Electronic device

Abstract

The utility model relates to the technical field of electronic products, and provides an electronic device which comprises a device body, a sensor assembly and an electromagnetic sealing assembly, and a containing cavity used for containing a loudspeaker is formed in the device body. The sensor assembly comprises a supporting structure and a dynamic strain sensor, and the supporting structure is arranged on the cavity wall of the accommodating cavity; the supporting structure is provided with an air leakage channel, the air leakage channel is used for communicating the containing cavity with the external environment, and the dynamic strain sensor is arranged on the supporting structure and used for detecting air pressure information in the containing cavity. The electromagnetic sealing assembly is suitable for selectively opening or closing the air leakage channel according to the air pressure information. According to the utility model, the dynamic strain sensor is used for detecting the air pressure information in the accommodating cavity, and the electromagnetic sealing assembly selectively opens or closes the air leakage channel according to the air pressure information, so that the air pressure of the accommodating cavity and the air pressure of the external environment are balanced, the use environment of the loudspeaker is satisfied, the performance of the loudspeaker is improved, and the service life of the loudspeaker is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products, in particular to an electronic device. Background Art

[0002] A loudspeaker, commonly known as a "horn," is an electroacoustic transducer that converts electrical signals into acoustic signals and is used in electronic and electrical devices that produce sound. The performance of a loudspeaker significantly impacts sound quality. Audio energy, through electromagnetic, piezoelectric, or electrostatic effects, causes the cone or diaphragm to vibrate, resonating with the surrounding air and producing sound.

[0003] In related technologies, a storage cavity for installing speakers is set in electronic devices. The air pressure in the storage cavity can easily affect the sound quality of the speaker, such as distortion of the sound source. For this reason, some products set the speaker in a cavity independent of the motherboard. The cavity is not sealed and can directly contact the outside air, thereby achieving air pressure balance.

[0004] Although the above method can solve the problem of the air pressure in the sealed cavity affecting the sound quality of the speaker, the speaker is located in an unsealed cavity and is at risk of water ingress and other impurities, which can easily affect the reliability of the speaker. Utility Model Content

[0005] The utility model provides an electronic device for solving the defect in the prior art that the speaker is located in an unsealed cavity in order to solve the problem of air pressure balance in the cavity where the speaker is located. While ensuring that the speaker is in a sealed environment, the air pressure in the accommodating cavity and the air pressure in the external environment can be balanced to meet the use environment of the speaker and improve the performance and service life of the speaker.

[0006] The utility model provides an electronic device, comprising an equipment body, a sensor component and an electromagnetic sealing component.

[0007] The interior of the device body is structured with a housing cavity for accommodating the speaker.

[0008] The sensor assembly is arranged on the cavity wall of the accommodating cavity, including a supporting structure and a dynamic strain sensor. The supporting structure is provided with an air leakage channel, which is used to connect the accommodating cavity and the external environment; the dynamic strain sensor is arranged on the supporting structure, and the dynamic strain sensor is used to detect the air pressure information in the accommodating cavity.

[0009] The electromagnetic sealing component is arranged on the cavity wall of the accommodating cavity and is suitable for selectively opening or closing the air leakage channel according to the air pressure information.

[0010] According to the electronic device provided by the present invention, the air leakage channel includes an air leakage cavity and an air leakage port that are interconnected, the air leakage cavity is formed by an inward depression of the end surface of the support structure, and the air leakage port is located on the side wall of the support structure; the electromagnetic sealing assembly is located at the position of the air leakage port, and is used to selectively open or close the air leakage port according to the air pressure information.

[0011] According to the electronic device provided by the present invention, the dynamic strain sensor includes a first resin layer, a piezoelectric film, and a second resin layer stacked in sequence, either the first resin layer or the second resin layer is fixedly connected to the supporting structure, and the piezoelectric film is configured to generate an electrical signal according to deformation.

[0012] According to the electronic device provided by the present invention, the first resin layer and the second resin layer are both PET resin layers.

[0013] According to the electronic device provided by the present invention, the electromagnetic sealing assembly includes a mounting component, a sealing component and a driving component; the mounting component limits a receiving groove; the sealing component is located in the receiving groove and is guided and matched with the mounting component; the driving component is suitable for driving the sealing component to move along the inner wall of the receiving groove to open or close the air leakage channel.

[0014] According to the electronic equipment provided by the present invention, the driving component includes a coil winding, a permanent magnet and a transmission component made of metal material.

[0015] The permanent magnet is arranged on the mounting component and close to the support structure; the transmission component is rotatably connected to the mounting component, one end of the transmission component is arranged on the coil winding, and the other end of the transmission component is movably matched with the sealing component.

[0016] According to the electronic device provided by the present invention, a guide piece is provided on one of the transmission component and the sealing component, and a fitting piece movably fitted with the guide piece is provided on the other of the transmission component and the sealing component.

[0017] According to the electronic device provided by the present invention, a notch is provided on one side of the mounting component close to the coil winding; the transmission component is rotatably arranged in the notch, the permanent magnet is arranged on one side of the notch, and the permanent magnet is arranged close to the supporting structure.

[0018] According to the electronic device provided by the present invention, the device body includes a shell and a cover body, the interior of the shell is constructed with the accommodating cavity and an opening connected to the accommodating cavity, the cover body is covered with the opening, and the cover body is provided with an air leakage hole connected to the air leakage channel.

[0019] According to the electronic device provided by the present invention, it also includes a control component, which is electrically connected to the dynamic strain sensor and the electromagnetic sealing component respectively, and is used to control the movement of the electromagnetic sealing component according to the air pressure information detected by the dynamic strain sensor to open or close the air leakage channel.

[0020] The electronic device provided by the utility model comprises a sensor assembly and an electromagnetic sealing assembly within the housing cavity where the speaker is located. The sensor assembly includes a support structure and a dynamic strain sensor. The support structure is provided with an air release channel. The dynamic strain sensor is used to detect air pressure information within the housing cavity. The electromagnetic sealing assembly selectively opens or closes the air release channel based on the air pressure information to achieve equilibrium between the air pressure within the housing cavity and the air pressure of the external environment, thereby meeting the operating environment of the speaker and improving the performance and service life of the speaker. This prevents problems such as abnormal air pressure within the housing cavity where the speaker is located due to the operating environment or temperature differences, which may cause abnormal sound output from the speaker, thereby improving the reliability of the speaker.

[0021] In addition, since the loudspeaker is independently located in the accommodating cavity, and a sensor assembly and an electromagnetic sealing assembly are also provided in the accommodating cavity, impurities such as water can be prevented from entering the accommodating cavity, thereby improving the reliability of the loudspeaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of a partial structure of an electronic device provided by an embodiment of the present utility model.

[0024] Figure 2 It is a structural schematic diagram of the sensor assembly and electromagnetic sealing assembly provided by an embodiment of the present utility model.

[0025] Figure 3 It is a structural schematic diagram of the sensor assembly provided by an embodiment of the present utility model.

[0026] Figure 4 It is a structural schematic diagram of the electromagnetic sealing assembly provided by an embodiment of the utility model.

[0027] Figure 5 It is a structural schematic diagram of the sealing component provided by an embodiment of the present utility model being located in the first position.

[0028] Figure 6It is a structural schematic diagram of the sealing component provided by an embodiment of the present utility model being located in the second position.

[0029] Figure 7 This is a system block diagram of an electronic device provided by an embodiment of the present utility model.

[0030] Reference numerals:

[0031] 100, device body; 110, housing; 111, accommodating cavity; 120, cover; 121, air vent;

[0032] 200, sensor assembly; 210, support structure; 211, air release cavity; 212, air release port; 220, dynamic strain sensor; 221, first resin layer; 222, piezoelectric film; 2221, electrode; 223, second resin layer;

[0033] 300, electromagnetic sealing assembly; 310, mounting component; 311, accommodating groove; 312, notch; 320, sealing component; 321, matching component; 330, driving component; 331, coil winding; 332, permanent magnet; 333, transmission component; 3331, guide component. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0036] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0038] Figure 1 It is a schematic diagram of a partial structure of an electronic device provided by an embodiment of the present utility model. Figure 2 It is a structural schematic diagram of the sensor assembly and electromagnetic sealing assembly provided by an embodiment of the present utility model.

[0039] See Figure 1 and Figure 2 An embodiment of the present invention provides an electronic device, which may be an audio device, a video playback device, such as a speaker box. A speaker is provided inside the electronic device, which may convert electrical signals into sound signals. The performance of the speaker has a great influence on the sound quality of the speaker box.

[0040] When the speaker is installed in an electronic device (such as a sound box), a housing cavity 111 for accommodating the speaker is constructed inside the device body 100 of the electronic device. The sensor assembly 200 and the electromagnetic sealing assembly 300 are also arranged in the housing cavity 111.

[0041] Sensor assembly 200 includes a support structure 210 and a dynamic strain sensor 220. Support structure 210 is mounted on the wall of chamber 111. Support structure 210 defines an air vent channel, which connects chamber 111 to the external environment. The shape of the air vent channel is not specifically limited and can be rectangular or circular, as long as it can connect chamber 111 to the external environment. Dynamic strain sensor 220 is mounted on support structure 210 and is used to detect air pressure information within chamber 111.

[0042] The electromagnetic sealing assembly 300 is arranged on the cavity wall of the accommodating cavity 111. The electromagnetic sealing assembly 300 is equivalent to an actuator, which is used to selectively open or close the air leakage channel according to the air pressure information in the accommodating cavity 111 detected by the dynamic strain sensor 220, so that the air pressure in the accommodating cavity 111 where the speaker is located is within a preset air pressure range, so that the air pressure information in the accommodating cavity 111 where the speaker is located is balanced, thereby improving the performance and service life of the speaker.

[0043] It is understandable that the electronic device provided by the embodiment of the present invention, by disposing a sensor assembly 200 and an electromagnetic sealing assembly 300 in the accommodating cavity 111 where the speaker is located, and making the sensor assembly 200 include a support structure 210 and a dynamic strain sensor 220, the support structure 210 is provided with an air release channel, the dynamic strain sensor 220 is used to detect the air pressure information in the accommodating cavity 111, and the electromagnetic sealing assembly 300 can selectively open or close the air release channel according to the air pressure information to achieve a balance between the air pressure in the accommodating cavity 111 and the air pressure in the external environment, meet the use environment of the speaker, and improve the performance and service life of the speaker. It avoids problems such as abnormal air pressure in the accommodating cavity where the speaker is located due to the use environment or temperature difference, which may cause abnormal sound from the speaker, thereby improving the reliability of the speaker.

[0044] In addition, since the speaker is independently located in the accommodating cavity 111 and a sensor assembly and an electromagnetic sealing assembly are also provided in the accommodating cavity 111, impurities such as water can be prevented from entering the accommodating cavity, thereby improving the reliability of the speaker.

[0045] It should be noted that the dynamic strain sensor 220 and the electromagnetic sealing assembly 300 may be electrically connected to the control assembly of the electronic device respectively, or the dynamic strain sensor 220 and the electromagnetic sealing assembly 300 may be independently provided and controlled accordingly.

[0046] When the dynamic strain sensor 220 and the electromagnetic sealing assembly 300 are respectively electrically connected to the control assembly of the electronic device, the control assembly receives the air pressure information in the accommodating cavity 111 transmitted by the dynamic strain sensor 220, compares it with the preset air pressure, and controls the movement of the electromagnetic sealing assembly 300 according to the comparison result to open or close the air leakage channel.

[0047] When the dynamic strain sensor 220 and the electromagnetic sealing assembly 300 are set independently of each other and are controlled accordingly, a prompt module, such as a voice prompt module or an indicator light prompt module, can be electrically connected to the dynamic strain sensor 220. When the air pressure information detected by the dynamic strain sensor 220 is not within the preset air pressure information range, the prompt module issues a prompt message. At this time, the electromagnetic sealing assembly 300 can be controlled to move to selectively open or close the air leakage channel.

[0048] Figure 3 It is a structural diagram of the sensor assembly 200 provided in an embodiment of the present utility model.

[0049] See Figure 3 In some embodiments of the present invention, the support structure 210 may be a rectangular structure, and the specific shape may be determined according to the shape of the dynamic strain sensor 220 and the installation position of the dynamic strain sensor 220. The support structure 210 mainly plays the role of connection and support.

[0050] The air release channel includes an air release cavity 211 and an air release port 212 that are interconnected. The air release cavity 211 is formed by an inward depression of the end surface of the support structure 210. The shape of the air release cavity 211 is the same as that of the support structure 210 and can be rectangular or circular. The air release port 212 is located on the side wall of the support structure 210.

[0051] The electromagnetic sealing assembly 300 is located at the location of the air vent 212 and is used to selectively open or close the air vent 212 according to the air pressure information. When the electromagnetic sealing assembly 300 opens the air vent 212, the accommodating chamber 111 is connected to the external environment through the air vent 212 and the air vent chamber 211, thereby achieving air pressure balance.

[0052] Equivalently, in the embodiment of the present invention, the air leakage chamber 211 is directly connected to the external environment, and the accommodating chamber 111 can be connected to the external environment by simply controlling the movement of the electromagnetic sealing assembly 300 to open or close the air leakage port 212.

[0053] Continue reading Figure 3In some embodiments of the present invention, the dynamic strain sensor 220 includes a first resin layer 221, a piezoelectric film 222, and a second resin layer 223 stacked in sequence, either of the first resin layer 221 and the second resin layer 223 is fixedly connected to the support structure 210, an electrode 2221 is extended on the piezoelectric film 222, and the piezoelectric film 222 is configured to generate an electrical signal according to deformation.

[0054] Equivalently, the dynamic strain sensor 220, that is, the thin film sensor, is composed of two resin layers, a piezoelectric film 222 and a support structure 210, wherein the first resin layer 221 and the second resin layer 223 are both PET resin layers, that is, the resin layer is made of PET material, and the piezoelectric film 222 is made of PVDF piezoelectric material, that is, the thin film sensor uses PET material as the bottom and top materials, with PVDF piezoelectric material sandwiched in the middle, and two electrodes 2221 are led out from the PVDF piezoelectric material, and the two electrodes 2221 are used to electrically connect to the chip of the control component.

[0055] It should be noted that the first resin layer 221, the piezoelectric film 222 and the second resin layer 223 can be welded and fixed, the support structure 210 can be in direct contact with the inner wall of the device body 100 and fixed using fasteners and other structures. The support structure 210 can also be fixed to the inner wall of the device body 100 by gluing.

[0056] Among them, the overall structure of the dynamic strain sensor 220 can be bonded and fixed to the side of the support structure 210 facing away from the device body 100, so that a certain gap is left between the dynamic strain sensor 220 and the inner wall of the device body 100, and by setting an air discharge channel on the support structure 210, the air pressure balance between the accommodating cavity 111 and the external environment can be achieved.

[0057] Among them, the piezoelectric film 222 can be a piezoelectric polyvinylidene fluoride (PVDF) polymer film. When the piezoelectric film 222 is stretched or bent, an electrical signal (charge or voltage) is generated between the upper and lower electrodes 2221 of the piezoelectric film 222. The electrical signal is proportional to the deformation of the piezoelectric film 222 when stretched or bent.

[0058] Even a small force applied longitudinally to the piezoelectric film 222 generates significant stress in the transverse direction. Applying the same force over a large area of ​​the piezoelectric film 222 produces much less stress. Therefore, the piezoelectric film 222 is very sensitive to dynamic stress. The typical sensitivity for a 28μm-thick PVDF film is 10-15mV per microstrain (parts per million change in length).

[0059] Figure 4 It is a structural diagram of the electromagnetic sealing assembly 300 provided in an embodiment of the present utility model.

[0060] See Figure 4 In some embodiments of the present invention, the electromagnetic sealing assembly 300 includes a mounting component 310 , a sealing component 320 and a driving component 330 .

[0061] The mounting member 310 is a rectangular frame structure, defining a rectangular receiving groove 311 within the mounting member 310. A sealing member 320 is located within the receiving groove 311 and can be a sheet-like structure. The sealing member 320 is guided and engaged with the mounting member 310, allowing it to move within the receiving groove 311. A driving member 330 drives the sealing member 320 along the inner wall of the receiving groove 311 to open or close the air leakage channel.

[0062] In other words, the mounting component 310 is mainly used to provide support and limit the sealing component 320 and the driving component 330, so that the sealing component 320 and the driving component 330 are fixed to the device body 100 through the mounting component 310. In addition, a slider or a slide rail can be provided on the inner wall of the mounting component 310, so that the sealing component 320 can be guided and cooperated with the slider or the slide rail to achieve relative movement between the sealing component 320 and the mounting component 310, so that the sealing component 320 moves to abut against the side wall of the support structure 210 to block the air vent 212, or the sealing component 320 moves away from the side wall of the support structure 210 to open the air vent 212.

[0063] The drive component 330 may be a linear actuator, or a drive structure capable of converting rotary motion into linear reciprocating motion. When the drive component 330 is a linear actuator, it may be a structure such as a cylinder or a linear motor. When the drive component 330 is a drive structure capable of converting rotary motion into linear reciprocating motion, it may be an electromagnetic drive component.

[0064] Continue reading Figure 4 In some embodiments of the present invention, the driving component 330 includes a coil winding 331 , a transmission component 333 made of metal material, and a permanent magnet 332 .

[0065] The permanent magnet 332 is installed on the side close to the support structure 210, and the transmission component 333 is rotatably connected to the mounting component 310 through a rotating shaft and other components. The transmission component 333 is a long strip structure, which is equivalent to the transmission component 333 being the iron core of the coil winding 331. One end of the transmission component 333 is arranged on the coil winding 331, and the other end of the transmission component 333 is movably cooperated with the sealing component 320.

[0066] It should be noted that, in order to avoid electromagnetic interference, the supporting structure 210 and the mounting component 310 and other structures are all made of non-metallic materials.

[0067] When the coil winding 331 is de-energized, the metal transmission component 333 and the permanent magnet 332 attract each other. At this point, the transmission component 333 pushes the sealing component 320 against the sidewall of the support structure 210, thereby blocking or closing the vent 212. When the coil winding 331 is energized, the metal transmission component 333 is magnetized to generate a magnetic force. The direction of the magnetic force of the transmission component 333 is opposite to the direction of the magnetic force of the permanent magnet 332, causing the transmission component 333 to deflect away from the permanent magnet 332, that is, away from the support structure 210. At this point, the transmission component 333 drives the sealing component 320 away from the sidewall of the support structure 210, thereby opening the vent 212 and achieving air pressure balance.

[0068] Figure 5 It is a structural schematic diagram of the sealing component 320 provided by an embodiment of the present utility model being located at the first position. Figure 6 It is a structural schematic diagram of the sealing component 320 provided in an embodiment of the present utility model being located in the second position.

[0069] See Figure 5 Specifically, when the sealing component 320 is in the first position, that is, the coil winding 331 is energized, the metal transmission component 333 is magnetized to generate magnetic force, and the direction of the magnetic force of the transmission component 333 is opposite to the direction of the magnetic force of the permanent magnet 332. The transmission component 333 deflects in the direction away from the permanent magnet 332, that is, the transmission component 333 deflects to the side away from the support structure 210. At this time, the transmission component 333 drives the sealing component 320 away from the side wall of the support structure 210 to open the air vent 212 for air pressure balance.

[0070] See Figure 6 Specifically, when the sealing component 320 is in the second position, that is, the coil winding 331 is not energized, the metal transmission component 333 and the permanent magnet 332 are attracted to each other. At this time, the transmission component 333 pushes the sealing component 320 to abut against the side wall of the support structure 210 to close the air leakage port 212.

[0071] Continue reading Figures 4 to 6 In some embodiments of the present invention, a guide member 3331 is provided on one of the transmission member 333 and the sealing member 320 , and a fitting member 321 that movably cooperates with the guide member 3331 is provided on the other of the transmission member 333 and the sealing member 320 .

[0072] For example, a raised column or boss structure is provided on the transmission component 333 to form a guide member 3331, and a hollow groove for the guide member 3331 to pass through is opened on the sealing component 320 to form a matching member 321. The guiding cooperation between the transmission component 333 and the sealing component 320 is achieved through the cooperation between the guide member 3331 and the hollow groove.

[0073] When the transmission component 333 deflects, the guide member 3331 tends to deflect along with the transmission component 333. Since the sealing component 320 is restricted by the mounting component 310, when the guide member 3331 deflects, it pushes the sealing component 320 to perform a linear reciprocating motion along the inner wall of the mounting component 310, thereby opening or closing the air vent 212.

[0074] Of course, the guide member 3331 can also be set on the sealing member 320, and the matching member 321 can be opened on the transmission member 333. The specific movement method is the same as the above movement method and will not be repeated here.

[0075] Continue reading Figures 4 to 6 In some embodiments of the present invention, a notch portion 312 is provided on one side of the mounting component 310 close to the coil winding 331 ; a transmission component 333 is rotatably disposed in the notch portion 312 , a permanent magnet 332 is disposed on one side of the notch portion 312 , and the permanent magnet 332 is disposed close to the support structure 210 .

[0076] In other words, to make the electromagnetic seal assembly 300 more compact and require less installation space, a notch 312 is provided on the side of the mounting member 310 near the coil winding 331, so that the transmission member 333 can be embedded in the notch 312. When the transmission member 333 is rotated and positioned in the notch 312, the height of the transmission member 333 does not exceed the height of the mounting member 310, resulting in a more compact structure.

[0077] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the device body 100 includes a shell 110 and a cover 120. The interior of the shell 110 is configured with a accommodating cavity 111 and an opening connected to the accommodating cavity 111. The cover 120 covers the opening and is provided with an air leakage hole 121 connected to the air leakage channel.

[0078] In other words, the device body 100 is composed of two independently arranged parts. The sensor component 200 and the electromagnetic sealing component 300 can be set on the cover body 120 by gluing to form a combination, and the position of the vent hole 121 on the cover body 120 corresponds to the position of the sensor component 200. Then, the combination as a whole and the cover are set on the shell 110 to close the opening on the shell 110.

[0079] Figure 7 This is a system block diagram of an electronic device provided by an embodiment of the present utility model.

[0080] See Figure 7The electronic device provided by the embodiment of the present invention also includes a control component, which can be a DSP chip. The control component is electrically connected to the dynamic strain sensor 220 and the electromagnetic sealing component 300 respectively, and is used to control the movement of the electromagnetic sealing component 300 according to the air pressure information detected by the dynamic strain sensor 220 to open or close the air leakage channel.

[0081] That is, the DSP chip is electrically connected to the dynamic strain sensor 220 and the electromagnetic sealing assembly 300 respectively, and the DSP chip is also connected to the speaker through the power amplifier.

[0082] When the speaker vibrates and the electromagnetic seal assembly 300 is inoperative, the dynamic strain sensor 220 detects the speaker's sound output. If the speaker continues to operate for a specified threshold time without stopping, the system determines that the speaker is experiencing an abnormal sound output, reports an abnormality log, and stops the speaker from producing sound. If the dynamic strain sensor 220 detects that the sound pressure produced by the speaker exceeds a set standard, the system determines that the speaker is using excessive power. Multiple power overloads are detected and reported to the system.

[0083] The specific signal logic for air pressure information detection and speaker sound condition detection is as follows: when the speaker is not working, the dynamic strain sensor 220 detects the air pressure information in the accommodating cavity 111. When the speaker is working, the dynamic strain sensor 220 detects the speaker sound condition.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electronic device, characterized in that: include: The device body has an internal structure with a housing cavity for accommodating the speaker; a sensor assembly disposed on a cavity wall of the accommodating cavity, the sensor assembly comprising a support structure and a dynamic strain sensor, the support structure being provided with an air release channel for connecting the accommodating cavity with the external environment; the dynamic strain sensor being disposed on the support structure for detecting air pressure information within the accommodating cavity; The electromagnetic sealing component is arranged on the cavity wall of the accommodating cavity and is suitable for selectively opening or closing the air leakage channel according to the air pressure information.

2. The electronic device according to claim 1, wherein The air leakage channel includes an air leakage cavity and an air leakage port that are interconnected, the air leakage cavity is formed by an inward depression of the end surface of the support structure, and the air leakage port is located on the side wall of the support structure; The electromagnetic sealing assembly is located at the position where the air leakage port is located, and is used to selectively open or close the air leakage port according to the air pressure information.

3. The electronic device according to claim 1, wherein The dynamic strain sensor includes a first resin layer, a piezoelectric film, and a second resin layer stacked in sequence. Either the first resin layer or the second resin layer is fixedly connected to the support structure. The piezoelectric film is configured to generate an electrical signal according to deformation.

4. The electronic device according to claim 3, wherein: The first resin layer and the second resin layer are both PET resin layers.

5. The electronic device according to claim 1, wherein The electromagnetic sealing assembly comprises: Installing components to limit the accommodating groove; A sealing component is located in the accommodating groove and is guided and matched with the mounting component; The driving component is adapted to drive the sealing component to move along the inner wall of the accommodating groove to open or close the air leakage channel.

6. The electronic device according to claim 5, characterized in that The driving component includes: Coil winding; a permanent magnet, disposed on the mounting component and close to the support structure; A transmission component made of metal is rotatably connected to the mounting component. One end of the transmission component is arranged on the coil winding, and the other end of the transmission component is movably matched with the sealing component.

7. The electronic device according to claim 6, wherein: A guide piece is provided on one of the transmission component and the sealing component, and a matching piece movably matched with the guide piece is provided on the other of the transmission component and the sealing component.

8. The electronic device according to claim 6, wherein: A notch is provided on one side of the mounting component close to the coil winding; The transmission component is rotatably arranged in the notch portion, the permanent magnet is arranged on one side of the notch portion, and the permanent magnet is arranged close to the supporting structure.

9. The electronic device according to any one of claims 1 to 8, characterized in that: The device body includes a shell and a cover. The interior of the shell is configured with the accommodating cavity and an opening communicating with the accommodating cavity. The cover covers the opening. The cover is provided with an air leakage hole communicating with the air leakage channel.

10. The electronic device according to any one of claims 1 to 8, characterized in that: It also includes a control component, which is electrically connected to the dynamic strain sensor and the electromagnetic sealing component respectively, and is used to control the movement of the electromagnetic sealing component according to the air pressure information detected by the dynamic strain sensor to open or close the air leakage channel.

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