Electronic device

Abstract

The utility model discloses electronic equipment, and relates to the technical field of electronic equipment. The electronic equipment comprises a shell, a first circuit board, a second circuit board and a transmission layer, the first circuit board and the second circuit board are arranged in the shell at an interval; the transmission layer is arranged on the shell, two ends of the transmission layer are movably connected with the first circuit board and the second circuit board, and the transmission layer is used for signal transmission of the first circuit board and the second circuit board.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular to an electronic device. BACKGROUND

[0002] Some handheld devices, such as mobile phones or tablets, are provided with a main board and a small board, and the main board and the small board are usually connected through a coaxial line.

[0003] However, the coaxial line needs to be connected to the small board after passing through the battery compartment from the side of the main board in the width direction of the whole machine, which will occupy a certain space in the width direction of the whole machine, limit the size and capacity of the battery, and at the same time, the coaxial line is easily damaged by the corners of other elements during assembly, resulting in poor function or performance and affecting signal transmission effect. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an electronic device, which comprises

[0005] a shell;

[0006] a first circuit board and a second circuit board, which are arranged in the shell at intervals;

[0007] a transmission layer arranged on the shell, two ends of the transmission layer being movably connected to the first circuit board and the second circuit board for signal transmission of the first circuit board and the second circuit board.

[0008] In some modified embodiments of the present application, the aforementioned electronic device further comprises a first conductive part and a second conductive part;

[0009] a first end of the first conductive part being electrically connected to the first circuit board, and a second end of the first conductive part movably abutting against the transmission layer;

[0010] a first end of the second conductive part being electrically connected to the second circuit board, and a second end of the second conductive part movably abutting against the transmission layer.

[0011] In some modified embodiments of the present application, the aforementioned electronic device, wherein the first conductive part and the second conductive part each comprise a conductive piece and a switching switch;

[0012] an input end of the switching switch being electrically connected to the first circuit board or the second circuit board, and an output end of the switching switch being electrically connected to a first end of the conductive piece;

[0013] a second end of the conductive piece movably abutting against the transmission layer.

[0014] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, wherein the transmission layer comprises a conductive layer, a first insulating layer and a shielding layer arranged in a stack, and the conductive layer is attached to the inner wall of the shell.

[0015] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, wherein the thickness of the transmission layer is less than 0.05 mm.

[0016] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, wherein the transmission layer is provided with a connection portion towards the first end of the first circuit board and a connection portion towards the second end of the second circuit board, respectively.

[0017] The conductive layer is exposed by the connection portions to movably connect the first circuit board and the second circuit board.

[0018] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, wherein the transmission layer comprises a metal layer attached to the inner wall of the shell.

[0019] The electronic device further comprises a second insulating layer arranged on the side of the transmission layer facing the inner wall of the shell.

[0020] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, wherein the shell comprises a first shell and a second shell.

[0021] The first shell and the second shell are rotatably connected, and the first circuit board and the second circuit board are arranged in the first shell and the second shell, respectively.

[0022] The transmission layer is arranged at the rotatable connection portion of the first shell and the second shell.

[0023] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, wherein the shell further comprises a third shell.

[0024] The third shell corresponds to the rotatable connection portion of the first shell and the second shell.

[0025] The transmission layer is arranged on the third shell.

[0026] In some embodiments of the present application, the electronic device as claimed in the preceding embodiment, further comprising a display screen.

[0027] The display screen is connected to the shell, and the display screen covers the first circuit board and the second circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings, in which like reference numerals refer to like elements throughout. The following detailed description is presented to enable any person skilled in the art to make and use the application. Numerous specific details are described to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without these specific details. In other instances, well known methods have not been described in detail in order to avoid obscuring the present application. Those skilled in the art will appreciate the

[0029] Figure 1 Fig. 1 schematically shows a first structural schematic diagram of an electronic device provided by the present embodiment;

[0030] Figure 2 Fig. 2 schematically shows a cross-sectional schematic diagram of the electronic device in Fig. 1; Figure 1

[0031] Figure 3 Fig. 3 schematically shows a second structural schematic diagram of an electronic device provided by the present embodiment;

[0032] Figure 4 Fig. 4 schematically shows another state schematic diagram of the electronic device in Fig. 3; Figure 3

[0033] Fig. 5 is a legend of the reference numerals in the drawings, in which: housing 1, hidden groove 11, first circuit board 2, second circuit board 3, transmission layer 4, conductive layer 41, first insulating layer 42, shielding layer 43, first conductive part 5, second conductive part 6, conductive part 61, first housing 7, second housing 8, third housing 9, battery 10. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings, wherein the same or similar components are denoted by the same reference numerals, and thus repeated description is omitted as necessary. As those skilled in the art would realize, the described embodiments can be modified in various different ways, all without departing from the scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and explanations given are to be presented for the purpose of illustrating the general principles of the present disclosure.

[0035] It should be noted that the technical terms or scientific terms used in the present application should be understood as their general meanings understood by those skilled in the art, unless otherwise specified.

[0036] The technical solution of the present embodiment is to solve the above technical problems, and the general idea is as follows:

[0037] Embodiment 1

[0038] Reference is made to the accompanying drawings Figure 1 ​​The electronic device provided by the embodiment of the present application comprises a shell 1, a first circuit board 2, a second circuit board 3 and a transmission layer 4; the first circuit board 2 and the second circuit board 3 are arranged in the shell 1 at intervals; the transmission layer 4 is arranged on the shell 1, and the two ends of the transmission layer 4 are movably connected to the first circuit board 2 and the second circuit board 3, for signal transmission of the first circuit board 2 and the second circuit board 3.

[0039] Specifically, in order to solve the problem that the coaxial line occupies space and affects the capacity of the battery 10, in the electronic device provided by the embodiment, the transmission layer 4 is arranged on the inner wall of the shell 1 to electrically connect the first circuit board 2 and the second circuit board 3, and the transmission layer 4 is used to replace the coaxial line to effectively release the accommodation space in the shell 1, and the arrangement of the transmission layer 4 on the inner wall of the shell 1 will not be affected by the internal components of the electronic device, and the problem of damage and poor function or performance will not occur.

[0040] In the embodiment, the electronic device is a handheld mobile electronic device, which can be but is not limited to a mobile phone or a tablet computer.

[0041] The shell 1 is a rigid structure, which has an accommodation space to accommodate the first circuit board 2, the second circuit board 3 and other electronic components, and the shell 1 can be the shell of the electronic device. The shell 1 can be a groove-shaped structure corresponding to a straight phone, a structure surrounding a cavity, a middle frame structure and the like, and the shell 1 can also be a split structure of a folding phone. When the shell 1 corresponds to a straight phone, the first circuit board 2 and the second circuit board 3 can be in the same space at the same time, and when the shell 1 corresponds to a folding phone, the first circuit board 2 and the second circuit board 3 can be located in the space of a folding body, respectively. The shape and size of the shell 1 are not limited herein, and can be designed and adjusted according to the product requirements of the electronic device.

[0042] In the embodiment, one of the first circuit board 2 and the second circuit board 3 can be a main board, which is the core circuit board of the electronic device, and can be provided with CPU, GPU, functional chip, storage interface, expansion slot, memory and the like. The other can be a small board, which can be used to expand and enhance the function of the main board, and can be used as a carrier of an external port and a carrier of an antenna transceiver. In the embodiment, the first circuit board 2 is taken as the main board and the second circuit board 3 is taken as the small board, which will be described in detail. The first circuit board 1 and the second circuit board 2 can be arranged at intervals along the length direction of the electronic device, and a sub-accommodation space can be formed therebetween, which can be but is not limited to used for mounting the battery 10.

[0043] The transmission layer 4 can be a conductive coating structure or a metal sheet, a metal film material with small thickness, etc. The transmission layer 4 is arranged on the inner wall of the shell 1 and can cross the sub-accommodation space to transmit signals between the first circuit board 2 and the second circuit board 3. The transmission layer 4 can be arranged on the inner wall parallel to the first circuit board 2 or arranged on the inner wall perpendicular to the first circuit board 2. When the transmission layer 4 is parallel to the first circuit board 2, the width of the electronic device can be reduced. When the transmission layer 4 is perpendicular to the first circuit board 2, the thickness of the electronic device can be reduced. When the width and the thickness of the electronic device do not change, the transmission layer 4 can replace the coaxial line between the first circuit board 2 and the second circuit board 3, release the width of the sub-accommodation space, and thus increase the size and the capacity of the battery 10 and improve the endurance of the electronic device. In the embodiment, the electrical connection between the transmission layer 4 and the first circuit board 2 and the second circuit board 3 can be achieved by the movable abutment of the conductive spring or the abutment of the conductive bolt. In the embodiment, the transmission layer 4 can be used for transmitting radio frequency signals, for example, the first circuit board 2 is provided with an antenna chip, such as a high-frequency spectrum antenna in the 4G long term evolution (LET, Long Term Evolution), and the second circuit board 3 is provided with a signal transceiver of the antenna, and the transmission layer 4 is used for electrically connecting the antenna chip and the signal transceiver to transmit radio frequency signals.

[0044] According to the above, the electronic device provided by the application realizes the electrical connection between the first circuit board 2 and the second circuit board 3 by arranging the transmission layer 4 on the inner wall of the shell 1, reduces the space required by the connecting line between the first circuit board 2 and the second circuit board 3, increases the accommodation space for the battery 10 and other components in the shell 1, increases the capacity of the battery 10 and prolongs the endurance, and solves the problem that the coaxial line occupies space and affects the capacity of the battery 10. At the same time, the transmission layer 4 can also effectively avoid the problem that the coaxial line is easily damaged at the corner of the component and affects the signal transmission effect.

[0045] In this paper, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can be understood as: A and B can exist at the same time, A can exist alone, B can exist alone, and any one of the above three cases can exist.

[0046] Further, with reference to the accompanying Figure 1 In the specific implementation, the electronic device provided by the embodiment further includes a first conductive part 5 and a second conductive part 6. The first end of the first conductive part 5 is electrically connected to the first circuit board 2, and the second end of the first conductive part 5 movably abuts against the transmission layer 4. The first end of the second conductive part 6 is electrically connected to the second circuit board 3, and the second end of the second conductive part 6 movably abuts against the transmission layer 4.

[0047] It can be understood that, in order to realize the electrical conduction between the transmission layer 4 and the first circuit board 2 and the second circuit board 3, the first conductive part 5 and the second conductive part 6 are arranged on the first circuit board 2 and the second circuit board 3 respectively in the embodiment, and the structures of the first conductive part 5 and the second conductive part 6 can be the same or different, as long as the electrical conduction between the circuit board and the transmission layer 4 is realized, for example, a conductive spring, a conductive bolt and the like. In the embodiment, the first conductive part 5 and the second conductive part 6 are arranged on the first circuit board 2 and the second circuit board 3 to realize the relative fixation of the two conductive parts, thereby improving the convenience of installation.

[0048] Further, the electronic device provided by the embodiment, in specific implementation, the first conductive part 5 and the second conductive part 6 both include a conductive piece 61 and a switch (not shown in the figure); an input end of the switch is electrically connected to the first circuit board 2 or the second circuit board 3, and an output end of the switch is electrically connected to a first end of the conductive piece 61; a second end of the conductive piece 61 movably abuts against the transmission layer 4.

[0049] It can be understood that, in order to improve the utilization rate of the transmission layer 4, the two conductive parts can be arranged in the form of including a conductive piece 61 and a switch in the embodiment, and the conductive piece 61 can be a conductive spring, a conductive bolt, a conductive metal piece or the like; the switch can be a device that realizes the conduction and disconnection of different circuits through self-adjustment, and the switch can be, but is not limited to, a single-pole double-throw type, a double-pole double-throw type, a rotary switch and the like in the embodiment, thereby being capable of time-division multiplexing corresponding to multiple frequency band different antenna chips, for example, the first circuit board 2 is provided with a first 4G LET antenna chip and a second 4G LET antenna chip, and the signal frequency bands of the two are different, which are N77 and N78 respectively, and the second circuit board 3 is provided with a first transceiver and a second transceiver correspondingly, and the two ends of the transmission layer 4 can switch two paths through the switch, thereby realizing the conduction of the first 4G LET antenna chip and the first transceiver and the conduction of the second 4G LET antenna chip and the second transceiver, and ensuring the time-division multiplexing of the transmission layer 4 corresponding to different antennas without increasing the number of wires or transmission layer settings.

[0050] Further, with reference to the accompanying Figure 2 The electronic device provided by the embodiment, in specific implementation, the transmission layer 4 includes a conductive layer 41, a first insulating layer 42 and a shielding layer 43 arranged in layers, and the conductive layer 41 is attached to the inner wall of the shell 1.

[0051] It can be understood that, in order to realize the signal transmission of the transmission layer 4 and prevent the interference of other same-frequency signals, the transmission layer 4 in the embodiment is provided with a laminated conductive layer 41, a first insulating layer 42 and a shielding layer 43. The conductive layer 41 can be a coating layer with signal conduction function, and can be engraved by laser direct structuring (LDS). The first insulating layer 42 can be an insulating paint with insulating external signal function, for example, a cyan or colored insulating paint sprayed on the surface of an electronic device. The first insulating layer 42 in the embodiment can prevent the conductive layer 41 from being abnormally contacted and conducted with two circuit boards or other electronic components to generate side effects. The shielding layer 43 can be a coating layer with anti-signal interference and electromagnetic radiation shielding function. In the embodiment, the shielding layer 43 is arranged on the transmission layer 4 towards the inside of the device, which can shield the signals with the same frequency as the antenna chip from other active devices inside the mobile phone, so as to ensure the antenna communication quality, for example, multimedia signals. In the embodiment, part of the first insulating layer 42 and the shielding layer 43 can be removed at both ends of the transmission layer 4 to expose the conductive layer 41. In addition, the two ends of the conductive layer 41 can be extended to protrude out of the coverage area of the first insulating layer 42 and the shielding layer 43, so as to be connected with the first conductive part 5 and the second conductive part 6.

[0052] Further, the electronic device provided by the embodiment is provided with a connection at the first end of the transmission layer 4 towards the first circuit board 2 and a connection at the second end of the transmission layer 4 towards the second circuit board 3. The conductive layer 41 is exposed by the connections to movably connect the first circuit board 2 and the second circuit board 3.

[0053] It can be understood that, in order to realize the connection between the conductive layer 41 and the two conductive parts, the embodiment is provided with a connection at the first end of the transmission layer 4 towards the first circuit board 2 and a connection at the second end of the transmission layer 4 towards the second circuit board 3. The conductive layer 41 is exposed by the connections. In the embodiment, part of the first insulating layer 42 and the shielding layer 43 can be removed at both ends of the transmission layer 4 to expose the conductive layer 41. In addition, the two ends of the conductive layer 41 can be extended to protrude out of the coverage area of the first insulating layer 42 and the shielding layer 43. The shape and size of the connection are not limited herein, and can be designed and adjusted according to actual needs. For example, the size of the connection can be designed and adjusted to be larger than the size of one end of the conductive part towards the transmission layer 4, so as to reduce the requirement for connection precision and improve the convenience of installation.

[0054] Further, the electronic device provided by the embodiment is provided with a connection at the first end of the transmission layer 4 towards the first circuit board 2 and a connection at the second end of the transmission layer 4 towards the second circuit board 3. The conductive layer 41 is exposed by the connections to movably connect the first circuit board 2 and the second circuit board 3.

[0055] It can be understood that, in order to realize the connection between the conductive layer 41 and the two conductive parts, the embodiment is provided with a connection at the first end of the transmission layer 4 towards the first circuit board 2 and a connection at the second end of the transmission layer 4 towards the second circuit board 3. The conductive layer 41 is exposed by the connections. In the embodiment, part of the first insulating layer 42 and the shielding layer 43 can be removed at both ends of the transmission layer 4 to expose the conductive layer 41. In addition, the two ends of the conductive layer 41 can be extended to protrude out of the coverage area of the first insulating layer 42 and the shielding layer 43. The shape and size of the connection are not limited herein, and can be designed and adjusted according to actual needs. For example, the size of the connection can be designed and adjusted to be larger than the size of one end of the conductive part towards the transmission layer 4, so as to reduce the requirement for connection precision and improve the convenience of installation. Figure 2The inner wall of the shell 1 is provided with a hidden groove 11, the depth of the hidden groove 11 is 0.75 mm, which can accommodate a coaxial line, in order to effectively release space in the embodiment, the transmission layer 4 can be arranged on the inner wall of the hidden groove 11, and the thickness of the transmission layer 4 is arranged to be 0.05 mm, so that the space width of 0.7 mm can be effectively released; of course, the setting can be designed and adjusted according to actual needs, for example: according to the size of the hidden groove 11, according to the size of the battery 10.

[0056] Further, the electronic device provided by the embodiment includes a metal layer, the metal layer is attached to the inner wall of the shell 1; the electronic device further includes a second insulating layer (not shown in the figure), the second insulating layer is arranged on one side of the transmission layer 4 facing the inner wall of the shell 1.

[0057] It can be understood that the transmission layer 4 in the embodiment can also be a metal layer, which can be a metal plate with small thickness or a metal film layer to realize electrical conduction with the first circuit board 2 and the second circuit board 3. In addition, in order to avoid electrical conduction between the transmission layer 4 and the shell 1 affecting normal work, the second insulating layer can also be arranged in the embodiment, the material and preparation process of the second insulating layer can be the same as those of the first insulating layer 42, and the second insulating layer can isolate and protect between the shell 1 and the transmission layer 4. Especially when the shell 1 is made of metal, the second insulating layer can greatly improve the working performance and safety of the equipment.

[0058] Further, the electronic device provided by the embodiment includes a display screen (not shown in the figure); the display screen is connected with the shell 1, and the display screen covers the first circuit board 2 and the second circuit board 3.

[0059] It can be understood that the electronic device provided by the embodiment also includes a display screen, which can be but is not limited to an OLED, LED, micro-LED, flexible display screen and the like. In the embodiment, the display screen is arranged in the shell 1, and the shell 1 can be provided with a partition structure in the middle of the thickness direction, the first circuit board 2 and the second circuit board 3 are located on one side of the partition, the display screen is located on the other side of the partition, and the side where the first circuit board 2 is located is kept relatively sealed.

[0060] Embodiment 2

[0061] Further, with reference to the accompanying Figure 3 and the accompanying Figure 4In the specific implementation, the shell 1 includes a first shell 7 and a second shell 8; the first shell 7 and the second shell 8 are rotationally connected; the first circuit board 2 and the second circuit board 3 are respectively arranged in the first shell 7 and the second shell 8; and the transmission layer 4 is correspondingly arranged at the rotationally connected position of the first shell 7 and the second shell 8.

[0062] It can be understood that the electronic device provided in the embodiment can be a folding handheld device, and the shell 1 can include the rotationally connected first shell 7 and second shell 8, both of which are rigid structures and each have a space for accommodating the first circuit board 2 and the second circuit board 3, respectively. The first shell 7 and the second shell 8 can be the housings of the two bodies of the folding device, and can be a groove structure, a structure surrounding a cavity, a middle frame structure, etc. The first shell 7 and the second shell 8 can be rotationally connected through a rotating shaft. In this embodiment, the first circuit board 1 can be a main board located in the body to which the first shell 7 belongs, and can be provided with a CPU, a GPU, and a heat dissipation element; and the second circuit board 3 can be a small board located in the body to which the second shell 8 belongs, and can be used for function expansion, such as a camera, a display screen controller, an antenna transceiver, an audio processor, and an external port. In this arrangement, the transmission layer 4 is correspondingly arranged at the rotationally connected position of the first shell 7 and the second shell 8, for example, can be arranged on the first shell 7 and extend into the second shell 8 through the rotationally connected position. The part corresponding to the rotationally connected position can be arranged on the rotating shaft or the inner wall of the rotating shaft cover used for shielding the rotating shaft. Correspondingly, the conductive part arranged in the first shell 7 and the second shell 8 realizes the electrical connection between the circuit board and the transmission layer 4. The conductive part can be, but is not limited to, a spring. The electronic device can maintain the electrical connection between the first circuit board 2 and the transmission layer 4 and the electrical connection between the second circuit board 3 and the transmission layer 4 in both the unfolded state and the folded state.

[0063] Further, with reference to the accompanying drawings Figure 3 and the accompanying drawings Figure 4 In the specific implementation, the shell 1 further includes a third shell 9; the third shell 9 corresponds to the rotationally connected position of the first shell 7 and the second shell 8; and the transmission layer 4 is arranged on the third shell 9.

[0064] It can be understood that, in order to improve the use safety and appearance of the electronic device, the third shell 9 can be arranged at the rotationally connected position of the first shell 7 and the second shell 8 in the embodiment, and the third shell 9 is used for shielding the rotating shaft. When the first shell 7 and the second shell 8 are close to each other to the parallel state, the third shell 9 is exposed, that is, the third shell 9 is arranged at the rotationally connected position of the first shell 7 and the second shell 8. Figure 4When the first shell 7 and the second shell 8 are away from each other to be in the same plane, the third shell 9 is hidden by the first shell 7 and the second shell 8, and the third shell 9 cannot be seen from outside the electronic device, that is Figure 3 The setting is easy to be understood by those skilled in the art, and will not be described here. Correspondingly, in this setting, the inner wall of the third shell 9 can be provided with the transmission layer 4, which can be Figure 3 and Figure 4 The transmission layer 4 is provided on the entire inner surface of the third shell 9, or can be provided on part of the inner surface of the transmission layer 4, for example, corresponding to Figure 4 The inner surface of the part of the third shell 9 exposed outside the whole device is provided with the transmission layer 4; in cooperation, the first circuit board 2 is connected with the transmission layer 4 through the first conductive part 5 in the first shell 7, and the second circuit board 3 is connected with the transmission layer 4 through the second conductive part 6 in the second shell 8, so that the transmission layer 4 can realize the electrical conduction between the first circuit board 2 and the second circuit board 3 around the rotating shaft, instead of the wiring in the rotating shaft, effectively reducing the size of the device at the rotating shaft. Correspondingly, in this setting, the display screen can have a first part corresponding to the first shell 7 and a second part corresponding to the second shell 8, and the two parts can be separate or a flexible screen.

[0065] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic device, comprising: At least comprising: a shell; a first circuit board and a second circuit board, which are arranged in the shell at intervals; a transmission layer arranged on the shell, two ends of the transmission layer movably connecting the first circuit board and the second circuit board for signal transmission of the first circuit board and the second circuit board.

2. The electronic device according to claim 1, further comprising: a first conductive part and a second conductive part; a first end of the first conductive part electrically connected to the first circuit board, and a second end of the first conductive part movably abutting against the transmission layer; a first end of the second conductive part electrically connected to the second circuit board, and a second end of the second conductive part movably abutting against the transmission layer.

3. The electronic device according to claim 2, wherein: the first conductive part and the second conductive part each comprise a conductive piece and a switch; an input end of the switch is electrically connected to the first circuit board or the second circuit board, and an output end of the switch is electrically connected to a first end of the conductive piece; a second end of the conductive piece movably abuts against the transmission layer.

4. The electronic device according to claim 1, wherein: the transmission layer comprises a conductive layer, a first insulating layer and a shielding layer arranged in layers, and the conductive layer is in close contact with an inner wall of the shell.

5. The electronic device according to claim 4, wherein: a thickness of the transmission layer is less than 0.05 mm.

6. The electronic device according to claim 4, wherein: the transmission layer is provided with a connecting portion towards a first end of the first circuit board and a second end of the second circuit board, respectively; the conductive layer is exposed from the connecting portion to movably connect the first circuit board and the second circuit board.

7. The electronic device according to claim 1, wherein: the transmission layer comprises a metal layer, and the metal layer is in close contact with an inner wall of the shell; the electronic device further comprises a second insulating layer arranged on a side of the transmission layer facing the inner wall of the shell.

8. The electronic device according to claim 1, wherein: the shell comprises a first shell and a second shell; the first shell and the second shell are rotationally connected, and the first circuit board and the second circuit board are arranged in the first shell and the second shell, respectively; the transmission layer is arranged at a rotationally connected portion of the first shell and the second shell.

9. The electronic device according to claim 8, wherein: the shell further comprises a third shell; the third shell corresponds to the rotationally connected portion of the first shell and the second shell; the transmission layer is arranged on the third shell.

10. The electronic device according to claim 1, further comprising: a display screen; the display screen is connected to the shell, and the display screen covers the first circuit board and the second circuit board.

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