Speaker device of a head-mounted device and head-mounted device having the same

Abstract

The application discloses a loudspeaker device of a head-mounted device and a head-mounted device with the same. The loudspeaker device comprises a housing assembly and a loudspeaker assembly. The housing assembly is internally provided with a mounting cavity, a front sound cavity and a rear sound cavity. The mounting cavity comprises a plurality of sub-cavities. Each of the sub-cavities is in communication with the front sound cavity and the rear sound cavity. The loudspeaker assembly comprises a plurality of loudspeakers. Each of the loudspeakers is arranged in one of the sub-cavities in a one-to-one correspondence. According to the loudspeaker device, the acoustic performance can be improved and the sound conduction distance can be shortened in the case of limited space.

Description

Technical Field

[0001] This invention relates to the field of head-mounted device technology, and in particular to a speaker device for a head-mounted device and a head-mounted device having the same. Background Technology

[0002] Some head-mounted devices in related technologies have speaker units, which employ a single-speaker design. Each speaker unit includes only one loudspeaker, and a front and rear acoustic cavity are configured to work with this loudspeaker. The speaker unit is housed within the device's inner shell, and sound is transmitted to the listener's ears via a sound guide tube. However, as the length of the sound guide tube increases, the sound quality decreases. Additionally, some devices house the speaker unit within a strap, but the size of the speaker unit is limited by the strap's volume, thus affecting the acoustic performance. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a speaker device for a head-mounted device that can improve acoustic performance and shorten sound transmission distance in situations where space is limited.

[0004] The present invention also proposes a head-mounted device having the above-mentioned speaker device.

[0005] According to a first aspect of the present invention, a speaker device for a head-mounted device includes: a housing assembly having a mounting cavity, a front acoustic cavity, and a rear acoustic cavity therein, the mounting cavity including a plurality of sub-cavities, each sub-cavity communicating with the front acoustic cavity and each sub-cavity communicating with the rear acoustic cavity; and a speaker assembly including a plurality of loudspeakers, the plurality of loudspeakers being disposed one-to-one in the plurality of sub-cavities, such that each sub-cavity is respectively provided with one loudspeaker.

[0006] According to an embodiment of the present invention, the speaker device of the head-mounted device improves acoustic performance and shortens sound transmission distance in a limited space by setting multiple speakers to share a front acoustic cavity and multiple speakers to share a rear acoustic cavity.

[0007] In some embodiments, the two ends of the length of the housing assembly are a first end and a second end, respectively. The front acoustic cavity is located on the side of the mounting cavity near the first end, and the rear acoustic cavity is located on the side of the mounting cavity near the second end. In the length direction of the housing assembly, the length of the front acoustic cavity is less than the length of the rear acoustic cavity.

[0008] In some embodiments, the housing assembly has a sound outlet communicating with the front acoustic cavity, the sound outlet being disposed on the end face of the first end.

[0009] In some embodiments, a center of the sound hole is offset from a width center and / or a thickness center of the first end, and the sound hole occupies more than 1 / 3 of a length of the first end.

[0010] In some embodiments, the plurality of sub-cavities in the mounting cavity are arranged in sequence along a width direction of the housing assembly, so that the plurality of loudspeakers are laid side by side in the housing assembly.

[0011] In some embodiments, the housing assembly comprises a top wall and a bottom wall arranged opposite along a thickness direction, the mounting cavity comprises a top passage between the loudspeaker assembly and the top wall, each of the sub-cavities is in communication with the rear sound cavity through the top passage, and the mounting cavity further comprises a bottom passage between the loudspeaker assembly and the bottom wall, each of the sub-cavities is in communication with the front sound cavity through the bottom passage.

[0012] In some embodiments, the housing assembly comprises a support, the support comprises a frame portion and a sound portion, the frame portion defines a plurality of first limiting grooves, and the plurality of loudspeakers are one-to-one correspondingly limited and fitted in the plurality of first limiting grooves, and the sound portion defines the front sound cavity.

[0013] In some embodiments, the housing assembly further comprises a shell, the support is arranged in the shell, the shell alone defines the rear sound cavity, and the shell and the support jointly define the mounting cavity.

[0014] In some embodiments, the housing assembly is provided with a sound hole in communication with the front sound cavity and a vent hole in communication with the rear sound cavity, and the sound hole and the vent hole are arranged on the shell.

[0015] In some embodiments, the shell comprises a base and a cover plate, the base defines a mounting space open on one side along a thickness direction, the mounting space is provided with a second limiting groove, the support is arranged in the mounting space and positioned and fitted in the second limiting groove, and the cover plate is arranged on the open side of the base to jointly define the rear sound cavity with the base.

[0016] In some embodiments, the base is provided with a protruding portion protruding away from the cover plate, the second limiting groove comprises a local sunken groove corresponding to the protruding portion, and the sound portion is fitted in the local sunken groove.

[0017] In some embodiments, the loudspeaker device comprises two loudspeakers, and the two loudspeakers are the same or different.

[0018] The head-mounted device according to the second aspect of the present application comprises the loudspeaker device according to the first aspect of the present application.

[0019] The head-mounted device according to the embodiment of the present application improves the overall acoustic performance of the head-mounted device by arranging the loudspeaker device of the first aspect.

[0020] In some embodiments, the head-mounted device comprises side straps, and the loudspeaker device is arranged on the side straps.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of a loudspeaker device according to an embodiment of the present application;

[0023] Figure 2 is Figure 1 is an exploded view of the loudspeaker device shown in FIG. 1;

[0024] Figure 3 is Figure 1 is a sectional view of the loudspeaker device shown in FIG. 1;

[0025] Figure 4 is Figure 1 is another sectional view of the loudspeaker device shown in FIG. 1;

[0026] Figure 5 is Figure 2 is a perspective view of a bracket shown in FIG. 1;

[0027] Figure 6 is Figure 2 is a perspective view of a base shown in FIG. 1.

[0028] REFERENCE NUMERALS:

[0029] Loudspeaker device 1000: length direction F1; width direction F2; thickness direction F3;

[0030] Housing assembly 100;

[0031] First end 1a; second end 1b; top wall 1c; bottom wall 1d;

[0032] Mounting cavity 11; sub-cavity 111; top passage 112; bottom passage 113;

[0033] Front sound cavity 12; rear sound cavity 13; sound outlet hole 14; air vent hole 15;

[0034] Bracket 2; frame portion 21; first limiting slot 211; partition rib 212; frame 213; sound outlet portion 22;

[0035] Housing 3; base 31; mounting space 311; second limiting groove 312; protrusion 313; partial sunken groove 314;

[0036] Cover plate 32;

[0037] Loudspeaker assembly 200; loudspeaker 4. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like reference numerals identify similar elements or features throughout the figures. The embodiments described below are merely exemplary and are not intended to limit the application, other embodiments of which will be apparent to those of ordinary skill in the art.

[0039] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the elements of the specific examples described below are described with reference to particular arrangements and settings. Of course, these are merely examples and are not intended to limit the application. Furthermore, the application can be practiced with different specific configurations and / or settings than those described below. The repetition of the reference numerals and / or letters in the following description is not to be understood as a repeated conceptual significance of the different embodiments and / or arrangements discussed, but is merely intended to simplify the subsequent description.

[0040] Hereinafter, referring to the drawings, a loudspeaker device 1000 of a head-mounted device according to an embodiment of the first aspect of the present application is described.

[0041] As shown in Figure 1 and Figure 2 The loudspeaker device 1000 can include a housing assembly 100 and a loudspeaker assembly 200, the housing assembly 100 has a mounting cavity 11, a front sound cavity 12 and a rear sound cavity 13 inside, the mounting cavity 11 includes a plurality of sub-cavities 111, each sub-cavity 111 is in communication with the front sound cavity 12, and each sub-cavity 111 is in communication with the rear sound cavity 13, the loudspeaker assembly 200 includes a plurality of loudspeakers 4, and the plurality of loudspeakers 4 are arranged one-to-one in the plurality of sub-cavities 111, so that each sub-cavity 111 is respectively provided with one loudspeaker 4.

[0042] Therefore, by setting multiple loudspeakers 4 to share the front sound cavity 12 and multiple loudspeakers 4 to share the rear sound cavity 13, the overall power and acoustic effect of the loudspeaker assembly 200 can be improved. Moreover, compared to setting multiple loudspeaker units at the same time, each of which includes a loudspeaker and a front sound cavity and a rear sound cavity cooperating with the loudspeaker, the loudspeaker device 1000 of the embodiment of the present application can occupy less space as a whole because multiple loudspeakers 4 share the front sound cavity 12 and the rear sound cavity 13, and is more suitable for use in a limited space. Moreover, compared to installing multiple loudspeaker units separately, the assembly steps can be reduced, the assembly effect can be improved, and maintenance and replacement can be facilitated.

[0043] In summary, according to the loudspeaker device 1000 of the embodiment of the present application, because the loudspeaker device 1000 includes multiple loudspeakers 4 sharing a sound cavity, the acoustic performance can be improved and the sound conduction distance can be shortened in a limited space. It should be noted that the loudspeaker device 1000 of the embodiment of the present application can be arranged in the side strap, so that the distance from the loudspeaker device 1000 to the ear can be further shortened, and thus the sound guide tube can be omitted, the cost can be reduced, the structure can be simplified, and the sound quality can be improved. It can be understood that when the loudspeaker device 1000 is arranged in the side strap close to the ear, the sound quality can be better improved. Of course, the present application is not limited thereto, and in other embodiments of the present application, the loudspeaker device 1000 can also be arranged in the top strap or the middle shell of the head-mounted electronic device, which will not be described here.

[0044] It should be noted that in the loudspeaker device 1000 of the embodiment of the present application, the specific type of each loudspeaker 4 is not limited and can be selected as needed, and the specification parameters of the multiple loudspeakers 4 can be the same or different, so that the required acoustic effect can be matched and cooperated as needed.

[0045] For example, in some specific examples of the present application, as shown in Figure 2 The loudspeaker device 1000 includes two loudspeakers 4, and the two loudspeakers 4 are the same, i.e., the shape and size of the two loudspeakers 4 are consistent and the specification parameters are consistent, so that the loudspeakers 4 are interchangeable and the installation is more convenient and the assembly efficiency is improved. Moreover, while ensuring improved acoustic effect, the overall size of the loudspeaker device 1000 can be relatively smaller, which is more conducive to use in a limited space.

[0046] In some embodiments of the present application, the operation control of the two loudspeakers 4 can be designed according to actual requirements. For example, in some embodiments, the two loudspeakers 4 can be set to work simultaneously, and for example, in some other embodiments, the two loudspeakers 4 can be set to be selectively switched to work individually or simultaneously, so as to meet different actual needs.

[0047] In some embodiments of the present application, as shown in Figure 1 and Figure 2 the housing assembly 100 has a first end 1a and a second end 1b at two ends of the length direction F1 of the housing assembly 100, the front sound cavity 12 is located at one side of the mounting cavity 11 close to the first end 1a, and the rear sound cavity 13 is located at one side of the mounting cavity 11 close to the second end 1b, and the length of the front sound cavity 12 is less than the length of the rear sound cavity 13 in the length direction F1 of the housing assembly 100. That is, in the length direction F1 of the housing assembly 100, the front sound cavity 12 and the rear sound cavity 13 are located at two sides of the loudspeaker assembly 200 respectively, the length of the front sound cavity 12 is less than the length of the rear sound cavity 13, and the first end 1a close to the front sound cavity 12 and the second end 1b close to the rear sound cavity 13 are at two ends of the length direction F1 of the housing assembly 100.

[0048] Therefore, the overall structure of such a long strip-shaped loudspeaker device 1000 is small and occupies a small space, and is suitable for relatively long and narrow space applications such as a band.

[0049] In some embodiments of the present application, as shown in Figure 1 and Figure 2 the housing assembly 100 has a sound outlet hole 14 communicating with the front sound cavity 12, and the sound outlet hole 14 is arranged on the end face of the first end 1a. Therefore, the distance from the loudspeaker assembly 200 to the sound outlet hole 14 can be better ensured to be short, and the hearing effect of the human ear can be further improved.

[0050] In some embodiments of the present application, as shown in Figure 1 and Figure 2 the center of the sound outlet hole 14 deviates from the width center and / or thickness center of the first end 1a, and the sound outlet hole 14 occupies more than 1 / 3 of the length of the first end 1a. Therefore, on the one hand, the size of the sound outlet hole 14 can be ensured to be large, and the sound outlet effect can be improved, and on the other hand, the sound outlet hole 14 is relatively close to the width side and / or the thickness side of the housing assembly 100, so that the distance between the sound outlet hole 14 and the human ear can be further shortened. For example, when the loudspeaker device 1000 is used for a side band, the side band is usually located above the human ear, and the width side of the side band is close to the human ear, and the other width side of the side band is close to the top of the head. Therefore, by arranging the sound outlet hole 14 close to the width side and / or the thickness side of the housing assembly 100, the distance between the sound outlet hole 14 and the human ear can be further shortened. In addition, it is worth noting that "more than 1 / 3" includes 1 / 3 and greater than 1 / 3, for example, it can be 1 / 3, 1.1 / 3, 1.2 / 3, 1.3 / 3, 1.4 / 3, 1.5 / 3, 1.6 / 3, 1.7 / 3, 1.8 / 3, 1.9 / 3, 2 / 3, 2.1 / 3, and so on, which will not be repeated here.

[0051] In some embodiments of the present application, as shown in Figure 1 and Figure 2As shown, the shell assembly 100 is provided with a vent hole 15 communicating with the rear sound cavity 13, the vent hole 15 can be arranged on the end face of the second end 1b, and the opening area of the vent hole 15 is smaller than the opening area of the sound hole 14, so as to ensure the acoustic effect and facilitate processing. Optionally, the center of the vent hole 15 is located at the width center position of the second end 1b, so as to facilitate processing and improve the acoustic effect.

[0052] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the plurality of sub-cavities 111 in the mounting cavity 11 are arranged in sequence along the width direction F2 of the shell assembly 100, that is, the plurality of sub-cavities 111 are arranged side by side, the front sound cavity 12 is located on the same side of the plurality of sub-cavities 111, and the rear sound cavity 13 is also located on the same side of the plurality of sub-cavities 111, so that the plurality of sub-cavities 111 can be easily communicated with the front sound cavity 12 at the same time and can be easily communicated with the rear sound cavity 13 at the same time, thereby simplifying the structure and the sound transmission path and further improving the acoustic effect.

[0053] Furthermore, it can be understood that by arranging the mounting cavity 11 as above, the plurality of loudspeakers 4 can be arranged side by side and laid flat in the shell assembly 100, so that the plurality of loudspeakers 4 can sound respectively without affecting each other, thereby improving the overall acoustic effect, and the height of the loudspeaker assembly 200 in the thickness direction F3 of the shell assembly 100 can be reduced, thereby reducing the overall thickness of the loudspeaker device 1000, which is suitable for long, narrow and thin space applications such as a strap. Of course, the present application is not limited to this, and in other embodiments of the present application, each loudspeaker 4 can be arranged to be stacked along the thickness direction F3 of the shell assembly 100, and the like, which will not be described here.

[0054] Further, when the plurality of loudspeakers 4 are arranged side by side and laid flat in the shell assembly 100, in some embodiments, in combination with Figure 3 and Figure 4 , the shell assembly 100 includes a top wall 1c and a bottom wall 1d arranged opposite along the thickness direction F3, the mounting cavity 11 includes a top passage 112 between the loudspeaker assembly 200 and the top wall 1c, each sub-cavity 111 is communicated with the rear sound cavity 13 through the top passage 112, and the mounting cavity 11 further includes a bottom passage 113 between the loudspeaker assembly 200 and the bottom wall 1d, each sub-cavity 111 is communicated with the front sound cavity 12 through the bottom passage 113. Thus, the structure is simple, and the simultaneous communication of each sub-cavity 111 with the front sound cavity 12 and the simultaneous communication of each sub-cavity 111 with the rear sound cavity 13 can be simply and effectively ensured, the communication effect is good, and the acoustic effect can be better improved.

[0055] In some embodiments of the present application, as shown in Figure 2 and Figure 5As shown, the shell assembly 100 can include: a support 2, the support 2 including a frame portion 21 and a sound outlet portion 22, the frame portion 21 defining a plurality of first limiting grooves 211, a plurality of loudspeakers 4 being correspondingly and limitingly fitted in the plurality of first limiting grooves 211, and the sound outlet portion 22 defining a front sound cavity 12. Thus, the support 2 can be used to mount and fix the plurality of loudspeakers 4, improving the assembly efficiency, and the first limiting grooves 211 and the front sound cavity 12 are both provided on the same support 2, so that the relative positions of the loudspeakers 4 and the front sound cavity 12 can be ensured to be stable, thereby ensuring and improving the acoustic effect.

[0056] For example, in some specific examples, as Figure 5 As shown, the frame portion 21 can include a frame 213 and a partition rib 212, the partition rib 212 being provided in the frame 213 and defining the plurality of first limiting grooves 211 together with the frame 213, and the partition rib 212 can ensure a certain distance between adjacent two loudspeakers 4, thereby being simple in structure and convenient for processing. Meanwhile, an outer side of one frame edge of the frame 213 is provided with the sound outlet portion 22, the front sound cavity 12 in the sound outlet portion 22 is respectively communicated with each first limiting groove 211 through a communication port on the frame edge, and an opening is provided on an outer surface of the sound outlet portion 22 and opposite to the sound outlet hole 14, so that the front sound cavity 12 can sound through the sound outlet hole 14. The shape of the first limiting groove 211 can be matched with the shape of the corresponding loudspeaker 4, so as to improve the limiting effect, facilitate the design, processing and assembly, and improve the structural compactness.

[0057] Further, as Figure 2 As shown, the shell assembly 100 can further include: an outer shell 3, the support 2 being provided in the outer shell 3, the outer shell 3 defining a rear sound cavity 13 by itself, and the outer shell 3 and the support 2 defining the mounting cavity 11 together. Thus, the mounting cavity 11, the front sound cavity 12 and the rear sound cavity 13 can be simply and effectively obtained, the shell assembly 100 is simple in structure and convenient for processing and assembly, and the loudspeaker assembly 200 is convenient for assembly to the shell assembly 100.

[0058] Further, as Figure 2 As shown, the shell assembly 100 has a sound outlet hole 14 communicated with the front sound cavity 12 and a ventilation hole 15 communicated with the rear sound cavity 13, and the sound outlet hole 14 and the ventilation hole 15 can both be provided on the outer shell 3. Thus, the sound outlet hole 14 and the ventilation hole 15 can be simply and effectively obtained, and the shell assembly 100 is simple in structure and convenient for processing and assembly.

[0059] Optionally, as Figure 2 and Figure 6As shown, the shell 3 can include a base 31 and a cover plate 32, the base 31 defines a mounting space 311 with an open side in thickness direction, the mounting space 311 has a second limiting groove 312 therein, the support 2 is arranged in the mounting space 311 and is positioned and matched with the second limiting groove 312, and the cover plate 32 is arranged on the open side of the base 31 to cooperatively define the rear sound cavity 13 with the base 31. Thus, the shell 3 has simple structure and is convenient for processing, the relative position between the support 2 and the shell 3 can be stably and reliably ensured by using the second limiting groove 312, the acoustic effect is ensured, and the shell 3 with such structure has simple composition, is convenient for processing and assembling itself, and is convenient for assembling with the support 2. The shape of the second limiting groove 312 can be matched with the shape of the support 2, so that the limiting effect can be improved, and the design, processing and assembly are facilitated, and the structural compactness is improved.

[0060] For example, during assembly, a plurality of loudspeakers 4 can be respectively fixed at the plurality of first limiting grooves 211 on the support 2 to obtain a semi-finished assembly, the semi-finished assembly is arranged in the second limiting groove 312 of the base 31 to obtain the front sound cavity 12, and then the cover plate 32 is arranged on the open side of the base 31 to obtain the rear sound cavity 13 cooperatively defined by the base 31 and the cover plate 32.

[0061] In some embodiments, the base 31 has a protruding portion 313 protruding towards the direction away from the cover plate 32, the second limiting groove 312 includes a partial sunken groove 314 arranged corresponding to the protruding portion 313, and the sound outlet portion 22 is matched with the partial sunken groove 314. Thus, the position of the sound outlet portion 22 can be lowered, so that the front sound cavity 12 can be arranged close to the thickness side of the shell assembly 100, and then it is beneficial to realize that the sound hole 14 is arranged close to the thickness side of the shell assembly 100, so that the distance between the sound hole 14 and the human ear can be better shortened.

[0062] Next, a head-mounted device according to an embodiment of the second aspect of the present application is described.

[0063] The head-mounted device according to the embodiment of the present application includes the loudspeaker device 1000 according to the above-mentioned embodiment. Thus, the head-mounted device according to the embodiment of the present application, by arranging the loudspeaker device 1000 according to the embodiment of the present application, since the loudspeaker device 1000 includes a plurality of loudspeakers 4 sharing a sound cavity, the acoustic performance can be improved in the case of limited space, the sound conduction distance is shortened, and then it is beneficial to ensure the sound quality of the head-mounted device, so as to improve the user experience.

[0064] It should be noted that the specific type of the head-mounted device is not limited, for example, it can be a VR / AR / XR device, etc. In some specific examples of the present application, the head-mounted device can include a side strap, and the loudspeaker 1000 is arranged on the side strap, so that the distance from the loudspeaker 1000 to the ear of the person can be further shortened, thereby the sound guide tube can be omitted, the cost can be reduced, the structure can be simplified, and the sound quality can be improved. It can be understood that when the loudspeaker 1000 is arranged at the position close to the ear of the side strap, the sound quality can be better improved.

[0065] In addition, it can be understood that the side strap can include two strap segments located on the left and right sides of the head of the human body, and each strap segment is respectively provided with a loudspeaker 1000, so that both ears on both sides can feel the sound, and the user experience is improved. Of course, the present application is not limited thereto, and in other embodiments of the present application, the loudspeaker 1000 can also be arranged at the top strap or the middle shell of the head-mounted electronic device, which is not described here.

[0066] In addition, after the type of the head-mounted device according to the embodiment of the present application is determined, other constitutions and operations of the head-mounted device are known to those skilled in the art, which will not be described in detail here.

[0067] In the description of the present application, it should be understood that the terms "length", "width", "thickness" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0068] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0069] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the description herein of certain examples does not necessarily exclude these examples from the scope of the application, and these examples can be combined with each other for the purpose of patentable inventions.

[0071] Although the embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A speaker apparatus of a head-mounted device, characterized by, The loudspeaker device comprises: a housing assembly having a mounting cavity, a front sound cavity and a rear sound cavity inside, the mounting cavity comprising a plurality of sub-cavities, each of the sub-cavities being in communication with the front sound cavity and the rear sound cavity; a loudspeaker assembly comprising a plurality of loudspeakers, each of the loudspeakers being arranged in one-to-one correspondence with one of the sub-cavities so that each of the sub-cavities is provided with one of the loudspeakers; the housing assembly comprises a top wall and a bottom wall arranged oppositely along a thickness direction, the mounting cavity comprises a top passage between the loudspeaker assembly and the top wall, each of the sub-cavities is in communication with the rear sound cavity through the top passage, and the mounting cavity further comprises a bottom passage between the loudspeaker assembly and the bottom wall, each of the sub-cavities is in communication with the front sound cavity through the bottom passage.

2. The speaker apparatus of the head-mounted device according to claim 1, wherein the housing assembly has a first end and a second end at two ends of a length direction of the housing assembly, the front sound cavity is located at a side of the mounting cavity close to the first end, and the rear sound cavity is located at a side of the mounting cavity close to the second end, the length of the front sound cavity is less than the length of the rear sound cavity in the length direction of the housing assembly.

3. The speaker apparatus of a head-mounted device according to claim 2, wherein the housing assembly has a sound outlet hole in communication with the front sound cavity, the sound outlet hole being arranged on an end face of the first end.

4. The speaker device of a head-mounted device according to claim 3, wherein, the center of the sound outlet hole is arranged to deviate from the width center and / or the thickness center of the first end, and the sound outlet hole occupies more than 1 / 3 of the length of the first end.

5. The speaker assembly of claim 2, wherein, the plurality of sub-cavities in the mounting cavity are arranged in sequence along a width direction of the housing assembly, so that the plurality of loudspeakers are laid side by side in the housing assembly.

6. The speaker apparatus of a head-mounted device according to claim 1, wherein the housing assembly comprises a support, the support comprising a frame part and a sound outlet part, the frame part defining a plurality of first limiting grooves, and the plurality of loudspeakers being arranged in one-to-one correspondence with the plurality of first limiting grooves, the sound outlet part defining the front sound cavity.

7. The speaker device of a head-mounted device according to claim 6, wherein, the housing assembly further comprises an outer shell, the support being arranged in the outer shell, the outer shell defining the rear sound cavity alone, and the outer shell and the support defining the mounting cavity together.

8. The speaker device of a head-mounted device according to claim 7, wherein, the housing assembly has a sound outlet hole in communication with the front sound cavity and a ventilation hole in communication with the rear sound cavity, the sound outlet hole and the ventilation hole being arranged on the outer shell.

9. The speaker device of a head-mounted device according to claim 7, wherein, the outer shell comprises a base and a cover plate, the base defining a mounting space open on one side along a thickness direction, the mounting space having a second limiting groove inside, the support being arranged in the mounting space and positioned and fitted in the second limiting groove, and the cover plate being arranged on the open side of the base to define the rear sound cavity together with the base.

10. The speaker device of a head-mounted device according to claim 9, wherein, the base has a protruding part protruding towards a direction away from the cover plate, the second limiting groove comprises a local sunken groove corresponding to the protruding part, and the sound outlet part is fitted in the local sunken groove.

11. The speaker device of a head-mounted device according to any one of claims 1-10, wherein, the loudspeaker device comprises two loudspeakers, and the two loudspeakers are the same or different.

12. A head-mounted device, characterized by The loudspeaker device comprises the head-mounted device according to any one of claims 1-11.

13. The headgear of claim 12, wherein, The head-mounted device comprises a side strap, and the loudspeaker device is arranged in the side strap.

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