Middle frame of electronic device and processing method therefor, and electronic device

Abstract

A middle frame of an electronic device and a processing method therefor, and an electronic device. The electronic device may comprise a handheld device, a vehicle-mounted device, a wearable device and a terminal device, or is connected to any one of a wireless modem, a cellular phone, a smart phone, a personal digital assistant, a computer, a tablet computer, a laptop computer and the like. A display module of the electronic device in embodiments of the present application is located inside a first mounting cavity, and a sound channel and the first mounting cavity are relatively isolated and are not communicated with each other, so that the display module and the sound channel are also relatively isolated, which blocks media such as oil in the sound channel from contacting the display module, thereby greatly reducing the probability of occurrence of a yellow spot phenomenon and improving the overall quality of the electronic device.

Description

Middle frame of electronic equipment and processing method thereof, electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on August 29, 2023, with application number 202311102023.9, and invention name “A middle frame and processing method of an electronic device, and an electronic device”, the entire contents of which are incorporated by reference in the embodiments of this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of communication equipment, and in particular to a middle frame of an electronic device, a processing method thereof, and the electronic device. Background Art

[0003] Electronic devices are usually equipped with an earpiece, which is also called a receiver. Its main function is to convert electrical signals into sound. For example, when using an electronic device to make a call, the earpiece can transmit the other party's call voice.

[0004] Earpieces are typically installed inside electronic devices. To transmit the sound from the earpiece to the outside of the device, the device requires an audio channel. As electronic devices become increasingly versatile, the number of electronic components that comprise them increases. How to ensure smooth transmission of the earpiece sound through the audio channel while minimizing the impact on other electronic components in the device remains a key concern for those skilled in the art in electronic device design.

[0005] Summary of the Invention

[0006] Embodiments of the present application provide a middle frame of an electronic device and a processing method thereof, as well as an electronic device capable of reducing the yellow spot phenomenon.

[0007] An embodiment of the present application provides a middle frame of an electronic device, the electronic device including a display screen and a sound-emitting unit, the display screen including a transparent cover plate and a display module, and the sound-emitting unit having a sound cavity. The middle frame in the embodiment of the present application includes a partition and a peripheral wall, the peripheral wall being located circumferentially of the partition, the partition and the peripheral wall forming a first mounting cavity, the first mounting cavity being located on one side of the partition, and the first mounting cavity having an opening, the display module being able to be mounted within the first mounting cavity through the opening, the peripheral wall including a sealing surface, the transparent cover plate of the display screen being able to circumferentially sealably engaged with the sealing surface, and the peripheral wall also including a side surface located on the same side as the display screen.

[0008] In an embodiment of the present application, the middle frame is also provided with a sound channel, which includes a sound inlet and a first sound outlet. The sound inlet can be connected to the sound cavity of the earpiece, and the first sound outlet is located on the side of the peripheral wall. The sound emitted from the sound cavity of the sound unit can propagate along the sound channel and eventually diffuse from the first sound outlet on the peripheral wall to the outside of the middle frame. In the embodiment of the present application, the sound channel is relatively isolated from the first installation cavity.

[0009] In the embodiment of the present application, the display module is located within the first mounting cavity, and the sound channel is relatively isolated from the first mounting cavity, with the two not connected. This also isolates the display module from the sound channel, preventing oil and other media within the sound channel from coming into contact with the display module. This significantly reduces the likelihood of yellow spot phenomenon and improves the overall quality of the electronic device. Furthermore, the first sound outlet is located on the same side as the display screen, and thus faces the side where the display screen is located. This design aligns with the user's usual habit of holding a mobile phone, making it easier for the user to answer calls.

[0010] In one example, a step surface is further provided on one side of the opening of the peripheral wall, and at least a portion of the step surface forms a sealing surface. The transparent cover is supported on the step surface, and the transparent cover is circumferentially sealed to the step surface. The first sound outlet is located on the side of the sealing surface away from the first mounting cavity. That is, the side surface of the peripheral wall where the first sound outlet is provided is located outside the sealing surface, and the sealing surface can separate the first sound outlet and the first mounting cavity.

[0011] In this embodiment, the transparent cover is supported on the step surface, and the peripheral wall located around the transparent cover can play a role in installation and positioning. The installation and fixation reliability is relatively high. In addition, in this embodiment, the transparent cover does not protrude from the peripheral wall as much as possible, thereby improving the appearance quality of the electronic device.

[0012] In one example, along the direction of sound propagation, the sound channel includes a first hole segment and a second hole segment, and the first hole segment and the second hole segment are connected, wherein the first hole segment is at least partially located inside the partition, the sound inlet is located at the end of the first hole segment away from the second hole segment, the second hole segment is located inside the peripheral wall, and the end of the second hole segment away from the first hole segment forms a first sound outlet, and the second hole segment extends along the thickness direction of the electronic device.

[0013] In this embodiment, the sound channel includes two hole segments, which is easy to process, and the shapes and positions of the first hole segment and the second hole segment can be set according to the specific structure of the middle frame, and the setting flexibility is relatively high.

[0014] In one example, the earpiece and display are typically located on opposite sides of a partition. When the first sound outlet is located on the display side, the first hole segment can be designed as an inclined hole segment, so that the distance between the first hole segment and the plane of the display screen gradually decreases along the direction of sound propagation. This facilitates the transmission of the earpiece sound to the first sound outlet located on the display side. Furthermore, when the first hole segment is injection molded, the inclined arrangement of the first hole segment facilitates the extraction of the core used to form the first hole segment from the first hole segment to the outside of the midframe.

[0015] In one example, the sound unit is mounted offset to one side of the middle frame, so that the sound inlet on the middle frame is also offset to one side of the middle frame, that is, the sound inlet is offset to one side of the central longitudinal plane of the middle frame. The projection of the first hole segment within the plane of the display screen is also inclined, that is, the distance between the first hole segment and the central longitudinal plane gradually decreases along the direction of sound propagation. This further improves the flexibility of the arrangement of other components in the electronic device. In addition, the first hole segment can propagate the sound of the sound cavity toward the central longitudinal plane of the middle frame, which is conducive to the uniform diffusion of the sound within the second hole segment, thereby improving the quality of the sound transmitted to the outside of the electronic device.

[0016] In one example, the second hole segment includes a hole circumferential wall and a hole bottom wall, the hole bottom wall is connected to the lower end of the hole circumferential wall, the upper end of the hole circumferential wall forms a first sound outlet, the first hole segment passes through the hole circumferential wall of the second hole segment, the first hole segment is connected to the interior of the second hole segment through a connecting opening on the hole circumferential wall, the hole bottom wall is located on the side of the connecting opening away from the first sound outlet, and has a predetermined distance from the connecting opening.

[0017] That is to say, in the embodiment of the present application, the second hole segment further has a hole space below the connecting port, and the volume of the second hole segment is relatively large, which is conducive to improving the sound quality transmitted to the outside of the electronic device.

[0018] In one example, the sound channel also includes a third hole segment. Along the direction of sound propagation, the third hole segment, the first hole segment and the second hole segment are connected in sequence. The end of the third hole segment away from the first hole segment is a sound inlet. The sound inlet completely covers the sound outlet surface of the sound cavity of the earpiece. The third hole segment extends along the thickness direction of the electronic device. The third hole segment is recessed to a predetermined depth from the sound inlet toward the first mounting cavity.

[0019] In this example, the sound inlet is arranged opposite to the sound outlet surface of the sound cavity of the sound unit, and the sound inlet completely covers the sound outlet surface of the sound cavity. On the one hand, it is beneficial for the sound inside the sound cavity to enter the third hole segment. On the other hand, the first hole segment is connected to the earpiece sound cavity through the third hole segment. The third hole segment can increase the volume of the sound channel to a certain extent, which is beneficial to improving the sound quality transmitted to the outside of the electronic device.

[0020] In one example, the third hole section includes a groove bottom wall, which is opposite to the sound inlet and is roughly parallel to the plane of the display screen. In this way, the processing technology of the groove bottom wall is relatively simple and easy to implement.

[0021] In one example, the partition has a mounting surface, which is arranged on the side of the partition away from the first mounting cavity. The mounting surface is located on the periphery of the sound inlet, and the mounting surface can be sealed with the side wall on the side of the earpiece sound outlet, so that the sound in the sound cavity can completely enter the third hole segment, which is conducive to improving the intensity of the sound diffused to the outside of the electronic device. In this example, the mounting surface and the plane (xy plane) where the display screen is located have a predetermined angle. Compared with the mounting surface of the earpiece being parallel to the xy plane, in the embodiment of the present application, the mounting surface and the xy plane have a predetermined angle, so that the sound unit is in an inclined state after installation, and the end of the sound unit away from the first segment can be raised to a predetermined height toward the side of the display screen. The positive and negative springs of the sound unit can be arranged in this space, thereby reducing the overall thickness of the electronic device. In addition, the inclined mounting surface is also conducive to the smooth pulling of the core for forming the first hole segment to the outside of the middle frame.

[0022] In one example, the middle frame also includes several positioning blocks, each located circumferentially around the mounting surface. The sound unit is mounted within the space enclosed by the positioning blocks. The positioning blocks have mating portions that mate with corresponding peripheral walls of the earpiece. When the earpiece and positioning blocks are assembled, the sound cavity outlet surface of the sound unit is positioned opposite the sound inlet of the middle frame. This allows the sound emitted from the sound cavity to fully enter the sound inlet, improving the sound quality that diffuses to the outside of the electronic device. Furthermore, the positioning blocks can, to a certain extent, improve the installation reliability of the sound unit.

[0023] In one example, the middle frame at least includes a plastic body, the sound channel is located in the plastic body, and the sound channel is processed and molded on the plastic body to facilitate processing and molding.

[0024] In one example, at least the first hole section in the sound channel is integrally formed with the plastic body through an injection molding process, which eliminates the need for subsequent machining and allows for rapid molding.

[0025] In one example, the second hole segment is formed by a cutting process or a milling process, which can reduce the difficulty of injection molding.

[0026] In one example, the peripheral wall includes an outer peripheral surface, and the middle frame further includes a first sound outlet, the first sound outlet communicating with the second hole segment and the outer peripheral surface. The first sound outlet is disposed at the top of the middle frame, so that sound from the sound channel is simultaneously diffused to the outside of the middle frame through the first sound outlet and the first sound outlet, thereby achieving a three-dimensional stereo sound effect and improving the sound quality of the earpiece.

[0027] In one example, the first sound outlet is a slit structure, which is easy to process and has a good sound diffusion effect.

[0028] In one example, the sound-emitting unit includes any one of an earpiece, a speaker, or a microphone, or an integrated unit of several of them. For example, the sound-emitting unit is an integrated unit of an earpiece and a speaker, and the electronic device has a high degree of integration.

[0029] In a second aspect, an embodiment of the present application also provides an electronic device, which includes a middle frame and a display screen. The middle frame is any one of the middle frames described above. The display screen includes a transparent cover plate and a display module. The display module is located in the first mounting cavity, and the transparent cover plate is circumferentially sealed with the sealing surface.

[0030] In a third aspect, an embodiment of the present application further provides a method for processing a middle frame, wherein the middle frame includes a metal body and a plastic body, and the processing method includes:

[0031] Pre-processing the metal body and the core for forming the first hole section;

[0032] Placing the metal bodies and the cores in corresponding positions of the injection molding equipment, and forming the plastic body by the injection molding process, so that the plastic body and the metal body form an integrated structure;

[0033] Pull the core to the outside of the middle frame;

[0034] The second hole section is machined on the plastic body by using a machining process.

[0035] The electronic device provided in the embodiment of the present application includes the above-mentioned middle frame, and the processing method of the middle frame is based on the above-mentioned middle frame. Therefore, the electronic device and the processing method of the middle frame also have the above-mentioned technical effects of the middle frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic diagram of the structure of an electronic device in the current technology;

[0037] FIG2 is a partial cross-sectional view of AA in the electronic device shown in FIG1 ;

[0038] FIG3 is a partial cross-sectional view of an electronic device according to another embodiment of the current technology;

[0039] FIG4 is a schematic diagram of the adhesive arrangement between the display module and the middle frame of the electronic device shown in FIG2 , wherein the display module is not shown in the figure;

[0040] FIG5 is a schematic diagram of the adhesive arrangement between the display module and the middle frame in another electronic device of the prior art, wherein the display module is not shown in the figure;

[0041] FIG6 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0042] FIG7 is a cross-sectional view taken along line BB of the electronic device shown in FIG6 ;

[0043] FIG8 is a partial enlarged schematic diagram of point D in FIG7;

[0044] FIG9 is a partial enlarged view of point C in FIG6 ;

[0045] FIG10 is a schematic diagram of the assembly of the middle frame and the sound unit in FIG8 ;

[0046] FIG11 is a schematic diagram of the structure shown in FIG10 in the direction F', in which the sound-generating unit is hidden;

[0047] Figure 12 is a schematic diagram of GG in Figure 11;

[0048] FIG13 is a schematic diagram of the structure shown in FIG8 showing only the middle frame;

[0049] FIG14 is a schematic diagram of a middle frame with a horizontal mounting surface;

[0050] FIG15 is a schematic diagram of the middle frame shown in FIG13 with an inclined mounting surface;

[0051] FIG16 is a schematic diagram of the structure shown in FIG10 in the direction F, wherein the sound generating unit is hidden;

[0052] FIG17 is a schematic structural diagram of an electronic device provided in another embodiment of the present application;

[0053] FIG18 is a cross-sectional view taken along line HH of the electronic device shown in FIG17 ;

[0054] FIG19 is a schematic structural diagram of an electronic device in another embodiment of the present application;

[0055] FIG20 shows the approximate position of the core for forming the first hole segment.

[0056] Among them, in Figures 1 to 20:

[0057] 1 middle frame; 1a first mounting cavity; 101 peripheral wall; 1011 sealing surface; 1012 outer peripheral surface; 1013 side surface; 102 partition; 1021 positioning block; 1022 mounting surface; 1-1 metal body; 1-2 plastic body;

[0058] 2 display screen; 21 transparent cover plate; 211 extension section; 22 display module;

[0059] 3 front cameras;

[0060] 4 sound unit; 41 sound cavity; 42 circumferential outer wall;

[0061] 5. Cover plate;

[0062] 6. Adhesive glue;

[0063] 7 back cover;

[0064] 8 adhesive layer;

[0065] 12 sound channel; 121 first hole section; 122 second hole section; 1221 hole bottom wall; 1222 hole peripheral wall; 12a first sound outlet; 12b sound inlet; 123 third hole section; 1231 hole bottom wall; 1211 communication port;

[0066] 9 cores;

[0067] 10 shrapnel;

[0068] 11 Adhesive Specific embodiments

[0069] Please refer to Figure 1, which is a structural diagram of an electronic device in the current technology. The electronic device 100 in Figure 1 includes a middle frame 1, a display screen 2 and a front camera 3, and a first sound outlet 12a of a sound channel 12 connected to a sound cavity (not shown) is arranged on one side of the display screen 2.

[0070] Figures 2 and 3 show two different ways of setting up the sound channel 12 in the current technology. Figures 2 and 3 are both cross-sectional views of the position of the first sound outlet 12a in the current technology electronic device. The cross-sectional position and direction are the same as the AA cross-sectional position and direction in Figure 1. The dotted lines in Figures 2 and 3 represent the approximate propagation path of the sound of the sound unit 4, and the sound unit 4 is the earpiece. The only difference between Figures 2 and 3 is that the structure of the sound channel 12 near the earpiece is slightly different. In both Figures 2 and 3, a cover plate 5 is provided between the earpiece and the display screen to guide the transmission of sound in the sound cavity. In Figure 2, the cover plate 5 and the middle frame 1 are separate structures, and the cover plate 5 is installed on the middle frame 1, while in Figure 3, the cover plate 13 above the earpiece is an integrated structure with the middle frame 1.

[0071] As can be seen from the structure shown in Figures 2 and 3, the display screen 2 includes a fixedly connected transparent cover plate 21 and a display module 22. The display module 22 is used to display images or videos. It is formed by a number of superimposed functional layers, including a polarizing layer, a light-emitting layer, a touch layer, and a backlight layer, etc. In order to help those skilled in the art understand the composition of the display module 22, Figures 2 and 3 only illustrate three layers. Of course, the number of functional layers of the display module 22 is not limited to that shown in the figures. In current technology, the sound channel 12 is surrounded by a portion of the display module 22, a portion of the transparent cover plate 21, and the middle frame 1. A slit-type first sound outlet 12a is formed between the display screen 2 and the middle frame 1. The length of the first sound outlet 12a is approximately L, which can be understood in conjunction with the length of the middle frame 1 forming the first sound outlet 12a shown in Figures 4 and 5. Because the first sound outlet 12a is connected to the outside environment, during use of the electronic device 100, external oil can enter the electronic device 100 through the first sound outlet 12a and flow along the sound channel 12. When the oil reaches the sidewalls of the display module 22, it can easily enter between the functional layers, causing a yellow spot phenomenon and affecting the normal display of the display screen 2. Furthermore, when the oil entering through the first sound outlet 12a enters between the display module 22 and the transparent cover plate 21, the yellow spot phenomenon can also occur.

[0072] In addition, in current technology, the display module 22 is fixed to the cover plate 5 via adhesive 6. Figures 3 and 4 illustrate the arrangement of two adhesives 6 on the cover plate 5. The structure shown in Figure 4 includes two adhesives 6, and the display module 22 is bonded and fixed to the cover plate 5 via two adhesives 6. The structure shown in Figure 5 includes one adhesive 6, and the display module 22 is bonded and fixed to the cover plate 5 via one adhesive 6. The oil will flow along the edges of the adhesives 6 and the gaps 6a between the adhesives. Please understand in conjunction with Figure 1 that when the electronic device is equipped with a front camera 3, the display module 22 is provided with an opening (not shown) at the position opposite the front camera 3. When the oil flows along the adhesive to the opening, the oil will also enter between the functional layers, further expanding the area where the yellow spot phenomenon occurs. In Figures 4 and 5, the dotted line S1 represents the sound propagation path of the earpiece, and the dotted line S2 represents the flow path of oil impurities.

[0073] Therefore, how to reduce the above-mentioned macular defects is a technical problem that needs to be solved urgently by those skilled in the art.

[0074] Based on the above research findings, the inventors of the present application explored and conducted a large number of experiments, and proposed an electronic device that can effectively reduce the yellow spot phenomenon and help improve the quality of the entire device.

[0075] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present application, the embodiments of the present application are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0076] The embodiments of the present application relate to an electronic device, wherein the electronic device may include a handheld device, an in-vehicle device, a wearable device, a terminal device, or other processing device connected to a wireless modem, and may also include a cellular phone, a smart phone, a personal digital assistant (PDA), a computer, a tablet computer, a laptop computer, a video camera, a video recorder, a camera, a smart watch, a smart wristband, an augmented reality (AR) device, a virtual reality (VR) device, an in-vehicle computer, and other devices with a display screen. The embodiments of the present application do not impose any special restrictions on the specific form of the above-mentioned electronic device. For ease of understanding, the following description is based on the example of a mobile phone as the electronic device.

[0077] In order to simplify the description of the technical solution, this article defines the length direction of the electronic device as y, the width direction as x, and the thickness direction as z, where any two directions are perpendicular to each other.

[0078] Please refer to Figure 6. The middle frame 1 of the electronic device 100 provided in the embodiment of the present application mainly plays the role of supporting and protecting the electronic devices of the electronic device. Various electronic devices of the electronic device can be arranged inside the middle frame 1. The electronic devices installed inside the middle frame 1 include a mainboard, a battery module, a wireless communication module, a camera module, an audio playback module, etc. The arrangement position and installation method of these electronic devices are not specifically limited in the embodiment of the present application. Among them, the audio playback module may include sound-emitting components such as an earpiece and a speaker. It should be understood by those skilled in the art that the electronic device may include one or more of the electronic devices listed above, and of course may also include but not limited to the electronic devices listed above in this article, and may also include other electronic devices.

[0079] Referring to Figure 7, in the embodiment of the present application, the middle frame 1 includes a metal body 1-1 and a plastic body 1-2. For example, the metal body 1-1 is used as a skeleton to form a plastic body by injection molding to form a one-piece structure of the middle frame 1. The metal body 1-1 can be made of aluminum alloy, stainless steel, titanium alloy, etc., and the plastic body 1-2 can be made of polystyrene, polypropylene, polyethylene, etc. Of course, if the use requirements are met, the middle frame 1 can also include only the plastic body 1-2, and the middle frame 1 can be injection molded, or the middle frame 1 can also include only the metal body, and the middle frame 1 can be machined.

[0080] As shown in Figure 7, the electronic device 100 may also include a back cover 7. The display screen 2 and the back cover 7 are separated on both sides of the middle frame 1 along its thickness direction z. The material of the back cover 7 is not limited here. In specific practice, those skilled in the art can choose according to actual needs; for example, the back cover 7 can be made of metal, plastic, ceramic or glass, etc.

[0081] In the embodiment of the present application, the display screen 2 can be provided on the front side of the electronic device 100, or on the back side of the electronic device, or on both the front side and the back side of the electronic device 100. The front side of the electronic device 100 can be understood as the side facing the user when the user uses the electronic device 100, that is, the side where the display screen is located in FIG7 , and the back side of the electronic device 100 can be understood as the side facing away from the user when the user uses the electronic device 100.

[0082] In the embodiment of the present application, the display module 22 of the display screen 2 can adopt a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), electrophoretic display technology (E-Ink), etc. As described above, the display module 22 includes several functional layers to realize image and video display. The number and specific structure of the functional layers can be referred to the above description and current technology, and will not be described in detail here. Currently, the display screen 2 of electronic devices mostly adopts OLED. The transparent cover plate 21 covers the outside of the display module 22 and serves to protect the display module 22. The transparent cover plate 21 can be a glass cover plate, or of course it can be made of other transparent materials that can provide a protective function, for example, the transparent cover plate 21 can be transparent polyimide. The display screen 2 may also have a touch function, that is, the display screen 2 may be a touch screen.

[0083] Referring to Figures 7 and 8 , the transparent cover plate 21 in the display screen 2 completely covers the display module 22. The outer contour of the transparent cover plate 21 is larger than that of the display module 22. The transparent cover plate 21 has circumferential extensions (not numbered in the figures) extending beyond the display module 22. These extensions are supported by the middle frame 1. In one example, the middle frame 1 is provided with sealing surfaces 1011 along its circumference. The extensions of the transparent cover plate 21 support and seal against these sealing surfaces 1011. The extensions of the transparent cover plate 21 can be bonded to the sealing surfaces 1011 using an adhesive layer 8 or other adhesive component.

[0084] In the embodiment of the present application, the middle frame 1 includes a peripheral wall 101 and a partition 102, and the peripheral wall 101 is located circumferentially of the partition 102. In the embodiment of the present application, both the peripheral wall 101 and the partition 102 include a metal body 1-1 and a plastic body 1-2. One side of the partition 102 has a first mounting cavity 1a, and one side of the first mounting cavity 1a is open. The display screen 2 can be installed in the first mounting cavity 1a, wherein the display module 22 of the display screen 2 can be installed inside the first mounting cavity 1a from the opening. The transparent cover plate 21 is located at the opening position of the first mounting cavity 1a. The transparent cover plate 21 can be partially located inside the first mounting cavity 1a, and of course, the transparent cover plate 21 can also be completely located inside the first mounting cavity 1a. The partition 102 forms the bottom wall of the first mounting cavity 1a, and the peripheral wall 101 partially forms the circumferential wall of the first mounting cavity 1a. The peripheral wall 101 partially extends to the other side of the partition 102, and can form a second mounting cavity 1b on the side of the cover plate 7 for accommodating a battery, an earpiece, or other electronic devices. The transparent cover plate 21 is circumferentially sealed against the peripheral wall 101. As can be seen from the above description, in this embodiment of the present application, the display module 22 can be enclosed within the enclosed space formed by the transparent cover plate 21 and the walls of the first mounting cavity 1a. The back side of the display module 22 can be further connected to the partition 102 via adhesive 11, which can be double-sided tape, structural adhesive, or a curable liquid adhesive.

[0085] Please continue to refer to Figures 7 and 8. In the embodiment of the present application, the electronic device also includes a sound-emitting unit 4. The sound-emitting unit 4 is installed on the side of the partition 102 facing away from the display screen 2. In other words, the sound-emitting unit 4 and the display screen 2 are separated on either side of the partition 102. The sound-emitting unit 4 can be an earpiece, a speaker, or other components capable of producing sound, or an integration of several of these. In the embodiment of the present application, the sound-emitting unit 4 is taken as an example to describe the technical solution and technical effects. For mobile phones, the earpiece is usually installed near the top of the phone for easy answering. Of course, the earpiece can also be installed in other locations, depending on the specific structure of the electronic device 100. It should be noted that in the embodiment of the present application, "top" refers to the part of the electronic device that is located above the electronic device when in use. In addition to the earpiece, the front camera is usually also located near the top of the electronic device 100. The charging port of the electronic device is usually located at the end of the electronic device 100 opposite the top, that is, the charging port is located at the bottom of the electronic device 100.

[0086] The sound unit 4 typically also has two springs (one shown in the figure), which are used to electrically connect to the positive feed point and ground point of a circuit board (not shown). In other words, the two springs are respectively a positive spring and a negative spring, and are electrically connected to corresponding positions on the circuit board. The two springs are typically located on the side of the sound unit 4 closest to the cover. The circuit board can be a mainboard.

[0087] In this embodiment of the present application, the middle frame 1 also includes a sound channel 12. The sound emitted by the sound unit 4 can be transmitted along the sound channel 12 to the outside of the electronic device. In other words, the sound channel 12 is used to conduct the sound emitted by the sound unit 4 to the outside of the electronic device 100. Specifically, the two ends of the sound channel 12 are defined as a sound inlet 12b and a first sound outlet 12a. The sound inlet 12b is located inside the middle frame 1 and is used to connect to the sound cavity 41 of the sound unit 4. For example, the sound inlet 12b is located on the side of the partition 102 away from the display screen 2. The first sound outlet 12a is located on the outer surface of the middle frame 1. Specifically, the first sound outlet 12a is on the same side as the display screen 2. The first sound outlet 12a is located on the side 1013 of the peripheral wall 101, and the side 1013 is on the same side as the display screen 2. In this way, the sound in the sound cavity 41 of the sound unit 4 enters the sound channel 12 from the sound inlet 12b, propagates along the sound channel 12 to the first sound outlet 12a, and finally diffuses from the first sound outlet 12a to the outside of the electronic device 100. The size and shape of the sound inlet 12b can match the size and shape of the outlet of the sound cavity 41, which is conducive to the outward diffusion of the sound in the sound cavity 41. The first sound outlet 12a can be a slit structure, and the slit extends along the x direction, as shown in Figures 6 and 9. In order to meet the sound effect of the electronic device, the sound outlet gap of the electronic device has certain requirements. The length L1 (the length extending along the x direction) and the width w of the sound outlet gap need to be reasonably set according to the sound outlet requirements. For example, the width w of the sound outlet gap is about 0.3mm. For the case where the first sound outlet 12a forms a sound outlet gap, the width of the first sound outlet 12a is equal to the sound outlet gap. Please refer to Figure 19, where the cross-sectional position of Figure 19 in the electronic device is the same as the BB position in Figure 7. Figure 19 only shows the local structure of the cross-sectional position. In addition, the electronic device of the embodiment shown in Figure 19, except for the difference in structure between the first sound outlet 12a and the electronic device shown in Figure 7, the other structures of the electronic device shown in Figure 19 are basically the same as the electronic device shown in Figure 7, and will not be repeated herein.

[0088] When a sound outlet gap is formed between the transparent cover plate 21 and the middle frame wall 101, the width w1 of the first sound outlet 12a can be slightly larger than the sound outlet gap w. A sound outlet gap within the above width w range can minimize the entry of dust and other impurities into the gap while ensuring the sound output effect.

[0089] Of course, the first sound outlet 12a can also be a plurality of independent holes (not shown) arranged at intervals. The number of holes can be two or more, and the specific number is not limited as long as the sound output effect can be satisfied.

[0090] In the embodiment of the present application, the display module 22 is located inside the first installation cavity 1a, and the sound channel 12 is relatively isolated from the first installation cavity 1a, and the two are not connected. In this way, the display module 22 and the sound channel 12 are also relatively isolated, blocking the oil and other media inside the sound channel 12 from contacting the display module 22, thereby greatly reducing the probability of the yellow spot phenomenon and improving the overall quality of the electronic device.

[0091] In the embodiment of the present application, the first sound outlet 12a is located on the same side as the display screen 2, so that the angle θ between the main direction of sound emission of the first sound outlet 12a and the display screen 2 is less than 180°. FIG8 shows a case where the angle between the two is approximately 90°. Of course, the angle θ can also be other values, such as 70° to 150°, or other values ​​less than 180°. In the embodiment of the present application, the peripheral wall 101 has a side surface 1013, and the side surface 1013 is located on the same side as the display screen 2, and the side surface 1013 is located on the periphery of the transparent cover plate 21. The first sound outlet 12a is at least partially located on the side surface 1013, so that the direction of the first sound outlet 12a is toward the side where the display screen 2 is located. This design conforms to the user's habit of holding a mobile phone in a conventional manner, making it convenient for the user to answer the call.

[0092] Please refer to Figure 10. In the embodiment of the present application, the sound channel 12 is located inside the middle frame 1. The sound channel 12 includes a first hole segment 121 and a second hole segment 122 that are connected. The first sound outlet 12a is provided at the end of the second hole segment 122 away from the first hole segment 121. The sound inlet 12a is located at the end of the first hole segment 121 away from the second hole segment 122. The extension direction of the first hole segment 121 has an angle β with the plane xy where the display screen 2 is located, as shown in Figure 8, wherein the range of the angle β is approximately 9°. Along the direction of sound propagation, the distance between the first hole segment 121 and the display screen 2 gradually decreases. In this way, when processing the first hole segment, the processing equipment can be inserted into or withdrawn from the middle frame 1 along the extension direction of the first hole segment 121. The processing equipment can avoid other structures on the middle frame 1, thereby improving processing convenience.

[0093] The plane where the display screen described in the embodiment of the present application is located is a plane that is substantially parallel to the display surface of the display screen 2 .

[0094] The first hole section 121 can be located in the plastic body of the middle frame 1. The first hole section 121 is formed inside the plastic body through an injection molding process. In this way, the first hole section 121 is formed at the same time as the middle frame 1 is formed, and no subsequent processing is required, thereby simplifying the processing technology of the middle frame 1 and reducing the cost of using electronic equipment.

[0095] In order to facilitate pulling the core 9 for forming the first hole segment 121 to the outside of the middle frame, the first hole segment 121 may be a straight hole segment.

[0096] In the embodiment of the present application, the cross-sectional area of ​​the first hole section 121 is greater than or equal to the cross-sectional area of ​​the sound cavity 41. The cross-sectional shape of the first hole section 121 can be rectangular. For example, the cross-sectional area of ​​the sound cavity is 5mm. 2 The rectangular cross-section has dimensions of 5.2 mm x 1 mm. Of course, the dimensions of the rectangle are not limited to those described herein, as long as they meet the requirements described above. In this embodiment, the cross-section of the first hole segment 121 is rectangular, which simplifies processing. Of course, the cross-section of the first hole segment 121 is not limited to a rectangle; it can also be circular or polygonal. Although the accompanying drawings do not illustrate the cross-sectional shape of the first hole segment 121, this does not hinder the understanding of this solution by those skilled in the art.

[0097] In the embodiment of the present application, for the convenience of answering calls, the center of the first sound outlet 12a is usually located on the central longitudinal plane P of the middle frame 1 (please refer to Figure 6 for understanding), and the central longitudinal plane P is a plane passing through the midpoint of the width of the middle frame and perpendicular to the display screen 2.

[0098] Due to the layout constraints of the electronic components within the middle frame 1, the sound unit 4 is mounted offset to one side of the central longitudinal plane P. Therefore, the extension direction of the first hole segment 121 forms a predetermined angle θ1 with the plane defined by the yz axis, with θ1 ranging from 10° to 20°. Referring to Figure 12 , this indicates that the distances between the two ends of the first hole segment 121 and the central longitudinal plane P are different. The connection 1211 between the first hole segment 121 and the second hole segment 122 is closer to the central longitudinal plane than the end of the first hole segment 121 closer to the sound unit 4. In other words, the distance between the first hole segment 121 and the central longitudinal plane P gradually decreases along the direction of sound propagation.

[0099] In this way, the first hole segment 121 can propagate the sound of the sound cavity 41 toward the direction close to the central longitudinal plane P, which is conducive to uniform diffusion of the sound inside the second hole segment 122, thereby improving the sound quality diffused to the outside of the electronic device 100.

[0100] Please refer to Figure 13. In the embodiment of the present application, the second hole section 122 can be a groove structure. The second hole section 122 includes a hole circumferential wall 1222 and a hole bottom wall 1221. The outer end of the hole circumferential wall 1222 forms a first sound outlet 12a. The hole bottom wall 1221 is connected to the inner end of the hole circumferential wall 1222. The connecting port 1211 connecting the first hole section 121 and the second hole section 122 is arranged on the hole circumferential wall 12. In the embodiment of the present application, the hole bottom wall 1221 is located on the side of the connecting port 1211 away from the first sound outlet 12a, and has a predetermined distance from the connecting port 1211. In this way, the second hole section 122 also has a hole space below the connecting port 1211. The volume of the second hole section 122 is relatively large, which is conducive to improving the sound quality transmitted to the outside of the electronic device 100.

[0101] In addition, considering the use strength, when designing the first hole section 121 and the second hole section 122 , the wall thickness of the minimum thickness position of the middle frame 1 should be greater than or equal to 0.32 mm.

[0102] Please refer to Figure 13 again. In order to maximize the volume of the sound channel 12, in the embodiment of the present application, the sound channel 12 also includes a third hole segment 123. The third hole segment 123 is connected to the first hole segment 121 at a position away from the second hole segment 122. The sound inlet 12b is arranged at one end of the third hole segment 123 away from the first hole segment 121. The sound inlet 12b completely covers the sound outlet surface of the sound cavity 41. The sound inlet 12b can have the same shape as the sound outlet surface of the earpiece sound cavity 41. Of course, the sound inlet 12b on the middle frame 1 can have a different shape from the sound outlet surface of the earpiece sound cavity 41. For example, the sound inlet 12b is square, the sound outlet surface is circular, the outer contour of the square is larger than the circular shape, or the sound inlet 12b and the sound cavity 41 are other shapes. As long as the sound inlet 12b can completely cover the sound outlet surface of the sound cavity, this is conducive to the transmission of the sound of the earpiece sound cavity to the third hole segment 123. The third hole section 123 is recessed to a predetermined depth from the sound inlet toward the first mounting cavity 1a along the thickness direction (z direction) of the electronic device 100. In the embodiment of the present application, the third hole section 123 is substantially a cylindrical structure.

[0103] In the embodiment of the present application, the sound inlet 12b is arranged opposite to the sound outlet surface of the sound cavity 41 of the sound unit 4, and the sound inlet 12b completely covers the sound outlet surface of the sound cavity. On the one hand, it is beneficial for the sound inside the sound cavity 41 to enter the third hole segment 123. On the other hand, the first hole segment 123 is connected to the sound cavity 41 through the third hole segment 123. The third hole segment 123 can increase the volume of the sound channel 12 to a certain extent, which is beneficial to improving the sound quality diffused to the outside of the electronic device 100.

[0104] The bottom wall 1231 of the third hole segment 123 opposite the sound inlet can be a flat surface parallel to the plane of the display screen 2, which is easy to machine. The bottom wall 1231 of the third hole segment 123 opposite the sound inlet forms a predetermined angle with the extending direction of the first hole segment 121, and the angle is approximately equal to β.

[0105] In the embodiment of the present application, the thickness of the first section 121 of the partition 102 is relatively large. In order to reduce the thickness of the electronic device 100 as much as possible, it can be configured as follows.

[0106] Referring to Figure 13 , in this embodiment of the present application, the partition 102 has a mounting surface 1022 on the side facing away from the first mounting cavity 1a. The sound inlet 12b is located on the mounting surface 1022. After assembly, the mounting surface 1022 mates with the sidewall of the sound cavity of the sound unit 4. The mounting surface 1022 forms a predetermined angle with the plane (xy plane) of the display screen 2. This angle ɑ can range from 4° to 6°. The sound inlet 12b faces the direction of the first segment.

[0107] Compared with the mounting surface 1022 of the sound unit 4 which is parallel to the xy plane (horizontal direction in FIG13 ), in the embodiment of the present application, the mounting surface 1022 has a predetermined angle with the xy plane, so that the sound unit 4 is in an inclined state after installation, and the end of the sound unit 4 away from the first section can be raised to a predetermined height toward the side of the display screen 2, thereby reducing the overall installation height of the sound unit 4 and thereby reducing the overall thickness of the electronic device 100.

[0108] Figures 14 and 15 show the overall structure of the middle frame with two different mounting surfaces 1022. The mounting surface 1022 in Figure 14 is set to be parallel to the display screen 2, and the mounting surface 1022 in Figure 15 has a predetermined angle with the display screen 2. Obviously, the left side of the sound unit 4 in Figure 15 is raised by at least a height of h1, and there is space on the side of the sound unit 4 away from the partition 102. The positive and negative shrapnel of the sound unit 4 can be arranged in the space, making the structure of the electronic device 100 more compact, which is conducive to reducing the thickness of the electronic device 100.

[0109] In addition, the inclined setting of the mounting surface 1022 is also conducive to smoothly pulling the core 9 for forming the first hole section 121 to the outside of the middle frame 1, please refer to Figure 20 for understanding.

[0110] The mounting surface 1022 and the side wall of the sound unit 4 can be secured together using adhesive (not shown), achieving a sealed connection. This allows for simple installation and reliable securement. The adhesive can be a structural adhesive, a viscous glue that solidifies into an adhesive layer, or even double-sided tape. In one example, the mounting surface 1022 can be coated with viscous glue, and the handset can then be bonded to the mounting surface.

[0111] Please refer again to Figures 13 and 16 to understand that in this embodiment of the present application, the middle frame 1 also includes a plurality of positioning blocks 1021 located circumferentially around the mounting surface 1022. These positioning blocks 1021 enclose the mounting space 1c for the earpiece. The positioning blocks 1021 are used to mate with the corresponding circumferential outer wall 42 of the sound unit 4 for positioning. Specifically, the number of positioning blocks 1021 can be determined based on the shape of the sound unit 4, for example, three, four, or more. The shapes of the positioning blocks can be the same or different.

[0112] The positioning block 1021 can be formed simultaneously with the plastic body during the injection molding process, or after the plastic body is formed, the mating surface on the positioning block 1021 can be finely machined and formed.

[0113] The positioning block 1021 can be engaged with the corresponding structure of the circumferential outer wall 42 of the sound unit 4 to limit the position or have an interference fit, thereby further improving the reliability of the installation of the sound unit 4.

[0114] The present application also provides another embodiment of an electronic device, with reference to Figures 17 and 18 , where Figure 18 is a cross-sectional view taken along line HH of Figure 17 . The main difference between this embodiment and the embodiment shown in Figure 7 is that the electronic device shown in Figures 17 and 18 has a first sound outlet 12a' added to the outer peripheral surface 1012 of the peripheral wall. The first sound outlet 12a' connects the second hole section 122 and the outer peripheral surface 1012 of the middle frame. There can be multiple first sound outlets 12a', all of which are located at the top of the middle frame 1 and arranged along the x-direction.

[0115] In the embodiment of the present application, the sound of the sound channel 12 is diffused to the outside of the middle frame through the first sound outlet 12a and the first sound outlet 12a' at the same time, which is conducive to achieving a three-dimensional stereo sound effect and improving the sound quality of the earpiece.

[0116] The other structures in this embodiment are the same as those of the electronic device shown in FIG7 , and are not further described.

[0117] In addition, in the embodiment of the present application, the sound-emitting unit 4 can be integrated with an earpiece and a speaker at the same time. The speaker is a component that uses the principle of electroacoustic transduction to vibrate and emit sound. The sound emitted by the speaker is transmitted to the sound channel after passing through the sound cavity, and is finally diffused and transmitted to the outside of the electronic device through the first sound outlet 12a, forming the external sound of the electronic device.

[0118] As described above, the middle frame 1 may include a plastic body 1-2, and the sound channel 12 may be completely formed in the plastic body 1-2. Compared to providing the sound channel 12 on the metal body 1-1, processing the sound channel 12 on the plastic body 1-2 is easier to implement. Figures 6 and 18 of the embodiments of the present application illustrate examples in which the sound channel 12 is completely located on the plastic body.

[0119] Of course, the sound channel 12 may also have only a partial hole section formed in the plastic body 1 - 2 , such as one or both of the first hole section 121 , the second hole section 122 , or the third hole section 123 .

[0120] As described above, the first hole segment 121 in the embodiment of the present application has an angle relative to both the xy plane and the yz plane. If machining is difficult, the first hole segment 121 can be integrally formed by injection molding.

[0121] In the embodiment of the present application, the first hole segment 121 is integrally formed with the plastic body 1-2 by injection molding. Of course, if the process allows, the second hole segment 122 can also be integrally formed with the plastic body 1-2 by injection molding. Injection molding is simple and efficient for forming each hole segment.

[0122] In order to reduce the difficulty of the injection molding process, the second hole segment 122 can also be obtained by removing the material at the corresponding position of the plastic body 1-2 through a machining process after the plastic body 1-2 is formed. For example, the machining process can include a milling process or a cutting process.

[0123] After machining to remove material, burrs may remain. In order to improve the inner wall surface accuracy of the second hole segment 122, a tool such as a contoured plug with the same shape as the first hole segment 121 can be used to remove the burrs inside the second hole segment 122.

[0124] Referring to FIG. 20 , in an embodiment where the first hole segment 121 is formed by injection molding and the second hole segment 122 is machined to remove material, to ensure connectivity between the first hole segment 121 and the second hole segment 122, the core 9 used to form the first hole segment 121 can be partially positioned at the location where the second hole segment 122 is to be formed during the injection molding process. The length S of the core 9 extending into the second hole segment 122 can be approximately 0.25 mm. After the injection molding process, plastic is injected into all locations except the core. After the core is removed, the first hole segment and the location of the second hole segment 122 proximate to the first hole segment 121 are both formed with a hole structure. That is, before material is removed after the injection molding process, the first hole segment 121 and the second hole segment 122 are already connected.

[0125] For other structures of electronic devices, please refer to current technology.

[0126] Based on the above electronic device, an embodiment of the present application further provides a method for processing a middle frame, including:

[0127] S1, pre-processing the metal bodies 1-1 constituting the middle frame and the core 9 adapted to the first hole section 121;

[0128] S2. Place the metal bodies 1-1 and the core 9 in corresponding positions of the injection molding equipment, and form the plastic body 1-2 by injection molding. The plastic body 1-2 and the metal bodies 1-1 form an integrated middle frame.

[0129] A certain Z-direction gap is reserved between the core 9 and the metal body 1 - 1 to prevent the core 9 from colliding with the metal body during placement and subsequent withdrawal. The gap is approximately 0.8 mm.

[0130] S3, pulling the core 9 out of the middle frame 1;

[0131] The end of the core 9 located at the injection molding body 1-2 can be connected to an external power device, which can pull the core 9 out of the plastic body 1-2. In order to smoothly extract the core 9 to the outside of the middle frame 1, the core 9 has a single-sided draft angle of about 0.5° in the extraction direction and the z-direction.

[0132] S4. Use machining to remove materials at corresponding positions of the plastic body 1 - 2 to form the second hole section 122 and the mounting surface 1022 that matches the sound unit 4.

[0133] The second hole section 122 with a relatively small size can be cut by a relatively thin tool such as a blade.

[0134] In the above embodiment, when the mounting surface 1022 has a predetermined angle with the xy plane, the middle frame 1 can be tilted at a predetermined angle when machining the mounting surface 1022 to facilitate the extraction of the core 9 to the outside of the middle frame 1 .

[0135] In the embodiment of the present application, the processing method can form the middle frame 1 of the above structure, so the processing method of the middle frame 1 also has the above technical effects of the above middle frame 1.

[0136] In the description of this application, it should be noted that in the embodiments of this application, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of the features.

[0137] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, "connected" may refer to a removable or non-removable connection, a direct connection, or an indirect connection through an intermediary. "Fixed connection" refers to a connection in which the relative positional relationship remains unchanged after connection.

[0138] The directional terms mentioned in the embodiments of this application, such as "inside" and "outside", are only used to refer to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer description and understanding of the embodiments of this application, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of this application. In addition, unless otherwise specified in this application, the "plurality" mentioned in this application refers to two or more.

[0139] In the description of the embodiments of the present application, the terms "comprises," "includes," 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.

[0140] 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.

[0141] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A middle frame of an electronic device, the electronic device comprising a display screen and a sound unit, characterized in that: include: a partition and a peripheral wall, wherein the peripheral wall is arranged around the partition in a circumferential direction so that the middle frame forms a first installation cavity with an opening, the peripheral wall has a circumferentially arranged sealing surface, the sealing surface is used for circumferential sealing with the transparent cover plate of the display screen, and the peripheral wall also includes a side surface located on the same side as the display screen; A sound channel is used to conduct the sound of the sound unit to the outside of the middle frame. The sound channel is isolated from the first installation cavity. The sound channel includes a sound inlet and a first sound outlet. The sound inlet is used to connect to the sound cavity of the sound unit. The first sound outlet is arranged on the side.

2. The middle frame of the electronic device according to claim 1, characterized in that: The peripheral wall has a stepped surface, the sealing surface is arranged on the stepped surface, the transparent cover is supported on the stepped surface, and the first sound outlet is located on a side of the sealing surface away from the first installation cavity.

3. The middle frame of the electronic device according to claim 1, characterized in that: The sound channel includes a first hole segment and a second hole segment connected, the first hole segment is at least partially located inside the partition, the second hole segment is located inside the peripheral wall and extends along the thickness direction of the electronic device, the first sound outlet is located at the end of the second hole segment away from the first hole segment, and the sound inlet is located at the end of the first hole segment away from the second hole segment.

4. The middle frame of the electronic device according to claim 3, characterized in that: Along the sound propagation direction, the distance between the first hole segment and the plane where the display screen is located gradually decreases.

5. The middle frame of the electronic device according to claim 3 or 4, characterized in that: The sound inlet is offset to one side of the central longitudinal plane of the middle frame, and along the sound propagation direction, the distance between the first hole segment and the central longitudinal plane gradually decreases.

6. The middle frame of the electronic device according to any one of claims 3 to 5, characterized in that: The second hole segment includes a connected hole peripheral wall and a hole bottom wall, the connecting opening connecting the first hole segment and the second hole segment is arranged on the hole peripheral wall, the hole bottom wall is located on the side of the connecting opening away from the first sound outlet, and has a predetermined distance from the connecting opening.

7. The middle frame of the electronic device according to any one of claims 3 to 6, characterized in that: The sound channel also includes a third hole segment, which is connected to the first hole segment at a position away from the second hole segment. The sound inlet is arranged at an end of the third hole segment away from the first hole segment. The sound inlet completely covers the sound outlet surface of the sound cavity of the sound unit. Along the thickness direction of the electronic device, the third hole segment is recessed by a predetermined depth from the sound inlet toward the first mounting cavity.

8. The middle frame of the electronic device according to claim 7, characterized in that: The bottom wall of the groove of the third hole section opposite to the sound inlet is parallel to the plane where the display screen is located.

9. The middle frame of the electronic device according to claim 7, characterized in that: The partition has a mounting surface on one side facing away from the first mounting cavity, which is used to seal with the side wall of the sound-emitting unit located on the sound output side. The mounting surface is arranged around the sound inlet, and has a predetermined angle with the plane where the display screen is located.

10. The middle frame of the electronic device according to claim 9, characterized in that: The middle frame also includes a plurality of positioning blocks, each of which is located in the circumference of the installation surface, and all of the positioning blocks surround the installation space of the sound unit. The positioning blocks are used to cooperate with the corresponding outer peripheral wall of the sound unit for positioning so that the sound outlet surface is arranged relative to the sound inlet.

11. The middle frame of the electronic device according to any one of claims 3 to 10, characterized in that: The middle frame at least includes a plastic body, and the sound channel is located in the plastic body.

12. The middle frame of the electronic device according to claim 11, characterized in that: At least the first hole segment is integrally formed with the plastic body through an injection molding process.

13. The middle frame of the electronic device according to claim 11, characterized in that: The second hole segment is formed by a cutting process or a milling process.

14. The middle frame of the electronic device according to any one of claims 3 to 13, characterized in that: The peripheral wall includes an outer peripheral surface, and the middle frame also includes a second sound outlet, and the second sound outlet communicates with the second hole segment and the outer peripheral surface.

15. The middle frame of the electronic device according to any one of claims 1 to 14, characterized in that: The first sound outlet is a slit structure.

16. An electronic device, characterized in that: include: The middle frame of the electronic device according to any one of claims 1 to 15; The display screen comprises a transparent cover plate and a display module, wherein the display module is located in the first installation cavity, and the transparent cover plate is circumferentially sealed with the sealing surface.

17. The electronic device according to claim 16, characterized in that: The sound-emitting unit includes an earpiece, a speaker, a microphone, or an integration of several of them.

18. A method for processing a middle frame of an electronic device according to any one of claims 3 to 15, characterized in that: The middle frame includes a metal body and a plastic body, including: Pre-processing the metal body and the core for forming the first hole segment; Placing each of the metal bodies and the core at corresponding positions of an injection molding device, and molding a plastic body by an injection molding process, wherein the plastic body and the metal body form an integral structure; Pulling the core to the outside of the middle frame; The second hole segment is machined on the plastic body by using a machining process.

Images