Acoustic output equipment

Abstract

The invention relates to an acoustic output device which comprises a shell and an air conduction vibrator, the air conduction vibrator is arranged in the shell, the shell is provided with a first acoustic cavity and a second acoustic cavity, the first acoustic cavity and the second acoustic cavity are located on the two sides of a vibrating diaphragm of the air conduction vibrator respectively, the shell is provided with a sound outlet hole and a first pressure relief hole, the sound outlet hole is communicated with the first acoustic cavity, and the first pressure relief hole is communicated with the second acoustic cavity. And the first pressure relief hole is communicated with the second acoustic cavity.

Description

An acoustic output device [Technical Field]

[0001] This application relates to the technical field of electronic devices, specifically to an acoustic output device. [Background Technology]

[0002] Headphones are designed for users to wear and listen to sound. Users can listen to sound during activities such as running or when not exercising. However, in certain scenarios, users may find that the sound performance of headphones is worse during exercise than when not exercising.

[0003] [Utility Model Content]

[0004] This application provides an acoustic output device, comprising a housing and an air-conducting vibrator disposed within the housing. The housing has a first acoustic cavity and a second acoustic cavity, which are respectively located on opposite sides of the diaphragm of the air-conducting vibrator. The housing has a sound outlet and a first pressure relief hole, the sound outlet communicating with the first acoustic cavity and the first pressure relief hole communicating with the second acoustic cavity. The acoustic output device further includes a first partition and a second partition, both connected to the housing and respectively used to shield the first pressure relief hole. Along the propagation direction of the air-conducted sound generated by the air-conducting vibrator within the first pressure relief hole, the second partition and the first partition are arranged sequentially, with the first partition being closer to the outer side of the housing than the second partition. The minimum spacing between the first partition and the second partition is not less than 0.2 mm.

[0005] This application provides an acoustic output device, comprising a housing and an air-conducting vibrator disposed within the housing. The housing has a first acoustic cavity and a second acoustic cavity, which are respectively located on opposite sides of the diaphragm of the air-conducting vibrator. The housing has a sound outlet and a first pressure relief hole, the sound outlet communicating with the first acoustic cavity and the first pressure relief hole communicating with the second acoustic cavity. The acoustic output device further includes a first mesh connected to the housing and used to shield the first pressure relief hole. The first mesh has a plurality of mesh openings penetrating through it. At least a portion of each of the plurality of mesh openings forms a contour line on the outer surface of the first mesh. The contour line has a minimum circumscribed sphere with a center. In at least a portion of the contour line, the distance between a point on the contour line and the center of the sphere varies along the circumference of the contour line.

[0006] This application provides an acoustic output device, which includes a housing and an air-conducting vibrator. The air-conducting vibrator is disposed within the housing. The housing has a first acoustic cavity and a second acoustic cavity, which are respectively located on both sides of the diaphragm of the air-conducting vibrator. The housing is provided with a sound outlet and a first pressure relief hole. The sound outlet communicates with the first acoustic cavity, and the first pressure relief hole communicates with the second acoustic cavity. The acoustic output device also includes a first partition, which is connected to the outside of the housing and is used to shield the first pressure relief hole. The first partition has at least one water-proof groove penetrating through it, and the water-proof groove is elongated. [Attached Image Description]

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 is a schematic diagram of the acoustic output device in some embodiments of this application;

[0009] Figure 2 is a schematic diagram of the front outline of a user's ear in some embodiments of this application;

[0010] Figure 3 is a schematic diagram of the movement assembly in some embodiments of the embodiment shown in Figure 1;

[0011] Figure 4 is an exploded view of the movement components in the embodiment shown in Figure 3;

[0012] Figure 5 is a schematic diagram of the assembly of the movement components in the embodiment shown in Figure 3.

[0013] Figure 6 is a schematic diagram of the movement assembly in some other embodiments of the embodiment shown in Figure 5;

[0014] Figure 7 is a schematic diagram of the structure of the first partition net in the embodiment shown in Figure 6;

[0015] Figure 8 is a schematic diagram of the outline of the mesh formed on the outer surface of the first partition in the embodiment shown in Figure 7.

[0016] Figure 9 is a schematic diagram of the structure in which the outline of the embodiment shown in Figure 8 has 3 sides in some embodiments;

[0017] Figure 10 is a schematic diagram of the structure of the outline in the embodiment shown in Figure 8, where the number of sides is 4 in some embodiments;

[0018] Figure 11 is a schematic diagram of the structure of the outline in the embodiment shown in Figure 8, where the number of sides is 5 in some embodiments;

[0019] Figure 12 is a schematic diagram of the orthographic projection of the first mesh on the reference plane defined by the first direction X and the second direction Y in the embodiment shown in Figure 7;

[0020] Figure 13 is a schematic diagram of the movement assembly in some other embodiments of the embodiment shown in Figure 5;

[0021] Figure 14 is a schematic diagram of the structure of the first partition net in the embodiment shown in Figure 13;

[0022] Figure 15 is a schematic diagram of the orthographic projection of the first mesh on the reference plane defined by the first direction X and the second direction Y in the embodiment shown in Figure 14.

[0023] Figure 16 is a schematic diagram of the orthographic projection of the first mesh in the embodiment shown in Figure 14 onto a reference plane defined in the first direction X and the second direction Y in other embodiments.

[0024] Figure 17 is a schematic diagram of the orthographic projection of the first mesh in the embodiment shown in Figure 14 onto a reference plane defined by the first direction X and the second direction Y in some other embodiments.

[0025] Figure 18 is a schematic diagram of the orthographic projection of the first mesh in the embodiment shown in Figure 14 onto a reference plane defined by the first direction X and the second direction Y in some other embodiments.

[0026] Figure 19 is a partial structural schematic diagram of the mesh component in some other embodiments of the embodiment shown in Figure 5;

[0027] Figure 20 is a schematic diagram of a portion of the structure of the mesh component in the embodiment shown in Figure 19 from another perspective;

[0028] Figure 21 is a partial structural schematic diagram of the shell in the embodiment shown in Figure 4;

[0029] Figure 22 is a schematic diagram of the structure of the second housing and the mesh assembly in the embodiment shown in Figure 4.

Detailed Implementation Methods

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0031] The reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0032] This application provides an acoustic output device, comprising a housing and an air-conducting vibrator disposed within the housing. The housing has a first acoustic cavity and a second acoustic cavity, located on opposite sides of the diaphragm of the air-conducting vibrator. The housing has a sound outlet and a first pressure relief hole, the sound outlet communicating with the first acoustic cavity and the first pressure relief hole communicating with the second acoustic cavity. The acoustic output device further includes a first mesh and a second mesh, both connected to the housing and used to shield the first pressure relief hole. Along the propagation direction of the air-conducted sound generated by the air-conducting vibrator within the first pressure relief hole, the second mesh and the first mesh are arranged sequentially, with the first mesh being closer to the outer side of the housing than the second mesh. The minimum spacing between the first mesh and the second mesh is not less than 0.2 mm.

[0033] In some embodiments, at least a portion of the first mesh is exposed outside the housing, and the second mesh is connected to the first pressure relief hole or the first acoustic cavity.

[0034] In some embodiments, the acoustic output device further includes a mesh support, which is disposed within and connected to the housing, and the second mesh is disposed on the mesh support.

[0035] In some embodiments, the second partition net is disposed on the side of the partition net support opposite to the first partition net.

[0036] In some embodiments, the housing includes a first housing and a second housing, the first housing and the second housing being fastened together, and a limiting groove is provided on the inner side of the first housing and / or the second housing, and the mesh support is inserted into the limiting groove along the fastening direction of the first housing and the second housing.

[0037] In some embodiments, there are two limiting grooves, which are respectively disposed on the first housing and the second housing. Along the fastening direction, one end of the mesh bracket is inserted into the limiting groove of the first housing, and the other end is inserted into the limiting groove of the second housing.

[0038] In some embodiments, the first pressure relief hole includes two pressure relief holes, one of which is disposed in the first housing and the other of which is disposed in the second housing, and the second mesh is configured to simultaneously shield the two pressure relief holes.

[0039] In some embodiments, the partition support is provided with two sound guiding windows, which are spaced apart along the fastening direction and respectively correspond to the two pressure relief holes. The second partition is configured to simultaneously cover the two sound guiding windows.

[0040] In some embodiments, the first housing and / or the second housing includes a housing wall and a stop portion, the stop portion being disposed on the inner side of the housing wall and spaced apart from the inner wall surface of the housing wall, and the limiting groove being located on the housing wall and the stop portion; when the mesh support is inserted into the limiting groove, the stop portion is used to connect the mesh support, so that the mesh support abuts against the inner wall surface of the housing wall.

[0041] In some embodiments, the first mesh and the second mesh are stacked.

[0042] This application provides an acoustic output device, wherein the acoustic output device includes a housing and an air-conducting vibrator, the air-conducting vibrator being disposed within the housing, the housing having a first acoustic cavity and a second acoustic cavity, the first acoustic cavity and the second acoustic cavity being respectively located on both sides of the diaphragm of the air-conducting vibrator, the housing having a sound outlet and a first pressure relief hole, the sound outlet communicating with the first acoustic cavity, and the first pressure relief hole communicating with the second acoustic cavity; the acoustic output device further includes a first mesh, the first mesh being connected to the housing and used to shield the first pressure relief hole, the first mesh having a plurality of mesh openings penetrating the first mesh, at least a portion of each of the plurality of mesh openings forming a contour line on the outer surface of the first mesh, the contour line having a minimum circumscribed sphere having a center, and on at least a portion of the contour line, the distance between a point on the contour line and the center of the sphere changing along the circumference of the contour line.

[0043] In some embodiments, each edge in the same contour line lies in the same plane.

[0044] In some embodiments, the contour line is a closed contour line.

[0045] In some embodiments, the closed contour line is a polygon.

[0046] In some embodiments, the number of sides of the closed contour line is no more than 6.

[0047] In some embodiments, among the three sides connected sequentially in the same contour line, only the middle side is a straight side or a curved side.

[0048] In some embodiments, the diameter of the minimum circumscribed ball is not less than 0.4 mm.

[0049] In some embodiments, the plurality of mesh openings includes a plurality of first mesh openings and a plurality of second mesh openings, wherein at least a portion of each of the plurality of first mesh openings forms the outline on the outer surface of the first mesh, and / or at least a portion of each of the plurality of second mesh openings forms the outline on the outer surface of the first mesh; the diameter of the minimum circumscribed ball corresponding to the first mesh opening is smaller than the diameter of the minimum circumscribed ball corresponding to the second mesh opening.

[0050] In some embodiments, the plurality of first mesh openings are arranged around the periphery of the plurality of second mesh openings.

[0051] In some embodiments, on the outer surface of the first mesh, along the direction from the edge toward the center, the mesh closest to the center among two adjacent mesh openings has a larger diameter corresponding to the smallest circumscribed ball.

[0052] This application provides an acoustic output device, wherein the acoustic output device includes a housing and an air-conducting vibrator, the air-conducting vibrator being disposed within the housing, the housing having a first acoustic cavity and a second acoustic cavity, the first acoustic cavity and the second acoustic cavity being respectively located on both sides of the diaphragm of the air-conducting vibrator, the housing having a sound outlet and a first pressure relief hole, the sound outlet communicating with the first acoustic cavity, the first pressure relief hole communicating with the second acoustic cavity, the acoustic output device further including a first partition, the first partition being connected to the outside of the housing and used to shield the first pressure relief hole, the first partition having at least one water-proof groove penetrating the first partition, the water-proof groove being elongated.

[0053] In some embodiments, the width of the water-blocking groove is not less than 0.4 mm; and / or, the minimum distance between the water-blocking groove and the edge of the first mesh is not less than 0.8 mm.

[0054] In some embodiments, the housing has a first direction, a second direction, and a third direction orthogonal to each other. The housing includes a first shell wall and a second shell wall spaced apart along the first direction. The housing also includes a third shell wall connecting the first shell wall and the second shell wall. The first pressure relief hole is disposed on the third shell wall, and the first mesh is connected to the third shell wall. In the wearing state, the first shell wall faces the user's head, the second shell wall is disposed on the side of the first shell wall away from the user's head, and the third shell wall is located on the side of the housing away from the top of the user's head along the third direction.

[0055] In some embodiments, on a reference plane parallel to the first direction and the second direction, the longitudinal direction of the water-blocking channel has an orthographic projection, the orthographic projection having a first extension component along the first direction and a second extension component along the second direction.

[0056] In some embodiments, the second shell wall is provided with a second pressure relief hole, which communicates with the second acoustic cavity.

[0057] In some embodiments, the number of water-proof channels is multiple, and the multiple water-proof channels are arranged at intervals between each other.

[0058] In some embodiments, the distance between two adjacent water-blocking tanks is not less than 0.4 mm.

[0059] In some embodiments, the first mesh further includes a plurality of mesh openings that connect the inner and outer surfaces of the first mesh.

[0060] In some embodiments, the mesh is arranged in a polygonal pattern.

[0061] In some embodiments, the water-blocking channel is bent.

[0062] Please refer to Figure 1, which is a schematic diagram of the acoustic output device in some embodiments of this application. The acoustic output device 100 can serve as a sound source to output sound, such as air-conducted sound or bone-conducted sound. The acoustic output device 100 can be worn on the user's head and can be at least partially adjacent to the user's ear, so that sound can be transmitted to the user's ear, achieving the effect of the user listening to sound. In some embodiments, the acoustic output device 100 can be referred to as "earphones". In some embodiments, the acoustic output device 100 can also integrate other functions such as sound pickup and image display, which will not be described in detail. In some embodiments, the acoustic output device 100 can drive an air load to generate air-conducted sound, or it can drive a physical load (such as the acoustic output device 100, user tissue, bones, etc.) to generate bone-conducted sound.

[0063] The acoustic output device 100 may include a wearable component 1001 and a mechanism assembly 1002 connected to the wearable component 1001. The wearable component 1001 cooperates with the mechanism assembly 1002 to enable the mechanism assembly 1002 to be worn on the user's head.

[0064] The wearing piece 1001 can be encircled around the user's head or hung on the user's head for wearing, and can also be hung on the user's ear. Furthermore, the wearing piece 1001 can also be hung only on the user's ear, thus the wearing piece 1001 can also be called an "ear hook". The main function of the wearing piece 1001 is to cooperate with the mechanism assembly 1002; therefore, this application does not limit the specific form of the wearing piece 1001, as long as it can cooperate with the mechanism assembly 1002 to achieve the wearing of the mechanism assembly 1002 on the user's head.

[0065] The mechanism assembly 1002 serves as the structure for implementing the main functions of the acoustic output device 100. For example, the mechanism assembly 1002 can drive an air load to generate air-conducted sound. For example, the mechanism assembly 1002 can drive a physical load (such as the mechanism assembly 1002, user tissue, bones, etc.) to generate bone-conducted sound. For example, the mechanism assembly 1002 can realize other functions such as sound pickup and image display, which will not be elaborated further.

[0066] In some embodiments, the mechanism assembly 1002 may or may not contact the user when it drives an air load to generate air-conducted sound, although contact with the user is also permissible. In some embodiments, the mechanism assembly 1002 may contact the user when it drives a physical load to generate bone-conducted sound.

[0067] The movement assembly 1002 can be worn on the user's head through the wearing piece 1001. Of course, the wearing piece 1001 can also be replaced with other structures so that the movement assembly 1002 can be worn on the user's head through other structures and / or other wearing methods, which will not be elaborated here.

[0068] Please refer to Figure 2, which is a schematic diagram of the anterior contour of a user's ear in some embodiments of this application. The ear 200 may include physiological parts such as the external auditory canal 2001, the concha 2002, the cymba conchae 2003, the triangular fossa 2004, the antihelix 2005, the scaphoid fossa 2006, the helix 2007, and the antitragus 2008. The external auditory canal 2001 has a certain depth and can extend to the tympanic membrane; however, for ease of description, unless otherwise specified, the external auditory canal 2001 may refer to the ear opening of the ear 200. Additionally, the physiological parts such as the concha 2002, cymba conchae 2003, and triangular fossa 2004 may also have a certain volume and depth. The concha 2002 may be directly connected to the external auditory canal 2001, meaning the ear opening can be considered to be located at the bottom of the concha 2002. In Figure 2, the user's head has a facial region M adjacent to the ear 200. In some embodiments, the face region M may be located in front of the ear 200. Of course, the face region M may also be divided and adjusted on the user's face as needed by those skilled in the art.

[0069] It should be noted that in medicine, anatomy, and other fields, the human body can be defined by three basic planes: the sagittal plane, the coronal plane, and the horizontal plane; and three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a section perpendicular to the ground along the anteroposterior direction of the body, dividing the body into left and right parts. The coronal plane is a section perpendicular to the ground along the left-right direction of the body, dividing the body into anterior and posterior parts. The horizontal plane is a section parallel to the ground along the vertical direction of the body, dividing the body into superior and inferior parts. Correspondingly, the sagittal axis is the axis along the anteroposterior direction of the body and perpendicular to the coronal plane; the coronal axis is the axis along the left-right direction of the body and perpendicular to the sagittal plane; and the vertical axis is the axis along the vertical direction of the body and perpendicular to the horizontal plane. Furthermore, the "anterior side of the ear" mentioned in this application is a concept relative to "posterior side of the ear," the former referring to the side of the ear facing the face, and the latter referring to the side of the ear facing away from the face. The ear 200 of the human body viewed along the coronal axis can be seen in Figure 2.

[0070] Please refer to Figures 1 and 2 together. When the acoustic output device 100 is worn on the user's head, it can be in a wearing state, and the mechanism assembly 1002 can be positioned close to the ear 200. Of course, the mechanism assembly 1002 can also be in contact with the user's head, the ear 200, or the face.

[0071] In some embodiments, when the acoustic output device 100 is in a wearing state, the mechanism assembly 1002 may be located in the facial region M adjacent to the ear 200, to be closer to the ear 200. In some embodiments, the mechanism assembly 1002 may contact the facial skin in the facial region M to achieve stable wearing. In some embodiments, the contact between the mechanism assembly 1002 and the facial skin in the facial region M may drive a physical load (e.g., mechanism assembly 1002, user tissue, bone, etc.) to generate bone conduction sound.

[0072] Referring to Figure 1, the number of movement components 1002 can be two, such as a first movement component 1003 and a second movement component 1004. The first movement component 1003 can be worn on the user's left ear 200, and the second movement component 1004 can be worn on the user's right ear 200. In some embodiments, the number of movement components 1002 can be one; for example, one of the first movement component 1003 and the second movement component 1004 can be omitted.

[0073] In some embodiments, the first mechanism assembly 1003 may be worn corresponding to the user's left ear 200 and may be located in the facial area M adjacent to the user's left ear 200, and the second mechanism assembly 1004 may be worn corresponding to the user's right ear 200 and may be located in the facial area M adjacent to the user's right ear 200.

[0074] Please refer to Figures 3 and 4 together. Figure 3 is a structural schematic diagram of the mechanism assembly 1002 in some embodiments of the embodiment shown in Figure 1, and Figure 4 is an exploded schematic diagram of the mechanism assembly 1002 in the embodiment shown in Figure 3. The mechanism assembly 1002 may include a housing 10 and an air-conducting vibrator 20 supported by the housing 10. The housing 10 can be used to support and mount the air-conducting vibrator 20. The air-conducting vibrator 20 can generate air-conducted sound to be transmitted to the user's ear 200.

[0075] In some embodiments, the air-conducting oscillator 20 may include a diaphragm 21 to induce air vibration when the diaphragm 21 vibrates, thereby driving an air load to generate sound and transmitting the sound to the user's ear 200 through the principle of air vibration.

[0076] In some embodiments, the housing 10 has a first acoustic cavity 201 and a second acoustic cavity 202, which are located on both sides of the diaphragm 21 of the air-conducting vibrator 20.

[0077] In some embodiments, the first acoustic cavity 201 may be referred to as the "rear cavity," and the second acoustic cavity 202 may be referred to as the "front cavity." In some embodiments, the distinction between the "front cavity" and the "rear cavity" is that the "front cavity" is located on the side of the diaphragm 21 facing away from the magnetic circuit system 22, and the "rear cavity" is located on the side of the diaphragm 21 closer to the magnetic circuit system 22. Of course, the distinction between the "front cavity" and the "rear cavity" can also be based on the art.

[0078] In some embodiments, the air-conducting vibrator 20 may cooperate with the housing 10 to form a first acoustic cavity 201 and a second acoustic cavity 202 on both sides of the diaphragm 21 of the air-conducting vibrator 20.

[0079] In some embodiments, the first acoustic cavity 201 and the second acoustic cavity 202 may be connected, which helps to reduce the resistance of the diaphragm 21 of the air-conducting vibrator 20 during vibration. Of course, in some scenarios, the first acoustic cavity 201 and the second acoustic cavity 202 may not be connected, and the two acoustic cavities 202 are isolated from each other, which helps to reduce interference between sounds. Specifically, the first acoustic cavity 201 and the second acoustic cavity 202 may be connected or not connected according to the needs of those skilled in the art.

[0080] In some embodiments, the magnetic circuit system 22 is used to drive the diaphragm 21 to vibrate; that is, the magnetic circuit system 22 may also be part of the air-conducting oscillator 20. Specifically, the process of the diaphragm 21 vibrating or the magnetic circuit system 22 driving the diaphragm 21 to vibrate can be implemented based on conventional techniques in the art, and will not be described in detail here.

[0081] In some embodiments, the housing 10 is provided with a sound outlet 103 communicating with the first acoustic cavity 201. The sound outlet 103 is used to transmit the air-conducted sound generated by the air-conducting vibrator 20 from inside the first acoustic cavity 201 to outside the housing 10.

[0082] In some embodiments, the housing 10 is provided with a first pressure relief hole 104 communicating with the second acoustic cavity 202. The first pressure relief hole 104 allows the second acoustic cavity 202 to communicate with the external environment (outside the housing 10), that is, air can circulate between the second acoustic cavity 202 and the external environment, which helps to reduce the resistance of the diaphragm 21 of the air-conducting vibrator 20 during vibration. In some embodiments, the first pressure relief hole 104 can cooperate with the sound outlet 103 to reduce sound leakage of the acoustic output device 100 in the far field.

[0083] In some embodiments, the housing 10 may include a mesh assembly 14 disposed at the first pressure relief hole 104. In some embodiments, the mesh assembly 14 may modulate the sound emitted by the air-conducting vibrator 20 to improve the acoustic performance of the acoustic output device 100. In some embodiments, the mesh assembly 14 may have a dustproof effect.

[0084] In some scenarios, users may wear the acoustic output device 100 during exercise, such as running, or not. Studies have found that the acoustic output device 100 occasionally exhibits poorer sound performance during exercise compared to when not in motion. Further research indicates that users generate significant amounts of sweat during exercise, which accumulates at the first pressure relief hole 104, for example, on the mesh assembly 14. This reduces the effective perforation area of ​​the first pressure relief hole 104, thereby increasing the resistance of the diaphragm 21 of the air-conducting vibrator 20 during vibration, resulting in degraded sound performance. Consequently, this also increases sound leakage in the far field of the acoustic output device 100.

[0085] In some embodiments, the mesh of the mesh assembly 14 can be improved. Specifically, the shape or size of the mesh can be adjusted to reduce water accumulation in the mesh assembly 14, thereby reducing the amount of water adhering to the mesh assembly 14 and improving the degree of blockage of the first pressure relief hole 104. In some scenarios, this can reduce the degree of sound performance degradation caused by the first pressure relief hole 104 being covered by the user's sweat, at least during user movement.

[0086] Please refer to Figure 5, which is an assembly schematic diagram of a portion of the movement assembly 1002 in the embodiment shown in Figure 3. The mesh assembly 14 may include a first mesh 141 for shielding the first pressure relief hole 104. The first mesh 141 can provide support, protection, and blocking, reducing the probability of foreign objects entering the first pressure relief hole 104.

[0087] The first partition 141 can be embedded in the first pressure relief hole 104, or it can be fixed in the first pressure relief hole 104 by means of adhesive, snap-fit, etc., to achieve the shielding of the first pressure relief hole 104. In some embodiments, at least a portion of the first partition 141 can be exposed on the outside of the housing 10.

[0088] The first mesh 141 may be a mesh structure made of metal or other materials.

[0089] Referring to Figure 5, the mesh assembly 14 may further include a second mesh 142 for shielding the first pressure relief hole 104. The second mesh 142 may be closer to the first pressure relief hole 104 than the first mesh 141. That is, the second mesh 142 and the first mesh 141 cooperate with each other and are used to shield the first pressure relief hole 104.

[0090] In some embodiments, the first mesh 141 can shield the first pressure relief hole 104 on the outside of the housing 10, and the second mesh 142 can shield the first pressure relief hole 104 on the inside of the first mesh 141.

[0091] In some embodiments, the second mesh 142 may be provided with support for the first mesh 141. In some embodiments, the second mesh 142 may be spaced apart from the first mesh 141 to reduce the possibility of water passing through the first mesh 141 and contacting the second mesh 142, and in some scenarios, to reduce the possibility of water adhering between the first mesh 141 and the second mesh 142.

[0092] In some embodiments, the second mesh 142 may be an acoustic mesh. In some embodiments, the second mesh 142 may be a mesh or other mesh material that can act as a sound barrier.

[0093] Please refer to Figures 6 and 7. Figure 6 is a structural schematic diagram of the movement assembly 1002 in the embodiment shown in Figure 5 in some other embodiments, and Figure 7 is a structural schematic diagram of the first mesh 141 in the embodiment shown in Figure 6. The first mesh 141 is provided with a plurality of mesh holes 1411 penetrating the first mesh 141, which can then play the role of transmitting air-conducted sound. This allows the air-conducted sound generated by the air-conducted vibrator 20 to be transmitted from the second acoustic cavity 202 to the first pressure relief hole 104, and then from the first pressure relief hole 104 to the mesh holes 1411, and finally to the outside of the housing 10.

[0094] In some embodiments, multiple mesh openings 1411 are distributed alternately in the first mesh 141, which is beneficial to increasing the total through-hole area of ​​the first mesh 141 without increasing the area of ​​a single mesh opening 1411, and is beneficial to the transmission of sound waves in the second acoustic cavity 202. It is understood that increasing the area of ​​a single mesh opening 1411 is detrimental to the protective effect of the first mesh 141.

[0095] Figure 8 is a schematic diagram of the outline formed by the mesh 1411 on the outer surface of the first mesh 141 in the embodiment shown in Figure 7. At least one mesh 1411 forms an outline 1401 on the outer surface of the first mesh 141, wherein one outline 1401 corresponds to one mesh 1411. At least one outline 1401 may be a closed outline. Of course, in some cases, at least one outline 1401 may be a non-closed outline. The outline 1401 shown in Figure 8 is a closed outline and corresponds to one mesh 1411.

[0096] As an example, the following description takes one of the meshes 1411 with a closed outline as an example for further explanation.

[0097] The contour line 1401 may have a minimum circumscribed sphere 1402, and correspondingly, the minimum circumscribed sphere 1402 may have a center O. In at least a portion of the contour line 1401, the distance P between a point on the contour line 1401 and the center O varies along the circumference of the contour line 1401. It is understood that the contour line 1401 in Figure 8 can also form a minimum circumscribed sphere 1402 when it is not closed, and thus, in at least a portion of the contour line 1401, the distance P between a point on the contour line 1401 and the center O varies along the circumference of the contour line 1401.

[0098] For the outline 1401, based on the outer surface design of the first mesh 141, it can also be located on the same plane, and the smallest circumscribed sphere 1402 can be replaced with the smallest circumscribed circle, and the center of the sphere O can be replaced with the center of the smallest circumscribed circle.

[0099] Of course, based on the outer surface design of the first mesh 141, all segments on the outline 1401 may not be located on the same plane.

[0100] Research has found that water forms a curved surface due to surface tension, which is well-suited to the smooth edges of a circle. Consequently, the edges of the circular mesh are more suitable for water accumulation, causing the circular mesh to be blocked by a water film.

[0101] When the distance P in the aforementioned embodiments is not completely equal, it indicates that the mesh 1411 is a non-circular mesh. This makes it easier to disrupt the tension balance when water adheres to the mesh 1411, making it less likely for water to accumulate inside the mesh 1411 and improving the degree of blockage of the first pressure relief hole 104. In some scenarios, this can at least improve the phenomenon of sweat accumulation in the mesh 1411 during user movement, thereby reducing the degree of sound performance degradation caused by the first pressure relief hole 104 being covered by user sweat.

[0102] In some embodiments, the distance P between a point on the contour line 1401 and the center of the sphere O varies along the circumference of the contour line 1401, which helps to increase the difficulty of water accumulation in the mesh 1411 and reduce the risk of water film blocking the mesh 1411.

[0103] In some embodiments, the outline 1401 may be a polygon with multiple straight sides 1412, which helps to reduce the smoothness of the inner wall of the mesh 1411, increase the difficulty of water film adhering to the inner wall of the mesh 1411, and reduce the risk of water film blocking the mesh 1411.

[0104] In some embodiments, the number of sides of the contour line 1401 is any one of 3, 4, 5, and 6. This helps to reduce the smoothness of the inner wall of the mesh 1411, increases the difficulty of water film adhering to the inner wall of the mesh 1411, and reduces the risk of water film blocking the mesh 1411. Please refer to Figures 9, 10, and 11. Figure 9 is a schematic diagram of the structure of the contour line 1401 in the embodiment shown in Figure 8 with 3 sides in some embodiments. Figure 10 is a schematic diagram of the structure of the contour line 1401 in the embodiment shown in Figure 8 with 4 sides in some embodiments. Figure 11 is a schematic diagram of the structure of the contour line 1401 in the embodiment shown in Figure 8 with 5 sides in some embodiments.

[0105] Please refer to Figures 8 and 9. The vertices of the outline 1401 can be rounded to form a curved edge 1413. The curved edge 1413 facilitates the processing of the mesh 1411 in the first mesh 141, reducing the processing difficulty. In addition, the mesh 1411 can be enlarged in a limited space to ensure the sound performance of the acoustic output device 100.

[0106] In some embodiments, the curved edge 1413 may be an arc-shaped edge.

[0107] In some embodiments, in the outline 1401, among the three sides connected in sequence, only the middle side is a straight side 1412 or a curved side 1413.

[0108] In some embodiments, in the outline 1401, a curved edge 1413 connects two adjacent straight edges 1412.

[0109] In some embodiments, the diameter C of the minimum circumscribed ball 1402 is not less than 0.4 mm, which not only facilitates the processing of the mesh 1411, but also helps to reduce the risk of water film blocking the mesh 1411.

[0110] Referring to Figures 3 and 4, the housing 10 may have a first direction X, a second direction Y, and a third direction Z that are orthogonal to each other. In the wearing state, the first direction X may be the coronal axis direction, or a direction that forms an angle with the coronal axis. In the wearing state, the second direction Y may be the sagittal axis direction, or a direction that forms an angle with the sagittal axis. In the wearing state, the third direction Z may be the vertical axis direction, or a direction that forms an angle with the vertical axis.

[0111] In some embodiments, the housing 10 may include a first housing wall 1101 and a second housing wall 1102 disposed at intervals along a first direction X. In the wearing state, the first housing wall 1101 may face the user's head, and the second housing wall 1102 is disposed on the side of the first housing wall 1101 away from the user's head.

[0112] In some embodiments, when worn, the first shell wall 1101 may face the facial region M in front of the user's ear 200, and the second shell wall 1102 may be located on the side of the first shell wall 1101 away from the facial region M. In some embodiments, the first shell wall 1101 may contact the facial skin at the facial region M.

[0113] In some embodiments, when worn, the sound outlet 103 may be disposed on the side of the housing 10 facing the ear 200. In some embodiments, when worn, the sound outlet 103 is disposed along the second direction Y on the side of the housing 10 facing the ear 200.

[0114] In some embodiments, the housing 10 further includes a third housing wall 1103 connecting the first housing wall 1101 and the second housing wall 1102. In some embodiments, a first pressure relief hole 104 is disposed on the third housing wall 1103. In some embodiments, a first mesh 141 is fixed to the third housing wall 1103. In some embodiments, the first mesh 141 is connected to the outside of the third housing wall 1103 or embedded in the third housing wall 1103. Of course, when the location of the first pressure relief hole 104 changes, the first mesh 141 may be connected to the outside of other housing walls of the housing 10.

[0115] When worn, the third shell wall 1103 can be set along the third direction Z on the side of the shell 10 away from the top of the user's head, so that the first pressure relief hole 104 is located at a lower position on the vertical axis. When sweat flows on the surface of the shell 10, at least some of the sweat flows at a lower position along the vertical axis and is easy to accumulate at the first pressure relief hole 104. By setting non-circular mesh holes 1411 in the first mesh 141, it is beneficial to improve the degree of blockage of the first pressure relief hole 104.

[0116] In addition, the location of the first pressure relief hole 104 helps to reduce the risk of sound leakage caused by sound waves propagating through the first pressure relief hole 104 being heard by the user.

[0117] In some embodiments, the housing 10 is provided with a second pressure relief hole 105 communicating with the second acoustic cavity 202. When the first pressure relief hole 104 is affected by sweat, the second pressure relief hole 105 can assist the first pressure relief hole 104 in relieving pressure, allowing air to enter and exit the second acoustic cavity 202, compensating for the deficiencies of the first pressure relief hole 104 after being affected by sweat. The second pressure relief hole 105 can also reduce the resistance of the diaphragm 21 of the air-conducting vibrator 20 during vibration, and can also cooperate with the sound outlet 103 to reduce sound leakage of the acoustic output device 100 in the far field.

[0118] Understandably, when the acoustic output device 100 is worn, the first pressure relief hole 104 may be blocked by sweat, or even by dust, oil, water, obstacles, etc. The setting of the second pressure relief hole 105 can improve the shortcomings caused by the blockage of the first pressure relief hole 104 and reduce the impact of the blockage of the first pressure relief hole 104 on the sound performance of the acoustic output device 100.

[0119] In some embodiments, the second pressure relief hole 105 is disposed on the second shell wall 1102, and thus the position is different from that of the first pressure relief hole 104, reducing the probability that the first pressure relief hole 104 and the second pressure relief hole 105 are blocked at the same time.

[0120] When worn, the second shell wall 1102 is located on the side of the first shell wall 1101 away from the user's head, thus avoiding contact with the user's facial skin and greatly reducing the likelihood of sweat flowing from the user's skin to the second pressure relief hole 105. Of course, the second pressure relief hole 105 can also be provided on other shell walls of the housing 10 as needed.

[0121] In some embodiments, the opening area of ​​the second pressure relief hole 105 may be smaller than the opening area of ​​the first pressure relief hole 104.

[0122] Please refer to Figure 12, which is a schematic diagram of the orthographic projection of the first mesh 141 on the reference plane defined by the first direction X and the second direction Y in the embodiment shown in Figure 7. The minimum distance D between the mesh opening 1411 and the edge of the first mesh 141 is not less than 0.8 mm. This helps to simplify the processing and manufacturing process of the first mesh 141, save the processing and manufacturing cost of the first mesh 141, and also helps to reduce the impact of the mesh opening 1411 on the structural strength and stiffness of the first mesh 141, thereby reducing the risk of damage or deformation of the first mesh 141. Herein, distance D refers to the minimum distance between the edge of the mesh opening 1411 and the edge of the first mesh 141 on the outer surface of the first mesh 141.

[0123] In some embodiments, the reference plane may be parallel to the first direction X and the second direction Y, respectively.

[0124] The multiple mesh openings 1411 may include multiple first mesh openings 1414 and multiple second mesh openings 1415. By coordinating the first mesh openings 1414 and the second mesh openings 1415, different patterns can be created to improve the appearance of the acoustic output device 100. Of course, the arrangement of the first mesh openings 1414 and the second mesh openings 1415 can also be adjusted according to the needs of those skilled in the art.

[0125] In some embodiments, the diameter of the minimum circumscribed ball of the outline of the first mesh 1414 is smaller than the diameter of the minimum circumscribed ball of the outline of the second mesh 1415.

[0126] In some embodiments, the outline of the first mesh 1414 is the outline 1401 described in any of the foregoing embodiments. In some embodiments, the outline of the second mesh 1415 is the outline 1401 described in any of the foregoing embodiments.

[0127] In some embodiments, a plurality of first mesh openings 1414 are arranged around the periphery of a plurality of second mesh openings 1415. The smaller diameter of the first mesh openings 1414 strengthens the area of ​​the first mesh 141 corresponding to the first mesh opening 1414, thus providing support and fixation. The larger diameter of the second mesh openings 1415 strengthens the flexibility of the area of ​​the first mesh 1411 corresponding to the second mesh opening 1415, thus providing support and protection. In Figure 12, the first mesh openings 1414 are close to the edge of the first mesh 141, which allows the stiffness of the first mesh 141 to be maintained within a reasonable range, facilitating better connection and fixation with the third shell wall 1103 at the mesh openings 1411, and further supporting the first mesh 141. The second mesh openings 1415 are close to the center of the first mesh 141, thus providing greater flexibility when the center of the first mesh 141 is suspended, thus providing better support and protection.

[0128] In some embodiments, the plurality of first mesh openings 1414 may include not only first mesh openings 1414 and second mesh openings 1415, but may also include other mesh openings. Furthermore, in some embodiments, the diameter of the minimum circumscribed sphere of the outline of the mesh opening 1411 may be set to increase in the direction toward the center of the outer surface of the first mesh 141, thereby optimizing the intensity distribution of the first mesh 141. That is, on the outer surface of the first mesh 141, in the direction from the edge toward the center, the mesh opening 1411 closest to the center among two adjacent mesh openings 1411 has a larger diameter of its minimum circumscribed sphere.

[0129] For example, in FIG12, in the first direction X, the diameter of the minimum circumscribed ball of the mesh 1411 is set to increase in the direction toward the center of the outer surface of the first mesh 141. For example, in FIG12, in the second direction Y, the diameter of the minimum circumscribed ball of the mesh 1411 is set to increase in the direction toward the center of the outer surface of the first mesh 141.

[0130] Research has shown that the mesh assembly 14 can be improved. Specifically, the structure of the mesh assembly 14 itself, which generates capillary action, can be altered. This disrupts the tension balance of the water film covering the mesh assembly 14 based on capillary action, thereby reducing the degree of blockage of the first pressure relief hole 104. In some scenarios, this can reduce the degree of sound performance degradation caused by the user's sweat covering the first pressure relief hole 104, at least during user movement.

[0131] Please refer to Figure 13, which is a schematic diagram of the mechanism assembly 1002 in some embodiments of the embodiment shown in Figure 5. At least one elongated water-blocking groove 1441 is provided on the first mesh 141. The water-blocking groove 1441 can penetrate the first mesh 141. The water-blocking groove 1441 can alter the capillary structure of the first mesh 141 itself, thereby disrupting the tension balance of the water film covering the first mesh 141 based on capillary action, increasing the difficulty of water accumulation at the water-blocking groove 1441, and improving the problem of the first pressure relief hole 104 being blocked by the water film. In some scenarios, this can reduce the degree of sound performance degradation caused by the user's sweat covering the first pressure relief hole 104, at least during user movement.

[0132] Understandably, when water is located on the first partition 141, the elongated water-blocking groove 1441 reduces the outer surface area of ​​the first partition 141. Consequently, when it is difficult for water to accumulate in the water-blocking groove 1441, some water is more likely to accumulate on the solid structure of the outer surface of the first partition 141. The reduction in the outer surface area of ​​the first partition 141 causes water to clump together on the first partition 141 and then drip down, which helps to reduce the accumulation of water on the first partition 141 and reduce the risk of the first partition 141 being blocked by a water film.

[0133] Please refer to Figure 14, which is a schematic diagram of the structure of the first partition net 141 in the embodiment shown in Figure 13. The width M of the water-blocking groove 1441 is not less than 0.4 mm, which not only helps to reduce the probability of water film blocking the water-blocking groove 1441, but also facilitates the processing and manufacturing of the first partition net 141, saving the processing and manufacturing cost of the first partition net 141.

[0134] In some embodiments, the length L of the water-blocking groove 1441 can be set according to the needs of those skilled in the art to form an elongated hole.

[0135] In some embodiments, the number of water-blocking channels 1441 may be multiple.

[0136] In some embodiments, the water-proof groove 1441 is a through groove penetrating the first mesh 141, thereby serving to transmit air-conducted sound. This allows the air-conducted sound generated by the air-conducting vibrator 20 to be transmitted from the second acoustic cavity 202 to the first pressure relief hole 104, and then from the first pressure relief hole 104 to the water-proof groove 1441, ultimately reaching the outside of the housing 10. In some embodiments, at least a portion of the plurality of water-proof grooves 1441 are through grooves.

[0137] When worn, the third shell wall 1103 can be positioned along the third direction Z on the side of the shell 10 away from the user's head, thereby placing the first pressure relief hole 104 at a lower position on the vertical axis. When sweat flows on the surface of the shell 10, under the influence of gravity, at least some of the sweat flows downward along the vertical axis and tends to accumulate at the first pressure relief hole 104. By providing a long strip-shaped water-resistant groove 1441 in the first mesh 141, the degree of blockage of the first pressure relief hole 104 can be improved.

[0138] Please refer to Figure 15, which is a schematic diagram of the orthographic projection of the first partition 141 in the embodiment shown in Figure 14 onto a reference plane defined by the first direction X and the second direction Y. The orthographic projection of the length direction of the water-blocking channel 1441 onto the reference plane has extension components along the first direction X and the second direction Y, respectively. For example, the orthographic projection of the length direction of the water-blocking channel 1441 onto the reference plane has a first extension component 1442 along the first direction X. For example, the orthographic projection of the length direction of the water-blocking channel 1441 onto the reference plane has a second extension component 1443 along the second direction Y. The first extension component 1442 and the second extension component 1443 can make the water-blocking channel 1441 form an angle with the first direction X and the second direction Y, respectively.

[0139] When worn, the third shell wall 1103 can be positioned along the third direction Z on the side of the shell 10 away from the user's head, thereby placing the first pressure relief hole 104 at a lower position on the vertical axis. When sweat flows on the surface of the shell 10, at least some of the sweat flows downward along the vertical axis and accumulates at the first pressure relief hole 104. The angles between the water-blocking groove 1441 and the first direction X and the second direction Y respectively enable the water-blocking groove 1441 to guide the sweat and reduce the contact area between the sweat and the first mesh 141 during the guiding process, which is conducive to the sweat gathering and dripping, reducing the impact of sweat on the first pressure relief hole 104.

[0140] Referring to Figure 14, multiple water-blocking grooves 1441 can be arranged at intervals. The interval N between two adjacent water-blocking grooves 1441 is not less than 0.4 mm, so as to provide as many water-blocking grooves 1441 as possible while ensuring that the rigidity of the first mesh 141 is within a reasonable range. In some embodiments, the interval distance N can be the minimum distance measured between two water-blocking grooves 1441 on the outer surface of the first mesh 141. In some embodiments, the minimum distance R between the water-blocking groove 1441 and the edge of the first mesh 141 is not less than 0.8 mm, which helps to simplify the processing and manufacturing process of the first mesh 141, save the processing and manufacturing cost of the first mesh 141, and also helps to reduce the impact of the water-blocking groove 1441 on the structural strength and rigidity of the first mesh 141, reducing the risk of damage or deformation of the first mesh 141. Here, distance R refers to the minimum distance between the edge of the water-blocking groove 1441 and the edge of the first mesh 141 on the outer surface of the first mesh 141.

[0141] Please refer to Figure 16, which is a schematic diagram of the orthographic projection of the first mesh 141 in the embodiment shown in Figure 14 onto a reference plane defined by the first direction X and the second direction Y in other embodiments. The water-blocking groove 1441 can be bent, which is beneficial for increasing the length of the water-blocking groove 1441 without increasing its width, thereby increasing the through-hole area of ​​the water-blocking groove 1441. If the width of the water-blocking groove 1441 is too large, it is detrimental to its protective effect. Increasing the length and area of ​​the water-blocking groove 1441 helps to disrupt the tension balance of the water film attached to the water-blocking groove 1441, reducing the risk of the water film blocking the water-blocking groove 1441. Of course, the water-blocking groove 1441 in the above embodiments can also be bent along its length.

[0142] In some embodiments, the shapes of different water-blocking channels 1441 may also be different.

[0143] Please refer to Figure 17, which is a schematic orthographic projection of the first mesh 141 in the embodiment shown in Figure 14 onto a reference plane defined by the first direction X and the second direction Y in other embodiments. There are multiple mesh openings 1411. In some embodiments, some mesh openings 1411 may communicate with a water-blocking groove 1441. In some embodiments, there may be multiple mesh openings 1411 communicating with the same water-blocking groove 1441, and they may be spaced apart along the length of the water-blocking groove 1441.

[0144] Please refer to Figure 18, which is a schematic diagram of the orthographic projection of the first mesh 141 in the embodiment shown in Figure 14 onto a reference plane defined by the first direction X and the second direction Y in other embodiments. The mesh 1411 may be arranged around the periphery of a plurality of water-blocking grooves 1441.

[0145] In some embodiments, at least a portion of the mesh openings 1411 have a diameter less than or equal to the width M of the water-resistant groove 1441 at the minimum circumscribed sphere 1402 of the outline of the outer surface of the first partition 141. Limiting the size of the mesh openings 1411 allows the rigidity of the first partition 141 to be maintained within a reasonable range, enabling better connection and fixation to the third shell wall 1103 at the mesh openings 1411, thus providing support for the first partition 141. In some embodiments, the diameter of the minimum circumscribed sphere of the first mesh opening 1414 at the outline of the outer surface of the first partition 141 is less than or equal to the width M of the water-resistant groove 1441. In some embodiments, the diameter of the minimum circumscribed sphere of the second mesh opening 1415 at the outline of the outer surface of the first partition 141 is less than or equal to the width M of the water-resistant groove 1441.

[0146] In some embodiments, a number of mesh openings 1411 may be arranged in the area where multiple water-blocking grooves 1441 are provided, as shown in FIG17. By providing water-blocking grooves 1441 on the outer surface of the first mesh 141, some mesh openings 1411 can communicate with the water-blocking grooves 1441. Furthermore, opening water-blocking grooves 1441 on the first mesh 141 with mesh openings 1411 facilitates processing.

[0147] Research has found that the impact of sweat on the first pressure relief hole 104 may be due to the small spacing between the layers of the mesh assembly 14, which makes it easy for sweat to penetrate from the outside to the inside and adhere to the adjacent layers, resulting in severe water accumulation in the mesh assembly 14 and increasing the degree of blockage of the first pressure relief hole 104.

[0148] In some embodiments, the layered structure of the mesh assembly 14 can be improved. Specifically, the problem of water accumulation in the mesh assembly 14 can be improved by adjusting the spacing between the layers, thereby reducing the degree of blockage of the first pressure relief hole 104. In some scenarios, the degree of sound performance degradation caused by the first pressure relief hole 104 being covered by the user's sweat can be reduced, at least during user movement.

[0149] Referring to Figure 5, the minimum spacing between the first mesh 141 and the second mesh 142 can be limited to not less than 0.2 mm. By controlling the minimum spacing between the first mesh 141 and the second mesh 142, it is beneficial to reduce the probability of water accumulating between the first mesh 141 and the second mesh 142, and improve the degree to which the first pressure relief hole 104 is blocked by sweat. In some scenarios, the minimum spacing between the first mesh 141 and the second mesh 142 can at least reduce the degree of sound performance degradation caused by the first pressure relief hole 104 being covered by the user's sweat during user movement.

[0150] In some embodiments, the second partition 142 may be stacked with the first partition 141, and the minimum spacing between the first partition 141 and the second partition 142 may be the spacing between the second partition 142 and the first partition 141 in the stacking direction.

[0151] In some embodiments, the air-conducting sound generated by the air-conducting vibrator 20 can propagate within the first pressure relief hole 104. In the propagation direction, the second partition 142 and the first partition 141 can be arranged in sequence to shield the first pressure relief hole 104 respectively, thus achieving a coordinated effect.

[0152] In some embodiments, the first partition 141 is closer to the outer side of the housing 10 than the second partition 142, thereby supporting and protecting the second partition 142 through the first partition 141.

[0153] In some embodiments, the second mesh 142 may shield the first pressure relief hole 104 inside the housing 10. In some embodiments, the second mesh 142 may shield the first pressure relief hole 104 within the first pressure relief hole 104. In some embodiments, the second mesh 142 may shield the first pressure relief hole 104 within the second acoustic cavity 202. In some embodiments, the second mesh 142 may be indirectly provided under the support of the first mesh 141, and maintain a minimum spacing distance between the first mesh 141 and the second mesh 142 along the stacking direction; that is, the second mesh 142 may be provided on the first mesh 141.

[0154] In some embodiments, the second partition 142 may be directly fixed to the first partition 141.

[0155] Please refer to Figures 19, 20, and 21. Figure 19 is a partial structural schematic diagram of the mesh assembly 14 in the embodiment shown in Figure 5 in some other embodiments. Figure 20 is a partial structural schematic diagram of the mesh assembly 14 in the embodiment shown in Figure 19 from another perspective. Figure 21 is a partial structural schematic diagram of the housing 10 in the embodiment shown in Figure 4. The mesh assembly 14 may also include a mesh support 143. The mesh support 143 can be used to support and fix the second mesh 142. The mesh support 143 facilitates the support of the second mesh 142, improves the stability of the connection of the second mesh 142 to the housing 10, ensures that the distance between the second mesh 142 and the first mesh 141 is not less than the aforementioned minimum interval distance, and also facilitates the overall assembly of the housing 10, simplifying the assembly process of the second mesh 142 on the housing 10.

[0156] In some embodiments, the mesh support 143 can be fixed to the first mesh 141 to achieve an interval between the first mesh 141 and the second mesh 142. In this case, at least a portion of the mesh support 143 can be disposed within the first pressure relief hole 104 (as shown in FIG21).

[0157] In some embodiments, the mesh support 143 can be disposed inside the housing 10 (as shown in FIG. 21) and can be assembled and connected to the shell wall of the housing 10 to achieve the spacing between the first mesh 141 and the second mesh 142. A portion of the shell wall structure is located between the first mesh 141 and the second mesh 142, which helps to increase the minimum spacing between the first mesh 141 and the second mesh 142, reducing the risk of sweat simultaneously adhering to both meshes. Additionally, in some scenarios, the minimum spacing between the first mesh 141 and the second mesh 142 can be adjusted by adjusting the shell wall thickness of the housing 10. In some scenarios, the minimum spacing between the first mesh 141 and the second mesh 142 can also be adjusted by adjusting the thickness or shape of the mesh support 143.

[0158] In some embodiments, the second mesh 142 may be disposed on the side of the mesh support 143 away from the first mesh 141, which helps to increase the minimum spacing between the first mesh 141 and the second mesh 142 and reduce the risk of sweat adhering to both the first mesh 141 and the second mesh 142 simultaneously. Of course, the second mesh 142 may also be disposed on the side of the mesh support 143 closer to the first mesh 141.

[0159] Understandably, the position of the second mesh 142 on the mesh support 143 can be adjusted according to the needs of those skilled in the art. In addition, the mesh support 143 can also be omitted, and the second mesh 142 can be directly fixed to the shell wall of the housing 10 at the first pressure relief hole 104. For example, the side of the second mesh 142 facing away from or close to the first mesh 141 can be fixed to the shell wall of the housing 10 at the first pressure relief hole 104.

[0160] Referring to Figure 4, the housing 10 also includes a fourth housing wall 1104 connecting the first housing wall 1101 and the second housing wall 1102. The fourth housing wall 1104 may be disposed opposite to the third housing wall 1103 in a third direction Z.

[0161] When worn, the fourth shell wall 1104 is positioned along the third direction Z on the side of the shell 10 facing the user's head.

[0162] In some embodiments, the housing 10 may include a fifth housing wall 1105 and a sixth housing wall 1106 spaced apart along a second direction Y. Both the fifth housing wall 1105 and the sixth housing wall 1106 may be connected to the first housing wall 1101, the second housing wall 1102, the third housing wall 1103, and the fourth housing wall 1104. In the second direction Y, the fifth housing wall 1105 may be closer to the ear portion 200 than the sixth housing wall 1106. In some embodiments, a sound outlet 103 may be disposed on the fifth housing wall 1105.

[0163] In some embodiments, shell walls such as the first shell wall 1101, the second shell wall 1102, the third shell wall 1103, the fourth shell wall 1104, the fifth shell wall 1105, and the sixth shell wall 1106 may be arranged to form a shell 10.

[0164] In some embodiments, a first housing 11 may be formed by at least a second housing wall 1102, a third housing wall 1103, a fourth housing wall 1104, and a sixth housing wall 1106. In some embodiments, a fifth housing wall 1105 may detach from the housing 10 to form an independent structure, referred to as a cover 12. In some embodiments, a first housing wall 1101 may detach from the housing 10 to form an independent structure, referred to as a second housing 13. Furthermore, in some embodiments, the housing 10 may include a first housing 11, a cover 12, and a second housing 13. The first housing 11 may be connected to the cover 12 in the second direction Y and to the second housing 13 in the first direction X. Alternatively, the cover 12 and the second housing 13 may be connected. The assembly method of the first housing 11, the cover 12, and the second housing 13 facilitates the assembly and processing of the housing 10.

[0165] In some embodiments, shell walls such as the second shell wall 1102, the third shell wall 1103, the fourth shell wall 1104, the fifth shell wall 1105, and the sixth shell wall 1106 may be arranged to form the first shell 11. That is, the cover 12 may also be part of the first shell 11.

[0166] It is understood that the first shell 11 is not limited to the second shell wall 1102, the third shell wall 1103, the fourth shell wall 1104, and the sixth shell wall 1106, but may include others. Of course, the first shell 11 may also have other structural forms. The cover 12 is not limited to the fifth shell wall 1105, but may include others. Of course, the cover 12 may also have other structural forms. The second shell 13 is not limited to the first shell wall 1101, but may include others. Of course, the second shell 13 may also have other structural forms.

[0167] Please refer to Figure 4. The cover 12 can be placed on the end face of the second shell wall 1102. It can also be placed on the end faces of the first shell wall 1101, the third shell wall 1103, and the fourth shell wall 1104. Of course, it can also be placed on the second shell 13.

[0168] Referring to Figure 21, a first limiting groove 106 is provided on the first housing 11. The first limiting groove 106 can be used to accommodate at least a portion of the structure of the mesh support 143, so that the second mesh 142 and the mesh support 143 can be installed on the first housing 11. In some embodiments, the mesh support 143 can be inserted into the first limiting groove 106 and connected through the first housing 11 and the second housing 13 to achieve assembly and fixation of the mesh support 143, which facilitates the assembly of the acoustic output device 100 and improves the stability of the mesh support 143 connected to the first housing 11.

[0169] Please refer to Figure 22, which is a schematic diagram of the structure of the second housing 13 and the mesh assembly 14 in the embodiment shown in Figure 4. The second housing 13 is provided with a second limiting groove 107, which can be used to accommodate at least a portion of the structure of the mesh support 143, enabling the installation of the second mesh 142 and the mesh support 143 on the second housing 13. In some embodiments, the mesh support 143 can be inserted into the second limiting groove 107 and connected through the first housing 11 and the second housing 13 to achieve assembly and fixation of the mesh support 143, facilitating the assembly of the acoustic output device 100 and improving the stability of the mesh support 143 connected to the second housing 13.

[0170] In some embodiments, at least one of the first limiting groove 106 and the second limiting groove 107 may be omitted.

[0171] In some embodiments, the direction in which the mesh support 143 is inserted into the first limiting groove 106 and / or the second limiting groove 107 may be consistent with the snapping direction of the first housing 11 and the second housing 13, which is beneficial for the assembly and fixing of the mesh support 143, facilitates the assembly of the acoustic output device 100, and improves the stability of the mesh support 143 connecting the first housing 11 and the second housing 13.

[0172] In some embodiments, the snap-fit ​​direction of the first housing 11 and the second housing 13 may be the first direction X, or it may be different from the first direction X.

[0173] Please refer to Figure 21. One end of the mesh support 143 can be inserted into the first limiting groove 106 of the first housing 11 along the fastening direction, which is beneficial for the assembly and fixing of the mesh support 143, facilitates the assembly of the acoustic output device 100, and improves the stability of the mesh support 143 connected to the first housing 11.

[0174] Please refer to Figure 22. One end of the mesh support 143 can be inserted into the second limiting groove 107 of the second housing 13 along the fastening direction, which is beneficial for the assembly and fixing of the mesh support 143, facilitates the assembly of the acoustic output device 100, and improves the stability of the mesh support 143 connected to the second housing 13.

[0175] In some embodiments, one end of the mesh support 143 can be inserted into the first limiting groove 106 of the first housing 11 along the fastening direction, and the other end can be inserted into the second limiting groove 107 of the second housing 13 along the fastening direction. This is beneficial for the assembly and fixing of the mesh support 143, facilitates the assembly of the acoustic output device 100, and improves the stability of the mesh support 143 in connecting the first housing 11 and the second housing 13.

[0176] Referring to Figure 5, the first pressure relief hole 104 includes two sub-pressure relief holes, such as a first sub-pressure relief hole 1041 and a second sub-pressure relief hole 1042. The first sub-pressure relief hole 1041 may be provided on the first housing 11. The second sub-pressure relief hole 1042 may be provided on the second housing 13.

[0177] In some embodiments, the first sub-pressure relief hole 1041 and the second sub-pressure relief hole 1042 may not be connected on the third shell wall 1103, which is beneficial to strengthening the structural strength of the shell 10 at the first pressure relief hole 104. Of course, the first sub-pressure relief hole 1041 and the second sub-pressure relief hole 1042 may also be connected on the third shell wall 1103.

[0178] In some embodiments, the first sub-pressure relief hole 1041 and the second sub-pressure relief hole 1042 may be connected or not connected to the housing 10.

[0179] Please refer to Figure 19. The mesh support 143 has two sound-guiding windows spaced apart along the fastening direction, such as a first sound-guiding window 1431 and a second sound-guiding window 1432. Compared to having a single, larger sound-guiding window on the mesh support 143, this arrangement strengthens the structure of the mesh support 143 and reduces the risk of deformation or damage. The second mesh 142 can shield the first and second sound-guiding windows 1431 and can be more firmly supported by the mesh support 143.

[0180] Please refer to Figure 21. The first sound guiding window 1431 can be set to correspond with the first sub-pressure relief hole 1041. The air-guided sound generated by the air-guided vibrator 20 can be transmitted from the second acoustic cavity 202 to the first pressure relief hole 104, such as the first sub-pressure relief hole 1041, and then transmitted from the first sound guiding window 1431 and the first sub-pressure relief hole 1041 to the mesh 1411, and finally transmitted to the outside of the housing 10.

[0181] Please refer to Figure 22. The second sound guide window 1432 can be set to correspond with the second sub-pressure relief hole 1042. The air-guided sound generated by the air-guided vibrator 20 can be transmitted from the second acoustic cavity 202 to the first pressure relief hole 104, such as the second sub-pressure relief hole 1042, and then transmitted from the second sound guide window 1432 and the second sub-pressure relief hole 1042 to the mesh 1411, and finally transmitted to the outside of the housing 10.

[0182] Referring to Figure 21, a first stop portion 1107 is provided on the first housing 11. The first stop portion 1107 can be connected to the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106. In some embodiments, the first stop portion 1107 can be connected to the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106 to form a first limiting groove 106. Then, when the mesh bracket 143 is inserted into the first limiting groove 106 of the first housing 11, it can abut against the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106, or at least abut against the inner wall surface of the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106. In some embodiments, the first stop portion 1107 is disposed within the first housing 11, for example, on the inner side of the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106. In some embodiments, the first stop portion 1107 may not be connected to the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106 to form a first limiting groove 106, but may be located within the first limiting groove 106. In some embodiments, the first limiting groove 106 is formed in the first stop portion 1107, and / or formed on the second housing wall 1102, the third housing wall 1103, and the sixth housing wall 1106. In some embodiments, the first stop portion 1107 is used to connect to or abut against the mesh support 143, such that the mesh support 143 abuts against the inner wall surface of the housing wall.

[0183] Of course, the first limiting groove 106 may be formed in ways not limited to those listed here.

[0184] Referring to Figure 22, a second stop portion 1108 is provided on the second housing 13. The second stop portion 1108 can be connected to a shell wall of the second housing 13, such as the first shell wall 1101. In some embodiments, the second stop portion 1108 can be connected to a shell wall of the second housing 13, such as the first shell wall 1101, to form a second limiting groove 107. Then, when the mesh bracket 143 is inserted into the second limiting groove 107 of the second housing 13, it can abut against a shell wall of the second housing 13, such as the first shell wall 1101, or at least abut against the inner wall surface of the shell wall of the second housing 13, such as the first shell wall 1101. In some embodiments, the second stop portion 1108 is provided on the inner side of a shell wall of the second housing 13, such as the first shell wall 1101. In some embodiments, when the mesh support 143 is inserted into the second limiting groove 107 of the second housing 13, it can abut against the shell walls such as the second shell wall 1102, the third shell wall 1103, and the sixth shell wall 1106, or at least abut against the inner wall surfaces of the shell walls such as the second shell wall 1102, the third shell wall 1103, and the sixth shell wall 1106. In some embodiments, the second stop portion 1108 may not be connected to the shell wall of the second housing 13, such as the first shell wall 1101, to form the second limiting groove 107, but may be located within the second limiting groove 107. In some embodiments, the second limiting groove 107 is formed in the second stop portion 1108, and / or formed on the shell wall of the second housing 13, such as the first shell wall 1101. In some embodiments, the second stop portion 1108 is used to connect to or abut against the mesh support 143, such that the mesh support 143 abuts against the inner wall surface of the shell wall.

[0185] Of course, the second limiting groove 107 may be formed in ways not limited to those listed here.

[0186] Understandably, one of the two stop portions 1107 and 1108 may be omitted. In some embodiments, the two stop portions 1107 and 1108 are an integral structure. In some embodiments, the first stop portion 1107 is formed on the second housing 13 and mates with the first housing 11. In some embodiments, the second stop portion 1108 is formed on the first housing 11 and mates with the second housing 13.

[0187] Referring to Figure 4, the housing 10 also includes a partition wall 111. The partition wall 111 is used to divide the internal space of the housing 10 into a first accommodating cavity 101 and a second accommodating cavity 102 that are spaced apart from each other. After the internal space of the housing 10 is divided, it can be partitioned for different functions of the acoustic output device 100 to improve space utilization and reduce the mutual influence between different functional components. In some embodiments, the first accommodating cavity 101 and the second accommodating cavity 102 are arranged in the second direction Y, and the first accommodating cavity 101 is closer to the ear 200 than the second accommodating cavity 102. Furthermore, when the air-conducting vibrator 20 is disposed in the first accommodating cavity 101, the transmission path of the sound generated by the vibration of the air-conducting vibrator 20 can be shortened, thereby increasing the sound pressure level of the acoustic output device 100.

[0188] In some embodiments, the sound outlet 103, the first pressure relief hole 104, and the second pressure relief hole 105 may be connected to the first accommodating cavity 101.

[0189] In some embodiments, the first accommodating cavity 101 may be formed by a partition wall 111, a first shell wall 1101, a second shell wall 1102, a third shell wall 1103, a fourth shell wall 1104, and a fifth shell wall 1105.

[0190] In some embodiments, the first accommodating cavity 101 may be formed by a partition wall 111, a second shell wall 1102, a third shell wall 1103, a fourth shell wall 1104, and a fifth shell wall 1105.

[0191] In some embodiments, the first accommodating cavity 101 may be formed by connecting the first housing 11 and the cover 12.

[0192] In some embodiments, the first housing 11 may have a first sub-accommodating cavity 1011, and the cover 12 may have a second sub-accommodating cavity 1012. When the first housing 11 and the cover 12 are connected, the first sub-accommodating cavity 1011 and the second sub-accommodating cavity 1012 form the first accommodating cavity 101.

[0193] In some embodiments, the first acoustic cavity 201 and the second acoustic cavity 202 may be disposed within the first accommodating cavity 101. In some embodiments, the first acoustic cavity 201 is located on the side of the diaphragm 21 facing the fifth shell wall 1105, and the second acoustic cavity 202 is located on the side of the diaphragm 21 facing the spacer wall 111.

[0194] In some embodiments, the second accommodating cavity 102 may be formed by a partition wall 111, a first shell wall 1101, a second shell wall 1102, a third shell wall 1103, a fourth shell wall 1104 and a sixth shell wall 1106.

[0195] In some embodiments, the second accommodating cavity 102 may be formed by connecting the first housing 11 and the second housing 13.

[0196] In some embodiments, the first housing 11 may have a third sub-accommodating cavity 1021, and the second housing 13 may have a fourth sub-accommodating cavity 1022. When the first housing 11 and the second housing 13 are connected, the third sub-accommodating cavity 1021 and the fourth sub-accommodating cavity 1022 form the second accommodating cavity 102.

[0197] Referring to Figure 4, the mechanism assembly 1002 may further include a bone conduction vibrator 30 disposed within the second accommodating cavity 102. The bone conduction vibrator 30 can generate bone conduction sound. In some embodiments, the first shell wall 1101 may contact the facial skin at the facial region M, thereby allowing the bone conduction vibrator 30 to drive a physical load (e.g., the first shell wall 1101, user tissue, bones, etc.) to generate bone conduction sound.

[0198] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0199] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0200] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0201] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An acoustic output device, wherein, The acoustic output device includes a housing and an air-conducting vibrator. The air-conducting vibrator is disposed inside the housing. The housing has a first acoustic cavity and a second acoustic cavity. The first acoustic cavity and the second acoustic cavity are respectively located on both sides of the diaphragm of the air-conducting vibrator. The housing is provided with a sound outlet and a first pressure relief hole. The sound outlet communicates with the first acoustic cavity, and the first pressure relief hole communicates with the second acoustic cavity. The acoustic output device further includes a first partition and a second partition, both of which are connected to the housing and are used to shield the first pressure relief hole. Along the propagation direction of the air-conducted sound generated by the air-conducting vibrator in the first pressure relief hole, the second partition and the first partition are arranged in sequence, and the first partition is closer to the outside of the housing than the second partition. The minimum spacing between the first mesh and the second mesh is not less than 0.2 mm.

2. The acoustic output device according to claim 1, wherein, At least a portion of the first mesh is exposed on the outside of the housing, and the second mesh is connected to the first pressure relief hole or the first acoustic cavity.

3. The acoustic output device according to claim 2, wherein, The acoustic output device further includes a mesh support bracket, which is disposed inside the housing and connected to the housing, and the second mesh is disposed on the mesh support bracket.

4. The acoustic output device according to claim 3, wherein, The second partition net is disposed on the side of the partition net support opposite to the first partition net.

5. The acoustic output device according to claim 3, wherein, The housing includes a first housing and a second housing, which are fastened together. The inner side of the first housing is provided with a first limiting groove, and at least a portion of the structure of the mesh support is inserted into the first limiting groove along the fastening direction of the first housing and the second housing; And / or, a second limiting groove is provided on the inner side of the second housing, and at least a portion of the structure of the mesh support is inserted into the second limiting groove along the fastening direction of the first housing and the second housing.

6. The acoustic output device according to claim 5, wherein, Along the fastening direction, one end of the mesh support is inserted into the first limiting groove, and the other end is inserted into the second limiting groove.

7. The acoustic output device according to claim 6, wherein, The first pressure relief hole includes two sub-pressure relief holes, one of which is located in the first housing and the other is located in the second housing. The second mesh is configured to simultaneously shield the two sub-pressure relief holes.

8. The acoustic output device according to claim 7, wherein, The partition support is provided with two sound guiding windows, which are spaced apart along the fastening direction and respectively correspond to the two sub-pressure relief holes. The second partition is configured to simultaneously cover the two sound guiding windows.

9. The acoustic output device according to claim 6, wherein, The first housing and / or the second housing includes a housing wall and a stop portion, the stop portion being disposed on the inner side of the housing wall and spaced apart from the inner wall surface of the housing wall, and the first limiting groove and / or the second limiting groove being located on the housing wall and the stop portion; When the mesh support is inserted into the first limiting groove and / or the second limiting groove, the stop part is used to connect the mesh support, so that the mesh support abuts against the inner wall surface of the shell.

10. The acoustic output device according to any one of claims 1-9, wherein, The first partition mesh and the second partition mesh are stacked.

11. An acoustic output device, wherein, The acoustic output device includes a housing and an air-conducting vibrator. The air-conducting vibrator is disposed inside the housing. The housing has a first acoustic cavity and a second acoustic cavity. The first acoustic cavity and the second acoustic cavity are respectively located on both sides of the diaphragm of the air-conducting vibrator. The housing is provided with a sound outlet and a first pressure relief hole. The sound outlet communicates with the first acoustic cavity, and the first pressure relief hole communicates with the second acoustic cavity. The acoustic output device further includes a first mesh, which is connected to the housing and is used to shield the first pressure relief hole. The first mesh has a plurality of mesh openings that penetrate the first mesh. At least a portion of each of the plurality of mesh openings forms a contour line on the outer surface of the first mesh. The contour line has a minimum circumscribed sphere with a center. In at least a portion of the contour line, the distance between a point on the contour line and the center of the sphere varies along the circumference of the contour line.

12. The acoustic output device according to claim 11, wherein, Each edge in the same contour line lies in the same plane.

13. The acoustic output device according to claim 11, wherein, The outline is a closed outline.

14. The acoustic output device according to claim 13, wherein, The closed contour line is a polygon.

15. The acoustic output device according to claim 14, wherein, The closed contour line has no more than 6 sides.

16. The acoustic output device according to any one of claims 11-15, wherein, In the same outline, among the three sides connected in sequence, only the middle side is either a straight side or a curved side.

17. The acoustic output device according to claim 11, wherein, The diameter of the minimum circumscribed ball is not less than 0.4 mm.

18. The acoustic output device according to claim 11, wherein, The plurality of mesh openings includes a plurality of first mesh openings and a plurality of second mesh openings, wherein at least a portion of each of the plurality of first mesh openings forms the outline line on the outer surface of the first mesh, and / or at least a portion of each of the plurality of second mesh openings forms the outline line on the outer surface of the first mesh. The diameter of the minimum circumscribed ball corresponding to the first mesh is smaller than the diameter of the minimum circumscribed ball corresponding to the second mesh.

19. The acoustic output device according to claim 18, wherein, The plurality of first mesh openings are arranged around the periphery of the plurality of second mesh openings.

20. The acoustic output device according to claim 11, wherein, On the outer surface of the first mesh, along the direction from the edge toward the center, the mesh closest to the center among two adjacent meshes has a larger diameter corresponding to the smallest circumscribed ball.

21. An acoustic output device, wherein, The acoustic output device includes a housing and an air-conducting vibrator. The air-conducting vibrator is disposed within the housing. The housing has a first acoustic cavity and a second acoustic cavity, which are respectively located on both sides of the diaphragm of the air-conducting vibrator. The housing is provided with a sound outlet and a first pressure relief hole. The sound outlet communicates with the first acoustic cavity, and the first pressure relief hole communicates with the second acoustic cavity. The acoustic output device also includes a first partition, which is connected to the outside of the housing and is used to shield the first pressure relief hole. The first partition has at least one water-proof groove penetrating through it, and the water-proof groove is elongated.

22. The acoustic output device according to claim 21, wherein, The width of the water-blocking groove is not less than 0.4 mm; And / or, the minimum distance between the water-blocking groove and the edge of the first mesh is not less than 0.8 mm.

23. The acoustic output device according to claim 21, wherein, The housing has a first direction, a second direction, and a third direction that are orthogonal to each other. The housing includes a first shell wall and a second shell wall that are spaced apart along the first direction. The housing also includes a third shell wall that connects the first shell wall and the second shell wall. The first pressure relief hole is disposed on the third shell wall, and the first mesh is connected to the third shell wall. When worn, the first shell wall faces the user's head, the second shell wall is located on the side of the first shell wall away from the user's head, and the third shell wall is located on the side of the shell away from the top of the user's head along the third direction.

24. The acoustic output device according to claim 23, wherein, On a reference plane parallel to the first direction and the second direction, the length direction of the water-blocking channel has an orthographic projection, the orthographic projection has a first extension component along the first direction, and the orthographic projection also has a second extension component along the second direction.

25. The acoustic output device according to claim 23, wherein, The second shell wall is provided with a second pressure relief hole, which is connected to the second acoustic cavity.

26. The acoustic output device according to claim 21, wherein, The number of water-blocking channels is multiple, and the multiple water-blocking channels are arranged at intervals.

27. The acoustic output device according to claim 26, wherein, The distance between two adjacent water-blocking tanks shall not be less than 0.4 mm.

28. The acoustic output device according to claim 27, wherein, The first mesh also includes a plurality of mesh openings, which connect the inner surface and the outer surface of the first mesh.

29. The acoustic output device according to claim 28, wherein, The mesh is polygonal in shape.

30. The acoustic output device according to claim 21, wherein, The water-blocking channel is designed with a bend.

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