CN111641740A - Electronic equipment - Google Patents

Abstract

The application provides an electronic device, the electronic device includes: a middle frame, a rear shell and a gasket; the rear shell is fastened to the middle frame, and the rear shell is provided with a sound hole; the middle frame is provided with a sound transmission channel, and the sound transmission The channel is communicated with the sound hole; the gasket is located between the middle frame and the rear shell, wherein: the gasket is provided with a through hole, and the through hole, the sound hole and the sound transmission channel are connected; the middle frame is close to the side of the rear shell in the thickness direction A positioning groove is provided; at least part of the sealing gasket is arranged in the positioning groove to locate the sealing gasket. Through the above structure, during the assembling process of the middle frame and the rear case, the installation firmness of the gasket can be improved, the probability of the gasket falling off or deviated after being scratched by the rear case can be reduced, and the yield and reliability of the electronic device can be improved.

Description

Electronic equipment

technical field

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

Background technique

With the continuous popularization of electronic devices, electronic devices have become indispensable social tools and entertainment tools in people's daily life. Taking mobile phones as an example, existing mobile phones are generally equipped with electro-acoustic devices, and the use of electro-acoustic devices necessarily requires sound holes on the mobile phone, and the sound holes and electro-acoustic devices cooperate to realize the sound output and input of the mobile phone. However, opening the sound hole will affect the airtightness of the mobile phone.

At present, most mobile phones use foam, PET film and silicone sleeve to seal the internal structure of the sound hole of the mobile phone to ensure the airtightness of the mobile phone. However, during the assembly process of the mobile phone, in order to ensure the airtightness, the foam, PET film and silicone cover are often scratched by the mobile phone case, causing the foam, PET film and silicone cover to fall off or deviate, thus affecting the mobile phone. The waterproof and dustproof performance also reduces the yield of the product.

SUMMARY OF THE INVENTION

One aspect of the embodiments of the present application provides an electronic device, the electronic device includes: a middle frame, a rear shell, and a gasket; the rear shell is fastened to the middle frame, and a sound hole is opened in the rear shell; The middle frame is provided with a sound transmission channel, and the sound transmission channel communicates with the sound hole; the sealing gasket is located 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 connected; the middle frame is provided with a positioning groove on the side of the middle frame close to the rear shell in the thickness direction; into the positioning groove to position the gasket.

In the electronic device provided by the embodiments of the present application, by opening a positioning groove on the side of the middle frame close to the rear shell in the thickness direction, the sealing gasket is disposed in the positioning groove at least in part, so that the sealing gasket can be positioned and installed on the middle frame and the rear casing through the positioning groove. between the shells to fill the gap between the middle frame and the rear shell in the connection area between the sound hole and the sound transmission channel, so as to meet the airtightness requirements of electronic equipment. At the same time, disposing at least part of the sealing gasket in the positioning groove can also improve the firmness of the sealing gasket, reduce the probability of the sealing gasket being scraped off or deviated by the rear shell during the assembly process of electronic equipment, and improve the yield of electronic equipment. and reliability.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

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

FIG. 2 is a schematic diagram of an exploded structure of the electronic device 10 in FIG. 1;

FIG. 3 is a partial cross-sectional structural diagram of the electronic device 10 in FIG. 1 along VI-VI;

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

FIG. 5 is a schematic partial cross-sectional structure diagram of the electronic device 10 in FIG. 4 along the line XI-XI;

Fig. 6 is a partial structural schematic diagram of middle frame 12 in Fig. 4;

FIG. 7 is a partial structural schematic diagram of the middle frame 12 in FIG. 4 from another perspective;

FIG. 8 is a schematic structural diagram of the gasket 14 in FIG. 4;

FIG. 9 is a schematic diagram of the connection structure of the middle frame 12 and the gasket 14 in FIG. 4;

FIG. 10 is a schematic diagram of the connection structure of the middle frame 12, the gasket 14 and the dust filter 15 in FIG. 4;

Fig. 11 is another structural schematic diagram of the positioning groove 124 in Fig. 6;

Fig. 12 is another structural schematic diagram of the positioning groove 124 in Fig. 6;

Fig. 13 is another structural schematic diagram of the positioning groove 124 in Fig. 6;

FIG. 14 is a schematic structural diagram of the positioning groove 124 in some embodiments;

FIG. 15 is a schematic structural diagram of the dust filter 15 in FIG. 10;

FIG. 16 is a schematic structural composition diagram of an electronic device 10 provided by an embodiment of the present application.

Detailed ways

"Electronic equipment" (or simply "terminal") as used herein includes, but is not limited to, is configured to be connected via a wired line (eg, via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, Direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters , and/or another communication terminal's) wireless interface to receive/send communication signals. A communication terminal arranged to communicate through 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; Personal Communication System (PCS) terminals that may combine cellular radio telephones with data processing, fax, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet access , a PDA with a web browser, memo pad, calendar, and/or a global positioning system (GPS) receiver; and conventional laptop and/or palm receivers or other electronic devices including radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

After long-term research by the inventor, it is found that most mobile phones generally use foam sealing, silicone sleeve sealing, PET film bonding and sealing for devices such as microphones, speakers and receivers. Water and dust resistance required for mobile phones. However, the gaskets of most mobile phones are only attached to the rear case or middle frame through the back glue, and due to the small size of the gaskets, the bonding area through the back glue is limited, which often leads to insufficient bonding reliability of the gaskets. . In the subsequent assembly process of the mobile phone, in order to ensure the airtightness, the gasket needs to be tightly pressed against the rear case and the middle frame. Therefore, when the rear case is fastened to the middle frame, there will be interference among the gasket, the middle frame, and the rear case, causing the gasket disposed between the rear case and the middle frame to be scratched, so that the sealing The position of the pad is shifted, or even falls off directly, which greatly affects the waterproof and dustproof performance of the mobile phone, and also reduces the yield and reliability of the mobile phone.

In order to solve the above problem, an embodiment of the present application provides an electronic device. The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some of the embodiments of the present application, but not all of the embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Reference in this application 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 application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Please refer to FIGS. 1 to 2 . FIG. 1 is a schematic structural diagram of an electronic device 10 provided by an embodiment of the present application, and FIG. 2 is a schematic exploded structural schematic diagram of the electronic device 10 in FIG. 1 .

As shown in FIGS. 1 to 2 , the electronic device 10 provided in this embodiment of the present application may specifically 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 filter 15 , a PCB (Printed Circuit Board, printed circuit board) board 16 and an electro-acoustic device 17 . Among them, the display screen 11, the middle frame 12 and the rear shell 13 are jointly enclosed to form an accommodating space 100; the sealing gasket 14 and the dustproof net 15 are arranged between the middle frame 12 and the rear shell 13 to seal the middle frame 12 and the rear shell. 13; the PCB board 16 and the electro-acoustic device 17 are electrically connected, and both are arranged in the accommodating space 100; the electro-acoustic device 17 uses electromagnetic induction, electrostatic induction or piezoelectric effect to complete the electro-acoustic conversion. , to realize the sound transmission function of the electronic device 10 .

Specifically, the display screen 11 is covered on one side of the middle frame 12, and may include a display module and a circuit for responding to a touch operation on the display module, and the like. The display screen 11 may be an OLED (Organic Light-Emitting Diode) screen for image display, or an LCD (Liquid Crystal Display, liquid crystal display) screen for image display. In addition, 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 mobile phones, the above-mentioned flat screen means that the display screen 11 is arranged in a flat shape as a whole; the above-mentioned hyperboloid screen means 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 curved shape. The flat-panel arrangement can not only reduce the black border of the display screen 11 and increase the visible area of the display screen 11, but also increase the aesthetic appearance and grip of the electronic device 10; the above four-curved screen refers to the upper part of the display screen 11. , the lower, left and right edge areas are all set in a curved shape, and other areas are still set in a flat shape, which can not only further reduce the black edge of the display screen 11 and increase the visual area of the display screen 11, but also further increase the electronic equipment. 10's appearance and grip feel.

Please refer to FIGS. 3 to 7 , FIG. 3 is a partial cross-sectional structural diagram of the electronic device 10 in FIG. 1 along VI-VI, FIG. 4 is a partial structural schematic diagram of the electronic device 10 in FIG. A partial cross-sectional structural diagram of the electronic device 10 at A along XI-XI, FIG. 6 is a partial structural schematic diagram of the middle frame 12 in FIG. 4 , and FIG. 7 is a partial structural schematic diagram of the middle frame 12 in FIG. 4 from another perspective.

As shown in FIG. 3 to FIG. 7 , the rear case 13 is fastened to the side of the middle frame 12 away from the display screen 11 , and the three are together to form an accommodating space 100 . The accommodating space 100 can not only be used to install the PCB board 16 and the electroacoustic device 17 , but also can be used to install a battery, a camera, a fingerprint recognition module, etc., 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 of integral structure, and the frame 121 is formed by extending the side wall of the middle plate 122 in the thickness direction of the middle plate 122 . In some embodiments, the frame 121 and the middle plate 122 may also be two independent structural members, which are fixedly connected by means of bonding, welding, plugging, and the like. The rear shell 13 can be fastened on the frame 121 to realize the fixed connection between the rear shell 13 and the middle frame 12 . The rear shell 13 may be provided with a sound hole 131 , and the sound hole 131 is disposed opposite to the frame 121 . The middle frame 12 may be provided with a sound transmission channel 123. The sound transmission channel 123 is formed with a first channel opening 1231 on the side of the frame 121 facing the sound hole 131, and is also formed on the side of the middle plate 122 close to the rear shell 13 in the thickness direction. There is a second channel port 1232 . The sound hole 131 is disposed opposite to the first channel port 1231 , so that the sound hole 131 can communicate with the sound transmission channel 123 . Therefore, the sound from the outside can be conducted to the inside of the electronic device 10 through the sound hole 131 and the sound transmission channel 123 , or the sound from the inside of the electronic device 10 can be conducted to the outside.

In addition, the middle frame 12 is also provided with a positioning groove 124 and an installation groove 125 . The positioning groove 124 is formed on the side of the frame 121 close to the rear case 13 in the thickness direction, and the positioning groove 124 is located on the side of the first channel opening 1231 close to the rear case 13 . When the middle frame 12 and the rear shell 13 are snapped and scraped against the gasket 14, the positioning groove 124 is used for positioning the gasket 14 arranged between the middle frame 12 and the rear shell 13, so as to enhance the firmness of the installation of the gasket 14. The probability of the gasket 14 falling off or deviating is reduced. The installation groove 125 is opened around the first channel opening 1231 for installing the gasket 14 to reduce the scratching 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 only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include at least one of that feature.

Please refer to FIGS. 8 to 14 in conjunction with FIG. 5 . FIG. 8 is a schematic structural diagram of the sealing gasket 14 in FIG. 4 , FIG. 9 is a schematic structural diagram of the connection between the middle frame 12 and the sealing gasket 14 in FIG. 4 , and FIG. 10 is the middle frame in FIG. 4 . 12. A schematic diagram of the connection structure of the sealing gasket 14 and the dust filter 15. FIG. 11 is another structural schematic diagram of the positioning groove 124 in FIG. 6 , FIG. 12 is another structural schematic diagram of the positioning groove 124 in FIG. 6 , and FIG. 13 is FIG. 6 Another structural schematic diagram of the middle positioning groove 124, FIG. 14 is a structural schematic diagram of the positioning groove 124 in some embodiments, and FIG. 15 is a structural schematic diagram of the dust filter 15 in FIG. 10 .

As shown in FIG. 8 to FIG. 10 , the gasket 14 may be specifically made of flexible materials such as silica gel, foam, rubber, etc., and has strong waterproof and dustproof performance. At the same time, when the electronic device 10 is subjected to an external impact, it can also play a certain buffering role. In this embodiment, the gasket 14 is located between the frame 121 of the middle frame 12 and the rear case 13 , and is located in the area where the sound transmission channel 1231 communicates with the sound hole 131 . The sealing gasket 14 is provided with a through hole 141 , the through hole 141 communicates with the sound transmission channel 1231 and the sound hole 131 , and at least a part of the sealing gasket 14 is disposed in the positioning groove 124 . Due to the tolerances in the design of the two structural members of the middle frame 12 and the rear shell 13, there is often a certain size gap between them. Therefore, the sound hole 131 of the rear shell 13 not only communicates with the sound transmission channel 123 of the middle frame 12, but also communicates with the gap between the rear shell 13 and the frame 122, so that external water stains and dust can enter the rear through the sound hole 131. In the gap between the casing 13 and the frame 122 , other internal spaces of the electronic device 10 can be entered through the gap. The sealing gasket 14 in this embodiment is used to fill the gap between the frame 121 and the rear shell 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, Thus, the airtightness of the electronic device 10 is enhanced.

Specifically, the sealing gasket 14 may include a positioning part 142 and a filling part 143 of an integral structure. The positioning portion 142 is disposed in the positioning groove 124 of the middle frame 12 , and the shape of the positioning portion 142 is adapted to the shape of the positioning groove 124 . For example, in this embodiment, the shape of the positioning groove 124 may be a dovetail groove, and the positioning portion 142 may be an interference fit with the positioning groove 124 . When the gasket 14 is scratched by the rear shell 12 in the fastening direction X, since the positioning groove 124 is a dovetail groove, the positioning portion 142 and the positioning groove 124 are in an interference fit. Therefore, the positioning portion 142 will be stuck in the positioning groove 124 after being stressed, thereby realizing the positioning of the sealing gasket 14 and reducing the probability of the sealing gasket 14 being detached or deviated after being scratched by the rear case 12 . Further, the inner wall of the positioning groove 124 can also be coated with a back glue 1241, and the positioning portion 142 is fixed in the positioning groove 124 through the back glue 1241, so as to enhance the connection firmness of the positioning portion 142 and the positioning groove 124, and further reduce the sealing pad 14 The probability of disengagement or deviation after being scratched by the rear case 12 .

As shown in FIGS. 11 to 14 , in some embodiments, the shape of the positioning groove 124 may also be a T-shaped groove or an L-shaped groove, or a combination of a T-shaped groove and a dovetail groove, and only the shape of the positioning portion 142 needs to be the same as that of the shape of the positioning portion 142 . The shape of the positioning groove 124 can be adapted and can be fixed in the positioning groove 124 , which is not limited in this embodiment. In other embodiments, a positioning post 1211 may be further provided on the surface of the frame 121 opposite to the rear case 13 in the positioning groove 124 , and the positioning post 1211 is passed through the positioning portion 142 to further enhance the positioning portion 142 and the positioning The firmness of the connection between the grooves 124 reduces the probability of the gasket 14 being detached or deviated after being scratched by the rear case 12 . The number of the positioning posts 1211 may be specifically set according to the actual size of the positioning grooves 124 , which is not limited in this embodiment.

As shown in FIGS. 5 and 8 , the filling portion 143 is disposed in the installation groove 125 , and the filling portion 143 is used to seal the gap between the frame 121 and the rear case 13 . The filling portion 143 is disposed around the first channel opening 1231 to form the through hole 141 , so that the sound hole 131 can communicate with the sound transmission channel 1231 only through the through hole 141 . In this embodiment, the filling part 143 may specifically include a body 1431 and a convex wall 1432 . The body 1431 can be attached to the installation groove 125 by double-sided tape, and is flush with the surface of the frame 121 near the sound hole 131 to reduce the area where the rear case 13 scratches the gasket 14 . In some embodiments, the thickness of the main body 1431 may also be lower than the thickness of the installation groove 125 , and it is only necessary that the rear case 13 does not scratch the main body 1431 when the middle frame 12 and the rear case 13 are fastened together. The protruding wall 1432 is disposed on the side of the main body 1431 close to the rear shell 13 and abuts against the rear shell 13 . At the same time, the protruding wall 1432 is also disposed around the first passage opening 1231 . By abutting and cooperating with the convex wall 1432 and the rear case 13, the filling portion 143 can fill the gap between the middle frame 12 and the rear case 13 to ensure the sealing of the electronic device 10, and at the same time, it can reduce the amount of filling of the rear case 13. The scratching area of the portion 143 reduces the probability of the gasket 14 falling off or deviating after being scratched by the rear case 13 .

As shown in FIG. 15 , the dustproof net 15 can be covered on the first channel opening 1231 to separate the sound hole 131 and the sound transmission channel 123, so that the dust entering from the sound hole 131 can be blocked at the dustproof net 15, In order to avoid the sound transmission channel 123 being blocked by dust. Wherein, the dustproof net 15 is also provided with a dustproof hole 151 to realize the communication between the sound transmission channel 123 and the sound hole 131 . For example, in this embodiment, the area of the protruding wall 1432 of the filling part 143 surrounding the first passage opening 1231 is larger than the area of the main body 1431 surrounding the first passage opening 1231, so that the dustproof net 15 can fit on the main body 1431 at the first passage opening 1231. The exposed area near the channel opening 1231 realizes the fixed installation of the dustproof net 15 . At the same time, the convex wall 1432 can also be arranged around the dustproof net 15 , and has an interference fit with the dustproof net 15 , so as to enhance the firmness of the dustproof net 15 .

As shown in FIG. 3 , the PCB board 16 and the electroacoustic device 17 are arranged in the accommodating space 100 . The PCB board 16 is disposed on the side of the middle board 122 close to the rear case 13 in the thickness direction, and covers the second channel opening 1232 of the sound transmission channel 123 . The electroacoustic device 17 is disposed on the side of the PCB board 16 close to the rear case 13 and is electrically connected to the PCB board 16 . The PCB board 16 is provided with an opening 161 , and the opening 161 penetrates the PCB board 16 in the thickness direction of the PCB board 16 and communicates with the second channel opening 1232 . The electro-acoustic device 17 is covered on the opening 161 , so as to realize the communication between the electro-acoustic device 17 and the sound transmission channel 123 , so that the electro-acoustic device 17 can perform corresponding work through the sound transmission channel 123 . In this embodiment, the electro-acoustic device 17 may specifically be any one of a microphone, a speaker, and a receiver. In some embodiments, the electroacoustic device 17 may also be other devices that need the sound transmission channel 123 to work, which is not limited in this embodiment.

In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. All directional indications (such as up, down, left, right, front, rear...) in the embodiments of the present application are only used to explain the relative positional relationship between components under a certain posture (as shown in the accompanying drawings). , motion situation, etc., if the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Further, please refer to FIG. 16 , which is a schematic structural diagram of the electronic device 10 provided by an embodiment of the present application. As shown in FIG. 16 , the electronic device 10 provided in this embodiment of the present application may further include an RF circuit 910 , a memory 920 , an input unit 930 , a display unit 940 (ie, the display screen 11 in the above embodiment), a sensor 950 , and an audio circuit 960 , wifi module 970, processor 980, power supply 990, etc. 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 to the processor 980 ;

Specifically, the RF circuit 910 is used to send and receive signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation keys; the display unit 940 is used for The sensor 950 may include a display panel 941, etc.; the sensor 950 includes an infrared sensor, a laser sensor, etc., for detecting user proximity signals, distance signals, etc.; the speaker 961 and the microphone (or the microphone, or the electroacoustic device 17 in the above embodiment) 962 through the audio circuit 960 is connected to the processor 980 for receiving and sending 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.

In the electronic device 10 provided by the embodiment of the present application, by opening the positioning groove 124 on the side of the middle frame 12 close to the rear shell 13 in the thickness direction, at least part of the sealing gasket 14 is arranged in the positioning groove 124, so that the sealing gasket 14 can pass through the positioning groove The 124 is positioned and installed between the middle frame 12 and the rear shell 13 to fill the gap between the middle frame 12 and the rear shell 13 in the communication area between the sound hole 131 and the sound transmission channel 123 , thereby meeting the airtightness requirement of the electronic device 10 . At the same time, disposing at least part of the gasket 14 in the positioning groove 124 can also improve the firmness of the gasket 14 and reduce the probability of the gasket 14 being scraped off or deviated by the rear case 13 during the assembly process of the electronic device 10 . Further, by opening the installation groove 125 on the side of the middle frame 12 close to the sound hole 131, the sealing gasket 14 can be arranged in the installation groove 125, reducing the area where the sealing gasket 14 and the rear shell 13 are scratched, and reducing the sealing The probability of the pad 14 being scraped off or deviated by the rear case 13 improves the yield and reliability of the electronic device 10 .

The above descriptions are only part of the embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related The technical field is similarly included in the scope of patent protection of this application.

Claims (10)

1. An electronic device, characterized in that the electronic device comprises: a middle frame, a rear shell and a gasket; The rear shell is fastened to the middle frame, and the rear shell is provided with a sound hole; The middle frame is provided with a sound transmission channel, and the sound transmission channel is communicated with the sound hole; The gasket is located 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 with each other; A positioning groove is provided on the side of the middle frame close to the rear shell in the thickness direction; The sealing gasket is disposed in the positioning groove at least in part to position the sealing gasket. 2. The electronic device according to claim 1, wherein the sound transmission channel comprises: a first channel port and a second channel port; The first channel opening is arranged towards the sound hole, and the second channel opening is arranged towards the rear shell in the thickness direction of the middle frame; The sealing gasket includes a positioning part and a filling part of an integral structure; the positioning part is arranged in the positioning groove; The filling part is disposed around the first channel opening to form the through hole communicating with the sound transmission channel; the filling part is used to fill the gap between the middle frame and the rear shell. 3 . The electronic device according to claim 2 , wherein the shape of the positioning groove is any one of a dovetail groove, a T-shaped groove and an L-shaped groove; wherein, the positioning portion and the positioning groove shape to match. 4 . The electronic device according to claim 3 , wherein the inner wall of the positioning groove is coated with a back glue, and the positioning portion is fixed in the positioning groove by the back glue. 5 . 5 . The electronic device according to claim 2 , wherein the middle frame is further provided with an installation groove, and the installation groove is opened around the first channel opening; and the filling portion is arranged in the installation groove. 6 . . 6. The electronic device according to claim 5, wherein the filling part comprises a body and a convex wall; the body is arranged in the installation groove; The protruding wall is arranged on the side of the main body close to the rear shell, and abuts with the rear shell; wherein: The convex wall is also arranged around the first passage opening. 7. The electronic device according to claim 2, wherein the electronic device further comprises a dustproof net; The dust-proof mesh cover is arranged on the first channel opening; The filling part is arranged around the dustproof net to fix the dustproof net. 8. The electronic device according to claim 2, wherein the electronic device further comprises: a PCB board and an electro-acoustic device; The PCB board is arranged on one side of the middle frame close to the rear shell in the thickness direction, and is covered on the second channel opening; wherein: The PCB board is provided with an opening, and the opening penetrates the PCB board in the thickness direction of the PCB board and communicates with the second channel opening; The electro-acoustic device is disposed on the side of the PCB board close to the rear shell, and the electro-acoustic device is also covered on the opening. 9 . The electronic device according to claim 8 , wherein the electro-acoustic device is any one of a microphone, a speaker and a receiver. 10 . 10 . The electronic device according to claim 1 , wherein the electronic device further comprises a display screen, and the display screen is covered with a side of the middle plate facing away from the rear case in a thickness direction. 11 .

Images