CN111641740A

CN111641740A - Electronic device

Info

Publication number: CN111641740A
Application number: CN202010420804.2A
Authority: CN
Inventors: 刘县铎
Original assignee: Oppo Chongqing Intelligent Technology Co Ltd
Current assignee: Oppo Chongqing Intelligent Technology Co Ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-09-08
Anticipated expiration: 2040-05-18
Also published as: CN111641740B

Abstract

The application provides an electronic device, which includes: the middle frame, the rear shell and the sealing gasket; the rear shell is buckled with the middle frame, and the rear shell is provided with sound holes; the middle frame is provided with a sound transmission channel which is communicated with the sound hole; the sealed pad is located between center and backshell, wherein: the sealing gasket is provided with a through hole, and the through hole, the sound hole and the sound transmission channel are communicated; one side of the middle frame, which is close to the rear shell in the thickness direction, is provided with a positioning groove; at least part of the sealing gasket is arranged in the positioning groove so as to position the sealing gasket. Through above-mentioned structure, in the equipment process of center and backshell, can improve the fastness of sealed pad installation, reduce sealed pad and receive the backshell and scratch the probability that drops or skew after, improve electronic equipment's yields and reliability.

Description

Electronic device

Technical Field

The application relates to the technical field of electronic equipment, in particular to electronic equipment.

Background

With the increasing popularity of electronic devices, electronic devices have become indispensable social tools and entertainment tools in people's daily life. Taking a mobile phone as an example, an existing mobile phone is generally provided with an electroacoustic device, and the use of the electroacoustic device necessarily requires that a sound hole is formed in the mobile phone, and the sound hole is matched with the electroacoustic device to realize sound output and sound input of the mobile phone. However, the opening of the sound hole affects the sealing performance of the mobile phone.

At present, most mobile phones seal the internal structure of a mobile phone sound hole through foam, a PET film and a silica gel sleeve so as to ensure the tightness of the mobile phones. However, in the process of assembling the mobile phone, in order to ensure the sealing performance, the foam, the PET film and the silica gel sleeve are often scratched by the mobile phone shell, so that the foam, the PET film and the silica gel sleeve are caused to fall off or deviate, the waterproof and dustproof performance of the mobile phone is influenced, and the yield of products is reduced.

Disclosure of Invention

An aspect of an embodiment of the present application provides an electronic device, including: the middle frame, the rear shell and the sealing gasket; the rear shell is buckled with the middle frame, and a sound hole is formed in the rear shell; the middle frame is provided with a sound transmission channel, and the sound transmission channel is communicated with the sound hole; the sealing gasket is positioned between the middle frame and the rear shell, wherein: the sealing gasket is provided with a through hole, and the through hole, the sound hole and the sound transmission channel are communicated; one side of the middle frame, which is close to the rear shell in the thickness direction, is provided with a positioning groove; at least partial region of the sealing gasket is arranged in the positioning groove so as to position the sealing gasket.

The electronic equipment that this application embodiment provided, through being close to the backshell one side and seting up the constant head tank in center thickness direction, will seal up the at least part region of packing and set up in the constant head tank for sealed packing accessible constant head tank location is installed between center and backshell, in order to fill center and backshell at the sound hole and pass the interval in sound channel intercommunication region, thereby satisfied electronic equipment seal nature demand. Simultaneously, with sealed at least part region of filling up set up in the constant head tank, can also improve sealed fastness of filling up, reduce electronic equipment in the equipment process, sealed the probability that the pad is scraped by the backshell and is come off or skew, improve electronic equipment's yields and reliability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electronic device 10 provided in an embodiment of the present application;

FIG. 2 is an exploded view of the electronic device 10 of FIG. 1;

FIG. 3 is a schematic diagram of a partial cross-sectional view of the electronic device 10 of FIG. 1 taken along VI-VI;

FIG. 4 is a schematic diagram of a portion of the electronic device 10 of FIG. 1 at A;

FIG. 5 is a partial cross-sectional view of the electronic device 10 of FIG. 4 taken along XI-XI at A;

FIG. 6 is a schematic view of a portion of the structure of the middle frame 12 of FIG. 4;

FIG. 7 is a schematic view of a portion of the structure of the middle frame 12 of FIG. 4 from another perspective;

FIG. 8 is a schematic view of the construction of the gasket 14 of FIG. 4;

FIG. 9 is a schematic view showing a coupling structure of the middle frame 12 and the gasket 14 of FIG. 4;

fig. 10 is a schematic view showing a connection structure of the middle frame 12, the gasket 14 and the dust screen 15 in fig. 4;

FIG. 11 is a schematic view of another structure of the positioning slot 124 in FIG. 6;

FIG. 12 is a schematic view of another configuration of the detent 124 of FIG. 6;

FIG. 13 is a further structural schematic view of the detent 124 of FIG. 6;

FIG. 14 is a schematic view of a detent 124 in some embodiments;

fig. 15 is a schematic structural view of the dust screen 15 in fig. 10;

fig. 16 is a schematic structural diagram of the electronic device 10 according to an embodiment of the present application.

Detailed Description

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

The inventor finds that the sealing modes of most mobile phones for devices such as a microphone, a loudspeaker, a receiver and the like are generally foam sealing, silica gel sleeve sealing, PET film bonding sealing and the like, and the sealing modes can realize the sound transmission function and simultaneously have the waterproof and dustproof performances required by the mobile phones. However, the sealing gasket of most mobile phones is only attached to the rear shell or the middle frame through the back adhesive, and because the size of the sealing gasket is small, the area attached through the back adhesive is limited, and the adhesion firmness of the sealing gasket is often insufficient. In the subsequent assembling process of the mobile phone, in order to ensure the sealing performance, the sealing gasket needs to be tightly abutted against the rear shell and the middle frame. Consequently, when the backshell lock when the center, sealed pad, center and backshell three will take place to interfere, lead to setting up sealed pad between center and the backshell and receive the scratch to make sealed position of filling up to take place the skew, what more directly drops, influenced the waterproof and dustproof performance of cell-phone greatly, still reduced the yields and the reliability of cell-phone simultaneously.

In order to solve the above problem, an embodiment of the present application provides an electronic device. The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 to 2, fig. 1 is a schematic structural diagram of an electronic device 10 according to an embodiment of the present disclosure, and fig. 2 is an exploded structural diagram of the electronic device 10 in fig. 1.

As shown in fig. 1 to fig. 2, the electronic device 10 provided in the embodiment of the present application may be a portable device with a sound transmission function, such as a mobile phone, a tablet computer, a notebook computer, and a wearable device. The electronic device 10 may include: a display screen 11, a middle frame 12, a rear case 13, a gasket 14, a dust screen 15, a PCB (Printed Circuit Board) Board 16, and an electro-acoustic device 17. The display screen 11, the middle frame 12 and the rear shell 13 are arranged together to form an accommodating space 100; a gasket 14 and a dust screen 15 are provided between the middle frame 12 and the rear case 13 to seal a gap between the middle frame 12 and the rear case 13; the PCB 16 is electrically connected to the electroacoustic device 17, and both are disposed in the accommodating space 100; the electroacoustic device 17 utilizes electromagnetic induction, electrostatic induction, piezoelectric effect, or the like to perform electroacoustic conversion, thereby realizing the sound transmission function of the electronic device 10.

Specifically, the display screen 11 covers one side of the middle frame 12, and may include: the display module and be used for responding to carry out touch-control operation's circuit etc. to the display module. The display panel 11 may be a screen using an OLED (Organic Light-emitting diode) or a screen using an LCD (Liquid crystal display) to display an image. The display screen 11 may be a flat screen, a hyperboloid screen, or a four-curved screen in appearance, which is not limited in this embodiment. It should be noted that, for the mobile phone, the flat screen refers to the display 11 which is arranged in a flat plate shape on the whole; the hyperboloid screen is that the left and right edge areas of the display screen 11 are arranged in a curved shape, and other areas are still arranged in a flat shape, so that the black edge of the display screen 11 can be reduced, the visible area of the display screen 11 can be increased, and the aesthetic appearance and the holding hand feeling of the electronic device 10 can be improved; the four-curved-surface screen means that the upper edge area, the lower edge area, the left edge area and the right edge area of the display screen 11 are both in curved arrangement, and other areas are still in flat arrangement, so that the black edge of the display screen 11 can be further reduced, the visible area of the display screen 11 can be increased, and the aesthetic appearance and the holding hand feeling of the electronic device 10 can be further increased.

Referring to fig. 3 to 7, fig. 3 is a partial sectional structure diagram of the electronic device 10 in fig. 1 along vi-vi, fig. 4 is a partial structural diagram of the electronic device 10 in fig. 1 at a, fig. 5 is a partial sectional structure diagram of the electronic device 10 in fig. 4 at a along xi-xi, fig. 6 is a partial structural diagram of a middle frame 12 in fig. 4, and fig. 7 is a partial structural diagram of another view of the middle frame 12 in fig. 4.

As shown in fig. 3 to 7, the rear shell 13 is fastened to a surface of the middle frame 12 away from the display screen 11, and the three surround together to form an accommodating space 100. The accommodating space 100 can be used for installing the PCB 16 and the electroacoustic device 17, and can also be used for installing a battery, a camera, a fingerprint identification module and the like, so as to realize various functional applications of the electronic device 10. The middle frame 12 may include a frame 121 and a middle plate 122, which are integrally formed, wherein the frame 121 is formed by extending a side wall of the middle plate 122 in a thickness direction of the middle plate 122. In some embodiments, the frame 121 and the middle plate 122 may also be two separate structural members fixedly connected by bonding, welding, or inserting. The rear housing 13 may be fastened to the frame 121, so as to fixedly connect the rear housing 13 and the middle frame 12. The rear case 13 may be opened with a sound hole 131, and the sound hole 131 is disposed opposite to the bezel 121. The middle frame 12 may be opened with a sound transmission channel 123, and the sound transmission channel 123 may have a first channel port 1231 formed on a surface of the frame 121 facing the sound hole 131, and a second channel port 1232 formed on a surface of the middle plate 122 close to the rear case 13 in the thickness direction. Wherein the sound hole 131 is disposed opposite to the first passage port 1231 so that the sound hole 131 can communicate with the sound transmission passage 123. Thereby, it is possible to conduct the external sound to the inside of the electronic device 10 or conduct the sound inside the electronic device 10 to the outside through the sound hole 131 and the sound transmission passage 123.

In addition, the middle frame 12 is further provided with a positioning groove 124 and a mounting groove 125. The positioning slot 124 is disposed on a surface of the frame 121 close to the rear housing 13 in the thickness direction, and the positioning slot 124 is located at a side of the first passage port 1231 close to the rear housing 13. When the center 12 and the backshell 13 lock and scratch sealed the pad 14, the constant head tank 124 is used for fixing a position the sealed pad 14 that sets up between center 12 and backshell 13, strengthens the fastness of sealed pad 14 installation, reduces the probability that sealed pad 14 drops or deviates. The mounting groove 125 is opened around the first passage opening 1231 for mounting the gasket 14, so as to reduce a scraping area between the gasket 14 and the rear case 13, and further reduce the probability of the gasket 14 falling off or deviating.

The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.

Referring to fig. 8 to 14 in conjunction with fig. 5, fig. 8 is a schematic structural view of the gasket 14 in fig. 4, fig. 9 is a schematic structural view of a connection structure of the middle frame 12 and the gasket 14 in fig. 4, fig. 10 is a schematic structural view of the middle frame 12, the gasket 14 and the dust screen 15 in fig. 4, fig. 11 is a schematic structural view of another positioning groove 124 in fig. 6, fig. 12 is a schematic structural view of another positioning groove 124 in fig. 6, fig. 13 is a schematic structural view of another positioning groove 124 in fig. 6, fig. 14 is a schematic structural view of a positioning groove 124 in some embodiments, and fig. 15 is a schematic structural view of the dust screen 15 in fig. 10.

As shown in fig. 8 to 10, the sealing pad 14 may be made of flexible materials such as silicone, foam, and rubber, and has strong waterproof and dustproof performance. Meanwhile, when the electronic device 10 is subjected to external impact, a certain buffering effect can be achieved. In the present embodiment, the gasket 14 is located between the frame 121 of the middle frame 12 and the rear case 13, and is located in a region where the sound transmission passage 1231 and the sound hole 131 communicate with each other. The sealing pad 14 has a through hole 141, the through hole 141 is connected to the sound transmission channel 1231 and the sound hole 131, and at least a portion of the sealing pad 14 is disposed in the positioning groove 124. Due to design tolerances of the two structural members of the middle frame 12 and the rear housing 13, a certain amount of clearance is often formed between the two structural members. Therefore, the sound hole 131 of the rear housing 13 is not only communicated with the sound transmission channel 123 of the middle frame 12, but also communicated with the gap between the rear housing 13 and the frame 122, so that external water stains and dust can enter the gap between the rear housing 13 and the frame 122 through the sound hole 131, and enter other internal spaces of the electronic device 10 through the gap. The gasket 14 of this embodiment is used to fill up the gap between the frame 121 and the rear housing 13 in the communication area between the sound hole 131 and the sound transmission channel 123, so that the sound hole 131 can only communicate with the sound transmission channel 123 through the through hole 141, thereby enhancing the sealing performance of the electronic device 10.

Specifically, the gasket 14 may include the positioning portion 142 and the filling portion 143 of an integral structure. The positioning portion 142 is disposed in the positioning slot 124 of the middle frame 12, and the shape of the positioning portion 142 is matched with the shape of the positioning slot 124. For example, in the present embodiment, the positioning slot 124 may be shaped as a dovetail groove, and the positioning portion 142 may be in interference fit with the positioning slot 124. When the gasket 14 is scratched by the rear housing 12 in the fastening direction X, the positioning groove 124 is a dovetail groove, and the positioning portion 142 is in interference fit with the positioning groove 124. Therefore, the positioning portion 142 is forced to be caught in the positioning groove 124, so as to position the gasket 14, and reduce the probability that the gasket 14 is separated or deviated after being scratched by the rear case 12. Further, the inner wall of the positioning groove 124 can be coated with a gum 1241, the positioning portion 142 is fixed in the positioning groove 124 through the gum 1241, the connection firmness of the positioning portion 142 and the positioning groove 124 is enhanced, and the probability that the sealing gasket 14 is separated or deviated after being scratched by the rear shell 12 is further reduced.

As shown in fig. 11 to 14, in some embodiments, the shape of the positioning slot 124 may also be a T-shaped slot or an L-shaped slot, or a combination of a T-shaped slot and a dovetail slot, and it is only necessary that the shape of the positioning portion 142 is matched with the shape of the positioning slot 124 and can be fixed in the positioning slot 124, which is not limited in this embodiment. In some embodiments, the positioning post 1211 may be disposed on a surface of the frame 121 opposite to the rear case 13 in the positioning groove 124, and the positioning post 1211 is disposed through the positioning portion 142, so as to further enhance the firmness of the connection between the positioning portion 142 and the positioning groove 124 and reduce the probability of the gasket 14 being separated or deviated after being scratched by the rear case 12. The number of the positioning posts 1211 can be specifically set according to the actual size of the positioning slot 124, which is not limited in this embodiment.

As shown in fig. 5 and 8, a filling part 143 is disposed in the mounting groove 125, and the filling part 143 is used to seal a gap between the rim 121 and the rear case 13. Wherein the filling part 143 is disposed around the first passage port 1231 to form the through hole 141 so that the sound hole 131 can communicate with the sound transmission passage 1231 only through the through hole 141. In this embodiment, the filling portion 143 may specifically include a body 1431 and a protruding wall 1432. The body 1431 may be attached to the mounting groove 125 by a double-sided adhesive tape, and is flush with the surface of the frame 121 near the sound hole 131, so as to reduce the area of the rear case 13 scraping the sealing pad 14. In some embodiments, the thickness of the body 1431 may be less than that of the mounting groove 125, and only when the middle frame 12 and the rear shell 13 are fastened, the rear shell 13 may not be scratched to the body 1431. The protruding wall 1432 is disposed on a surface of the body 1431 close to the rear housing 13 and abuts against the rear housing 13, and the protruding wall 1432 is disposed around the first passage opening 1231. Through protruding wall 1432 and backshell 13 butt matched with mode for filling portion 143 can also reduce the area of scraping of backshell 13 to filling portion 143 when can filling up the clearance between center 12 and backshell 13 and guarantee electronic equipment 10 leakproofness, reduces the sealed probability that 14 drops or deviate after receiving backshell 13 to scrape.

As shown in fig. 15, the dust-proof net 15 may be covered on the first passage port 1231 to separate the sound hole 131 and the sound transmission passage 123, so that dust entering from the sound hole 131 can be blocked at the dust-proof net 15 to prevent the sound transmission passage 123 from being blocked by dust. The dust screen 15 is further provided with a dust hole 151 to communicate the sound transmission channel 123 with the sound hole 131. For example, in the present embodiment, the area of the protruding wall 1432 of the filling portion 143 surrounding the first passage opening 1231 is larger than the area of the body 1431 surrounding the first passage opening 1231, so that the dust screen 15 can be attached to the area of the body 1431 exposed near the first passage opening 1231, and the dust screen 15 can be fixedly mounted. Meanwhile, the protruding wall 1432 may also be disposed around the dust screen 15 and be in interference fit with the dust screen 15, so as to enhance the firmness of the dust screen 15.

As shown in fig. 3, the PCB 16 and the electroacoustic device 17 are disposed in the accommodating space 100. The PCB 16 is disposed on one surface of the middle plate 122 close to the rear case 13 in the thickness direction, and covers the second opening 1232 of the sound transmission channel 123. The electroacoustic device 17 is disposed on a surface of the PCB 16 close to the rear housing 13, and electrically connected to the PCB 16. The PCB 16 is opened with an opening 161, and the opening 161 penetrates the PCB 16 in the thickness direction of the PCB 16 and is communicated with the second passage 1232. The electroacoustic device 17 is covered on the opening 161, so that the electroacoustic device 17 is communicated with the sound transmission channel 123, and the electroacoustic device 17 can perform corresponding work through the sound transmission channel 123. In the present embodiment, the electroacoustic device 17 may be any one of a microphone, a speaker, and a receiver. In some embodiments, the electroacoustic device 17 may also be another device that needs the sound transmission channel 123 to operate, which is not limited in this embodiment.

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Further, referring to fig. 16, fig. 16 is a schematic structural composition diagram of the electronic device 10 according to the embodiment of the present application. As shown in fig. 16, the electronic device 10 provided in the embodiment of the present application may further include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the display screen 11 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980, a power supply 990, and the like. Wherein the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected with the processor 980; the power supply 990 is used to supply power to the entire terminal apparatus 900.

Specifically, the RF circuit 910 is used for transmitting and receiving signals; the memory 920 is used for storing data instruction information; the input unit 930 is used for inputting information, and may specifically include a touch panel 931 and other input devices 932 such as operation keys; the display unit 940 may include a display panel 941; the sensor 950 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; a speaker 961 and a microphone (or microphone, or electroacoustic device 17 in the above embodiments) 962 are coupled to the processor 980 via audio circuitry 960 for emitting and receiving sound signals; the wifi module 970 is used for receiving and transmitting wifi signals, and the processor 980 is used for processing data information of the mobile terminal device.

The electronic device 10 that this application embodiment provided, through set up constant head tank 124 near one side of backshell 13 in center 12 thickness direction, set up sealed 14 at least part region in constant head tank 124 for sealed 14 accessible constant head tank 124 location is installed between center 12 and backshell 13, in order to fill up center 12 and backshell 13 in the interval of sound hole 131 and sound transmission channel 123 intercommunication region, thereby satisfied electronic device 10 leakproofness demand. Meanwhile, at least partial region of the sealing gasket 14 is arranged in the positioning groove 124, the firmness of the sealing gasket 14 can be improved, and the probability that the sealing gasket 14 is scratched to fall off or deviate by the rear shell 13 in the assembling process of the electronic device 10 is reduced. Further, the installation groove 125 is formed in the side, close to the sound holes 131, of the middle frame 12, so that the sealing gasket 14 can be arranged in the installation groove 125, the area of the sealing gasket 14 scratched by the rear shell 13 is reduced, the probability that the sealing gasket 14 is scratched by the rear shell 13 to fall off or deviate is reduced again, and the yield and the reliability of the electronic device 10 are improved.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. An electronic device, characterized in that the electronic device comprises: the middle frame, the rear shell and the sealing gasket;

the rear shell is buckled with the middle frame, and a sound hole is formed in the rear shell;

the middle frame is provided with a sound transmission channel, and the sound transmission channel is communicated with the sound hole;

the sealing gasket is positioned between the middle frame and the rear shell, wherein:

the sealing gasket is provided with a through hole, and the through hole, the sound hole and the sound transmission channel are communicated;

one side of the middle frame, which is close to the rear shell in the thickness direction, is provided with a positioning groove;

at least partial region of the sealing gasket is arranged in the positioning groove so as to position the sealing gasket.

2. The electronic device of claim 1, wherein the acoustic channel comprises: a first passage opening and a second passage opening;

the first passage opening is arranged towards the sound hole, and the second passage opening is arranged towards the rear shell in the thickness direction of the middle frame;

the sealing gasket comprises a positioning part and a filling part which are of an integrated structure;

the positioning part is arranged in the positioning groove;

the filling part is arranged around the first channel port to form the through hole communicated with the sound transmission channel; the filling part is used for filling a gap between the middle frame and the rear shell.

3. The electronic device according to claim 2, wherein the positioning groove has a shape of any one of a dovetail groove, a T-shaped groove, and an L-shaped groove; wherein, the shape looks adaptation of location portion and constant head tank.

4. The electronic device of claim 3, wherein an inner wall of the positioning groove is coated with a back adhesive, and the positioning portion is fixed in the positioning groove through the back adhesive.

5. The electronic device according to claim 2, wherein the middle frame further defines a mounting groove, and the mounting groove is defined around the first passage opening; the filling part is arranged in the mounting groove.

6. The electronic device according to claim 5, wherein the filling part includes a body and a convex wall;

the body is arranged in the mounting groove;

the convex wall is arranged on one surface of the body close to the rear shell and is abutted against the rear shell; wherein:

the convex wall is also disposed around the first passage opening.

7. The electronic device of claim 2, further comprising a dust screen;

the dustproof net cover is arranged at the first passage opening;

the filling part is provided around the dust screen to fix the dust screen.

8. The electronic device of claim 2, further comprising: a PCB board and an electroacoustic device;

the PCB is arranged on one surface of the middle frame, which is close to the rear shell in the thickness direction, and covers the second passage opening; wherein:

the PCB is provided with an opening, and the opening penetrates through the PCB in the thickness direction of the PCB and is communicated with the second passage opening;

the electroacoustic device is arranged on the PCB close to one surface of the rear shell, and the electroacoustic device is also covered on the opening.

9. The electronic device of claim 8, wherein the electroacoustic device is any one of a microphone, a speaker and a receiver.

10. The electronic device of claim 1, further comprising a display screen, wherein the display screen covers a surface of the middle plate facing away from the rear housing in the thickness direction.