Loudspeaker module and electronic equipment

Abstract

The embodiment of the invention provides a loudspeaker module and electronic equipment, relates to the technical field of electronic equipment, and can prevent the electronic equipment from generating harsh hearing feeling when a loudspeaker is used for sounding, thereby improving the user experience. The electronic equipment comprises a complete machine shell and at least one loudspeaker, the complete machine shell is provided with a complete machine cavity, and the loudspeaker is located in the complete machine cavity; a sound outlet hole is formed in the complete machine shell; the loudspeaker comprises a loudspeaker inner 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, away from the loudspeaker core, of the front cavity. The auxiliary cavity comprises a transmission pipeline and a silencing cavity communicated with the transmission pipeline, the transmission pipeline is communicated with the front cavity through an auxiliary hole, and the auxiliary hole is covered with a damping structure.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a speaker module and electronic equipment. Background Art

[0002] 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.

[0003] 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. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a speaker module and an electronic device, which can avoid the electronic device from producing a harsh listening experience when using a speaker to make sound, thereby improving the user experience.

[0005] In the first aspect, an embodiment of the present application provides an electronic device, which includes an entire housing and at least one speaker, wherein 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.

[0006] By disposing 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 arranged on one side of the front cavity, the damping structure cannot be arranged) to increase damping, thereby improving the performance of the speaker; and compared with providing the auxiliary cavity in the accommodating cavity formed by the shell of the speaker module, in the embodiment of the present application, when the auxiliary cavity is located on the middle plate (such as in the specific embodiment Figure 6 or, the auxiliary cavity is located in the rear cavity of the speaker, and the whole cavity serves as the rear cavity of the speaker (such as in the specific embodiment Fig.13 Corresponding content), 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 better.

[0007] 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, the 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 larger fitting area, and in order to ensure the damping effect of the damping structure, it is necessary to fit all around. 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, the 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 contradict the lightweight design of the electronic device.

[0008] 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, 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.

[0009] 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.

[0010] 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.

[0011] 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 achieving stereo.

[0012] 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.

[0013] Exemplarily, the speaker module also includes a rear shell, and the front shell and the rear shell form a containing cavity, and the speaker core is located in the containing 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.

[0014] In some possible implementations, based on the above-mentioned speaker further including a front shell, the front shell and the speaker inner 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 connecting hole.

[0015] The annular seal is provided to prevent sound from leaking at the gap between the front housing and the first surface.

[0016] 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.

[0017] 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 setting the auxiliary cavity on one side of the front cavity, the electronic device provided by the present application is convenient for setting the damping structure (if it is set on one side of the front cavity, the damping structure cannot be set), and because the space of the auxiliary cavity is no longer limited to one side of the front cavity of the speaker, the volume of the auxiliary cavity can also be increased, so that the effect of suppressing the high-frequency resonance peak is good. And the transmission pipeline is formed by using the front shell, and there is no need to set a separate transmission pipeline.

[0018] Exemplarily, the rear cavity of the speaker module can be a closed rear cavity, or at least part of the whole machine cavity is the rear cavity of the speaker module. When at least part of the whole machine cavity is the rear cavity of the speaker module, the setting space of the auxiliary cavity can be increased, and the auxiliary cavity has a better effect in suppressing resonance.

[0019] In some possible implementations, 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 less than the recess depth of the second groove, and the sealing plate is located in the third groove. This arrangement is conducive to the lightweight design of the speaker module, and further to the lightweight design of the electronic device.

[0020] In some possible implementations, the speaker module is applied to an electronic device, which includes a complete housing, the complete housing surrounds a complete cavity, the speaker core and at least a portion 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.

[0021] In some possible implementations, the front housing includes a first part and a second part; the first part and the speaker core form a front cavity; the speaker module also includes a muffler cover, and the muffler cover and the second part form a muffler cavity. That is, a part of the structure of the front housing cooperates with the muffler cover to form a muffler cavity, and the structure of the muffler cavity is simple, and the process steps for forming the muffler cavity are simple.

[0022] 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.

[0023] 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.

[0024] 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. The technical effects corresponding to the third aspect and any implementation of the third aspect can refer to the technical effects corresponding to the above-mentioned first aspect and any implementation of the first aspect, and the technical effects corresponding to the above-mentioned second aspect and any implementation of the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 An exploded view of the electronic device shown;

[0027] Figure 3 This is a simplified structural diagram of the loudspeaker;

[0028] Figure 4 A comparison diagram of the relationship between frequency and loudness after simulating a speaker without an auxiliary cavity and a speaker with an auxiliary cavity;

[0029] Figure 5 A schematic diagram of the back structure of an electronic device provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the structure of a middle frame provided in an embodiment of the present application;

[0031] Figure 7 for Figure 5 A cross-sectional view of the electronic device shown along the AA' direction;

[0032] Figure 8 for Figure 6 An enlarged view of the middle frame BB area is shown;

[0033] Fig. 9 for Figure 8 The cross-sectional view of the middle plate along the CC' direction;

[0034] Fig.10 for Figure 5 A cross-sectional view of the electronic device shown along the DD' direction;

[0035] Fig.11 for Figure 5 Another cross-sectional view of the electronic device shown along the DD' direction;

[0036] Fig.12 A schematic diagram of the front structure of a speaker provided in an embodiment of the present application;

[0037] Fig.13 A schematic diagram of the back structure of a speaker provided in an embodiment of the present application;

[0038] Fig.14 for Figure 1 A cross-sectional view of the electronic device shown along the EE' direction;

[0039] Fig.15 A schematic diagram of the front structure of a front housing provided in an embodiment of the present application when no sealing plate is provided;

[0040] Fig.16 A schematic diagram of the back structure of a front housing provided with a damping structure according to an embodiment of the present application;

[0041] Fig.17 A schematic diagram of the back structure of a front housing provided in an embodiment of the present application without a damping structure;

[0042] Fig.18 for Fig.13 A cross-sectional view of the loudspeaker along the FF' direction;

[0043] Fig.19 The diagram is a comparison 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 part of the auxiliary cavity is disposed on the upper side of the front cavity. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The term "and / or" in this article is merely a description of the association relationship of 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.

[0046] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0047] In the embodiments of the present 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 the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0048] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0049] 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.

[0050] There are generally two types of speakers: speaker modules and speaker units.

[0051] The speaker module generally includes a speaker shell and a speaker core. The speaker shell alone forms a housing cavity or the speaker shell and other parts of the electronic device cooperate to form a housing cavity. The speaker core is located in the housing cavity and divides the housing cavity into a front cavity and a rear cavity. For example, the speaker shell 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 surrounded by the speaker shell into a front cavity and a rear cavity. For another example, the speaker shell is a front shell. The front shell and the speaker core form a front cavity. The entire cavity of the entire electronic device serves as the rear cavity of the speaker module. In this way, better audio effects, such as stereo, can be achieved in the limited architectural space of the electronic device.

[0052] For the speaker unit, it does not have an independent shell, but only includes a speaker core. When it is set in the whole 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 whole cavity of the electronic device except the front cavity forms a rear cavity.

[0053] The embodiment of the present application provides an electronic device, which may be a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA), a 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 embodiment of the present application does not specifically limit the specific form of the above electronic device. For the convenience of explanation, the following description is made by taking the electronic device as an example of a mobile phone.

[0054] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the back structure of an electronic device provided in an embodiment of the present application is shown. Figure 2 for Figure 1 An exploded view of the electronic device shown. Figure 1 and Figure 2 As shown, the 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 (Flexible Printed Circuit, FPC) 60 connecting the main board 40 and the sub-board 50, a battery 70 and at least one speaker 80 and other structures.

[0055] Understandably, Figure 1 and Figure 2 The following figures and the related drawings only schematically illustrate some components of the mobile phone 100, and the actual shapes, sizes, positions and structures of these components are not subject to Figure 1 and Figure 2In addition, when the electronic device is a device of some other form, the electronic device 100 may not include at least one of the display module 10, the back cover 20, the sub-board 50, the FPC 60, the battery 70, etc.

[0056] Figure 1 and Figure 2 In the figure, 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 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 can be understood 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.

[0057] Continue to see Figure 1 and Figure 2 The display panel 10 includes a cover plate 11 and a display screen 12 stacked along the Z-axis direction. 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 screen, and an LED display screen, among which the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, and the like. The embodiment of the present application does not limit the type of the display screen 12.

[0058] Along the Z-axis direction, the back cover 20 is located on the side of the display screen 12 away from the cover plate 11, wherein the material of the back cover 20 may include, for example, opaque materials such as plastic, plain leather, and glass fiber; or may include translucent materials such as glass. The material of the back cover 20 is not limited in the embodiment of the present application.

[0059] The middle frame 30 is located between the cover plate 11 and the back cover 20. The middle frame 30 includes an annular appearance part 31 exposed to the outside and a middle plate 32 located inside the annular appearance part 31 and between the display screen 12 and the back cover 20. The cover plate 11, the annular appearance part 31 and the back cover 20 can enclose the entire machine cavity.

[0060] 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 complete housing of the electronic device, and the complete housing has a complete cavity; when the electronic device is a device of some other form, the structure of the device exposed to the outside is the complete housing, and the complete housing has a complete cavity.

[0061] The display screen 12, the main board 40, the sub-board 50, the FPC 60, the battery 70, the speaker 80 and other structures are located in the whole machine cavity, and the middle plate 32 supports some structures in the whole machine cavity. For example, the display module 10 is set on the middle plate 32 by 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 (such as Figure 7 ), which will not be described here.

[0062] Along the Y-axis direction, the main board 40 and the sub-board 50 are 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 achieve data and signal transmission between the main board 40 and the sub-board 50 .

[0063] A control chip is integrated on the mainboard 40. The control chip includes, for example, a system on chip (SoC) and an application processor (AP). Among them, the SoC integrates, for example, a central processing unit (CPU), a graphic processing unit (GPU), and a modem.

[0064] The sub-board 50 integrates an antenna radio frequency front end, a Universal Serial Bus (USB) device, and the like.

[0065] The battery 70 is used to supply power to 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.

[0066] The speaker 80 is used to convert audio signals such as music and voice into sound, and can support the function of external audio. 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, 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, 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 that at least one speaker 80 includes at least one first speaker 81 and at least one second speaker 82.

[0067] The first speaker 81 is a speaker disposed 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 disposed 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 arrangement positions of the first speaker 81 and the second speaker 82 are similar to those of the related prior art, and the details can be referred to the related prior art, and the embodiments of the present application will not be repeated. 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 at 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 which are connected to their sound outlet channels 800 to be heard by the user.

[0068] As can be seen from the background technology, when an electronic device uses a speaker to make sound, it sometimes produces a harsh listening experience, affecting the user experience. After research, it was found that this is because when the sound is transmitted from the sound outlet channel 800 to the sound outlet hole 300, the speaker causes the front cavity resonance to occur, causing the speaker 80 to form a higher high-frequency resonance peak in certain frequency bands (areas where the human ear is more sensitive).

[0069] In order to suppress the high-frequency resonance peak and improve the sound output of the speaker, see Figure 3 , Figure 3 This is a simplified structural diagram of the speaker. Figure 3 As shown, the speaker 80 also includes an auxiliary cavity 83. Along the X-axis direction, the auxiliary cavity 83 is located on one side of the front cavity Q1 (surrounded by the front wall, the side wall 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 , Figure 4 The figure is a comparison of the relationship between frequency and loudness of the speaker without auxiliary cavity and the speaker with auxiliary cavity (the auxiliary cavity is located on the side of the front cavity), where: Figure 4 The horizontal axis is frequency (Frequency), the unit is Hertz (Hz), and the vertical axis is loudness (SPL), the unit is dB. Figure 4 As shown, when the speaker adopts Figure 3When the auxiliary cavity 83 is used as shown, two small resonance peaks will appear after the single high-frequency resonance peak is suppressed. Moreover, 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 the volume of the auxiliary cavity 83 is small, and the loudness of the two small resonance peaks is still large. That is, when the speaker adopts Figure 3 When the auxiliary cavity 83 is shown, the speaker has a poor effect in suppressing high-frequency resonance peaks, so that the user can still hear harsh sounds when using an electronic device including the speaker, affecting the user experience.

[0070] 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 the auxiliary hole being opened on the side wall of the front cavity of the speaker, and the auxiliary cavity being located on one side of the front cavity, a damping structure can be arranged on the auxiliary hole (if it is arranged on one side of the front cavity, the damping structure cannot be arranged) to increase damping, thereby improving the performance of the speaker; and compared with the auxiliary cavity being arranged in the accommodating cavity formed by the shell of the speaker module, in the embodiment of the present application, when the auxiliary cavity is located on the middle plate (such as in the specific embodiment), the auxiliary cavity is not arranged on the middle plate. Figure 6 or, the auxiliary cavity is located in the rear cavity of the speaker, and the whole cavity serves as the rear cavity of the speaker (such as in the specific embodiment Fig.13 Corresponding content), that is, 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 better.

[0071] 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, the 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 larger fitting area, and in order to ensure the damping effect of the damping structure, it is necessary to fit all around, thus requiring the height of the side wall of the front cavity (the dimension in the Z-axis direction in the embodiment) to be larger. However, when the height of the side wall of the front cavity is larger, 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, the 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.

[0072] The structure of the speaker is specifically described below in conjunction with an electronic device. The following example is based on the example that the mobile phone 100 is provided with two speakers, and the two speakers include, for example, a first speaker 81 and a second speaker 82. In addition, unless otherwise specified, the following example is based on the example that the first speaker 81 is a speaker unit and the second speaker 82 is a speaker module, and the following example does not constitute a limitation on the present application.

[0073] See also Figure 5-Figure 7 , Figure 5 A schematic diagram of the back structure of an electronic device provided in an embodiment of the present application is shown. Figure 6 A schematic diagram of the structure of a middle frame provided in an embodiment of the present application is shown in FIG. Figure 7 for Figure 5 The cross-sectional view of the electronic device shown in FIG. Figure 5-Figure 7 As shown, the first speaker 81 is a speaker unit, including a speaker core 84. Along the Z-axis direction, the middle plate 32 includes a first surface 321 and a second surface 322 opposite to each other. The second surface 322 is located on the side of the first surface 321 away from the speaker core 84. The display screen 12 is located on the side of the second surface 322 away from the first surface 321. The display screen 12 is fixed on the second surface 322 of the middle plate 32, for example, by means of a back adhesive 13, and the display screen 12 is supported by the middle plate 32. The gap between the speaker core 84 and the first surface 321 of the middle plate 32 is the front cavity Q1 of the first speaker 81, and at least part of the entire cavity except the front cavity Q1 is the rear cavity Q2. In this way, the structure of the speaker can be simplified, and the volume of the rear cavity can be increased, so as to achieve better audio effects, such as stereo sound.

[0074] It should be noted here that Figure 7 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 are shown only as an example. In actual setting, 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 the existing technology. For details, please refer to the existing technology and will not be repeated here.

[0075] See also Figure 8 and Fig. 9 , Figure 8 for Figure 6 The enlarged view of the middle frame BB area is shown. Fig. 9 for Figure 8 The cross-sectional view of the middle plate along the CC' direction. Figure 7-Figure 9As shown, the second surface 322 of the middle plate 32 is partially recessed to form a first groove 3221. The first groove 3221, the display screen 12 and the adhesive backing 13 form an auxiliary cavity Q3. The auxiliary cavity Q3 includes a transmission pipe Q31 and a silencer cavity Q32 communicating with the transmission pipe Q31. The transmission pipe Q31 has a length of L and a cross-sectional area of ​​S1. The cross-sectional area of ​​the silencer cavity Q32 at the position where it is connected to the transmission pipe Q31 (i.e., at the VV region) is S2, and S2 is greater than S1. The length of the transmission pipe Q31 is Figure 8 The size of the transmission pipe Q31 in the X-axis direction, the cross-sectional area of ​​the transmission pipe Q31 is the projection area of ​​the transmission pipe Q31 on the plane composed of 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 projection area of ​​the plane composed of the Y-axis and the Z-axis at the position where the silencer chamber Q32 is connected to the transmission pipe Q31.

[0076] An auxiliary hole 323 is opened on the middle plate 32, and the transmission pipe Q31 is connected with 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, and the damping structure 85 includes, for example, a mesh, 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.

[0077] Specifically, a part of the sound waves outside the mobile phone 100 is guided through the sound outlet 300 to enter the auxiliary cavity Q3. When the sound waves of the preset frequency enter the auxiliary cavity Q3, due to the small cross-sectional area of ​​the transmission pipe Q31, they cannot be transmitted through 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:

[0078]

[0079] f is the preset frequency, C 0is the speed of sound, V is the volume of the silencer cavity Q32, and by adjusting at least one of the length of the transmission pipe Q31, the cross-sectional area of ​​the transmission pipe Q31 and the volume of the silencer cavity Q32, the frequency (i.e., the preset frequency) of the sound wave to be eliminated is adjusted, that is, the value of the corresponding loudness at this frequency is smaller. In this example, by setting the auxiliary hole 323 on the middle plate 32, and along the Z-axis direction, it is located directly above the front cavity Q1 (i.e., the front cavity is away from the speaker core side), so that compared with setting the auxiliary cavity Q3 on one side of the front cavity Q1, that is, along the X-axis direction or the Y-axis direction, the auxiliary cavity Q3 is located on one side of the front cavity Q1, and the damping structure 85 can be covered on the auxiliary hole 323. When the damping structure 85 is covered on the auxiliary hole 323, the damping can be increased, and because 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 accommodating cavity composed of the shell of the speaker module, so the volume of the auxiliary cavity Q3 can also be increased. When the volume of the auxiliary cavity Q3 increases, more sound waves are consumed, the effect of suppressing the resonance peak is better, and the sound effect is further improved, thereby improving the user experience. In addition, since the auxiliary cavity Q3 is formed by using the original structure of the electronic device, there is no need to set up a separate structure, and the structure is simple.

[0080] It should be noted that the above example is based on the first speaker 81 being a speaker unit, but does not constitute a limitation on the present application. In other optional embodiments of the present application, the first speaker 81 may also be a speaker module. When the first speaker 81 is a speaker module, in a possible implementation, see Fig.10 , Fig.10 for Figure 5 A cross-sectional view of the electronic device shown in FIG. Fig.10 As shown, the speaker module further includes a front housing 86, and the front housing 86 and the speaker core 84 form a front cavity Q1. A connecting hole 861 is provided on the front housing 86, and the connecting hole 861 can connect the front cavity Q1 and the auxiliary hole 323, so that the front cavity Q1 is connected to the auxiliary cavity Q3 through the connecting hole 861 and the auxiliary hole 323.

[0081] It should be noted here that Fig.10 The position and structure of the speaker module are shown only as an 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 prior art. For details, please refer to the prior art and will not be repeated here.

[0082] 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 the field can more flexibly choose the type of speaker during the preparation of electronic equipment.

[0083] It should be noted here that Fig.10 When the speaker is a speaker module, the speaker module includes a front shell 86, the front shell 86 and the speaker core 84 form a front cavity Q1, and the entire cavity is used as the rear cavity Q2 of the speaker. This configuration can achieve better audio effects. However, this does not constitute a limitation of the present application. In other embodiments of the present application, see Fig.11 , Fig.11 for Figure 5 Another cross-sectional view of the electronic device along the DD' direction is shown. Fig.11 As shown, the speaker module may also include a rear shell 87. The front shell 86 and the rear shell 87 are assembled together to form a containing cavity. The speaker core 84 is located in the containing cavity, dividing the containing 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 existing technology. For details, please refer to the existing technology and will not be repeated here.

[0084] In this case (the speaker module includes at least the front housing 86), it is considered that a portion of the sound waves that need to be directed out of the outside of 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. Fig.11 The mobile phone 100 further includes an annular seal 862 , which is located between the front housing 86 and the first surface 321 of the middle plate 32 and is arranged around the periphery of the communicating hole 861 .

[0085] 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. Exemplarily, the annular seal 862 includes adhesive backing, etc.

[0086] 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 separately set a structure for suppressing the resonance peak, and the structure is simple.

[0087] 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.

[0088] See also Fig.12 , Fig.13 and Fig.14 , Fig.12A schematic diagram of the front structure of a speaker provided in an embodiment of the present application is shown in FIG. Fig.13 A schematic diagram of the back structure of a speaker provided in an embodiment of the present application is shown in FIG. Fig.14 for Figure 1 The cross-sectional view of the electronic device shown is taken along the EE' direction. Figure 12-14 The second speaker 82 is a speaker module, and the speaker module includes a speaker core 84 and a front shell 86.

[0089] Optionally, the speaker module may also include a rear housing (not shown in the figure), that is, the front housing 86 and the rear housing are assembled together to form a housing cavity, the speaker core 84 is located in the housing cavity, and the housing cavity is divided into a front cavity Q1 and a rear cavity Q2, that is, the gap between the front housing 86 and the speaker core 84 is the front cavity Q1, and the gap between the rear housing and the speaker core 84 is the rear cavity Q2. The structure and assembly relationship of the front housing 86 and the rear housing 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. Of course, the speaker module may not include the rear housing. When the speaker module does not include the rear housing, the gap between the front housing 822 and the speaker core 821 is the front cavity Q1, and the entire machine cavity serves as the rear cavity Q2 of the speaker. This arrangement can achieve better audio effects. The embodiments of the present application are all described by taking the second speaker module 82 not including the rear housing as an example.

[0090] The front housing 86 includes a front wall 863 and a side wall 864 arranged around the edge of the front wall 863. Along the Z-axis direction, the front wall 863 includes a third surface 8631 and a fourth surface 8632 facing each other, and the fourth surface 8632 is located on the side of the third surface 8631 away from the speaker core 84.

[0091] It should be noted here that Fig.14 The position and structure of the speaker module are shown only as an example. In actual settings, the specific position and structure of the speaker module are similar to those in the prior art. For details, please refer to the prior art and will not be repeated here.

[0092] See also Figure 15-18 , Fig.15 This is a schematic diagram of the front structure of a front housing provided by an embodiment of the present application when a sealing plate is not provided. Fig.16 A schematic diagram of the back structure of a front housing provided with a damping structure according to an embodiment of the present application, Fig.17 This is a schematic diagram of the back structure of a front housing provided in an embodiment of the present application without a damping structure. Fig.18 for Fig.13 The cross-sectional view of the loudspeaker along the FF' direction is shown, wherein, in order to clearly demonstrate the inventive point of the present application, Fig.18 Only part of the structure is shown, not all of it. Figure 12-Figure 18As shown, the speaker module also includes an auxiliary cavity Q3, which 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 to form a transmission pipe Q31, that is, the transmission pipe Q31 is formed by using the front shell 86, and there is no need to set up the transmission pipe Q31 separately, and part of the transmission pipe Q31 is located on the side of the front cavity Q1 away from the speaker core 84. The length of the transmission pipe Q31 is L, and the cross-sectional area is S1. The cross-sectional area of ​​the silencer cavity Q32 at the position where it is connected to the transmission pipe Q31 is S2, and S2 is greater than S1. Among them, the length of the transmission pipe Q31 is Figure 8 The size of the transmission pipe Q31 in the X-axis direction, the cross-sectional area of ​​the transmission pipe Q31 is the projection area 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 projection area of ​​the plane formed by the Y-axis and the X-axis at the position where the silencer chamber Q32 is connected to the transmission pipe Q31. The third surface 8631 of the front wall 863 is partially recessed to form an auxiliary hole 323, and the auxiliary hole 323 connects the front chamber 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 include 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.

[0093] The setting position 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.

[0094] In one possible implementation, it can be seen from the foregoing 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 can better suppress resonance. The reasons can be found in the above content and will not be repeated here.

[0095] In this case, in order to simplify the process steps of forming the muffler cavity Q32, continue to refer to Fig.13 , Fig.16 and Fig.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 a front cavity Q1. The speaker module also includes a silencer cover 89. The silencer cover 89 and the second part 866 form a 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.

[0096] In order to avoid the sealing plate 88 increasing the thickness of the speaker module, Fig.12 , Fig.14 and Fig.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 less 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 then to the lightweight design of the electronic device.

[0097] In summary, the second speaker 82 arranged adjacent to the sub-panel 50 utilizes 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.

[0098] From the specific structure and principle of the first speaker and the second speaker to achieve 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.

[0099] To explain in detail the speaker provided in the present application, which has a good effect of 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 (X-axis direction or Y-axis direction).

[0100] Fig.19 A comparison diagram of the relationship between the simulated frequency and loudness when the auxiliary cavity is arranged on one side of the front cavity and when at least part of the auxiliary cavity is arranged on the upper side of the front cavity is shown. Since the simulation result of the first speaker 81 is similar to the simulation result of the second speaker 82, Fig.19 Only one of the simulation results (the simulation result of the first speaker 81) is shown. Fig.19 The horizontal axis is frequency (Frequency), the unit is Hertz (Hz), and the vertical axis is loudness (SPL), the unit is dB.

[0101] like Fig.19 As shown, through simulation results, it is found that for the speaker provided in the embodiment of the present application (a 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 disappear at the positions where the two small harmonic peaks originally appeared, the loudness curve becomes smooth, and the loudness is significantly reduced.

[0102] Therefore, through simulation, it can be known 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 chamber 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.

[0103] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned 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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