Electronic device

Abstract

The invention discloses electronic equipment. The electronic equipment comprises a circuit board, a reinforcing part and a first sound cavity shell, the circuit board is provided with a first avoiding hole penetrating in the thickness direction of the circuit board; the reinforcing piece comprises a sunken part and an annular lap joint edge surrounding the sunken part, the annular lap joint edge is located on the first side of the circuit board and is in lap joint with the circuit board, the sunken part is formed by sinking relative to the annular lap joint edge, the sunken part penetrates through the first receding hole and extends to the second side of the circuit board, and the annular lap joint edge is in lap joint with the annular lap joint edge. The first side and the second side are two opposite sides of the circuit board; the first sound cavity shell is supported on the annular lap joint edge and is in sealed butt joint with the annular lap joint edge, and at least the first sound cavity shell and the reinforcing piece define a sound cavity. According to the scheme, the problem that the sound production device is difficult to form a sound cavity with a large volume to improve the sound production performance due to the fact that a reinforcing part is arranged on a circuit board of the electronic equipment related to the related technology and occupies the space of the board surface can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment design, and specifically relates to an electronic equipment. Background Art

[0002] As user demands increase, the performance of electronic devices continues to be optimized. In order to ensure that electronic devices (especially portable electronic devices) have good battery life, the capacity of batteries configured in electronic devices is getting larger and larger. The increasing battery capacity causes the battery to be larger and larger, which in turn causes the battery to occupy more and more space on the circuit board (such as the motherboard) inside the electronic device.

[0003] In the related art, the electronic device is equipped with a sound-generating device, and the sound-generating device is arranged on a circuit board. In order to improve the sound-generating performance of the sound-generating device, the sound-generating device needs to form a sound cavity as large as possible, which requires the circuit board to leave as much space as possible for the sound-generating device. In order to at least avoid the battery and make full use of the internal space of the electronic device, the circuit board will form some narrow side areas. At the same time, in order to make full use of the narrow side areas to form a sound cavity as large as possible, the sound-generating device will be arranged in the narrow side areas or adjacent to the narrow side areas.

[0004] However, the strength of the narrow side area is relatively low. In order to prevent the narrow side area from deforming and affecting the sealing of the sound cavity formed by the narrow side area and the sound device, the relevant technology will arrange a reinforcing piece in the narrow side area. Although the reinforcing piece can play a reinforcing role and make the narrow side area less likely to deform, thereby ensuring the sealing of the sound cavity surrounded by the narrow side area and the sound device, the reinforcing piece will also occupy the board space of the narrow side area, which makes it impossible for the narrow side area, which is not spacious to provide a larger board space for the sound device, and makes it difficult to achieve the purpose of making full use of the narrow side area to form a larger sound cavity as possible.

[0005] It should be emphasized that, not limited to the narrow edge area, setting reinforcement parts in other types of areas where the circuit board needs to be strengthened will also occupy the board space, which will in turn affect the sound device to form a larger sound cavity, and ultimately make it particularly difficult to improve the sound performance of electronic equipment. Summary of the invention

[0006] The present invention discloses an electronic device to solve the problem that a reinforcing piece is arranged on a circuit board of an electronic device involved in the related art, which occupies the board surface space and causes a sound device to be difficult to form a larger sound cavity to improve the sound performance.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: An embodiment of the present invention discloses an electronic device, which includes a circuit board, a reinforcement member, and a first sound cavity housing; wherein: The circuit board is provided with a first avoidance hole penetrating in the thickness direction of the circuit board; The reinforcing piece includes a recessed portion and an annular lap edge surrounding the recessed portion, the annular lap edge is located on a first side of the circuit board and overlaps the circuit board, the recessed portion is recessed relative to the annular lap edge, the recessed portion passes through the first avoidance hole and extends to the second side of the circuit board, the first side and the second side are two opposite sides of the circuit board; The first sound cavity shell is supported on the annular overlapping edge and sealedly connected to the annular overlapping edge. At least the first sound cavity shell and the reinforcing member form a sound cavity.

[0008] The technical solution adopted by the present invention can achieve the following technical effects: The electronic device disclosed in the embodiment of the present invention is designed to have a reinforcing member structure such that the reinforcing member includes an annular lap edge and a recessed portion of an integral structure therewith, the annular lap edge overlaps the edge of the first avoidance hole of the circuit board, and is supported and matched with the first sound cavity shell and sealedly docked. This structure enables the annular lap edge to overlap with the first sound cavity shell, so that the annular lap edge and the first sound cavity shell share the relative layout area on the circuit board, and ultimately achieves the reinforcement of the circuit board, while also avoiding the annular lap edge from occupying the board surface of the circuit board, thereby enabling the volume of the first sound cavity shell to be designed to be larger, thereby facilitating the formation of a larger sound cavity to achieve a better sounding effect. At the same time, the overall structural strength formed by the recessed portion and the annular lap edge is greater, which can play a better reinforcing role on the circuit board, and the recessed portion can also pass through the first avoidance hole to extend to the second side of the circuit board, thereby further expanding the space of the second side of the circuit board to further expand the space of the sound cavity, thereby further facilitating the formation of a larger sound cavity, and ultimately better improving the sounding performance of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of a partial structure of an electronic device disclosed in an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the decomposition of the middle part structure; Figure 3 is a schematic diagram of a partial structure of another electronic device disclosed in an embodiment of the present invention; Figure 4 is a schematic diagram of a partial structure of another electronic device disclosed in an embodiment of the present invention; Figure 5 yes Figure 4 Schematic diagram of the partial structure of the .

[0010] Description of reference numerals: 10-circuit board, 11-first avoidance hole, 20-reinforcement piece, 21-recessed portion, 211-opening, 22-annular overlapping edge, 221-second avoidance hole, 222-avoidance space, 30- first sound cavity shell, 40- sound-emitting body, 51-first sealing ring, 52-second sealing ring, 53-welding layer, 60-second sound cavity housing, 70-chip, 80-functional device, 01-sound cavity, 011-sound front cavity, 012-sound back cavity, 013-sound outlet hole. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0013] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] Please refer to Figures 1 to 5 The embodiment of the present invention discloses an electronic device, which includes a circuit board 10 , a reinforcement member 20 and a first sound cavity housing 30 .

[0015] The circuit board 10 can be a main board of an electronic device, or a sub-board of an electronic device. The embodiment of the present invention does not limit the specific type of the circuit board 10. The circuit board 10 is at least used to provide an installation position for the reinforcement 20 and the first sound cavity housing 30. The circuit board 10 is provided with a first avoidance hole 11 that penetrates the thickness direction of the circuit board 10, that is, the first avoidance hole 11 penetrates the circuit board 10 in the thickness direction of the circuit board 10. The first avoidance hole 11 plays the function of avoiding the recessed portion 21 mentioned later. The first avoidance hole 11 can be a square hole, a round hole, etc. The embodiment of the present invention does not limit the specific shape of the first avoidance hole 11. The area on the circuit board 10 adjacent to the first avoidance hole 11 can be considered as a narrow edge area.

[0016] The reinforcing member 20 is at least used to perform a reinforcing function. Specifically, the reinforcing member 20 is connected to the circuit board 10, so as to strengthen the narrow side area of ​​the circuit board 10 that surrounds the first avoidance hole 11, thereby improving the strength of the circuit board 10, so that the circuit board 10 is not easily deformed. The reinforcing member 20 is an integrated structure. The reinforcing member 20 can be a metal member such as an iron member, a copper member, or a non-metallic member with higher strength. The embodiment of the present invention does not limit the specific material of the reinforcing member 20. In order to reduce the stacking height, the reinforcing member 20 can be a metal sheet.

[0017] In an embodiment of the present invention, the reinforcing piece 20 includes a recessed portion 21 and an annular lap edge 22. The annular lap edge 22 is arranged around the recessed portion 21. The recessed portion 21 is recessed relative to the annular lap edge 22. The recessed portion 21 and the annular lap edge 22 are an integrated structure. For example, the recessed portion 21 and the annular lap edge 22 can be made of the same sheet material by bending, stamping and stretching. The annular lap edge 22 is located on the first side of the circuit board 10 and overlaps the circuit board 10. Specifically, the annular lap edge 22 overlaps the edge of the first avoidance hole 11, so that the annular lap edge 22 will not pass through the first avoidance hole 11 and fall off on the second side of the circuit board 10. In one embodiment, the reinforcing piece 20 can be a metal sheet, and the metal sheet is formed into the annular lap edge 22 and the recessed portion 21 by bending or stamping and stretching.

[0018] In order to improve the stability of the connection, the annular lap edge 22 can be fixedly connected to the circuit board 10 by bonding, welding, etc. In one embodiment, the annular lap edge 22 can be fixedly connected to the circuit board 10 by a welding layer 53 formed by welding. In other embodiments, without affecting the sealed connection between the annular lap edge 22 and the first sound cavity housing 30 described below, the annular lap edge 22 can also be fixedly connected to the circuit board 10 through a connector (such as a threaded connector). The embodiment of the present invention does not limit the specific connection method between the annular lap edge 22 and the circuit board 10.

[0019] The recessed portion 21 passes through the first avoidance hole 11 and extends to the second side of the circuit board 10. It should be noted that the first side and the second side are two opposite sides of the circuit board 10, that is, the first side is the side that one surface of the circuit board 10 faces, and the second side is the side that the other surface of the circuit board 10 faces.

[0020] The first sound cavity shell 30 is a shell member used to constitute the sound cavity 01 of the sound-emitting device of the electronic device. The first sound cavity shell 30 is supported on the annular lap edge 22, and the first sound cavity shell 30 is sealed and docked with the annular lap edge 22. Specifically, the docking opening of the first sound cavity shell 30 is sealed and docked with the annular lap edge 22, thereby achieving a sealed docking with the reinforcement 20. At least the first sound cavity shell 30 and the reinforcement 20 enclose the sound cavity 01 of the sound-emitting device, that is, the first sound cavity shell 30 and the reinforcement 20 can enclose at least a part of the sound cavity 01 of the sound-emitting device. In this case, the reinforcement 20 not only plays a reinforcing function, but also plays a function of cooperating with the first sound cavity shell 30 to enclose the sound cavity 01. It can be seen that the reinforcement 20 disclosed in the embodiment of the present invention can achieve the purpose of one object with multiple uses.

[0021] It should be explained that the first sound cavity housing 30 is supported on the annular lap edge 22, which essentially realizes the superposition of the first sound cavity housing 30 and the annular lap edge 22 on the circuit board 10. For example, the first sound cavity housing 30 and the annular lap edge 22 are superimposed in a direction perpendicular to the board surface of the circuit board 10, so that the area opposite to them on the circuit board 10 can be shared, avoiding the phenomenon that they each independently occupy a part of the board surface space and occupy too much board surface space of the circuit board 10.

[0022] The electronic device disclosed in the embodiment of the present invention designs the structure of the reinforcing piece 20 so that the reinforcing piece 20 includes an annular lap edge 22 and a recessed portion 21 integrally formed therewith, and the annular lap edge 22 overlaps the edge of the first avoidance hole 11 of the circuit board 10, and is supported, matched and sealed with the first sound cavity housing 30. This structure enables the annular lap edge 22 to overlap with the first sound cavity housing 30, so that the annular lap edge 22 and the first sound cavity housing 30 share the relative layout area on the circuit board 10, and ultimately achieves the reinforcement of the circuit board 10 while preventing the annular lap edge 22 from occupying the board surface of the circuit board 10, thereby enabling the volume of the first sound cavity housing 30 to be designed to be larger, which is conducive to forming a larger sound cavity 01 to achieve a better sound effect. At the same time, the overall structural strength formed by the recessed portion 21 and the annular overlapping edge 22 is greater, which can better strengthen the circuit board 10, and the recessed portion 21 can also pass through the first avoidance hole 11 to extend to the second side of the circuit board 10, thereby further expanding the space on the second side of the circuit board 10 to further expand the space of the sound cavity 01, thereby further facilitating the formation of a larger sound cavity 01, and ultimately better improving the sound performance of the electronic device.

[0023] As described above, the annular lap edge 22 is sealed and docked with the first sound cavity housing 30. There are many ways to achieve the sealed docking. In one embodiment, the electronic device disclosed in the embodiment of the present invention may also include a first sealing ring 51. The annular lap edge 22 and the first sound cavity housing 30 may be sealed and docked through the first sealing ring 51. The first sealing ring 51 may be pressed between the first sound cavity housing 30 and the annular lap edge 22. The first sealing ring 51 may also be a foam ring or a rubber ring. The embodiment of the present invention does not limit the specific material of the first sealing ring 51. In another embodiment, the annular lap edge 22 and the first sound cavity housing 30 may be sealed and docked through a sealing layer. In a more specific embodiment, the first sealing ring 51 may be a foam ring, and the opposite sides of the foam ring are respectively bonded and connected to the first sound cavity housing 30 and the annular lap edge 22. At the same time, the foam ring is clamped by the first sound cavity housing 30 and the annular lap edge 22. It should be noted that the embodiment of the present invention does not limit the specific sealing docking method between the annular lap edge 22 and the first sound cavity housing 30.

[0024] As described above, at least the first sound cavity shell 30 and the reinforcing member 20 enclose the sound cavity 01. In one embodiment, the first sound cavity shell 30 and the reinforcing member 20 enclose the sound cavity 01, that is, only the first sound cavity shell 30 and the reinforcing member 20 need to be sealed and connected to form the sound cavity 01. This structure can make the sound device of the electronic device have fewer components and a simpler structure. It should be noted that the electronic device disclosed in the embodiment of the present invention may include a sound-emitting device, and the sound-emitting device may include the reinforcement 20 and the first sound cavity shell 30 mentioned above. The electronic device disclosed in the embodiment of the present invention may also include a sound-emitting body 40, that is, the sound-emitting device may also include a sound-emitting body 40. The sound-emitting body 40 is arranged in the sound cavity 01, and the sound-emitting body 40 divides the sound cavity 01 into a sound front cavity 011 and a sound rear cavity 012 that are sealed and isolated from each other. Specifically, the sound-emitting body 40 may be fixedly connected to the annular lap edge 22, or may be fixedly connected to the recessed portion 21, or may be fixedly connected to the first sound cavity shell 30, or may be fixedly connected to the second sound cavity shell 60 mentioned in other embodiments later, so as to achieve fixed installation in the sound cavity 01. The embodiment of the present invention does not limit the specific connection object of the sound-emitting body 40 when it is installed in the sound cavity 01.

[0025] Specifically, the first sound cavity housing 30, the recessed portion 21 or the second sound cavity housing 60 mentioned later may be provided with a sound outlet hole 013, which is connected to the sound front cavity 011, so that the sound emitted by the sound body 40 can be transmitted from the sound outlet hole 013. The sound rear cavity 012 is a closed inner cavity, so as to ensure the low-frequency performance of the sound-emitting device.

[0026] In other embodiments, the electronic device disclosed in the embodiment of the present invention may further include a second sound cavity housing 60, the recessed portion 21 may be provided with an opening 211, and the second sound cavity housing 60 is sealed and docked with the opening 211. The first sound cavity housing 30 is sealed and docked with the reinforcement 20, and the opening 211 is sealed and docked with the second sound cavity housing 60 to jointly enclose the sound cavity 01. In this case, the first sound cavity housing 30, the reinforcement 20, and the second sound cavity housing 60 are sealed and docked in sequence to form the sound cavity 01. In this structure, since the recessed portion 21 is a structure with an opening 211, the designer can more flexibly achieve the purpose of expanding the cavity by docking with the second sound cavity housing 60, which is ultimately beneficial to improving the sound effect.

[0027] During the specific assembly process, the annular overlapping edge 22 overlaps the edge of the first avoidance hole 11, and the recessed portion 21 passes through the first avoidance hole 11 and extends to the second side of the circuit board 10, which determines that the size of the recessed portion 21 is limited by the size of the first avoidance hole 11, which results in the limited effect of the recessed portion 21 on increasing the volume of the sound cavity 01. In the above embodiment, the recessed portion 21 has an opening 211, so that the manufacturer can connect the second sound cavity shell 60 to the second lateral opening 211 of the circuit board 10. Since the second sound cavity shell 60 does not need to pass through the first avoidance hole 11, it is not easily limited by the size of the first avoidance hole 11, so that the second sound cavity shell 60 can be designed to be larger in size to achieve the purpose of expanding the cavity to a greater extent.

[0028] Based on this, in one embodiment, a partial area of ​​the positive projection of the second sound cavity shell 60 on the circuit board 10 can be located outside the first avoidance hole 11. This structure indicates that the size of the second sound cavity shell 60 is larger, breaking through the size range of the first avoidance hole 11, thereby forming a larger volume of the sound cavity 01.

[0029] As described above, the opening 211 is sealed and docked with the second sound cavity housing 60. There are many ways to achieve the sealed docking. In one embodiment, the electronic device disclosed in the embodiment of the present invention may also include a second sealing ring 52. The edge of the opening 211 and the second sound cavity housing 60 may be sealed and docked through the second sealing ring 52. The second sealing ring 52 may be pressed between the second sound cavity housing 60 and the edge of the opening 211. The second sealing ring 52 may be a foam ring, a rubber ring, etc. The embodiment of the present invention does not limit the specific material of the second sealing ring 52. In another embodiment, the edge of the opening 211 may be sealed and docked with the second sound cavity housing 60 through a sealing layer. The embodiment of the present invention does not limit the specific sealing docking method of the opening 211 and the second sound cavity housing 60.

[0030] As described above, the electronic device may further include a sound-emitting body 40, which is fixed in the sound cavity 01, and the sound-emitting body 40 divides the sound cavity 01 into a sound front cavity 011 and a sound rear cavity 012 that are sealed and isolated from each other. In order to improve the low-frequency performance of the sound-emitting device, the volume of the sound front cavity 011 may be smaller than the volume of the sound rear cavity 012. This structure enables the volume of the sound rear cavity 012 to be larger when the volume of the sound cavity 01 is constant, so that the sound-emitting device can better take into account the low-frequency performance.

[0031] As also described above, the embodiment of the present invention does not limit the specific connection object of the sound body 40 when it is installed in the sound cavity 01. In one embodiment, the sound body 40 can be connected to the first sound cavity shell 30. The sound body 40 and the first sound cavity shell 30 enclose a sound front cavity 011. The first sound cavity shell 30 is provided with a sound outlet 013, and the sound outlet 013 is connected to the sound front cavity 011. In addition, since the second sound cavity shell 60 is docked on the second side of the circuit board 10 and is actually docked with the opening 211 of the recessed portion 21, the sound body 40 is connected to the first sound cavity shell 30 to form the sound front cavity 011, which makes it easier for the recessed portion 21 and the second sound cavity shell 60 docked therewith to form a larger sound rear cavity 012, thereby making it easier to improve the sound performance of the sound-generating device.

[0032] In the embodiment of the present invention, the annular overlapping edge 22 may be a circular ring structure, a square ring structure, or a triangular ring structure. The embodiment of the present invention does not limit the more specific structure of the annular overlapping edge 22.

[0033] In an embodiment of the present invention, the annular overlapping edge 22 may be located in the same plane or may not be located in the same plane. Based on this, in one embodiment, the annular overlapping edge 22 may be a bending structure, and the bending structure forms an avoidance space 222 by bending. The electronic device may also include a functional device 80, and the functional device 80 is of a different type from the sound-emitting device. For example, if the sound-emitting device is used as the first functional device, then the functional device 80 may be considered as the second functional device. The functional device 80 is arranged adjacent to the annular overlapping edge 22. At least part of the functional device 80 may be located in the avoidance space 222, so that the avoidance space 222 can be fully utilized for layout, which is conducive to improving the space utilization rate in the electronic device and making the structure of the electronic device more compact.

[0034] In the embodiment of the present invention, the first avoidance hole 11 may be a hole with closed edges formed by connecting the peripheral edges end to end, such as Figure 2 As shown, it can also be a hole with missing edges, such as Figure 5 In the embodiment where the first avoidance hole 11 is a hole without edges, which can also be considered as a structure with a notch, the annular overlap edge 22 does not need to strengthen the part without edges, and is more easily designed into a bent structure, thereby making it easier to form an avoidance space 222.

[0035] The functional device 80 mentioned above may be a camera, a fill light, a microphone or other devices, and the embodiment of the present invention does not limit the specific type of the functional device 80 .

[0036] The electronic device disclosed in the embodiment of the present invention may further include a chip 70, which is disposed on the circuit board 10. The chip 70 is used to be electrically connected to the sound-emitting body 40, for example, the chip 70 is electrically connected to the sound-emitting body 40 through a cable to power and / or control the sound-emitting body 40. The annular lap edge 22 is provided with a second avoidance hole 221, and the chip 70 can be disposed on the circuit board 10 and located in the second avoidance hole 221. The annular lap edge 22 is sealed and docked with the first sound cavity shell 30 around the outer edge of the second avoidance hole 221, thereby ensuring that the seal between the annular lap edge 22 and the first sound cavity shell 30 is not destroyed, and at the same time ensuring that the chip 70 is located in the sound cavity 01 and is more easily electrically connected to the sound-emitting body 40.

[0037] The electronic device disclosed in the embodiment of the present invention may be a mobile phone, a tablet computer, an e-book reader, a game console, a wearable device (such as smart glasses, a smart bracelet, etc.), or other types of electronic devices. The embodiment of the present invention does not limit the specific type of the electronic device.

[0038] The above embodiments of the present invention focus on the differences between the various embodiments. As long as the different features of the various embodiments are not contradictory, they can be combined to form more specific embodiments. Considering the simplicity of the text, they will not be repeated here.

[0039] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An electronic device, characterized in that: It comprises a circuit board (10), a reinforcing piece (20) and a first sound cavity housing (30); wherein: The circuit board (10) is provided with a first avoidance hole (11) penetrating in the thickness direction of the circuit board (10); The reinforcing piece (20) comprises a recessed portion (21) and an annular overlapping edge (22) surrounding the recessed portion (21), the annular overlapping edge (22) being located on a first side of the circuit board (10) and overlapping the circuit board (10), the recessed portion (21) being recessed relative to the annular overlapping edge (22), the recessed portion (21) passing through the first avoidance hole (11) and extending to a second side of the circuit board (10), the first side and the second side being two opposite sides of the circuit board (10); The first sound cavity shell (30) is supported on the annular overlapping edge (22) and is sealedly connected to the annular overlapping edge (22), and at least the first sound cavity shell (30) and the reinforcing member (20) enclose a sound cavity (01).

2. The electronic device according to claim 1, characterized in that: The electronic device further comprises a first sealing ring (51), and the annular overlapping edge (22) and the first sound cavity housing (30) are sealed and butted together via the first sealing ring (51).

3. The electronic device according to claim 1, characterized in that: The first sound cavity housing (30) and the reinforcing piece (20) are sealed and butted against each other to enclose the sound cavity (01).

4. The electronic device according to claim 1, characterized in that: The recessed portion (21) is provided with an opening (211), and the electronic device further comprises a second sound cavity housing (60), the second sound cavity housing (60) and the opening (211) are sealedly connected to each other, the first sound cavity housing (30) and the reinforcing piece (20) are sealedly connected to each other, and the opening (211) and the second sound cavity housing (60) are sealedly connected to each other, so as to jointly enclose the sound cavity (01).

5. The electronic device according to claim 4, characterized in that: A partial area of ​​the orthographic projection of the second sound cavity housing (60) on the circuit board (10) is located outside the first avoidance hole (11).

6. The electronic device according to claim 1, characterized in that: The electronic device further comprises a sound-emitting body (40), wherein the sound-emitting body (40) is fixed in the sound cavity (01), and the sound-emitting body (40) divides the sound cavity (01) into a sound front cavity (011) and a sound rear cavity (012) which are sealed and isolated from each other, and the volume of the sound front cavity (011) is smaller than the volume of the sound rear cavity (012).

7. The electronic device according to claim 6, characterized in that: The sound-emitting body (40) is connected to the first sound cavity shell (30); the sound-emitting body (40) and the first sound cavity shell (30) enclose the sound front cavity (011); the first sound cavity shell (30) is provided with a sound outlet hole (013); the sound outlet hole (013) is connected to the sound front cavity (011).

8. The electronic device according to claim 6, characterized in that: The annular overlapping edge (22) is provided with a second avoidance hole (221); the electronic device further comprises a chip (70); the chip (70) is arranged on the circuit board (10) and is located in the second avoidance hole (221); the annular overlapping edge (22) surrounds the outer edge of the second avoidance hole (221) and is sealed and butted with the first sound cavity housing (30).

9. The electronic device according to claim 1, characterized in that: The annular overlapping edge (22) is a bent structure, and an escape space (222) is formed by bending. The electronic device also includes a functional device (80) adjacent to the annular overlapping edge (22), and at least a portion of the functional device (80) is located in the escape space (222).

10. The electronic device according to claim 1, characterized in that: The annular overlapping edge (22) is fixedly connected to the circuit board (10) by welding, bonding or connecting with a connector.

11. The electronic device according to claim 1, characterized in that: The reinforcing piece (20) is a metal sheet, and the metal sheet is formed into the annular overlapping edge (22) and the recessed portion (21) by means of bending or stamping and stretching.

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