Sound generation device and electronic apparatus

Abstract

Provided in the present application are a sound generation device and an electronic apparatus. The sound generation device comprises a housing, a loudspeaker and a tubular channel. The housing has an internal space. The loudspeaker and the tubular channel are both mounted in the internal space. One end of the tubular channel is located in the internal space, and the other end thereof is fixedly connected to the housing. The tubular channel communicates the internal space of the housing with the external space of the housing. The tubular channel comprises a first tubular body, a second tubular body and first fin-shaped structures, wherein the first tubular body is fixedly connected to one end of the second tubular body; the first tubular body has a first inner side surface; the first fin-shaped structures are fixedly connected to the first inner side surface; each first fin-shaped structure comprises a first surface arranged facing away from the first inner side surface; the second tubular body has a second inner side surface; and in the height direction of the first fin-shaped structures, the distance between the portion of each first surface close to the second tubular body and the central axis of the second tubular body is greater than or equal to the distance between the portion of the second inner side surface close to the first tubular body and the central axis of the second tubular body. The sound generation device of the present application features small airflow noises and a good sound-producing effect.

Description

Sound-generating devices and electronic devices

[0001] This application claims priority to Chinese Patent Application No. 202422080557.2, filed with the China National Intellectual Property Administration on August 26, 2024, entitled "Sound Generating Device and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of loudspeakers, and more particularly to a sound-generating device and electronic device. Background Technology

[0003] Current sound-generating devices typically have internal ducts connecting their internal and external spaces. These ducts can act as bass reflex ports to improve the low-frequency performance of the device. However, when the device operates at high power, the airflow velocity and pressure inside the duct are high in the low-frequency range. At the duct opening, due to the pressure drop, the high-pressure air at the opening flows rapidly towards the lower-pressure outer area, creating an outward-swirling airflow. This swirling airflow, at high velocities, generates airflow noise, negatively impacting the sound output of the device. Summary of the Invention

[0004] This application provides a sound-generating device and an electronic device including the sound-generating device, aiming to provide a sound-generating device and electronic device with low airflow noise and good sound output effect.

[0005] In a first aspect, a sound-generating device is provided. The sound-generating device includes a housing, a loudspeaker, and a conduit. The housing has an internal space, and both the loudspeaker and the conduit are installed within the internal space. The loudspeaker is fixedly connected to the housing. The loudspeaker is used to emit sound into the external space of the housing. One end of the conduit is located in the internal space, and the other end of the conduit is fixedly connected to the housing. The conduit connects the internal space of the housing to the external space of the housing. The conduit includes a first tube body, a second tube body, and a first sheet-like structure. The first tube body is fixedly connected to one end of the second tube body. The first tube body has a first inner surface. The first sheet-like structure is located inside the first tube body and is fixedly connected to the first inner surface. The first sheet-like structure includes a first surface disposed opposite to the first inner surface. The second tube body has a second inner surface. In the height direction of the first sheet-like structure, the distance between the portion of the first surface near the second tube body and the central axis of the second tube body is greater than or equal to the distance between the portion of the second inner surface near the first tube body and the central axis of the second tube body.

[0006] Understandably, compared to the pipes in a typical sound-generating device, the air inside the pipe has a higher velocity and pressure at low frequencies when the device is operating, while the external air pressure is relatively low. This causes the high-pressure air at the pipe opening to flow rapidly towards the surrounding low-pressure area due to the pressure drop. This creates an outward-rotating airflow outside the pipe opening, generating airflow noise and resulting in poor sound output from the device. In this embodiment, the pipe of the sound-generating device can include a first tube body and at least one first plate-like structure. The first plate-like structure can be fixed to the first inner surface of the first tube body. Thus, when the device is operating, the first plate-like structure increases the contact area between the airflow and the pipe body, increasing the viscous resistance and slowing the airflow velocity within the tube body. This reduces the airflow noise generated by the high-speed rotating airflow at the pipe opening, thereby improving the sound output of the device.

[0007] Secondly, compared to the pipes of typical sound-generating devices, which have a sheet-like structure on their inner side that occupies a significant amount of internal space and reduces airflow, resulting in poor low-frequency performance, the pipes of the sound-generating device in this embodiment can include a first pipe and a second pipe connected in sequence. The first pipe can have a first sheet-like structure fixed to its inner side, while the second pipe may not have such a structure. Thus, when the sound-generating device is operating, the first sheet-like structure effectively reduces the airflow velocity within the first pipe, thereby reducing airflow noise generated by high-speed rotation at the first end of the pipe. Simultaneously, the absence of a sheet-like structure in the second pipe increases airflow within it, thus increasing the overall airflow throughout the pipe. This improves the pipe's ability to enhance low-frequency sound quality and overall low-frequency performance. In other words, the pipes of the sound-generating device in this embodiment can reduce turbulence noise while maintaining low-frequency performance, improving the user experience.

[0008] Furthermore, in this embodiment, the first sheet-like structure has a first surface facing away from the first inner side. The distance between the portion of the first surface near the second tube and the central axis of the second tube can be greater than or equal to the distance between the second inner side and the central axis of the second tube. Thus, when the distance between the portion of the first surface near the second tube and the central axis of the second tube is equal to the distance between the portion of the second inner side near the first tube and the central axis of the second tube, the portion of the first surface near the second tube is flush with the portion of the second inner side near the first tube. At this time, the transition between the second inner side and the first surface is relatively smooth, thereby avoiding noise generated inside the pipe due to a step difference between the second inner side and the first surface, which would affect the sound output effect of the sound-generating device. When the distance between the portion of the first surface near the second tube and the central axis of the second tube is greater than the distance between the portion of the second inner side near the first tube and the central axis of the second tube, the size of the first tube can be increased while keeping the size of the second tube unchanged. This increases the airflow in the first tube, thereby increasing the airflow throughout the entire pipe, which is beneficial for improving the low-frequency sound quality of the sound-generating device and enhancing its low-frequency performance.

[0009] In one possible implementation, the portion of the first surface near the second tube body is flush with the portion of the first inner surface near the second tube body. This results in a smoother transition between the first inner surface and the first surface, preventing turbulence and noise generated inside the pipe due to the step difference between the first inner surface and the first surface, thus avoiding any impact on the sound output of the sound-generating device.

[0010] In one possible implementation, the portion of the first inner side near the second tube body is flush with the portion of the second inner side near the first tube body. This results in a smoother transition between the first and second inner sides, and consequently, a smoother transition between the first and second tube bodies. This avoids noise generated inside the pipe due to turbulence caused by the step difference between the first and second inner sides, thus preventing noise from affecting the sound output of the sound-generating device.

[0011] In one possible implementation, the first tube has a first end face and a second end face. The first end face faces away from the second tube. The second end face is fixedly connected to the second tube. Both the first and second end faces are annular. The area enclosed by the first end face is a first area, and the area enclosed by the second end face is a second area. The first area is greater than or equal to the second area. Thus, when the first area is greater than the second area, the air velocity when flowing through the first end face is less than the air velocity when flowing through the second end face. That is, the pipe in this embodiment can slow down the air velocity when flowing through the first end face, thereby reducing the airflow noise generated by the high-speed rotating airflow at the pipe opening, and thus improving the sound output effect of the sound-generating device. When the first area is equal to the second area, the first tube can be approximately cylindrical, which is easy to manufacture.

[0012] In one possible implementation, the second tube has a third end face. The second end face of the first tube is fixedly connected to the third end face of the second tube. The third end face is annular. The area enclosed by the third end face is the third area. The second area of ​​the first tube is greater than or equal to the third area of ​​the second tube. Thus, when the second area is greater than the third area, the internal space of the first tube can be increased without changing the size of the second pipe, thereby increasing the airflow of the first tube and the pipe, which is beneficial for improving the low-frequency sound quality of the sound-generating device and enhancing its low-frequency performance. When the second area is equal to the third area, the portion of the first inner side near the second tube is flush with the portion of the second inner side near the first tube. The transition between the first and second inner sides is relatively smooth, making the transition between the first and second tubes smooth as well. This avoids noise caused by turbulence inside the pipe due to a step difference between the first and second inner sides, thus preventing noise from affecting the sound output of the sound-generating device.

[0013] In one possible implementation, there are multiple first sheet-like structures, which are spaced apart along the circumferential direction of the first tube. A first gap exists between adjacent first sheet-like structures, and the width of the first gap decreases along the direction toward the central axis of the first tube.

[0014] It is understood that the width of the first gap formed between two adjacent first sheet-like structures in this embodiment can decrease along the length extension direction of the first pipe body towards the central axis of the pipe. Thus, when the pipe size and the size of the first sheet-like structures are the same, when air flows through the first pipe body, the contact area between the air near the first inner surface of the first pipe body and the pipe is larger. This effectively slows down the airflow velocity near the first inner surface of the first pipe body, thereby reducing airflow noise generated by high-speed rotation at the first end of the pipe, and thus improving the sound output effect of the sound-generating device.

[0015] In one possible implementation, the width of the first gap decreases along the direction from the first end face toward the second end face. Thus, the area enclosed by the two adjacent first sheet-like structures and the first inner side increases along the direction from the second end face toward the first end face. When the sound-generating device is operating, the first sheet-like structure in this embodiment can increase the contact area between the airflow and the pipe as it flows past the first end face, thereby increasing the viscous resistance of the airflow through the first pipe body, slowing down the airflow velocity within the first pipe body, and thus reducing the airflow noise generated by the high-speed rotating airflow at the pipe opening, thereby improving the sound output effect of the sound-generating device.

[0016] In one possible implementation, the height of the first sheet-like structure decreases along the direction from the first end face to the second end face. Thus, the area enclosed by two adjacent first sheet-like structures and the first inner side increases along the direction from the second end face to the first end face. When the sound-generating device is operating, the first sheet-like structure in this embodiment can increase the contact area between the airflow and the pipe as it flows through the first end face, thereby increasing the viscous resistance of the airflow through the first pipe body, slowing down the airflow velocity within the first pipe body, and thus reducing the airflow noise generated by the high-speed rotating airflow at the pipe opening, thereby improving the sound output effect of the sound-generating device.

[0017] In one possible implementation, the first tube further includes a first mounting groove. The opening of the first mounting groove is formed on a first inner surface and a second end face of the first tube. At least a portion of the second tube is located within the first mounting groove. Thus, when the second tube is assembled with the first tube, a portion of the second tube can be located within the first mounting groove, preventing interference from the external environment at the connection point between the first and second tubes. This makes the connection between the first and second tubes more reliable, thereby extending the service life of the pipe and, consequently, the service life of the sound-generating device.

[0018] In one possible implementation, the first sheet-like structure and the first tube are integrally formed. This reduces the difficulty of manufacturing the first sheet-like structure and the first tube, lowers the processing cost of the pipe, and consequently reduces the processing cost of the sound-generating device.

[0019] In one possible implementation, the conduit further includes a third pipe body. The second pipe body is fixedly connected between the third pipe body and the first pipe body. The pipe body also includes a second sheet-like structure. The third pipe body has a third inner surface. The second sheet-like structure is located inside the third pipe body and is fixedly connected to the third inner surface.

[0020] It is understood that both ends of the tube in this embodiment (i.e., the first and third tubes) can be provided with plate-like structures. When the sound-generating device is working, as the air inside the housing flows through the pipe to the outside of the housing, the first and second plate-like structures can increase the contact area between the air and the first and third tubes. This increases the viscous resistance of the air flowing through the first and third tubes, slows down the airflow speed within them, and thus reduces airflow noise at both ends of the pipe, improving the sound output of the sound-generating device. Simultaneously, the second tube does not have plate-like structures, thereby increasing the airflow within it and the overall airflow throughout the pipe. This enhances the pipe's ability to improve the low-frequency sound quality of the sound-generating device, further improving its overall sound output.

[0021] In one possible implementation, the second sheet-like structure has a second surface facing away from the third inner surface. In the height direction of the second sheet-like structure, the distance between the portion of the second surface near the second tube body and the central axis of the second tube body is greater than or equal to the distance between the portion of the second inner surface near the third tube body and the central axis of the second tube body. Thus, when the distance between the portion of the second surface near the second tube body and the central axis of the second tube body is equal to the distance between the portion of the second inner surface near the third tube body and the central axis of the second tube body, the transition between the second inner surface and the second surface is smoother. This avoids noise generated inside the pipe due to turbulence caused by a step difference between the second inner surface and the second surface, thus affecting the sound output performance of the sound-generating device. When the distance between the portion of the second surface near the second tube body and the central axis of the second tube body is greater than the distance between the portion of the second inner surface near the third tube body and the central axis of the second tube body, the size of the third tube body can be increased while keeping the size of the second tube body unchanged. This increases the airflow in the third tube body, and consequently, the airflow in the entire pipe, which is beneficial for improving the low-frequency sound quality of the sound-generating device and enhancing its low-frequency performance.

[0022] In one possible implementation, the portion of the second surface near the second tube body is flush with the portion of the third inner surface near the second tube body. This results in a smoother transition between the third inner surface and the second surface, thus preventing noise generated inside the pipe due to turbulence caused by a step difference between the third inner surface and the second surface, which would affect the sound output of the device.

[0023] In one possible implementation, the portion of the third inner surface near the second tube body is flush with the portion of the second inner surface near the third tube body. This results in a smoother transition between the second and third inner surfaces, and between the second and third tube bodies. This avoids noise generated inside the pipe due to turbulence caused by the step difference between the second and third inner surfaces, thus preventing noise from affecting the sound output of the sound-generating device.

[0024] In one possible implementation, the second tube has a fourth end face, and the third tube has a fifth end face, with the fourth end face fixedly connected to the fifth end face. Both the fourth and fifth end faces are annular, with the area enclosed by the fourth end face being the fourth area and the area enclosed by the fifth end face being the fifth area, where the fifth area is greater than or equal to the fourth area. Thus, when the fourth area is greater than the fifth area, the internal space of the third tube can be increased without altering the size of the second tube, thereby increasing the airflow through the third tube and consequently the overall airflow through the tube. This improves the low-frequency sound quality of the sound-generating device and enhances its low-frequency performance. When the fourth area equals the fifth area, the portion of the third inner surface near the second tube is flush with the portion of the second inner surface near the third tube. This smooth transition between the third and second inner surfaces prevents turbulence and noise buildup caused by a step difference between the two inner surfaces, thus avoiding any negative impact on the sound output of the device.

[0025] In one possible implementation, there are multiple second sheet-like structures, which are spaced apart along the circumferential direction of the third tube. There is a second gap between two adjacent second sheet-like structures, and the width of the second gap decreases along the direction toward the central axis of the third tube.

[0026] It is understood that the width of the second gap formed between two adjacent second plate-like structures of the pipe in this embodiment can decrease along the length extension direction of the third pipe body towards the central axis of the pipe. Thus, when the pipe size and the size of the second plate-like structures are the same, when air flows through the third pipe body, the contact area between the air near the third inner surface of the third pipe body and the pipe is larger. This effectively slows down the airflow velocity near the third inner surface of the third pipe body, thereby reducing the airflow noise generated by the high-speed rotating airflow at the third end of the pipe, and thus improving the sound output effect of the sound-generating device.

[0027] In one possible implementation, the third tube has a sixth end face, which is positioned away from the second tube. Each sixth end face is annular, and the area enclosed by the sixth end face is the sixth area, which is greater than or equal to the fifth area. Thus, when the sixth area is greater than the fifth area, the air velocity passing through the sixth end face is less than the air velocity passing through the fifth end face. That is, the pipe in this embodiment can reduce the air velocity passing through the sixth end face, thereby reducing airflow noise generated by high-speed rotation at the pipe opening, and thus improving the sound output effect of the sound-generating device. When the sixth area is equal to the fifth area, the third tube can be approximately cylindrical, making it easy to manufacture.

[0028] In one possible implementation, there are multiple second sheet-like structures, spaced apart along the circumferential direction of the third tube. A second gap exists between adjacent second sheet-like structures, and the width of the second gap decreases from the sixth end face towards the fifth end face. Thus, the area enclosed by two adjacent second sheet-like structures and the second inner surface increases from the fifth end face towards the sixth end face. When the sound-generating device is operating, the second sheet-like structures in this embodiment can increase the contact area between the airflow and the pipe as it flows through the sixth end face, thereby increasing the viscous resistance of the airflow through the third tube, slowing down the airflow velocity within the third tube, and thus reducing the airflow noise generated by the high-speed rotating airflow at the pipe opening, thereby improving the sound output effect of the sound-generating device.

[0029] In one possible implementation, the height of the second sheet-like structure in the radial direction of the third tube decreases along the direction from the sixth end face towards the fifth end face. Thus, the area enclosed by two adjacent second sheet-like structures and the second inner surface increases along the direction from the fifth end face towards the sixth end face. When the sound-generating device is operating, the second sheet-like structure in this embodiment can increase the contact area between the airflow and the pipe as it flows through the sixth end face, thereby increasing the viscous resistance of the airflow through the third tube, slowing down the airflow velocity within the third tube, and thus reducing the airflow noise generated by the high-speed rotating airflow at the pipe opening, thereby improving the sound output effect of the sound-generating device.

[0030] In one possible implementation, the third tube further includes a second mounting groove formed on the fifth end face of the third tube, with at least a portion of the second tube located within the second mounting groove. This allows a portion of the second tube to be positioned within the third mounting groove during assembly with the first tube, preventing interference from the external environment at the connection point between the second and third tubes. This makes the connection between the second and third tubes more reliable, thereby extending the service life of the pipe and, consequently, the service life of the sound-generating device.

[0031] In one possible implementation, the second sheet structure and the third tube are integrally formed. This reduces the difficulty of manufacturing the third sheet structure and the third tube, lowers the processing cost of the pipe, and consequently reduces the processing cost of the sound-generating device.

[0032] In one possible implementation, the length of the first tube is greater than the length of the third tube. It is understood that compared to a typical pipe consisting of a first and third tube of equal length, when the pipe dimensions and the first tube dimensions are the same, the shorter length of the second tube results in less airflow, affecting the pipe's ability to improve the low-frequency sound quality of the sound-generating device, leading to poor sound output. However, in this embodiment, the length of the third tube can be less than the length of the first tube. This allows for increasing the length of the second tube while maintaining the same total pipe length as the first tube, thereby increasing the internal volume of the pipe and thus increasing the overall airflow. When the sound-generating device is operating, the noise generated when air flows from the first tube to the external space of the casing is greater than the noise generated when air flows from the internal space of the casing into the third tube. In other words, the pipe in this embodiment can increase the airflow while minimizing air noise, improving the low-frequency sound quality of the sound-generating device and thus enhancing its sound output.

[0033] In one possible implementation, the first area of ​​the first tube is larger than the sixth area of ​​the third tube. It is understood that the airflow noise generated when air flows from the interior space of the casing to the third tube has a relatively small impact on the sound output of the sound-generating device. When the dimensions of the pipe, the first tube, and the second tube are all the same, having the sixth area of ​​the third tube smaller than the first area of ​​the first tube can reduce the manufacturing cost of the pipe, and thus the manufacturing cost of the sound-generating device, while ensuring lower airflow noise.

[0034] In one possible implementation, compared to the pipes of a typical sound-generating device, the length of the second pipe body is a smaller proportion of the total pipe length. This results in a longer section of the pipe with the sheet-like structure, a smaller internal volume, and reduced airflow. However, in this embodiment, the length of the second pipe body can be greater than or equal to 50% of the total pipe length. Thus, with the same pipe dimensions, the longer second pipe body in this embodiment increases the internal volume of the pipe, thereby increasing the airflow throughout the pipe. This improves the sound quality of the low-frequency band and enhances the low-frequency performance of the sound-generating device.

[0035] In one possible implementation, the housing has a first mounting hole connecting the internal space of the housing to the external space. A speaker covers the first mounting hole, isolating it from the internal space, and emits sound into the external space through the first mounting hole. Thus, when the sound-emitting device is operating, the speaker diaphragm vibrates to produce sound. When the speaker operates in the low-frequency range, the acoustic quality of the air inside the duct and the acoustic compliance of the internal space of the housing can resonate and radiate low-frequency sound waves, thereby improving the low-frequency performance of the sound-emitting device.

[0036] Secondly, an electronic device is provided. The electronic device includes a device housing and the aforementioned sound-generating device, with the sound-generating device mounted on the device housing. The electronic device in this embodiment can reduce turbulence noise while maintaining low-frequency performance, thereby improving the user experience. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0038] Figure 1 is a structural schematic diagram of one embodiment of the sound-generating device provided in this application;

[0039] Figure 2 is a structural schematic diagram of the sound-generating device shown in Figure 1 from another perspective;

[0040] Figure 3 is an exploded structural diagram of the sound-generating device shown in Figure 1 in some embodiments.

[0041] Figure 4 is a partial cross-sectional view of one embodiment of the sound-generating device shown in Figure 1, cut along point AA.

[0042] Figure 5 is a partial cross-sectional structural diagram of one embodiment of the sound-generating device shown in Figure 1, cut along BB.

[0043] Figure 6 is a structural schematic diagram of the pipeline shown in Figure 3 in some embodiments;

[0044] Figure 7 is an exploded structural diagram of the pipeline shown in Figure 6 in some embodiments;

[0045] Figure 8 is a structural schematic diagram of the first pipe body of the pipe shown in Figure 7 in some embodiments;

[0046] Figure 9 is a partial cross-sectional structural diagram of one embodiment of the pipe shown in Figure 6, cut along CC.

[0047] Figure 10 is a schematic diagram of the assembly structure of the first tube and the second tube shown in Figure 7 in some embodiments;

[0048] Figure 11 is a partial cross-sectional view of one embodiment of the pipe shown in Figure 6, cut along CC.

[0049] Figure 12 is a structural schematic diagram of the third pipe body of the pipeline shown in Figure 7 in some embodiments;

[0050] Figure 13 is a partial cross-sectional view of one embodiment of the pipe shown in Figure 6, cut along CC.

[0051] Figure 14 is a structural schematic diagram of the pipe shown in Figure 6 from another perspective;

[0052] Figure 15 is a schematic cross-sectional view of one embodiment of the pipe shown in Figure 6 cut along CC;

[0053] Figure 16 is a cross-sectional structural diagram of one embodiment of the sound-generating device shown in Figure 1, cut along point AA.

[0054] Figure 17 is a schematic diagram comparing the airflow velocity of the pipe of the sound-generating device shown in Figure 3 with that of a typical sound-generating device. Detailed Implementation

[0055] The embodiments of this application are described below with reference to the accompanying drawings.

[0056] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0057] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0058] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0059] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in another embodiment" appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0060] It is understood that the specific embodiments described herein are merely for explaining the relevant invention and not for limiting the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0061] Figure 1 is a structural schematic diagram of one embodiment of the sound-generating device 100 provided in this application. Figure 2 is a structural schematic diagram of the sound-generating device 100 shown in Figure 1 from another perspective. Figure 3 is an exploded structural schematic diagram of the sound-generating device 100 shown in Figure 1 in some embodiments.

[0062] As shown in Figures 1 to 3, the electronic device can be a tablet computer, multimedia player, headphones, speaker, laptop computer, in-vehicle device, foldable terminal device, television, or wearable device, etc., capable of playing sound. The sound-generating device 100 shown in Figure 1 is illustrated using a speaker as an example. In other embodiments, the sound-generating device 100 shown in Figure 1 can also be applied to an electronic device to realize its sound-generating function. For example, the sound-generating device 100 can be installed in the device housing of the electronic device. The sound-generating device 100 can be used to realize the audio function of the electronic device. It should be noted that Figures 1 to 3 and the related figures below only schematically show some components included in the sound-generating device 100; the actual shape, size, position, and structure of these components are not limited by Figure 1 and the figures below. For ease of description, the width direction of the sound-generating device 100 is defined as the X-axis direction, the length direction as the Y-axis direction, and the thickness direction as the Z-axis direction. It is understood that the coordinate system setting of the sound-generating device 100 can be flexibly set according to specific actual needs.

[0063] For example, the sound-generating device 100 may include a housing 110, a speaker 120, and a circuit assembly 130. The housing 110 may be a cuboid with rounded corners. The housing 110 may have an internal space 110a. The speaker 120 and the circuit assembly 130 may both be mounted in the internal space 110a of the housing 110. The number of speakers 120 may be one or more. In other embodiments, the housing 110 may also have other shapes.

[0064] For example, circuit assembly 130 can be electrically connected to speaker 120 and an external power source. In this way, circuit assembly 130 can transfer electrical energy from the external power source to speaker 120, enabling speaker 120 to operate. When speaker 120 is operating, speaker 120 can emit sound into the external space of housing 110, thereby realizing the sound-emitting function of sound-emitting device 100.

[0065] In other embodiments, the sound-generating device 100 may also exclude the circuit assembly 130.

[0066] Figure 4 is a partial cross-sectional view of one embodiment of the sound-generating device 100 shown in Figure 1, cut along point AA. Figure 5 is a partial cross-sectional view of one embodiment of the sound-generating device 100 shown in Figure 1, cut along point BB.

[0067] As shown in Figures 3 to 5, the housing 110 may have a first mounting hole 111. The first mounting hole 111 may penetrate one of the sidewalls of the housing 110 to connect the internal space 110a of the housing 110 with the external space of the housing 110. The first mounting hole 111 may be formed on a sidewall of the housing 110 with a large area.

[0068] For example, the speaker 120 can be fixedly connected to the housing 110 and can cover the first mounting hole 111. In this case, at least a portion of the speaker 120 can be exposed relative to the first mounting hole 111. The speaker 120 can emit sound into the external space of the housing 110 through the first mounting hole 111.

[0069] Exemplarily, the loudspeaker 120 may include a diaphragm 121. The diaphragm 121 may cover the first mounting hole 111. At least a portion of the diaphragm 121 may be exposed relative to the first mounting hole 111. The diaphragm 121 may isolate the internal space 110a of the housing 110 from the external space of the housing 110. Other components of the loudspeaker 120 (e.g., voice coil, magnetic circuit assembly, etc.) may be housed within the internal space 110a of the housing 110.

[0070] In other embodiments, the first mounting hole 111 may also be located on other surfaces of the housing 110. For example, the first mounting hole 111 may be located on a sidewall of the housing 110 with a smaller area.

[0071] As shown in Figures 3 to 5, the housing 110 may also have a second mounting hole 112. The second mounting hole 112 may be spaced apart from the first mounting hole 111. The second mounting hole 112 may penetrate one of the sidewalls of the housing 110 to connect the internal space 110a of the housing 110 with the external space of the housing 110. The second mounting hole 112 may be formed on a sidewall of the housing 110 with a smaller area. The circuit assembly 130 may be fixedly connected to the second mounting hole 112 and may cover the second mounting hole 112. The circuit assembly 130 may have a power interface 131. The power interface 131 may be exposed relative to the second mounting hole 112. In this way, an external power source can electrically connect to the power interface 131 of the circuit assembly 130 to power the sound-generating device 100. In other embodiments, the second mounting hole 112 may also be located on other surfaces of the housing 110.

[0072] Figure 6 is a structural schematic diagram of the pipe 140 shown in Figure 3 in some embodiments. Figure 7 is an exploded structural schematic diagram of the pipe 140 shown in Figure 6 in some embodiments.

[0073] As shown in Figures 6 and 7, the pipe 140 may include a first pipe body 10, a second pipe body 20, and a third pipe body 30. The second pipe body 20 may be fixedly connected between the first pipe body 10 and the third pipe body 30. The first pipe body 10, the second pipe body 20, and the third pipe body 30 of the pipe 140 may all be hollow structures. The first pipe body 10 may have a first through hole 10a, the second pipe body 20 may have a second through hole 20a, and the third pipe body 30 may have a third through hole 30a. The second through hole 20a may connect the first through hole 10a and the third through hole 30a. Exemplarily, the first pipe body 10, the second pipe body 20, and the third pipe body 30 may all be elongated. In other embodiments, one or more of the first pipe body 10, the second pipe body 20, and the third pipe body 30 may also be L-shaped, S-shaped, or other shapes. This application does not specifically limit these shapes.

[0074] For example, the first pipe body 10, the second pipe body 20, and the third pipe body 30 of the pipe 140 can be manufactured separately and then assembled to obtain the complete pipe 140 structure. In this way, the manufacturing method of the pipe 140 is relatively simple, which can reduce the difficulty of preparing the pipe 140.

[0075] In some embodiments, the first pipe body 10 may be integrally formed with the second pipe body 20, while the third pipe body 30 may be manufactured separately. Alternatively, the second pipe body 20 and the third pipe body 30 may be integrally formed, while the first pipe body 10 may be manufactured separately. In other embodiments, the first pipe body 10, the second pipe body 20, and the third pipe body 30 may all be integrally formed. It is understood that the manufacturing method of the pipe 140 can be flexibly selected according to actual needs.

[0076] In some embodiments, the conduit 140 may also not include the third pipe body 30.

[0077] Figure 8 is a structural schematic diagram of the first pipe body 10 of the pipe 140 shown in Figure 7 in some embodiments. Figure 9 is a partial cross-sectional structural schematic diagram of a portion of the structure of the pipe 140 shown in Figure 6 cut along CC in one embodiment.

[0078] As shown in Figures 8 and 9, the first tube 10 can be generally trumpet-shaped. The first tube 10 may include a first end 11 and a second end 12. The first end 11 may have a first end face 11a facing away from the second end 12. The first end face 11a may be approximately annular, and the area enclosed by the first end face 11a can be a first area. The second end 12 may have a second end face 12a facing away from the first end 11. The second end face 12a may be approximately annular, and the area enclosed by the second end face 12a can be a second area. The first area can be larger than the second area. The radial dimension of the first through hole 10a can decrease along the length extension direction of the first tube 10 from the first end face 11a towards the second end face 12a. In other embodiments, the first tube 10 may also have other shapes. For example, the first tube 10 may be a cylindrical structure. In this case, the first area can be equal to the second area. The radial dimension of the first through hole 10a at all points along the length extension direction of the first tube 10 can be equal. It should be noted that the area enclosed by the ring can be the area enclosed by the inner side of the ring. The radial dimension of a component can be its inner diameter. Unless otherwise specified below, the area enclosed by the ring and the radial dimension of a component can be understood in the same way as above.

[0079] Exemplarily, the conduit 140 may further include a first sheet-like structure 40. The first pipe body 10 may have a first inner surface 13. The first sheet-like structure 40 may be located inside the first pipe body 10 and may be fixedly connected to the first inner surface 13. The number of first sheet-like structures 40 may be one or more. Multiple first sheet-like structures 40 may be spaced apart along the circumferential direction of the first pipe body 10. Exemplarily, multiple first sheet-like structures 40 may be evenly distributed on the first inner surface 13. That is, the distance between any two adjacent first sheet-like structures 40 may be equal. In other embodiments, multiple first sheet-like structures 40 may also be unevenly distributed on the first inner surface 13.

[0080] For example, a first gap 40a can be formed between two adjacent first sheet-like structures 40. The width of the first gap 40a can decrease in the direction toward the central axis of the first tube body 10. In this case, the two adjacent first sheet-like structures 40 and the first inner surface 13 can together form a U-shaped structure. For example, the width of the first gap 40a can also decrease in the length extension direction of the first tube body 10, in the direction from the first end face 11a toward the second end face 12a.

[0081] Exemplarily, the first sheet structure 40 may include a first surface 40b disposed opposite to the first inner surface 13. The height of the first sheet structure 40 may decrease in the direction from the first end face 11a toward the second end face 12a. The height direction of the first sheet structure 40 may be parallel to the radial direction of the first tube body 10. Exemplarily, the portion of the first surface 40b near the second end face 12a may be flush with the first inner surface 13.

[0082] For example, the first sheet structure 40 can be integrally formed with the first tube body 10. In other embodiments, the first sheet structure 40 and the first tube body 10 can also be manufactured separately.

[0083] Figure 10 is a schematic diagram of the assembly structure of the first pipe body 10 and the second pipe body 20 shown in Figure 7 in some embodiments. Figure 11 is a schematic diagram of a partial cross-sectional structure of the pipe 140 shown in Figure 6 cut along CC in one embodiment.

[0084] As shown in Figures 10 and 11, the second tube 20 can be generally cylindrical. The second tube 20 may include a third end 21 and a fourth end 22. The third end 21 may have a third end face 21a facing away from the fourth end 22. The third end face 21a may be approximately annular, and the area enclosed by the third end face 21a can be a third area. The fourth end 22 may have a fourth end face 22a facing away from the third end 21. The fourth end face 22a may be approximately annular, and the area enclosed by the fourth end face 22a can be a fourth area. The third area and the fourth area may be equal. In other embodiments, the second tube 20 may also have other shapes.

[0085] For example, the third end 21 of the second tube 20 can be fixedly connected to the second end 12 of the first tube 10. The second end 12 of the first tube 10 may also be provided with a first mounting groove 10b (Figure 9 also illustrates the structure of the first mounting groove 10b). The opening of the first mounting groove 10b can be formed on the first inner surface 13 and the second end surface 12a. In this case, the area enclosed by the second end surface 12a can be the area enclosed by the first mounting groove 10b on the side facing the central axis of the first tube 10.

[0086] Exemplarily, the first sheet structure 40 may be located outside the first mounting groove 10b. A portion of the third end 21 of the second tube 20 may be located within the first mounting groove 10b. The second tube 20 may also have a second inner surface 23. The second inner surface 23 may be flush with the first inner surface 13 of the first tube 10. In other embodiments, the second inner surface 23 may also be positioned closer to the central axis of the second tube 20 relative to the first inner surface 13 of the first tube 10. In this case, the third area may be smaller than the second area.

[0087] For example, in the height direction of the first sheet structure 40, the distance between the portion of the first surface 40b near the second tube 20 and the central axis of the second tube 20 is a first distance H1. The distance between the portion of the second inner surface 23 near the first tube 10 and the central axis of the second tube 20 is a second distance H2. The first distance H1 can be equal to the second distance H2. In this case, the portion of the second inner surface 23 near the first tube 10 can be flush with the portion of the first surface 40b of the first sheet structure 40 near the second tube 20. In other embodiments, the first distance H1 can also be greater than the second distance H2.

[0088] Figure 12 is a structural schematic diagram of the third pipe body 30 of the pipe 140 shown in Figure 7 in some embodiments. Figure 13 is a partial cross-sectional structural schematic diagram of a portion of the structure of the pipe 140 shown in Figure 6 cut along CC in one embodiment.

[0089] As shown in Figures 12 and 13, the third tube 30 can be generally trumpet-shaped. The third tube 30 may include a fifth end 31 and a sixth end 32. The fifth end 31 may have a fifth end face 31a facing away from the sixth end 32. The fifth end face 31a may be approximately annular, and the area enclosed by the fifth end face 31a can be the fifth area. The sixth end 32 may have a sixth end face 32a facing away from the fifth end. The sixth end face 32a may be approximately annular, and the area enclosed by the sixth end face 32a can be the sixth area. The sixth area can be larger than the fifth area. The radial dimension of the third through hole 30a can decrease along the length extension direction of the third tube 30 from the sixth end face 32a toward the fifth end face 31a. In other embodiments, the third tube 30 may also have other shapes. For example, the third tube 30 may be a cylindrical structure. In this case, the fifth area can be equal to the sixth area.

[0090] Exemplarily, the conduit 140 may further include a second sheet-like structure 50. The third pipe body 30 may also have a third inner surface 33. The second sheet-like structure 50 may be located inside the third pipe body 30 and may be fixedly connected to the third inner surface 33. The number of second sheet-like structures 50 may be one or more. Multiple second sheet-like structures 50 may be spaced apart along the circumferential direction of the third pipe body 30. Exemplarily, multiple second sheet-like structures 50 may be evenly distributed on the third inner surface 33. That is, the distance between any two adjacent second sheet-like structures 50 may be equal. In other embodiments, multiple second sheet-like structures 50 may also be unevenly distributed on the third inner surface 33.

[0091] For example, a second gap 50a can be formed between two adjacent second sheet-like structures 50. The width of the second gap 50a can decrease in the direction toward the central axis of the third tube 30. In this case, the two adjacent second sheet-like structures 50 and the third inner surface 33 can together form a U-shaped structure. For example, the width of the second gap 50a can also decrease in the length extension direction of the third tube 30, in the direction from the sixth end face 32a toward the fifth end face 31a.

[0092] Exemplarily, the second sheet-like structure 50 may include a second surface 50b disposed opposite to the third inner surface 33. The height of the second sheet-like structure 50 may decrease in the direction from the sixth end face 32a toward the fifth end face 31a. The height direction of the second sheet-like structure 50 may be parallel to the radial direction of the third tube body 30. Exemplarily, the portion of the second surface 50b near the fifth end face 31a may be flush with the third inner surface 33.

[0093] For example, the second sheet structure 50 can be integrally formed with the third tube body 30. In other embodiments, the second sheet structure 50 and the third tube body 30 can also be manufactured separately.

[0094] Figure 14 is a structural schematic diagram of the pipe 140 shown in Figure 6 from another perspective. Figure 15 is a cross-sectional schematic diagram of one embodiment of the pipe 140 shown in Figure 6 cut along CC.

[0095] As shown in Figures 14 and 15, the fifth end 31 of the third tube 30 can be fixedly connected to the fourth end 22 of the second tube 20. The fifth end 31 of the third tube 30 may also be provided with a second mounting groove 30b (the structure of the second mounting groove 30b is also illustrated in Figures 7 and 13). The opening of the second mounting groove 30b can be formed on the third inner surface 33 and the fifth end face 31a. In this case, the area enclosed by the fifth end face 31a can be the area enclosed by the second mounting groove 30b on the side facing the central axis of the third tube 30.

[0096] Exemplarily, the second sheet structure 50 may be located outside the second mounting groove 30b. A portion of the fourth end 22 of the second tube 20 may be located within the second mounting groove 30b. In this case, the third inner surface 33 of the third tube 30 may be flush with the second inner surface 23 of the second tube 20. In other embodiments, the second inner surface 23 of the second tube 20 may also be positioned closer to the central axis of the second tube 20 than the third inner surface 33 of the third tube 30. In this case, the fourth area may be smaller than the fifth area.

[0097] For example, in the height direction of the second sheet structure 50, the distance between the portion of the second surface 50b near the second tube 20 and the central axis of the second tube 20 is a third distance H3. The distance between the portion of the second inner surface 23 near the third tube 30 and the central axis of the second tube 20 can be a fourth distance H4. The third distance H3 can be equal to the fourth distance H4. In this case, the portion of the second inner surface 23 near the third tube 30 can be flush with the portion of the second surface 50b of the second sheet structure 50 near the second tube 20. In other embodiments, the third distance H3 can also be greater than the fourth distance H4.

[0098] For example, the length of the second pipe body 20 can be greater than or equal to 50% of the total length of the pipe 140. It should be noted that the length of the second pipe body 20 can be the distance between the third end face 21a and the fourth end face 22a of the second pipe body 20 along its length extension direction. The lengths of other components can also refer to the above definition, and will not be elaborated further hereafter.

[0099] For example, the length of the first tube 10 may be greater than the length of the third tube 30.

[0100] For example, the first area can be larger than the sixth area.

[0101] For example, the number of first sheet-like structures 40 in the first tube 10 may be equal to the number of second sheet-like structures 50 in the third tube 30. In other embodiments, the number of first sheet-like structures 40 may not be equal to the number of second sheet-like structures 50.

[0102] Figure 16 is a cross-sectional structural diagram of one embodiment of the sound-generating device 100 shown in Figure 1 cut along point AA.

[0103] As shown in Figure 16, the sound-generating device 100 may further include a conduit 140. The conduit 140 may be installed in the internal space 110a of the housing 110. The number of conduits 140 may be one or more.

[0104] Exemplarily, the housing 110 may have a third mounting hole 113. The third mounting hole 113 may be spaced apart from the first mounting hole 111 and the second mounting hole 112. The third mounting hole 113 may penetrate one of the sidewalls of the housing 110 to connect the internal space 110a of the housing 110 with the external space of the housing 110. The third mounting hole 113 may be formed on a sidewall of the housing 110 with a smaller area. The third mounting hole 113 may be located on the same sidewall of the housing 110 as the second mounting hole 112.

[0105] For example, at least a portion of the pipe 140 may be located within the third mounting hole 113 and fixedly connected to the wall of the third mounting hole 113. The first end face 11a of the first pipe body 10 may face the external space of the housing 110 and communicate with the external space of the housing 110. In this case, the pipe 140 may communicate with the internal space 110a of the housing 110 and the external space of the housing 110. In other embodiments, the third mounting hole 113 may also be located on other side walls of the housing 110. In other embodiments, the first end 11 of the first pipe body 10 of the pipe 140 may also be fixedly connected to the housing 110. The first through hole 10a of the first end 11 may communicate with the third mounting hole 113. In this case, the internal space 110a of the housing 110 may communicate with the external space of the housing 110 in sequence through the pipe 140 and the third mounting hole 113.

[0106] For example, the housing 110 may also have a first mounting bracket 114 (the structure of the first mounting bracket 114 is also shown in FIG4). The first mounting bracket 114 may be located in the internal space 110a of the housing 110 and may be fixedly connected to the housing 110. The outer surface of the third tube body 30 of the pipe 140 may be fixedly connected to the first mounting bracket 114, so that the pipe 140 may be fixedly connected to the housing 110.

[0107] For example, when the sound-generating device 100 is working, the diaphragm 121 of the speaker 120 vibrates to produce sound. When the speaker 120 is working in the low-frequency range, the acoustic quality of the air inside the duct 140 and the acoustic compliance of the internal space 110a of the housing 110 can resonate to radiate low-frequency sound waves, thereby improving the low-frequency performance of the sound-generating device 100.

[0108] Figure 17 is a schematic diagram comparing the airflow velocity of the pipe 140 of the sound-generating device 100 shown in Figure 3 with that of a typical sound-generating device. It should be noted that the solid curve is the fitted curve of the airflow velocity at various positions along the diameter of the opening at the first end 11 of the first tube body 10 of the pipe 140 away from the second end 12; the dashed curve is the fitted curve of the airflow velocity at various positions along the diameter of a typical pipe; the zero point of the horizontal axis can represent the midpoint of the diameter, that is, the central axis of the pipe 140.

[0109] As shown in Figure 17, when the distance is less than -40mm or greater than 40mm, the air velocity represented by the solid curve is significantly less than that represented by the dashed curve. That is, when the first tube 10 is provided with the first plate-like structure 40, the airflow velocity through the first tube 10 is lower near the first inner surface 13 of the first tube 10. At this time, the airflow noise at the first end 11 of the pipe 140 is lower, and the sound output effect of the sound-generating device 100 is better.

[0110] It is understandable that, compared to the pipes in a typical sound-generating device, the air inside the pipe has a higher velocity and pressure at low frequencies when the device is operating. At the pipe opening, due to the pressure drop, the high-pressure air at the opening flows rapidly towards the surrounding low-pressure area. This creates an outward-rotating airflow outside the pipe opening, generating airflow noise and resulting in poor sound output from the device. In this embodiment, the pipe 140 of the sound-generating device 100 may include a first tube body 10 and at least one first sheet-like structure 40. The first sheet-like structure 40 may be fixed to the first inner surface 13 of the first tube body 10. In this way, when the sound-generating device 100 is working, the first plate-shaped structure 40 can increase the contact area between the air flowing through the first tube 10 and the pipe 140, thereby increasing the viscous resistance of the air flowing through the first tube 10, slowing down the airflow speed in the first tube 10 of the pipe 140, thereby reducing the airflow noise generated by the high-speed rotating flow of air at the opening of the pipe 140, and thus improving the sound output effect of the sound-generating device 100.

[0111] Secondly, compared to the pipes of typical sound-generating devices, which have a sheet-like structure on their inner side that is approximately the same length as the pipe, this sheet-like structure occupies a significant amount of internal space, reducing airflow and resulting in poor low-frequency performance. In this embodiment, the pipe 140 of the sound-generating device 100 may include a first tube 10 and a second tube 20 connected in sequence. The inner side of the first tube 10 may be fixed with a first sheet-like structure 40, while the inner side of the second tube 20 may not have a sheet-like structure. Thus, when the sound-generating device 100 is operating, the first sheet-like structure 40 can effectively reduce the airflow velocity within the first tube 10 of the pipe 140, thereby reducing airflow noise generated at the first end 11 of the pipe 140 due to high-speed rotation. Meanwhile, in this embodiment, the second tube 20 does not have a sheet-like structure, which increases the airflow within the second tube 20, thereby increasing the airflow throughout the entire pipe 140. This is beneficial for improving the low-frequency sound quality of the sound-generating device 100 and enhancing its low-frequency performance. In other words, the pipe 140 of the sound-generating device 100 in this embodiment can reduce turbulence noise while maintaining low-frequency performance, thus improving the user experience.

[0112] Furthermore, in this embodiment, the portion of the first surface 40b of the first sheet-like structure 40 of the conduit 140 near the second end face 12a can be flush with the portion of the second inner surface 23 of the second tube body 20 near the third end face 21a. In this case, the transition between the second inner surface 23 and the first surface 40b is relatively smooth. This avoids noise generated inside the conduit 140 due to a step difference between the second inner surface 23 and the first surface 40b, which would affect the sound output effect of the sound-generating device 100. This is beneficial for improving the effect of the conduit 140 on improving the low-frequency sound quality of the sound-generating device 100, and thus enhancing the low-frequency performance of the sound-generating device 100.

[0113] In addition, the pipe 140 in this embodiment may also include a third pipe body 30 and at least one second sheet structure 50. The second pipe body 20 may be fixedly connected between the first pipe body 10 and the third pipe body 30. The second sheet structure 50 may be fixed to the third inner surface 33 of the third pipe body 30. In this case, both ends of the pipe 140 (i.e., the first pipe body 10 and the third pipe body 30) may be provided with sheet structures. Thus, when the sound-generating device 100 is operating, as the air in the internal space 110a of the housing 110 flows through the pipe 140 to the external space of the housing 110, the first plate structure 40 and the second plate structure 50 can increase the contact area between the air and the first tube 10 and the third tube 30 when the air flows through them. This increases the viscous resistance of the air flowing through the first tube 10 and the third tube 30, slows down the airflow speed within the first tube 10 and the third tube 30, and thus reduces airflow noise at both ends of the pipe 140, improving the sound output effect of the sound-generating device 100. Simultaneously, the second tube 20 of the pipe 140 does not have plate structures. This increases the airflow within the second tube 20, thereby increasing the overall airflow within the pipe 140, improving the low-frequency sound quality of the sound-generating device 100, and further enhancing the sound output effect of the sound-generating device 100.

[0114] Furthermore, compared to a pipe where the width of the gap formed by adjacent sheet structures increases along the direction towards the central axis of the pipe, in this embodiment, the width of the first gap 40a formed between two adjacent first sheet structures 40 of the pipe 140 can decrease along the length extension direction of the first tube body 10 in the direction towards the central axis of the pipe 140. Thus, when the dimensions of the pipe 140 and the first sheet structures 40 are the same, when air flows through the first tube body 10, the contact area between the air near the first inner surface 13 of the first tube body 10 and the pipe 140 is larger. This effectively slows down the airflow velocity near the first inner surface 13 of the first tube body 10, thereby reducing airflow noise generated by high-speed rotational flow at the first end 11 of the pipe 140, and thus improving the sound output effect of the sound-generating device 100.

[0115] Furthermore, compared to the pipes of typical sound-generating devices, the length of the second pipe body is a smaller proportion of the total pipe length, resulting in a longer section with the sheet-like structure and a smaller internal volume, which affects the airflow. However, in this embodiment, the length of the second pipe body 20 of the pipe 140 can be greater than or equal to 50% of the total length of the pipe 140. Thus, with the same pipe 140 dimensions, the longer length of the second pipe body 20 in this embodiment increases the internal volume of the pipe 140, thereby increasing the airflow throughout the pipe 140. This improves the low-frequency sound quality of the sound-generating device 100 and enhances its low-frequency performance.

[0116] Furthermore, compared to a typical pipe consisting of a first and third tube of equal length, where the pipe dimensions and the first tube dimensions are the same, the shorter length of the second tube results in less airflow, affecting the pipe's ability to improve the low-frequency sound quality of the sound-generating device and leading to poor sound output. In this embodiment, the length of the third tube 30 of the pipe 140 can be shorter than the length of the first tube 10. This allows for increasing the length of the second tube 20 of the pipe 140 while maintaining the same total length as the first tube 10, thereby increasing the internal volume of the pipe 140 and thus increasing the airflow throughout the pipe 140. When the sound-generating device 100 is operating, the noise generated when air flows from the first tube 10 of the pipe 140 to the external space of the housing 110 is greater than the noise generated when air flows from the internal space 110a of the housing 110 into the third tube 30 of the pipe 140. In other words, the pipe 140 in this embodiment can increase the airflow in the pipe 140 while ensuring that the air noise of the pipe 140 is low, thereby improving the low-frequency sound quality of the sound-generating device 100 and thus improving the sound output effect of the sound-generating device 100.

[0117] Furthermore, in this embodiment, the first area of ​​the first tube body 10 of the duct 140 can be larger than the sixth area of ​​the third tube body 30. This reduces the impact of airflow noise generated when air flows from the internal space 110a of the housing 110 to the third tube body 30 of the duct 140 on the sound output effect of the sound-generating device 100. When the dimensions of the duct 140, the first tube body 10, and the second tube body 20 are all the same, the sixth area of ​​the third tube body 30 is smaller than the first area of ​​the first tube body 10. This reduces the manufacturing cost of the duct 140, and consequently, the manufacturing cost of the sound-generating device 100, while ensuring low airflow noise in the sound-generating device 100.

[0118] In some embodiments, the conduit 140 may not include the second sheet structure 50. It is understood that the airflow noise generated when air flows from the internal space 110a of the housing 110 to the third tube 30 of the conduit 140 has a relatively small impact on the sound output of the sound-generating device 100. In this case, the manufacturing cost of the conduit 140 can be reduced while ensuring that the airflow noise of the sound-generating device 100 is minimized, thereby reducing the overall manufacturing cost of the sound-generating device 100.

[0119] In some embodiments, the conduit 140 may also not have a third pipe body 30.

[0120] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0121] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0122] The above are merely some embodiments of this application, and 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 sound-generating device (100), characterized in that, The device includes a housing (110), a speaker (120), and a conduit (140). The housing (110) has an internal space (110a). The speaker (120) and the conduit (140) are both installed in the internal space (110a). The speaker (120) is fixedly connected to the housing (110). The speaker (120) is used to emit sound to the external space of the housing (110). One end of the pipe (140) is located in the internal space (110a), and the other end of the pipe (140) is fixedly connected to the housing (110). The pipe (140) connects the internal space (110a) of the housing (110) with the external space of the housing (110). The pipe (140) includes a first pipe body (10), a second pipe body (20) and a first sheet structure (40). The first pipe body (10) is fixedly connected to one end of the second pipe body (20). The first pipe body (10) has a first inner surface (13). The first sheet structure (40) is located inside the first pipe body (10) and is fixedly connected to the first inner surface (13). The first sheet structure (40) includes a first surface (40b) disposed away from the first inner side surface (13), and the second tube body (20) has a second inner side surface (23). In the height direction of the first sheet structure (40), the distance between the portion of the first surface (40b) near the second tube body (20) and the central axis of the second tube body (20) is greater than or equal to the distance between the portion of the second inner side surface (23) near the first tube body (10) and the central axis of the second tube body (20).

2. The sound-generating device (100) according to claim 1, characterized in that, The portion of the first surface (40b) near the second tube body (20) is flush with the portion of the first inner surface (13) near the second tube body (20).

3. The sound-generating device (100) according to claim 1, characterized in that, The portion of the first inner side surface (13) near the second tube body (20) is flush with the portion of the second inner side surface (23) near the first tube body (10).

4. The sound-generating device (100) according to any one of claims 1 to 3, characterized in that, The first tube (10) has a first end face (11a) and a second end face (12a), the first end face (11a) is disposed opposite to the second tube (20), and the second end face (12a) is fixedly connected to the second tube (20); Both the first end face (11a) and the second end face (12a) are annular. The area enclosed by the first end face (11a) is the first area, and the area enclosed by the second end face (12a) is the second area. The first area is greater than or equal to the second area.

5. The sound-generating device (100) according to any one of claims 1 to 3, characterized in that, The first tube (10) has a second end face (12a), the second tube (20) has a third end face (21a), and the second end face (12a) is fixedly connected to the third end face (21a); Both the second end face (12a) and the third end face (21a) are annular. The area enclosed by the second end face (12a) is the second area, and the area enclosed by the third end face (21a) is the third area. The second area is greater than or equal to the third area.

6. The sound-generating device (100) according to any one of claims 1 to 3, characterized in that, The number of the first sheet-like structures (40) is multiple, and the multiple first sheet-like structures (40) are spaced apart along the circumferential direction of the first tube body (10). There is a first gap (40a) between two adjacent first sheet-like structures (40), and the width of the first gap (40a) decreases along the direction toward the central axis of the first tube body (10).

7. The sound-generating device (100) according to claim 4, characterized in that, The number of the first sheet structure (40) is multiple, and the multiple first sheet structures (40) are spaced apart along the circumferential direction of the first tube body (10). There is a first gap (40a) between two adjacent first sheet structures (40), and the width of the first gap (40a) decreases along the direction from the first end face (11a) toward the second end face (12a).

8. The sound-generating device (100) according to claim 4, characterized in that, The height of the first sheet structure (40) decreases along the direction from the first end face (11a) toward the second end face (12a).

9. The sound-generating device (100) according to claim 4, characterized in that, The first tube (10) further includes a first mounting groove (10b), the opening of which is formed on the first inner side (13) and the second end face (12a) of the first tube (10), and at least a portion of the second tube (20) is located in the first mounting groove (10b).

10. The sound-generating device (100) according to any one of claims 1 to 3, characterized in that, The first sheet structure (40) is integrally formed with the first tube body (10).

11. The sound-generating device (100) according to claim 1, characterized in that, The pipe (140) also includes a third pipe body (30), and the second pipe body (20) is fixedly connected between the third pipe body (30) and the first pipe body (10); The pipe (140) further includes a second sheet structure (50), and the third pipe body (30) has a third inner surface (33). The second sheet structure (50) is located inside the third pipe body (30) and is fixedly connected to the third inner surface (33).

12. The sound-generating device (100) according to claim 11, characterized in that, The second sheet structure (50) has a second surface (50b) disposed opposite to the third inner side surface (33). In the height direction of the second sheet structure (50), the distance between the portion of the second surface (50b) near the second tube body (20) and the central axis of the second tube body (20) is greater than or equal to the distance between the portion of the second inner side surface (23) near the third tube body (30) and the central axis of the second tube body (20).

13. The sound-generating device (100) according to claim 12, characterized in that, The portion of the second surface (50b) near the second tube body (20) is flush with the portion of the third inner surface (33) near the second tube body (20).

14. The sound-generating device (100) according to claim 12, characterized in that, The portion of the third inner side surface (33) near the second tube body (20) is flush with the portion of the second inner side surface (23) near the third tube body (30).

15. The sound-generating device (100) according to any one of claims 11 to 14, characterized in that, The second tube (20) has a fourth end face (22a), and the third tube (30) has a fifth end face (31a), wherein the fourth end face (22a) is fixedly connected to the fifth end face (31a); Both the fourth end face (22a) and the fifth end face (31a) are annular. The area enclosed by the fourth end face (22a) is the fourth area, and the area enclosed by the fifth end face (31a) is the fifth area. The fifth area is greater than or equal to the fourth area.

16. The sound-generating device (100) according to any one of claims 11 to 14, characterized in that, The number of the second sheet-like structures (50) is multiple, and the multiple second sheet-like structures (50) are spaced apart along the circumferential direction of the third tube (30). There is a second gap (50a) between two adjacent second sheet-like structures (50), and the width of the second gap (50a) decreases along the direction toward the central axis of the third tube (30).

17. The sound-generating device (100) according to any one of claims 11 to 14, characterized in that, The third tube (30) has a fifth end face (31a) and a sixth end face (32a), the fifth end face (31a) is fixedly connected to the second tube (20), and the sixth end face (32a) is disposed away from the second tube (20); Both the fifth end face (31a) and the sixth end face (32a) are annular. The area enclosed by the fifth end face (31a) is the fifth area, and the area enclosed by the sixth end face (32a) is the sixth area. The sixth area is larger than the fifth area.

18. The sound-generating device (100) according to claim 17, characterized in that, The number of the second sheet-like structures (50) is multiple, and the multiple second sheet-like structures (50) are spaced apart along the circumferential direction of the third tube body (30). There is a second gap (50a) between two adjacent second sheet-like structures (50), and the width of the second gap (50a) decreases along the direction from the sixth end face (32a) toward the fifth end face (31a).

19. The sound-generating device (100) according to claim 17, characterized in that, The height of the second sheet structure (50) in the radial direction of the third tube (30) decreases along the direction from the sixth end face (32a) toward the fifth end face (31a).

20. The sound-generating device (100) according to claim 15, characterized in that, The third tube (30) further includes a second mounting groove (30b), which is formed on the fifth end face (31a) of the third tube (30), and at least a portion of the second tube (20) is located within the second mounting groove (30b).

21. The sound-generating device (100) according to any one of claims 11 to 14, characterized in that, The second sheet structure (50) is integrally formed with the third tube (30).

22. The sound-generating device (100) according to any one of claims 11 to 14, characterized in that, The length of the first tube (10) is greater than the length of the third tube (30).

23. The sound-generating device (100) according to any one of claims 11 to 14, characterized in that, The first tube (10) has a first end face, which is disposed away from the second tube, and the third tube (30) has a sixth end face (32a), which is disposed away from the second tube (20). Both the first end face and the sixth end face are annular. The area enclosed by the first end face (11a) is the first area, and the area enclosed by the sixth end face (32a) is the sixth area. The first area is larger than the sixth area.

24. The sound-generating device (100) according to any one of claims 1 to 3, characterized in that, The length of the second pipe body (20) is greater than or equal to 50% of the total length of the pipe (140).

25. The sound-generating device (100) according to any one of claims 1 to 3, characterized in that, The housing (110) has a first mounting hole (111) that connects the internal space (110a) of the housing (110) with the external space of the housing (110). The speaker (120) covers the first mounting hole (111) and isolates the first mounting hole (111) from the internal space (110a). The speaker (120) emits sound to the external space of the housing (110) through the first mounting hole (111).

26. An electronic device, characterized in that, The device includes a housing and a sound-generating device (100) as described in any one of claims 1 to 25, the sound-generating device (100) being mounted on the housing.

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