Electronic device

Abstract

The application discloses an electronic device and a control method, and belongs to the field of communication devices. The electronic device comprises a shell, a first opening and a second opening on the surface of the shell, a sound generating unit arranged in the shell, and a first sound guide channel and a second sound guide channel in the shell. The first sound guide channel is connected with a front cavity of the sound generating unit and the first opening, and the second sound guide channel is connected with a rear cavity of the sound generating unit and the second opening. A diaphragm assembly is arranged at the second sound guide channel close to the second opening. The diaphragm assembly comprises a flexible membrane and an electrorheological fluid. The flexible membrane is fixedly connected with the shell. The flexible membrane has a gas permeable hole and a filling cavity which are connected with each other. The electrorheological fluid is filled in the filling cavity. In the case that the sound generating unit is in a receiver mode, the electrorheological fluid avoids the gas permeable hole. In the case that the sound generating unit is in a non-receiver mode, the electrorheological fluid blocks the gas permeable hole.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of communication equipment, and particularly relates to an electronic device. BACKGROUND

[0002] With the continuous development of technology, mobile phones and other communication electronic devices have become one of the indispensable items in people's daily life and have brought people many conveniences. When a mobile phone is used for hand-held calling, since a receiver is close to the top of the mobile phone, and an auricle and a human face cannot completely seal the receiver, the phenomenon of sound reflection and diffraction through the human body will cause the situation of sound leakage, which is easy to leak the privacy of a user and leads to poor user experience. SUMMARY

[0003] Embodiments of the application provide an electronic device to solve the problem that current electronic devices have sound leakage during hand-held calling and are easy to leak the privacy of a user.

[0004] Embodiments of the application disclose an electronic device, which comprises a shell, a first opening and a second opening on the surface of the shell;

[0005] a sound generating unit, which is arranged in the shell, and the shell has a first sound guiding channel and a second sound guiding channel inside, the first sound guiding channel is communicated with a front cavity of the sound generating unit and the first opening, and the second sound guiding channel is communicated with a rear cavity of the sound generating unit and the second opening;

[0006] a diaphragm assembly, which is arranged at the second sound guiding channel close to the second opening, wherein the diaphragm assembly comprises a flexible membrane body and an electrorheological fluid, the flexible membrane body is fixedly connected with the shell, the flexible membrane body has a gas permeable hole and a filling cavity which are communicated with each other, and the electrorheological fluid is filled in the filling cavity;

[0007] in a case that the sound generating unit is in a receiver mode, the electrorheological fluid avoids the gas permeable hole; and in a case that the sound generating unit is in a non-receiver mode, the electrorheological fluid blocks the gas permeable hole.

[0008] The electronic device disclosed by the embodiments of the present application is provided with a sound generating unit in the shell, and the shell is further provided with a first sound guide channel and a second sound guide channel. The sound waves generated by the sound generating unit can propagate from the front cavity to the first opening through the first sound guide channel, and propagate from the rear cavity to the second opening through the second sound guide channel. In the absence of other factors, the sound waves can propagate to the outside of the electronic device through the first opening and the second opening, respectively. The diaphragm of the sound generating unit is arranged in the front cavity, so that the diaphragm of the sound generating unit can prevent water vapor, dust and the like outside the electronic device from entering the sound generating unit, and ensure that the gas can freely enter the inside of the shell from the first opening, and ensure that the sound waves generated by the sound generating unit can be transmitted from the first opening.

[0009] Meanwhile, the diaphragm assembly is arranged at the second sound guide channel close to the second opening, and the diaphragm assembly includes a flexible membrane body and an electrorheological fluid. The flexible membrane body has a gas permeable hole and a filling cavity in communication with each other, and the filling cavity is filled with the electrorheological fluid. The electrorheological fluid is connected to the power supply device of the electronic device, so that the power supply relationship of the electrorheological fluid can be correspondingly controlled according to the mode in which the sound generating unit of the electronic device is located.

[0010] Furthermore, in the case that the sound generating unit is in the receiver mode, the electrorheological fluid is controlled to be powered on, so that the electrorheological fluid avoids the gas permeable hole, thereby ensuring that the gas can normally pass through the flexible membrane body, the sound waves emitted by the sound generating unit can pass through the diaphragm assembly and be transmitted from the second opening, and the sound waves and the sound waves emitted by the sound generating unit from the first opening meet outside the electronic device. By making the sound waves emitted from the first opening and the second opening opposite to each other, the two kinds of sound waves can cancel each other out outside the electronic device, preventing other people or objects outside the user from obtaining the sound information emitted by the sound generating unit, and protecting the privacy of the user.

[0011] In the case that the sound generating unit is in the non-receiver mode, the electrorheological fluid is controlled to be powered off, so that the electrorheological fluid blocks the gas permeable hole. In this case, the sound waves emitted by the sound generating unit cannot pass through the diaphragm assembly and be transmitted from the second opening to the outside of the electronic device, while for the first opening, the sound waves emitted by the sound generating unit can continue to pass through the diaphragm and be transmitted from the first opening to the outside of the electronic device. This can ensure that the sound generating unit can normally work in the speaker mode and other non-receiver modes, and the sound emitted can be normally transmitted to the user's ear. BRIEF DESCRIPTION OF DRAWINGS

[0012] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1is an assembly schematic diagram of the diaphragm assembly in the electronic device disclosed by the embodiment of the present application;

[0014] Figure 2 is Figure 1 is an electrical connection schematic diagram of the diaphragm assembly;

[0015] Figure 3 is Figure 1 is a working principle schematic diagram of the diaphragm assembly;

[0016] Figure 4 is another assembly schematic diagram of the diaphragm assembly in the electronic device disclosed by the embodiment of the present application;

[0017] Figure 5 is a structure schematic diagram of the first conductive plate in the electronic device disclosed by the embodiment of the present application;

[0018] Figure 6 is a cross-sectional schematic diagram of part of the structure of the electronic device disclosed by the embodiment of the present application;

[0019] Figure 7 is a schematic diagram of part of the structure of the electronic device including the lens protection ring disclosed by the embodiment of the present application.

[0020] Explanation of reference signs:

[0021] 110 - shell body, 110a - third sound guide channel, 111 - front shell, 111a - first opening, 112 - rear shell, 112a - second opening, 120 - support, 121 - avoiding cavity, 130 - lens protection ring, 131 - sound guide notch,

[0022] 200 - sound generating unit,

[0023] 300 - diaphragm assembly, 310 - flexible membrane body, 320 - electrorheological fluid, 331 - first conductive plating, 332 - second conductive plating, 340 - spherical top,

[0024] 410 - first conductive plate, 411 - air hole, 420 - second conductive plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] 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 interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0027] The electronic device provided by the embodiments of the present application will be described in detail below in combination with the drawings, through specific embodiments and application scenarios.

[0028] As shown in the Figures 1-7 embodiments of the present application disclose an electronic device, which includes a shell 110, a sound generating unit 200, a diaphragm assembly 300. Of course, the electronic device can also include a power supply device such as a battery, and a device with control function such as a chip, to ensure that the sound generating unit 200 and the diaphragm assembly 300 and other devices in the electronic device can produce corresponding actions in different working scenarios.

[0029] Among them, the shell 110 is a device in the electronic device for providing protection for other devices, and the shell 110 can be used as the mounting base of other devices in the electronic device, such as the sound generating unit 200 and the diaphragm assembly 300. The devices can be directly or indirectly mounted on the shell 110 through adhesion or screws and other connecting members. The shell 110 can be formed of hard materials such as plastic or metal, and its specific shape and structure and other parameters can be determined according to actual needs, which are not limited here. Specifically, according to the shape and layout of the devices that need to be mounted on the shell 110, corresponding recesses or hollow structures can be formed on the shell 110 to facilitate the installation of other devices.

[0030] And the shell 110 can be provided with a cavity such as a containing cavity inside, which can provide containing action for the battery and mainboard and other devices in the electronic device; of course, the containing cavity can also provide containing action for the sound generating unit 200, and make the sound emitted by the sound generating unit 200 can be transmitted outward through the containing cavity. At the same time, the surface of the shell 110 is provided with a first opening 111a and a second opening 112a, and the first opening 111a and the second opening 112a are in communication with the containing cavity, which can ensure that the sound wave emitted by the sound generating unit 200 can be transmitted to the outside of the shell 110 of the electronic device through the first opening 111a and the second opening 112a in the absence of other devices or factors interference.

[0031] More specifically, the housing 110 has a first sound guide channel and a second sound guide channel inside, the first sound guide channel is in communication with the front cavity of the sound production unit 200 and the first opening 111a, so as to ensure that the sound waves produced by the sound production unit 200 can be transmitted from the front cavity and then from the first opening 111a through the first sound guide channel; correspondingly, the second sound guide channel is in communication with the rear cavity of the sound production unit 200 and the second opening 112a, so as to ensure that the sound waves produced by the sound production unit 200 can be transmitted from the rear cavity and then from the second opening 112a through the second sound guide channel without the interference of other factors.

[0032] Optionally, the first opening 111a and the second opening 112a are located on the mutually adjacent sides of the housing 110, for example, one of the first opening 111a and the second opening 112a can be arranged on the front side (i.e. the side on which the screen is located) of the housing 110, and the other can be arranged on the side adjacent to the front side of the housing 110, and by setting the positions and other parameters of the first opening 111a and the second opening 112a, the phases of the sound waves transmitted from the first opening 111a and the second opening 112a are opposite to each other, so that the two kinds of sound waves cancel each other out. In another embodiment of the present application, the first opening 111a and the second opening 112a can be arranged opposite to each other on the housing 110, so that the sound produced by the sound production unit 200 can be transmitted to the outside of the housing 110 through the first opening 111a and the second opening 112a respectively without the interference of other factors, and it is easier to ensure that the sound waves transmitted from the first opening 111a and the second opening 112a are opposite to each other, reducing the design difficulty.

[0033] Based on the above, in the case that the electronic device uses the sound production unit 200 as a receiver, that is, in the process of the user making a call using the electronic device, by making the first opening 111a and the second opening 112a transmit opposite sound waves to the outside of the electronic device respectively, the sound waves cancel each other out during the process of transmitting to the outside of the electronic device, preventing other people or objects outside the user from obtaining the user's call content, and further preventing the user's privacy from being leaked.

[0034] Of course, in order to prevent water vapor or dust outside the electronic device from entering the sound generating unit 200 from the first opening 111a and / or the second opening 112a, which will adversely affect the normal operation and service life of the sound generating unit 200, in the embodiments of the present application, the sound generating unit 200 itself generally includes a diaphragm, which is an important component device in the sound generating unit 200. The diaphragm is located in the front cavity of the sound generating unit 200, so that the diaphragm of the sound generating unit 200 can be used to separate the electronic devices in the sound generating unit 200 and the first opening 111a. Therefore, with the waterproof function of the diaphragm itself, even if dust or water vapor can enter the electronic device from the first opening 111a, water vapor or dust will not enter the sound generating unit 200, damaging the electronic devices in the sound generating unit 200.

[0035] As for the second opening 112a, in order to ensure that it has both waterproof performance and air permeability, in the embodiments of the present application, the electronic device includes a diaphragm assembly 300, which is arranged at the second sound guide channel close to the second opening 112a, thereby providing the second opening 112a with a waterproof function by the diaphragm assembly 300. Specifically, compared with the sound generating unit 200, the diaphragm assembly 300 can be relatively closer to the second opening 112a, thereby maximizing the prevention of external dust and water vapor from entering the electronic device from the second opening 112a.

[0036] The diaphragm assembly 300 includes a flexible membrane body 310 and an electrorheological fluid 320, and the flexible membrane body 310 is fixedly connected with the shell 110, so that the entire diaphragm assembly 300 can form a relatively reliable connection relationship with the shell 110. Of course, since the flexible membrane body 310 is flexible, and in the case that the flexible membrane body 310 forms a fixed connection relationship with the shell 110, the flexible membrane body 310 can also move relative to the shell 110 by deforming itself to produce a vibration effect.

[0037] In addition, the flexible membrane body 310 is a waterproof and air-permeable structure, that is, the flexible membrane body 310 has air holes to ensure that sound waves can pass through the air holes of the flexible membrane body 310. At the same time, the flexible membrane body 310 has a filling cavity, which is in communication with the air holes, and the electrorheological fluid 320 is filled in the filling cavity. By connecting the electrorheological fluid 320 with the power supply device such as a battery, it is ensured that the on-off between the electrorheological fluid 320 and the power supply device can be controlled, so as to change the physical properties of the electrorheological fluid 320 by changing the power supply or not. Of course, in order to realize the foregoing control process, the electronic device includes a controller, which can be the above-mentioned chip, and of course, an additional control device can also be configured to control the power-on state of the electrorheological fluid 320.

[0038] Specifically, the electrorheological fluid can generally be formed by dispersing solid microparticles with high dielectric constant in a liquid matrix with low dielectric constant, which can be regarded as a special suspension system. In the absence of an electric field, the solid microparticles are randomly distributed in the liquid matrix, and in this state, the electrorheological fluid is similar to a common Newtonian fluid, and gas cannot pass through the electrorheological fluid; when an electric field is applied to the electrorheological fluid, the solid microparticles are instantaneously polarized into electric dipoles, the interaction between the particles causes the solid particles to form chains, and further form columnar structures, thereby forming a yield stress, and in this state, gas can pass through the channels between the columnar structures formed by the fixed particles in the electrorheological fluid, thereby enabling the electrorheological fluid to be gas permeable. Moreover, the change of the electrorheological fluid between the above states is reversible, and after the electric field is removed, it will instantaneously (on the order of milliseconds) return to the original state.

[0039] Based on the fact that the electrorheological fluid 320 is included in the present embodiment, the diaphragm assembly 300 can have the ability to be overall gas permeable and waterproof under corresponding conditions, and the power supply relationship of the electrorheological fluid 320 can be controlled according to the mode in which the sound generating unit 200 is located in the electronic device, the state of the electrorheological fluid is correspondingly controlled, and the diaphragm assembly 300 is correspondingly switched between the gas permeable state and the non-gas permeable state.

[0040] More specifically, in the case where the sound generating unit 200 is in the receiver mode, in order to prevent sound leakage from the first opening 111a or the second opening 112a towards the user's ear, the power supply device and the like in communication with the electrorheological fluid 320 can be controlled, and the electrorheological fluid 320 is switched under the action of the electric field to avoid the gas permeable hole, thereby ensuring that the space outside the electronic device is in communication with the inside of the shell 110 through the second opening 112a or the first opening 111a away from the user's ear, and the sound waves generated by the sound generating unit 200 can be transmitted from the second opening 112a or the first opening 111a, and the sound waves leaked from the first opening 111a or the second opening 112a are mutually offset.

[0041] In the case that the sound generating unit 200 is in a non-receiver mode, which can be a speaker mode or a closed mode, in order to prevent water vapor outside the electronic device from entering the sound generating unit 200 from the second opening 112a or the first opening 111a away from the diaphragm of the sound generating unit 200, which would adversely affect the reliability and service life of the sound generating unit 200, the power supply device and the like can be controlled to be disconnected from the electro-rheological fluid 320, so that the electro-rheological fluid 320 is not affected by the electric field, and the solid particles in the electro-rheological fluid 320 return to a state of chaotic distribution, so that the electro-rheological fluid 320 blocks the air holes, and the space inside the electronic device is isolated from the second opening 112a or the first opening 111a away from the diaphragm of the sound generating unit 200, so that water vapor outside the electronic device cannot enter the sound generating unit 200 from the second opening 112a or the first opening 111a. At the same time, in the above mode, the sound waves generated by the sound generating unit 200 in the accommodating cavity will not propagate to the outside of the electronic device from the second opening 112a, so that in the speaker mode of the sound generating unit 200, sound will not be transmitted from the second opening 112a, which will not hinder the normal operation of the sound generating unit 200 as a speaker.

[0042] The electronic device disclosed in the embodiments of the present application has a sound generating unit 200 installed in the shell 110, and a first sound guide channel and a second sound guide channel are further arranged inside the shell 110. Sound waves generated by the sound generating unit 200 can propagate from the front cavity to the first opening 111a through the first sound guide channel, and propagate from the rear cavity to the second opening 112a through the second sound guide channel. In the absence of other factors, the sound waves can propagate to the outside of the electronic device through the first opening 111a and the second opening 112a, respectively. The diaphragm of the sound generating unit 200 is arranged in the front cavity, so that the diaphragm of the sound generating unit 200 can prevent water vapor or dust outside the electronic device from entering the sound generating unit 200, and ensure that gas can freely enter the inside of the shell 110 from the first opening 111a, and ensure that sound waves generated by the sound generating unit 200 can be transmitted from the first opening 111a.

[0043] At the same time, the diaphragm assembly 300 is arranged near the second opening 112a of the second sound guide channel, and the diaphragm assembly 300 includes a flexible membrane 310 and an electro-rheological fluid 320. The flexible membrane 310 has air holes and filling cavities that are in communication with each other, the filling cavities are filled with the electro-rheological fluid 320, and the electro-rheological fluid 320 is connected to the power supply device of the electronic device, so that the power supply relationship of the electro-rheological fluid 320 can be controlled according to the mode of the sound generating unit 200 of the electronic device.

[0044] And, in the case that the sound generating unit 200 is in the receiver mode, the current variable fluid 320 is powered on to make the current variable fluid 320 avoid the air vent, so as to ensure that the sound waves generated by the sound generating unit 200 can normally pass through the diaphragm assembly 300 and be transmitted out of the second opening 112a, and the sound waves generated by the sound generating unit 200 and the sound waves generated by the sound generating unit 200 and transmitted out of the first opening 111a meet outside the electronic device, the sound waves generated by the first opening 111a and the second opening 112a are opposite to each other, so that the two sound waves can cancel each other out outside the electronic device, preventing other people or objects outside the user from obtaining the sound information transmitted by the sound generating unit 200, and protecting the privacy of the user.

[0045] And in the case that the sound generating unit 200 is in the non-receiver mode, the current variable fluid 320 is powered off to block the air vent, in which case the sound waves generated by the sound generating unit 200 cannot pass through the diaphragm assembly 300 and be transmitted out of the second opening 112a, and for the first opening 111a, the sound waves generated by the sound generating unit 200 can continue to pass through the diaphragm and be transmitted out of the first opening 111a to the outside of the electronic device, which can ensure that the sound generating unit 200 can normally work in the non-receiver mode such as the loudspeaker mode, and the sound generated can be normally transmitted to the user's ear.

[0046] In the above embodiment, the diaphragm assembly 300 can be fixed on the inner side of the second opening 112a of the shell 110 by bonding or the like, so as to separate the inside of the shell 110 and the second opening 112a by the diaphragm assembly 300. In another embodiment of the present application, the electronic device further comprises a support 120 fixedly connected to the inside of the shell 110, that is, the support 120 is located in the accommodation cavity of the shell 110, in which case the support 120 can provide mounting for the diaphragm assembly 300, and the support 120 and the second opening 112a are spaced apart from each other.

[0047] Specifically, the support 120 has an avoidance cavity 121, and the second opening 112a communicates with the second sound guide channel through the avoidance cavity 121, so as to ensure that the sound waves generated by the sound generating unit 200 can be transmitted to the second opening 112a through the second sound guide channel and the avoidance cavity 121. At the same time, the diaphragm assembly 300 can be mounted on the support 120 by bonding or the like, and the diaphragm assembly 300 is sealingly connected to the inner wall of the avoidance cavity 121, so that when the diaphragm assembly 300 is not in an electric field, the diaphragm assembly 300 can block the avoidance cavity 121, so that the second opening 112a and the inside of the shell 110 are in a state of mutual isolation, preventing the space inside and outside the shell 110 from being communicated, and further preventing the sound waves generated by the sound generating unit 200 from being transmitted out of the second opening 112a.

[0048] In addition, when the diaphragm assembly 300 is in the electric field and is air-permeable, in order to improve the performance of the diaphragm assembly 300, the diaphragm assembly 300 and the second opening 112a can be spaced apart in the axial direction of the second opening 112a, in which case, the diaphragm assembly 300 can have a relatively large vibration space, preventing the structure in which the second opening 112a is located from interfering with the vibration of the diaphragm assembly 300, thereby improving the sound performance of the diaphragm assembly 300. Of course, when the diaphragm assembly 300 is mounted on the support 120, the side of the diaphragm assembly 300 facing away from the second opening 112a also needs to be provided with a vibration space that meets the requirements, so that the diaphragm assembly 300 can vibrate to the opposite sides of the original position of the diaphragm assembly 300. In addition, the position of the diaphragm assembly 300 in the avoiding cavity 121, or the spacing between the diaphragm assembly 300 and the second opening 112a in the axial direction of the second opening 112a, can be determined according to actual conditions.

[0049] As described above, the electrorheological fluid 320 can be connected to the power supply device through the controller. Specifically, the controller can be located on the mainboard of the electronic device, and the mainboard is connected between the electrorheological fluid 320 and the power supply device, so that the mainboard can control the on-off of the power supply device and the electrorheological fluid 320.

[0050] As for the connection mode between the electrorheological fluid 320 and the power supply device, in an embodiment of the present application, a conductive structure such as metal can be directly inserted into the filling cavity in which the electrorheological fluid 320 is located, so that electricity can be directly connected to the electrorheological fluid 320. Alternatively, the flexible membrane 310 can include a first part and a second part, and the first part and the second part are oppositely arranged along the axial direction of the air-permeable hole on the flexible membrane 310. At the same time, the surface of the first part facing the second part is provided with a first conductive plating layer 331, and the surface of the second part facing the first part is provided with a second conductive plating layer 332. By connecting the first conductive plating layer 331 and the second conductive plating layer 332 to the power supply device of the electronic device, the power supply device can be used to place the electrorheological fluid 320 in an electric field. More specifically, the first conductive plating layer 331 and the second conductive plating layer 332 are respectively in communication with the positive electrode and the negative electrode of the power supply device, so that the electric field can be loaded on the electrorheological fluid 320 when the control is turned on.

[0051] Specifically, the first conductive plating layer 331 and the second conductive plating layer 332 can each be a metal structural member, so as to ensure good electrical conductivity of both while reducing processing costs. The first conductive plating layer 331 can be formed on the surface of the first portion facing the second portion by electroplating or the like, and the second conductive plating layer 332 can be formed on the surface of the second portion facing the first portion. The specific material and thickness of the first conductive plating layer 331 and the second conductive plating layer 332 can be selected according to actual conditions, and are not limited herein.

[0052] Based on the above embodiment, in the process of arranging the diaphragm assembly 300, the diaphragm assembly 300 can be fixed to the end of the support member 120 away from the second opening 112a. In this case, on the one hand, the installation of the diaphragm assembly 300 is facilitated, and on the other hand, the vibration space of the diaphragm assembly 300 in the axial direction of the second opening 112a is enlarged, and the acoustic performance of the diaphragm assembly 300 is improved. Specifically, the diaphragm assembly 300 can be fixed to the end surface of the support member 120 away from the second opening 112a by adhesion or the like, and the metal wire or the like can be inserted into the flexible membrane body 310 to form a good electrical connection relationship between the first conductive plating layer 331 and the second conductive plating layer 332 and the power supply device.

[0053] To improve the overall structural stability of the diaphragm, the diaphragm assembly 300 can also include a ball top 340, which is a rigid and breathable structural member, and the ball top 340 is fixed in the filling cavity of the flexible membrane body 310. Under the action of the ball top 340, the motion stability of the diaphragm assembly 300 is relatively better, and the motion regularity of the diaphragm assembly 300 is relatively better. More specifically, the ball top 340 can be arranged at the center region of the flexible membrane body 310 in the diaphragm assembly 300, so as to provide support for the center region of the flexible membrane body 310 during diaphragm vibration. In addition, the forming material of the ball top 340 needs to be lightweight, i.e., the ball top 340 is a lightweight structural member, which ensures that the existence of the ball top 340 basically does not hinder the vibration process of the diaphragm assembly 300. The shape and size of the ball top 340 can be determined according to the actual conditions of the flexible membrane body 310, and are not limited herein.

[0054] For the power supply mode of the electrorheological fluid 320, in another embodiment of the present application, the electronic device can include a first conductive plate 410 and a second conductive plate 420, both of which are electrically connected to the power supply device, so that the first conductive plate 410 and the second conductive plate 420 can form a parallel-plate capacitor. In this case, by arranging the diaphragm assembly 300 between the first conductive plate 410 and the second conductive plate 420, the first conductive plate 410 and the second conductive plate 420 can be used to supply power to the diaphragm assembly 300.

[0055] Specifically, the first conductive plate 410 and the second conductive plate 420 are connected with the positive electrode and the negative electrode of the power supply device respectively, and when the first conductive plate 410 and the second conductive plate 420 are both in communication with the power supply device, the current liquid 320 in the diaphragm assembly 300 is in the electric field.

[0056] The first conductive plate 410 and the second conductive plate 420 can be fixed on the support 120 by bonding or the like. In the process of arranging the first conductive plate 410 and the second conductive plate 420, in order to maximize the use of the space of the avoiding cavity 121 in the support 120, the first conductive plate 410 can be fixed on the end of the support 120 away from the second opening 112a, and the second conductive plate 420 and the diaphragm assembly 300 can be both fixed in the avoiding cavity 121. At the same time, in the axial direction of the second opening 112a, the diaphragm assembly 300 is arranged to be spaced apart from the first conductive plate 410 and the second conductive plate 420. In this case, it can be ensured that the first conductive plate 410 and the second conductive plate 420 will not hinder the normal vibration of the diaphragm assembly 300.

[0057] More specifically, when the diaphragm assembly 300 is in the initial position, the distance between the diaphragm assembly 300 and the first conductive plate 410 can be equal to or substantially equal to the distance between the diaphragm assembly 300 and the second conductive plate 420. In addition, the edges of the first conductive plate 410 and the second conductive plate 420 can be both arranged to have a gap with the inner wall of the avoiding cavity 121 of the support 120, so as to ensure that the gas can pass through the second opening 112a and enter the inside of the shell 110 through the avoiding cavity 121, and ensure that when the diaphragm assembly 300 is in the gas permeable state, the sound waves generated by the sound generating unit 200 can be transmitted from the second opening 112a to the outside of the electronic device through the avoiding cavity 121.

[0058] In another embodiment of the present application, in order to reduce the propagation difficulty of sound waves and gas, the first conductive plate 410 and the second conductive plate 420 can be both provided with a gas passage hole 411, which makes the sound waves and the gas propagate along a relatively straight propagation path, so as to improve the acoustic performance of the diaphragm assembly 300, and there is no need to arrange a gap at the edge of the first conductive plate 410 and the second conductive plate 420, which can improve the connection reliability between the first conductive plate 410 and the second conductive plate 420 and the support 120. Specifically, one gas passage hole 411 can be arranged on the first conductive plate 410 and the second conductive plate 420. In order to balance the uniformity and reliability of the electric field and the smoothness of the gas flow of the diaphragm assembly 300, a plurality of relatively small gas passage holes 411 can be arranged on the first conductive plate 410 and the second conductive plate 420, and the plurality of gas passage holes 411 can be arranged in a matrix.

[0059] In the electronic device disclosed in the above embodiment, the ball top 340 can be arranged in the diaphragm assembly 300 to improve the action stability of the diaphragm assembly 300. In the case where the outer edge of the diaphragm assembly 300 forms a reliable connection relationship with the inner wall of the avoiding cavity 121, the ball top 340 can also not be arranged in the diaphragm assembly 300 to reduce the processing difficulty of the diaphragm assembly 300 and save costs.

[0060] As described above, the first opening 111a and the second opening 112a can be located on opposite sides of the shell 110, that is, one of the first opening 111a and the second opening 112a serves as a sound outlet hole facing the user when the electronic device is in a call state. Optionally, the shell 110 includes a front shell 111 and a rear shell 112, and the first opening 111a is located on the front shell 111 of the electronic device. Thus, in most scenarios during the operation of the electronic device, the driving circuit does not need to be connected with the current variable fluid 320, which saves the energy consumption of the electronic device and reduces the control difficulty of the electronic device.

[0061] Based on the above embodiment, the second opening 112a can be arranged on the rear shell 112 of the shell 110. In another embodiment of the present application, the shell 110 is provided with a lens mounting hole, which can communicate the inside and outside of the shell 110. The lens of the electronic device can be mounted at the lens mounting hole, and the cable of the lens can pass through the lens mounting hole to connect with the power supply device and the main board arranged in the shell 110. At the same time, the electronic device can further include a lens protection ring 130, which can provide protection for the lens. The lens protection ring 130 is embedded in the lens mounting hole of the shell 110, and the outer sidewall of the lens protection ring 130 has a sound guide gap 131. The second opening 112a is communicated with the sound guide gap 131 through a third sound guide channel 110a, so that the sound wave can be transmitted from the second opening 112a to the outside of the electronic device through the sound guide gap 131. The sound guide gap 131 can be invisible to a certain extent, reducing the existence of the sound guide gap 131 for transmitting sound waves to the outside of the electronic device, and improving the appearance performance of the electronic device.

[0062] In addition, whether the third sound guide channel 110a needs to be arranged for the sound guide gap 131 can be determined according to the position of the lens protection ring 130 in the electronic device. If the lens and the first opening 111a are both arranged centrally relative to the shell 110, the third sound guide channel 110a does not need to be arranged additionally for the sound guide gap 131. If the lens is arranged on one side of the shell 110, that is, the lens is offset relative to the shell 110, the third sound guide channel 110a needs to be arranged on the shell 110 for the region where the sound generating unit 200 and the sound guide gap 131 are located. The specific structure of the third sound guide channel 110a can be determined flexibly according to the actual situation of the specific positions of the sound generating unit 200 and the lens protection ring 130, and it is ensured that the sound wave generated by the sound generating unit 200 can propagate along the third sound guide channel 110a and finally be transmitted out of the electronic device from the sound guide gap 131.

[0063] To further improve the dustproof performance of the electronic device, optionally, a dust screen is arranged between the second opening 112a and the diaphragm assembly 300. The dust screen can be fixed to the side wall of the second sound guide channel of the shell 110 by means of adhesion and is located close to the second opening 112a. Thus, the dust screen intercepts dust and other impurities, thereby improving the reliability and service life of the electronic device.

[0064] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or devices that comprise a list of elements do not include only those elements recited, but also other elements not expressly listed or inherent to such processes, methods, articles, or devices. Without more limitations, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0065] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-described specific embodiments, which are only illustrative and not limiting. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope of protection of the claims.

Claims

1. An electronic device, comprising: The electronic device comprises: a shell and a first opening and a second opening on the surface of the shell; a sound generating unit arranged in the shell, and the shell has a first sound guide channel and a second sound guide channel inside, the first sound guide channel is communicated with a front cavity of the sound generating unit and the first opening, and the second sound guide channel is communicated with a rear cavity of the sound generating unit and the second opening; a diaphragm assembly arranged at the second sound guide channel close to the second opening, wherein the diaphragm assembly comprises a flexible membrane and an electrorheological fluid, the flexible membrane is fixedly connected with the shell, the flexible membrane has a gas permeable hole and a filling cavity which are communicated with each other, and the electrorheological fluid is filled in the filling cavity; in the case that the sound generating unit is in a receiver mode, the electrorheological fluid avoids the gas permeable hole, so that the sound wave emitted by the sound generating unit is transmitted out through the diaphragm assembly; in the case that the sound generating unit is in a non-receiver mode, the electrorheological fluid blocks the gas permeable hole, so that the space inside the electronic device is isolated from the second opening or the first opening away from the diaphragm of the sound generating unit.

2. The electronic device of claim 1, wherein, The electronic device further comprises a support fixed to the inside of the shell, and the support has an avoiding cavity, the second opening is communicated with the second sound guide channel through the avoiding cavity, the diaphragm assembly is sealingly connected to the inner wall of the avoiding cavity, and in the axial direction of the second opening, the diaphragm assembly is spaced apart from the second opening.

3. The electronic device of claim 2, wherein, The flexible membrane comprises a first part and a second part arranged opposite along the axial direction of the gas permeable hole, the first part is provided with a first conductive plating layer on the surface facing the second part, the second part is provided with a second conductive plating layer on the surface facing the first part, and the first conductive plating layer and the second conductive plating layer are connected with the power supply device of the electronic device.

4. The electronic device of claim 3, wherein, The diaphragm assembly is fixed to the end of the support away from the second opening.

5. The electronic device of claim 3, wherein, The diaphragm assembly comprises a spherical top which is a rigid gas permeable structure, and the spherical top is fixed in the filling cavity of the flexible membrane.

6. The electronic device of claim 2, wherein, The electronic device further comprises a first conductive plate and a second conductive plate, both of which are electrically connected with the power supply device of the electronic device, and the diaphragm assembly is located between the first conductive plate and the second conductive plate. The first conductive plate is fixed to the end of the support away from the second opening, the second conductive plate and the diaphragm assembly are both fixed in the avoiding cavity, and in the axial direction of the second opening, the diaphragm assembly is spaced apart from the first conductive plate and the second conductive plate.

7. The electronic device of claim 6, wherein, Both the first conductive plate and the second conductive plate are provided with a vent hole.

8. The electronic device of claim 1, wherein, The electronic device further comprises a lens protection ring, the shell is further provided with a third sound guide channel and a lens mounting hole, the lens mounting hole is communicated with the inside and outside of the shell, the third sound guide channel is arranged in the inside of the shell, the lens protection ring is embedded in the lens mounting hole, the outer side wall of the lens protection ring is provided with a sound guide notch, and the second opening is communicated with the sound guide notch through the third sound guide channel.

9. The electronic device of claim 1, wherein, A dust screen is arranged between the second opening and the diaphragm assembly.

10. The electronic device of claim 1, wherein, The first opening and the second opening are arranged opposite to each other on the shell.

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