Loudspeaker and terminal

Abstract

The embodiment of the application provides a loudspeaker and a terminal, which comprise a shell with a containing space and a sound emitting unit fixed in the containing space, the sound emitting unit is provided with a diaphragm for vibrating and emitting sound, the shell comprises a first inner bottom wall and an inner side wall fixedly connected with the first inner bottom wall, the diaphragm is fixedly connected with the inner side wall to separate the containing space into a front cavity and a rear cavity, the first inner bottom wall is located in the front cavity, the inner side wall is provided with a sound hole, the front cavity and the sound hole are connected to form a front cavity channel, the diaphragm is arranged to be inclined relative to the first inner bottom wall, and the diameter of the end, which is connected with the sound hole, of the front cavity is greater than the diameter of the end, which is away from the sound hole, of the front cavity, so that the airflow is smooth, the vortex intensity of the folded ring periphery is reduced, the generation of noise is reduced, and the sound effect of the loudspeaker is improved.

Description

Technical Field

[0001] This application relates to the field of acoustic technology, and in particular to a loudspeaker and terminal. Background Technology

[0002] Currently, speakers are an important component of mobile phones, tablets and other devices, and sound quality is crucial to the user experience.

[0003] Figure 1 The image shows a commonly used existing loudspeaker 10a. A sound-generating unit 13a is fixedly housed within a housing 11a. The sound-generating unit 13a has a diaphragm 131a for vibrating and producing sound. The diaphragm 131a and the inner wall of the housing 11a form a front cavity 101a that communicates with the sound outlet 111a. Air propelled by the diaphragm 131a flows through the front cavity 101a and exits through the sound outlet 111a, thus producing sound. If the airflow velocity in the front cavity 101a is too high, turbulence will occur; if the airflow in the front cavity 101a encounters a structural abrupt change, eddies are easily generated. Both turbulence and eddies produce noise. Simulation of the loudspeaker 10a using software revealed that the area with the most severe turbulence and eddies is the region of the diaphragm 131a near the sound outlet 111a. Figure 2 Area II as shown and as Figure 3 As shown in Region III, Region II is an area with more abnormal airflow noise, while Region III is an area with abnormally high airflow velocity. The main reason is... (Please refer to...) Figure 4 In the Z direction, due to the folded ring 1311a of the diaphragm 131a facing the front cavity 101a, the size of the front cavity 101a near the sound hole 111a is much smaller than other areas. As a result, the speaker 10a is prone to generating noise, leading to poor sound quality and affecting the user experience. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of this application is to provide a speaker and terminal that can reduce noise and improve sound effect.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a loudspeaker, including a housing with a receiving space and a sound-generating unit fixed within the receiving space. The sound-generating unit has a diaphragm for vibrating and generating sound. The housing includes a first inner bottom wall and an inner side wall fixedly connected to the first inner bottom wall. The diaphragm is fixedly connected to the inner side wall to isolate the receiving space into a front cavity and a rear cavity. The first inner bottom wall is located in the front cavity and is disposed opposite to the diaphragm. A sound outlet hole is formed through the inner side wall. The front cavity communicates with the sound outlet hole to form a front cavity channel. The diaphragm is disposed at an inclination relative to the first inner bottom wall, and the diameter of the end of the front cavity connected to the sound outlet hole is larger than the diameter of the end of the front cavity away from the sound outlet hole.

[0007] In this embodiment, the diaphragm is inclined relative to the first inner bottom wall, and the diameter of the end of the front cavity connected to the sound outlet is larger than the diameter of the end of the front cavity away from the sound outlet. In other words, the cross-sectional area of ​​the front cavity at the end connected to the sound outlet is larger than the cross-sectional area of ​​the front cavity at the end away from the sound outlet, making the cross-section of the front cavity approximately trumpet-shaped. This smooths the airflow, reduces the intensity of turbulence, and reduces the intensity of eddies caused by structural abrupt changes on the side adjacent to the sound outlet, such as structural abrupt changes in the front cavity caused by the height of the diaphragm's surround. By reducing the intensity of eddies and turbulence in the front cavity channel, noise generation is reduced, the sound effect of the speaker is improved, and the user experience is enhanced.

[0008] In one embodiment, the diameter of the front cavity channel increases from the end of the front cavity away from the sound outlet to the end of the sound outlet away from the front cavity. That is, the front cavity channel is also roughly trumpet-shaped, which increases the space at the connection between the sound outlet and the front cavity, which can smooth the airflow, reduce the intensity of turbulence and the generation of noise, and further improve the sound effect of the loudspeaker.

[0009] In one embodiment, the diaphragm has a folded ring protruding towards the front cavity. The wall of the sound outlet includes a first hole wall and a second hole wall disposed opposite to each other. The second hole wall is fixedly connected to the first inner bottom wall. The first inner bottom wall is located on one side of the extension line of the first hole wall, and the folded ring is located on the other side of the extension line away from the first inner bottom wall. The shortest distance between the folded ring and the extension line is not less than 0. In this way, the resistance effect of the folded ring on the airflow flowing in the front cavity is reduced, the generation of eddies can be reduced, and the generation of noise can be further reduced.

[0010] In one embodiment, the first hole wall and the second hole wall are inclined in a second direction toward the side where the sound-generating unit is located, so as to guide the flow of air, that is, to further guide the propagation of sound.

[0011] In one embodiment, the inner sidewall is provided with a first mounting platform, which is fixedly connected to the sound-generating unit, thereby increasing the connection area between the sound-generating unit and the inner sidewall, which is beneficial to improving the support stability of the shell for the sound-generating unit.

[0012] In one embodiment, the top surface of the first mounting platform is disposed away from the first inner bottom wall. The height of the end of the top surface adjacent to the sound outlet from the first inner bottom wall is greater than the height of the end of the top surface away from the sound outlet from the first inner bottom wall. The top surface is fixedly connected to the side of the diaphragm facing the first inner bottom wall, thereby tilting the sound-generating unit relative to the second direction. Elevating and supporting the end of the sound-generating unit adjacent to the sound outlet using the first mounting platform helps improve the reliability of the loudspeaker.

[0013] In one embodiment, the first mounting platform includes a first mounting part and a first pad part fixedly connected together. The first mounting part is fixedly connected to the diaphragm. The first pad part extends toward the direction of the sound outlet. The height of the top surface of the first pad part away from the first inner bottom wall from the first inner bottom wall increases from the end of the first pad part away from the sound outlet toward the end of the first pad part adjacent to the sound outlet, which is beneficial to improving the connection stability between the housing and the diaphragm.

[0014] In one embodiment, the inner sidewall is further provided with a retaining platform arranged in a stepped manner with the first mounting platform. The height of the first mounting platform from the first inner bottom wall is less than the height of the retaining platform from the first inner bottom wall. The first mounting platform is arranged around the folded ring, and the retaining platform is arranged around and fixedly connected to the sound-generating unit. Since the sound-generating unit is fixedly connected to the inner sidewall through the first mounting platform and the retaining platform, the connection stability between the sound-generating unit and the housing is further enhanced, thereby further improving the reliability of the loudspeaker.

[0015] In one embodiment, the housing further includes a plurality of limiting protrusions, which are spaced apart and protrude from the side of the first mounting platform away from the first inner bottom wall, and are fixedly connected to the blocking platform. The limiting protrusions abut against the sound-emitting unit, thereby reducing the possibility of the sound-emitting unit loosening and shaking, which is beneficial to improving the sound quality of the speaker.

[0016] In one embodiment, each pair of adjacent limiting protrusions together with the blocking platform form a glue-applying groove for dispensing glue, which reduces the possibility of glue overflow and achieves a sealed connection between the sound-generating unit and the housing, thereby improving the speaker's waterproofness and airtightness.

[0017] In one embodiment, the housing includes a first outer shell and a second outer shell, which together form the receiving space. The first outer shell has a first inner bottom wall and an inner side wall fixedly connected to the first inner bottom wall. The second outer shell is fixedly connected to the inner side wall at the end away from the first inner bottom wall, which facilitates the assembly of the speaker.

[0018] In one embodiment, the second housing includes a second inner bottom wall and a second mounting platform protruding from the second inner bottom wall. The second mounting platform is fixedly connected to the side of the sound-emitting unit away from the first inner bottom wall, which helps to increase the rear cavity area formed by the sound-emitting unit and the housing, thereby improving the sound effect of the loudspeaker.

[0019] In one embodiment, the second mounting platform includes a mounting portion and a second pad portion fixedly connected. The mounting portion is fixedly connected to the side of the sound-generating unit away from the diaphragm. The top surface of the second pad portion away from the second inner bottom wall is fitted against the side of the sound-generating unit away from the diaphragm. The height of the top surface of the second pad portion away from the second inner bottom wall decreases from the end of the second pad portion away from the sound outlet toward the end of the second pad portion adjacent to the sound outlet, thereby ensuring that the sound-generating unit is stably housed within the first outer casing and reducing the possibility of the sound-generating unit loosening or shaking.

[0020] In one embodiment, the first housing includes a body and a support plate. One end of the body is fixedly connected to the second housing. A through hole is provided at the end of the body away from the second housing. The support plate is fixedly connected to the body and covers the through hole. The support plate is disposed opposite to the diaphragm. The first inner bottom wall includes an inner bottom wall with the support plate facing the diaphragm. The strength of the support plate is greater than the strength of the body. Because the strength of the support plate is greater than that of the body, it can enhance the strength of the housing, save space in the speaker, and facilitate heat dissipation of the sound-generating unit.

[0021] In one embodiment, the loudspeaker further includes a flexible member sandwiched between the side of the second housing facing the sound-emitting unit and the sound-emitting unit. The flexible member prevents loosening between the sound-emitting unit and the second housing, thereby improving the reliability of the loudspeaker.

[0022] In one embodiment, the inner sidewall of the first housing is a first inner sidewall, and the second housing further includes a second inner sidewall formed by bending and extending the edge of the second inner bottom wall. The second inner sidewall is fixedly connected to the end of the first inner sidewall away from the first inner bottom wall. The second inner sidewall and the first inner sidewall together constitute the inner sidewall of the housing, and the sound outlet is disposed on at least one of the second inner sidewall and the first inner sidewall.

[0023] In one embodiment, the second inner bottom wall has a through hole, and the second outer shell further includes a second mounting platform disposed from the second inner bottom wall toward the sound-emitting unit. The second mounting platform is disposed around the through hole of the second outer shell, and the side of the second mounting platform away from the second inner bottom wall is bonded to the side of the sound-emitting unit away from the first inner bottom wall by an adhesive, thereby achieving a sealed connection between the sound-emitting unit and the second outer shell. Furthermore, the through hole in the second inner bottom wall facilitates heat dissipation for the speaker.

[0024] In one embodiment, the diaphragm includes a body and a dome. The body has a through hole and includes a first connecting portion, a folded ring, and a second connecting portion. The folded ring is fixedly connected between the first connecting portion and the second connecting portion. The first connecting portion surrounds the folded ring, the folded ring surrounds the second connecting portion, and the second connecting portion surrounds the through hole. The first connecting portion is fixedly connected to the top surface of the first mounting platform away from the first inner bottom wall. The dome is fixedly connected to the second connecting portion of the body and is disposed facing the first inner bottom wall and covers the through hole.

[0025] Secondly, embodiments of this application also provide a terminal, including a speaker and a processor as described above, wherein the processor is electrically connected to the speaker.

[0026] In one embodiment, the terminal is one of a smartphone, smartwatch, tablet computer, personal digital assistant, point-of-sale terminal, in-vehicle computer, desktop computer, laptop computer, smart TV, and game console. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a loudspeaker in the prior art;

[0028] Figure 2 for Figure 1 The diagram shown is a simulation diagram of airflow noise from a loudspeaker.

[0029] Figure 3 for Figure 1 The diagram shows a simulation of the airflow velocity field of the loudspeaker.

[0030] Figure 4 for Figure 1The diagram shows the front cavity channel of the loudspeaker;

[0031] Figure 5 A structural block diagram of the terminal provided in the first embodiment of this application;

[0032] Figure 6 This is a schematic diagram of an application scenario for a terminal.

[0033] Figure 7 A three-dimensional assembly diagram of the loudspeaker provided in the first embodiment of this application;

[0034] Figure 8 for Figure 7 The speaker shown is a perspective sectional view along line II;

[0035] Figure 9 This is a schematic diagram of the anterior cavity channel;

[0036] Figure 10 A simulation diagram of the airflow velocity field of the loudspeaker provided in the first embodiment of this application;

[0037] Figure 11 Another simulation diagram of the airflow velocity field of the loudspeaker provided in the first embodiment of this application;

[0038] Figure 12 for Figure 7 The above is a three-dimensional exploded view of the loudspeaker;

[0039] Figure 13 This is a top view of the first outer shell;

[0040] Figure 14 for Figure 7 The speaker shown is a perspective sectional view along line II-II.

[0041] Figure 15 A three-dimensional assembly diagram of the speaker section structure;

[0042] Figure 16 for Figure 7 A three-dimensional exploded view of the speaker from another perspective;

[0043] Figure 17 A perspective cross-sectional view of the sound-generating unit of the loudspeaker provided in the first embodiment of this application;

[0044] Figure 18 for Figure 17 The diagram shows a three-dimensional exploded view of the speaker's sound-producing unit.

[0045] Figure 19 A three-dimensional assembly diagram of a loudspeaker provided for the second embodiment of this application;

[0046] Figure 20 for Figure 19 The diagram shown is a three-dimensional exploded view of the loudspeaker.

[0047] Figure 21 A perspective cross-sectional view of the sound-generating unit of the loudspeaker provided in the second embodiment of this application;

[0048] Figure 22 for Figure 19 The diagram shows a three-dimensional exploded view of the speaker's sound-producing unit.

[0049] Figure 23 A three-dimensional assembly diagram of a loudspeaker provided for the third embodiment of this application;

[0050] Figure 24 for Figure 23 The diagram shown is a three-dimensional exploded view of the loudspeaker.

[0051] Figure 25 for Figure 23 A cross-sectional view of the speaker shown;

[0052] Figure 26 A cross-sectional view of a loudspeaker provided in the fourth embodiment of this application;

[0053] Figure 27 This is a cross-sectional view of a loudspeaker provided in the fifth embodiment of this application. Detailed Implementation

[0054] First Implementation Method

[0055] Please see Figure 5 , Figure 5 This is a structural block diagram of a terminal provided in the first embodiment of this application. The terminal 200 includes a speaker 100, a processor 201, a communication bus 203, at least one communication interface 205, and a memory 206. The processor 201 is used to control the speaker 100 to play sound. The processor 201 is communicatively connected to the speaker 100, the at least one communication interface 205, and the memory 206 via the communication bus 203. The terminal 200 can be any of a variety of consumer electronic devices that can be easily held in the user's hand during normal use, or it can be a non-portable electronic device. Specifically, the terminal 200 can be an electronic device equipped with a speaker, such as a cellular phone, media player, smartphone, smartwatch, tablet computer, personal digital assistant (PDA), desktop computer, television, etc.

[0056] Processor 201 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. Processor 201 is the control center of terminal 200, connecting all parts of terminal 200 via various interfaces and lines. Communication bus 203 may include a path for transmitting information between the aforementioned components.

[0057] Communication interface 205 is for use with any transceiver or similar device to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.

[0058] The memory 206 can be used to store computer programs and / or modules. The processor 201 implements various functions of the terminal 200 by running or executing the computer programs and / or modules stored in the memory 206 and by calling the data stored in the memory 206. The memory 206 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for multiple functions (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the terminal 200 (such as audio data, phone book, etc.). In addition, the memory 206 may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, multiple disk storage devices, flash memory devices, or other volatile solid-state storage devices. The memory 206 may exist independently and be connected to the processor 201 via the communication bus 203. The memory 206 may also be integrated with the processor 201.

[0059] In a specific implementation, as one example, the terminal 200 may include multiple processors 201, for example... Figure 5CPU0 and CPU1 are mentioned in the text. Each of these processors 201 can be a single-core processor or a multi-core processor. A processor here can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0060] Terminal 200 may also include a camera 207 for capturing images and a display 208 for displaying images. It is understood that the... Figure 5 This is merely an example of terminal 200 and does not constitute a limitation on terminal 200. Terminal 200 may include more than [examples of terminal 200]. Figure 5 The terminal 200 may include more or fewer components, or combinations of certain components, or different components. For example, the terminal 200 may also include input / output devices, network access devices, etc., which are not limited herein.

[0061] In one application scenario, please refer to Figure 6 As shown, terminal 200 is a consumer electronic device such as a smartphone, and speaker 100 can be a hands-free telephone unit in terminal 200. In a scenario where a user uses terminal 200 to make a phone call with a remote user via a wireless communication network, when processor 201 detects a trigger event of the virtual button 209 on the display interface of terminal 200, processor 201 controls speaker 100 to play sound, thereby realizing hands-free calling. Figure 6 The application of terminal 200 is merely exemplary and is not limited thereto. For example, in other embodiments, speaker 100 plays sound when terminal 200 is playing multimedia.

[0062] Please see Figure 7 , Figure 7 This is a three-dimensional assembly diagram of a loudspeaker provided in the first embodiment of this application. The loudspeaker 100 includes a housing 10 and a sound-emitting unit 20. The housing 10 includes a first outer shell 11 and a second outer shell 13 fixedly connected to the first outer shell 11. The first outer shell 11 and the second outer shell 13 together form a receiving space for receiving the sound-emitting unit 20.

[0063] Please see Figure 8 , Figure 8 for Figure 7 The speaker shown is a perspective cross-sectional view along line II. The first housing 11 includes a first inner bottom wall 111 and a first inner side wall 113 fixedly connected to the first inner bottom wall 111. A sound-generating unit 20 is housed within the first housing 11 and fixedly connected to the first inner side wall 113. The sound-generating unit 20 has a diaphragm 21 for vibrating and generating sound. The diaphragm 21 divides the housing space into a front cavity 101 and a rear cavity 102. The first inner bottom wall 111 is located in the front cavity 101 and is aligned with the diaphragm 21 along a first direction (e.g., ...). Figure 7The diaphragms 21 are arranged opposite each other and spaced apart (in the Z direction shown). The diaphragm 21 has a folded ring 2113 protruding towards the front cavity 101. A sound outlet 103 is provided on the first inner wall 113, and the front cavity 101 and the sound outlet 103 are interconnected to form a front cavity channel 105. The diaphragm 21 of the sound-producing unit 20 is inclined relative to the first inner bottom wall 111. The diameter of the end of the front cavity 101 connected to the sound outlet 103 is larger than the diameter of the end of the front cavity 101 furthest from the sound outlet 103.

[0064] Typically, the area enclosed by the side of the diaphragm with the folded ring and the inner wall of the housing is the front cavity region, while the area enclosed by the side of the diaphragm away from the folded ring and the inner wall of the housing is the rear cavity region. The front cavity region is generally used to help control the mid-to-high frequency sound quality of the speaker 100, while the rear cavity region is generally used to help control the low-frequency sound quality of the speaker. In this embodiment, the front cavity 101 gradually increases in cross-sectional area and expands from the end furthest from the sound outlet 103 to the position of the sound outlet 103, making the cross-section of the front cavity 101 approximately trumpet-shaped.

[0065] The vibration of diaphragm 21 drives airflow from front cavity 101 toward sound outlet 103. Please refer to the following: Figure 9 , Figure 9 This is a cross-sectional schematic diagram of the anterior cavity channel. Figure 9 The direction indicated by the middle arrow is the direction of airflow, meaning that the sound waves generated by the vibration of the diaphragm 21 can propagate through the front cavity 101 to the sound outlet 103 for output.

[0066] The sound outlet 103 includes a first hole wall 1031 and a second hole wall 1033 arranged opposite to and generally parallel to each other. The second hole wall 1033 is fixedly connected to the first inner bottom wall 111. The first hole wall 1031 and the second hole wall 1033 are inclined in a second direction away from the first inner bottom wall 111 to guide the airflow direction, i.e., the sound output. Figure 9 As shown, in a cross-section along the first and second directions, the first inner bottom wall 111 of the loudspeaker 100 is located on one side of the extension line of the first hole wall 1031, and the folding ring 2113 is located on the other side of the extension line away from the first inner bottom wall 111. The shortest distance between the folding ring 2113 and the extension line is not less than 0, so as to reduce the influence of the folding ring 2113 on the airflow flowing in the front cavity 101. In this embodiment, the diameter of the front cavity 101 gradually increases from the end of the front cavity 101 away from the sound outlet 103 to the other end of the front cavity 101 connected to the sound outlet 103. The tilt angle of the sound-emitting unit 20 relative to the first inner bottom wall 111 ranges from 0 to 180 degrees.

[0067] The diaphragm 21 is inclined relative to the first inner bottom wall 111. The diameter of the end of the front cavity 101 connected to the sound outlet 103 is larger than the diameter of the end of the front cavity 101 away from the sound outlet 103. In other words, the cross-sectional area of ​​the cavity at the end of the front cavity 101 connected to the sound outlet 103 is larger than the cross-sectional area of ​​the cavity at the end of the front cavity away from the sound outlet 103. This smooths the airflow, reduces the intensity of turbulence, and reduces the intensity of eddies caused by the structural abrupt change in the front cavity structure due to the height of the surround 2113 of the diaphragm 21 on the side adjacent to the sound outlet 103. By reducing the possibility of eddies and turbulence in the front cavity channel, noise generation is reduced, the sound effect of the speaker 100 is improved, and the user experience is enhanced. Please refer to... Figure 10 and Figure 11 The airflow within the front cavity channel 105 is generally stable and smooth, without abrupt noise. By reducing the likelihood of eddies and turbulence in the front cavity channel 105, noise generation is reduced, improving the sound performance of the speaker 100 and enhancing the user experience. The speaker unit 20 is tilted relative to the first inner bottom wall 111 towards the second outer shell 13, which enhances the low-frequency fullness of the diaphragm 21's amplitude, significantly increasing the dynamic range of the sound while maintaining the same loudness. Because the cross-section of the front cavity 101 is approximately a uniformly increasing trumpet-shaped cross-section, the impact of abrupt airflow changes at the sound source is reduced. The speaker 100's amplitude is increased by more than 30% compared to existing technologies, and the airflow velocity on one side of the diaphragm 21 is reduced by 50%, reducing noise and metallic sounds caused by airflow.

[0068] Please see Figure 12 , Figure 12 for Figure 7The diagram shows an exploded perspective view of the loudspeaker. The first inner wall 113 also forms a stepped first mounting platform 115 and a retaining platform 117. The height of the first mounting platform 115 from the first inner bottom wall 111 is less than the height of the retaining platform 117 from the first inner bottom wall 111. The retaining platform 117 surrounds the first mounting platform 115. The first mounting platform 115 surrounds the surround ring 2113, and the retaining platform 117 surrounds the sound-generating unit 20. The first mounting platform 115 has a top surface facing away from the first inner bottom wall 111. The height of the end of the top surface of the first mounting platform 115 adjacent to the sound outlet 103 from the first inner bottom wall 111 is greater than the height of the end of the top surface of the first mounting platform 115 away from the sound outlet 103 from the first inner bottom wall 111. The top surface of the first mounting platform 115 is fixedly connected to the side of the diaphragm 21 facing the first inner bottom wall 111, causing the sound-generating unit 20 to tilt relative to the second direction. The first mounting platform 115 elevates and supports the end of the speaker unit 20 adjacent to the sound outlet 103, which helps improve the reliability of the speaker 100. The side of the blocking platform 117 adjacent to the first mounting platform 115 is bonded to the side of the speaker unit 20 with adhesive, which helps to further improve the connection stability between the first housing 11 and the speaker unit 20.

[0069] Please refer to the following: Figure 13 , Figure 13 The diagram shows a top view of the first housing. The first mounting platform 115 includes two mounting portions 1151 and two first padding portions 1153. Each mounting portion 1151 is fixedly connected between the two first padding portions 1153. One mounting portion 1151 is positioned opposite the sound outlet 103, which is located between the other mounting portion 1151 and the first inner bottom wall 111. The height of the top surface of the first padding portion 1153 away from the first inner bottom wall 111 increases from the end of the first padding portion 1153 away from the sound outlet 103 toward the end adjacent to the sound outlet 103. In this embodiment, the top surface of the first padding portion 1153 away from the first inner bottom wall 111 is an inclined plane that slopes relative to the second direction toward the side where the second housing 13 is located. It is understandable that the top surface of the first padding portion 1153 away from the first inner bottom wall 111 can also be an inclined curved surface that is inclined relative to the second direction toward the side where the second outer shell 13 is located.

[0070] In this embodiment, the first inner bottom wall 111 is generally along the second direction and a third direction perpendicular to the first direction (e.g., Figure 12 It extends within the plane defined by the Y direction (as shown). The front cavity channel 105 extends along the second direction, the mounting portion 1151 extends along the third direction, and the first pad portion 1153 extends along the second direction. Please refer to... Figure 14 , Figure 14 for Figure 7The speaker shown is a three-dimensional cross-sectional view along line II-II. The diaphragm 21 of the sound-generating unit 20 is fitted with the first pad 1153, which helps to improve the connection stability between the housing 10 and the diaphragm 21.

[0071] The sides of the two mounting portions 1151 and the two first padding portions 1153 away from the first inner bottom wall 111 are bonded to the side of the diaphragm 21 facing the first inner bottom wall 111. The side of the retaining platform 117 adjacent to the first mounting platform 115 is bonded to the side of the sound-generating unit 20. The sides of the two mounting portions 1151 and the two first padding portions 1153 away from the first inner bottom wall 111 are bonded to the side of the sound-generating unit 20 facing the first inner bottom wall 111 with sealant, thus achieving a sealed connection between the bottom of the sound-generating unit 20 facing the first inner bottom wall 131 and the first outer shell 13, thereby improving the waterproofness and airtightness of the speaker 100. The side of the retaining platform 117 adjacent to the first mounting platform 115 is fixedly connected to the sound-generating unit 20 with adhesive to enhance the connection stability between the first outer shell 11 and the sound-generating unit 20.

[0072] In one embodiment, when assembling the loudspeaker 100, the top surface of the sound-generating unit 20 facing the bottom of the first inner bottom wall 111, corresponding to the two mounting parts 1151 and the two first padding parts 1153, is coated with sealant to prevent the diaphragm 21 of the sound-generating unit 20 from separating from the first outer shell 11 during the airtightness test, which would cause air leakage. The four sides of the sound-generating unit 20 corresponding to the blocking platform 117 and the first mounting platform 115 are also coated with sealant to prevent gaps in the bottom sealant of the sound-generating unit 20 during the airtightness test, which would affect the airtightness of the loudspeaker 100.

[0073] The first outer casing 11 also includes a plurality of limiting protrusions 119, which are spaced apart and protrude from the top surface of the first mounting platform 115 away from the first inner bottom wall 111. The limiting protrusions 119 are fixedly connected to the retaining platform 117. The limiting protrusions 119 abut against the sound-emitting unit 20, thereby reducing the possibility of the sound-emitting unit 20 loosening and wobbling, which is beneficial to improving the sound quality of the speaker 100. In this embodiment, each mounting part 1151 and each first pad part 1153 are provided with two spaced-apart limiting protrusions 119. Please refer to Figure 15 , Figure 15 This is a three-dimensional assembly diagram of the speaker section. Adhesive grooves 1157 are formed between adjacent limiting protrusions 119 to accommodate adhesive (not shown) for easy dispensing. It is understood that the number of limiting protrusions 119 can be set as needed, and some limiting protrusions 119 can be omitted.

[0074] It is understood that the first outer shell 11 and the sound-generating unit 20 can be connected in a non-sealed manner; the blocking platform 117 and the first mounting platform 115 can be omitted, and the sound-generating unit 20 can be directly obliquely mounted on the first outer shell 11, with the sound-generating unit 20 fixedly connected to the first inner sidewall 113 of the first outer shell 11; or, the first mounting platform 115 can be partially located at the end of the first inner sidewall 113 adjacent to the sound outlet 103, which can raise the end of the sound-generating unit 20 adjacent to the sound outlet 103.

[0075] Please see Figure 16 , Figure 16 for Figure 7 The diagram shows an exploded perspective view of the loudspeaker from another angle. The second housing 13 includes a second inner bottom wall 131 and a second inner side wall 133 formed by bending and extending the edge of the second inner bottom wall 131. The second inner side wall 133 is fixedly connected to the end of the first inner side wall 113 away from the first inner bottom wall 111. The first inner side wall 131 and the second inner side wall 133 form the inner side wall of the housing 10. A through hole 1311 is provided on the second inner bottom wall 131. The second housing 13 also includes a second mounting platform 135 disposed from the second inner bottom wall 131 toward the sound-emitting unit 20. The second mounting platform 135 is disposed around the through hole 1311. The side of the second mounting platform 135 away from the second inner bottom wall 131 is bonded to the side of the sound-emitting unit 20 away from the first inner bottom wall 111 by adhesive, thereby achieving a sealed connection between the sound-emitting unit 20 and the second housing 13.

[0076] The second mounting platform 135 includes two mounting portions 1351 and two second padding portions 1353. Each mounting portion 1351 is fixedly connected between the two second padding portions 1353. The mounting portions 1351 extend in a third direction, and the second padding portions 1353 extend in a second direction. The height of the top surface of the second padding portion 1353 away from the second inner bottom wall 131 decreases from the end of the second padding portion 1353 away from the sound outlet 103 toward the end of the second padding portion 1353 adjacent to the sound outlet 103. In this way, the sound-generating unit 20 can be stably housed in the housing 10, reducing the possibility of the sound-generating unit 20 loosening or shaking.

[0077] It is understood that the second outer shell 13 may be omitted from the shell 10, or the first outer shell 11 and the second outer shell 13 may be manufactured as a single piece; the sound outlet 103 may be opened on the second inner sidewall 133; the first inner sidewall 131 and the second inner sidewall 133 may be spliced ​​to form the inner sidewall of the shell 10, and the sound outlet 103 may be opened on the second inner sidewall 133, or partially opened on the first inner sidewall 111 and partially opened on the second inner sidewall 131. The housing 10 includes a first inner bottom wall and an inner side wall fixedly connected to the first inner bottom wall. A loudspeaker and terminal include a housing with a receiving space and a sound-generating unit fixedly received in the receiving space. The sound-generating unit has a diaphragm for vibrating and generating sound. The housing includes a first inner bottom wall and an inner side wall fixedly connected to the first inner bottom wall. The diaphragm is fixedly connected to the inner side wall to isolate the receiving space into a front cavity and a rear cavity. The first inner bottom wall is located in the front cavity. The first inner bottom wall and the diaphragm are arranged opposite to each other and spaced apart along a first direction. The diaphragm has a folded ring protruding towards the front cavity. The inner side wall has a through-hole for sound emission. The front cavity and the sound emission hole are connected to form a front cavity channel. The sound-generating unit and at least one of the first inner bottom walls are inclined relative to a second direction, and the diameter of the front cavity at the end adjacent to the sound emission hole is larger than the diameter of the other end of the front cavity.

[0078] Please see Figures 17-18 , Figure 17 This is a perspective cross-sectional view of the sound-generating unit of the loudspeaker provided in the first embodiment of this application. Figure 18 for Figure 17 The diagram shows an exploded perspective view of the sound-generating unit. In this embodiment, the diaphragm 21 includes a main body 211 and a dome 213. The main body 211 has a through hole 2111. The main body 211 includes a first connecting portion 2112, a folded ring 2113, and a second connecting portion 2115. The folded ring 2113 is fixedly connected between the first connecting portion 2112 and the second connecting portion 2115. The first connecting portion 2112 surrounds the folded ring 2113, the folded ring 2113 surrounds the second connecting portion 2115, and the second connecting portion 2115 surrounds the through hole 2111. The first connecting portion 2112 is fixedly connected to the top surface of the first mounting platform 115 facing away from the first inner bottom wall 2111. The dome 213 is fixedly connected to the second connecting portion 2115 of the main body 211 and is disposed on the side facing the first inner bottom wall 111, covering the through hole 2111.

[0079] The sound-generating unit 20 also includes a frame 22, a first magnet 25, a coil 26, a second magnet 27, a washer 28, and a ceramic bowl 29. The main body 210 of the diaphragm 21 is fixed to the frame 22 via a first connecting part 2112. The side of the frame 22 is fixedly connected to the mounting platform 117. The first magnet 25, the coil 26, the second magnet 27, and the washer 28 are all housed in the frame 22. The first magnet 25 is housed in the coil 26. The coil 26 is housed in the washer 28. There are four second magnets 27, which are arranged around the coil 26. The washer 28 is located between the folding ring 2113 and the second magnets 27. The ceramic bowl 29 is fixed to the end of the frame 22 away from the diaphragm 21 to prevent the components inside the frame 22 from detaching from the frame 22. The frame 22 and the mounting platform 117 are fixedly connected to the sides adjacent to the first mounting platform 115. The second magnet 27 is located between the washer 28 and the ceramic bowl 29. In this embodiment, there are two coils 26. The first magnet 25, the coil 26, and the second magnet 27 constitute the magnetic circuit system of the sound-generating unit 20, which is used to drive the diaphragm 21 to vibrate and generate sound. It is understood that the number of the first magnet 25 and the second magnet 27 is not limited; the structure of the sound-generating unit 20 is not limited, and the first magnet 25 or the second magnet 27 can be omitted. For example, the washer 28 can be omitted.

[0080] Second Implementation Method

[0081] Please see Figures 19-20 , Figure 19 This is a three-dimensional assembly diagram of a loudspeaker provided in the second embodiment of this application. Figure 20 for Figure 19 The diagram shows an exploded perspective view of the loudspeaker. The loudspeaker 300 provided in the second embodiment has a structure largely the same as the loudspeaker 100 provided in the first embodiment. The loudspeaker 300 includes a housing 30 and a sound-emitting unit 40. The housing 30 includes a first outer shell 31 and a second outer shell 33. The sound-emitting unit 40 is fixedly housed within the first outer shell 31, and the second outer shell 33 covers the opening of the first outer shell 31 and is fixedly connected to it. The sound-emitting unit 40 is inclined towards the second outer shell 33 relative to a second direction. The difference lies in that the first outer shell 31 includes a body 311 and a support plate 313. A through hole 3111 is provided on the bottom wall of the body 311, and the support plate 313 is fixedly connected to the body 311 and covers the through hole 3111. The support plate 313 is disposed opposite to the diaphragm of the sound-emitting unit 40. The support plate 313 and the side of the body 311 facing the sound-emitting unit 20 together constitute the first inner bottom wall of the first outer shell 31. The strength of the support piece 313 is greater than that of the body 311, and the thickness of the support piece 313 is less than the thickness of the sidewall of the body 311.

[0082] In this embodiment, the first outer shell 31 and the second outer shell 33 are made of plastic, and the support plate 313 is made of steel. Typically, the sidewall thickness of the plastic outer shell is not less than 0.4 mm to achieve the required strength and / or rigidity, while the thickness of the steel support plate 313 ranges from 0.15 to 0.2 mm, providing excellent strength and rigidity. In other words, the support plate 313 enhances the strength of the shell 30. Because the support plate 313 is relatively thin, it helps save space in the speaker 300 and facilitates heat dissipation from the driver unit 40. It is understood that the materials of the first outer shell 31, the second outer shell 33, and the support plate 313 are not limited.

[0083] The loudspeaker 300 also includes a flexible member 50, which is sandwiched between the side of the second housing 33 facing the sound-emitting unit 40 and the sound-emitting unit 40. The flexible member 50 is used to prevent loosening between the sound-emitting unit 40 and the second housing 33, thereby improving the reliability of the loudspeaker 300. In this embodiment, the flexible member 50 is a press-fit foam. In other embodiments, the flexible member 50 can be a soft support structure such as an adhesive layer or sponge.

[0084] Please see Figure 21 and Figure 22 , Figure 21 This is a perspective cross-sectional view of the sound-generating unit of the loudspeaker provided in the second embodiment of this application. Figure 22 for Figure 21 The diagram shows a three-dimensional exploded view of the speaker's sound-producing unit.

[0085] In this embodiment, the sound-generating unit 40 further includes a frame 42, a flexible circuit board 44, a first magnet 45, a coil 46, a second magnet 47, a washer 48, and a ceramic bowl 49. A diaphragm 41 is fixed to the frame 42. The diaphragm 41 is positioned facing the support plate 313. The flexible circuit board 44, the first magnet 45, the coil 46, the second magnet 47, and the washer 48 are all housed within the frame 42. The first magnet 45 is housed within the coil 46. The coil 46 is housed within the flexible circuit board 44. The flexible circuit board 44 is electrically connected to the coil 46 to supply power to the coil 46. There are four second magnets 47, arranged around the coil 46. The washer 48 is located between the dome 43 and the first magnet 45. The ceramic bowl 49 is fixed to the end of the frame 42 away from the diaphragm 41 to prevent components within the frame 42 from detaching from the frame 42. The second magnet 47 is located between the flexible circuit board 44 and the ceramic bowl 49. In this embodiment, there are two coils 46. The first magnet 45, the coil 46, and the second magnet 47 constitute the magnetic circuit system of the sound-generating unit 40, which is used to drive the diaphragm 41 to vibrate and generate sound.

[0086] Third Implementation Method

[0087] Please see Figures 23-24 , Figure 23This is a three-dimensional assembly diagram of a loudspeaker provided in the third embodiment of this application. Figure 24 for Figure 23 The diagram shows an exploded perspective view of the loudspeaker. The loudspeaker 400 provided in the third embodiment has a structure that is substantially the same as the loudspeaker 100 provided in the first embodiment. The loudspeaker 400 includes a housing 50 and a sound-emitting unit 60 fixedly housed within the housing 50. The housing 50 includes a first outer shell 51 and a second outer shell 53. The sound-emitting unit 60 is fixedly housed within the first outer shell 51, and the second outer shell 53 covers the opening end of the first outer shell 51 and is fixedly connected to the first outer shell 51.

[0088] The difference lies in that the second outer shell 53 is roughly flat, and the second outer shell 53 is fixedly connected to the sound-generating unit 60; please refer to the following reference. Figure 25 In the direction perpendicular to the first inner bottom wall 111, the diameter of the sound outlet 403 gradually increases from the end adjacent to the front cavity 401 to the other end of the sound outlet 403, so that the diameter of the front cavity channel 405 increases from the end of the front cavity 401 away from the sound outlet 403 to the end of the sound outlet 403 away from the front cavity 401. That is, the front cavity channel 405 is roughly trumpet-shaped, which increases the space at the connection between the sound outlet 403 and the front cavity 101, which can smooth the airflow, reduce the intensity of turbulence and the generation of noise, and further improve the sound effect of the speaker 400. The first hole wall 4031 of the sound outlet 403 and the first inner bottom wall 511 of the first outer shell 51 are located on the same plane, which reduces the abrupt structure between the front cavity 401 and the sound outlet 403, thereby reducing the eddies and noise generation in the front cavity channel 405 and improving the sound effect of the speaker 400.

[0089] Fourth Implementation Method

[0090] Please see Figure 26 , Figure 26 This is a cross-sectional view of a loudspeaker provided in the fourth embodiment of this application. The loudspeaker 500 provided in the fourth embodiment has a structure that is substantially the same as the loudspeaker 300 provided in the third embodiment. The loudspeaker 500 includes a housing 71 and a sound-emitting unit 73 fixedly housed within the housing 71. The housing 71 includes a first outer shell 711 and a second outer shell 713. The sound-emitting unit 73 is fixedly housed within the first outer shell 711, and the second outer shell 713 covers the opening end of the first outer shell 711 and is fixedly connected to the first outer shell 711. The front cavity 501 is along a second direction (e.g., Figure 26 The sound-emitting unit 73 extends in the X direction and is arranged along the second direction. The difference is that the first inner bottom wall 7111 is inclined relative to the second direction in the direction away from the second outer shell 713, and the sound-emitting unit 73 is still inclined relative to the first inner bottom wall 7111.

[0091] Fifth Implementation Method

[0092] Please see Figure 27 , Figure 27 This is a cross-sectional view of a loudspeaker according to a fifth embodiment of this application. The loudspeaker 500 provided in the fifth embodiment has a structure substantially the same as the loudspeaker 300 provided in the third embodiment. The loudspeaker 500 includes a housing 75 and a sound-emitting unit 77 fixedly housed within the housing 75. The housing 75 includes a first outer shell 751 and a second outer shell 753. The sound-emitting unit 77 is fixedly housed within the first outer shell 751, and the second outer shell 753 covers the opening end of the first outer shell 751 and is fixedly connected to the first outer shell 751. The front cavity 501 is along a second direction (e.g., Figure 27 The sound-emitting unit 77 is inclined relative to the second direction toward the side where the second outer shell 753 is located, while the first inner bottom wall 7511 is inclined relative to the second direction toward the direction away from the second outer shell 753. The sound-emitting unit 77 is still inclined relative to the first inner bottom wall 7511.

[0093] In summary, a loudspeaker includes a housing with a receiving space and a sound-generating unit fixed within the receiving space. The sound-generating unit has a diaphragm for vibrating and generating sound. The housing includes a first inner bottom wall and an inner side wall fixedly connected to the first inner bottom wall. The diaphragm is fixedly connected to the inner side wall to isolate the receiving space into a front cavity and a rear cavity. The first inner bottom wall is located in the front cavity. The inner side wall has a through-hole for sound emission. The front cavity communicates with the sound emission hole to form a front cavity channel. The diaphragm is inclined relative to the first inner bottom wall. In a direction perpendicular to the first inner bottom wall, the diameter of the end of the front cavity connected to the sound emission hole is larger than the diameter of the end of the front cavity away from the sound emission hole.

[0094] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A loudspeaker, characterized by The sound production unit is fixed in the accommodating space of the shell, and the sound production unit has a diaphragm for vibrating to produce sound. The shell includes a first inner bottom wall and an inner side wall fixedly connected with the first inner bottom wall. The diaphragm is fixedly connected with the inner side wall to separate the accommodating space into a front cavity and a rear cavity. The first inner bottom wall is located in the front cavity, and the inner side wall is provided with a sound hole. The front cavity and the sound hole are connected to form a front cavity passage. The diaphragm is arranged obliquely relative to the first inner bottom wall. The diameter of the front cavity at one end connected with the sound hole is larger than the diameter of the front cavity at the other end away from the sound hole. The diameter of the sound hole gradually increases from the end of the sound hole adjacent to the front cavity to the other end of the sound hole. The diameter of the front cavity passage gradually increases from the end of the front cavity away from the sound hole to the end of the sound hole away from the front cavity. The hole wall of the sound hole includes oppositely arranged first hole wall and second hole wall. The first hole wall is fixedly connected with the first inner bottom wall, and the first hole wall of the sound hole and the first inner bottom wall are located on the same plane.

2. The loudspeaker of claim 1, wherein, The diaphragm has a folded ring protruding towards the front cavity. The first inner bottom wall is located on one side of the extension line of the first hole wall, and the folded ring is located on the other side of the extension line away from the first inner bottom wall. The shortest distance between the folded ring and the extension line is not less than 0.

3. The loudspeaker of claim 1, wherein, The inner side wall is provided with a first installation table fixedly connected with the sound production unit.

4. The loudspeaker of claim 3, wherein, The first installation table includes a first installation part and a first gasket part fixedly connected with each other. The first installation part is fixedly connected with the diaphragm. The first gasket part is arranged to extend towards the direction of the sound hole. The height of the top surface of the first gasket part away from the first inner bottom wall is greater than the height of the first inner bottom wall. The height of the first gasket part gradually increases from one end of the first gasket part away from the sound hole to the other end of the first gasket part adjacent to the sound hole.

5. The loudspeaker of claim 3, wherein, The inner side wall is further provided with a blocking table arranged in steps with the first installation table. The height of the first installation table away from the first inner bottom wall is smaller than the height of the blocking table away from the first inner bottom wall. The blocking table is arranged around the sound production unit and is fixedly connected.

6. The loudspeaker of claim 5, wherein, The shell further includes a plurality of limiting protrusions. The plurality of limiting protrusions are arranged in intervals on the side of the first installation table away from the first inner bottom wall and are fixedly connected with the blocking table. The limiting protrusions abut against the sound production unit.

7. The loudspeaker of claim 6, wherein, Every two adjacent limiting protrusions and the blocking table jointly form a glue injection groove.

8. The loudspeaker of claim 1, wherein, The shell includes a first shell and a second shell. The first shell and the second shell jointly form the accommodating space. The first shell has the first inner bottom wall and the inner side wall fixedly connected with the first inner bottom wall. The second shell is fixedly connected with the inner side wall away from the first inner bottom wall.

9. The loudspeaker of claim 8, wherein, The second shell includes a second inner bottom wall and a second installation table protruding on the second inner bottom wall. The second installation table is fixedly connected with the side of the sound production unit away from the first inner bottom wall.

10. The loudspeaker of claim 9, wherein, The second mounting platform comprises a fixedly connected mounting portion and a second gasket portion, the mounting portion is fixedly connected with the sound production unit away from the diaphragm, and the second gasket portion is arranged in close contact with the sound production unit away from the diaphragm on the top surface of the second inner bottom wall, the height of the top surface of the second gasket portion away from the second inner bottom wall is gradually reduced from one end of the second gasket portion away from the sound hole to the other end of the second gasket portion adjacent to the sound hole.

11. The loudspeaker of claim 8, wherein, The first shell comprises a body and a support sheet, one end of the body is fixedly connected with the second shell, the other end of the body away from the second shell is provided with a through hole, the support sheet is fixedly connected with the body and covers the through hole, the support sheet is arranged opposite to the diaphragm, and the first inner bottom wall comprises an inner bottom wall of the support sheet arranged towards the diaphragm.

12. The loudspeaker of claim 8, wherein, The loudspeaker further comprises a flexible piece, the flexible piece is clamped between one side of the second shell towards the sound production unit and the sound production unit.

13. A terminal, characterized by The terminal comprises the loudspeaker and a processor, and the processor is electrically connected with the loudspeaker.

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