The display screen 12 includes, for example, a liquid crystal display (LCD), an organic light emitting diode (OLED) display, and an LED display. Examples of LED displays include micro-LED displays and mini-LED displays. The present embodiment does not limit the type of display screen 12.

[0060] Along the Z-axis, the back cover 20 is located on the side of the display screen 12 facing away from the cover plate 11. The back cover 20 can be made of, for example, opaque materials such as plastic, plain leather, and fiberglass, or can be made of translucent materials such as glass. The present embodiment does not limit the material of the back cover 20.

[0061] The middle frame 30 is located between the cover plate 11 and the back cover 20. It includes an exposed annular appearance member 31 and a middle plate 32 located within the annular appearance member 31 and between the display 12 and the back cover 20. The cover plate 11, the annular appearance member 31, and the back cover 20 form the entire device cavity.

[0062] It should be noted here that when the electronic device is a mobile phone 100, the cover plate 11, the annular appearance part 31 and the back cover 20 exposed to the outside constitute the entire housing of the electronic device, and the entire housing has an entire cavity; when the electronic device is a device of some other form, the structure exposed to the outside of the device is the entire housing, and the entire housing has an entire cavity.

[0063] Structures such as the display screen 12, main board 40, sub-board 50, FPC 60, battery 70, and speaker 80 are located in the cavity of the entire device, and some structures in the cavity of the entire device are supported by the middle plate 32. For example, the display module 10 is set on the middle plate 32 by means of adhesive, etc., and the display screen 12 and the like are supported by the middle plate 32. The following content will introduce the film layer relationship of the mobile phone 100 (as shown in Figure 7), which will not be repeated here.

[0064] Along the Y-axis direction, the main board 40 and the sub-board 50 are respectively arranged on both sides of the battery 70 , and the FPC 60 passes through the battery 70 to electrically connect the main board 40 and the sub-board 50 to realize the transmission of data and signals between the main board 40 and the sub-board 50 .

[0065] The motherboard 40 is integrated with a control chip. The control chip includes, for example, a system on chip (SoC) and an application processor (AP). The SoC may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), and a modem.

[0066] The sub-board 50 is integrated with an antenna radio frequency front end, a Universal Serial Bus (USB) device, and the like.

[0067] The battery 70 is used to supply power to components in the mobile phone 100 , such as the display screen 12 , components on the main board 40 , components on the sub-board 50 , and the speaker 80 , to ensure normal operation.

[0068] The speaker 80 is used to convert audio signals such as music and voice into sound, and can support the function of playing audio externally. At least one speaker 80, for example, includes at least one first speaker 81; or, at least one speaker 80, for example, includes at least one second speaker 82; or, at least one speaker 80, for example, includes at least one first speaker 81 and at least one second speaker 82, wherein the first speaker 81 is, for example, a speaker arranged adjacent to the main board 40, and the first speaker 81 is, for example, a speaker unit or a speaker module, and the second speaker 82 is, for example, a speaker arranged adjacent to the sub-board 50, and the second speaker 82 is, for example, a speaker unit or a speaker module. The embodiment of the present application is described by taking the example of at least one speaker 80 including at least one first speaker 81 and at least one second speaker 82.

[0069] The first speaker 81 is a speaker arranged adjacent to the main board 40, that is, along the Y-axis direction, the first speaker 81 is located on the side of the battery 70 away from the sub-board 50, and is electrically connected to the main board 40. The second speaker 82 is a speaker arranged adjacent to the sub-board 50, that is, the second speaker 82 is located on the side of the battery 70 away from the main board 40, and is electrically connected to the sub-board 50. The actual setting positions of the first speaker 81 and the second speaker 82 are similar to those in the relevant prior art. For details, please refer to the relevant prior art and will not be described in detail in the embodiments of the present application. The main board 40 sends the audio signal to the first speaker 81 electrically connected thereto and transmits it to the second speaker 82 via the FPC 60 and the sub-board 50, and the audio signal is converted into sound output by the first speaker 81 and the second speaker 82. Specifically, the speaker 80 has a sound outlet channel 800, that is, the first speaker 81 and the second speaker 82 both have a sound outlet channel 800. Correspondingly, the appearance part 31 of the middle frame 30 is provided with sound outlet holes 300, which are respectively connected to the sound outlet channel 800 of the first speaker 81 and the sound outlet channel 800 of the second speaker 82. The sounds from the first speaker 81 and the second speaker 82 are exported to the outside of the mobile phone 100 through the sound outlet holes 300 connected to their sound outlet channels 800 to be heard by the user.

[0070] As we know from the background art, when electronic devices use speakers to produce sound, they sometimes produce a rather harsh sound, affecting the user experience. Research has found that this is because the sound transmits from the sound outlet channel 800 to the sound outlet 300, causing the speaker to resonate in the front cavity, causing the speaker 80 to form a higher high-frequency resonance peak in certain frequency bands (areas where the human ear is more sensitive).

[0071] In order to suppress the high-frequency resonance peak and improve the sound effect of the speaker, see Figure 3, which is a simplified structural diagram of the speaker. As shown in Figure 3, the speaker 80 also includes an auxiliary cavity 83. Along the X-axis, the auxiliary cavity 83 is located on one side of the front cavity Q1 (formed by the front wall, side walls and the speaker core). A side wall hole 8641 is opened on the front cavity side wall 864 of the speaker 80. The auxiliary hole 8641 connects the auxiliary cavity 83 with the front cavity Q1. The high-frequency resonance peak energy of the front cavity Q1 is dispersed through the auxiliary cavity 83 to achieve the effect of suppressing the high-frequency resonance peak. However, after studying this structure, it was found that, see Figure 4, which is a comparison diagram of the frequency and loudness relationship of the speaker without an auxiliary cavity and the speaker with an auxiliary cavity (the auxiliary cavity is located on one side of the front cavity). In Figure 4, the horizontal axis is frequency (Frequency), the unit is Hertz (Hz), and the vertical axis is loudness (SPL), the unit is dB. As shown in Figure 4, when the speaker adopts the auxiliary cavity 83 shown in Figure 3, two small resonance peaks will appear after the single high-frequency resonance peak is suppressed, and since the auxiliary cavity 83 is located on one side of the front cavity Q1, the setting space of the auxiliary cavity 83 is limited, so that the volume of the auxiliary cavity 83 is small, and the loudness of the two small resonance peaks is still relatively large. That is, when the speaker adopts the auxiliary cavity 83 shown in Figure 3, the speaker has a poor effect in suppressing the high-frequency resonance peak, and as a result, the user can still hear a harsh sound when using an electronic device including the speaker, affecting the user experience.

[0072] In view of this, an embodiment of the present application provides a speaker, in which at least part of the auxiliary cavity is arranged on the side of the front cavity away from the speaker core, the auxiliary cavity is connected to the front cavity through an auxiliary hole, and the auxiliary hole is covered with a damping structure. Compared with an auxiliary hole opened on the side wall of the front cavity of the speaker, and the auxiliary cavity is located on one side of the front cavity, a damping structure can be set on the auxiliary hole (if it is set on one side of the front cavity, the damping structure cannot be set) to increase damping, thereby improving the performance of the speaker; and compared with setting the auxiliary cavity in the accommodating cavity formed by the outer shell of the speaker module, in an embodiment of the present application, when the auxiliary cavity is located on the middle plate (such as the content corresponding to Figure 6 in the specific embodiment), or the auxiliary cavity is located in the rear cavity of the speaker, and the entire cavity serves as the rear cavity of the speaker (such as the content corresponding to Figure 13 in the specific embodiment), the space of the auxiliary cavity is no longer limited to the volume of the accommodating cavity formed by the outer shell of the speaker module. Therefore, the volume of the auxiliary cavity can also be increased, so that the effect of suppressing the high-frequency resonance peak is good.

[0073] When an auxiliary hole is opened on the side wall of the front cavity of the speaker module, and the auxiliary cavity is located on one side of the front cavity, a damping structure cannot be set on the auxiliary hole because: if a damping structure, such as a mesh, is attached around the auxiliary hole, in order to ensure the fitting effect of the mesh, the mesh and the side wall of the front cavity need to have a large fitting area, and in order to ensure the damping effect of the damping structure, it is necessary to fit all sides. In this way, the height of the side wall of the front cavity (the dimension in the Z-axis direction in the embodiment) is required to be large. However, when the height of the side wall of the front cavity is large, it is not conducive to the lightweight design of the electronic device, and the volume of the front cavity will increase accordingly, causing the high-frequency resonance peak of the speaker to move forward (move in the low-frequency direction), affecting the performance of the speaker. Therefore, when an auxiliary hole is opened on the side wall of the front cavity of the speaker module, and the auxiliary cavity is located on one side of the front cavity, a damping structure cannot be set on the auxiliary hole, which not only affects the performance of the speaker, but also contradicts the lightweight design of the electronic device.

[0074] The following describes the structure of a speaker in detail in conjunction with an electronic device. The following example is based on a mobile phone 100 having two speakers, for example, a first speaker 81 and a second speaker 82. Furthermore, unless otherwise specified, the following example is based on the first speaker 81 being a single speaker and the second speaker 82 being a speaker module. The following example does not constitute a limitation on the present application.

[0075] Referring to Figures 5-7, Figure 5 is a schematic diagram of the back structure of an electronic device provided in an embodiment of the present application, Figure 6 is a schematic diagram of the structure of a middle frame provided in an embodiment of the present application, and Figure 7 is a cross-sectional view of the electronic device shown in Figure 5 along the AA' direction. As shown in Figures 5-7, the first speaker 81 is a speaker unit, including a speaker core 84. Along the Z-axis, the middle plate 32 includes a first surface 321 and a second surface 322, which are opposite each other. The second surface 322 is located on the side of the first surface 321 facing away from the speaker core 84. The display 12 is located on the side of the second surface 322 facing away from the first surface 321. The display 12 is fixed to the second surface 322 of the middle plate 32, for example, using adhesive 13, and is supported by the middle plate 32. The gap between the speaker core 84 and the first surface 321 of the middle plate 32 defines the front cavity Q1 of the first speaker 81. At least a portion of the entire device cavity, excluding the front cavity Q1, defines the rear cavity Q2. This simplifies the speaker structure while increasing the volume of the rear cavity, achieving better audio effects, such as stereo sound.

[0076] It should be noted here that Figure 7 only exemplarily shows the position of the speaker core 84 and the middle plate 32 cooperating with the speaker core 84 to form the front cavity Q1 of the first speaker 81. In actual settings, the specific position of the speaker core 84 and the specific structure of the middle plate 32 cooperating with the speaker core 84 to form the front cavity Q1 of the first speaker 81 are similar to those in the existing technology. For details, please refer to the existing technology and will not be repeated here.

[0077] Referring to Figures 8 and 9, Figure 8 is an enlarged view of the middle frame BB area shown in Figure 6, and Figure 9 is a cross-sectional view of the middle plate of Figure 8 along the CC' direction. As shown in Figures 7-9, the second surface 322 of the middle plate 32 is partially recessed to form a first groove 3221. This first groove 3221, the display screen 12, and the adhesive backing 13 form an auxiliary cavity Q3. Auxiliary cavity Q3 includes a transmission conduit Q31 and a muffler cavity Q32 communicating with the transmission conduit Q31. The length of the transmission pipe Q31 is L, and the cross-sectional area is S1. The cross-sectional area of ​​the position where the silencer chamber Q32 is connected to the transmission pipe Q31 (i.e., the VV area) is S2, and S2 is greater than S1. The length of the transmission pipe Q31 is the dimension of the transmission pipe Q31 in the X-axis direction in Figure 8, the cross-sectional area of ​​the transmission pipe Q31 is the area of ​​the projection of the transmission pipe Q31 on the plane formed by the Y-axis and the Z-axis, and the cross-sectional area of ​​the position where the silencer chamber Q32 is connected to the transmission pipe Q31 is the area of ​​the projection of the plane formed by the Y-axis and the Z-axis at the position where the silencer chamber Q32 is connected to the transmission pipe Q31.

[0078] An auxiliary hole 323 is provided on the middle plate 32, and the transmission pipe Q31 is connected to the front cavity Q1 through the auxiliary hole 323. The auxiliary hole 323 is covered with a damping structure 85, and the damping structure 85 is in contact with the first surface 321, for example. The damping structure 85 includes, for example, a mesh, etc., wherein the mesh includes, for example, a breathable mesh or a dustproof net, etc. The embodiment of the present application does not limit the type of the damping structure 85 and the type of the mesh when the damping structure 85 is a mesh.

[0079] Specifically, a portion of the sound waves directed from the outside of the mobile phone 100 through the sound outlet 300 enters the auxiliary cavity Q3. When the sound waves of the preset frequency enter the auxiliary cavity Q3, they cannot be transmitted through the transmission pipe Q31 due to the small cross-sectional area of ​​the transmission pipe Q31. Therefore, they are reflected back and forth in the auxiliary cavity Q3 until they are almost consumed, thereby suppressing the resonance peak generated when the speaker is working. The preset frequency and the auxiliary cavity Q3 satisfy the following conditions:

[0080] f is the preset frequency, C0 is the speed of sound, and V is the volume of the muffler cavity Q32. By adjusting at least one of the length of the transmission conduit Q31, the cross-sectional area of ​​the transmission conduit Q31, and the volume of the muffler cavity Q32, the frequency of the sound wave to be eliminated (i.e., the preset frequency) is adjusted, i.e., the corresponding loudness value at this frequency is smaller. In this example, by disposing the auxiliary hole 323 on the middle plate 32 and directly above the front cavity Q1 along the Z-axis (i.e., on the side of the front cavity facing away from the speaker core), compared to disposing the auxiliary cavity Q3 to one side of the front cavity Q1, i.e., along the X-axis or Y-axis, the auxiliary cavity Q3 is located to the side of the front cavity Q1. This allows the auxiliary hole 323 to be covered with a damping structure 85. When the damping structure 85 is covered on the auxiliary hole 323, damping is increased. Moreover, since the auxiliary cavity Q3 is located on the middle plate 32, the space of the auxiliary cavity Q3 is no longer limited to the volume of the housing formed by the speaker module housing, thereby increasing the volume of the auxiliary cavity Q3. As the volume of auxiliary cavity Q3 increases, more sound waves are consumed, effectively suppressing the resonance peak, further improving the sound quality and, in turn, the user experience. Furthermore, because auxiliary cavity Q3 is formed by utilizing the existing structure of the electronic device, there is no need for a separate structure, resulting in a simpler structure.

[0081] It should be noted that the above example is an illustration of the first speaker 81 as a speaker unit, but does not constitute a limitation of the present application. In other optional embodiments of the present application, the first speaker 81 can also be a speaker module. When the first speaker 81 is a speaker module, in a possible implementation, refer to Figure 10, which is a cross-sectional view of the electronic device shown in Figure 5 along the DD' direction. As shown in Figure 10, the speaker module also includes a front shell 86, and the front shell 86 and the speaker core 84 form a front cavity Q1. A connecting hole 861 is provided on the front shell 86, and the connecting hole 861 can connect the front cavity Q1 and the auxiliary hole 323. In this way, the front cavity Q1 and the auxiliary cavity Q3 are connected through the connecting hole 861 and the auxiliary hole 323.

[0082] It should be noted here that Figure 10 only shows the position and structure of the speaker module by way of example. In actual settings, when the speaker module also includes a front shell 86, the specific position and structure of the speaker module are similar to those in the existing technology. For details, please refer to the existing technology and will not be repeated here.

[0083] That is to say, regardless of whether the first speaker 81 is a speaker unit or a speaker module, the first groove 3221 formed on the middle plate, the display screen 12 and the back glue 13 can be used to form an auxiliary cavity Q3, thereby achieving the effect of suppressing the resonance peak. In this way, technical personnel in this field can more flexibly choose the type of speaker during the preparation of electronic equipment.

[0084] It should be noted here that FIG10 is an example of a speaker module in which the speaker module includes a front shell 86, the front shell 86 and the speaker core 84 enclose a front cavity Q1, and the entire cavity serves as the rear cavity Q2 of the speaker. This arrangement can achieve better audio effects. However, this does not constitute a limitation of the present application. In other embodiments of the present application, see FIG11, which is another cross-sectional view of the electronic device shown in FIG5 along the DD' direction. As shown in FIG11, the speaker module can also include a rear shell 87, and the front shell 86 and the rear shell 87 are assembled together to form a accommodating cavity. The speaker core 84 is located in the accommodating cavity, dividing the accommodating cavity into a front cavity Q1 and a rear cavity Q2. The structure and assembly relationship of the front shell 86 and the rear shell 87 of the speaker are similar to those of the prior art. For details, please refer to the prior art and will not be repeated here.

[0085] In this case (where the speaker module includes at least the front housing 86), it is considered that some sound waves intended to be directed outside the mobile phone 100 through the sound outlet 300 may leak through the gap between the front housing 86 and the first surface 321 of the middle plate 32 before entering the auxiliary cavity Q3. Continuing with FIG. 11 , the mobile phone 100 further includes an annular seal 862, which is positioned between the front housing 86 and the first surface 321 of the middle plate 32 and is disposed around the periphery of the communication hole 861.

[0086] The embodiment of the present application does not limit the type of the annular seal 862, as long as it can prevent sound leakage in the gap between the front housing 86 and the first surface 321 of the middle plate 32. For example, the annular seal 862 includes adhesive backing.

[0087] In summary, since a middle plate 32 is provided at the location where the main board 40 of the mobile phone 100 is set, in the embodiment of the present application, the first speaker 81 arranged adjacent to the main board 40 uses the middle plate 32 to form an auxiliary cavity Q3, which can suppress the resonance peak without the need to set a separate structure for suppressing the resonance peak, and the structure is simple.

[0088] The above describes the specific structure and principle of the first speaker 81 arranged near the main board 40 to achieve the effect of suppressing the resonance peak. The following describes the specific structure and principle of the second speaker 82 arranged near the sub-board 50 to achieve the effect of suppressing the resonance peak.

[0089] Referring to Figures 12, 13, and 14, Figure 12 is a schematic diagram of the front structure of a speaker provided in an embodiment of the present application, Figure 13 is a schematic diagram of the back structure of a speaker provided in an embodiment of the present application, and Figure 14 is a cross-sectional view of the electronic device shown in Figure 1 along the EE' direction. Referring to Figures 12-14, second speaker 82 is a speaker module, which includes a speaker core 84 and a front housing 86.

[0090] Optionally, the speaker module may also include a rear shell (not shown in the figure), that is, the front shell 86 and the rear shell are assembled together to form a accommodating cavity, and the speaker core 84 is located in the accommodating cavity, dividing the accommodating cavity into a front cavity Q1 and a rear cavity Q2, that is, the gap between the front shell 86 and the speaker core 84 is the front cavity Q1, and the gap between the rear shell and the speaker core 84 is the rear cavity Q2. The structure and assembly relationship of the front shell 86 and the rear shell of the speaker are similar to those of the existing technology. For details, please refer to the existing technology and will not be repeated here. Of course, the speaker module may also not include a rear shell. When the speaker module does not include a rear shell, the gap between the front shell 822 and the speaker core 821 is the front cavity Q1, and the entire cavity serves as the rear cavity Q2 of the speaker. This arrangement can achieve better audio effects. The embodiments of this application are all described by taking the second speaker module 82 that does not include a rear shell as an example.

[0091] The front housing 86 includes a front wall 863 and a side wall 864 disposed around the edge of the front wall 863. Along the Z-axis, the front wall 863 includes a third surface 8631 and a fourth surface 8632 facing each other. The fourth surface 8632 is located on the side of the third surface 8631 facing away from the speaker core 84.

[0092] It should be noted here that Figure 14 only shows the position and structure of the speaker module by way of example. In actual settings, the specific position and structure of the speaker module are similar to those in the existing technology. For details, please refer to the existing technology and will not be repeated here.

[0093] Referring to Figures 15-18, Figure 15 is a schematic diagram of the front structure of a front shell provided in an embodiment of the present application when a sealing plate is not provided, Figure 16 is a schematic diagram of the back structure of a front shell provided in an embodiment of the present application when a damping structure is provided, Figure 17 is a schematic diagram of the back structure of a front shell provided in an embodiment of the present application when a damping structure is not provided, and Figure 18 is a cross-sectional view of the speaker shown in Figure 13 along the FF' direction, wherein, in order to clearly demonstrate the inventive point of the present application, Figure 18 only shows part of the structure, not the entire structure. As shown in Figures 12-18, the speaker module also includes an auxiliary cavity Q3, the auxiliary cavity Q3 includes a transmission pipe Q31 and a silencer cavity Q32 communicating with the transmission pipe Q31, and the fourth surface 8632 of the front wall 863 is partially recessed to form a second groove 8221c. The speaker module also includes a sealing plate 88, which covers the second groove 8221c and forms a transmission conduit Q31. Specifically, the transmission conduit Q31 is formed by the front housing 86, eliminating the need for a separate configuration. Portions of the transmission conduit Q31 are located on the side of the front cavity Q1 facing away from the speaker core 84. The transmission conduit Q31 has a length L and a cross-sectional area S1. The cross-sectional area of ​​the muffler cavity Q32 where it connects to the transmission conduit Q31 is S2, with S2 being greater than S1. The length of the transmission conduit Q31 is the dimension of the transmission conduit Q31 along the X-axis in FIG. 8 , the cross-sectional area of ​​the transmission conduit Q31 is the projection area of ​​the transmission conduit Q31 onto the plane defined by the Y and Z axes, and the cross-sectional area of ​​the muffler cavity Q32 where it connects to the transmission conduit Q31 is the projection area of ​​the muffler cavity Q32 where it connects to the transmission conduit Q31 onto the plane defined by the Y and X axes. The third surface 8631 of the front wall 863 is partially recessed to form an auxiliary hole 323, which connects the front cavity Q1 and the transmission pipe Q31. The damping structure 85 is arranged on the third surface 8631 of the front wall 863 and covers the auxiliary hole 323. The damping structure 85 may, for example, include a mesh, etc., wherein the mesh includes, for example, a breathable mesh or a dustproof net, etc. The embodiment of the present application does not limit the type of the damping structure 85 and the type of mesh when the damping structure 85 is a mesh.

[0094] The location of the silencer chamber Q32 is not limited in the embodiment of the present application, as long as it can communicate with the transmission pipe Q31.

[0095] In one possible implementation, it can be seen from the above content that the entire cavity can be used as the rear cavity Q2 of the speaker. Therefore, a silencer cavity Q32 can be set in the rear cavity Q2. Since the area of ​​the rear cavity Q2 is larger, the volume of the silencer cavity Q32 can also be set larger. In this way, the auxiliary cavity Q3 has a better effect in suppressing resonance. The reasons can be found in the above content and will not be repeated here.

[0096] In this case, in order to simplify the process steps of forming the silencer cavity Q32, referring to Figures 13, 16 and 18, the front shell 86 includes a first part 865 and a second part 866, the first part 865 and the speaker core 84 form the front cavity Q1, and the speaker module also includes a silencer cover 89, the silencer cover 89 and the second part 866 form the silencer cavity Q32, that is, part of the structure of the front shell 86 cooperates with the silencer cover 89 to form the silencer cavity Q32, the structure of the silencer cavity Q32 is simple, and the process steps for forming it are simple.

[0097] In order to avoid the setting of the sealing plate 88 increasing the thickness of the speaker module, referring to Figures 12, 14 and 15, the fourth surface 8632 of the front wall 863 is partially recessed to form a third groove 8221d. The third groove 8221d is arranged around the second groove 8221c, and along the Z-axis direction, the recess depth of the third groove 8221d is smaller than the recess depth of the second groove 8221c. The sealing plate 88 is located in the third groove 8221d, that is, the sealing plate 88 is embedded in the front wall 863. This arrangement is conducive to the lightweight design of the speaker module, and thus to the lightweight design of electronic equipment.

[0098] In summary, the second speaker 82 arranged adjacent to the sub-panel 50 uses its front shell to form an auxiliary hole 323 and a transmission pipe Q31, and connects the front cavity Q1 and the transmission pipe Q31 through the auxiliary hole 323, and then connects the silencer cavity Q32 through the transmission pipe Q31, thereby realizing the connection between the front cavity Q1 and the silencer cavity Q32, and the auxiliary hole 323 is covered with a damping structure 85, so that the resonance peak can be better suppressed, and the structure is simple.

[0099] From the specific structure and principle of the first and second speakers for achieving the effect of suppressing the resonance peak, it can be seen that the speaker provided in the embodiment of the present application has a good effect of suppressing high-frequency resonance peaks, which can avoid the electronic device from producing a harsh listening experience when using the speaker to make sound, thereby improving the user experience.

[0100] To illustrate in detail the speaker provided in this application, which has a good effect in suppressing high-frequency resonance peaks, the following is explained by comparing it with a speaker in which the auxiliary cavity Q3 is set on one side of the front cavity Q1 (in the X-axis direction or the Y-axis direction).

[0101] Figure 19 shows a comparison diagram of the relationship between frequency and loudness simulated when the auxiliary cavity is set on one side of the front cavity and when at least part of the auxiliary cavity is set on the upper side of the front cavity. Since the simulation results of the first speaker 81 and the simulation results of the second speaker 82 are similar, Figure 19 only shows one of the simulation results (the simulation results of the first speaker 81). In Figure 19, the horizontal axis is frequency (Frequency), the unit is Hertz (Hz), and the vertical axis is loudness (SPL), the unit is dB.

[0102] As shown in Figure 19, through simulation results, it was found that in the speaker provided in the embodiment of the present application (the speaker in which at least part of the auxiliary cavity is arranged on the upper side of the front cavity), the two small harmonic peaks disappeared at the position where the two small harmonic peaks originally appeared, the loudness curve became smooth, and the loudness decreased significantly.

[0103] Therefore, through simulation, it can be seen that the speaker provided in the embodiment of the present application has a better effect of suppressing high-frequency resonance peaks due to the setting of the damping structure and the volume of the silencer cavity can be made larger, which can avoid the electronic device from producing a harsh listening experience when using the speaker to make sound, thereby improving the user experience.

[0104] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that: include: A whole machine housing and at least one speaker, wherein the whole machine housing surrounds and forms a whole machine cavity, and the speaker is located in the whole machine cavity; The whole machine housing is provided with a sound outlet; The speaker comprises a speaker core, a front cavity and a rear cavity, the front cavity has a sound outlet channel, and the sound outlet channel is communicated with the sound outlet hole; The speaker also includes an auxiliary cavity, at least part of which is located on the side of the front cavity away from the speaker core; the auxiliary cavity includes a transmission pipe and a silencer cavity connected to the transmission pipe, the transmission pipe is connected to the front cavity through an auxiliary hole, and the auxiliary hole is covered with a damping structure.

2. The electronic device according to claim 1, characterized in that: The whole housing includes a middle frame and a display screen, the middle frame includes an appearance part and a middle plate, the middle plate is located inside the appearance part, and the appearance part is provided with the sound outlet hole; The middle plate includes a first surface and a second surface opposite to each other, the second surface is located on the side of the first surface away from the speaker, the display screen is located on the side of the second surface away from the first surface, the second surface of the middle plate is partially recessed to form a first groove, the first groove and the display screen surround the auxiliary cavity, and the auxiliary hole is opened on the middle plate.

3. The electronic device according to claim 2, characterized in that: The gap between the speaker core and the first surface is the front cavity, and at least a portion of the entire cavity except the front cavity is the rear cavity.

4. The electronic device according to claim 2, characterized in that: The speaker further comprises a front housing, wherein the front housing and the speaker inner core enclose the front cavity; The front shell body is provided with a communication hole, which communicates the front cavity and the auxiliary hole.

5. The electronic device according to claim 4, characterized in that: The electronic device further includes an annular sealing member located between the front housing and the first surface and arranged around the periphery of the communication hole.

6. A speaker module, characterized in that: The speaker module comprises a speaker housing and a speaker core, wherein the speaker module has a housing cavity, the speaker core divides the housing cavity into a front cavity and a rear cavity, the speaker housing comprises a front shell, and the front shell and the speaker core enclose the front cavity; The speaker module further includes an auxiliary cavity, at least part of which is located on a side of the front cavity away from the speaker core; the auxiliary cavity includes a transmission pipe and a muffler cavity communicating with the transmission pipe, the transmission pipe communicates with the front cavity through an auxiliary hole, and the auxiliary hole is covered with a damping structure; The front housing comprises a front wall and a side wall arranged around the edge of the front wall, the front wall comprises a third surface and a fourth surface opposite to each other, the fourth surface is located on a side of the third surface away from the speaker core; the third surface of the front wall is partially recessed to form the auxiliary hole, and the fourth surface of the front wall is partially recessed to form a second groove; The speaker module also includes a sealing plate, which covers the second groove to form the transmission pipe; the auxiliary hole connects the front cavity and the transmission pipe.

7. The speaker module according to claim 6, characterized in that: The fourth surface of the front wall is partially recessed to form a third groove, the third groove is arranged around the second groove, and the recess depth of the third groove is smaller than the recess depth of the second groove, and the sealing plate is located in the third groove.

8. The speaker module according to claim 6 or 7, characterized in that: Applied in an electronic device, the electronic device comprises a whole machine housing, the whole machine housing surrounds and forms a whole machine cavity, the speaker core and at least a part of the whole machine cavity surround the back cavity, and the silencing cavity is located in the back cavity.

9. The speaker module according to any one of claims 6 to 8, characterized in that: The front housing comprises a first part and a second part; the first part and the speaker core enclose the front cavity; The speaker module also includes a sound-absorbing cover, and the sound-absorbing cover and the second part enclose the sound-absorbing chamber.

10. The speaker module according to any one of claims 6 to 9, characterized in that: The damping structure comprises a mesh.

11. An electronic device, characterized in that: The electronic device is the electronic device according to any one of claims 1 to 5; The electronic device also includes the speaker module described in any one of claims 6-10.

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