Electronic device

Abstract

The present application relates to the technical field of electronic devices, and provides an electronic device, which is used to solve the problem of how to improve the bonding reliability between a display screen and a middle frame. A middle frame of the electronic device is provided with an accommodating recess, and the accommodating recess comprises a recess bottom wall. At least a portion of a display screen is located in the accommodating recess. A fixing part of the display screen is located on the back side of a first body part, and a bent part is connected between an edge of the first body part and the fixing part. A first adhesive is bonded between the fixing part and the first body part. At least a portion of a second adhesive is bonded between the recess bottom wall and the fixing part. The second adhesive has an elastic modulus less than or equal to 5 MPa. Alternatively, the shear strength between the second adhesive and the fixing part is less than the shear strength between the first adhesive and the fixing part, and less than the shear strength between the first adhesive and the first body part. Alternatively, the shear strength between the second adhesive and the recess bottom wall is less than the shear strength between the first adhesive and the fixing part, and less than the shear strength between the first adhesive and the first body part.

Description

electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on July 31, 2023, with application number 202310962422.6 and invention name “Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic products, and in particular to an electronic device. Background Art

[0003] With the development of electronic products, electronic devices such as mobile phones and tablets are usually equipped with display screens to display images and videos. The display screen of the electronic device can be fixed to the middle frame by bonding. Since the output structure of the display screen is bent from the edge of the main body for displaying videos and images to the back side of the main body, the output structure of the display screen is usually only bonded to the middle frame through a cover plate, and the bonding strength is relatively weak. Once the bonding structure here fails, the screen will warp up and external dust and water vapor will enter the interior of the electronic device to damage the display panel and other devices, making the reliability of the whole machine poor and affecting the user experience.

[0004] Summary of the Invention

[0005] An embodiment of the present application provides an electronic device for solving the problem of how to improve the reliability of bonding between a display screen and a middle frame.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] An embodiment of the present application provides an electronic device, which includes a middle frame, a display screen, a first colloid and a second colloid. The middle frame has a receiving groove, and the receiving groove includes a groove bottom wall. At least a portion of the display screen is located in the receiving groove. The display screen includes a first main body, a bending portion and a fixed portion, the fixed portion is located on the back side of the first main body, and the bending portion is connected between the edge of the first main body and the fixed portion. The first colloid is bonded between the fixed portion and the first main body. At least a portion of the second colloid is bonded between the groove bottom wall and the fixed portion. The elastic modulus of the second colloid is less than or equal to 5 MPa. Or, the shear strength between the second colloid and the fixed portion is less than the shear strength between the first colloid and the fixed portion, and less than the shear strength between the first colloid and the first main body. Or, the shear strength between the second colloid and the groove bottom wall is less than the shear strength between the first colloid and the fixed portion, and less than the shear strength between the first colloid and the first main body.

[0008] The electronic device provided in the embodiment of the present application improves the reliability of the bonding between the end of the entire display screen corresponding to the fixed portion (i.e., the wire output end of the display screen) and the middle frame by bonding the second colloid between the fixed portion of the display screen and the bottom wall of the groove of the middle frame.

[0009] In addition, by making the elastic modulus of the second colloid less than or equal to 5 MPa, when the electronic device is impacted, the second colloid has good elastic deformation performance, can absorb the impact stress, and can also undergo elastic deformation, which can prevent the first colloid from detaching from the first main body and / or the fixing part, causing the first main body to be subjected to stress and affecting the display effect.

[0010] By ensuring that the shear strength between the second colloid and the fixing portion is smaller than the shear strength between the first colloid and the fixing portion, and smaller than the shear strength between the first colloid and the first main portion; or by ensuring that the shear strength between the second colloid and the bottom wall of the groove is smaller than the shear strength between the first colloid and the fixing portion, and smaller than the shear strength between the first colloid and the first main portion, when the electronic device is impacted, the second colloid will first be separated from the fixing portion or the middle frame, thereby preventing the first colloid from being separated from the first main portion and / or the fixing portion under the action of the impact force, causing stress on the first main portion and affecting the display effect.

[0011] In some possible implementations, the display screen further includes a first chip, which is disposed on a surface of the fixing portion facing away from the first main portion. At least a portion of the second colloid is located on a side of the first chip facing the bent portion. In this manner, the second colloid adheres to the end of the fixing portion facing the bent portion, ensuring the reliability of the second colloid in adhering one end of the display screen to the bottom wall of the groove of the middle frame, while also providing a sealed protection for the first chip, thereby ensuring the reliability of the entire electronic device.

[0012] In some possible implementations, the width of the second colloid is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. This ensures that the second colloid effectively bonds the display screen to the bottom wall of the groove of the middle frame, while also preventing the space between the fixing portion and the bottom wall from being occupied and affecting the placement of other electronic components.

[0013] In some possible implementations, the second colloid is silica gel or ultraviolet light curing glue.

[0014] In some possible implementations, the display screen includes a display panel and a flexible circuit board. The display panel includes a first portion and a second portion, the first portion forming a portion of the first main body, and the second portion forming a bent portion and a fixed portion. The flexible circuit board includes a second main body and a connecting portion, the second main body being connected to an end of the fixed portion away from the bent portion, and the connecting portion being connected to an end of the second main body away from the bent portion and extending in a direction away from the bent portion. In this way, by forming a bent portion and a fixed portion on the flexible display panel, the width of the black border at the edge of the first main body can be reduced, which is beneficial to increasing the screen-to-body ratio of the electronic device, improving the display effect, and thereby improving the user experience.

[0015] In some possible implementations, a display screen includes a display panel and a flexible circuit board. The display panel forms part of a first main body. The flexible circuit board includes a second main body and a connecting portion. The second main body is connected to an edge of the display panel. The second main body forms a bent portion and a fixed portion. The connecting portion is connected to an end of the fixed portion away from the bent portion and extends away from the bent portion. In this way, forming the bent portion and fixed portion with a flexible circuit board can reduce the cost of the electronic device.

[0016] In some possible implementations, the electronic device further includes a third colloid bonded between the first main portion and the bottom wall of the groove, located on a side of the second main portion away from the bent portion, with the distance between the third colloid and the second main portion being less than or equal to 10 mm. In this way, the third colloid can further enhance the reliability of the bond between the display's cable outlet and the midframe, thereby ensuring the reliability of the entire electronic device.

[0017] In some possible implementations, the width of the third colloid is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. This allows for enhanced bonding reliability between the display's cable outlet and the midframe with less third colloid, resulting in lower costs and easier disassembly and repair. Furthermore, the width does not occupy excessive space between the first main body and the bottom wall of the slot, hindering the placement of other electronic components.

[0018] In some possible implementations, the display screen includes a display panel and a cover plate, the cover plate is stacked on the display side of the display panel, and the cover plate and at least a portion of the display panel form a part of the first main body; the cover plate includes a first outer side surface, and along the thickness direction of the display screen, the first outer side surface is arranged opposite to the bent portion. The accommodating groove includes a first groove side wall, the first groove side wall is connected to the groove bottom wall, and faces the bent portion and the first outer side surface. The electronic device also includes: a fourth colloid, the fourth colloid is bonded between the first outer side surface and the first groove side wall. In this way, the black edge of the display screen facing one end of the first groove side wall reduces the width of the bonding step surface, effectively improving the screen-to-body ratio and display effect of the display screen, thereby improving the user experience.

[0019] In some possible implementations, the electronic device further includes an ink layer disposed on the first outer side surface, and a fourth colloid bonded between the ink layer and the sidewall of the first groove. This provides a high bonding strength between the ink layer and the fourth colloid, thereby enhancing the bonding reliability between the first outer side surface and the fourth colloid, and thereby improving the reliability of the electronic device as a whole.

[0020] In some possible implementations, the shear strength between the ink layer and the fourth colloid is greater than or equal to 10 MPa. This ensures the bonding reliability between the fourth colloid and the ink layer, and further ensures the bonding reliability between the fourth colloid and the cover plate.

[0021] In some possible implementations, the first outer side surface is perpendicular to the display surface of the display screen. This facilitates the design and processing of the first outer side surface and the first groove side wall, and facilitates dispensing glue between the first outer side surface and the first groove side wall to form the fourth colloid.

[0022] In some possible implementations, the first outer side surface is inclined away from the display panel from its end closest to the display panel to its end further away from the display panel, and the angle between the first outer side surface and the display surface of the display screen is greater than or equal to 60° and less than or equal to 80°. This increases the effective bonding area between the first outer side surface and the sidewall of the first groove, further enhancing the bonding reliability between the cover plate and the middle frame, and thereby improving the reliability of the entire electronic device.

[0023] In some possible implementations, the sidewall of the first groove has an escape groove, and at least a portion of the bent portion is located within the escape groove. This can further reduce the width of the black border of the display screen toward one end of the first groove sidewall, further increasing the screen-to-body ratio of the display screen. The black border width can also be made uniform at all edges of the display screen, further improving the display quality and, in turn, enhancing the user experience.

[0024] In some possible implementations, the width of the fourth colloid along the thickness direction of the display screen is greater than or equal to 0.6 mm and less than or equal to 1 mm. This maximizes the bonding area between the first outer side surface and the first groove sidewall, ensuring reliable bonding between the first outer side surface and the first groove sidewall. Furthermore, the amount of the fourth colloid that overflows the first outer side surface can be minimized, saving costs and preventing the fourth colloid from squeezing the bent portion.

[0025] In some possible implementations, the cover plate further includes a second outer side surface, a third outer side surface, and a fourth outer side surface, wherein the first outer side surface, the second outer side surface, the third outer side surface, and the fourth outer side surface are connected end to end in sequence; the receiving groove further includes a second groove side wall, a third groove side wall, and a fourth groove side wall connected to the groove bottom wall, wherein the first groove side wall, the second groove side wall, the third groove side wall, and the fourth groove side wall are connected end to end in sequence. The electronic device further includes a fifth colloid, wherein the fifth colloid includes a first colloid segment, a second colloid segment, and a third colloid segment connected in sequence, wherein the first colloid segment is bonded between the second outer side surface and the second groove side wall, the second colloid segment is bonded between the third outer side surface and the third groove side wall, and the third colloid segment is bonded between the fourth outer side surface and the fourth groove side wall; and the fourth colloid segment is connected to the first colloid segment and the third colloid segment at both ends. In this way, the fourth colloid forms a sealed connection with the first colloid segment and the third colloid segment, thereby forming a sealed protection while bonding the cover plate and the middle frame, thereby preventing external moisture and dust from entering the electronic device and damaging the electronic components.

[0026] In some possible implementations, a portion of the fifth colloid is located on the back side of the cover plate and spaced apart from the display panel. This prevents static electricity from being transferred to the display panel through the fifth colloid, potentially causing a green screen or other display malfunction.

[0027] In some possible implementations, the electronic device further includes a sixth colloid bonded between the first main body and the bottom wall of the groove. The sixth colloid comprises a fourth, fifth, and sixth colloid segments connected in sequence. The fourth colloid segment extends in the same direction as the first colloid segment, the fifth colloid segment extends in the same direction as the second colloid segment, and the sixth colloid segment extends in the same direction as the third colloid segment. The second colloid is connected to the fourth and sixth colloid segments at both ends, respectively. In this way, the second colloid and the sixth colloid form a complete adhesive seal ring, enhancing the bonding reliability between the display and the midframe while preventing external moisture and dust from entering the electronic device and damaging electronic components.

[0028] In some possible implementations, the electronic device has a sound output channel; the second glue segment includes a first sub-glue segment and a second sub-glue segment, and the first sub-glue segment and the second sub-glue segment are respectively located on both sides of the sound output channel. The display panel includes a fifth outer side surface, and the fifth outer side surface faces the third groove side wall; the third outer side surface protrudes from the display panel, and a portion of the third groove side wall, a portion of the third outer side surface, and a portion of the fifth outer side surface form a partial side wall of the sound output channel; a portion of the fifth outer side surface and the cover plate form an angle area. The electronic device also includes a seventh colloid, and the seventh colloid is arranged in the angle area; along the extension direction of the second glue segment, the two ends of the seventh colloid are respectively connected to the first sub-glue segment and the second sub-glue segment. In this way, the fourth colloid, the fifth colloid, and the seventh colloid form a continuous and complete adhesive sealing ring, which can prevent external moisture or dust from entering the interior of the electronic device and damaging the display panel and other electronic components, thereby ensuring the reliability of the entire electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a perspective view of an electronic device provided in some embodiments of the present application;

[0030] FIG2 is a schematic diagram of the exploded structure of the electronic device shown in FIG1 ;

[0031] FIG3 is a front view of the electronic device shown in FIG1 ;

[0032] FIG4 is a cross-sectional structural diagram of the electronic device shown in FIG3 taken along line AA;

[0033] FIG5 is a front structural diagram of a portion of the electronic device shown in FIG3 ;

[0034] FIG6 is a cross-sectional structural diagram of the electronic device shown in FIG3 taken along line BB;

[0035] FIG7 is an enlarged view of point C in FIG6 ;

[0036] FIG8 is a rear structural diagram of the display screen of the electronic device shown in FIG3 ;

[0037] FIG9 is an enlarged view of point D in FIG4 ;

[0038] FIG10 is a schematic diagram of a display interface of the electronic device shown in FIG6 ;

[0039] FIG11 is another cross-sectional structural diagram of the electronic device shown in FIG3 taken along line BB;

[0040] FIG12 is an enlarged view of point E in FIG11 ;

[0041] FIG13 is a front view of a portion of the structure of the electronic device shown in FIG11;

[0042] FIG14 is a schematic diagram of a display interface of the electronic device shown in FIG11 ;

[0043] FIG15 is another cross-sectional structural diagram of the electronic device shown in FIG3 taken along line BB;

[0044] Figure 16 is an enlarged view of point F in Figure 15;

[0045] Figure 17 is an enlarged view of point G in Figure 3;

[0046] FIG18 is a cross-sectional structural diagram taken along line HH in FIG17 .

[0047] Reference Signs: 100 - electronic device; 10 - display screen; 101 - first main body; 102 - bending portion; 103 - fixing portion; 11 - cover plate; 111 - first outer side surface; 112 - second outer side surface; 113 - third outer side surface; 114 - fourth outer side surface; 12 - display panel; 121 - first portion; 122 - second portion; 123 - fifth outer side surface; 13 - back plate; 14 - first chip; 15 - flexible circuit board; 151 - second main body; 152 - connecting portion; 20 - housing; 21 - back cover; 22 - middle frame; 221 - frame; 221a - first end surface; 221b - second end surface; 221c-inner side surface; 221d-outer side surface; 2211-first frame; 2212-second frame; 2213-third frame; 2214-fourth frame; 222-middle plate; 222c-battery slot; 223-accommodation slot; 2231-slot bottom wall; 2232-first slot side wall; 2232a-step surface; 2232b-avoidance slot; 2233-second slot side wall; 2234-third slot side wall; 2235-fourth slot side wall; 30-first circuit board; 40-second circuit board; 401-USB device; 50-battery; 51-connection structure. 60-adhesive structure; 61-first adhesive; 62-second adhesive; 63-third adhesive; 64-fourth adhesive; 65-fifth adhesive; first adhesive segment 651; second adhesive segment 652; 6521-first sub-adhesive segment; 6522-second sub-adhesive segment; third adhesive segment 653; 66-sixth adhesive; 661-fourth adhesive segment; 662-fifth adhesive segment; 663-sixth adhesive segment; 67-seventh adhesive; 70-sound output channel; 80-speaker. DETAILED DESCRIPTION

[0048] In the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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.

[0049] In the embodiments of the present application, it should be understood that the directional terms mentioned, such as "up", "down", "left", "right", "inside", "outside", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0050] In the embodiments of the present application, the terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" may explicitly or implicitly include one or more of the features.

[0051] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0052] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0053] In the embodiments of this application, it should be noted that the terms "perpendicular" and "parallel" refer to approximately perpendicular and approximately parallel, respectively, within a certain tolerance range. This tolerance range may be within a range of 5°, 8°, or 10°, respectively, relative to absolute perpendicularity and absolute parallelism, and is not specifically limited herein. Furthermore, the shapes of various components described below as "rectangular," "square," etc., represent approximate shapes, and adjacent sides may or may not have rounded corners.

[0054] The present application provides an electronic device, including but 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, a wearable device, etc. Among them, the wearable device includes but is not limited to a smart bracelet, a smart watch, a smart head-mounted display, smart glasses, etc.

[0055] Please refer to Figure 1, which is a three-dimensional diagram of the electronic device 100 provided in some embodiments of the present application. This embodiment and the embodiments below are exemplified by taking the electronic device 100 as a mobile phone. The electronic device 100 is approximately in the shape of a rectangular plate. On this basis, in order to facilitate the description of the embodiments below, an XYZ coordinate system is established, and 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 can be understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the electronic device 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc., which are not specifically limited here.

[0056] Please refer to Figures 1 and 2. Figure 2 is a schematic diagram of the exploded structure of the electronic device 100 shown in Figure 1. In the embodiment shown in Figures 1 and 2, the electronic device 100 may include a display screen 10, a housing 20, a first circuit board 30, a second circuit board 40, and a battery 50. It should be understood that Figures 1 and 2 only schematically illustrate some components of the electronic device 100, and the actual shape, size, position, and configuration of these components are not limited by Figures 1 and 2.

[0057] Display screen 10 is used to display images, videos, and the like. It includes a cover plate 11 and a display panel 12. Cover plate 11 is a light-transmitting cover plate, stacked on the display side of display panel 12. Cover plate 11 primarily protects display panel 12 and prevents dust. Materials for cover plate 11 include, but are not limited to, glass. Display panel 12 is the primary component for displaying images and videos.

[0058] The housing 20 is used to protect the internal electronic components of the electronic device 100. The housing 20 may include a back cover 21 and a middle frame 22. The back cover 21 is located on the side of the display panel 12 away from the cover plate 11, and is stacked with the cover plate 11 and the display panel 12 and spaced apart.

[0059] The middle frame 22 serves as the supporting skeleton of the electronic device 100. The middle frame 22 includes a frame 221 and a middle plate 222. The frame 221 is fixed relative to the back cover 21. Specifically, the frame 221 can be fixedly connected to the back cover 21 by means of gluing, snapping, etc. In some other embodiments, the frame 221 can also be an integrally molded structure with the back cover 21, that is, the frame 221 and the back cover 21 are a single structural component. The cover plate 11 can be fixed to the frame 221. The cover plate 11, the back cover 21 and the frame 221 enclose the internal storage space of the electronic device 100. The middle plate 222 is disposed in this internal storage space and is located on the side of the display panel 12 away from the cover plate 11. The outer edge of the middle plate 222 is connected to the inner side of the frame 221, that is, the middle plate 222 is located on the inner side of the frame 221. In some examples, the outer edge of the middle plate 222 is fixed to the inner side of the frame 221 by gluing. In other examples, the middle plate 222 and the frame 221 may also be an integrally formed structure, that is, the middle plate 222 and the frame 221 are an integral structural component.

[0060] Please refer to Figures 2-4. Figure 3 is a front view of the electronic device 100 shown in Figure 1, and Figure 4 is a cross-sectional view of the electronic device 100 shown in Figure 3 taken along line AA. The middle plate 222 divides the internal storage space into two independent compartments. One compartment is located between the middle plate 222 and the back cover 21, and contains the first circuit board 30, the second circuit board 40, and the battery 50. The other compartment is located between the cover plate 11 and the middle plate 222, and contains the display panel 12. Specifically, the middle frame 22 has a storage slot 223, which is enclosed by the middle plate 222 and the frame 221. The surface of the middle plate 222 facing the display screen 10 forms the bottom wall 2231 of the storage slot 223, and the inner surface of the frame 221 on the side of the middle plate 222 facing the display screen 10 forms the side walls of the storage slot 223. At least a portion of the cover plate 11 and the display panel 12 are located within the storage slot 223, that is, at least a portion of the display screen 10 is located within the storage slot 223. In the embodiments shown in Figures 2 and 4 , the middle plate 222 is a continuous plate-like structure to facilitate fixed support of the first circuit board 30, the second circuit board 40, the battery 50, the display screen 10, etc. In other embodiments, the middle plate 222 may also be a discontinuous plate-like structure. For example, the middle plate 222 may be a frame-like structure fixed to the inner side of the frame 221. In this case, the middle plate 222 may also be referred to as an inner frame.

[0061] The first circuit board 30 may be the main circuit board of the electronic device 100. The first circuit board 30 is fixed inside the electronic device 100 and is stacked and spaced apart from the back cover 21. In the embodiment shown in FIG2 , the first circuit board 30 is fixed to the middle plate 222. In other embodiments, where the middle plate 222 of the electronic device 100 is a frame-shaped structure, the first circuit board 30 may also be fixed to the surface of the display screen 10 near the back cover 21.

[0062] The first circuit board 30 can be a rigid circuit board, a flexible circuit board, or a rigid-flexible circuit board. The first circuit board 30 can adopt an FR-4 dielectric board, a Rogers dielectric board, a mixed dielectric board of FR-4 and Rogers, and so on. Here, FR-4 is a code name for a grade of flame-retardant material, and Rogers dielectric board is a high-frequency board. The first circuit board 30 is used to set electronic components and realize electrical connection between electronic components. Among them, the electronic components can be, for example, a central processing unit (CPU), a graphics processing unit (GPU), a universal flash storage (UFS), an earpiece, a camera module, and a flash module.

[0063] The second circuit board 40 may be a secondary circuit board of the electronic device 100. The second circuit board 40 is fixed inside the electronic device 100 and is stacked and spaced apart from the back cover 21. The second circuit board 40 is spaced apart from the first circuit board along the Y-axis. In the embodiment shown in FIG2 , the second circuit board 40 is fixed to the middle plate 222. In other embodiments, where the middle plate 222 of the electronic device 100 is a frame-shaped structure, the second circuit board 40 may also be fixed to the surface of the display screen 10 near the back cover 21.

[0064] The second circuit board 40 can be a rigid circuit board, a flexible circuit board, or a combination of rigid and flexible circuit boards. The second circuit board 40 can be made of FR-4 dielectric material, Rogers dielectric material, or a hybrid of FR-4 and Rogers dielectric material. The second circuit board 40 is used to integrate a universal serial bus (USB) device 401. The USB device 401 can be a USB type-C interface device, a USB type-A interface device, a USB type Micro-B interface device, or a USB type-B interface device.

[0065] The second circuit board 40 can be electrically connected to the first circuit board 30 via a connection structure 51 to enable data and signal transmission between the second circuit board 40 and the first circuit board 30. The connection structure 51 can be a flexible circuit board. In other embodiments, the connection structure 51 can also be a conductive wire or enameled wire.

[0066] The battery 50 is fixed inside the electronic device 100. It is located between the first circuit board 30 and the second circuit board 40 along the Y-axis. The battery 50 is used to provide power to the first circuit board 30, the second circuit board 40, the display screen 10, and the like. The battery 50 can be fixed to the middle plate 222. Specifically, the middle plate 222 has a battery slot 222c on the surface facing the back cover 21, and the battery 50 is installed in this battery slot 222c. In other embodiments, if the middle plate 222 of the electronic device 100 is frame-shaped, the battery 50 can also be fixed to the surface of the display screen 10 near the back cover 21.

[0067] The battery 50 may include, but is not limited to, a nickel-cadmium battery, a nickel-metal hydride battery, a lithium battery, or other types of batteries. The number of batteries 50 may be multiple or one, and the specific number and arrangement of the batteries 50 are not limited in this application.

[0068] The structure of the middle frame 22 and the display screen 10 , as well as the assembly between the middle frame 22 and the display screen 10 , are described in detail below.

[0069] Please refer to Figure 5, which is a front view of the structure of part of the electronic device 100 shown in Figure 3. The middle frame 22 includes the aforementioned frame 221 and the aforementioned middle plate 222. The frame 221 is generally rectangular in shape, and includes a first frame 2211 and a third frame 2213 that are oppositely and spaced apart, as well as a second frame 2212 and a fourth frame 2214 that are oppositely and spaced apart. The first frame 2211 and the third frame 2213 are the short side segments of the frame 221, and the extension direction of the first frame 2211 and the third frame 2213 is parallel to the X-axis direction. The second frame 2212 and the fourth frame 2214 are the long side segments of the frame 221, and the extension direction of the second frame 2212 and the fourth frame 2214 is parallel to the Y-axis direction. The first frame 2211, the second frame 2212, the third frame 2213 and the fourth frame 2214 are connected end to end to form the frame 221.

[0070] 4 and 5 , the frame 221 includes a first end surface 221a and a second end surface 221b that are opposite to each other. The first end surface 221a and the second end surface 221b are arranged along the thickness direction of the middle frame 22, that is, the first end surface 221a and the second end surface 221b are arranged along the Z-axis direction, wherein the second end surface 221b is located on the back side of the display screen 10. The frame 221 also includes an inner side surface 221c and an outer side surface 221d that are opposite to each other. The inner side surface 221c is connected between the first end surface 221a and the second end surface 221b, and the outer side surface 221d is connected between the first end surface 221a and the second end surface 221b, and forms part of the exterior surface of the electronic device 100. The first end surface 221a, the second end surface 221b, the inner side surface 221c, and the outer side surface 221d are all annular surfaces that surround the frame 221.

[0071] Based on this, the portion of the inner side surface 221c located on the side of the middle plate 222 facing the display screen 10 forms the sidewalls of the accommodating groove 223. Specifically, the accommodating groove 223 includes a first groove sidewall 2232, a second groove sidewall 2233, a third groove sidewall 2234, and a fourth groove sidewall 2235. The first groove sidewall 2232, the second groove sidewall 2233, the third groove sidewall 2234, and the fourth groove sidewall 2235 are connected end to end. The first groove sidewall 2232 is the inner side surface of the first frame 2211 that connects to the groove bottom wall 2231, the second groove sidewall 2233 is the inner side surface of the second frame 2212 that connects to the groove bottom wall 2231, the third groove sidewall 2234 is the inner side surface of the third frame 2213 that connects to the groove bottom wall 2231, and the fourth groove sidewall 2235 is the inner side surface of the fourth frame 2214 that connects to the groove bottom wall 2231.

[0072] Please refer to Figures 3, 4, 6, and 7. Figure 6 is a cross-sectional structural diagram of the electronic device 100 shown in Figure 3 at line BB, and Figure 7 is an enlarged view of point C in Figure 6. The display screen 10 includes the aforementioned cover plate 11, the aforementioned display panel 12, a back plate 13, a first chip 14, and a flexible circuit board 15. It should be noted that Figures 4 and 6 schematically illustrate some of the film layers included in the display screen 10. The size and structure of these film layers are not limited to Figures 4 and 6. The film layers of the display screen 10 may also include, but are not limited to, flexible tape layers, polarizers, buffer layers, shielding layers, etc., and this application does not make specific limitations on this.

[0073] The cover plate 11 is generally rectangular, with its length extending parallel to the Y-axis and its width extending parallel to the X-axis. The cover plate 11 includes a first outer side surface 111, a second outer side surface 112, a third outer side surface 113, and a fourth outer side surface 114. The first outer side surface 111, the second outer side surface 112, the third outer side surface 113, and the fourth outer side surface 114 are connected end-to-end to form an annular surface surrounding the cover plate 11. The first outer side surface 111 faces the first groove sidewall 2232 of the middle frame 22, the second outer side surface 112 faces the second groove sidewall 2233 of the middle frame 22, the third outer side surface 113 faces the third groove sidewall 2234 of the middle frame 22, and the fourth outer side surface 114 faces the fourth groove sidewall 2235 of the middle frame 22.

[0074] 7 , the display panel 12 may be a flexible display panel. For example, the display panel 12 may be an organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (OLED) display panel, or a quantum dot light-emitting diode (QLED) display panel.

[0075] The display panel 12 includes a first portion 121 and a second portion 122. The first portion 121 is stacked between the back panel 13 and the cover panel 11. The back panel 13, the first portion 121, and the cover panel 11 form the first main portion 101 of the display screen 10. The first portion 121 is used to display image information. That is, the cover panel 11 is stacked on the display side of the display panel 12. The cover panel 11 and at least a portion of the display panel 12 form a portion of the first main portion 101. The second portion 122 bends from the edge of the first portion 121 toward the back of the back panel 13. A portion of the second portion 122 forms the bending portion 102, and another portion of the second portion 122 forms the fixing portion 103. The fixing portion 103 is located on the back side of the first main portion 101. The bending portion 102 is connected between the first portion 121 and the fixing portion 103, that is, the bending portion 102 is connected between the edge of the first main portion 101 and the fixing portion 103. It should be noted that the back surface of the back plate 13 refers to the surface of the back plate 13 facing away from the cover plate 11 , and the back side of the back plate 13 refers to the side of the back plate 13 facing away from the cover plate 11 .

[0076] In the embodiment shown in FIG7 , along the thickness direction (Z-axis direction) of the display screen 10, the first outer side surface 111 and the bent portion 102 are disposed opposite each other, and both face the first groove sidewall 2232 of the middle frame 22. In other embodiments, along the thickness direction of the display screen 10, the bent portion 102 may also be disposed opposite other outer side surfaces of the cover plate 11.

[0077] In some examples, the back plate 13 can be a metal structural member, for example, the material of the back plate 13 can be copper, copper alloy, steel, titanium or titanium alloy. In other examples, the back plate 13 can also be a plastic structural member, for example, the material of the back plate can be polyethylene terephthalate (PET), polyimide (PI) or polybutylene terephthalate (PBT). The back plate 13 itself has a high rigidity, so when an external force is applied along the thickness direction of the back plate 13, the back plate 13 is not prone to concave deformation. In this way, the back plate 13 can provide good support for the display panel 12, thereby ensuring that the first portion 121 of the display panel 12 has good flatness and the first portion 121 is not prone to concave deformation when subjected to an external force.

[0078] On this basis, please refer to Figures 7 and 8. Figure 8 is a rear structural diagram of the display screen 10 of the electronic device 100 shown in Figure 3. The first chip 14 is arranged on the surface of the fixed part 103 facing away from the first main body part 101, and is used to transmit a driving signal to the display screen 10 so that the first main body part 101 of the display screen 10 displays the corresponding image. In this way, when the first main body part 101 displays the picture, the black border area at the edge of the first main body part 101 can be reduced, which is conducive to increasing the screen-to-body ratio of the electronic device 100, improving the display effect, and thus improving the user experience. In some examples, the first chip 14 can be formed by wafer slicing and manufacturing, and the wafer refers to the silicon wafer used to make silicon semiconductor circuits.

[0079] The flexible circuit board 15 includes a second main portion 151 and a connecting portion 152. The second main portion 151 is connected to the end of the fixed portion 103 away from the bend 102 and is electrically connected to the first chip 14. In some examples, the second main portion 151 and the fixed portion 103 may be bonded together, and the second main portion 151 may also be bonded to the back surface of the first main portion 101. The connecting portion 152 is connected to the end of the second main portion 151 away from the bend 102 and extends away from the bend 102. The end of the connecting portion 152 away from the second main portion 151 is electrically connected to the first circuit board 30, enabling electrical signal exchange between the first chip 14 and the main circuit board. In some examples, the connecting portion 152 may be electrically connected to the first circuit board 30 via a BTB connector. In some examples, the flexible circuit board 15 may be formed as a single piece to simplify its processing.

[0080] Based on the above, please continue to refer to Figures 4, 5, and 7. The electronic device 100 also includes an adhesive structure 60, which includes a first colloid 61, a fourth colloid 64, a fifth colloid 65, and a sixth colloid 66. The first colloid 61 is bonded between the fixing portion 103 and the first main portion 101. In the embodiment shown in Figure 7, the second portion 122 of the display panel 12 forms the bending portion 103 and the fixing portion 103 of the display screen 10. Based on this, the first colloid 61 is also bonded between the second main portion 151 of the flexible circuit board 15 and the first main portion 101 of the display screen 10. In some examples, the first colloid 61 can be a backing adhesive, for example, the first colloid 61 can be a foam adhesive. In other examples, the first colloid 61 can also be a hot melt adhesive.

[0081] The fifth adhesive 65 includes a first adhesive segment 651, a second adhesive segment 652, and a third adhesive segment 653, which are sequentially connected. The first adhesive segment 651 is bonded between the second outer side surface 112 of the cover plate 11 and the second groove sidewall 2233 of the middle frame 22. The second adhesive segment 652 is bonded between the third outer side surface 113 of the cover plate 11 and the third groove sidewall 2234 of the middle frame 22. The third adhesive segment 653 is bonded between the fourth outer side surface 114 of the cover plate 11 and the fourth groove sidewall 2235 of the middle frame 22. That is, the first and third adhesive segments 651 and 653 extend parallel to the Y-axis, while the second adhesive segment 652 extends parallel to the X-axis. The fifth adhesive 65 can be a hot melt adhesive or a UV-curable adhesive. In this way, the fifth colloid 65 can bond and seal the second outer side surface 112 and the second groove side wall 2233, the third outer side surface 113 and the third groove side wall 2234, and the fourth outer side surface 114 and the fourth groove side surface 2335. It can also make the black edge of the display screen 10 smaller when the display screen 10 displays the picture, thereby improving the screen-to-body ratio and display effect, thereby improving the user experience.

[0082] On this basis, please refer to Figure 9, which is an enlarged view of point D in Figure 4. A portion of the fifth colloid 65 is located on the back side of the cover plate 11 and is spaced apart from the display panel 12. It should be noted that the back side of the cover plate 11 refers to the side of the cover plate 11 facing the back cover 21. Specifically, the height of the portion of the fifth colloid 65 located on the back side of the cover plate 11 protruding from the first outer side surface 111 toward the side close to the display panel 12 is less than or equal to 0.2 mm. For example, the height of the portion of the fifth colloid 65 located on the back side of the cover plate 11 protruding from the first outer side surface 111 toward the side close to the display panel 12 can be 0 mm or 0.5 mm or 1 mm or 1.5 mm or 2 mm. In this way, the portion of the fifth colloid 65 that overflows the cover plate 11 does not contact the display panel 12, which can prevent static electricity from being transferred to the display panel 12 through the fifth colloid 65 and causing display failures such as a green screen on the display panel 12.

[0083] Please continue to refer to Figures 4, 5, and 6. The sixth adhesive 66 is bonded between the first main body 101 and the groove bottom wall 2231 of the middle frame 22. That is, the sixth adhesive 66 is bonded between the first main body 101 and the middle plate 222. The sixth adhesive 66 includes a fourth adhesive segment 661, a fifth adhesive segment 662, and a sixth adhesive segment 663, which are connected in sequence. The fourth adhesive segment 661 extends in the same direction as the first adhesive segment 651, and the distance between the fourth adhesive segment 661 and the first adhesive segment 651 is less than or equal to 5 mm. The fifth adhesive segment 662 extends in the same direction as the second adhesive segment 652, and the distance between the fifth adhesive segment 662 and the second adhesive segment 652 is less than or equal to 5 mm. The sixth adhesive segment 663 extends in the same direction as the third adhesive segment 653, and the distance between the sixth adhesive segment 663 and the third adhesive segment 653 is less than or equal to 5 mm. In this way, the sixth colloid 66 can not only enhance the bonding reliability between the display screen 10 and the middle frame 22, but also form a seal between the first main body 101 and the middle plate 222, thereby preventing external moisture and dust from entering the interior of the electronic device 100 and damaging the electronic components.

[0084] The sixth colloid 66 may be adhesive, for example, foam adhesive. In other embodiments, the sixth colloid 66 may also be hot melt adhesive.

[0085] Based on the above, referring to FIG7 , the first groove sidewall 2232 of the receiving groove 223 of the middle frame 22 is stepped. The fourth colloid 64 is bonded between the stepped surface 2232a of the first groove sidewall 2232 and the back surface of the cover plate 11. Specifically, the fourth colloid 64 is bonded to the edge area of ​​the back surface of the cover plate 11 that is adjacent to the first outer side surface 111. In some examples, the fourth colloid 64 can be adhesive, for example, foam adhesive. In other examples, the fourth colloid 64 can also be hot melt adhesive. In this way, the fourth colloid 64 is used to achieve bonding, fixation, and sealing between the display screen 10 and the middle frame 22.

[0086] Since the end of the display screen 10 corresponding to the first groove side wall 2232 of the middle frame 22 is bonded and fixed to the middle frame 22 only by the fourth colloid 64, that is, it is bonded to the middle frame 22 only by the cover plate 11, the bonding strength is relatively weak. Once the bonding structure here fails, the display screen 10 will warp and external dust and moisture will enter the interior of the electronic device 100, causing damage to the display panel 12 and other electronic components arranged on the flexible circuit board 15, resulting in poor reliability of the entire device.

[0087] In addition, please refer to Figure 10, which is a schematic diagram of the display interface of the electronic device 100 shown in Figure 6. In order to ensure the bonding reliability between the cover plate 11 and the middle frame 22 as much as possible, the width of the fourth colloid 64 (i.e., the width along the Y-axis direction) is generally large, resulting in a larger black border width (width a in Figure 7) on the end of the display screen 10 facing the first groove sidewall 2232. In the related art, the black border width a of the display screen 10 can reach 2mm, resulting in a small screen-to-body ratio of the display screen 10, which affects the display effect of the display screen 10 and the user experience.

[0088] To address the above issues, please refer to Figures 11 and 12. Figure 11 is an alternative cross-sectional structural diagram of the electronic device 100 shown in Figure 3 taken along line BB, and Figure 12 is an enlarged view of line E in Figure 11. The embodiment shown in Figures 11 and 12 differs from the embodiment shown in Figures 6 and 7 in that the bonding structure 60 further includes a second colloid 62 and a third colloid 63. At least a portion of the second colloid 62 is bonded between the fixing portion 103 of the display screen 10 and the groove bottom wall 2231 of the middle frame 22.

[0089] In some embodiments, the elastic modulus of the second colloid 62 is less than or equal to 5 MPa. The greater the elastic modulus, the greater the rigidity of the material. That is, under a certain stress, the smaller the elastic deformation of the material. In some examples, the elastic modulus of the second colloid 62 can be 0.5 MPa or 1 MPa or 1.5 MPa or 2 MPa or 2.5 MPa or 3 MPa or 3.5 MPa or 4 MPa or 4.5 MPa or 5 MPa. In this way, when the electronic device 100 is impacted, the second colloid 62 has good elastic deformation performance, can absorb impact stress, and can also undergo elastic deformation, which can prevent the first colloid 61 from detaching from the first main body 101 and / or the fixing portion 103, causing the first main body 101 to be subjected to stress and affecting the display effect.

[0090] Based on this, in some examples, the second colloid 62 can be silica gel. In this way, the second colloid 62 has good electrical insulation performance, low elastic modulus, is not easy to age, has high adsorption performance, good thermal stability, and stable chemical properties.

[0091] In other examples, the second colloid 62 can also be a UV-curable adhesive. This makes the second colloid safe, environmentally friendly, and pollution-free. Furthermore, UV-curable adhesive cures under the irradiation of a UV lamp. Without UV irradiation during the application process, the adhesive will not cure, making cleaning or adjusting the bonding position quick and easy.

[0092] In other embodiments, the shear strength between the second colloid 62 and the fixing portion 103 is less than the shear strength between the first colloid 61 and the fixing portion 103, and is less than the shear strength between the first colloid 61 and the first main body 101. It should be noted that shear strength is one of the ways to characterize the bonding strength of the colloid. Shear strength, which can also be called dynamic shear strength, lap shear strength, etc., refers to the stress required to cause the interface between the adhesive structure (such as pressure-sensitive tape, hot melt adhesive, UV-curing tape layer, etc.) and the adherend or its vicinity to be destroyed under the action of an external force parallel to the bonding surface. The shear strength can be tested with reference to GB / T 33332-2016 "Test method for dynamic shear strength of adhesive tape". In this way, when the electronic device 100 is impacted, the second colloid 62 will first be separated from the fixing portion 103, thereby preventing the first colloid 61 from being separated from the first main body portion 101 and / or the fixing portion 103 under the action of the impact force, causing the first main body portion 101 to be subjected to stress and affecting the display effect.

[0093] In yet other embodiments, the shear strength between the second colloid 62 and the groove bottom wall 2231 of the middle frame 22 is less than the shear strength between the first colloid 61 and the fixing portion 103, and less than the shear strength between the first colloid 61 and the first main body 101. In this way, when the electronic device 100 is impacted, the second colloid 62 will first break away from the groove bottom wall 2231 of the fixing portion 103. This prevents the first colloid 61 from breaking away from the first main body 101 and / or the fixing portion 103 due to the impact, which could cause stress on the first main body 101 and affect the display effect.

[0094] In some other embodiments, the shear strength between the second colloid 62 and the fixing portion 103 is smaller than the shear strength between the first colloid 61 and the fixing portion 103, and smaller than the shear strength between the first colloid 61 and the first main portion 101; the shear strength between the second colloid 62 and the groove bottom wall 2231 of the middle frame 22 is smaller than the shear strength between the first colloid 61 and the fixing portion 103, and smaller than the shear strength between the first colloid 61 and the first main portion 101.

[0095] In some examples, the second colloid 62 may be adhesive. For example, the second colloid 62 may be foam adhesive. In other examples, the second colloid 62 may also be hot melt adhesive.

[0096] Please refer to Figures 12 and 13. Figure 13 is a front view of a portion of the electronic device 100 shown in Figure 11, excluding the first main body 101 of the display screen 10. At least a portion of the second adhesive 62 is located on the side of the first chip 14 facing the bent portion 102. In the embodiment shown in Figure 8, a portion of the second adhesive 62 is located on the side of the first chip 14 facing the bent portion 102, while other portions of the second adhesive 62 are located on the sides of the second adhesive 62 facing the second groove sidewall 2233 and the third groove sidewall 2234. In other words, the second adhesive 62 can be generally rectangular in shape. The end of the second adhesive 62 facing away from the bent portion 102 defines a first clearance groove for the first chip 14. The side of the second adhesive 62 facing the first groove sidewall 2232 can be flush with the side of the fixing portion 103 facing the first groove sidewall 2232, or it can be uneven with the side of the fixing portion 103 facing the bent portion 102. In some other embodiments, the second adhesive 62 may also be substantially in the shape of a rectangular sheet, and the entire second adhesive 62 is located on the side of the first chip 14 facing the bent portion 102 .

[0097] In this way, the second colloid 62 is adhered to the end position of the fixing portion 103 toward the bent portion 102, ensuring the reliability of the second colloid 62 adhering and fixing one end of the display screen 10 to the groove bottom wall 2231 of the middle frame 22, and can form a sealed protection for the first chip 14, thereby ensuring the reliability of the entire electronic device 100.

[0098] In the embodiment shown in Figure 13, a portion of the second colloid 62 is bonded between the fixing portion 103 and the groove bottom wall 2231 of the middle frame 22. Both ends of the second colloid 62 also extend along the extension direction of the first frame 2211. That is, another portion of the second colloid 62 is also bonded between the first main portion 101 and the groove bottom wall 2231. This provides a larger bonding area for the second colloid 62, further enhancing the reliability of bonding the display screen 10 to the groove bottom wall 2231 of the middle frame 22. Based on this, the two ends of the second colloid 62 are connected to the fourth colloid segment 661 and the sixth colloid segment 663, respectively. In this way, the second colloid 62 not only enhances the bonding reliability between the display screen 10 and the middle frame 22, but also forms a complete sealing ring with the sixth colloid 66, preventing external moisture and dust from entering the interior of the electronic device 100 and damaging the electronic components.

[0099] In other embodiments, along the extension direction of the first frame 2211, the end surfaces of the second adhesive 62 may also be flush with the end surfaces of the fixing portion 103. This facilitates controlling the overall thickness of the second adhesive 62 and simplifies the process of bonding the display screen 10 to the middle frame 22.

[0100] The width of the second colloid 62 is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. For example, the width of the second colloid 62 can be 0.5 mm, 1 mm, 1.5 mm, or 2.5 mm. It should be noted that the width of the second colloid 62 refers to the minimum width of the second colloid 62 along the Y-axis. This ensures that the second colloid 62 effectively bonds the display screen 10 to the groove bottom wall 2231 of the middle frame 22. At the same time, it does not occupy excessive space between the fixing portion 103 and the groove bottom wall 2231, thereby preventing the placement of other electronic components.

[0101] Based on the above, please continue to refer to Figures 12 and 13. The third adhesive 63 is bonded between the first main portion 101 and the groove bottom wall 2231 of the middle frame 22. That is, the third adhesive 63 is bonded between the first main portion 101 and the middle plate 222, and is located on the side of the second main portion 151 of the flexible circuit board 15 away from the bend portion 102. The distance between the third adhesive 63 and the second main portion 151 is less than or equal to 10 mm. For example, the distance between the third adhesive 63 and the second main portion 151 can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm. It should be noted that the distance between the third adhesive 63 and the second main portion 151 refers to the maximum width of the gap between the third adhesive 63 and the second main portion 151. In this way, the third colloid 63 can further enhance the bonding reliability between one end of the display screen 10 and the groove bottom wall 2231 of the middle frame 22 , thereby ensuring the reliability of the entire electronic device 100 .

[0102] In the embodiment shown in FIG13 , the third colloid 63 is in the form of a strip with approximately equal width at all locations. The extension path of the third colloid 63 is the same as the extension path of the edge of the second main body 151 away from the bend 102. The width of the third colloid 63 is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. For example, the width of the third colloid 63 can be 0.5 mm, 1 mm, 1.5 mm, or 2.5 mm. This allows for enhanced bonding reliability between the display 10 and the middle frame 22 using less third colloid 63, resulting in lower costs and easier subsequent disassembly and repair. It also does not occupy excessive space between the first main body 101 and the middle plate 222, thereby hindering the placement of other electronic components. In other embodiments, the extension path of the third colloid 63 toward the edge of the second main body 151 can be the same as the extension path of the edge of the second main body 151, and the extension path of the third colloid 63 away from the edge of the second main body 151 can be parallel to the X-axis. In this way, the bonding area of ​​the third adhesive 63 is larger, which can further enhance the bonding reliability between one end of the display screen 10 and the middle frame 22 .

[0103] In the embodiment shown in Figure 13 , the third adhesive 63 is in the form of a discontinuous strip, with two portions of the third adhesive 63 located on either side of the connecting portion 152. This facilitates flexible adjustment of the position of the connecting portion 152 to achieve electrical connection with the first circuit board 30. In other examples, the third adhesive 63 can also be in the form of a continuous strip, with portions of the third adhesive 63 bonded between the first body 101 and the connecting portion 152 of the flexible circuit board 15, or between the connecting portion 152 and the mid-plate 222.

[0104] Continuing with FIG. 13 , the ends of the third colloid 63 can be connected to the fourth colloid segment 661 and the sixth colloid segment 663 of the sixth colloid 66 , respectively. The material of the third colloid 63 can be the same as or different from that of the sixth colloid 66 . In this way, the third colloid 63 can form a complete sealing ring with the sixth colloid 66 , or another complete sealing ring with the sixth colloid 66 and the second colloid 62 , thereby enhancing the protection of the electronic components within the electronic device 100 . In some examples, the third colloid 63 can be adhesive. For example, the third colloid 63 can be foam adhesive. In other examples, the third colloid 63 can also be hot melt adhesive.

[0105] On the basis of the above, please refer back to Figure 12. The fourth colloid 64 is bonded between the first outer side surface 111 of the cover plate 11 and the first groove side wall 2232 of the middle frame 22. In some examples, the fourth colloid 64 can be a hot melt adhesive. In other examples, the fourth colloid 64 can also be a UV curing adhesive. In this way, the first outer side surface 111 of the cover plate 11 and the first groove side wall 2232 of the middle frame are bonded and sealed by the fourth colloid 64. Compared with the solution of bonding the back side of the cover plate 11 to the step surface 2232a on the first groove side wall 2232, in the embodiment shown in Figure 12, the black edge of the display screen 10 facing one end of the first groove side wall 2232 reduces the width of the bonding step surface 2232a, effectively improving the screen-to-body ratio and display effect of the display screen 10, thereby improving the user experience.

[0106] Along the thickness direction of the display screen 10, the surface of the fourth colloid 64 facing away from the bent portion 102 can be flush with the first end surface 221a of the frame 221. This improves the overall aesthetic appearance of the electronic device 100. Based on this, along the thickness direction of the display screen 10, i.e., along the Z-axis, the width of the fourth colloid 64 is greater than or equal to 0.6 mm and less than or equal to 1 mm. For example, the width of the fourth colloid 64 can be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm. This maximizes the bonding area between the first outer side surface 111 and the first groove sidewall 2232 to ensure reliable bonding between the first outer side surface 111 and the first groove sidewall 2232. Furthermore, the amount of fourth colloid 64 that overflows from the first outer side surface 111 can be minimized, saving costs and preventing the fourth colloid 64 from squeezing the bent portion 102.

[0107] Based on the above, the two ends of the fourth colloid 64 can be connected to the first and third colloid sections 651 and 653 of the fifth colloid 65, respectively. This creates a sealed connection between the fourth colloid 64 and the first and third colloid sections 651 and 653, simultaneously bonding the cover plate 11 and the middle frame 22 together and providing a protective seal to prevent external moisture and dust from entering the electronic device 100 and damaging the electronic components. Based on this, the fifth colloid 65 and the fourth colloid 64 can be integrally molded from the same material. This allows the fourth colloid 64 and the fifth colloid 65 to be integrally molded through a single adhesive dispensing and curing process, improving the assembly efficiency of the electronic device 100.

[0108] Continuing with FIG12 , the first groove sidewall 2232 of the middle frame 22 has an escape groove 2232b, and at least a portion of the bent portion 102 is located within the escape groove 2232b. The bent portion 102 may be entirely located within the escape groove 2232b, or partially located within the escape groove 2232b. The escape groove 2232b may be recessed from the first groove sidewall 2232 toward the outer side surface 211d of the frame 221. The escape groove 2232b may also be recessed from the groove bottom wall 2231 of the middle frame 22 toward the back cover 21. In other words, the groove sidewall of the escape groove 2232b may only penetrate the first groove sidewall 2232, or partially penetrate the first groove sidewall 2232 and the other partially penetrate the groove bottom wall 2231. In this way, the width b of the black border of the display screen 10 toward one end of the first groove side wall 2232 can be further reduced to less than or equal to 1 mm, further improving the screen-to-body ratio and display effect of the display screen 10, thereby improving the user experience. In addition, please refer to Figure 14, which is a schematic diagram of the display interface of the electronic device 100 shown in Figure 11. The cover plate 11 is bonded to the middle frame 22 through four outer side surfaces, and the avoidance groove 2232b avoids the bent portion 102, which can ensure that the width of the black border at the four edges of the display screen 10 is the same, thereby improving the screen-to-body ratio of the display screen 10 while improving the visual effect, thereby improving the user experience.

[0109] In the embodiment shown in FIG13 , the first outer side surface 111 of the cover plate 11 is perpendicular to the display surface of the display screen 10, that is, the first outer side surface is parallel to the Z-axis. Accordingly, the bonding area on the first groove sidewall 2232 that is bonded to the first outer side surface 111 is also perpendicular to the display surface of the display screen 10. This facilitates the design and processing of the first outer side surface 111 and the first groove sidewall 2232, as well as the dispensing of glue between the first outer side surface 111 and the first groove sidewall 2232 to form the fourth adhesive 64.

[0110] In other embodiments, please refer to Figures 15 and 16. Figure 15 is another cross-sectional structural diagram of the electronic device 100 shown in Figure 3 taken along line BB, and Figure 16 is an enlarged view of point F in Figure 15. The first outer side surface 111 is inclined away from the display panel 12 from its end closest to the display panel 12 to its end further away from the display panel 12. The angle between the first outer side surface 111 and the display surface of the display screen 10 is greater than or equal to 60° and less than or equal to 80°. That is, the angle between the first outer side surface 111 and the XY plane is greater than or equal to 60° and less than or equal to 80°. Correspondingly, the angle between the bonding area on the first groove sidewall 2232 bonded to the first outer side surface 111 and the display surface of the display screen 10 is also greater than or equal to 60° and less than or equal to 80°. For example, the angle between the first outer side surface 111 and the display surface of the display screen 10 can be 60°, 65°, 70°, 75°, or 80°. In this way, the effective bonding area between the first outer side surface 111 of the cover plate 11 and the first groove sidewall 2232 can be increased, further enhancing the bonding reliability between the cover plate 11 and the middle frame 22, thereby improving the reliability of the entire electronic device 100.

[0111] Because the cover plate 11 is relatively thin in a direction perpendicular to the display surface of the display screen 10, the effective bonding area between the first outer side surface 111 and the first groove sidewall 2232 is relatively small. Furthermore, due to the special material of the cover plate 11, the shear strength between the cover plate 11 and the fourth colloid 64 is generally relatively low (typically less than 1 MPa). Therefore, the first outer side surface 111 and the fourth colloid 64 can easily separate, causing the bonding structure between the first outer side surface 111 and the first groove sidewall 2232 to fail.

[0112] To address this issue, the adhesive structure 60 further includes an ink layer (not shown), which is disposed on the first outer side surface 111. The ink layer can be applied to the first outer side surface 111 using a screen printing process to maximize the adhesion between the ink layer and the first outer side surface 111. The ink layer can completely cover the first outer side surface 111, i.e., the outer contour of the orthographic projection of the ink layer on the first outer side surface 111 overlaps with the edge of the first outer side surface 111. In other words, in the thickness direction of the display screen 10, the width of the ink layer is the same as the width of the first outer side surface 111. In some examples, the width of the first outer side surface 111 can be greater than or equal to 0.5 mm and less than or equal to 0.6 mm; the width of the ink layer can also be greater than or equal to 0.5 mm and less than or equal to 0.6 mm. For example, the width of the ink layer can be 0.5 mm, 0.55 mm, or 0.6 mm.

[0113] Based on this, the fourth colloid 64 is bonded between the ink layer and the first groove sidewall 2232. The shear strength between the ink layer and the fourth colloid 64 is greater than or equal to 10 MPa. For example, the shear strength between the ink layer and the fourth colloid 64 can be 10 MPa, 15 MPa, 20 MPa, or 25 MPa. This provides a high bonding strength between the ink layer and the fourth colloid 64, enhancing the bonding reliability between the first outer surface 111 and the fourth colloid 64, and thereby improving the reliability of the electronic device 100.

[0114] In some other embodiments, the ink layer can also be arranged on the second outer side surface 112, the third outer side surface 113 and the fourth outer side surface 114, the first glue segment 651 is bonded between the ink layer and the second groove side wall 2233, the second glue segment 652 is bonded between the ink layer and the third groove side wall 2234, and the third glue segment 653 is bonded between the ink layer and the fourth groove side wall 2235.

[0115] Please refer to Figures 17 and 18. Figure 17 is an enlarged view of point G in Figure 3, and Figure 18 is a cross-sectional structural diagram at line HH in Figure 17. The electronic device 100 also has a speaker 80 and a sound outlet channel 70 connected to the sound outlet of the speaker 80. The display panel 12 includes a fifth outer side surface 123, and the fifth outer side surface 123 faces the third groove side wall 2234 of the middle frame 22. The third outer side surface 113 of the cover plate 11 protrudes from the display panel 12. A portion of the third groove side wall 2234, a portion of the third outer side surface 113, and a portion of the fifth outer side surface 123 form a partial side wall of the sound outlet channel 70. A portion of the fifth outer side surface 123 and the cover plate 11 form an angle area. Based on this, the seventh colloid 67 is arranged in the angle area. The second adhesive segment 652 includes a first sub-adhesive segment 6521 and a second sub-adhesive segment 6522, which are located on either side of the sound outlet channel 70. Along the extension of the second adhesive segment 652, the seventh adhesive body 67 is connected at both ends to the first sub-adhesive segment 6521 and the second sub-adhesive segment 6522, respectively. In some examples, the seventh adhesive body 67 can be connected to the portions of the first and second sub-adhesive segments 6521 and 6522 that extend beyond the third outer surface 113, respectively. In other examples, the seventh adhesive body 67 can be connected via a silicone segment bonded between the back surface of the cover plate 11 and the third groove sidewall 2234.

[0116] In this way, the fourth colloid 64 , the fifth colloid 65 and the seventh colloid 67 form a complete sealing ring, which can prevent external moisture or dust from entering the electronic device 100 and damaging electronic components, thereby ensuring the reliability of the entire electronic device 100 .

[0117] When the first main body 101 of the display screen 10 further includes a back plate 13 and other film layers (such as a polarizing layer), the seventh colloid 67 also covers the surfaces of the back plate 13 and other film layers facing and corresponding to the sound output channel 70 .

[0118] The seventh colloid 67 can be a UV-curable adhesive, which provides excellent oil resistance. For example, after 24 hours of storage in an environment with a predetermined grease coating at a temperature of 55°C and a humidity of 95%, the shear strength between the seventh colloid 67 and the back surface of the cover plate 11 and the shear strength between the seventh colloid 67 and the fifth outer side surface 123 of the display panel 12 can both be greater than or equal to 3 MPa. The predetermined grease can include oleic acid and squalene.

[0119] The above description uses the display panel 12 as an example of a flexible display panel. In other embodiments, the display panel 12 may also be a rigid display panel, and the display panel 12 forms part of the first main portion 101. The second main portion 151 of the flexible circuit board 15 is connected to the edge of the display panel 12. A portion of the second main portion 151 forms the bent portion 102, and another portion forms the fixed portion 103. The connecting portion 152 is connected to the end of the fixed portion 103 away from the bent portion 102 and extends in a direction away from the bent portion 102.

[0120] 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.

[0121] 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 them. 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 middle frame, wherein the middle frame has a receiving groove, and the receiving groove includes a groove bottom wall; A display screen, at least a portion of which is located in the receiving groove; The display screen includes a first main body, a bending portion and a fixing portion, wherein the fixing portion is located at the back side of the first main body, and the bending portion is connected between the edge of the first main body and the fixing portion; a first colloid, wherein the first colloid is bonded between the fixing portion and the first main body portion; a second colloid, at least a portion of which is bonded between the groove bottom wall and the fixing portion; Wherein, the elastic modulus of the second colloid is less than or equal to 5Mpa; or, The shear strength between the second colloid and the fixing portion is smaller than the shear strength between the first colloid and the fixing portion, and smaller than the shear strength between the first colloid and the first main body; or, The shear strength between the second colloid and the groove bottom wall is smaller than the shear strength between the first colloid and the fixing portion, and smaller than the shear strength between the first colloid and the first main body portion.

2. The electronic device according to claim 1, characterized in that: The display screen further includes a first chip, and the first chip is disposed on a surface of the fixing portion facing away from the first main body portion; At least a portion of the second colloid is located on a side of the first chip facing the bending portion.

3. The electronic device according to claim 2, characterized in that: The width of the second colloid is greater than or equal to 0.5 mm and less than or equal to 2.5 mm.

4. The electronic device according to any one of claims 1 to 3, characterized in that: The second colloid is silica gel or ultraviolet light curing glue.

5. The electronic device according to any one of claims 1 to 4, characterized in that: The display screen comprises: A display panel, the display panel comprising a first portion and a second portion, the first portion forming a portion of the first main body portion, and the second portion forming the bending portion and the fixing portion; A flexible circuit board comprises a second main body portion and a connecting portion, wherein the second main body portion is connected to an end of the fixing portion away from the bending portion, and the connecting portion is connected to an end of the second main body portion away from the bending portion and extends in a direction away from the bending portion.

6. The electronic device according to any one of claims 1 to 4, characterized in that: The display screen comprises: a display panel, the display panel forming a part of the first main body; A flexible circuit board, the flexible circuit board includes a second main body portion and a connecting portion, the second main body portion is connected to the edge of the display panel, the second main body portion forms the bending portion and the fixing portion, the connecting portion is connected to an end of the fixing portion away from the bending portion, and extends in a direction away from the bending portion.

7. The electronic device according to claim 5 or 6, characterized in that: The electronic device also includes: a third colloid, which is bonded between the first main body and the bottom wall of the groove and is located on a side of the second main body away from the bending portion, and the distance between the third colloid and the second main body is less than or equal to 10 mm.

8. The electronic device according to claim 7, characterized in that: The width of the third colloid is greater than or equal to 0.5 mm and less than or equal to 2.5 mm.

9. The electronic device according to any one of claims 1 to 8, characterized in that: The display screen includes a display panel and a cover plate, wherein the cover plate is stacked on a display side of the display panel, and the cover plate and at least a portion of the display panel form a part of the first main body; the cover plate includes a first outer side surface, and along a thickness direction of the display screen, the first outer side surface is arranged opposite to the bent portion; The receiving groove comprises a first groove side wall, the first groove side wall is connected to the groove bottom wall and faces the bending portion and the first outer side surface; The electronic device further includes: a fourth colloid, wherein the fourth colloid is bonded between the first outer side surface and the first groove side wall.

10. The electronic device according to claim 9, characterized in that: The electronic device further comprises: The ink layer is arranged on the first outer side surface, and the fourth colloid is bonded between the ink layer and the first groove side wall.

11. The electronic device according to claim 10, characterized in that: The shear strength between the ink layer and the fourth colloid is greater than or equal to 10 MPa.

12. The electronic device according to any one of claims 9 to 11, characterized in that: The first outer side surface is perpendicular to the display surface of the display screen; or, The first outer side surface is inclined in a direction away from the display panel from an end close to the display panel to an end away from the display panel, and an angle between the first outer side surface and the display surface of the display screen is greater than or equal to 60° and less than or equal to 80°.

13. The electronic device according to any one of claims 9 to 12, characterized in that: The first groove side wall has an escape groove, and at least a portion of the bent portion is located in the escape groove.

14. The electronic device according to any one of claims 9 to 13, characterized in that: Along the thickness direction of the display screen, the width of the fourth colloid is greater than or equal to 0.6 mm and less than or equal to 1 mm.

15. The electronic device according to any one of claims 9 to 14, characterized in that: The cover plate further includes a second outer side surface, a third outer side surface and a fourth outer side surface, and the first outer side surface, the second outer side surface, the third outer side surface and the fourth outer side surface are connected end to end in sequence; the accommodating groove further includes a second groove side wall, a third groove side wall and a fourth groove side wall connected to the groove bottom wall, and the first groove side wall, the second groove side wall, the third groove side wall and the fourth groove side wall are connected end to end in sequence; The electronic device also includes a fifth colloid, which includes a first glue segment, a second glue segment and a third glue segment connected in sequence, the first glue segment is bonded between the second outer side surface and the second groove side wall, the second glue segment is bonded between the third outer side surface and the third groove side wall, and the third glue segment is bonded between the fourth outer side surface and the fourth groove side wall; two ends of the fourth colloid are respectively connected to the first glue segment and the third glue segment.

16. The electronic device according to claim 15, characterized in that: A portion of the fifth colloid is located on the back side of the cover plate and is spaced apart from the display panel.

17. The electronic device according to claim 15 or 16, characterized in that: The electronic device further comprises a sixth colloid, the sixth colloid being bonded between the first main body and the bottom wall of the groove, the sixth colloid comprising a fourth colloid segment, a fifth colloid segment and a sixth colloid segment connected in sequence, the extension direction of the fourth colloid segment being the same as the extension direction of the first colloid segment, the extension direction of the fifth colloid segment being the same as the extension direction of the second colloid segment, and the extension direction of the sixth colloid segment being the same as the extension direction of the third colloid segment; The two ends of the second colloid are connected to the fourth colloid segment and the sixth colloid segment respectively.

18. The electronic device according to claim 15, characterized in that: The electronic device has a sound output channel; the second rubber segment includes a first sub-rubber segment and a second sub-rubber segment, and the first sub-rubber segment and the second sub-rubber segment are respectively located on both sides of the sound output channel; The display panel includes a fifth outer side surface, the fifth outer side surface faces the third groove side wall; the third outer side surface protrudes from the display panel, a portion of the third groove side wall, a portion of the third outer side surface and a portion of the fifth outer side surface form a partial side wall of the sound outlet channel; the portion of the fifth outer side surface and the cover plate form an angle area; The electronic device further includes a seventh colloid, which is disposed in the angle region; along the extension direction of the second rubber segment, two ends of the seventh colloid are respectively connected to the first sub-rubber segment and the second sub-rubber segment.

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