Electronic equipment

Abstract

The embodiment of the invention provides electronic equipment which comprises a frame body, a circuit board and a flexible rear cover, the flexible rear cover is connected to the frame body, and the circuit board is located between the frame body and the flexible rear cover; wherein a liquid storage cavity is formed in the frame body, the liquid storage cavity is used for storing magnetic liquid, and the magnetic liquid comprises magnetic particles; a circulation hole and a coil assembly are arranged on the circuit board, the circulation hole is communicated with the liquid storage cavity and extends to the flexible rear cover, and by controlling the power-on state of the coil assembly, the magnetic particles can be driven to be gathered towards the flexible rear cover, or the magnetic particles gathered at the flexible rear cover are driven to move towards the liquid storage cavity; the flexible rear cover is made to be switched between the protruding state and the flat state, and in the protruding state, tactile protruding points are formed on the flexible rear cover to display tactile information. The flexible rear cover provided by the embodiment of the invention can form the touch salient points to display the braille information, so that the touch experience of a user is improved, and the functions of the rear cover of the electronic equipment are enriched.

Description

Technical Field

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

[0002] With the development of electronic equipment technology, electronic equipment is increasingly used in users' production and life. As an important component of electronic equipment, the back cover is mainly used to provide protection for the internal structure of the electronic equipment. However, the conventional back cover has a relatively single function, which limits the further improvement of the functionality of the electronic equipment. Summary of the invention

[0003] The present application aims to provide an electronic device to solve the problem that the conventional back cover has a relatively single function.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] The present application discloses an electronic device, which comprises: a frame, a circuit board and a flexible back cover, wherein the flexible back cover is connected to the frame, and the circuit board is located between the frame and the flexible back cover; wherein:

[0006] A liquid storage cavity is provided in the frame, and the liquid storage cavity is used to store magnetic liquid, and the magnetic liquid includes magnetic particles;

[0007] The circuit board is provided with a circulation hole and a coil assembly, wherein the circulation hole is connected with the liquid storage chamber and extends to the flexible back cover. By controlling the power-on state of the coil assembly, the magnetic particles can be driven to gather toward the flexible back cover, or the magnetic particles gathered at the flexible back cover can be driven to move toward the liquid storage chamber, so that the flexible back cover can be switched between a raised state and a flat state. In the raised state, tactile bumps are formed on the flexible back cover to display tactile information.

[0008] In the embodiment of the present application, since the circuit board is provided with a flow hole and a coil assembly, the flow hole is connected to the liquid storage cavity and extends to the flexible back cover, so that the magnetic particles in the liquid storage cavity can flow between the flexible back cover and the liquid storage cavity; by controlling the power-on state of the coil assembly, the magnetic particles can be driven to move, wherein, when the magnetic particles gather toward the flexible back cover, the flexible back cover switches to a raised state, at this time, tactile bumps are formed on the flexible back cover to display Braille information, so that when the user touches the flexible back cover, the user can feel the tactile bumps formed on the flexible back cover and read the Braille information, thereby enhancing the user's tactile experience and enriching the function of the back cover of the electronic device.

[0009] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0011] Figure 1 is a partial cross-sectional view of a flexible rear cover in a flat state in one embodiment of the present application;

[0012] Figure 2 is a partial cross-sectional view of a flexible rear cover in a convex state in one embodiment of the present application;

[0013] Figure 3 is a partial cross-sectional view of a flexible rear cover in another embodiment of the present application in a flat state;

[0014] Figure 4 It is a schematic diagram of the separator absorbing the battery expansion in the embodiment of the present application;

[0015] Figure 5 This is a schematic diagram of the partition structure in the embodiment of the present application;

[0016] Figure 6 is a schematic diagram of the structure of an electronic device in which the flexible rear cover is in a raised state in an embodiment of the present application;

[0017] Figure 7 is a schematic diagram of the structure of an electronic device in which the flexible rear cover is in a flat state in an embodiment of the present application;

[0018] Figure 8 It is one of the exploded schematic diagrams of the electronic device in the embodiment of the present application;

[0019] Fig. 9 This is the second explosion diagram of the electronic device in the embodiment of the present application.

[0020] Figure markings: 10-flexible back cover, 11-tactile bumps, 12-main body, 13-deformation part, 14-first adhesive layer, 20-circuit board, 21-circuit hole, 22-coil assembly, 221-coil group, 2211-driving coil, 201-first surface, 202-second surface, 30-frame, 40-liquid storage chamber, 41-partition, 411-rigid part, 412-flexible part, 42-middle layer board, 43-second adhesive layer, 50-magnetic liquid, 51-magnetic particles, 52-base carrier liquid, 60-buoyancy structure, 61-housing, 62-buoyancy medium, 70-battery, 80-display assembly, 90-internal devices, 91-main board, 911-connection contacts. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0022] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] With the development of electronic equipment technology, electronic equipment is increasingly used in users' production and life. As an important component of electronic equipment, the back cover is mainly used to provide protection for the internal structure of electronic equipment, but the conventional back cover has a relatively simple function, which limits the further improvement of the functionality of electronic equipment. In addition, the development of various electronic devices in vision and hearing has reached a high level, but the development of information transmission function in touch is relatively low, which limits the user's tactile experience when using electronic equipment.

[0026] Based on the above reasons, the present application discloses an electronic device, which designs the back cover of the electronic device based on the physical properties of magnetic fluid, so that it has a tactile display function, enriching the functionality of the back cover. On the one hand, the electronic device provided by the embodiment of the present application can bring a richer and more realistic tactile experience to ordinary users, making the interaction between the electronic device and the user more vivid and interesting, and improving the user's experience of using the electronic device; on the other hand, for the visually impaired, the present application can provide a more convenient screen content reading experience by realizing Braille information display on the back cover, and the electronic device provided by the present application maintains the similarity with the traditional electronic device in appearance, effectively avoiding the obstacles to user acceptance caused by differences in product form, and reducing the psychological burden of the visually impaired.

[0027] The electronic device provided in the embodiment of the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Reference Figure 1 , Figure 2 , respectively showing partial cross-sectional views of an electronic device in an embodiment of the present application when the flexible back cover 10 is in a flat state and a convex state, referring to Figure 8 , Fig. 9 , respectively show the exploded schematic diagrams of the electronic device in the embodiment of the present application. As shown in the figure, the electronic device in the embodiment of the present application may include: a frame 30, a circuit board 20 and a flexible back cover 10, the flexible back cover 10 is connected to the frame 30, the circuit board 20 is located between the frame 30 and the flexible back cover 10, and when the user uses the electronic device, the user's hand can touch the flexible back cover 10.

[0029] The frame 30 is provided with a liquid storage chamber 40, which is used to store a magnetic liquid 50. The magnetic liquid 50 includes magnetic particles 51. The magnetic liquid 50 combines the fluidity of the liquid and the magnetism of the solid magnetic material. The magnetic liquid 50 is stored in the liquid storage chamber 40, which can provide a sufficient source of magnetic particles 51 for the flexible back cover 10 to switch to the convex state. Since the magnetic liquid 50 contains magnetic particles 51, the magnetic particles 51 in the magnetic liquid 50 can exhibit magnetism under the condition of an external magnetic field. This characteristic allows the magnetic fluid to be acted upon by a force in the magnetic field, thereby realizing various magnetic control functions.

[0030] A circulation hole 21 and a coil assembly 22 are provided on the circuit board 20. The circulation hole 21 is connected with the liquid storage chamber 40 and extends to the flexible back cover 10. Since the circulation hole 21 is connected with the liquid storage chamber 40, the magnetic liquid 50 stored in the liquid storage chamber 40 can flow into the circulation hole 21. Since the circulation hole 21 also extends to the flexible back cover 10, the magnetic liquid 50 can flow to the flexible back cover 10 through the circulation hole 21.

[0031] By controlling the power-on state of the coil assembly 22, the magnetic particles 51 can be driven to gather toward the flexible back cover 10, or the magnetic particles 51 gathered at the flexible back cover 10 can be driven to move toward the liquid storage chamber 40, so that the flexible back cover 10 can switch between a raised state and a flat state. In the raised state, tactile bumps 11 are formed on the flexible back cover 10 to display tactile information.

[0032] Specifically, the circuit board 20 can be connected to the mainboard 91 of the electronic device through the connection contact 911, so as to supply power to the coil assembly 22. When the coil assembly 22 is powered on, it can generate a magnetic field. According to the characteristics of the magnetic liquid 50, the magnetic particles 51 therein are magnetized and move under the action of the magnetic field. Among them, the coil assembly 22 can be arranged near the flexible back cover 10. When the coil assembly 22 arranged near the flexible back cover 10 is powered on, a magnetic field is generated near the flexible back cover 10, so that the magnetic particles 51 in the liquid storage chamber 40 are gathered toward the flexible back cover 10 under the action of the magnetic force. At this time, the density of the magnetic particles 51 near the flexible back cover 10 increases, thereby generating a certain pressure on the flexible back cover 10, and the flexible back cover 10 bulges away from the magnetic particles 51 under the action of the pressure, that is, a tactile bump 11 is formed. By disconnecting the power supply to the coil assembly 22 disposed near the flexible back cover 10, the magnetic field near the flexible back cover 10 can be eliminated. At this time, the magnetic particles 51 can also return to the liquid storage layer under the tension of the flexible back cover 10, so that the flexible back cover 10 switches to a flat state. In addition, a coil assembly 22 can also be disposed near the liquid storage chamber 40. When the coil assembly 22 disposed near the liquid storage chamber 40 is energized, a magnetic field is generated near the liquid storage chamber 40, so that the magnetic particles 51 gathered near the flexible back cover 10 are moved toward the liquid storage chamber 40 by the magnetic force, and the flexible back cover 10 returns to a flat state. In this way, by disposing the coil assembly 22 near the liquid storage chamber 40 and energizing to generate a magnetic field, the magnetic particles 51 can be actively attracted to move toward the liquid storage chamber 40, the response speed of the magnetic particles 51 is faster, and the switching speed of the flexible back cover 10 between the convex state and the flat state is also faster.

[0033] Among them, the number of circulation holes 21 is multiple, and the arrangement can be designed as needed. Through the arrangement design of the circulation holes 21, multiple tactile protrusions 11 can be formed on the flexible back cover 10. By controlling the power-on state of the coil assembly 22 at different positions of the circulation holes 21, the flexible back cover 10 can have different states at different positions. For example, one part of the area is in a raised state, and the other part of the area is in a flat state, so that the flexible back cover 10 can display Braille information. It can be understood that the number of circulation holes 21 is related to the maximum number of tactile protrusions 11 that can be formed by the flexible back cover 10, and the density of the circulation holes 21 determines the resolution of the tactile display of the flexible back cover 10. In practical applications, the tactile display resolution can be designed according to the performance requirements of the electronic equipment, and the number and density of the circulation holes 21 can be designed accordingly.

[0034] In practical applications, the drive coil 2211 can be formed by etching on the circuit board 20. In this way, the arrangement of the drive coil 2211 on the circuit board 20 can be completed without additional components, making the overall layout of the circuit board 20 more compact. In addition, the drive coil 2211 can be formed by etching on the circuit board 20 to simplify the manufacturing process and reduce the complexity and cost of the assembly process, which also helps to improve production efficiency and reduce manufacturing costs. In practical applications, the drive coil 2211 can be electrically connected to the electromagnetic control circuit through the wiring between the circuit board 20, so as to power the drive coil 2211.

[0035] The magnetic liquid 50 generally includes a base carrier liquid 52 and a surfactant. The base carrier liquid 52 can provide fluidity for the magnetic particles 51. By adjusting the base carrier liquid 52, the viscosity, thermal conductivity, density, etc. of the magnetic liquid 50 can also be changed; the surfactant is used to coat the surface of the magnetic particles 51 to prevent them from agglomerating and ensure that the magnetic particles 51 are evenly dispersed in the base carrier liquid 52. In practical applications, the magnetic particles 51 can be selected from materials with magnetic responsiveness and electrical insulation to ensure that they can quickly respond to changes in the magnetic field and do not affect the signal transmission of electronic equipment. For example, the magnetic particles 51 can be ferrite materials such as Fe2O3 or Fe3O4; the base carrier liquid 52 can be water, oil, organic solvents, etc.

[0036] According to the electronic device provided by the embodiment of the present application, since the circuit board 20 is provided with a circulation hole 21 and a coil assembly 22, the circulation hole 21 is connected to the liquid storage chamber 40 and extends to the flexible back cover 10, so that the magnetic particles 51 in the liquid storage chamber 40 can flow between the flexible back cover 10 and the liquid storage chamber 40; the coil assembly 22 can drive the magnetic particles 51 to move when powered on, wherein when the magnetic particles 51 gather toward the flexible back cover 10, the flexible back cover 10 switches to a raised state, at which time, tactile bumps 11 are formed on the flexible back cover 10 to display Braille information, so that when the user touches the flexible back cover 10, the user can feel the tactile bumps 11 formed on the flexible back cover 10 and read the Braille information, thereby enhancing the user's tactile experience and enriching the function of the back cover of the electronic device.

[0037] It should be noted that, in one embodiment of the present application, Fig. 9 As shown, the flexible back cover 10, the circuit board 20 and the liquid storage chamber 40 constitute the back cover assembly of the electronic device, wherein the back cover assembly includes an information output layer, an electromagnetic layer and a liquid storage layer connected in sequence. Specifically, the flexible back cover 10 is an information output layer that can be deformed and serves as an output tactile bump 11, the circuit board 20 and the coil assembly 22 arranged thereon form an electromagnetic layer and are used to energize to generate a magnetic field, the liquid storage chamber 40 is formed by enclosing a middle plate 42, a partition 41 and a second adhesive layer 43, the middle plate 42 is also connected to the circuit board 20 through the second adhesive layer 43, and the magnetic liquid 50 is stored in the liquid storage chamber 40 to form a liquid storage layer. In practical applications, the above structure can be pre-assembled as a back cover assembly, and then assembled with the frame 30, the display assembly 80, the battery 70 and other components of the electronic device.

[0038] In another embodiment of the present application, Figure 3 As shown, the electronic device also includes a display screen assembly 80, which is enclosed with the flexible back cover 10 and the frame 30 to form a receiving cavity. The magnetic liquid 50 is filled in the receiving cavity, and the receiving cavity forms a liquid storage cavity 40, which simplifies the tactile display structure and improves the integration of the electronic device.

[0039] Specifically, the electronic device includes a display assembly 80, a flexible back cover 10, a frame 30, internal devices 90 such as a mainboard 91, a battery 70, a camera module, etc. The display assembly 80, the flexible back cover 10, and the frame 30 enclose a closed receiving cavity, and the magnetic liquid 50 is directly filled in the receiving cavity, and there is no need to set up a separate physical structure to form the liquid storage cavity 40, thereby simplifying the structural design of the electronic device. It should be noted that a sealant needs to be set between the components used to enclose the liquid storage cavity 40 to ensure the sealing of the electronic device.

[0040] Optionally, the carrier liquid in the magnetic liquid 50 is a non-conductive coolant, so as to significantly improve the heat dissipation capacity of the electronic device while realizing the tactile information display function of the electronic device.

[0041] Since the liquid storage chamber 40 is directly enclosed by the flexible back cover 10, the frame 30, the display screen assembly 80 and other structures, the volume of the liquid storage chamber 40 is relatively large, and it can be in direct contact with the display screen assembly 80 and the internal components 90 such as the battery 70. When the carrier liquid is set as a coolant, the heat dissipation performance of the electronic device can be greatly improved, and the user experience can be optimized. Among them, since the internal structure of the electronic device is complex and a variety of components are provided, in order to prevent the components from short-circuiting, the carrier liquid also needs to have insulating properties. Specifically, the non-conductive coolant can be selected from materials with high heat dissipation capacity and low dielectric constant, such as fluorinated hydrocarbons or hydrofluoroethers, to ensure that it has efficient heat dissipation performance during the operation of the mobile phone.

[0042] like Figure 1 , Figure 2 As shown, the flexible back cover 10 includes a main body 12, on which a deformation portion 13 is provided, the deformation portion 13 is arranged opposite to the flow hole 21, and the magnetic particles 51 gather toward the deformation portion 13 to form a tactile bump 11. When a user uses an electronic device, the tactile bump 11 can be touched to enhance the tactile experience of the electronic device. At the same time, the tactile bump 11 can display Braille information and is suitable for visually impaired people, thereby enriching the functionality of the back cover of the electronic device.

[0043] Specifically, in some optional embodiments of the present application, the body 12 is connected to the circuit board 20 through the first adhesive layer 14. When the body 12 is connected to the circuit board 20, since the deformation portion 13 is arranged opposite to the flow hole 21, when the magnetic particles 51 gather toward the deformation portion 13, the deformation portion 13 can bulge in a direction away from the flow hole 21. And each flow hole 21 is connected to the body 12 around, so as to ensure that the deformation portion 13 arranged opposite to each flow hole 21 can be deformed independently, so as to ensure the accuracy of the formation of the tactile bump 11.

[0044] In some other optional embodiments of the present application, the deformation portion 13 is made of a flexible material and is easily deformed when subjected to force, while the portion of the main body 12 other than the deformation portion 13 is more rigid and is not easily deformed when subjected to force. At this time, the main body 12 may not be connected to the circuit board 20. In this case, even if the magnetic particles 51 gather toward the flexible back cover 10, it is not easy to cause deformation of the main body 12, while the deformation portion 13 made of flexible material can be deformed under the force of the aggregation of the magnetic particles 51.

[0045] In some further optional embodiments of the present application, the deformation portion 13 may also be made of electrodeformable material. In this case, the deformation portion 13 may be electrically connected to the circuit board 20 to control the deformation of the deformation portion 13 by controlling the power-on state of the deformation portion 13 so as to form a tactile bump 11.

[0046] In practical applications, the flexible back cover 10 plays a role in presenting the appearance texture of the electronic device and outputting tactile information. In a flat state, the smooth appearance ensures the feel of the device. When the coil assembly 22 is energized and outputs tactile information, the deformation portion 13 can protrude from the surface of the back cover to form a tactile signal that can be perceived by the user. When the design of the deformation portion 13 meets the Braille character specifications, it can also provide the function of Braille information output for the visually impaired, provide care for the visually impaired users, and meet their needs for barrier-free design. In practical applications, the flexible back cover 10 can be made of elastic materials such as silicone and polyurethane (PU) to achieve the deformation function.

[0047] Furthermore, the electronic device also includes a buoyancy structure 60 , which is connected to a side of the deformation portion 13 close to the circuit board 20 . The buoyancy structure 60 is used to increase the buoyancy of the deformation portion 13 , thereby further ensuring the reliability of the display of the tactile bumps 11 .

[0048] It should be noted that, since the deformation part 13 is not connected to the circuit board 20, when the coil assembly 22 is energized to drive the magnetic particles 51 to gather toward the flexible back cover 10, the carrier liquid in the magnetic liquid 50, as a flowing medium, will move toward the direction of the flexible back cover 10 together with the magnetic particles 51. At this time, the deformation part 13 of the flexible back cover 10 will actually be subject to the buoyancy from the magnetic liquid 50 and bulge outward. In this process, since the side of the deformation part 13 close to the circuit board 20 is also provided with a buoyancy structure 60, the buoyancy of the deformation part 13 is increased. In this way, under the same magnetic field strength, the deformation part 13 is easier to overcome its own material resistance and external environmental factors (such as gravity), thereby improving the switching speed between the flat state and the convex state. In addition, the design of the buoyancy structure 60 also indirectly optimizes energy consumption. Specifically, under the premise of achieving the same tactile feedback effect, the required energization intensity and time of the coil assembly 22 may be reduced, thereby reducing the overall power consumption of the electronic device. In practical applications, the buoyancy structure 60 can select a structure with a lower density such as a foam material.

[0049] Optionally, the buoyancy structure 60 at least partially extends into the flow hole 21 and is spaced apart from the hole wall of the flow hole 21 , and the space is used for passing the magnetic particles 51 to ensure the formation of the tactile bumps 11 .

[0050] Specifically, the shape of the buoyancy structure 60 is adapted to the shape of the circulation hole 21. For example, the tactile protrusion 11 formed on the flexible back cover 10 is circular, so the shape of the circulation hole 21 is also circular. Correspondingly, the buoyancy structure 60 is also a cylindrical structure, wherein a certain interval is designed between the outer wall of the buoyancy structure 60 and the hole wall of the circulation hole 21, and the size of the interval needs to ensure that the magnetic particles 51 can pass normally. This design optimizes the flow path of the magnetic particles 51 in the circulation hole 21, so that the magnetic particles 51 can more smoothly flow from the liquid storage chamber 40 through the circulation hole 21 to the deformation portion 13 of the flexible back cover 10 when driven by the magnetic field generated by the coil assembly 22, or flow back to the liquid storage chamber 40 when needed.

[0051] like Figure 1 , Figure 2 As shown, the buoyancy structure 60 includes an outer shell 61 and a buoyancy medium 62. The outer shell 61 is connected to the deformation portion 13 and has a buoyancy cavity. The buoyancy medium 62 is filled in the buoyancy cavity, wherein the density of the buoyancy medium 62 is less than the density of the magnetic liquid 50 to ensure that the buoyancy structure 60 provides an effect of increasing the buoyancy of the deformation portion 13.

[0052] In practical applications, the buoyancy medium 62 can be a low-density gas, liquid, foam porous structure, etc., and the present application does not specifically limit the type of the buoyancy medium 62. It should be noted that in order to reduce the weight of the buoyancy structure 60 itself, the shell 61 of the buoyancy structure 60 can also be made of a low-density material. Among them, the buoyancy medium 62 is filled in the shell 61 with the buoyancy cavity, and the shell 61 and the buoyancy medium 62 form a relatively closed and stable buoyancy system, which can resist the interference of the external environment to a certain extent, such as temperature changes, vibrations, etc., so as to ensure that the electronic device can still maintain a good tactile feedback effect in a complex use environment.

[0053] In addition, the outer shell 61 of the buoyancy structure 60 and the flexible rear cover 10 may also be an integrally formed structure, so that the integrity between the flexible rear cover 10 and the buoyancy structure 60 is stronger, thereby ensuring the contribution of the buoyancy structure 60 to the buoyancy of the deformation portion 13 .

[0054] Optionally, there are multiple flow holes 21, which are spaced apart on the circuit board 20, and the coil assembly 22 includes multiple coil groups 221, wherein one coil group 221 is arranged around one flow hole 21 to improve the accuracy of forming the tactile display bumps.

[0055] Furthermore, the coil group 221 includes a plurality of driving coils 2211, and the plurality of driving coils 2211 are arranged at intervals along the thickness direction of the circuit board 20. By controlling the power-on state of the plurality of driving coils 2211, the magnetic field formed by the plurality of driving coils 2211 can be controlled, so that the protruding height of the tactile bump 11 and the switching between the protruding state and the flat state can be flexibly designed.

[0056] For example, in the embodiment of the present application, the circuit board 20 includes a first surface 201 and a second surface 202 that are arranged in a direction opposite to each other in the thickness direction, the first surface 201 is close to the flexible back cover 10, and the second surface 202 is close to the liquid storage chamber 40. The coil group 221 includes a first drive coil and a second drive coil, wherein the first drive coil is arranged on the first surface 201, and the second drive coil is arranged on the second surface 202. By arranging the first drive coil and the second drive coil and controlling the power-on state of the first drive coil and the second drive coil respectively, the magnetic particles 51 can be driven to gather toward the flexible back cover 10, or the magnetic particles 51 gathered on the flexible back cover 10 can be driven to move toward the liquid storage chamber 40. Specifically, when the first drive coil is powered on, the magnetic field generated by the first drive coil is closer to the flexible back cover 10. At this time, the magnetic particles 51 gather toward the flexible back cover 10 under the action of the magnetic field generated by the first drive coil. When the first drive coil is powered off and the second drive coil is powered on, the magnetic field generated by the first drive coil disappears, and the magnetic particles 51 gathered at the flexible back cover 10 are no longer attracted by the magnetic field. The second drive coil generates a magnetic field. Therefore, the magnetic particles 51 gathered at the flexible back cover 10 move toward the liquid storage chamber 40 closer to the second drive coil, thereby restoring the flexible back cover 10 to a flat state. Through the above process, the switching of the flexible back cover 10 between a convex state and a flat state is achieved.

[0057] It should be noted that in actual applications, since there are multiple flow holes 21, deformation parts 13 and coil groups 221, the deformation of each deformation part 13 in the flexible back cover 10 can be independently controlled by separately controlling the power-on state of the driving coils 2211 in the multiple coil groups 221, so that a part of the deformation part 13 is in a convex state and another part of the deformation part 13 is in a flat state. In this way, the flexible back cover 10 realizes the output of tactile information through the different convex states between the multiple deformation parts 13.

[0058] The following describes the working process of the electronic device implementing the tactile information output in the embodiment of the present application:

[0059] First, in the information receiving stage, the electronic device receives external information through a wireless communication module (such as 4G, 5G networks), including but not limited to text messages, application notifications, or social media content. The received information is decoded and processed by the processor to prepare for subsequent tactile information conversion and display.

[0060] Secondly, in the information processing stage, the processor converts the decoded information content into Braille code through a specific algorithm. The converted Braille code is further processed into a control signal for controlling the power-on state of the drive coil 2211. The control signal has a preset voltage and current intensity to accurately control the attraction of the drive coil 2211 to the magnetic liquid 50.

[0061] Then, in the information presentation stage, the control signal generated by the processor is transmitted to the circuit board 20 through the control module, and the power-on state of the drive coil 2211 is changed. After the first drive coil is energized, a local magnetic field is formed in the designated area, attracting the magnetic particles 51 in the magnetic liquid 50 to gather in the area; the gathered magnetic particles 51 cause the local effective density of the magnetic liquid 50 to increase, forming a pressure difference with the buoyancy structure 60, and the increased pressure of the local magnetic liquid 50 acts on the flexible back cover 10 and pushes the flexible back cover 10 to expand outward, forming tactile bumps 11 that can be perceived by touch. These tactile bumps 11 are arranged according to the position and shape of the Braille code, such as Figure 6 As shown, the user can identify the corresponding information content by touching.

[0062] Finally, the tactile display is reset. When the Braille information does not need to be displayed, the current of the first drive coil is disconnected, and the second drive coil is energized at the same time. The magnetic field of the second drive coil attracts the magnetic particles 51 gathered at the flexible back cover 10 back to the liquid storage chamber 40, restoring the uniform distribution of the magnetic particles 51. As the density of the magnetic liquid 50 returns to normal, the flexible back cover 10 naturally returns to a flat state under the action of its tension, and there is no tactile bump 11 on the surface, such as Figure 7 shown.

[0063] Furthermore, if Figure 4 , Figure 5 As shown, the electronic device also includes a battery 70 and a partition 41, wherein the partition 41 can be deformed, the partition 41 is arranged in the frame 30 and is used to enclose the circuit board 20 to form a liquid storage chamber 40, and the battery 70 is arranged on the side of the partition 41 away from the circuit board 20. Since the partition 41 can be deformed, the electronic device can provide a storage space for the expansion that may occur when the battery 70 is used for a long time, preventing the battery 70 from expanding and squeezing the back cover and other internal devices 90, thereby improving the safety and reliability of the battery 70.

[0064] In actual applications, the battery 70 undergoes complex chemical reactions during the charge and discharge process, causing the battery 70 to expand in volume and increase in thickness. If this expansion phenomenon is not controlled, it may exert pressure on components such as the display screen and the back cover, causing the components to crack or be damaged. The partition 41 in the present application can form a flexible portion 412 and a rigid portion 411 on the partition 41 using a process combining soft and hard materials such as double-material injection molding, wherein the flexible portion 412 can be deformed. When the battery 70 expands, the rigid portion 411 of the partition 41 can be squeezed, and the squeezed magnetic liquid 50 inside the liquid storage chamber 40 flows to other areas, and the flexible portion 412 undergoes adaptive deformation, thereby providing a space for the expansion of the battery 70, which not only avoids excessive restriction of the expansion of the battery 70, but also avoids squeezing of components, thereby ensuring the safety of the battery 70 and the reliability of the electronic device.

[0065] In summary, the electronic device provided by the embodiments of the present application has at least the following advantages:

[0066] In the embodiment of the present application, since the circuit board is provided with a flow hole and a coil assembly, the flow hole is connected to the liquid storage cavity and extends to the flexible back cover, so that the magnetic particles in the liquid storage cavity can flow between the flexible back cover and the liquid storage cavity; the coil assembly can drive the magnetic particles to move when energized, wherein when the magnetic particles gather toward the flexible back cover, the flexible back cover switches to a raised state, at which time, tactile bumps are formed on the flexible back cover to display tactile information, so that when the user touches the flexible back cover, the user can feel the tactile bumps formed on the flexible back cover and read the Braille information, thereby enhancing the user's tactile experience and enriching the function of the back cover of the electronic device.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electronic device, characterized in that: The electronic device comprises: a frame (30), a circuit board (20) and a flexible back cover (10), wherein the flexible back cover (10) is connected to the frame (30), and the circuit board (20) is located between the frame (30) and the flexible back cover (10); wherein: A liquid storage cavity (40) is provided in the frame (30), and the liquid storage cavity (40) is used to store magnetic liquid (50), and the magnetic liquid (50) includes magnetic particles (51); The circuit board (20) is provided with a circulation hole (21) and a coil assembly (22), wherein the circulation hole (21) is connected to the liquid storage chamber (40) and extends to the flexible back cover (10), and by controlling the power-on state of the coil assembly (22), the magnetic particles (51) can be driven to gather toward the flexible back cover (10), or the magnetic particles (51) gathered at the flexible back cover (10) can be driven to move toward the liquid storage chamber (40), so that the flexible back cover (10) switches between a raised state and a flat state, and in the raised state, tactile bumps (11) are formed on the flexible back cover (10) to display tactile information.

2. The electronic device according to claim 1, characterized in that: The flexible back cover (10) comprises a body (12), a deformation portion (13) is provided on the body (12), the deformation portion (13) is arranged opposite to the flow hole (21), and the magnetic particles (51) gather toward the deformation portion (13) to form the tactile protrusion (11).

3. The electronic device according to claim 2, characterized in that: The electronic device further comprises a buoyancy structure (60), wherein the buoyancy structure (60) is connected to a side of the deformation portion (13) close to the circuit board (20), and the buoyancy structure (60) is used to increase the buoyancy exerted on the deformation portion (13).

4. The electronic device according to claim 3, characterized in that: The buoyancy structure (60) at least partially extends into the flow hole (21) and is spaced apart from the hole wall of the flow hole (21), and the space is used for passing the magnetic particles (51).

5. The electronic device according to claim 3, characterized in that: The buoyancy structure (60) comprises an outer shell (61) and a buoyancy medium (62), wherein the outer shell (61) is connected to the deformation portion (13) and has a buoyancy cavity, and the buoyancy medium (62) is filled in the buoyancy cavity, wherein the density of the buoyancy medium (62) is less than the density of the magnetic liquid (50).

6. The electronic device according to claim 1, characterized in that: The number of the circulation holes (21) is multiple, and the multiple circulation holes (21) are arranged at intervals on the circuit board (20). The coil component (22) includes multiple coil groups (221), wherein one coil group (221) is arranged around one circulation hole (21).

7. The electronic device according to claim 6, characterized in that: The coil group (221) comprises a plurality of driving coils (2211), and the plurality of driving coils (2211) are arranged at intervals along the thickness direction of the circuit board (20).

8. The electronic device according to claim 1, characterized in that: The electronic device further comprises a battery (70) and a partition (41), wherein the partition (41) is deformable, the partition (41) is arranged in the frame (30) and is used to enclose with the circuit board (20) to form the liquid storage chamber (40), and the battery (70) is arranged on a side of the partition (41) away from the circuit board (20).

9. The electronic device according to claim 1, characterized in that: The electronic device further comprises a display screen assembly (80), wherein the display screen assembly (80) and the frame (30) are combined to form a receiving cavity, the magnetic liquid (50) is filled in the receiving cavity, and the receiving cavity forms the liquid storage cavity (40).

10. The electronic device according to claim 9, characterized in that: The magnetic liquid (50) further comprises a carrier liquid, wherein the carrier liquid is a non-conductive cooling liquid.

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