Electronic equipment, assembling method of electronic equipment and screen assembly

Abstract

The invention provides electronic equipment, an assembling method of the electronic equipment and a screen assembly, and relates to the technical field of electronic products, and the electronic equipment comprises a screen, an exciter module, a circuit board and a conductive elastic part. The screen is provided with a display surface and a non-display surface which are arranged back to back, the exciter module comprises an exciter and a flexible circuit board, the exciter is fixed on the non-display surface, and the whole flexible circuit board is fixed on the non-display surface. One end of the flexible circuit board is fixed and electrically connected with the exciter; the circuit board is located on the side, away from the screen, of the exciter module and is fixed relative to the screen. The conductive elastic piece is compressed between the circuit board and the flexible circuit board, the flexible circuit board is electrically connected with the circuit board through the conductive elastic piece, the electronic equipment aims to solve the redundancy problem of the flexible circuit board caused by the BTB traditional connection mode of the exciter and the circuit board in the prior art, the redundancy design of the flexible circuit board can be avoided, the space is saved, and the reliability of the electronic equipment is improved. And the structure is simple, assembling is convenient, and maintainability is high.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to an electronic device, an assembly method of an electronic device, and a screen assembly. Background Art

[0002] With the development of electronic device technology, private calls have gradually become a more urgent need for users to use electronic devices. In order to improve the privacy of users' voice calls, listening to voice messages and other operations when using electronic devices, more and more electronic devices use screen sound technology to transmit sound. Screen sound technology refers to using the screen as a vibrator, and using an exciter fixed on the screen to drive the screen to vibrate to generate sound waves to achieve the purpose of sound.

[0003] In order to realize the driving of the screen by the actuator, the actuator is electrically connected to the circuit board (such as the main board) inside the electronic device through the flexible circuit board. In order to facilitate assembly, the circuit board is usually fixed and electrically connected to the flexible circuit board using a board to board (BTB) connector. Specifically, one of the female and male sockets of the BTB connector is provided on the flexible circuit board, and the other of the female and male sockets of the BTB connector is provided on the circuit board, and the female socket is buckled with the male socket.

[0004] However, in order to prevent the flexible circuit board from breaking due to the pulling of the flexible circuit board when the female socket and the male socket are engaged, the flexible circuit board usually needs to be set to be relatively long to provide a margin for the engagement of the female socket and the male socket. In addition, due to the structural layout inside the electronic device, the routing path of the flexible circuit board inside the electronic device needs to avoid various structures inside the electronic device, causing the flexible circuit board to bend inside the electronic device. Based on the above factors, the redundancy of the flexible circuit board leads to excessive space inside the electronic device, which cannot meet the current user's requirements for thinner electronic devices. In addition, the entire connection structure is relatively complex, difficult to assemble, and not conducive to maintenance.

[0005] As users have higher and higher requirements for thinner electronic devices, the internal structure stacking layout of electronic devices is becoming more and more compact, resulting in limited layout space inside electronic devices. How to optimize the layout of the actuator and circuit board inside the electronic device and the connection between the two within the limited space inside the electronic device to meet the thinning requirements of electronic devices is an important research direction for various manufacturers. Summary of the invention

[0006] The present application provides an electronic device, an assembly method of the electronic device and a screen assembly. The electronic device aims to solve the redundancy problem of the flexible circuit board connected between the exciter and the circuit board in the prior art, which is conducive to realizing the thin design of the electronic device.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, the present application provides an electronic device, comprising: a screen, an exciter module, a circuit board, and a conductive elastic member. The screen has a display surface and a non-display surface disposed opposite to each other, the exciter module comprises an exciter and a flexible circuit board, the exciter is fixed to the non-display surface, and the flexible circuit board is fixed to the non-display surface as a whole. One end of the flexible circuit board is fixed to and electrically connected with the exciter; the circuit board is located on a side of the exciter module away from the screen, and is fixed relative to the screen; the conductive elastic member is compressed between the circuit board and the flexible circuit board, and the flexible circuit board is electrically connected to the circuit board through the conductive elastic member.

[0009] In the electronic device of the present application, since the exciter is fixed to the non-display surface of the screen, the flexible circuit board is fixed to the non-display surface of the screen as a whole. In this way, it is beneficial to fix the exciter module as a whole to the non-display surface of the screen, and it is convenient to assemble the screen and the exciter module as a whole with other structures inside the electronic device, which can simplify the assembly process and reduce the assembly cost. Moreover, the flexible circuit board is fixed to the screen as a whole, which can simplify the routing path of the flexible circuit board, avoid the problem of the long length of the flexible circuit board caused by the need for the flexible circuit board to avoid other structures inside the electronic device during the routing process, which is beneficial to shorten the length of the flexible circuit board, save space inside the electronic device, and help to achieve the thinning of the electronic device. In addition, the conductive elastic member is compressed between the flexible circuit board and the circuit board, so that the flexible circuit board can be electrically connected to the circuit board through the conductive elastic member. This connection method does not need to consider the problem in the prior art that the flexible circuit board needs to be set longer because the BTB connector is used to connect the flexible circuit board to the circuit board to prevent the flexible circuit board from breaking due to pulling the flexible circuit board when the female and male sockets of the BTB connector are engaged. This is conducive to further shortening the length of the flexible circuit board, saving space inside the electronic device, and further realizing the thinning of the electronic device. In addition, this connection method has a reasonable and compact structural layout, is easy to assemble, and reduces the assembly cost.

[0010] In a possible implementation of the first aspect, the exciter may be laminated and fixed on the non-display surface of the screen, so that when the exciter is used in an electronic device, the overall thickness of the exciter and the screen can be reduced.

[0011] In a possible implementation of the first aspect, the surface of the flexible circuit board facing the circuit board has a conductive abutment portion, the conductive elastic member is fixed to the circuit board, and the conductive elastic member abuts against and is electrically connected to the conductive abutment portion. Thus, the structure is simple and easy to assemble.

[0012] In a possible implementation manner of the first aspect, the conductive elastic member is fixed to a surface of the flexible circuit board facing the circuit board, the circuit board has a conductive abutment portion, and the conductive elastic member on the flexible circuit board abuts against the conductive abutment portion on the circuit board.

[0013] In a possible implementation of the first aspect, the surface of the flexible circuit board facing the circuit board and the surface of the circuit board facing the flexible circuit board both have a conductive abutment portion. The conductive elastic member abuts between the conductive abutment portion on the flexible circuit board and the conductive abutment portion on the circuit board, and at this time, the conductive elastic member is detachably connected to the flexible circuit board and the circuit board.

[0014] In a possible implementation of the first aspect, the flexible circuit board includes a second electrical connection section, the second electrical connection section is laminated and fixed to the screen, the orthographic projection of the second electrical connection section on the non-display surface is located at the periphery of the orthographic projection of the exciter on the non-display surface, and the conductive abutment portion is provided on the surface of the second electrical connection section facing the circuit board. In this way, when the conductive abutment portion abuts and cooperates with the conductive elastic member, the vibration of the exciter will not be affected, which is conducive to improving the reliability of the operation of the exciter.

[0015] In a possible implementation of the first aspect, the flexible circuit board further includes a first electrical connection section and a third electrical connection section, the exciter and the screen are stacked, the first electrical connection section is stacked and fixed on a side surface of the exciter away from the screen, the third electrical connection section is connected between the outer peripheral edge of the first electrical connection section and the outer peripheral edge of the second electrical connection section, and the third electrical connection section is located on the side to which the outer peripheral surface of the exciter faces. Thus, not only the electrical connection between the flexible circuit board and the exciter is achieved, but also the structure is simple and easy to assemble, and the entire exciter module tends to be flattened, which is conducive to realizing a thin design of the electronic device.

[0016] In a possible implementation of the first aspect, the actuator module further includes a reinforcing sheet, which is laminated and fixed between the second electrical connection section and the screen, thereby preventing the conductive elastic member from piercing the screen during assembly or when the screen is impacted.

[0017] Since the reinforcing sheet can be used to resist part of the impact force acting on the screen when the display surface of the screen is impacted, the structural strength of the reinforcing sheet determines the protective effect of the reinforcing sheet. On this basis, in some embodiments, in order to ensure the structural strength of the reinforcing sheet, the thickness of the reinforcing sheet can be increased, but this will increase the space occupied by the reinforcing sheet and increase the thickness of the electronic device. In order to avoid this problem, a material with greater rigidity can be selected to make the reinforcing sheet to take into account both structural strength and thickness. In some embodiments, the reinforcing sheet can be a metal part. Exemplarily, the reinforcing sheet can be a stainless steel part, an aluminum alloy part, a magnesium-aluminum alloy part, etc. Of course, the present application is not limited to this. In other embodiments, the reinforcing sheet can also be a plastic part, a glass fiber material part, etc.

[0018] In some embodiments, the thickness of the reinforcing sheet is greater than or equal to 0.1 mm and less than or equal to 1 mm. In this way, the space occupied by the reinforcing sheet in the thickness direction of the electronic device can be reduced while ensuring the structural strength of the reinforcing sheet, which is conducive to realizing a lightweight design of the electronic device.

[0019] In a possible implementation of the first aspect, the exciter module further includes a reinforcing gasket, which is located at the periphery of the reinforcing gasket and connected to the reinforcing gasket, and the reinforcing gasket is stacked and fixed between the exciter and the non-display surface. The exciter is connected to the screen with the help of the reinforcing gasket. When the exciter vibrates, the reinforcing gasket can be driven to vibrate, thereby driving the screen to vibrate. In this way, on the one hand, the exciter and the screen can be separated by the reinforcing gasket, and when the screen is impacted, the impact force acting on the display surface of the screen can be prevented from being directly transmitted to the exciter, thereby reducing the stress on the exciter and avoiding damage to the exciter; on the other hand, after the reinforcing gasket is set, it is also beneficial to improve the structural strength of the exciter and improve the ability of the exciter to resist stress. Therefore, the protection of the exciter can be achieved by the reinforcing gasket, which is beneficial to improve the reliability of the exciter. In addition, the connection between the reinforcing sheet and the reinforcing gasket can enable the reinforcing sheet and the reinforcing gasket to be connected to the screen as a whole, which is beneficial to improving the assembly effect, and the overall structural strength of the reinforcing sheet and the reinforcing gasket after being connected together is higher, and the reinforcement effect is better. Furthermore, after the reinforcing sheet and the reinforcing gasket are connected together, the third connecting section can be easily reinforced at the connection between the reinforcing sheet and the reinforcing gasket, which can achieve a good reinforcement effect for the flexible circuit board.

[0020] Exemplarily, the reinforcing gasket may be connected to the non-display surface via a first adhesive layer, and the reinforcing gasket may be connected to the actuator via a second adhesive layer.

[0021] Since the reinforcing gasket can be used to resist part of the impact force acting on the screen when the display surface of the screen is impacted, the structural strength of the reinforcing gasket determines the protective effect of the reinforcing gasket. On this basis, in some embodiments, in order to ensure the structural strength of the reinforcing gasket, the thickness of the reinforcing gasket can be increased, but this will increase the space occupied by the reinforcing gasket and increase the thickness of the electronic device. In order to avoid this problem, a material with greater rigidity can be selected to make the reinforcing gasket to take into account both structural strength and thickness. In some embodiments, the reinforcing gasket can be a metal part. Exemplarily, the reinforcing gasket can be a stainless steel part, an aluminum alloy part, a magnesium-aluminum alloy part, etc.

[0022] In some embodiments, the thickness of the reinforcing gasket is greater than or equal to 0.1 mm and less than or equal to 1 mm. In this way, the space occupied by the reinforcing gasket in the thickness direction of the electronic device can be reduced while ensuring the structural strength of the reinforcing gasket, which is conducive to realizing the lightweight design of the electronic device.

[0023] In a possible implementation of the first aspect, in order to improve the connection strength between the reinforcing sheet and the reinforcing gasket, simplify their processing technology, and reduce manufacturing costs, the reinforcing gasket and the reinforcing sheet are an integrally formed part. Exemplarily, when the reinforcing sheet and the reinforcing gasket are both metal, for example, the reinforcing sheet and the reinforcing gasket can be processed by a stamping process, and the reinforcing sheet and the reinforcing gasket can also be processed by a metal powder injection molding (MIM) process. Another exemplary embodiment, when the reinforcing sheet and the reinforcing gasket are plastic, the reinforcing sheet and the reinforcing gasket can be processed by an injection molding process.

[0024] In a possible implementation of the first aspect, the reinforcing gasket is connected to the reinforcing sheet to form a reinforcing bottom sheet, and the orthographic projection of the flexible circuit board on the non-display surface is located within the orthographic projection of the reinforcing bottom sheet on the non-display surface. This can prevent the circumferential dimension of the flexible circuit board from being too large and occupying space inside the electronic device, and can also improve the reliability of the reinforcement of the flexible circuit board by the reinforcing bottom plate.

[0025] Exemplarily, in order to prevent the circumferential dimension of the flexible circuit board from being too large and occupying space inside the electronic device, the orthographic projection of the first electrical connection section on the non-display surface is located within the outer contour of the orthographic projection of the actuator on the non-display surface.

[0026] In a possible implementation of the first aspect, the reinforcing gasket is connected to the reinforcing sheet to form a bent reinforcing bottom sheet, and the reinforcing bottom sheet is arched toward one side of the circumference of the screen to define an avoidance gap; a first electronic device is provided on the surface of the circuit board facing the screen, and at least a part of the orthographic projection of the first electronic device on the non-display surface is located within the orthographic projection of the avoidance gap on the non-display surface. In this way, it is beneficial to use the avoidance gap to avoid the first electronic device, thereby optimizing the structural layout of the electronic device and achieving the compactness of the electronic device structure.

[0027] In a possible implementation manner of the first aspect, the first electronic device is a camera module, the screen has a light-transmitting portion, and the light-transmitting portion is opposite to a light-incident surface of the camera module.

[0028] In a possible implementation of the first aspect, the exciter and the screen are stacked, the flexible circuit board is integrally stacked and fixed on a surface of the exciter away from the screen, and the orthographic projection of the conductive abutment portion on the non-display surface is located within the orthographic projection of the exciter on the non-display surface. This is conducive to further reducing the size of the flexible circuit board, saving layout space inside the electronic device, and avoiding the provision of a reinforcement sheet, which is conducive to reducing costs.

[0029] In a possible implementation of the first aspect, the conductive abutting portion is a pad. In this way, the conductive abutting portion does not occupy the space of the electronic device, which is conducive to saving the space of the electronic device, optimizing the structure of the electronic device, and facilitating processing and manufacturing.

[0030] In a possible implementation of the first aspect, the conductive abutting portion has an abutting surface, the abutting surface abuts against the conductive elastic member, and the equivalent diameter of the orthographic projection of the abutting surface on the non-display surface is greater than or equal to 2 mm and less than or equal to 6 mm. Thus, the abutting surface of the conductive abutting portion can be matched with conductive elastic members of different sizes within the dimensional tolerance range of the conductive elastic member, thereby ensuring reliable abutment between the conductive elastic member and the conductive abutting portion.

[0031] Exemplarily, the equivalent diameter d1 of the orthographic projection of the abutting surface on the non-display surface of the screen is 2 mm, 2.4 mm, 2.5 mm, 3 mm, 3.4 mm, 4 mm, 4.2 mm, 4.5 mm, 4.8 mm, 5 mm, 5.2 mm, 5.5 mm, or 5.8 mm.

[0032] In a possible implementation of the first aspect, the abutting surface may be a plane, thereby simplifying the processing of the abutting surface.

[0033] In a possible implementation of the first aspect, the abutting surface may be a curved surface that is concave toward the screen, such as a spherical crown surface, which is helpful to improve the reliability of the cooperation between the abutting surface and the conductive elastic member.

[0034] In a possible implementation of the first aspect, the actuator is a piezoelectric ceramic actuator. The piezoelectric ceramic actuator includes a piezoelectric ceramic sheet, which is an electronic sound-generating element, and is composed of a piezoelectric ceramic dielectric material placed between two electrodes. When an AC audio signal is connected to the two electrodes, the piezoelectric ceramic dielectric between the two electrodes will deform, causing the piezoelectric ceramic sheet to vibrate according to the frequency of the signal, thereby generating sound. Piezoelectric ceramic sheets have the advantages of small thickness, low power consumption, and high sensitivity. The use of a piezoelectric ceramic actuator including a piezoelectric ceramic sheet can reduce the thickness of the electronic device while achieving screen sound generation, which is conducive to the realization of a lightweight design of the electronic device.

[0035] In a possible implementation of the first aspect, the exciter is a micro-vibration unit exciter. The micro-vibration unit exciter, which can also be called a linear exciter, is similar in principle to a linear motor, which uses the interaction between an electric field and a magnetic field to generate a force field, thereby achieving vibration of the screen. The frequency response of the micro-vibration unit exciter within the voice range is relatively balanced and flat, which can make the screen sound good to hear.

[0036] In a possible implementation of the first aspect, the exciter and the screen are stacked, and the exciter module also includes a reinforcing gasket, which is stacked and fixed between the exciter and the non-display surface. The exciter is connected to the screen with the help of the reinforcing gasket. When the exciter vibrates, it can drive the reinforcing gasket to vibrate, and then drive the screen to vibrate. In this way, on the one hand, the exciter and the screen can be separated by the reinforcing gasket. When the screen is impacted, the impact force acting on the screen display surface can be prevented from being directly transmitted to the exciter, thereby reducing the stress on the exciter and avoiding damage to the exciter; on the other hand, after the reinforcing gasket is set, it is also beneficial to improve the structural strength of the exciter and improve the ability of the exciter to resist stress. Therefore, the protection of the exciter can be achieved by the reinforcing gasket, which is beneficial to improve the reliability of the exciter.

[0037] Exemplarily, the reinforcing gasket may be connected to the non-display surface via a first adhesive layer, and the reinforcing gasket may be connected to the actuator via a second adhesive layer.

[0038] In a possible implementation of the first aspect, the orthographic projection of the exciter on the reinforcing gasket is located within the outer peripheral edge of the reinforcing gasket. In this way, the circumferential dimension of the reinforcing gasket is larger than the circumferential dimension of the exciter, which is beneficial for absorbing the dimensional tolerance of the exciter by utilizing the dimensional difference between the reinforcing gasket and the exciter, and is beneficial for ensuring the reliability of the reinforcing gasket for reinforcing the exciter.

[0039] In a possible implementation of the first aspect, the distance between the orthographic projection of the exciter on the reinforcing gasket and the outer peripheral edge of the reinforcing gasket is greater than or equal to 0.2 mm and less than or equal to 0.3 mm. Such a configuration is conducive to ensuring that the size difference between the reinforcing gasket and the exciter can completely absorb the size tolerance of the exciter, and is also conducive to ensuring the reliability of the reinforcing gasket to reinforce the exciter. At the same time, it can also prevent the circumferential size of the reinforcing gasket from being too large, thereby occupying more space in the electronic device.

[0040] In a possible implementation of the first aspect, the electronic device includes a structural member, the structural member is arranged on the periphery of the exciter module, and an assembly gap is formed between the periphery of the exciter module and the structural member. In this way, on the one hand, it is beneficial to use the assembly gap to absorb the dimensional tolerance of the exciter module to ensure the reliability of the assembly of the exciter module, and on the other hand, it can also prevent the structural member from interfering with the work of the exciter, thereby ensuring the reliability of the exciter driving the screen.

[0041] In a possible implementation manner of the first aspect, the minimum width of the assembly gap is 0.2 mm to 1 mm.

[0042] In a possible implementation of the first aspect, the conductive elastic member is a spring or a spring, thereby having a simple structure and high elasticity.

[0043] In a possible implementation of the first aspect, the conductive elastic member is conductive foam, thereby reducing the cost.

[0044] In a possible implementation manner of the first aspect, in order to improve the structural strength of the conductive elastic member and thereby improve the working reliability of the conductive elastic member, the conductive elastic member is a metal member.

[0045] In a possible implementation of the first aspect, considering the stress wear of the conductive elastic member and the oxidation problem of the conductive elastic member after long-term use, the surface of the conductive elastic member is covered with an anti-oxidation layer. This is beneficial to preventing oxidation of the conductive elastic member and improving the reliability of the electrical connection of the conductive elastic member, and is also beneficial to improving the wear resistance of the conductive elastic member.

[0046] Exemplarily, the anti-oxidation layer may be a gold-plated layer.

[0047] In a possible implementation manner of the first aspect, in order to ensure that the conductive elastic member can be reliably compressed between the flexible circuit board and the circuit board, the height dimension of the conductive elastic member in a free expansion and contraction state is 0.45 to 0.9 mm.

[0048] In a possible implementation of the first aspect, the electronic device further includes: a housing assembly and a folding screen. The housing assembly includes a first housing, a second housing, and a hinge mechanism connected between the first housing and the second housing; the folding screen includes a first part, a second part, and a third part, the third part is connected between the first part and the second part, the first part is supported and fixed to the support surface of the first housing, the second part is supported and fixed to the support surface of the second housing, and the third part is supported and fixed to the support surface of the hinge mechanism; the screen is fixed to the end of the second housing away from the second part, and defines a second accommodating cavity with the second housing, and the circuit board is fixed in the second accommodating cavity; the electronic device can switch between an unfolded state and a folded state, in which the first part, the second part, and the third part are oriented in the same direction and in the same plane; in the folded state, the first part faces the second part. In this way, the screen of the foldable electronic device can emit sound.

[0049] In a possible implementation of the first aspect, the second shell includes a second middle plate and a second frame, a side surface of the second middle plate in the thickness direction forms a support surface of the second shell, the screen is stacked on a side of the second middle plate away from the second part, the second frame is arranged around the edge of the second middle plate and the screen, and the second middle plate, the second frame and the screen define a second accommodating cavity.

[0050] In a possible implementation manner of the first aspect, the second frame and the second middle plate are integrally formed, which is beneficial to improving the connection strength between the second frame and the second middle plate, simplifying the processing technology, and reducing the assembly cost.

[0051] In a possible implementation of the first aspect, the second frame and the second middle plate may be assembled and connected, and the assembly and connection methods include but are not limited to gluing, welding, clamping or screw connection, etc. This configuration can simplify the mold structure of the second frame and the second middle plate, and facilitate independent processing and manufacturing of the second frame and the second middle plate.

[0052] In a second aspect, the present application provides an assembly method for an electronic device, comprising the following steps: fixing the exciter module as a whole to the non-display surface of the screen to form a screen assembly; wherein the exciter module comprises an exciter and a flexible circuit board, and one end of the flexible circuit board is fixed to and electrically connected to the exciter; assembling the screen assembly as a whole with the circuit board to compress the conductive elastic member between the flexible circuit board and the circuit board, so that the flexible circuit board is electrically connected to the circuit board through the conductive elastic member.

[0053] According to the assembly method of the electronic device of the present application, the assembly process can be simplified and the assembly cost can be reduced. Moreover, the exciter module is fixed to the screen as a whole, so that the flexible circuit board is fixed to the screen as a whole, which can simplify the routing path of the flexible circuit board, avoid the problem of the length of the flexible circuit board being long due to the need for the flexible circuit board to avoid other structures inside the electronic device during the routing process, which is conducive to shortening the length of the flexible circuit board, saving space inside the electronic device, and realizing the thinning of the electronic device. In addition, the conductive elastic member is compressed between the flexible circuit board and the circuit board so that the flexible circuit board can be electrically connected to the circuit board through the conductive elastic member. This connection method does not need to consider the problem in the prior art that the flexible circuit board needs to be set longer because the flexible circuit board and the circuit board are connected by a BTB connector to prevent the flexible circuit board from being broken when the female and male seats of the BTB connector are buckled, which is conducive to further shortening the length of the flexible circuit board, saving space inside the electronic device, and further realizing the thinning of the electronic device, and this connection method has a reasonable and compact structure.

[0054] In a possible implementation of the second aspect, the flexible circuit board has a conductive abutment portion, and the conductive elastic member is fixed to the circuit board; the screen assembly is assembled with the circuit board as a whole to compress the conductive elastic member between the flexible circuit board and the circuit board, so that the flexible circuit board is electrically connected to the circuit board through the conductive elastic member. Specifically, the screen assembly is assembled with the circuit board as a whole to compress the conductive elastic member between the flexible circuit board and the circuit board, and at the same time, the conductive elastic member is stopped and electrically connected to the conductive abutment portion, so that the flexible circuit board is electrically connected to the circuit board through the conductive elastic member. As a result, the structure is simple and easy to assemble.

[0055] In a third aspect, the present application further provides a screen assembly, comprising: a screen and an actuator module. The screen has a display surface and a non-display surface disposed opposite to each other; the actuator module comprises an actuator and a flexible circuit board, the actuator is fixed to the non-display surface, and the flexible circuit board is fixed to the non-display surface as a whole, one end of the flexible circuit board is fixed to and electrically connected with the actuator, and the flexible circuit board has a conductive abutment portion.

[0056] In the screen assembly of the present application, since the exciter is fixed to the non-display surface of the screen, the flexible circuit board is fixed to the non-display surface of the screen as a whole. In this way, it is beneficial to fix the exciter module as a whole to the non-display surface of the screen, and it is convenient to assemble the screen and the exciter module as a whole with other structures inside the electronic device, which can simplify the assembly process and reduce the assembly cost. Moreover, the flexible circuit board is fixed to the screen as a whole, which can simplify the routing path of the flexible circuit board, avoid the problem of the long length of the flexible circuit board caused by the need for the flexible circuit board to avoid other structures inside the electronic device during the routing process, which is beneficial to shorten the length of the flexible circuit board, save space inside the electronic device, and help to achieve the thinning of the electronic device. In addition, the provision of the conductive abutment portion on the flexible circuit board can facilitate the use of the conductive abutment portion as an external terminal of the entire exciter module, so that the conductive abutment portion and the conductive elastic member fixed on the circuit board are abutted and electrically connected. This connection method does not need to consider the problem in the prior art that the flexible circuit board needs to be set longer because the BTB connector is used to connect the flexible circuit board to the circuit board to prevent the flexible circuit board from breaking due to pulling the flexible circuit board when the female and male sockets of the BTB connector are engaged. This is conducive to further shortening the length of the flexible circuit board, saving space inside the electronic device, and further realizing the thinning of the electronic device. In addition, this connection method has a reasonable and compact structural layout, is easy to assemble, and reduces the assembly cost.

[0057] In a possible implementation of the third aspect, the exciter may be laminated and fixed to the non-display surface of the screen, so that when the exciter is used in an electronic device, the overall thickness of the exciter and the screen can be reduced.

[0058] In a possible implementation of the third aspect, the flexible circuit board includes a second electrical connection section, the second electrical connection section is laminated and fixed to the screen, the orthographic projection of the second electrical connection section on the non-display surface is located at the periphery of the orthographic projection of the exciter on the non-display surface, and the conductive abutment portion is provided on the second electrical connection section. In this way, when the conductive abutment portion abuts and cooperates with the conductive elastic member, the vibration of the exciter is not affected, which is conducive to improving the reliability of the operation of the exciter.

[0059] In a possible implementation of the third aspect, the flexible circuit board further includes a first electrical connection section and a third electrical connection section, the exciter and the screen are stacked, the first electrical connection section is stacked and fixed on a side surface of the exciter away from the screen, the third electrical connection section is connected between the outer peripheral edge of the first electrical connection section and the outer peripheral edge of the second electrical connection section, and the third electrical connection section is located on the side to which the outer peripheral surface of the exciter faces. Thus, not only the electrical connection between the flexible circuit board and the exciter is achieved, but also the structure is simple and easy to assemble, and the entire exciter module tends to be flattened, which is conducive to realizing a thin design of the electronic device.

[0060] In a possible implementation of the third aspect, the actuator module further includes a reinforcing sheet, which is laminated and fixed between the second electrical connection section and the screen, thereby preventing the conductive elastic member from piercing the screen during assembly of the electronic device or when the screen is impacted.

[0061] Since the reinforcing sheet can be used to resist part of the impact force acting on the screen when the display surface of the screen is impacted, the structural strength of the reinforcing sheet determines the protective effect of the reinforcing sheet. On this basis, in some embodiments, in order to ensure the structural strength of the reinforcing sheet, the thickness of the reinforcing sheet can be increased, but this will increase the space occupied by the reinforcing sheet and increase the thickness of the electronic device. In order to avoid this problem, a material with greater rigidity can be selected to make the reinforcing sheet to take into account both structural strength and thickness. In some embodiments, the reinforcing sheet can be a metal part. Exemplarily, the reinforcing sheet can be a stainless steel part, an aluminum alloy part, a magnesium-aluminum alloy part, etc. Of course, the present application is not limited to this. In other embodiments, the reinforcing sheet can also be a plastic part, a glass fiber material part, etc.

[0062] In some embodiments, the thickness of the reinforcing sheet is greater than or equal to 0.1 mm and less than or equal to 1 mm. In this way, the space occupied by the reinforcing sheet in the thickness direction of the electronic device can be reduced while ensuring the structural strength of the reinforcing sheet, which is conducive to realizing a lightweight design of the electronic device.

[0063] In a possible implementation of the third aspect, the exciter module further includes a reinforcing gasket, which is located at the periphery of the reinforcing plate and connected to the reinforcing plate, and the reinforcing gasket is stacked and fixed between the exciter and the non-display surface. The exciter is connected to the screen with the help of the reinforcing gasket. When the exciter vibrates, the reinforcing gasket can be driven to vibrate, thereby driving the screen to vibrate. In this way, on the one hand, the exciter and the screen can be separated by the reinforcing gasket, and when the screen is impacted, the impact force acting on the display surface of the screen can be prevented from being directly transmitted to the exciter, thereby reducing the stress on the exciter and avoiding damage to the exciter; on the other hand, after the reinforcing gasket is set, it is also beneficial to improve the structural strength of the exciter and improve the ability of the exciter to resist stress. Therefore, the protection of the exciter can be achieved by the reinforcing gasket, which is beneficial to improve the reliability of the exciter. In addition, the connection between the reinforcing plate and the reinforcing gasket can enable the reinforcing plate and the reinforcing gasket to be connected to the screen as a whole, which is beneficial to improving the assembly effect, and the overall structural strength of the reinforcing plate and the reinforcing gasket after being connected together is higher, and the reinforcement effect is better. Furthermore, after the reinforcing sheet and the reinforcing gasket are connected together, the third connecting section can be easily reinforced at the connection between the reinforcing sheet and the reinforcing gasket, which can achieve a good reinforcement effect for the flexible circuit board.

[0064] Exemplarily, the reinforcing gasket may be connected to the non-display surface via a first adhesive layer, and the reinforcing gasket may be connected to the actuator via a second adhesive layer.

[0065] Since the reinforcing gasket can be used to resist part of the impact force acting on the screen when the display surface of the screen is impacted, the structural strength of the reinforcing gasket determines the protective effect of the reinforcing gasket. On this basis, in some embodiments, in order to ensure the structural strength of the reinforcing gasket, the thickness of the reinforcing gasket can be increased, but this will increase the space occupied by the reinforcing gasket and increase the thickness of the electronic device. In order to avoid this problem, a material with greater rigidity can be selected to make the reinforcing gasket to take into account both structural strength and thickness. In some embodiments, the reinforcing gasket can be a metal part. Exemplarily, the reinforcing gasket can be a stainless steel part, an aluminum alloy part, a magnesium-aluminum alloy part, etc.

[0066] In some embodiments, the thickness of the reinforcing gasket is greater than or equal to 0.1 mm and less than or equal to 1 mm. In this way, the space occupied by the reinforcing gasket in the thickness direction of the electronic device can be reduced while ensuring the structural strength of the reinforcing gasket, which is conducive to realizing the lightweight design of the electronic device.

[0067] In a possible implementation of the third aspect, in order to improve the connection strength between the reinforcing sheet and the reinforcing gasket, simplify their processing technology, and reduce manufacturing costs, the reinforcing gasket and the reinforcing sheet are an integrally formed part. Exemplarily, when the reinforcing sheet and the reinforcing gasket are both metal, for example, the reinforcing sheet and the reinforcing gasket can be processed by a stamping process, and the reinforcing sheet and the reinforcing gasket can also be processed by a metal powder injection molding (MIM) process. Another exemplary embodiment, when the reinforcing sheet and the reinforcing gasket are plastic, the reinforcing sheet and the reinforcing gasket can be processed by an injection molding process.

[0068] In a possible implementation of the third aspect, the reinforcing gasket is connected to the reinforcing sheet to form a reinforcing bottom sheet, and the orthographic projection of the flexible circuit board on the non-display surface is located within the orthographic projection of the reinforcing bottom sheet on the non-display surface. This can prevent the circumferential dimension of the flexible circuit board from being too large and occupying space inside the electronic device, and can also improve the reliability of the reinforcement of the flexible circuit board by the reinforcing bottom plate.

[0069] Exemplarily, in order to prevent the circumferential dimension of the flexible circuit board from being too large and occupying space inside the electronic device, the orthographic projection of the first electrical connection section on the non-display surface is located within the outer contour of the orthographic projection of the actuator on the non-display surface.

[0070] In a possible implementation of the third aspect, the reinforcing gasket is connected to the reinforcing sheet to form a bent reinforcing bottom sheet, and the reinforcing bottom sheet is arched toward one side of the circumference of the screen to define an escape gap. In this way, the escape gap is used to avoid the first electronic device on the circuit board, thereby optimizing the structural layout of the electronic device and achieving a compact structure of the electronic device.

[0071] In a possible implementation of the third aspect, the exciter and the screen are stacked, the flexible circuit board is integrally stacked and fixed on a surface of the exciter away from the screen, and the orthographic projection of the conductive abutment portion on the non-display surface is located within the orthographic projection of the exciter on the non-display surface. This is conducive to further reducing the size of the flexible circuit board, saving layout space inside the electronic device, and avoiding the provision of a reinforcement sheet, which is conducive to reducing costs.

[0072] In a possible implementation of the third aspect, the conductive abutting portion is a pad. In this way, the conductive abutting portion does not occupy the space of the electronic device, which is conducive to saving the space of the electronic device, optimizing the structure of the electronic device, and facilitating processing and manufacturing.

[0073] In a possible implementation of the third aspect, the conductive abutting portion has an abutting surface, the abutting surface abuts against the conductive elastic member, and the equivalent diameter of the orthographic projection of the abutting surface on the non-display surface is greater than or equal to 2 mm and less than or equal to 6 mm. Thus, the abutting surface of the conductive abutting portion can be matched with conductive elastic members of different sizes within the dimensional tolerance range of the conductive elastic member, thereby ensuring reliable abutment between the conductive elastic member and the conductive abutting portion.

[0074] Exemplarily, the equivalent diameter d1 of the orthographic projection of the abutting surface on the non-display surface of the screen is 2 mm, 2.4 mm, 2.5 mm, 3 mm, 3.4 mm, 4 mm, 4.2 mm, 4.5 mm, 4.8 mm, 5 mm, 5.2 mm, 5.5 mm, or 5.8 mm.

[0075] In a possible implementation of the third aspect, the abutting surface may be a plane, thereby simplifying the processing of the abutting surface.

[0076] In a possible implementation of the third aspect, the abutting surface may be a curved surface that is concave toward the screen, such as a spherical crown surface, which is helpful to improve the reliability of the cooperation between the abutting surface and the conductive elastic member.

[0077] In a possible implementation of the third aspect, the actuator is a piezoelectric ceramic actuator. The piezoelectric ceramic actuator includes a piezoelectric ceramic sheet, which is an electronic sound-generating element. The piezoelectric ceramic dielectric material is placed between two electrodes. When an AC audio signal is connected to the two electrodes, the piezoelectric ceramic dielectric between the two electrodes will deform, causing the piezoelectric ceramic sheet to vibrate according to the frequency of the signal, thereby generating sound. Piezoelectric ceramic sheets have the advantages of small thickness, low power consumption, and high sensitivity. The use of a piezoelectric ceramic actuator including a piezoelectric ceramic sheet can reduce the thickness of the electronic device while achieving screen sound generation, which is conducive to the realization of a lightweight design of the electronic device.

[0078] In a possible implementation of the third aspect, the exciter is a micro-vibration unit exciter. The micro-vibration unit exciter, also called a linear exciter, is similar in principle to a linear motor, which uses the interaction between an electric field and a magnetic field to generate a force field, thereby achieving screen vibration. The frequency response of the micro-vibration unit exciter within the voice range is relatively balanced and flat, which can make the screen sound good to hear.

[0079] In a possible implementation of the third aspect, the exciter and the screen are stacked, and the exciter module also includes a reinforcing gasket, which is stacked and fixed between the exciter and the non-display surface. The exciter is connected to the screen with the help of the reinforcing gasket. When the exciter vibrates, it can drive the reinforcing gasket to vibrate, and then drive the screen to vibrate. In this way, on the one hand, the exciter and the screen can be separated by the reinforcing gasket. When the screen is impacted, the impact force acting on the screen display surface can be prevented from being directly transmitted to the exciter, thereby reducing the stress on the exciter and avoiding damage to the exciter; on the other hand, after the reinforcing gasket is set, it is also beneficial to improve the structural strength of the exciter and improve the ability of the exciter to resist stress. Therefore, the protection of the exciter can be achieved by the reinforcing gasket, which is beneficial to improve the reliability of the exciter.

[0080] Exemplarily, the reinforcing gasket may be connected to the non-display surface via a first adhesive layer, and the reinforcing gasket may be connected to the actuator via a second adhesive layer.

[0081] In a possible implementation of the third aspect, the orthographic projection of the exciter on the reinforcing gasket is located within the outer peripheral edge of the reinforcing gasket. In this way, the circumferential dimension of the reinforcing gasket is larger than the circumferential dimension of the exciter, which is beneficial for absorbing the dimensional tolerance of the exciter by utilizing the dimensional difference between the reinforcing gasket and the exciter, and is beneficial for ensuring the reliability of the reinforcing gasket in reinforcing the exciter.

[0082] In a possible implementation of the third aspect, the distance between the orthographic projection of the exciter on the reinforcing gasket and the outer peripheral edge of the reinforcing gasket is greater than or equal to 0.2 mm and less than or equal to 0.3 mm. Such a configuration is conducive to ensuring that the size difference between the reinforcing gasket and the exciter can completely absorb the size tolerance of the exciter, and is also conducive to ensuring the reliability of the reinforcing gasket to reinforce the exciter. At the same time, it can also prevent the circumferential size of the reinforcing gasket from being too large, thereby occupying more space in the electronic device.

[0083] In a possible implementation of the third aspect, the conductive elastic member is a spring or a spring, thereby having a simple structure and high elasticity.

[0084] In a possible implementation of the third aspect, the conductive elastic member is conductive foam, thereby reducing the cost.

[0085] In a possible implementation manner of the third aspect, in order to improve the structural strength of the conductive elastic member and thereby improve the working reliability of the conductive elastic member, the conductive elastic member is a metal member.

[0086] In a possible implementation of the third aspect, considering the stress wear of the conductive elastic member and the oxidation problem of the conductive elastic member after long-term use, the surface of the conductive elastic member is covered with an anti-oxidation layer. This is beneficial to preventing oxidation of the conductive elastic member and improving the reliability of the electrical connection of the conductive elastic member, and is also beneficial to improving the wear resistance of the conductive elastic member.

[0087] Exemplarily, the anti-oxidation layer may be a gold-plated layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 A schematic diagram of the structure of a flat electronic device provided in some embodiments of the present application;

[0089] Figure 2 Based on Figure 1 An exploded schematic diagram of a flat electronic device is shown;

[0090] Figure 3 Based on Figure 1 A schematic diagram of the cross-sectional structure of the electronic device shown at line AA;

[0091] Figure 4 Based on Figure 2 An exploded schematic diagram of a structure formed by a portion of a frame, a portion of a middle plate and an exciter module and a circuit board as shown in FIG.

[0092] Figure 5 A schematic diagram of the structure of a foldable electronic device provided in some embodiments of the present application;

[0093] Figure 6 Based on Figure 5 A perspective view of the electronic device shown in an unfolded state;

[0094] Figure 7 Based on Figure 5 A perspective view of the foldable electronic device shown in a folded state;

[0095] Figure 8 Based on Figure 6 and Figure 7 A partial structural diagram of a foldable electronic device without showing a folding screen is shown in FIG.

[0096] Fig. 9 Based on Figure 8 An exploded schematic diagram of the structure shown;

[0097] Fig.10 Based on Figure 6 A schematic diagram of the cross-sectional structure of the electronic device shown at line BB;

[0098] Fig.11 Based on Fig. 9 An exploded schematic diagram of the actuator module and the circuit board shown in FIG.

[0099] Fig.12 Based on Fig.11 An exploded schematic diagram of the actuator module shown;

[0100] Fig.13 A schematic diagram of a cross-sectional structure of a possible foldable electronic device provided in the present application;

[0101] Fig.14 Based on Fig.10 An enlarged view of the portion circled at C of the foldable electronic device shown.

[0102] Fig.15 Based on Fig. 9 A schematic diagram of the screen assembly shown;

[0103] Fig.16 A three-dimensional diagram of an actuator module of some other embodiments provided in the present application;

[0104] Fig.17 Cross-sectional structural diagrams of some other flat electronic devices provided in this application;

[0105] Fig.18 A schematic diagram of the assembly process of an electronic device in some embodiments provided in the present application. DETAILED DESCRIPTION

[0106] In the embodiments of the present application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0107] In the description of the embodiments of the present application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present application generally indicates that the associated objects before and after are in an "or" relationship.

[0108] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixedly connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0109] In the description of the embodiments of the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0110] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within ±10°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within ±10°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0111] The present application provides an electronic device. The electronic device is a type of electronic device including an under-screen exciter. Specifically, the electronic device may be a portable terminal device or other suitable terminal device. For example, the electronic device includes but is not limited to a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a personal computer, a notebook computer, a vehicle-mounted device, etc. The electronic device may be a flat electronic device or a foldable electronic device.

[0112] In the following description, two types of electronic devices, namely, a flat electronic device and a foldable electronic device, are used as examples for explanation.

[0113] Next, a flat electronic device will be introduced first.

[0114] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a flat electronic device 100 provided in some embodiments of the present application. Figure 2 Based on Figure 1 The exploded schematic diagram of the flat electronic device 100 is shown. Figure 1 and Figure 2 The electronic device 100 shown is described by taking a flat mobile phone as an example, which does not constitute a special limitation of the present application. Specifically, the electronic device 100 includes a screen 10, a housing 25, a circuit board 30, a battery 40, an exciter module 60 and a conductive elastic member ( Figure 1 and Figure 2 not shown).

[0115] exist Figure 1 and Figure 2 In the illustrated embodiment, the electronic device 100 is in the shape of a rectangular flat plate. In order to facilitate the description of the embodiments below, an XYZ coordinate system is established. Specifically, the width direction of the electronic device 100 is defined as the X-axis direction, the length direction of the electronic device 100 is defined as the Y-axis direction, and the thickness direction of the electronic device 100 is defined as the Z-axis direction. It is understandable that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and is not specifically limited here.

[0116] The screen 10 is used to display information such as images, videos, and text. Figure 2 , and combined with Figure 3 , Figure 3 Based on Figure 1 The cross-sectional structure diagram of the electronic device 100 at the AA line is shown. The screen 10 includes a display surface 10a and a non-display surface 10b that are arranged opposite to each other. The display surface 10a has a display interface for displaying information such as images, videos, and texts. When a user uses the electronic device 100, the display surface 10a of the display screen 12 faces the user to present information such as images, videos, or texts to the user.

[0117] Please continue reading Figure 2 and Figure 3The shell 25 includes a middle frame and a back cover 251. The middle frame includes a middle plate 253 and a frame 252. The middle plate 253 is stacked on the side facing the non-display surface 10b of the screen 10. The back cover 251 is stacked on the side of the middle plate 253 away from the screen 10. The frame 252 is arranged around the edge of the screen 10, the middle plate 253 and the back cover 251. The middle plate 253, the frame 252 and the back cover 251 form a accommodating cavity Q. The circuit board 30 and the battery 40 are fixed in the accommodating cavity Q, that is, the circuit board 30 and the battery 40 are both located between the middle plate 253 and the back cover 251. The middle plate 253 has a mounting hole 2532 that penetrates the middle plate 253 along the thickness direction of the middle plate 253 (that is, the Z-axis direction).

[0118] The actuator module 60 can drive the screen 10 to vibrate in a direction perpendicular to the non-display surface 10b (ie, the Z-axis direction). Figure 3 The actuator module 60 includes an actuator 61 , a reinforcing gasket 62 and a flexible circuit board 63 .

[0119] The exciter 61 is used to drive the screen 10 to vibrate, so as to generate sound waves through the vibration of the screen 10, thereby achieving the sound of the screen 10. Figure 3 The actuator 61 is disposed on the non-display surface 10 b of the screen 10 . In order to reduce the thickness of the electronic device 100 while ensuring the vibration space of the actuator 61 , at least a portion of the actuator 61 is accommodated in the mounting hole 2532 .

[0120] Exemplarily, in order to prevent the exciter 61 from interfering with the circuit board 30, the position on the circuit board 30 directly facing the exciter 61 is left blank (that is, no device is set at this position). Alternatively, a device (for example, a shielding cover) on the circuit board 30 directly facing the exciter 61 is formed with an avoidance portion (not shown) for avoiding the exciter 61.

[0121] Please continue reading Figure 3 The reinforcing gasket 62 is stacked and fixed between the actuator 61 and the non-display surface 10b. The actuator 61 is connected to the screen 10 by means of the reinforcing gasket 62. When the actuator 61 vibrates, the reinforcing gasket 62 can be driven to vibrate, thereby driving the screen 10 to vibrate. A portion of the reinforcing gasket 62 can be located in the mounting hole 2532.

[0122] Please continue reading Figure 3 , and combined with Figure 4 , Figure 4 Based on Figure 2 The exploded schematic diagram of the structure formed by a part of the frame 252, a part of the middle plate 253 and the exciter module 60 and the circuit board 30 is shown in FIG. Figure 4In the figure, since the conductive elastic member 70 is hidden on the surface of the circuit board 30 facing the middle plate 253, the outline is shown by a dotted line. The flexible circuit board 63 includes a first electrical connection section 631 and a second electrical connection section 632. The first electrical connection section 631 is laminated and fixed on the surface of the exciter 61 facing the circuit board 30, and is electrically connected to the exciter 61. The second electrical connection section 632 is laminated and arranged on the surface of the middle plate 253 facing the circuit board 30. The middle plate 253 can play a role in reinforcing the second electrical connection section 632. Specifically, the surface of the middle plate 253 facing the circuit board 30 has a positioning groove 2531. The positioning groove 2531 is spaced apart from the mounting hole 2532. One end of the second electrical connection section 632 away from the first electrical connection section 631 is fixed in the positioning groove 2531. The positioning groove 2531 can play a role in positioning the second electrical connection section 632. The portion of the second electrical connection section 632 located in the positioning groove 2531 has a conductive abutment portion 633.

[0123] The conductive elastic member 70 is disposed on the surface of the circuit board 30 facing the middle plate 253 and is electrically connected to the circuit board 30. The conductive elastic member 70 abuts against the conductive abutting portion 633 (combined with Figure 3 In this way, the actuator 61 can be electrically connected to the circuit board 30 by means of the flexible circuit board 63 and the conductive elastic member 70 in sequence, so that the actuator 61 can receive the control signal of the circuit board.

[0124] In the electronic device 100 of the above embodiment, a mounting hole 2532 is provided on the middle plate 253, and at least a portion of the exciter 61 is accommodated in the mounting hole 2532. This not only facilitates the fixation of the exciter 61 to the screen, but also the exciter 61 being accommodated in the mounting hole 2532 makes the structure of the electronic device 100 more compact, thereby reducing the thickness of the electronic device 100. In addition, the first electrical connection section 631 of the flexible circuit board 63 is stacked and fixed on the surface of the exciter 61 facing the circuit board 30, and the second electrical connection section 632 is stacked and arranged on the surface of the middle plate 253 facing the circuit board 30, and the conductive elastic member 70 is abutted against the conductive abutting portion 633 on the second electrical connection section 632, which not only realizes the electrical connection between the flexible circuit board 63 and the circuit board 30, but also simplifies the routing path of the flexible circuit board 63, and avoids the redundancy problem of the flexible circuit board 63 caused by the use of a BTB connector to connect the flexible circuit board 63 and the circuit board 30, which is conducive to shortening the length of the flexible circuit board 63, saving the layout space inside the electronic device 100, and further realizing the thinness of the electronic device 100, while simplifying the disassembly and assembly of the flexible circuit board 63 inside the electronic device 100.

[0125] In addition, for the electronic device 100, since the second electrical connection section 632 needs to be reinforced by the middle plate 253, and the second electrical connection section 632 needs to be fixed to the surface of the middle plate 253 facing the circuit board 30, in the specific assembly process of the electronic device 100 described above, the screen 10 and the middle frame can be fixed together first. Then the exciter module 60 is installed in the mounting hole 2532 from the side of the middle frame away from the screen 10, and the exciter module 60 and the screen 10 are fixed by gluing or the like, and then the second electrical connection section 632 of the flexible circuit board 63 is fixed to the middle plate 253. Then the circuit board 30 is installed, and the conductive elastic member 70 is compressed, and finally the back cover 251 is assembled to complete the assembly of the electronic device 100. It can be understood that the disassembly process can be opposite to the aforementioned assembly process.

[0126] The following is an introduction to foldable electronic devices.

[0127] For a foldable electronic device, under different usage requirements, the foldable electronic device can be unfolded to an unfolded state or folded to a folded state.

[0128] See also Figure 5 , Figure 5 A schematic diagram of a foldable electronic device 100 provided in some embodiments of the present application. In this embodiment, the foldable electronic device 100 is a foldable mobile phone, which does not constitute a special limitation of the present application. Specifically, the foldable electronic device 100 includes a foldable screen 80, a housing assembly 20, a circuit board 30, a battery 40, and a screen assembly ( Figure 5 (not shown). Figure 5 In the figure, since the circuit board 30 and the battery 40 are hidden inside the electronic device 100, the outlines are shown with dotted lines.

[0129] Understandably, Figure 5 Only some components of the foldable electronic device 100 are schematically shown, and the actual shapes, sizes, positions and structures of these components are not subject to any restriction. Figure 5 restrictions.

[0130] The folding screen 80 is used to display images, videos, etc. Specifically, the folding screen 80 can be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MIL-E) display screen, a microorganic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, a quantum dot light-emitting diode (QLED) display screen, and the like.

[0131] See also Figure 6 , Figure 6 Based on Figure 5 Schematic diagram of an electronic device 100 in an unfolded state as shown. The folding screen 80 includes a first portion 81, a second portion 82, and a third portion 83 connected between the first portion 81 and the second portion 82. Among them, at least the third portion 83 of the folding screen 80 is made of a flexible material to allow the folding screen 80 to switch between the unfolded state and the folded state. The first portion 81 and the second portion 82 can be made of a flexible material, or a rigid material, or partially made of a rigid material and partially made of a flexible material, which is not specifically limited here.

[0132] In order to facilitate the description of the following embodiments, an XYZ coordinate system is established for the second part 82. Specifically, the length direction of the second part 82 is defined as the Y-axis direction (that is, the extension direction of the folding axis of the folding screen 80), the thickness direction of the second part 82 is defined as the Z-axis direction, and the direction perpendicular to both the Y-axis direction and the Z-axis direction is defined as the X-axis direction (that is, the width direction of the second part 82). It can be understood that the coordinate system setting is not limited to this, and can be flexibly set according to actual needs, and is not specifically limited here.

[0133] The folding screen 80 can be switched between an unfolded state and a folded state. Figure 6 As shown, the first part 81, the second part 82 and the third part 83 are arranged in the same plane and in the same direction. In this state, a large screen display can be achieved, which can provide users with richer information and bring users a better use experience.

[0134] See also Figure 7 , Figure 7 Based on Figure 5 1 is a perspective view of a foldable electronic device 100 in a folded state. When the folding screen 80 is in the folded state, the third portion 83 is in a bent state, and the first portion 81 ( Figure 7 ) and the second portion 82 ( Figure 7 In this state, the foldable screen 80 is not visible to the user, and the housing assembly 20 is protected outside the foldable screen 80 to prevent the foldable screen 80 from being scratched by hard objects. In this way, the foldable electronic device 100 is an inward folding electronic device. In this state, the volume of the foldable electronic device 100 can be reduced, making it easier to store and carry the foldable electronic device 100.

[0135] The housing assembly 20 is used to support and fix the folding screen 80, and to accommodate and protect the internal electronic components of the foldable electronic device 100. At the same time, the housing assembly 20 can allow the folding screen 80 to switch between the unfolded state and the folded state. Figure 8 , Figure 8 Based on Figure 6 and Figure 7 The schematic diagram of the partial structure of the foldable electronic device 100 shown in FIG. 8 is a schematic diagram of the partial structure of the foldable electronic device 100 without showing the folding screen 80. Specifically, the housing assembly 20 includes a first housing 21, a second housing 22 and a hinge mechanism 23.

[0136] Understandably, Figure 8 Only some components of the housing assembly 20 are schematically shown, and the actual shapes, sizes, positions and configurations of these components are not subject to the present disclosure. Figure 8 restrictions.

[0137] The first housing 21 is used to fix and support Figure 6 The first part 81 of the folding screen 80 is shown in FIG. 1 . Specifically, the first housing 21 has a support surface M1. The first housing 21 is fixed and supported by the support surface M1. Figure 6 The first part 81 of the middle folding screen 80. Exemplarily, the connection relationship between the support surface M1 and the first part 81 includes but is not limited to gluing. The material of the first shell 21 includes but is not limited to metal, ceramic, plastic and glass. In order to achieve the lightness and thinness of the electronic device 100 while ensuring the structural strength of the first shell 21, the material of the first shell 21 can be selected from metal.

[0138] The second housing 22 is used to fix and support Figure 6 The second part 82 of the folding screen 80 is shown in FIG. 1 . Specifically, the second housing 22 has a support surface M2. The second housing 22 is fixed and supported by the support surface M2. Figure 1The second part 82 of the middle folding screen 80. Exemplarily, the connection relationship between the support surface M2 and the second part 82 includes but is not limited to gluing. The material of the second shell 22 includes but is not limited to metal, ceramic, plastic and glass. In order to achieve the lightness and thinness of the electronic device 100 while ensuring the structural strength of the second shell 22, the material of the second shell 22 can be selected to be metal.

[0139] The shaft mechanism 23 is used to support Figure 6 The third part 83 of the folding screen 80 shown in FIG. Specifically, the hinge mechanism 23 has a support surface M3. The hinge mechanism 23 can be supported by the support surface M3. Figure 6 The third part 83 of the folding screen 80 is shown in FIG. The hinge mechanism 23 is connected between the first housing 21 and the second housing 22. The first housing 21 and the second housing 22 are configured to be rotatably connected through the hinge mechanism 23 to enable the foldable electronic device 100 to switch between the unfolded state and the folded state. The specific structure and working principle of the hinge mechanism 23 are well known to those skilled in the art and will not be described in detail here.

[0140] See also Fig. 9 and Fig.10 , Fig. 9 Based on Figure 8 An exploded schematic diagram of the structure shown, Fig.10 Based on Figure 6 The cross-sectional structure diagram of the electronic device 100 at line BB is shown. The first housing 21 includes a first middle frame and a first back cover 211 .

[0141] Specifically, the first middle frame includes a first middle plate 213 and a first frame 212 .

[0142] The first middle plate 213 is in the shape of a flat plate. For example, the first middle plate 213 is in the shape of a rectangular flat plate or a rounded rectangular flat plate. Of course, in other examples, the first middle plate 213 can also be in the shape of a semicircular flat plate, a diamond flat plate, an oblong flat plate, an elliptical or a special shape. One side surface of the first middle plate 213 in the thickness direction is formed as the above-mentioned support surface M1. The material of the first middle plate 213 includes but is not limited to glass, plastic or ceramic.

[0143] The first frame 212 is arranged around the edge of the first middle plate 213, and the first frame 212 is arranged around the edge of the first part 81. In some examples, the first frame 212 and the first middle plate 213 are integrally formed, which is conducive to improving the connection strength between the first frame 212 and the first middle plate 213, simplifying the processing technology, and reducing the assembly cost. In other examples, the first frame 212 and the first middle plate 213 can also be assembled and connected, and the assembly connection method is not limited to gluing, welding, clamping or screw connection. Such a setting can simplify the mold structure of the first frame 212 and the first middle plate 213, and facilitate the independent processing and manufacturing of the first frame 212 and the first middle plate 213. The material of the first frame 212 includes but is not limited to glass, plastic or ceramic.

[0144] The first back cover 211 is stacked on a side of the first middle plate 213 away from the support surface M1 of the first middle plate 213. The first back cover 211 is in the shape of a flat plate. The shape of the first back cover 211 can be adapted to the shape of the first middle plate 213. The first frame 212 is arranged around the edge of the first back cover 211. Exemplarily, the connection method between the first back cover 211 and the first frame 212 includes but is not limited to gluing. A first accommodating cavity Q1 is formed between the first middle frame and the first back cover 211. The first accommodating cavity Q1 is used to accommodate internal components of the electronic device 100.

[0145] Please continue reading Fig. 9 and Fig.10 The second shell 22 (also referred to as a second middle frame) includes a second middle plate 223 and a second frame 222 .

[0146] The second middle plate 223 is in the shape of a flat plate. For example, the second middle plate 223 is in the shape of a rectangular flat plate or a rounded rectangular flat plate. Of course, in other examples, the second middle plate 223 can also be in the shape of a semicircular flat plate, a rhombus flat plate, an oblong flat plate, an elliptical or a special shape. One side surface of the second middle plate 223 in the thickness direction (i.e., the Z-axis direction) is formed as the above-mentioned support surface M2. The second middle plate 223 is stacked with the second part 82. The material of the second middle plate 223 includes but is not limited to glass, plastic or ceramic.

[0147] The second frame 222 is arranged around the edge of the second middle plate 223, and the second frame 222 is arranged around the edge of the second portion 82. In some examples, the second frame 222 and the second middle plate 223 are integrally formed, which is conducive to improving the connection strength between the second frame 222 and the second middle plate 223, simplifying the processing technology, and reducing the assembly cost. In other examples, the second frame 222 and the second middle plate 223 can also be assembled and connected, and the assembly connection method includes but is not limited to gluing, welding, clamping or screw connection. In this way, the mold structure of the second frame 222 and the second middle plate 223 can be simplified, which is convenient for the independent processing and manufacturing of the second frame 222 and the second middle plate 223.

[0148] The screen assembly includes a screen 10. The screen 10 is used to display information such as images, videos, and text. Fig. 9 , and combined with Fig.10 , the screen 10 includes a display surface 10a and a non-display surface 10b that are arranged opposite to each other. The display surface 10a has a display interface. When a user uses the electronic device 100, the display surface 10a of the screen 10 faces the user to present information such as images, videos and text to the user. The screen 10 is fixed to the end of the second shell 22 that is away from the second part 82. Specifically, the screen 10 is stacked on the side of the second middle plate 223 away from the second part 82, and the non-display surface 10b of the screen 10 faces the second middle plate 223. The second frame 222 is arranged around the edge of the screen 10. For the foldable electronic device 100, the support surface M2 of the second middle plate 223 needs to support the second part 82 of the folding screen 80 to ensure the flatness of the folding screen 80. Based on this, the second housing cavity Q2 is defined by the side surface of the second middle plate 223 away from the support surface M2, the second frame 222 and the screen 10, that is, the second housing cavity Q2 is defined by the second shell 22 and the screen 10. The second receiving cavity Q2 is used to receive internal components of the electronic device 100 .

[0149] Specifically, the screen 10 includes a light-transmitting cover plate 11 and a display screen 12 .

[0150] The light-transmitting cover plate 11 is in the shape of a flat plate. The material of the light-transmitting cover plate 11 includes but is not limited to glass, plastic and ceramic. The light-transmitting cover plate 11 is mainly used to protect the display screen 12 and prevent dust.

[0151] The display screen 12 is laminated and fixed on the side surface of the transparent cover plate 11 facing the second middle plate 223. The display surface of the display screen 12 faces the transparent cover plate 11, so that the image, video and other information displayed on the display screen 12 can be observed by the user through the transparent cover plate 11. The connection method between the transparent cover plate 11 and the display screen 12 includes but is not limited to gluing. Among them, the side surface of the transparent cover plate 11 facing away from the display screen 12 is formed as the display surface 10a, and the side surface of the display screen 12 facing the second middle plate 223 is formed as the non-display surface 10b.

[0152] The display screen 12 may be a flexible display screen or a rigid display screen. For example, the display screen 12 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, a quantum dot light-emitting diode (QLED) display screen, or a liquid crystal display (LCD), etc.

[0153] The circuit board 30 is used to integrate the control chip. The circuit board 30 can be fixed in the second accommodating cavity Q2 and fixed relative to the screen 10. Specifically, the circuit board 30 is fixed on the side surface of the second middle plate 223 facing the screen 10. Exemplarily, the circuit board 30 can be fixed on the side surface of the second middle plate 223 facing the screen 10 by means of threaded connection, clamping, welding, etc. In other examples, when there are multiple circuit boards 30, part of the circuit boards 30 are fixed in the first accommodating cavity Q1, and the other part of the circuit boards 30 are fixed in the second accommodating cavity Q2. It is sufficient to ensure that the circuit board 30 is fixed in the second accommodating cavity Q2 corresponding to the screen 10.

[0154] The control chip may be, for example, an application processor (AP), a double data rate synchronous dynamic random access memory (DDR), and a universal flash storage (UFS). In some embodiments, the circuit board 30 is electrically connected to the display screen 12, and the circuit board 30 is used to control the display screen 12 to display information such as images, videos, or text.

[0155] The circuit board 30 can be a hard circuit board, a flexible circuit board, or a hard-soft circuit board. The circuit board 30 can be a FR-4 dielectric board, a Rogers dielectric board, a mixed dielectric board of FR-4 and Rogers, etc. Here, FR-4 is a code for a flame retardant material grade, and Rogers dielectric board is a high-frequency board.

[0156] The battery 40 is used to provide power for the circuit board 30, the display screen 12, the folding screen 80, etc. The battery 40 is fixed in the first accommodating cavity Q1. Exemplarily, the battery 40 can be fixed on the side surface of the first middle plate 213 facing the first back cover 211 by means of threaded connection, clamping, welding, etc. In other examples, the battery 40 can also be fixed in the second accommodating cavity Q2. Alternatively, when there are multiple batteries 40, some of the batteries 40 are fixed in the first accommodating cavity Q1, and the other batteries 40 are fixed in the second accommodating cavity Q2. The battery 40 may include but is not limited to nickel-cadmium batteries, nickel-metal hydride batteries, lithium batteries or other types of batteries.

[0157] On this basis, in order to realize the private call function of the foldable electronic device 100, please continue to refer to Fig. 9 and Fig.10 , the screen assembly also includes an exciter module 60.

[0158] See also Fig.11 and Fig.12 , Fig.11 Based on Fig. 9 The exploded schematic diagram of the actuator module 60 and the circuit board 30 shown in FIG. Fig.12 Based on Fig.11 The exploded schematic diagram of the actuator module 60 is shown. The actuator module 60 includes an actuator 61 and a flexible circuit board 63.

[0159] For a foldable electronic device 100, considering the convenience of the user when using the electronic device 100 to make a call, the actuator 61 can be fixed to the non-display surface 10b of the screen 10. Exemplary connection methods between the actuator 61 and the screen 10 include but are not limited to gluing. Since the user often folds the electronic device 100 in a folded state when using the electronic device 100 to make a call, the actuator 61 is fixed to the non-display surface 10b of the screen 10, and the actuator 61 can be used to drive the screen 10 to move in a direction perpendicular to the non-display surface 10b (that is, the direction of the screen 10). Fig.10 The screen 10 vibrates in the Z-axis direction to generate sound waves, thereby enabling the screen 10 in the foldable electronic device 100 to make sounds, which is convenient for users to use.

[0160] The actuator 61 may be in the form of a sheet or a plate. The actuator 61 may be laminated and fixed to the screen 10. In this way, the thickness of the actuator 61 is small, and when the actuator 61 is used in the electronic device 100, the size of the electronic device 100 in the thickness direction of the actuator 61 may be reduced.

[0161] The types of the actuator 61 include but are not limited to piezoelectric ceramic actuators, micro-vibration unit actuators, etc. The present application does not limit the type of the actuator 61. Among them, the piezoelectric ceramic actuator 61 includes a piezoelectric ceramic sheet, which is an electronic sounding element. The piezoelectric ceramic dielectric material is placed between two electrodes. When an AC audio signal is connected to the two electrodes, the piezoelectric ceramic medium between the two electrodes will deform, causing the piezoelectric ceramic sheet to vibrate according to the frequency of the signal, thereby generating sound. Piezoelectric ceramic sheets have the advantages of small thickness, low power consumption, and high sensitivity. The use of a piezoelectric ceramic actuator including a piezoelectric ceramic sheet can reduce the thickness of the electronic device 100 while realizing the sound of the screen 10, which is conducive to realizing the lightweight design of the electronic device 100. The micro-vibration unit actuator, which can also be called a linear actuator, is similar to the linear motor in principle. It uses the interaction between the electric field and the magnetic field to generate a force field, thereby realizing the vibration of the screen 10. The frequency response of the micro-vibration unit actuator 61 within the voice range is relatively balanced and flat, which can make the sound of the screen 10 have a good sense of hearing.

[0162] On this basis, in order to realize the driving function of the actuator 61 on the screen 10 in the foldable electronic device 100, it is necessary to design the connection method and layout relationship between the actuator module 60 and the circuit board 30.

[0163] In the flat electronic device 100 mentioned above, a mounting hole 2532 is provided on the middle plate 253. At the same time, the exciter 61 is arranged in the mounting hole 2532 and fixed to the screen 10, and the second electrical connection section 632 of the flexible circuit board 63 electrically connected to the exciter 61 is fixed to the surface of the middle plate 253 facing the circuit board 30, and the layout mode in which the conductive elastic member 70 on the circuit board 30 abuts against the second electrical connection section 632 is used, that is, a part of the exciter module 60 (that is, the reinforcing gasket 62, the exciter 61 and the first electrical connection section 631, etc.) is fixed to the screen 10, and a part of the exciter module 60 (that is, the second electrical connection section 632) is fixed to the surface of the middle plate 253 facing the circuit board 30, which can achieve the beneficial effects mentioned above.

[0164] In the foldable electronic device 100, if the layout between the exciter module 60 and the circuit board 30 can be directly transferred to the structure in the above-mentioned flat electronic device 100, it will certainly save a lot of research and development costs for the electronic device 100 manufacturer. However, as mentioned above, for the foldable electronic device 100, in order to use the second shell 22 to support the folding screen 80 to ensure the flatness of the folding screen 80, the second shell 22 and the screen 10 are used to form a second accommodating cavity Q2, and the circuit board 30 is set in the second accommodating cavity Q2. In this way, in the foldable electronic device 100, the circuit board 30 is located between the screen 10 and the second middle plate 223, and the relative position relationship between the screen 10, the circuit board 30 and the second middle plate 223 is completely different from the relative position relationship of "the middle plate 253 is located between the circuit board 30 and the screen 10" in the flat electronic device 100 mentioned above.

[0165] Based on this, if the layout relationship between the actuator module 60 and the circuit board 30 in the flat electronic device 100 described above is applied to the foldable electronic device 100, the following may be obtained: Fig.13 The structure shown in FIG. Fig.13 This is a schematic diagram of a cross-sectional structure of another possible foldable electronic device 100 provided in the present application. Fig.13 , a receiving space Q3 is formed between the second middle plate 223 and the folding screen 80. The receiving space Q3 accommodates the circuit board 30. A mounting hole 2532 is provided on the second middle plate 223. At the same time, the exciter 61 is arranged in the mounting hole 2532 and fixed to the screen 10. As a result, the second part 82 of the folding screen 80 cannot be supported by the supporting surface M2 of the second middle plate 223, and the second part 82 of the folding screen 80 has the problem of collapse and poor flatness. Moreover, this connection method requires that part of the exciter module 60 be fixed to the screen 10, and part of it be fixed to the second middle plate 223, and the assembly of the entire structure is relatively complicated.

[0166] It can be seen that the structural layout between the actuator 61 and the circuit board 30 in the flat electronic device 100 described above is not applicable to the foldable electronic device 100. Therefore, for the foldable electronic device 100, it is urgent to develop a new layout relationship between the actuator 61 and the circuit board 30.

[0167] The following focuses on the specific structure of the actuator module 60 for the foldable electronic device 100 provided in the embodiment of the present application and the layout relationship between the actuator module 60 and the circuit board 30.

[0168] See also Fig.14 , Fig.14 Based on Fig.10 The foldable electronic device 100 shown is an enlarged view of the portion circled at C.

[0169] The flexible circuit board 63 is integrally fixed to the non-display surface 10b of the screen 10 (combined with Fig. 9 ). In this way, it is beneficial to fix the actuator module 60 as a whole to the non-display surface 10b of the screen 10, and it is convenient to assemble the screen 10 and the actuator module 60 as a whole with other structures inside the electronic device 100, which can simplify the assembly process and reduce the assembly cost. In addition, the flexible circuit board 63 is fixed to the screen 10 as a whole, which can simplify the routing path of the flexible circuit board 63, avoid the problem of the flexible circuit board 63 being too long due to the need for the flexible circuit board 63 to avoid other structures inside the electronic device 100 during the routing process, which is beneficial to shorten the length of the flexible circuit board 63, save the internal space of the electronic device 100, and realize the thin design of the electronic device 100.

[0170] It should be noted here that “the flexible circuit board 63 is fixed to the non-display surface 10b of the screen 10 as a whole” means that there is a direct or indirect fixing relationship between the flexible circuit board 63 and the non-display surface 10b, and the flexible circuit board 63 is supported only by the non-display surface 10b. When there is an indirect fixing relationship between the flexible circuit board 63 and the non-display surface 10b, the intermediate medium between the flexible circuit board 63 and the non-display surface 10b is fixed and supported by the non-display surface 10b. “The exciter module 60 is fixed to the non-display surface 10b of the screen 10 as a whole” means that all components of the “exciter module 60” are fixed to the non-display surface of the screen 10 as a whole.

[0171] One end of the flexible circuit board 63 is fixed to and electrically connected to the actuator 61 . In this way, the electrode terminals of the actuator 61 can be easily led out by using the flexible circuit board 63 , so as to facilitate the electrical connection between the actuator 61 and the circuit board 30 .

[0172] The circuit board 30 is located on a side of the actuator module 60 away from the screen 10 .

[0173] The electronic device 100 further includes a conductive elastic member 70. Exemplarily, the conductive elastic member 70 may be a spring or a spring, which has a simple structure and high elasticity. In other examples, the conductive elastic member 70 may also be a conductive foam. The conductive elastic member 70 may be a metal member or a conductive plastic member. In some specific examples, in order to improve the structural strength of the conductive elastic member 70 and thus improve the reliability of the conductive elastic member 70, the conductive elastic member 70 may be a metal member.

[0174] Please continue reading Fig.14 , the conductive elastic member 70 is compressed between the flexible circuit board 63 and the circuit board 30, so that the flexible circuit board 63 can be electrically connected to the circuit board 30 through the conductive elastic member 70. Specifically, since the flexible circuit board 63 is fixed to the screen 10, the screen 10 and the circuit board 30 are relatively fixed. When the conductive elastic member 70 is installed between the flexible circuit board 63 and the circuit board 30, the conductive elastic member 70 is in a compressed state due to the force between the screen 10 and the circuit board 30. The force applied by the screen 10 to the conductive elastic member 70 is transmitted to the conductive elastic member 70 through the flexible circuit board 63. Therefore, the conductive elastic member 70 is compressed between the flexible circuit board 63 and the circuit board 30.

[0175] This connection method does not need to consider the problem in the prior art that the flexible circuit board needs to be set longer because the BTB connector is used to connect the flexible circuit board to the circuit board to prevent the flexible circuit board from breaking due to pulling the flexible circuit board when the female and male sockets of the BTB connector are engaged. This is beneficial to shortening the length of the flexible circuit board 63, saving the internal space of the electronic device 100, and is beneficial to achieving the thinning of the electronic device 100. In addition, this connection method has a reasonable structural layout, is compact, and is easy to assemble.

[0176] In order to realize the electrical connection between the flexible circuit board 63 and the conductive elastic member 70, in some embodiments, please refer to Fig.11 and Fig.12 The surface of the flexible circuit board 63 facing the circuit board 30 has a conductive abutment portion 633. The conductive abutment portion 633 has an abutment surface 6331 facing the circuit board 30. The conductive elastic member 70 is fixed on the circuit board 30. Exemplarily, the connection method between the conductive elastic member 70 and the circuit board 30 includes but is not limited to gluing, clamping, welding or screw connection.

[0177] The conductive elastic member 70 abuts against the abutting surface 6331 of the conductive abutting portion 633 and is electrically connected to the conductive abutting portion 633. In this way, the structure is simple and the assembly is convenient.

[0178] In other examples, the conductive elastic member is also fixed to the surface of the flexible circuit board facing the circuit board, the circuit board has a conductive abutment portion, and the conductive elastic member on the flexible circuit board abuts against the conductive abutment portion on the circuit board. Alternatively, in other examples, the surface of the flexible circuit board facing the circuit board and the surface of the circuit board facing the flexible circuit board both have conductive abutment portions. The conductive elastic member abuts between the conductive abutment portion on the flexible circuit board and the conductive abutment portion 633 on the circuit board 30, at which time the conductive elastic member is detachably connected to the flexible circuit board and the circuit board. In the following description, the example of the surface of the flexible circuit board 63 facing the circuit board 30 having the conductive abutment portion 633 is used for explanation.

[0179] Exemplarily, the conductive abutment portion 633 is formed as a pad. Specifically, the pad can be formed by exposing a portion of the inner layer circuit of the flexible circuit board 63. In this way, the conductive abutment portion 633 does not occupy the space of the electronic device 100 in the Z direction, which is conducive to saving the space of the electronic device 100, optimizing the structure of the electronic device 100, and facilitating processing and manufacturing. In other examples, the conductive abutment portion 633 can also be a convex point fixed to the surface of the flexible circuit board 63, for example, a solder joint.

[0180] For some examples, see Fig.15 , Fig.15 Based on Fig. 9 Schematic diagram of the screen assembly shown. In order to enable the abutting surface 6331 of the conductive abutting portion 633 to cooperate with the conductive elastic member 70 of different sizes within the dimensional tolerance range of the conductive elastic member 70, and to ensure reliable abutment between the conductive elastic member 70 and the conductive abutting portion 633, the equivalent diameter d1 of the orthographic projection of the abutting surface 6331 on the non-display surface 10b of the screen 10 is greater than or equal to 2mm and less than or equal to 6mm. Exemplarily, the equivalent diameter d1 of the orthographic projection of the abutting surface 6331 on the non-display surface 10b of the screen 10 is 2mm, 2.4mm, 2.5mm, 3mm, 3.4mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.2mm, 5.5mm, or 5.8mm.

[0181] The shape of the orthographic projection of the abutting surface 6331 on the non-display surface 10b of the screen 10 includes, but is not limited to, a circle, a rectangle, a triangle, an ellipse, a hexagon or a special shape. It is worth noting that the "equivalent diameter" refers to the diameter of a circle having the same area as the orthographic projection of the abutting surface 6331 on the non-display surface 10b of the screen 10. When the shape of the orthographic projection of the abutting surface 6331 on the non-display surface 10b of the screen 10 is a circle, the equivalent diameter is the diameter of the orthographic projection of the abutting surface 6331 on the non-display surface 10b of the screen 10.

[0182] For example, the abutting surface 6331 may be a plane. Thus, the abutting surface 6331 is easy to process. For another example, the abutting surface 6331 may be a curved surface that is concave toward the screen 10, such as a spherical crown surface. This helps to improve the reliability of the abutting surface 6331 and the conductive elastic member 70.

[0183] Please continue reading Fig.15 , and combined with Fig.11 and Fig.12 The flexible circuit board 63 includes a first electrical connection section 631 , a second electrical connection section 632 and a third electrical connection section 634 .

[0184] The first electrical connection section 631 is laminated and fixed on a side surface of the exciter 61 away from the screen 10, and is electrically connected to the exciter 61. Exemplarily, the exciter 61 has an electrode terminal on the surface away from the screen 10, and the first electrical connection section 631 is laminated and fixed on the surface of the exciter 61 away from the screen 10, and is electrically connected to the electrode terminal. The connection method between the first electrical connection section 631 and the exciter 61 includes, but is not limited to, gluing and welding.

[0185] The second electrical connection section 632 is laminated and fixed to the screen 10. The second electrical connection section 632 is located at the periphery of the actuator 61, that is, the orthographic projection of the second electrical connection section 632 on the non-display surface 10b of the screen 10 is located at the periphery of the orthographic projection of the actuator 61 on the non-display surface 10b. The conductive abutment portion 633 is provided on the surface of the second electrical connection section 632 facing the circuit board 30. Exemplarily, the connection method between the second electrical connection section 632 and the screen 10 includes but is not limited to gluing.

[0186] In this way, when the conductive abutting portion 633 abuts against the conductive elastic member 70 , the vibration of the actuator 61 will not be affected, which is beneficial to improving the reliability of the operation of the actuator 61 .

[0187] The third electrical connection section 634 is connected between the outer peripheral edge of the first electrical connection section 631 and the outer peripheral edge of the second electrical connection section 632. The third electrical connection section 634 is located on the side to which the outer peripheral surface of the exciter faces. In this way, the structure of the flexible circuit board 63 is simple, and the entire flexible circuit board 63 is substantially stacked with the screen 10, which is conducive to realizing a thin design of the electronic device 100. Exemplarily, the third electrical connection section 634 may be connected to the outer peripheral surface of the exciter 61, or may not be connected. When the third electrical connection section 634 is connected to the outer peripheral surface of the exciter 61, an adhesive connection may be used.

[0188] Based on any of the above embodiments, the actuator module 60 further includes a reinforcing gasket 62. The reinforcing gasket 62 is in the shape of a sheet. The shape of the reinforcing gasket 62 includes but is not limited to a rectangular sheet, a circular sheet, a square sheet or a special-shaped sheet.

[0189] The reinforcing gasket 62 is stacked and fixedly connected between the actuator 61 and the non-display surface 10b. The actuator 61 is connected to the screen 10 by means of the reinforcing gasket 62 (combined with Fig.14 ). When the exciter 61 vibrates, it can drive the reinforcing gasket 62 to vibrate, and then drive the screen 10 to vibrate. In this way, on the one hand, the exciter 61 can be separated from the screen 10 by the reinforcing gasket 62. When the screen 10 is impacted, it can prevent the impact force acting on the display surface 10a of the screen 10 from being directly transmitted to the exciter 61, thereby reducing the stress on the exciter 61 and preventing the exciter 61 from being damaged; on the other hand, after the reinforcing gasket 62 is provided, it is also beneficial to improve the structural strength of the exciter 61 and improve the ability of the exciter 61 to resist stress. Therefore, the exciter 61 can be protected by the reinforcing gasket 62, which is beneficial to improving the reliability of the exciter 61.

[0190] Exemplarily, the reinforcing gasket 62 and the non-display surface 10b may be connected by a first adhesive layer 65. The reinforcing gasket 62 and the actuator 61 may be adhesively connected by a second adhesive layer 66. The first adhesive layer 65 and the second adhesive layer 66 may be back adhesive or curing adhesive.

[0191] On this basis, in some embodiments, the center line of the exciter 61 coincides with the center line of the reinforcing gasket 62. Since the amplitude of the central area of ​​the exciter 61 is usually the largest, by setting the center line of the exciter 61 to coincide with the center line of the reinforcing gasket 62, the vibration intensity and force uniformity of the reinforcing gasket 62 can be ensured, thereby improving the loudness and sound quality of the sound emitted by the screen 10. The "center line" described in this application refers to a line passing through the center of gravity of the component and extending along the Z-axis direction.

[0192] When the display surface 10a of the screen 10 is impacted, the reinforcing gasket 62 can be used to resist part of the impact force acting on the screen 10, so the structural strength of the reinforcing gasket 62 determines the protective effect of the reinforcing gasket 62. On this basis, in some embodiments, in order to ensure the structural strength of the reinforcing gasket 62, the thickness of the reinforcing gasket 62 can be increased, but this will increase the occupied space of the reinforcing gasket 62 and increase the thickness of the electronic device 100. In order to avoid this problem, a material with greater rigidity can be selected to make the reinforcing gasket 62 to take into account both structural strength and thickness. In some embodiments, the reinforcing gasket 62 can be a metal part. Exemplarily, the reinforcing gasket 62 can be a stainless steel part, an aluminum alloy part, a magnesium-aluminum alloy part, etc. Of course, the present application is not limited to this. In other embodiments, the reinforcing gasket 62 can also be a plastic part, a glass fiber material part, etc.

[0193] In some embodiments, the thickness of the reinforcing gasket 62 is greater than or equal to 0.1 mm and less than or equal to 1 mm. The thickness of the reinforcing gasket 62 refers to the distance between the surface of the reinforcing gasket 62 facing the screen 10 and the surface of the reinforcing gasket 62 facing away from the screen 10. Exemplarily, the thickness of the reinforcing gasket 62 can be 0.1 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc. In this way, while ensuring the structural strength of the reinforcing gasket 62, the space occupied by the reinforcing gasket 62 in the thickness direction of the electronic device 100 can be reduced, which is conducive to realizing the lightweight design of the electronic device 100.

[0194] On this basis, in some embodiments, please continue to refer to Fig.15 , the orthographic projection of the exciter 61 on the reinforcing gasket 62 is located within the outer peripheral edge of the reinforcing gasket 62. In other words, the edge of the orthographic projection of the exciter 61 on the reinforcing gasket 62 is spaced from the outer peripheral edge of the reinforcing gasket 62, and the edge of the orthographic projection of the exciter 61 on the reinforcing gasket 62 is surrounded by the edge of the reinforcing gasket 62. In this way, the circumferential dimension of the reinforcing gasket 62 is larger than the circumferential dimension of the exciter 61, which is beneficial to utilize the size difference between the reinforcing gasket 62 and the exciter 61 to absorb the size tolerance of the exciter 61, and on the other hand, it is beneficial to ensure the reliability of the reinforcing gasket 62 reinforcing the exciter 61.

[0195] Please continue reading Fig.15 , the distance d2 between the orthographic projection of the actuator 61 on the reinforcing gasket 62 and the outer peripheral edge of the reinforcing gasket 62 is greater than or equal to 0.2 mm. Such a configuration is conducive to ensuring that the size difference between the reinforcing gasket 62 and the actuator 61 can completely absorb the size tolerance of the actuator 61, and is also conducive to ensuring the reliability of the reinforcing gasket 62 reinforcing the actuator 61.

[0196] On this basis, in order to avoid the problem that the circumferential dimension of the reinforcing gasket 62 is too large and occupies more space in the electronic device 100, the distance d2 between the edge of the orthographic projection of the exciter 61 on the non-display surface 10b of the screen 10 and the edge of the orthographic projection of the reinforcing gasket 62 on the non-display surface 10b of the screen 10 is less than or equal to 0.3mm. Exemplarily, the distance d2 between the edge of the orthographic projection of the exciter 61 on the non-display surface 10b of the screen 10 and the edge of the orthographic projection of the reinforcing gasket 62 on the non-display surface 10b of the screen 10 is 0.21mm, 0.22mm, 0.23mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, or 0.29mm.

[0197] Based on any of the above embodiments, since the conductive elastic member 70 is compressed between the flexible circuit board 63 and the circuit board 30, in order to prevent the conductive elastic member 70 from piercing the screen 10 during the assembly process or when the screen 10 is impacted, the exciter module 60 further includes a reinforcing sheet 64. The reinforcing sheet 64 is in the shape of a sheet. The shape of the reinforcing sheet 64 includes but is not limited to a rectangular sheet, a circular sheet, a square sheet or a special-shaped sheet.

[0198] The reinforcing sheet 64 is laminated and fixed between the second electrical connection section 632 and the non-display surface 10b of the screen 10. In this way, the reinforcing sheet 62 can be used to protect the screen 10, and the reinforcing sheet 64 can be used to support and reinforce the second electrical connection section 632. Exemplarily, the reinforcing sheet 64 and the non-display surface 10b can be glued together by the first glue layer 65. The reinforcing sheet 64 and the second electrical connection section 632 can also be glued together.

[0199] When the display surface 10a of the screen 10 is impacted, the reinforcing sheet 64 can be used to resist part of the impact force acting on the screen 10, so the structural strength of the reinforcing sheet 64 determines the protective effect of the reinforcing sheet 64. On this basis, in some embodiments, in order to ensure the structural strength of the reinforcing sheet 64, the thickness of the reinforcing sheet 64 can be increased, but this will increase the space occupied by the reinforcing sheet 64 and increase the thickness of the electronic device 100. In order to avoid this problem, a material with greater rigidity can be selected to make the reinforcing sheet 64 to take into account both structural strength and thickness. In some embodiments, the reinforcing sheet 64 can be a metal part. Exemplarily, the reinforcing sheet 64 can be a stainless steel part, an aluminum alloy part, a magnesium-aluminum alloy part, etc. Of course, the present application is not limited to this. In other embodiments, the reinforcing sheet 64 can also be a plastic part, a glass fiber material part, etc.

[0200] In some embodiments, the thickness of the reinforcing sheet 64 is greater than or equal to 0.1 mm and less than or equal to 1 mm. The thickness of the reinforcing sheet 64 refers to the distance between the surface of the reinforcing sheet 64 facing the screen 10 and the surface of the reinforcing sheet 64 facing away from the screen 10. Exemplarily, the thickness of the reinforcing sheet 64 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc. In this way, while ensuring the structural strength of the reinforcing sheet 64, the space occupied by the reinforcing sheet 64 in the thickness direction of the electronic device 100 can be reduced, which is conducive to realizing the lightweight design of the electronic device 100.

[0201] In some embodiments, the reinforcing gasket 62 is located at the periphery of the reinforcing plate 64. The reinforcing plate 64 and the reinforcing gasket 62 are connected to form a reinforcing bottom plate. In this way, the reinforcing plate 64 and the reinforcing gasket 62 can be connected to the screen 10 as a whole, which is conducive to improving the assembly effect, and the overall structural strength of the reinforcing plate 64 and the reinforcing gasket 62 after being connected together is higher, and the reinforcement effect is better. In addition, after the reinforcing plate 64 and the reinforcing gasket 62 are connected together, it is convenient to support and reinforce the third electrical connection section 634 at the connection between the reinforcing plate 64 and the reinforcing gasket 62, which can play a good reinforcement effect for the flexible circuit board 63.

[0202] In order to improve the connection strength between the reinforcing sheet 64 and the reinforcing gasket 62, simplify their processing technology, and reduce manufacturing costs, the reinforcing sheet 64 and the reinforcing gasket 62 can be an integrally formed part. Exemplarily, when the reinforcing sheet 64 and the reinforcing gasket 62 are both metal, for example, the reinforcing sheet 64 and the reinforcing gasket 62 can be processed by a stamping process, and the reinforcing sheet 64 and the reinforcing gasket 62 can also be processed by a metal powder injection molding (MIM) process. Another exemplary embodiment, when the reinforcing sheet 64 and the reinforcing gasket 62 are plastic, the reinforcing sheet 64 and the reinforcing gasket 62 can be processed by an injection molding process.

[0203] Of course, the present application is not limited thereto, and in other examples, the reinforcing sheet 64 and the reinforcing gasket 62 may also be connected by gluing, welding, clamping or screwing.

[0204] On the basis of the above embodiments, in some embodiments, in order to prevent the circumferential dimension of the flexible circuit board 63 from being too large and occupying the space inside the electronic device 100, and to ensure the reliable reinforcement of the flexible circuit board 63 by the reinforcement base plate, the orthographic projection of the flexible circuit board 63 on the non-display surface 10b is located within the outer peripheral contour of the orthographic projection of the reinforcement base film on the non-display surface 10b.

[0205] On this basis, exemplarily, in order to prevent the circumferential dimension of the flexible circuit board 63 from being too large and occupying the space inside the electronic device 100, the orthographic projection of the first electrical connection section 631 on the non-display surface 10b is located within the outer contour of the orthographic projection of the exciter 61 on the non-display surface 10b.

[0206] In some embodiments, please refer to Fig.15 The reinforcing bottom sheet is bent and arched toward one side of the circumference of the screen 10 to form a avoiding gap H.

[0207] Please continue reading Fig.15 The surface of the circuit board 30 facing the screen 10 has a first electronic device 31 ( Fig.15 The orthographic projection outline of the first electronic device 31 on the screen 10 is shown, and therefore is shown in a dotted frame). At least a portion of the orthographic projection of the first electronic device 31 on the non-display surface 10b is located within the orthographic projection of the avoidance gap H on the non-display surface 10b. In this way, it is beneficial to use the avoidance gap H to avoid the first electronic device 31, thereby optimizing the structural layout of the electronic device 100 and achieving the compactness of the structure of the electronic device 100.

[0208] Exemplarily, the first electronic device 31 may be a camera module. The screen 10 has a light-transmitting portion 18. The light-transmitting portion 18 is directly opposite to the light-incident surface of the camera module. In this way, it is helpful to realize the video or photo shooting function of the foldable electronic device 100 in the folded state.

[0209] Based on any of the above embodiments, in some embodiments, please continue to refer to Fig.14 and Fig.15 ,in, Fig.15 The outline of the positive projection of the structural member 90 on the screen 10 is shown, and therefore is shown in a dotted frame. The electronic device 100 also includes a structural member 90. The structural member 90 includes, but is not limited to, electronic components on the circuit board 30. The structural member 90 may be one or more. The structural member 90 is located on the side to which the outer peripheral surface of the exciter module 60 faces. An assembly gap P is formed between the structural member 90 and the outer peripheral surface of the exciter module 60. In this way, on the one hand, it is beneficial to utilize the assembly gap P to absorb the dimensional tolerance of the exciter module 60 to ensure the reliability of the assembly of the exciter module 60. On the other hand, it can also prevent the structural member 90 from interfering with the operation of the exciter 61, thereby ensuring the reliability of the exciter 61 driving the screen 10.

[0210] On this basis, the minimum width W of the assembly gap is 0.2 mm to 1 mm. For example, the minimum width W of the assembly gap is 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, or 0.95 mm.

[0211] It is worth noting that the minimum width W of the assembly gap refers to the minimum distance between the surface of the structural member 90 facing the outer peripheral surface of the exciter module 60 and the outer peripheral surface of the exciter module 60 .

[0212] On the basis of any of the above embodiments, considering the stress wear of the conductive elastic member 70 and the oxidation problem of the conductive elastic member 70 after long-term use, the surface of the conductive elastic member 70 is covered with an anti-oxidation layer. In this way, on the one hand, it is helpful to prevent the oxidation of the conductive elastic member 70 and improve the reliability of the electrical connection of the conductive elastic member 70, and on the other hand, it is also helpful to improve the wear resistance of the conductive elastic member 70.

[0213] Exemplarily, the anti-oxidation coating may be a gold coating.

[0214] On the basis of any of the above embodiments, in order to ensure that the conductive elastic member 70 can be reliably pre-pressed between the screen and the circuit board 30, the height dimension of the conductive elastic member 70 along the Z-axis direction in the free expansion and contraction state is 0.45 to 0.9 mm. For example, the height dimension along the Z-axis direction is 0.5 mm, 0.55 mm, 0.58 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, or 0.8 mm.

[0215] See also Fig.16 , Fig.16 3D diagram of the actuator module 60 of some other embodiments provided by the present application. Figure 5-Figure 15 The difference of the embodiment shown is that the flexible circuit board 63 is integrally laminated and fixed on the side surface of the actuator 61 away from the screen 10. The surface of the flexible circuit board 63 facing the circuit board 30 is provided with a conductive abutment portion 633. The orthographic projection of the conductive abutment portion 633 on the non-display surface 10b is located within the orthographic projection of the actuator 61 on the non-display surface 10b. As a result, it is beneficial to further reduce the size of the flexible circuit board 63, save the layout space inside the electronic device 100, and avoid the provision of the reinforcing sheet 64 mentioned above, which is beneficial to reduce costs.

[0216] The following is an introduction to a flat electronic device that uses a layout relationship between the actuator module 60 and the circuit board 30 in a foldable electronic device.

[0217] Specifically, for a flat electronic device 100, the plate 253 mainly serves to fix the circuit board 30 and the battery 40, and the middle plate 253 does not serve to support the screen 10. Therefore, the layout relationship between the actuator module 60 and the circuit board 30 in the foldable electronic device 100 described above is also applicable to a flat electronic device.

[0218] See also Fig.17 , Fig.17 The cross-sectional structure diagrams of some other flat electronic devices 100 provided in this application. Figure 1-Figure 4The difference of the flat electronic device 100 shown is: the specific structure of the exciter module 60, and the layout relationship between the exciter module 60 and the screen 10, the circuit board 30 and the middle plate 30. Among them, the specific structure of the exciter module 60 can refer to the description in the foldable electronic device 100 paragraph in the previous text, and will not be repeated here. Here, only the layout relationship between the exciter module 60, the screen 10, the circuit board 30 and the middle plate 30 is explained. Specifically, the exciter module 60 is fixed to the screen 10 as a whole. The inner peripheral edge of the mounting hole 2532 on the middle plate 253 is arranged around the entire exciter module 60, and the conductive elastic member 70 is passed through the mounting hole 2532 and abuts against the conductive abutment portion 633 on the flexible circuit board 63 fixed to the screen 10.

[0219] It is understandable that in other examples, the middle plate may not be provided in the flat electronic device 100. Alternatively, an escape hole is provided on the middle plate 253, which is separated from the mounting hole 2532 and is provided for the conductive elastic member 70 to pass through. As long as it is ensured that the conductive elastic member 7 and the conductive abutting portion 633 can be avoided from abutting.

[0220] Next, a method for assembling the electronic device 100 is described.

[0221] See also Fig.18 , Fig.18 A schematic diagram of an assembly process of an electronic device provided in the present application. Specifically, the assembly method of the electronic device includes the following steps:

[0222] S10: Fix the actuator module 60 as a whole to the non-display surface 10b of the screen 10 to form a screen assembly;

[0223] S20 : ​​Assembling the screen assembly as a whole with the circuit board 30 to compress the conductive elastic member 70 between the flexible circuit board 63 and the circuit board 30 , so that the flexible circuit board 63 is electrically connected to the circuit board 30 through the conductive elastic member 70 .

[0224] In this way, the assembly process can be simplified and the assembly cost can be reduced. Moreover, the flexible circuit board 63 is fixed to the screen 10 as a whole, which can simplify the routing path of the flexible circuit board 63, avoid the problem that the length of the flexible circuit board 63 is long due to the need for the flexible circuit board 63 to avoid other structures inside the electronic device 100 during the routing process, which is conducive to shortening the length of the flexible circuit board 63, saving space inside the electronic device 100, and realizing the thinning of the electronic device 100. In addition, the conductive elastic member 70 is compressed between the flexible circuit board 63 and the circuit board 30, so that the flexible circuit board 63 can be electrically connected to the circuit board 30 through the conductive elastic member 70. This connection method does not need to consider the problem in the prior art that the flexible circuit board needs to be set longer because the flexible circuit board and the circuit board are connected by a BTB connector to prevent the flexible circuit board from being broken when the female and male seats of the BTB connector are buckled, which is conducive to further shortening the length of the flexible circuit board 63, saving space inside the electronic device 100, and further realizing the thinning of the electronic device 100, and this connection method has a reasonable and compact structure.

[0225] In some specific examples, in step S20, the screen assembly is assembled as a whole with the circuit board 30 to compress the conductive elastic member 70 between the flexible circuit board 63 and the circuit board 30, so that the flexible circuit board 63 is electrically connected to the circuit board 30 through the conductive elastic member 70. Specifically, the screen assembly is assembled as a whole with the circuit board 30 to compress the conductive elastic member 70 between the flexible circuit board 63 and the circuit board 30, and the conductive elastic member 70 is stopped and electrically connected to the conductive abutment portion 633, so that the flexible circuit board 63 is electrically connected to the circuit board 30 through the conductive elastic member 70. Thus, the structure is simple and easy to assemble.

[0226] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that: include: A screen having a display surface and a non-display surface disposed opposite to each other; An exciter module, the exciter module comprising an exciter and a flexible circuit board, the exciter being fixed to the non-display surface, and the flexible circuit board being fixed to the non-display surface as a whole, and one end of the flexible circuit board being fixed to and electrically connected to the exciter; A circuit board, the circuit board is located at a side of the exciter module away from the screen and is fixed relative to the screen; A conductive elastic member is compressed between the circuit board and the flexible circuit board, and the flexible circuit board is electrically connected to the circuit board through the conductive elastic member.

2. The electronic device according to claim 1, characterized in that: The surface of the flexible circuit board facing the circuit board has a conductive abutment portion, the conductive elastic member is fixed to the circuit board, and the conductive elastic member abuts against and is electrically connected to the conductive abutment portion.

3. The electronic device according to claim 2, characterized in that: The flexible circuit board includes a second electrical connection segment, which is stacked and fixed on the screen. The orthographic projection of the second electrical connection segment on the non-display surface is located at the periphery of the orthographic projection of the exciter on the non-display surface, and the conductive abutment portion is arranged on the surface of the second electrical connection segment facing the circuit board.

4. The electronic device according to claim 3, characterized in that: The flexible circuit board also includes a first electrical connection segment and a third electrical connection segment. The exciter is stacked with the screen. The first electrical connection segment is stacked and fixed on a surface of the exciter away from the screen. The third electrical connection segment is connected between the peripheral edge of the first electrical connection segment and the peripheral edge of the second electrical connection segment. The third electrical connection segment is on the side to which the peripheral surface of the exciter faces.

5. The electronic device according to claim 4, characterized in that: The exciter module further includes a reinforcing sheet, which is stacked and fixed between the second electrical connection section and the screen.

6. The electronic device according to claim 5, characterized in that: The actuator module further includes a reinforcing gasket, which is located at the periphery of the reinforcing sheet and connected to the reinforcing sheet, and the reinforcing gasket is stacked and fixed between the actuator and the non-display surface.

7. The electronic device according to claim 6, characterized in that: The reinforcing gasket and the reinforcing sheet are integrally formed.

8. The electronic device according to claim 6 or 7, characterized in that: The reinforcing gasket is connected to the reinforcing sheet to form a reinforcing bottom sheet, and the orthographic projection of the flexible circuit board on the non-display surface is located within the orthographic projection of the reinforcing bottom sheet on the non-display surface.

9. The electronic device according to any one of claims 6 to 8, characterized in that: The reinforcing gasket is connected to the reinforcing sheet to form a bent reinforcing bottom sheet, and the reinforcing bottom sheet is arched toward one side of the circumference of the screen to define an avoidance gap; A first electronic component is disposed on a surface of the circuit board facing the screen, and at least a portion of an orthographic projection of the first electronic component on the non-display surface is located within the orthographic projection of the avoidance gap on the non-display surface.

10. The electronic device according to claim 9, characterized in that: The first electronic device is a camera module, and the screen has a light-transmitting portion, which is directly opposite to a light-incident surface of the camera module.

11. The electronic device according to claim 2, characterized in that: The exciter is stacked with the screen, the flexible circuit board is integrally stacked and fixed on a surface of the exciter away from the screen, and the orthographic projection of the conductive abutment portion on the non-display surface is located within the orthographic projection of the exciter on the non-display surface.

12. The electronic device according to any one of claims 2 to 11, characterized in that: The conductive abutting portion is a soldering pad.

13. The electronic device according to any one of claims 2 to 12, characterized in that: The conductive abutting portion has an abutting surface, the abutting surface abuts against the conductive elastic member, and an equivalent diameter of an orthographic projection of the abutting surface on the non-display surface is greater than or equal to 2 mm and less than or equal to 6 mm.

14. The electronic device according to any one of claims 1 to 13, characterized in that: The actuator is a piezoelectric ceramic actuator.

15. The electronic device according to any one of claims 1 to 14, characterized in that: The exciter and the screen are stacked together, and the exciter module further comprises a reinforcing gasket, which is stacked and fixed between the exciter and the non-display surface.

16. The electronic device according to claim 15, characterized in that: The orthographic projection of the actuator on the reinforcing gasket is located within the outer peripheral edge of the reinforcing gasket.

17. The electronic device according to claim 16, characterized in that: The distance between the orthographic projection of the actuator on the reinforcing gasket and the outer peripheral edge of the reinforcing gasket is greater than or equal to 0.2 mm and less than or equal to 0.3 mm.

18. The electronic device according to any one of claims 1 to 17, characterized in that: The electronic device comprises a structural component, wherein the structural component is arranged on the periphery of the exciter module, and an assembly gap is formed between the outer peripheral surface of the exciter module and the structural component.

19. The electronic device according to claim 18, characterized in that: The minimum width of the assembly gap is 0.2 mm to 1 mm.

20. The electronic device according to any one of claims 1 to 19, characterized in that: The conductive elastic member is a spring or a spring.

21. The electronic device according to any one of claims 1 to 20, characterized in that: The conductive elastic member is a metal member.

22. The electronic device according to claim 21, characterized in that: The surface of the conductive elastic member is covered with an anti-oxidation layer.

23. The electronic device according to any one of claims 1 to 22, characterized in that: include: A housing assembly, the housing assembly comprising a first housing, a second housing and a rotating shaft mechanism connected between the first housing and the second housing; A folding screen, the folding screen comprising a first part, a second part and a third part, the third part being connected between the first part and the second part, the first part being supported and fixed to a support surface of the first shell, the second part being supported and fixed to a support surface of the second shell, and the third part being supported to a support surface of the rotating shaft mechanism; The screen is fixed to one end of the second shell away from the second part, and defines a second accommodating cavity with the second shell, and the circuit board is fixed in the second accommodating cavity; The electronic device is capable of switching between an unfolded state and a folded state, wherein in the unfolded state, the first portion, the second portion and the third portion are oriented in the same direction and are coplanar; In the folded state, the first portion faces the second portion.

24. The electronic device according to claim 23, characterized in that: The second shell includes a second middle plate and a second frame. One side surface of the second middle plate in the thickness direction forms a supporting surface of the second shell. The screen is stacked on a side of the second middle plate away from the second part. The second frame is arranged around the edge of the second middle plate and the screen. The second middle plate, the second frame and the screen define the second accommodating cavity.

25. A method for assembling an electronic device, characterized in that: The steps include: The actuator module is fixed as a whole to the non-display surface of the screen to form a screen assembly; wherein the actuator module includes an actuator and a flexible circuit board, and one end of the flexible circuit board is fixed and electrically connected to the actuator; The screen assembly is assembled as a whole with the circuit board to compress the conductive elastic member between the flexible circuit board and the circuit board so that the flexible circuit board is electrically connected to the circuit board through the conductive elastic member.

26. The method for assembling an electronic device according to claim 25, characterized in that: The flexible circuit board has a conductive abutment portion, and the conductive elastic member is fixed to the circuit board; Assembling the screen assembly as a whole with the circuit board to compress the conductive elastic member between the flexible circuit board and the circuit board so that the flexible circuit board is electrically connected to the circuit board through the conductive elastic member specifically includes: The screen assembly is assembled as a whole with the circuit board to compress the conductive elastic member between the flexible circuit board and the circuit board, and at the same time the conductive elastic member is stopped and electrically connected to the conductive abutment portion, so that the flexible circuit board is electrically connected to the circuit board through the conductive elastic member.

27. A screen assembly, characterized in that: include: A screen having a display surface and a non-display surface disposed opposite to each other; An exciter module, the exciter module includes an exciter and a flexible circuit board, the exciter is fixed to the non-display surface, and the flexible circuit board is fixed to the non-display surface as a whole, one end of the flexible circuit board is fixed to and electrically connected to the exciter, and the flexible circuit board has a conductive abutment portion.

28. The screen assembly according to claim 27, characterized in that: The flexible circuit board includes a second electrical connection segment, which is stacked and fixed on the screen. The orthographic projection of the second electrical connection segment on the non-display surface is located at the periphery of the orthographic projection of the exciter on the non-display surface, and the conductive abutment portion is arranged on the second electrical connection segment.

29. The screen assembly according to claim 28, characterized in that: The flexible circuit board also includes a first electrical connection segment and a third electrical connection segment. The exciter is stacked with the screen. The first electrical connection segment is stacked and fixed on a surface of the exciter away from the screen. The third electrical connection segment is connected between the peripheral edge of the first electrical connection segment and the peripheral edge of the second electrical connection segment. The third electrical connection segment is on the side to which the peripheral surface of the exciter faces.

30. The screen assembly according to claim 29, characterized in that: The exciter module further includes a reinforcing sheet, which is stacked and fixed between the second electrical connection section and the screen.

Images