Electronic device

Abstract

The application discloses an electronic device, and relates to the technical field of electro-acoustic conversion. The electronic device comprises a frame, a first cover, a second cover and a sound production unit. The frame is provided with a balance channel. The first cover and the second cover are arranged on opposite sides of the frame. The frame, the first cover and the second cover jointly form a containing space. The sound production unit is contained in the containing space. A front cavity is formed between a diaphragm of the sound production unit and the first cover. A rear cavity is formed between the second cover and the sound production unit. The balance channel is connected with the rear cavity and a sound channel. The sound channel is connected with an external space. The sound channel is arranged on the frame or the first cover, or is formed between the frame and the first cover. An acoustic resistance element covers the balance channel. The acoustic resistance of the acoustic resistance element is greater than or equal to 2000 MKSRayls.

Description

Technical Field

[0001] This application belongs to the field of electroacoustic conversion technology, specifically relating to an electronic device. Background Technology

[0002] In related technologies, a leakage hole is provided on the housing of the sound-generating unit, which connects the rear cavity of the sound-generating unit to the external space to balance the air pressure in the rear cavity. When the sound-generating unit is used in electronic devices, the leakage hole, which directly connects to the external space, is easily blocked by debris, causing the leakage hole to fail and resulting in poor sound quality of the electronic device. Summary of the Invention

[0003] This application aims to provide an electronic device that at least solves the technical problem that the leakage hole in the sound-generating unit is easily blocked by debris, resulting in poor sound quality of the sound-generating unit.

[0004] In a first aspect, embodiments of this application provide an electronic device, comprising: The enclosure features a balanced channel and a sound channel that connects to the external space; The first cover and the second cover are installed on opposite sides of the frame; A sound-generating unit is set in the frame. A front cavity is formed between the diaphragm of the sound-generating unit and the first cover. A rear cavity is formed between the second cover and the sound-generating unit. A balance channel connects the rear cavity and the sound channel. The sound channel is connected to the external space. The sound channel is set on the frame or the first cover, or a sound channel is formed between the frame and the first cover. An acoustic resistor covering the balanced channel, wherein the acoustic impedance of the acoustic resistor is greater than or equal to 2000 MKS Rayls.

[0005] In the embodiments of this application, by providing a balanced channel connecting the rear cavity and the sound channel on the frame, the rear cavity can be connected to the external space through this balanced channel and the sound channel, maintaining the air pressure balance within the rear cavity. This eliminates the need for a leakage hole on the frame that directly connects the rear cavity and the external space, thereby avoiding poor sound quality of the speaker unit caused by the leakage hole being blocked by debris, and improving the sound effect of the electronic device. At the same time, a sound-absorbing component is covered on the balanced channel. The sound-absorbing component is a structural component with high sound resistance and holes, which can ensure normal airflow while preventing sound leakage. Thus, the sound effect of the electronic device can be further improved.

[0006] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0007] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is a schematic diagram of the structure of an embodiment of the electronic device according to this application; Figure 2 This is one of the disassembly diagrams of an embodiment of the electronic device according to this application; Figure 3 This is one of the cross-sectional structural schematic diagrams of an embodiment of the electronic device according to this application; Figure 4 It is a frequency response curve of the electronic device according to this application; Figure 5 This is a second disassembly diagram of an embodiment of the electronic device according to this application; Figure 6 This is a second cross-sectional structural schematic diagram of an embodiment of the electronic device according to this application; Figure 7 This is a third disassembly diagram of an embodiment of the electronic device according to this application; Figure 8 This is a third cross-sectional structural schematic diagram of an embodiment of the electronic device according to this application; Figure 9 yes Figure 8 An enlarged structural diagram of part B shown; Figure 10 yes Figure 7 A magnified structural diagram of part A shown; Figure 11 This is the fourth cross-sectional structural schematic diagram of an embodiment of the electronic device according to this application. Detailed Implementation

[0008] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0009] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0010] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0011] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0012] The following is combined with Figures 1 to 11 This application describes an electronic device according to an embodiment of the present application.

[0013] like Figure 1 , Figure 2 and Figure 3 As shown, an electronic device includes: a frame 1, a first cover 2, a second cover 3, and a sound-emitting unit 4. The frame 1 has a balance channel 11; the first cover 2 and the second cover 3 are disposed on opposite sides of the frame 1; the sound-emitting unit 4 is disposed on the frame 1, a front cavity 51 is formed between the diaphragm 41 of the sound-emitting unit 4 and the first cover 2, a rear cavity 52 is formed between the second cover 3 and the sound-emitting unit 4, the balance channel 11 connects the rear cavity 52 and the sound channel 12, the sound channel 12 is connected to the external space, and the sound channel 12 is disposed on the frame 1 or the first cover 2, or the sound channel 12 is formed between the frame 1 and the first cover 2.

[0014] The sound-generating unit 4 is an electroacoustic conversion component in electronic equipment, that is, the sound-generating unit 4 is a transducer that can convert electrical signals into sound signals. The sound-generating unit 4 provided in this application can be a moving-coil sound-generating unit 4, a capacitive sound-generating unit 4, an electromagnetic sound-generating unit 4, or a piezoelectric sound-generating unit 4, etc., and those skilled in the art can select according to their needs. Optionally, the sound-generating unit 4 is a moving-coil sound-generating unit 4, which includes a magnetic circuit system with a magnetic gap, a voice coil inserted into the magnetic gap, and a diaphragm 41 fixed on the voice coil. Under the action of the magnetic field generated by the magnetic circuit system, the voice coil vibrates after being energized, thereby driving the diaphragm 41 to vibrate and generate sound.

[0015] The frame 1, the first cover 2, and the second cover 3 together form a receiving space. The sound-generating unit 4 is housed within this space, which is divided into a front cavity 51 and a rear cavity 52. ​​The front cavity 51 is the space from the side of the diaphragm 41 away from the voice coil to the first cover 2, and the rear cavity 52 is the space from the side of the diaphragm 41 closer to the voice coil to the second cover 3. To ensure that the sound generated by the sound-generating unit 4 can be smoothly transmitted to the external space, one or more sound outlets 122 are provided on the frame 1, which are directly or indirectly connected to the front cavity 51. When the user uses the electronic device, at least one sound outlet 122 connects the external space and the front cavity 51, so that the sound generated by the sound-generating unit 4 can be propagated outward through the front cavity 51 and the sound outlet 122.

[0016] The sound-generating unit 4 can be a semi-enclosed electronic device or an open electronic device. Different types of sound-generating units 4 are arranged differently in electronic devices.

[0017] For example, the electronic device is a semi-enclosed electronic device. The housing material in the electronic device is reused to form the acoustic cavity of the sound-generating unit 4. The housing material can be the frame 1, mounting bracket, battery cover, circuit board 7, etc., of the electronic device. The sound-generating unit 4 is fixed in the electronic device, and the reused housing material is fixed to the sound-generating unit 4, enclosing the sound-generating unit 4 and forming a closed front cavity 51 and a rear cavity 52. ​​The reused housing material has a sound outlet 122 communicating with the front cavity 51, and the sound emitted by the sound-generating unit 4 is played through the sound outlet 122.

[0018] For example, the electronic device is an open-type electronic device. The housing material in the electronic device is reused to form the acoustic cavity of the sound-generating unit 4. The housing material can be the frame 1, mounting bracket, battery cover, circuit board 7, etc., of the electronic device. The sound-generating unit 4 is fixed in the electronic device, and the reused housing material is fixed to the sound-generating unit 4. The reused housing material encloses the sound-generating unit 4, forming a closed front cavity 51 and an irregularly shaped open rear cavity 52. ​​The open rear cavity 52 can be the space between one or more housing materials and the sound-generating unit 4. The reused housing material has a sound outlet 122 communicating with the front cavity 51, and the sound emitted by the sound-generating unit 4 is played through the sound outlet 122.

[0019] The first cover 2 and the second cover 3 can reuse any one or more of the display module, battery panel, circuit board 7, etc. The first cover 2 and the second cover 3 are respectively disposed on both sides of the sound-emitting unit 4 to form the front cavity 51 and the rear cavity 52, respectively. Optionally, the first cover 2 and the second cover 3 are disposed on both sides of the sound-emitting unit 4 along the vibration direction of the diaphragm 41. The vibration direction of the diaphragm 41 is consistent with the thickness direction of the electronic device.

[0020] Those skilled in the art will understand that during the reciprocating vibration of the diaphragm 41 to generate sound, the diaphragm 41 will compress the front cavity 51 to reduce its volume, or compress the rear cavity 52 to reduce its volume, thereby generating airflow moving in the front cavity 51 and airflow moving in the rear cavity 52. ​​A balance channel 11 is provided on the frame 1 to connect the sound channel 12 and the rear cavity 52, so that the air pressure in the rear cavity 52 can be connected with that in the sound channel 12.

[0021] The sound channel 12 can be a channel with a sound outlet 122. The front cavity 51 is connected to this channel with the sound outlet 122, and the sound emitted by the speaker unit 4 can be played outward through this channel. The rear cavity 52 can maintain air pressure balance with the external space through this channel with the sound outlet 122. The sound channel 12 can also be a channel with a microphone. The microphone is connected to this channel with the microphone, and the microphone can receive sound waves through this microphone. The rear cavity 52 can maintain air pressure balance with the external space through this channel with the microphone. The sound channel 12 is disposed on the frame 1 or the first cover 2, or the sound channel 12 is formed between the frame 1 and the first cover 2. For example, the display module is reused as the first cover 2, and the sound channel 12 is disposed on the first cover 2. When the user uses the electronic device to answer a phone call, the user's ear is in contact with the display module, and the sound channel 12 can emit sound towards the user's ear. For example, the frame 1 includes a long axis sidewall and a short axis sidewall opposite to each other, and the sound channel 12 is disposed on the short axis sidewall of the frame 1. When the user holds the electronic device, the user holds it on the long axis sidewall, and the sound-emitting unit 4 can emit sound through the sound channel 12 disposed on the short axis sidewall. For example, there is an assembly gap between the frame 1 and the first cover 2. This assembly gap is the sound channel 12, and the sound-emitting unit 4 can emit sound through the assembly gap.

[0022] In the electronic device provided in this application, by setting a balanced channel 11 on the frame 1 to connect the rear cavity 52 and the sound channel 12, the rear cavity 52 can be connected to the external space through the balanced channel 11 and the sound channel 12, maintaining the air pressure balance in the rear cavity 52. ​​This eliminates the need to set a leakage hole on the frame 1 to directly connect the rear cavity 52 and the external space, thereby avoiding the poor sound effect of the sound unit 4 caused by the leakage hole being blocked by debris, and improving the sound effect of the electronic device.

[0023] Since the sound waves in the channel 12 need to propagate outward or inward, and the balanced channel 11 connects the channel 12 and the rear cavity 52, the sound waves in the channel 12 can also enter the rear cavity 52 through the balanced channel 11, and the sound waves located in the rear cavity 52 can also enter the channel 12 through the balanced channel 11. This may not only affect the output volume and the reception quality, but may also cause an acoustic short circuit.

[0024] The electronic device also includes an acoustic resistor 6, which covers the balanced channel 11. The acoustic impedance of the acoustic resistor 6 is greater than or equal to 2000 MKS Rayls. The acoustic resistor 6 has holes to ensure normal airflow while preventing sound leakage. That is, the acoustic resistor 6 can ensure the air pressure balance between the front and rear cavities, and at the same time prevent sound from leaking from the front cavity to the rear cavity, thus achieving air pressure balance between the front and rear cavities while ensuring sound quality.

[0025] The acoustic impedance is greater than or equal to 2000 MKS Rayls, which allows the acoustic resistor 6 to, to some extent, prevent or reduce the transmission of sound waves through the balance channel 11 between the front cavity 51 and the rear cavity 52. ​​Furthermore, airflow can pass through the acoustic resistor 6, thereby balancing the air pressure in the rear cavity 52 with the external space. Please refer to [reference needed]. Figure 4 The figures show the frequency response curves of the electronic devices in Experimental Example 1, Comparative Example 1, and Comparative Example 2. Curve L1 represents the frequency response curve of the electronic devices in Experimental Example 1 and Comparative Example 1, meaning the frequency response curves of the electronic devices in Experimental Example 1 and Comparative Example 1 completely overlap. Curve L2 represents the frequency response curve of the electronic device in Comparative Example 2. The difference between Experimental Example 1, Comparative Example 1, and Comparative Example 2 is that the electronic device in Experimental Example 1 has a balanced channel 11 on the frame 1 connecting the rear cavity 52 and the front cavity 51, and the balanced channel 11 is covered with an acoustic resistor 6; the electronic device in Comparative Example 1 has a leakage hole on the second cover 3 that directly connects the rear cavity 52 and the external space; the electronic device in Comparative Example 1 has a balanced channel 11 on the frame 1 connecting the rear cavity 52 and the front cavity 51, and the balanced channel 11 is not covered with an acoustic resistor 6; otherwise, the structures of Experimental Example 1, Comparative Example 1, and Comparative Example 2 are identical.

[0026] The frequency response curve of the electronic device in Experimental Example 1 completely overlaps with that of the electronic device in Comparative Example 1, while curve L1 shows a 5-30 dB decrease in the mid-to-low frequency range compared to curve L2. This indicates that Example 1 and Comparative Example 1 can provide consistent sound quality, while Comparative Example 2, which does not have an acoustic resistor 6, experiences a 5-30 dB decrease in mid-to-low frequency performance due to an acoustic short circuit between the front and rear cavities 52. Therefore, the balanced channel 11 connecting the rear cavity 52 and the front cavity 51, and the acoustic resistor 6 covering the balanced channel 11, can replace the leakage hole that directly connects the rear cavity 52 and the external space in related technologies, achieving the same sound performance.

[0027] The acoustic resistive element 6 can be made of a material with a certain acoustic impedance, such as damping mesh or a waterproof membrane. Optionally, the acoustic resistive element 6 is a mesh structure. Optionally, the acoustic impedance of the acoustic resistive element 6 is 2000~6000 MKS Rayls. The acoustic resistive element 6 can be disposed on the frame 1, either on the side of the frame 1 near the front cavity 51 or on the side of the frame 1 near the rear cavity 52. ​​Of course, if the balance channel 11 has sufficient depth, the acoustic resistive element 6 can also be disposed within the balance channel 11. For example, as shown... Figure 3 In the embodiment shown, the acoustic resistor 6 is attached to the surface of the frame 1 facing the front cavity 51.

[0028] By setting an acoustic resistor 6 covering the balance channel 11, airflow can pass through the acoustic resistor 6, thereby adjusting the air pressure in the rear cavity 52 through the balance channel 11. The acoustic resistor 6 can prevent or reduce the transmission of sound waves between the front cavity 51 and the rear cavity 52 through the balance channel 11, avoid the occurrence of acoustic short circuits, and improve the sound output / reception quality of electronic devices.

[0029] Please see Figures 1 to 3 In one embodiment, the sound channel 12 includes a sound outlet channel 121 and a sound outlet hole 122. The front cavity 51 is connected to the external space through the sound outlet channel 121 and the sound outlet hole 122 in sequence, and the balance channel 11 is connected to the rear cavity 52 and the sound outlet channel 121.

[0030] The sound outlet channel 121 and the sound outlet hole 122 are used to project sound waves outward. The front cavity 51, the sound outlet channel 121, the sound outlet hole 122, and the external space are connected in sequence. The sound waves generated by the vibration of the diaphragm 41 propagate outward from the front cavity 51, the sound outlet channel 121, and the sound outlet hole 122. The balance channel 11 connects the rear cavity 52 and the sound outlet channel 121, so that the rear cavity 52 can maintain air pressure balance with the sound outlet channel 121 and the external space.

[0031] In some embodiments, the frame 1 includes a support plate 13, a first cover 2, the support plate 13 and the second cover 3 are arranged sequentially at intervals along a first direction X, the support plate 13 has a balance channel 11, the sound-emitting unit 4 is fixed on the support plate 13, and at least a portion of the sound-emitting channel 121 is formed between the support plate 13 and the first cover 2.

[0032] The support plate 13 has a first clearance opening 131. The yoke or frame of the sound-generating unit 4 is fixed to the edge of the first clearance opening 131, and the edge of the diaphragm 41 is fixed to the yoke or frame. The diaphragm 41 protrudes from the first clearance opening 131, allowing the sound waves generated by the vibration of the diaphragm 41 to directly enter the front cavity 51 or enter the front cavity 51 through the first clearance opening 131. A sound outlet channel 121 is formed between the support plate 13 and the first cover 2, allowing the sound waves generated by the vibration of the diaphragm 41 to propagate to the external space through the space between the support plate 13 and the first cover 2. The balance channel 11 can be a through hole penetrating the support plate 13 along the first direction X. This through hole can be independently set with respect to the first clearance opening 131, and the acoustic resistor 6 can be attached to the support plate 13.

[0033] When the diaphragm 41 moves towards the rear cavity 52, the air pressure in the rear cavity 52 increases. Airflow sequentially connects the rear cavity 52, the balance channel 11, the sound outlet channel 121, and the sound outlet 122 to the external space, thereby reducing the air pressure in the rear cavity 52. ​​When the diaphragm 41 moves away from the rear cavity 52, the air pressure in the rear cavity 52 decreases. Airflow sequentially enters the rear cavity 52 from the external space, the sound outlet 122, the sound outlet channel 121, and the balance channel 11, thereby increasing the air pressure in the rear cavity 52. ​​Compared to the rear cavity 52 being directly connected to the front cavity 51 via the balance channel 11, the rear cavity 52 being connected to the sound outlet channel 121 avoids or reduces the amount of airflow entering or exiting the rear cavity 52 via the balance channel 11 from entering the front cavity 51, thus avoiding or reducing the impact of airflow entering or exiting the rear cavity 52 via the balance channel 11 on the vibration of the diaphragm 41.

[0034] There are various ways to set the sound outlet 122, and those skilled in the art can set the sound outlet 122 according to their own needs. In some embodiments, the frame 1 includes a side plate 14, the side plate 14 is connected to the support plate 13, the first cover 2 and the second cover 3 are disposed opposite to each other at both ends of the side plate 14 along the first direction X, and the gap between the side plate 14 and the first cover 2 forms the sound outlet 122.

[0035] Optionally, the first cover 2 is a display module of an electronic device. There is an assembly gap between the display module and the frame 1, which can be a sound outlet 122 communicating with the sound outlet channel 121. The balance channel 11 passes through the support plate 13.

[0036] A sound outlet 122 is formed by utilizing the gap between the side panel 14 and the first cover 2 to increase the coverage area of ​​the first cover 2 in the electronic device. For example, when the first cover 2 is a display module, the sound outlet 122 is formed between the side panel 14 and the first cover 2 to increase the screen-to-body ratio of the display module.

[0037] Please see Figure 5 and Figure 6In some other embodiments, the frame 1 further includes a side plate 14, which is connected to the support plate 13. The first cover 2 and the second cover 3 are disposed opposite to each other at both ends of the side plate 14 along the first direction X. The side plate 14 includes a first assembly part 141 and a second assembly part 142 disposed opposite to each other. The gap between the first assembly part 141 and the second assembly part 142 forms part of the sound outlet channel 121. The sound outlet hole 122 passes through the first assembly part 141. The second assembly part 142 is connected to the support plate 13. The balance channel 11 passes through the second assembly part 142.

[0038] The sound waves generated by the vibration of the diaphragm 41 propagate outwards sequentially through the front cavity 51, between the support plate 13 and the first cover 2, between the first assembly part 141 and the second assembly part 142, and through the sound outlet 122. The acoustic resistor 6 can be attached to the second assembly part 142. Compared to the sound outlet 122 being the gap between the side plate 14 and the first cover 2, the sound outlet 122 penetrating the side plate 14 provides a different opening scheme to adapt to different electronic devices.

[0039] For example, in the case where the sound-emitting unit 4 is a multimedia speaker in an electronic device, in order to obtain a larger screen ratio, the sound outlet 122 extends through the side panel 14.

[0040] Please see Figure 7 , Figure 8 and Figure 9 In other embodiments, the electronic device also includes a microphone 8, and the audio channel 12 includes a radio channel 15. The microphone 8, the radio channel 15 and the external space are connected in sequence, and the balanced channel 11 is connected to the rear cavity 52 and the radio channel 15.

[0041] The microphone 8 is a sound-to-electric conversion component in an electronic device, that is, the microphone 8 is a transducer that can convert sound signals into electrical signals. The sound-generating unit 4 provided in this application can be a linear microphone or a non-linear microphone. For example, a linear microphone can be an electromagnetic microphone, a moving-coil microphone, a piezoelectric microphone, or an electret microphone. For example, a non-linear microphone can be a carbon microphone.

[0042] The microphone 8, the radio channel 15, and the external space are connected in sequence. Sound waves from the external space can be transmitted to the microphone 8 through the radio channel 15, and the microphone 8 converts the received sound signal into an electrical signal. By setting a balanced channel 11 to connect the rear cavity 52 and the radio channel 15, the rear cavity 52 can communicate with the external space through the radio channel 15, maintaining the air pressure balance of the rear cavity 52.

[0043] In some embodiments, the electronic device further includes a circuit board 7, a microphone 8 is disposed on the circuit board 7, the frame 1 further includes a support plate 13 and a connecting member 16, the first cover 2, the support plate 13, the circuit board 7 and the second cover 3 are arranged sequentially along the first direction X, the connecting member 16 is disposed between the support plate 13 and the circuit board 7, the radio channel 15 includes a first channel 151 disposed on the support plate 13 and a second channel 152 disposed in the connecting member 16, the first channel 151 communicates with the external space, and the second channel 152 communicates with the microphone 8 and the first channel 151.

[0044] The support plate 13 and the connecting member 16 can be integrally molded parts or assembly parts. Figure 7 In the illustrated embodiment, the support plate 13 and the connecting member 16 are fabricated separately and then assembled together. The first channel 151 can extend in the plane of the support plate 13, and the second channel 152 can extend in the connecting member 16 along the first direction X, so as to reduce the length of the first channel 151 and the second channel 152 and the fabrication difficulty.

[0045] Please refer to the following: Figure 10 and Figure 11 The support plate 13 has a first clearance opening 131. The yoke or frame of the sound-generating unit 4 is fixed to the edge of the first clearance opening 131, and the edge of the diaphragm 41 is fixed to the yoke or frame. The diaphragm 41 protrudes from the first clearance opening 131, allowing the sound waves generated by the vibration of the diaphragm 41 to directly enter the front cavity 51 or enter the front cavity 51 through the first clearance opening 131. The circuit board 7 has a second clearance opening 71 through which the yoke or frame of the sound-generating unit 4 passes. Air between the second cover 3 and the sound-generating unit 4, and air between the support plate 13 and the conductive plate, can circulate through the second clearance opening 71. The sound-generating unit 4 is disposed within the second clearance opening 71, thereby reducing the thickness of the electronic device. The electrical terminals of the sound-generating unit 4 can also be electrically connected to the circuit board 7. The balance channel 11 can be connected to the first channel 151 or the second channel 152.

[0046] The microphone 8 can be mounted on and electrically connected to the circuit board 7, and the electrical signals generated by the microphone 8 can be directly transmitted to the circuit board 7. Sound waves from the external space are transmitted to the microphone 8 sequentially through the first channel 151 and the second channel 152. By providing a connecting piece 16 between the support plate 13 and the circuit board 7, it is ensured that sound waves can be transmitted to the microphone 8 in a relatively independent channel, preventing the front cavity 51 and the receiving channel 15 from being connected, and preventing the sound waves generated by the speaker unit 4 from affecting the microphone 8's acquisition of sound waves from the external space.

[0047] In some embodiments, the microphone 8 is disposed on the side of the circuit board 7 away from the support plate 13, and the circuit board 7 has a through hole 72 that connects the microphone 8 and the second channel 152.

[0048] The first through hole and the second through hole 72 can be coaxially arranged. By providing the second through hole 72 through the circuit board 7, it is ensured that the sound waves in the receiving channel 15 can propagate to the microphone 8 within the closed channel.

[0049] In some embodiments, the connecting member 16 includes a cover plate 161 and a connecting seat 162 disposed on the cover plate 161. The balancing channel 11 includes a third channel 111 and a third through hole 112. At least one of the support plate 13 and the cover plate 161 forms the third channel 111. The third through hole 112 penetrates the cover plate 161 and communicates with the third channel 111. The connecting seat 162 is disposed between the cover plate 161 and the circuit board 7. The second channel 152 penetrates the connecting seat 162 and the cover plate 161.

[0050] At least one of the support plate 13 and the cover plate 161 forms a third channel 111. That is, the third channel 111 can be formed in either the support plate 13 or the cover plate 161, or one of the support plate 13 and the cover plate 161 has a balancing groove 133, and the other is covered on the balancing groove 133 to form the third channel 111.

[0051] The rear cavity 52 can be connected to the external space through the third through hole 112, the third channel 111, and the first channel 151 to balance the air pressure in the rear cavity 52.

[0052] In some embodiments, the support plate 13 has a limiting groove 132, the bottom surface of which is recessed to form a balancing groove 133, and the first channel 151 communicates with the balancing groove 133. A cover plate 161 is disposed within the limiting groove 132, and its periphery is limited by the side surface of the limiting groove 132. The surface of the cover plate 161 facing away from the connecting seat 162 contacts the bottom surface of the limiting groove 132, and together with the balancing groove 133, forms a balancing channel 11. The acoustic damper 6 can be attached to the cover plate 161 and cover the third through hole 112.

[0053] In one embodiment, the first cover 2 is a display module, and the second cover 3 is a battery panel. The electronic device can reuse the display module to form the front cavity 51 and reuse the battery panel to form the rear cavity 52, thereby reducing the size of the electronic device.

[0054] The electronic device provided in this application can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device, augmented reality / virtual reality device, robot, wearable device, super mobile personal computer, netbook, or personal digital assistant, etc., and can also be a personal computer, television, ATM, or self-service machine, etc., and the embodiments of this application do not specifically limit it. The electronic device provided in this application has the same beneficial effects as the aforementioned electronic devices, and will not be repeated here.

[0055] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: The frame has a balanced channel; The first cover and the second cover are disposed on opposite sides of the frame; A sound-generating unit is disposed in the frame, a front cavity is formed between the diaphragm of the sound-generating unit and the first cover, a rear cavity is formed between the second cover and the sound-generating unit, a balance channel connects the rear cavity and the sound channel, the sound channel is connected to the external space, and the sound channel is disposed on the frame or the first cover, or the sound channel is formed between the frame and the first cover. Acoustic resistor covering the balanced channel, wherein the acoustic impedance of the acoustic resistor is greater than or equal to 2000 MKS Rayls; The acoustic damping component is a structural component with holes, and the front cavity is connected to the external space through the acoustic channel.

2. The electronic device according to claim 1, characterized in that, The acoustic damping component is a mesh structure.

3. The electronic device according to claim 1, characterized in that, The sound channel includes a sound outlet channel and a sound outlet hole. The front cavity is connected to the external space in sequence through the sound outlet channel and the sound outlet hole. The balanced channel is connected to the rear cavity and the sound outlet channel.

4. The electronic device according to claim 3, characterized in that, The frame includes: A support plate, a first cover, a support plate and a second cover are arranged sequentially at intervals along a first direction, the sound-emitting unit is fixed on the support plate, and at least a portion of the sound outlet channel is formed between the support plate and the first cover.

5. The electronic device according to claim 4, characterized in that, The frame also includes: A side plate is connected to the support plate. The first cover and the second cover are disposed opposite to each other at both ends of the side plate along the first direction. The gap between the side plate and the first cover forms the sound outlet.

6. The electronic device according to claim 4, characterized in that, The frame also includes: A side plate is connected to the support plate. The first cover and the second cover are disposed opposite to each other at both ends of the side plate along the first direction. The side plate includes a first assembly part and a second assembly part that are disposed at a distance from each other. The gap between the first assembly part and the second assembly part constitutes part of the sound outlet channel. The sound outlet hole passes through the first assembly part. The second assembly part is connected to the support plate. The balance channel passes through the second assembly part.

7. The electronic device according to claim 1, characterized in that, The electronic device also includes a microphone, the audio channel includes a radio channel, the microphone, the radio channel and the external space are connected in sequence, and the balanced channel is connected to the rear cavity and the radio channel.

8. The electronic device according to claim 7, characterized in that, The electronic device further includes a circuit board, the microphone is disposed on the circuit board, the frame further includes a support plate and a connecting member, the first cover, the support plate, the circuit board and the second cover are arranged sequentially along a first direction, the connecting member is disposed between the support plate and the circuit board, the receiving channel includes a first channel disposed in the support plate and a second channel disposed in the connecting member, the first channel communicates with the external space, and the second channel communicates with the microphone and the first channel.

9. The electronic device according to claim 8, characterized in that, The microphone is disposed on the side of the circuit board away from the support plate, and the circuit board has a through hole that connects the microphone and the second channel.

10. The electronic device according to claim 8, characterized in that, The connecting member includes a cover plate and a connecting seat disposed on the cover plate. The balancing channel includes a third channel and a third through hole. At least one of the support plate and the cover plate forms the third channel. The third through hole penetrates the cover plate and communicates with the third channel. The connecting seat is disposed between the cover plate and the circuit board. The second channel penetrates the connecting seat and the cover plate.

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