CN116668924B

CN116668924B - Electronic equipment

Info

Publication number: CN116668924B
Application number: CN202310922449.2A
Authority: CN
Inventors: 吴江; 张羽; 石伟杰; 罗晶; 王传果; 于利刚
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2023-11-14
Anticipated expiration: 2043-07-26
Also published as: CN116668924A

Abstract

The application provides electronic equipment, and relates to the technical field of electronic products. The electronic device includes: a housing, a speaker, a housing structure, and an acoustic resonance structure; the loudspeaker and the shell structure are fixed in the shell, the loudspeaker and the shell structure enclose a rear sound cavity, and the shell structure is provided with a first opening and a second opening which are spaced apart; the shell is internally provided with a volume-expanding rear cavity which is communicated with the rear sound cavity through a first opening, so that the volume-expanding rear cavity and the rear sound cavity jointly define a rear cavity of the loudspeaker; the sound resonance structure is fixed in the shell and is arranged on the outer side of the rear sound cavity, the sound resonance structure is provided with a resonance cavity, and the resonance cavity is provided with an opening which is communicated with the second opening. The electronic equipment has good vibration reduction effect.

Description

Electronic equipment

Technical Field

The present disclosure relates to electronic devices, and particularly to an electronic device.

Background

The speaker is used for restoring audio electric signals such as music, voice and the like into sound, has the function of supporting audio playing, and is widely applied to electronic equipment such as mobile phones, tablet computers, notebook computers and the like.

With the development of electronic device technology, there is a higher demand for audio experiences with speakers. Good low frequency effects will lead to a better audio experience. The key factor affecting the low frequency effect of the speaker is the physical size of the rear cavity of the speaker, and the larger the physical size of the rear cavity is, the better the low frequency effect will be.

In order to improve low frequency performance of a speaker, in the related art, an internal space of an electronic device is used as a rear cavity of the speaker. Therefore, when the loudspeaker works, the shell of the electronic equipment is driven to generate vibration, and the experience of a user is greatly influenced.

Disclosure of Invention

The application provides electronic equipment, which aims to solve the problem of vibration of a shell of the electronic equipment driven by a loudspeaker in the related art and is beneficial to weakening the vibration of the shell of the electronic equipment.

In order to achieve the above purpose, the application adopts the following technical scheme:

the application provides an electronic device. The electronic device includes: a housing, a speaker, a housing structure, and an acoustic resonance structure; the loudspeaker and the shell structure are fixed in the shell, the loudspeaker and the shell structure enclose a rear sound cavity, and the shell structure is provided with a first opening and a second opening which are spaced apart; the shell is internally provided with a volume-expanding rear cavity which is communicated with the rear sound cavity through a first opening, so that the volume-expanding rear cavity and the rear sound cavity jointly define a rear cavity of the loudspeaker; the sound resonance structure is fixed in the shell and is arranged on the outer side of the rear sound cavity, the sound resonance structure is provided with a resonance cavity, and the resonance cavity is provided with an opening which is communicated with the second opening.

According to the electronic equipment, the first opening and the second opening are arranged on the shell structure, and the first opening is communicated with the volume-expanding rear cavity and the rear sound cavity. The second opening communicates with the opening of the cavity of the acoustic resonant structure. Therefore, when the loudspeaker works, vibration sound waves in the rear sound cavity can be transmitted into the resonant cavity, and the resonant cavity can absorb sound wave energy of the rear sound cavity, so that impact force of air flow flowing into the capacity-expansion rear cavity from the rear sound cavity to the shell is weakened, the vibration phenomenon of the shell is reduced, and the use experience of a user is improved. In addition, compared with a mode of arranging the resonant cavity in the volume-expanding rear cavity, the first opening is communicated with the volume-expanding rear cavity and the rear sound cavity, and the second opening is communicated with the opening, so that the resonant cavity and the volume-expanding rear cavity are communicated to the rear sound cavity in a parallel mode, and the problem that the vibration reduction effect of the resonant cavity is poor due to the fact that sound waves enter the volume-expanding rear cavity first and then enter the resonant cavity to a certain extent is solved, and the vibration reduction effect is further improved.

In one possible implementation of the present application, the resonant cavity includes a resonant cavity body and an air guide channel, the air guide channel is communicated with the resonant cavity body, the volume of the air guide channel is smaller than that of the resonant cavity body, the cross-sectional area of the air guide channel is smaller than that of the resonant cavity body, and the opening is formed at the air guide channel. Therefore, the resonant cavity is a Helmholtz resonant cavity, the structure is simple, the processing and the manufacturing are convenient, and the vibration reduction effect is good.

In one possible implementation of the application, the housing comprises a back cover having a mounting opening, the acoustic resonant structure comprises a trim piece, the trim piece is fixed to the back cover and seals the mounting opening, and at least a portion of an inner wall surface of the resonant cavity is located on the trim piece. Therefore, the acoustic resonance structure and the camera decorative cover can share the decorative piece, so that one part can be saved, the material cost is reduced, the whole structure is more compact, and the thin design of the electronic equipment is realized.

In one possible implementation of the application, the trim piece has a camera aperture; the sound resonance structure further comprises a resonance plate, the resonance plate is located in the shell and fixed on the surface, facing the inside of the electronic equipment, of the decoration piece, and the resonance plate and the part, not provided with the camera hole, of the decoration piece enclose a resonance cavity. Therefore, the acoustic resonance structure and the camera decorative cover can share the decorative piece, so that one part can be saved, the material cost is reduced, the whole structure is more compact, and the thin design of the electronic equipment is realized. In addition, the resonant plate and the decoration are combined to form the resonant cavity, and the whole acoustic resonant structure is simple in structure and convenient to process the resonant cavity.

In one possible implementation manner of the application, the decoration piece comprises a cylinder body and a cover body, wherein the cylinder body is penetrated through the mounting opening, the outer end of the inner peripheral surface of the cylinder body is connected with the periphery of the cover body, and the camera hole is formed in the cover body; the resonance plate comprises a main body part, the main body part is opposite to the cover body part, the resonance cavity comprises a resonance cavity body, and the resonance cavity body is formed between the main body part and the cover body part. Therefore, the resonant cavity body can be arranged by fully utilizing the space enclosed by the cylinder body and the cover body, the structural compactness of the electronic equipment is realized, the thickness of the electronic equipment is reduced, and the thin design of the electronic equipment is further realized.

In one possible implementation manner of the present application, a convex rib is provided on a surface of the cover portion facing the inside of the electronic device, two ends of the convex rib in a direction parallel to the cover portion are respectively connected to an inner peripheral surface of the cylindrical body portion, and the convex rib, a portion of the inner peripheral surface of the cylindrical body portion between the two ends of the convex rib, and a portion of the surface of the cover portion facing the inside of the electronic device enclose a resonance open cavity opening toward the inside of the electronic device; the main body part is fixed on the convex rib, and covers the opening of the resonance open cavity to jointly define the resonant cavity body with the resonance open cavity. Thus, the structure is simple.

In one possible embodiment of the application, the bead and the cover part may be formed as an integral part, i.e. the bead and the cover part are of one integral structure. The arrangement is beneficial to improving the connection strength between the convex rib and the cover body, and can simplify the production process and reduce the production cost.

In one possible implementation of the application, a portion of the surface of the main body portion facing the resonant open cavity is recessed in a direction away from the resonant open cavity to define a resonant tank, the resonant tank and the resonant open cavity together defining a resonant cavity body. Therefore, the volume of the resonant cavity body can be increased, the resonant frequency of the acoustic resonant structure can be reduced, and the structure is simple.

In one possible implementation of the application, the ornamental piece comprises an annular flange connected to the inner end of the outer peripheral surface of the barrel portion, the annular flange being fixed to a portion of the inner surface of the back cover surrounding the mounting opening; the resonant cavity comprises an air guide channel;

the resonance plate comprises a channel part, the channel part is connected with the main body part, the channel part is fixedly laminated on the inner surface of the annular flanging, a part of the surface of the channel part facing the annular flanging is recessed in a direction away from the annular flanging to define a channel slot, the annular flanging covers the open mouth of the channel slot to jointly define an air guide channel with the channel slot, an opening is formed in the channel part, and the air guide channel is communicated with the resonance cavity body through the channel slot and the resonance slot. Because the dimension of the channel part and the annular flanging in the thickness direction of the electronic equipment is smaller than the dimension of the main body part and the cover body part in the thickness direction of the electronic equipment, the channel part is matched with the annular flanging to define the air guide channel, so that the dimension of the air guide channel in the thickness direction of the electronic equipment is reduced, the cross section area of the air guide channel is reduced, the resonance frequency of the acoustic resonance structure is reduced, and the vibration reduction effect is improved. And moreover, the structure is simple, and the processing and the manufacturing are convenient.

In one possible implementation of the application, the ornamental piece comprises an annular flange fixed to a portion of the inner surface of the back cover surrounding the mounting opening; the resonant cavity comprises an air guide channel; the resonator plate includes a channel portion secured to an inner surface of the annular flange in a stacked manner, the channel portion cooperating with the annular flange to define an air-guide channel, and the aperture being formed in the channel portion. Therefore, the space in the electronic equipment can be reasonably utilized, and the structure is more compact.

In one possible implementation of the application, a portion of the surface of the channel portion facing the annular flange is recessed in a direction away from the annular flange to define a channel slot, the annular flange closing the open mouth of the channel slot to define an air-guide channel with the channel slot. Therefore, the space in the electronic equipment can be reasonably utilized, the structure is more compact, the structure is simple, and the processing and the manufacturing are convenient.

In one possible implementation of the application, the annular flange comprises a flange body and a widening, the flange body being arranged around the mounting opening, the widening being connected to the peripheral edge of the flange body, the widening protruding from the peripheral edge of the flange body in a direction away from the mounting opening, a portion of the air duct being formed between the flange body and the duct portion, and another portion of the air duct being formed between the widening and the duct portion. Thus, the length of the air guide channel is increased, and the resonance frequency of the acoustic resonance structure is reduced.

In one possible implementation manner of the application, the electronic device comprises a screen, a middle frame and a back cover, wherein the middle frame comprises a middle plate and a frame, the middle plate is arranged in a stacked manner with the screen, the back cover is positioned on one side of the middle plate far away from the screen and is arranged in a stacked manner with the middle plate, and the frame is arranged around the back cover, the middle plate and a circle of the screen; the frame, the middle plate and the back cover enclose a first cavity, the loudspeaker is positioned in the first cavity and fixed on the middle plate, and the first cavity forms at least one part of the capacity-expanding rear cavity of the loudspeaker.

In one possible implementation of the present application, a communication hole penetrating the middle plate is formed on the middle plate; the loudspeaker comprises a vibrating diaphragm, wherein the vibrating diaphragm seals the communication hole, the inner peripheral wall of the communication hole and the outer surface of the vibrating diaphragm can define a front cavity of the loudspeaker, and the front cavity and a rear sound cavity are positioned at two sides of the vibrating diaphragm; the electronic equipment is provided with a sound outlet hole, and the sound outlet hole is communicated with the front cavity and the outside of the electronic equipment. Through set up the intercommunicating pore on the medium plate to utilize the inner peripheral wall of intercommunicating pore and the surface of vibrating diaphragm to define the antechamber of speaker, be favorable to realizing the compactibility of electronic equipment structure, need not to set up the antechamber in addition in the space outside the medium plate, be favorable to reducing electronic equipment's thickness.

In one possible implementation manner of the present application, the housing structure includes a middle plate, a sound cavity plate and a surrounding board, the sound cavity plate is fixed in the first cavity, the sound cavity plate is located on one side of the speaker far away from the middle plate and is stacked with the middle plate, the surrounding board is connected between the middle plate and the sound cavity plate, and is arranged around the speaker in the whole circumference of the speaker, the surrounding board, the middle plate and the sound cavity plate together enclose a post-sound cavity, and the first opening is formed in the surrounding board and/or the sound cavity plate. Therefore, on one hand, the vibrating diaphragm, the enclosing baffle, the middle plate and the sound cavity plate of the loudspeaker are utilized to jointly enclose the rear sound cavity, so that the tightness of the rear sound cavity is improved, and on the other hand, the vibrating diaphragm, the enclosing baffle and the sound cavity plate of the middle plate and the loudspeaker are utilized to jointly enclose the rear sound cavity, so that the material cost is reduced, and the space inside the electronic equipment is saved.

In one possible implementation manner of the application, the enclosure comprises a first baffle rib and a second baffle rib, the first baffle rib is fixed on the surface of the middle plate facing the back cover and is arranged around the loudspeaker in the whole circumference direction of the loudspeaker, the second baffle rib is fixed on the surface of the sound cavity plate facing the middle plate, the second baffle rib is arranged on the periphery of the loudspeaker along the circumference direction of the loudspeaker, one end of the second baffle rib in the circumference direction is provided with a first opening, and the end face of the second baffle rib far away from the sound cavity plate is in sealing connection with the end face of the first baffle rib far away from the middle plate. Through dividing the enclosure into a first baffle rib and a second baffle rib, the processing and the manufacturing can be more convenient. The arrangement of the first blocking rib is beneficial to enhancing the structural strength of the middle plate, and is beneficial to utilizing the first blocking rib to play a role in positioning a loudspeaker and improving the assembly efficiency; the setting of second fender muscle can be favorable to strengthening the structural strength of sound chamber board on the one hand, and on the other hand still is favorable to utilizing this second to keep off the muscle and plays the effect of location to sound chamber board and speaker, improves assembly efficiency.

In one possible embodiment of the application, the first rib and the middle plate may be formed as an integral part, i.e. the first rib and the middle plate are of one integral structure. The arrangement is beneficial to improving the connection strength between the first retaining rib and the middle plate, and can simplify the production process and reduce the production cost.

In one possible embodiment of the application, the second rib and the sound chamber plate may be formed as an integral part, i.e. the second rib and the sound chamber plate are of one integral structure. The arrangement is beneficial to improving the connection strength between the second blocking rib and the sound cavity plate, and can simplify the production process and reduce the production cost.

For example, the second rib and the first rib may be connected in a sealing manner by using a sealant (not shown). In other examples, the second rib may abut the first rib to achieve a sealed connection.

In one possible implementation of the application, the area of the surface of the sound chamber plate facing the loudspeaker surrounded by the enclosure is recessed away from the middle plate to form a rear sound groove. In this way, on the one hand, when the size of the enclosure in the thickness direction of the electronic device is kept unchanged, the volume of the rear sound cavity is increased by utilizing the rear sound groove, and the low-frequency effect of the loudspeaker is improved. On the other hand, the size of the enclosure along the thickness direction of the electronic equipment is reduced on the premise of ensuring that the volume of the rear sound cavity is unchanged, so that the thickness of the electronic equipment is further reduced, and the thin design of the electronic equipment is realized.

In one possible implementation of the present application, a speaker includes a diaphragm and a driving device, the driving device being located at one side of the diaphragm along a thickness direction of the diaphragm and connected to the diaphragm; the shell structure comprises a sound cavity plate, the sound cavity plate is located at one side of the driving device, far away from the vibrating diaphragm, a part of the surface of the sound cavity plate, facing the driving device, is sunken to a direction far away from the driving device to form a rear sound groove, the driving device seals a part of an opening of the rear sound groove and defines a rear sound cavity together with the rear sound groove, and the rest part of the opening of the rear sound groove defines a first opening. Thus, the structure is simple and compact.

In one possible implementation of the present application, a positioning step is formed at the opening of the rear sound groove. One end of the driving device far away from the vibrating diaphragm is matched with the positioning step. Therefore, the fixing step is beneficial to playing a role in fixing the sound cavity plate and the loudspeaker, and the assembly efficiency is improved.

In one possible embodiment of the application, the surface of the middle plate facing the back cover is provided with a first rib, which is arranged around the loudspeaker over the entire circumference of the loudspeaker. The setting of first fender muscle can be favorable to reinforcing the structural strength of medium plate on the one hand, and on the other hand still is favorable to utilizing this first fender muscle to play the locate action to the speaker, improves assembly efficiency.

In one possible implementation manner of the application, the electronic device comprises a screen, a middle frame and a back cover, wherein the middle frame comprises a middle plate and a frame, the middle plate is arranged in a stacked manner with the screen, the back cover is positioned on one side of the middle plate far away from the screen and is arranged in a stacked manner with the middle plate, and the frame is arranged around the back cover, the middle plate and a circle of the screen; the frame, the middle plate and the back cover enclose a first cavity, the loudspeaker is positioned in the first cavity and fixed on the middle plate, the first cavity forms at least one part of a capacity-expanded cavity of the loudspeaker, the sound cavity plate is positioned in the first cavity, and the sound cavity plate is positioned at one side of the loudspeaker far away from the middle plate and is laminated with the middle plate; the electronic equipment further comprises a circuit board and a circuit board bracket, wherein the circuit board and the circuit board bracket are both positioned in the first cavity, the circuit board is fixedly arranged on the middle plate in a laminated mode and is electrically connected with the loudspeaker, the circuit board bracket is respectively connected with the circuit board and the middle frame, and the circuit board bracket comprises a sound cavity plate. Therefore, the material cost can be further reduced, and the space inside the electronic equipment can be saved.

In one possible implementation of the application, the circuit board comprises a main circuit board. The circuit board support comprises a main circuit board support. The main circuit board support is respectively connected with the main circuit board and the middle frame. The main circuit board support comprises a sound cavity plate.

In one possible implementation of the present application, a sound cavity plate includes: body plate and apron. The body plate is provided with a through hole penetrating through the body plate along the thickness direction of the body plate; the cover plate is stacked on one side, far away from the loudspeaker, of the body plate, and the cover plate seals the through hole to define a rear sound groove with the through hole. Therefore, the sound cavity plate comprises the body plate and the cover plate, and is simple in structure and convenient to process and manufacture.

In one possible implementation of the present application, the acoustic resonant structure includes a resonant plate, the resonant plate is configured to define a portion of an inner wall surface of the resonant cavity, the resonant plate is a cover plate, and the second opening is an opening and is formed in the cover plate. Therefore, the cover plate can be used for forming the wall surface of the rear sound cavity and a part of the wall surface of the resonant cavity, so that the cover plate is shared by the sound resonant structure and the shell structure, one part can be saved, the material cost is reduced, the whole structure is more compact, and the thin design of the electronic equipment is realized.

In one possible implementation of the application, the opening area of the second opening is smaller than the opening area of the first opening. Thus, the vibration reduction effect can be ensured, and the low-frequency performance of the loudspeaker can be improved.

In one possible implementation of the application, the resonance frequency of the housing is the same as the resonance frequency of the acoustic resonant structure. Thus, the vibration reduction effect is good.

In some possible implementations of the first aspect, the volume of the rear sound cavity is 5 mm ³ ~500mm ³ . In this way, it is advantageous to ensure that the housing structure has a relatively large size, so that it is possible to ensure that there is sufficient space in the housing structure to arrange the first opening and the second opening, while also being advantageous to improve the low frequency effect of the loudspeaker.

In some possible implementations of the first aspect, the volume of the rear sound cavity is 50 mm ³ ~300mm ³ . In this way, it is advantageous to ensure that the housing structure has a relatively large size, so that it is possible to ensure that there is sufficient space in the housing structure to arrange the first opening and the second opening, while also being advantageous to improve the low frequency effect of the loudspeaker.

In some possible implementations of the first aspect, the first opening has an opening area greater than or equal to 1 mm ² 。

In some possible implementations of the first aspect, the first opening has an opening area greater than or equal to 5 mm ² 。

In order to facilitate the smooth entry of the air flow into the air guide channel, the vibration reduction effect is improved, and the opening area of the second opening is greater than or equal to the cross-sectional area of the air guide channel.

In order to facilitate the smooth entry of the air flow into the air guide channel, the opening area of the opening is greater than or equal to the cross-sectional area of the air guide channel.

In some possible implementations of the first aspect, the cross-sectional area of the air guide channel has a value of 0.1 to 3 mm ² 。

In some possible implementations provided by the present application, the screen includes a front cover plate and a display screen that are stacked. The display screen is located between medium plate and the front shroud. The front cover plate, the frame and the back cover enclose a housing of the electronic device. Through setting up the front bezel, can utilize the front bezel to protect the display screen, improve the anti performance that falls of display screen.

In some possible implementations provided by the application, a first step recessed toward a direction away from a central axis of the bezel is formed on a portion of an inner peripheral surface of the bezel, which is close to the front cover plate, and the front cover plate is supported on the first step. Through setting up first step, can utilize first step to fix a position the installation to the screen, be favorable to improving installation effectiveness.

In some possible implementations provided by the application, a first step recessed toward a direction away from a central axis of the bezel is formed on a portion of the inner peripheral surface of the bezel, which is close to the light-transmitting cover plate, and the light-transmitting cover plate is supported on the first step. Through setting up first step, can utilize first step to fix a position the installation to the screen, be favorable to improving installation effectiveness.

In some possible implementations provided by the application, the middle frame is an integral molding. Thus being beneficial to improving the structural strength of the middle frame, simplifying the processing technology of the middle frame and reducing the production cost of the middle frame.

In some possible implementations of the first aspect, a portion of the inner peripheral surface of the bezel, which is close to the back cover, is formed with a second step recessed toward a direction away from the central axis of the bezel, and the back cover is supported on the second step. Through setting up the second step, can utilize the second step to carry out location installation to the back of the body lid, be favorable to improving installation effectiveness.

In some possible implementations provided by the application, a groove recessed toward a direction away from a central axis of the frame is formed on a part of an inner peripheral wall of the frame, the groove is located on one side of the middle plate away from the back cover, the groove extends to an end face of the frame in a direction away from the back cover, and a part of an outer peripheral surface of the screen opposite to the groove and the groove define a sound hole. The sound outlet hole has a certain hiding effect, can improve the appearance aesthetic property of the electronic equipment, and is beneficial to improving the structural strength of the electronic equipment.

In some possible implementations provided by the application, the sound outlet penetrates the frame in the thickness direction of the wall plate of the frame.

In some possible implementations provided by the present application, the sound outlet hole is formed directly by using an assembly gap between a portion of an outer peripheral surface of the screen and a portion of an inner peripheral surface of the bezel.

In some possible implementations provided by the application, the sound outlet hole may be formed on the screen.

In some possible implementations provided by the application, a sound guide channel is formed between the middle plate and the screen, and the sound guide channel is communicated with the communication hole and the sound outlet hole.

In some possible implementations provided by the application, a sound guiding groove recessed toward the back cover is formed on the surface of the middle plate facing the screen, the sound guiding groove communicates with the communication hole and the groove, and the screen covers the opening of the sound guiding groove to define a sound guiding channel with the sound guiding groove. The device is simple in structure and convenient to process and manufacture.

In some possible implementations provided by the application, a sound guide groove recessed toward a direction away from the middle plate is formed on a surface of the screen facing the middle plate, the sound guide groove communicates with the communication hole and the groove, the middle plate covers an opening of the sound guide groove, and the middle plate and the sound guide groove define a sound guide channel.

In some possible implementations provided by the application, the surface of the screen facing the middle plate and the surface of the middle plate facing the screen are both formed with sound guiding grooves, and the sound guiding grooves on the screen are opposite to and communicated with the sound guiding grooves of the middle plate so as to define sound guiding channels.

In some possible implementations provided by the application, the communication hole extends in the plane of the middle plate to an outer edge of the middle plate to communicate with the recess. By the arrangement, a sound guide channel is not required to be additionally arranged, and the structure can be simplified.

In some possible implementations provided by the present application, the width of the sound guiding groove gradually increases in a direction from the communication hole to the sound outlet hole. Thus, smooth communication between the sound guide channel and the sound outlet is guaranteed, and the sound guide effect of the sound guide channel is improved.

In some possible implementations provided by the application, an extension d1 of the sound outlet along the circumferential direction of the frame is equal to a width d2 of an end of the sound guiding groove adjacent to the sound outlet. Thus, the smoothness of sound output is guaranteed.

In some possible implementations provided by the application, the electronic device further includes an adhesive layer disposed between the middle plate and the screen. Through setting up the viscose layer, can improve the joint strength of medium plate and screen.

Drawings

FIG. 1 is a perspective view of an electronic device according to some embodiments of the present application;

FIG. 2 is an exploded schematic view of the electronic device shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the electronic device shown in FIG. 1, taken along line A1-A1;

FIG. 4 is a schematic cross-sectional view of the electronic device shown in FIG. 1, taken along line A2-A2;

FIG. 5 is an enlarged view of a circled portion at F of the electronic device shown in FIG. 4;

fig. 6 is a perspective view of a middle frame of the electronic device shown in fig. 1-3;

FIG. 7 is an enlarged view of a portion of the middle frame shown in FIG. 6 circled at G;

FIG. 8 is a schematic diagram illustrating the cooperation of a middle frame and an adhesive layer in the electronic device shown in FIGS. 1-3;

fig. 9 is a front view of the structure according to fig. 5;

fig. 10 is a cross-sectional view of a speaker in the structure according to fig. 9;

fig. 11 is a schematic diagram of the cooperation of the center frame and speakers shown in fig. 1-3;

FIG. 12 is a perspective view of the acoustic cavity plate according to FIG. 9;

FIG. 13 is an exploded view of the acoustic cavity plate according to FIG. 12;

FIG. 14 is a schematic diagram illustrating the mating of the back cover, camera trim, and acoustic resonating structures in the electronic device shown in FIG. 9;

FIG. 15 is an exploded view of the structure shown in FIG. 14;

FIG. 16 is a schematic cross-sectional view of the structure shown in FIG. 14, taken along line A4-A4;

FIG. 17 is a schematic view of a structure of the resonator plate according to FIG. 16;

FIG. 18 is a schematic view of a partial cross-sectional structure of an electronic device according to other embodiments of the present application;

FIG. 19 is a perspective view of an electronic device provided in accordance with further embodiments of the present application;

FIG. 20 is a schematic cross-sectional view of the electronic device shown in FIG. 19, taken along line A5-A5;

FIG. 21 is an enlarged view of a encircled portion at H according to the structure shown in FIG. 20;

FIG. 22 is a perspective view of an electronic device according to other embodiments of the present application;

FIG. 23 is a schematic cross-sectional view of the electronic device shown in FIG. 22, taken along line A6-A6;

fig. 24 is an enlarged view of a circled portion at J of the electronic device shown in fig. 23.

Reference numerals:

1. an electronic device;

10. a screen; 11. a front cover plate; 12. a display screen;

20. a middle frame; 21. a frame; 211. a first step; 212. a second step; 213. a groove; 21a, a socket; 22. a middle plate; 221. a first rib; 222. a second blocking rib; 22a, mounting slots; 22b, communication holes; 22e, a sound guide groove; 22m, a first installation space; 22n, a second installation space;

30. A back cover; 30a, a mounting port;

40. a circuit board; 41. a main circuit board; 41a, avoiding the through hole; 41b, avoidance holes; 42. a secondary circuit board; 42a, connection structure; 42b, USB device;

50. a circuit board bracket; 51. main circuit board support

60. A battery;

70. a camera module;

80. a camera decorative cover; 81. a decoration piece; 811. a cylinder body; 812. a cover body; 812a, camera holes; 812b, ribs; 813. annular flanging; 8131. a flanging body; 8132. a widening part; 82. a light-transmitting cover;

90. a speaker; 91. a vibrating diaphragm; 92. a driving device; 921 a frame; 922. a voice coil; 923. a magnetic circuit system;

100. a sound outlet hole;

110. an adhesive layer; 1101. a first glue segment; 1102. a second glue segment;

120. a housing structure; 1201. a sound cavity plate; 12011. a body plate; 12012. a cover plate; 1202. a surrounding baffle; 12021. a first rib; 12022. a second blocking rib; 1203. a first opening; 1204. a second opening; 1205. a rear sound groove; 1208. positioning the step;

130. an acoustic resonant structure; 1301. a resonance plate; 13011. a main body portion; 13012. a channel portion;

k1, a first cavity; k2, a second cavity; k3, front cavity; k4, a rear cavity; k41, rear sound cavity; k5, resonant cavity; k51, resonant cavity body; k511 resonant open cavity; k52, air guide channel; and K7, vibrating space.

Detailed Description

In embodiments of the present application, the terms "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of embodiments of the present application, the term "and/or" refers to and encompasses any and all possible combinations of one or more of the associated listed items. The term "and/or" is an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the description of embodiments of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and for example, "connected" may be either detachably connected or non-detachably connected; may be directly connected or indirectly connected through an intermediate medium.

In the description of embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

As used herein, "parallel", "perpendicular", "equal" includes the stated case as well as the case that approximates the stated case, the range of which is within an acceptable deviation range as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable deviation range for approximately parallel may be, for example, within ±10° of deviation; "vertical" includes absolute vertical and near vertical, where the acceptable deviation range for near vertical may also be within + -10 deg., for example. "equal" includes absolute equal and approximately equal, where the difference between the two, which may be equal, for example, is less than or equal to 5% of either of them within an acceptable deviation of approximately equal.

The application provides an electronic device, which is a type of electronic device with a function of supporting audio playing. In particular, the electronic device may be a portable electronic device or other suitable electronic device. For example, the electronic device may be a cell phone, a tablet (tablet personal computer), a laptop (laptop computer), a personal digital assistant (personal digital assistant, PDA), a camera, a personal computer, a notebook, a vehicle-mounted device, a wearable device (e.g., a wristwatch or a bracelet), augmented reality (augmented reality) glasses, AR helmets, virtual Reality (VR) glasses, VR helmets, or the like.

Referring to fig. 1 and 2, fig. 1 is a perspective view of an electronic device 1 according to some embodiments of the present disclosure; fig. 2 is an exploded schematic view of the electronic device 1 according to fig. 1. In this embodiment, the electronic device 1 is a mobile phone. The electronic device 1 may include a screen 10, a center frame 20, a back cover 30, a circuit board 40, a circuit board holder 50, a battery 60, a camera module 70, a camera trim cover 80, and a speaker 90.

It will be appreciated that fig. 1 and 2 only schematically show some components comprised by the electronic device 1, the actual shape, actual size, actual position and actual configuration of which are not limited by fig. 1 and 2. In other examples, the electronic device 1 may not include at least one of the circuit board holder 50, the battery 60, the camera module 70, and the camera decorative cover 80.

The screen 10 is used to display image information, video information, and the like. The screen 10 includes a front cover 11 and a display screen 12. The front cover 11 is flat. Specifically, the shape of the front cover plate 11 includes, but is not limited to, a rectangular plate, a square plate, an oblong plate, a circular plate, and an oval plate. Materials for the front cover 11 include, but are not limited to, glass, plastic, and ceramic. The front cover plate 11 is laminated with the display screen 12 and fixedly connected. The connection between the front cover 11 and the display 12 includes, but is not limited to, gluing. The front cover 11 is mainly used for protecting and dust-proof the display screen 12.

The display 12 may be a flexible display or a rigid display. For example, the display 12 may be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display 12, a mini-led (mini organic light-emitting diode) display, a micro-led (micro organic light-emitting diode) display, a micro-organic led (micro organic light-emitting diode) display, a quantum dot led (quantum dot light emitting diodes, QLED) display, or a liquid crystal display (liquid crystal display, LCD), etc. The front cover plate 11 is transparent, and the display surface of the display screen 12 is opposite to the front cover plate 11, so that information such as images and videos displayed by the display screen 12 can be observed by a user through the front cover plate 11.

For convenience of description of the embodiments below, an XYZ coordinate system is established for the electronic apparatus 1. Specifically, the thickness direction of the electronic apparatus 1 (i.e., the lamination direction of the front cover 11 and the display 12) is defined as the Z-axis direction, the directions perpendicular to the Z-axis direction are the X-axis direction and the Y-axis direction, respectively, and the X-axis direction and the Y-axis direction are perpendicular. Specifically, in this embodiment, the electronic apparatus 1 has a rectangular flat plate shape, wherein the length direction of the electronic apparatus 1 is the Y-axis direction, and the width direction of the electronic apparatus 1 is the X-axis direction. It is to be understood that the coordinate system setting of the electronic device 1 may be flexibly set according to actual needs, which is not specifically limited herein.

With continued reference to fig. 2, middle frame 20 includes middle plate 22 and side frame 21. The middle plate 22 is flat. The shape of the middle plate 22 is adapted to the shape of the front cover plate 11. The middle plate 22 is located at a side of the display screen 12 remote from the front cover plate 11, and the middle plate 22 is laminated with the screen 10. The midplane 22 serves as a structural "backbone" for the electronic device 1 and the circuit board 40, battery 60, etc. may be secured to the midplane 22.

With continued reference to fig. 2, and in conjunction with fig. 3, fig. 3 is a schematic cross-sectional structure of the electronic device 1 shown in fig. 1 at line A1-A1. The "line A1-A1" refers to the line A1-A1 and the plane where the arrows at the two ends of the line A1-A1 are located, and the description of the similar drawings should be understood in the following, and the description is not repeated. The bezel 21 is disposed around the middle plate 22 and the edge of the screen 10.

Specifically, a first step 211 recessed in a direction away from the central axis of the bezel 21 is formed on a portion of the inner peripheral surface of the bezel 21 near the front cover 11, and the front cover 11 is supported on the first step 211. In this way, the screen 10 can be positioned and mounted by the first step 211, and the mounting efficiency of the electronic apparatus 1 can be improved. Of course, it is understood that in other examples, the first step 211 may not be provided on the frame 21.

The middle frame 20 may be an integrally formed structure, that is, the middle plate 22 and the frame 21 are an integral structure. This is advantageous in improving the structural strength of the middle frame 20, and simplifying the processing process of the middle frame 20, which can reduce the production cost of the middle frame 20. Of course, the present application is not limited thereto, and in other examples, the middle frame 20 may be assembled by the frame 21 and the middle plate 22, and the connection manner between the frame 21 and the middle plate 22 includes, but is not limited to, gluing, clamping, screw connection, welding, and the like.

The back cover 30 has a flat plate shape. The shape of the back cover 30 includes, but is not limited to, a rectangular plate, an oblong plate, a circular plate, or an oval plate. Specifically, the shape of the back cover 30 is adapted to the shape of the front cover plate 11. The material of the back cover 30 includes, but is not limited to, glass, plastic, metal, and ceramic.

With continued reference to fig. 2 and 3, the back cover 30 is located on a side of the middle plate 22 away from the screen 10, and the back cover 30 is stacked and spaced from the middle plate 22. The frame 21 is disposed around a circumference of the back cover 30 and is fixed to the back cover 30. Illustratively, the frame 21 may be fixedly attached to the back cover 30 by gluing, welding, or clamping. Specifically, a second step 212 recessed in a direction away from the central axis of the bezel 21 is formed on a portion of the inner peripheral surface of the bezel 21 near the back cover 30, and the back cover 30 is supported on the second step 212. In this way, the back cover 30 can be positioned and mounted by the second step 212, so that the mounting efficiency of the electronic apparatus 1 can be improved. Of course, it is understood that in other examples, the second step 212 may not be provided on the frame 21. Alternatively, when the frame 21 and the middle plate 22 are not integrally formed, the frame 21 and the back cover 30 may be integrally formed, i.e. the frame 21 and the back cover 30 are integrally formed.

The back cover 30, the bezel 21, and the front cover 11 may enclose a housing of the electronic device 1. The housing houses the display 12, midplane 22, circuit board 40, battery 60, circuit board holder 50, camera module 70, speaker 90, and the like. With continued reference to fig. 3, the back cover 30, the frame 21, and the middle plate 22 may define a first cavity K1. The front cover plate 11, the rim 21 and the middle plate 22 may enclose a second cavity K2. The first cavity K1 may house the circuit board 40, the battery 60, the circuit board holder 50, and the like. The second cavity K2 may house the display screen 12 therein.

With continued reference to fig. 2 and 3, the circuit board 40 is disposed in the first cavity K1 and is stacked and fixed on the middle plate 22. The circuit board 40 may be electrically connected to the display 12, and the circuit board 40 is used to control the display 12 to display images or video.

Specifically, the circuit board 40 includes a main circuit board 41 and a sub circuit board 42.

The main circuit board 41 is used for integrating the main control chip. The main control chip may be, for example, an application processor (application processor, AP), double data rate synchronous dynamic random access memory (DDR), universal memory (universal flash storage, UFS), etc. In some embodiments, the main circuit board 41 is electrically connected to the display 12, and the main circuit board 41 is used to control the display 12 to display images or video. In some embodiments, the main circuit board 41 is electrically connected to the speaker 90, and the main circuit board 41 is used to control the speaker 90 to sound.

The main circuit board 41 may be a hard circuit board, a flexible circuit board, or a combination of a hard and soft circuit board. For example, the main circuit board 41 may be an FR-4 dielectric board, a Rogers dielectric board, a mixed dielectric board of FR-4 and Rogers, or the like. Here, FR-4 is a code of a flame resistant material grade, and the Rogers dielectric board is a high frequency board.

The main circuit board 41 is stacked and fixed on the middle plate 22. Illustratively, the main circuit board 41 may be secured to the surface of the midplane 22 facing the back cover 30 by screwing, clamping, gluing, or welding. To further improve the reliability of the fixing of the main circuit board 41 to the housing, in some embodiments, please continue to refer to fig. 2 and 3, the circuit board holder 50 includes a main circuit board holder 51. The main circuit board bracket 51 is located between the main circuit board 41 and the back cover 30, and the main circuit board bracket 51 is connected to the main circuit board 41 and the center frame 20, respectively. In this way, on the one hand, the fixing reliability of the main circuit board 41 can be improved by using the fixing between the main circuit board bracket 51 and the middle frame 20, and on the other hand, the main circuit board bracket 51 is also used for separating the electronic device on the main circuit board 41 from the back cover 30, so that the back cover 30 can be prevented from deforming to impact the electronic device to cause damage to the electronic device in the falling process of the electronic device 1. It will be appreciated that in other examples, the main circuit board holder 51 may not be provided in the electronic device 1.

The sub-circuit board 42 is used for an integrated serial bus (universal serial bus, USB) device 42b, etc. The USB device 42B may be a USB type-C interface device, a USB type-A interface device, a USB type Micro-B interface device, or a USB type-B interface device.

The frame 21 is provided with a socket 21a corresponding to the USB device 42b, and accessories such as a charger and a data line can be electrically connected with the USB device 42b through the socket 21a so as to realize transmission of power, signals and data.

The secondary circuit board 42 may be a hard circuit board, a flexible circuit board, or a combination of a hard and soft circuit board. The secondary circuit board 42 may be an FR-4 dielectric board, a Rogers dielectric board, a hybrid dielectric board of FR-4 and Rogers, or the like.

The secondary circuit board 42 is electrically connected with the primary circuit board 41 through a connection structure 42a to realize data and signal transmission between the secondary circuit board 42 and the primary circuit board 41. The connection structure 42a may be a flexible circuit board (flexible printed circuit, FPC), among others. In other embodiments, the connection structure 42a may be a wire or an enameled wire.

The sub-circuit board 42 is stacked and fixed to the middle board 22. And the sub-circuit board 42 and the main circuit board 41 are arranged in the Y-axis direction. Illustratively, the secondary circuit board 42 may be secured to the surface of the midplane 22 facing the back cover 30 by threading, clamping, gluing, or welding. To further improve the reliability of the fixation of the secondary circuit board 42 to the housing, the circuit board holder 50 may also include a secondary circuit board holder (not shown in the figures) in some embodiments. The sub-circuit board holder is located on a side of the sub-circuit board 42 facing the back cover 30, and is connected to the sub-circuit board 42 and the center 20, respectively. In this way, on the one hand, by fixing the sub-circuit board holder to the middle frame 20, the reliability of fixing the sub-circuit board 42 can be improved; on the other hand, the secondary circuit board support also serves to space the electronic device on the secondary circuit board 42 from the back cover 30, so that the back cover 30 can be prevented from deforming to strike the electronic device during the falling of the electronic device 1 to cause damage to the electronic device. It will be appreciated that in other examples, the secondary circuit board holder may not be provided in the electronic device 1.

The battery 60 is located in the first cavity K1. And the battery 60 is located between the main circuit board 41 and the sub circuit board 42. The battery 60 is used to supply power to the main circuit board 41, the sub circuit board 42, the screen 10, the camera module 70, the speaker 90, and the like. Battery 60 may include, but is not limited to, a nickel-cadmium battery, a nickel-hydrogen battery, a lithium battery, or other types of batteries. In addition, the number of the batteries 60 in the embodiment of the present application may be multiple or one, and the specific number and arrangement of the batteries 60 in the embodiment of the present application may be set according to actual needs.

In some embodiments, the surface of the middle plate 22 facing the back cover 30 is provided with a first blocking rib 221 and a second blocking rib 222. The first blocking rib 221 and the second blocking rib 222 protrude from the surface of the middle plate 22 facing the back cover 30. The first blocking rib 221 extends in the X-axis direction, and both ends of the first blocking rib 221 in the X-axis direction are connected to opposite inner sides of the frame 21, the second blocking rib 222 extends in the X-axis direction, and both ends of the second blocking rib 222 in the X-axis direction are connected to opposite inner sides of the frame 21. The first blocking rib 221 and the second blocking rib 222 are disposed at intervals in the Y-axis direction. In this way, the frame 21, the middle plate 22, the first blocking rib 221, and the second blocking rib 222 may enclose the mounting groove 22a for mounting the battery 60. The portion of the frame 21 on the side of the first blocking rib 221 remote from the second blocking rib 222, the middle plate 22, and the first blocking rib 221 may enclose a first installation space 22m for installing the main circuit board 41. The portion of the frame 21 on the side of the second partition rib 222 remote from the first partition rib 221, the middle plate 22, and the second partition rib 222 may enclose a second installation space 22n for installing the sub-circuit board 42.

In order to improve the connection strength between the first blocking rib 221 and the middle plate 22, the first blocking rib 221 and the middle plate 22 may be integrally formed. Of course, the present application is not limited thereto, and the first partition rib 221 may be assembled with the middle plate 22, and exemplary connection manners of the first partition rib 221 with the middle plate 22 include, but are not limited to, gluing, welding, screw connection or clamping connection.

In order to improve the connection strength between the second partition rib 222 and the middle plate 22, the second partition rib 222 and the middle plate 22 may be integrally formed. Of course, the present application is not limited thereto, and second spacer bar 222 may be assembled with middle plate 22, and exemplary manners of connecting second spacer bar 222 to middle plate 22 include, but are not limited to, gluing, welding, screwing, or clamping.

In other embodiments, the first and second blocking ribs 221 and 222 may be formed on a surface of the back cover 30 facing the middle plate 22. Specifically, the first blocking rib 221 and the second blocking rib 222 on the back cover 30 may be integrally formed with the back cover 30, or may be assembled by gluing, welding or clamping. Alternatively, in other embodiments, neither the middle plate 22 nor the back cover 30 have the first and second shut-off ribs 221, 222 disposed thereon.

The camera module 70 is used for taking pictures/videos. Exemplary types of camera modules 70 may include, but are not limited to, wide angle camera modules, tele camera modules, main camera modules, and the like. In some embodiments, in order to improve the shooting quality of the electronic device 1, the number of camera modules 70 is multiple. Wherein "plurality" means two or more. For example, as shown in fig. 2, the camera modules 70 are five. Of course, it is understood that in other examples, the number of camera modules 70 may be one.

The camera module 70 is fixed to the surface of the middle plate 22 facing the back cover 30. Illustratively, the camera module 70 is secured to the surface of the middle plate 22 facing the back cover 30 by screwing, clamping, welding, or gluing.

The main circuit board 41 is provided with an avoidance through hole 41a at a position corresponding to the camera module 70, and the camera module 70 is positioned in the avoidance through hole 41 a. In this way, the camera module 70 and the main circuit board 41 have an overlapping area, thereby avoiding the camera module 70 from increasing the thickness of the electronic apparatus 1 in the Z-axis direction due to stacking on the main circuit board 41. In other examples, the camera module 70 may also be fixed to the surface of the main circuit board 41 facing the back cover 30. The camera module 70 is electrically connected to the main circuit board 41. In this way, the camera module 70 may receive signals from the main circuit board 41 and may also send signals to the main circuit board 41.

When the electronic device 1 further comprises a main circuit board holder 51, at least part of the camera module 70 may be located between the main circuit board 41 and the main circuit board holder 51 described above. The camera module 70 is abutted against the main circuit board bracket 51, so that the camera module 70 can be fixed by using the main circuit board bracket 51. The main circuit board bracket 51 is provided with a light passing hole 51b corresponding to the camera module 70 so that the camera module 70 receives light.

With continued reference to fig. 2 and 3, the back cover 30 is provided with a mounting opening 30a. The shape of the mounting opening 30a includes, but is not limited to, circular, rectangular, triangular, or contoured. The mounting opening 30a penetrates the back cover 30 in the thickness direction (i.e., Z-axis direction) of the back cover 30. The mounting port 30a corresponds to the camera module 70. The camera decorative cover 80 is fixedly connected with the back cover 30, and seals the mounting opening 30a. In this way, the camera module 70 can be protected by the camera decorative cover 80, and also can function as a decorative electronic device 1.

With continued reference to fig. 2 and 3, the camera trim cover 80 includes: a decorative member 81 and a light-transmitting cover 82.

The garnish 81 is fixed to the back cover 30 and closes the mounting opening 30a. The manner of attachment between the trim 81 and the back cover 30 includes, but is not limited to, gluing. The ornament 81 is provided with a camera hole 812a. The camera hole 812a penetrates the garnish 81 in the thickness direction (i.e., the Z-axis direction) of the garnish 81. The number of the camera holes 812a is the same as and corresponds to the number of the camera modules 70, so that the camera modules 70 can receive external light through the corresponding camera holes 812a.

The material of the decorative piece 81 includes, but is not limited to, plastic, metal, or a combination of plastic and metal. The shape of the peripheral outline of the ornamental piece 81 includes, but is not limited to, square, rectangle, circle, oval, or special-shape.

With continued reference to FIG. 3, trim 81 includes a body 811, a cover 812, and an annular flange 813.

The cylindrical body 811 has a cylindrical shape. The shape of the cylindrical body 811 includes, but is not limited to, a square cylindrical shape, a rectangular annular cylindrical shape, a circular annular cylindrical shape, an elliptical annular cylindrical shape, or a deformed cylindrical shape. The material of the body 811 includes, but is not limited to, plastic, metal, or a combination of plastic and metal. The tubular body 811 is provided through the mounting opening 30a.

The cover 812 has a flat sheet shape. The shape of the cover portion 812 includes, but is not limited to, square, rectangular, circular, oval, or contoured. The material of the cover 812 includes, but is not limited to, plastic, metal, or a combination of plastic and metal. A camera hole 812a is formed on the cover body 812.

The lid 812 is surrounded by the tubular body 811 and is connected to the outer end of the inner peripheral surface of the tubular body 811, that is, the outer end of the inner peripheral surface of the tubular body 811 is connected to the periphery of the lid 812. In order to improve the connection strength between the lid 812 and the tubular body 811, the lid 812 and the tubular body 811 may be integrally formed. Of course, the present application is not limited thereto, and the cover 812 and the body 811 may be assembled and connected, and exemplary connecting means of the cover 812 and the body 811 include, but are not limited to, gluing, welding, screw connection, or clamping.

The annular flange 813 is annular in shape. The shape of annular rim 813 includes, but is not limited to, a square ring shape, a rectangular ring shape, a circular ring shape, an elliptical ring shape, or a shaped ring. The material of the annular flange 813 includes, but is not limited to, plastic, metal, or a combination of plastic and metal.

With continued reference to fig. 3, an annular flange 813 is connected to an inner end of the outer peripheral surface of the cylindrical body 811 (i.e., an end adjacent to the inside of the electronic apparatus 1). In order to improve the connection strength between annular flange 813 and cylindrical body 811, annular flange 813 and cylindrical body 811 may be integrally formed. Of course, the application is not limited thereto, and annular flange 813 and barrel 811 may be assembled and connected, and exemplary connection means of cover 812 and barrel 811 include, but are not limited to, gluing, welding, screw connection or snap-fit.

The annular flange 813 is fixed to a portion of the inner surface of the back cover 30 (i.e., the surface facing the inside of the electronic device 1) around the mounting opening 30 a. Illustratively, the annular flange 813 may be glued to the inner surface of the back cover 30. The gluing mode can realize the fixed connection of the decoration 81 and the back cover 30 on one hand, and can also play a certain sealing role on the other hand, so that the sealing effect is improved.

The light-transmitting cover 82 is flat. The light-transmitting cover 82 may be, for example, rectangular flat plate, square flat plate, or circular flat plate. The light-transmitting cover 82 is located on a side of the cover 812 away from the camera module 70. The light-transmitting cover 82 is laminated and fixedly coupled to the cover portion 812. Thus, the light-transmitting cover 82 can cover the camera hole 812a conveniently, so that the camera module 70 can be protected from water and dust. And, since the transparent cover 82 transmits light, the light can penetrate through the transparent cover 82 and enter the light incident surface of the camera module 70 through the camera hole 812 a.

The connection between the light-transmitting cover 82 and the decoration 81 includes, but is not limited to, gluing, clamping, welding, or screwing. The material of the transparent cover 82 includes, but is not limited to, glass, plastic or ceramic.

In some examples, the light-transmitting cover 82 may be a filter with a filtering function, so that the light-transmitting cover 82 may replace the filter in the camera module 70 to perform the filtering function, so that the filter in the camera module 70 may be omitted, and the volume of the camera module 70 may be reduced.

The speaker 90 is used to convert audio electrical signals into sound signals. The electronic device 1 is provided with a sound outlet (not shown in fig. 1-3), and the sound signal emitted by the speaker 90 can be transmitted to the outside of the electronic device 1 through the sound outlet. In some embodiments, the speaker 90 may be electrically connected to the main circuit board 41. The voice electric signal transmitted from the main circuit board 41 is transmitted to the speaker 90, and further converted into a sound signal output through the speaker 90. In other examples, speaker 90 may also be electrically connected to secondary circuit board 42.

With continued reference to fig. 2, a communication hole 22b is formed in the middle plate 22, and the communication hole 22b penetrates the middle plate 22 in the thickness direction (i.e., the Z-axis direction) of the middle plate 22. The shape of the communication hole 22b includes, but is not limited to, a circle, square, rectangle, diamond, triangle, or a special shape.

Referring to fig. 4 and 5, fig. 4 is a schematic cross-sectional structure of the electronic device 1 shown in fig. 1 at line A2-A2, and fig. 5 is an enlarged view of a circled portion of the electronic device 1 at F shown in fig. 4. The speaker 90 is located within the first cavity K1. The speaker 90 is fixed to the middle plate 22, and closes the communication hole 22b.

In the specific example shown in fig. 4 and 5, the speaker 90 is fixed to the middle plate 22 in the area overlapping the main circuit board 41, and in order to prevent interference between the main circuit board 41 and the speaker 90, the main circuit board 41 is provided with a relief hole 41b, and the speaker 90 is inserted into the relief hole 41b. In other examples, the speaker 90 may be fixed to the middle plate 22 in a region overlapping with the secondary circuit board 42, and in order to prevent interference between the secondary circuit board 42 and the speaker 90, the secondary circuit board 42 is provided with a vent hole, and the speaker 90 is disposed through the vent hole on the secondary circuit board. Alternatively, in other examples, the speaker 90 is located at the outer periphery of the circuit board 40. In the following description, an area overlapping with the main circuit board 41 where the speaker 90 is fixed to the middle board 22 will be described as an example.

With continued reference to fig. 5, the inner peripheral wall of the communication hole 22b and the speaker 90 may define a front cavity K3 of the speaker 90, and the front cavity K3 communicates with the aforementioned sound outlet 100. In this way, the speaker 90 operates to vibrate the air in the front cavity K3 to generate sound, and the sound is transmitted out of the electronic device 1 through the sound output hole 100.

It should be noted that "the speaker 90 is located in the first cavity K1" includes the following two cases: the first case means that the speaker 90 is entirely within the first chamber K1 and is located on the side of the communication hole 22b near the back cover 30. The second case means that a part of the speaker 90 is located in the first chamber K1 and the rest is located in the communication hole 22 b. As long as the speaker 90 is ensured to be able to block the communication hole 22b, and at least a part of the inner peripheral wall of the communication hole 22b and the speaker 90 may enclose the front cavity K3 of the speaker 90.

In this embodiment, by providing the communication hole 22b on the middle plate 22 and forming the front cavity K3 with at least a part of the space of the communication hole 22b, it is advantageous to achieve compactness of the structure of the electronic apparatus 1, without additionally providing the front cavity K3 in a space other than the middle plate 22, and it is advantageous to reduce the thickness of the electronic apparatus 1.

In other examples, the sound outlet may be provided at a portion of the frame 21 between the middle plate 22 and the back cover 30, in which case the middle plate 22 may not be provided with the communication hole 22b, and the speaker 90 may be located between the middle plate 22 and the back cover 30.

Referring to fig. 6 and 7, fig. 6 is a perspective view of a middle frame 20 of the electronic device 1 shown in fig. 1-3; fig. 7 is an enlarged view of a circled portion at G according to the middle frame 20 shown in fig. 6. In this embodiment, a groove 213 recessed toward a direction away from the central axis of the bezel 21 is formed on a part of the inner peripheral wall of the bezel 21. The groove 213 is located on a side of the middle plate 22 away from the back cover 30, and the groove 213 extends to an end surface of the frame 21 in a direction away from the back cover 30. The portion of the outer peripheral surface of the screen 10 opposite to the groove 213 and the groove 213 together define the sound hole 100 (refer to fig. 5). By this arrangement, the sound outlet 100 can have a certain hiding effect, and the appearance of the electronic apparatus 1 can be improved.

In other examples, the sound outlet 100 may be directly formed on the frame 21, and the sound outlet 100 penetrates the frame 21 in the thickness direction of the wall plate of the frame 21. In other examples, the sound outlet hole 100 may also be formed directly using an assembly gap between a portion of the outer peripheral surface of the screen 10 and a portion of the inner peripheral surface of the bezel 21. Of course, the present application is not limited thereto, and in other examples, the sound outlet 100 may be formed on the screen 10, for example, the sound outlet 100 may be formed in a non-display area of the screen 10.

With continued reference to fig. 7, a sound guide groove 22e recessed toward the back cover 30 is formed on the surface of the middle plate 22 facing the screen 10. One end of the sound guiding groove 22e extends to an edge of the communication hole 22b to communicate with the communication hole 22b, and the other end of the sound guiding groove 22e extends toward a direction approaching the groove 213 to communicate with the groove 213. The sound guiding groove 22e communicates the communication hole 22b with the groove 213. The display screen 12 covers the open mouth of the sound guide groove 22e (see fig. 5). The display 12 and the sound guide groove 22e can define a sound guide passage that communicates the sound outlet hole 100 and the communication hole 22 b. Thereby facilitating the transmission of sound at the communication hole 22b to the sound outlet hole 100 via the sound guiding passage, and then from the sound outlet hole 100 to the outside of the electronic apparatus 1.

It is understood that the configuration of the sound guide channel is not limited thereto, and in other examples, the sound guide channel 22e may be formed on the surface of the screen 10 facing the middle plate 22, and the middle plate 22 may cover the opening of the sound guide channel 22e, where the middle plate 22 and the sound guide channel 22e define the sound guide channel. Alternatively, the surface of the screen 10 facing the middle plate 22 and the surface of the middle plate 22 facing the screen 10 are formed with the sound guiding grooves 22e, and the sound guiding grooves 22e on the screen 10 are opposite to and communicate with the sound guiding grooves 22e of the middle plate 22 to define the sound guiding channels.

Of course, it is understood that in other examples, the communication hole 22b may be in communication with the sound outlet 100 without a sound guide channel, and the communication hole 22b may be in direct communication with the sound outlet 100. For example, when the communication hole 22b extends to the outer edge of the middle plate 22 in the plane of the middle plate 22 to communicate with the groove 213, it may not be necessary to provide a sound guide passage at this time.

With continued reference to fig. 7, the width d2 of the sound guiding groove 22e gradually increases in the direction from the communication hole 22b to the recess 213. That is, the sound guide groove 22e is formed in a flare shape. Thus, smooth communication between the sound guide channel and the sound outlet 100 is ensured, and the sound guide effect of the sound guide channel is improved. Of course, the present application is not limited thereto, and in other examples, the width of the sound guiding groove 22e may be constant or the width d2 of the sound guiding groove 22e may be gradually reduced in the direction from the communication hole 22b to the recess 213. That is, the sound guide groove 22e is formed in a flare shape.

Specifically, the extension length d1 of the sound outlet hole 100 along the circumferential direction of the bezel 21 is equal to the width of the end of the sound guiding groove 22e adjacent to the sound outlet hole 100. That is, d1 is equal to d2 at its maximum value. Thus, the smoothness of sound output is guaranteed. In other examples, the maximum values of d1 and d2 may not be equal.

On the basis of the above embodiment, referring to fig. 8, fig. 8 is a schematic diagram illustrating the cooperation between the middle frame 20 and the adhesive layer 110 in the electronic device 1 shown in fig. 1-3. In order to increase the connection strength of the middle plate 22 with the screen 10, the electronic device 1 further comprises an adhesive layer 110. An adhesive layer 110 is disposed between the middle plate 22 and the screen 10. Specifically, the adhesive layer 110 is a closed ring shape provided in the circumferential direction of the middle plate 22. By this arrangement, the material of the adhesive layer 110 can be saved, and the material cost can be reduced. Illustratively, the adhesive layer 110 is of uniform material. The adhesive layer 110 is an integral structure, or may be formed by splicing multiple segments of the same material. In other examples, the adhesive layer 110 may be formed by splicing different materials (e.g., back adhesive and dispensing).

Specifically, in order to improve the waterproof and dustproof effects, the adhesive layer 110 has a first adhesive segment 1101 and a second adhesive segment 1102 on the basis of saving material cost. Wherein a first glue segment 1101 (e.g., the area filled with "mesh" in fig. 8) is provided along the edges of the communication holes 22b and the sound guiding grooves 22 e. Thus, a vacant area corresponding to the communication hole 22b and the sound guiding groove 22e can be defined. Therefore, the first glue segment 1101 can be used for sealing the space between the edge of the sound guide groove 22e and the communication hole 22b on the middle plate 22 and the display screen 12, and water vapor and the like outside the electronic equipment 1 are prevented from entering the gap between the display screen 12 and the middle plate 22. In addition, since the first adhesive section 1101 has a certain thickness, the height of the front cavity K3 in the Z-axis direction is increased, the flow area of the sound guide channel is increased, and the sound output effect of the speaker 90 is improved.

The second glue segment 1102 is the remainder of the glue layer 110 other than the first glue segment 1101, and the second glue segment 1102 (e.g., the area filled with "honeycomb pattern" in fig. 8) is disposed along the edge of the middle plate 22. This arrangement ensures both a waterproof effect between the centering plate 22 and the middle part of the display screen 12 and a saving in material.

It is to be understood that the number of the first glue segments 1101 is not limited to one shown in fig. 8, and when the communication holes 22b and the sound guiding grooves 22e are plural as a whole, the first glue segments 1101 are plural as long as one first glue segment 1101 is ensured to correspond to one communication hole 22b and one sound guiding groove 22e as a whole.

The adhesive layer 110 includes, but is not limited to, one or more of UV glue (also known as shadowless glue), polyurethane, silicone rubber, polysulfide rubber, neoprene, and epoxy sealants. Alternatively, the adhesive layer 110 may be a back adhesive, or may be a glue layer made by a dispensing process.

In other examples, to simplify the structure of the adhesive layer 110 and improve the connection strength between the middle plate 22 and the display screen 12, the adhesive layer 110 may be a whole layer structure stacked between the middle plate 22 and the display screen 12, and the adhesive layer 110 has a void area, where the void area is opposite to the sound guiding slot 22e and the communication hole 22 b.

On the basis of any of the above embodiments, please refer to fig. 9, fig. 9 is a front view of the structure shown in fig. 5. The electronic device further comprises a housing structure 120. The housing structure 120 is secured within the shell. The housing structure 120 cooperates with the speaker 90 to enclose the rear sound cavity K41 of the speaker 90. The housing structure 120 has a first opening 1203. The shape of the first opening 1203 includes, but is not limited to, circular, rectangular, triangular, hexagonal, or shaped.

The first opening 1203 communicates the rear sound chamber K41 and the first chamber K1 so that the first chamber K1 is formed as a capacity-expanding rear chamber of the speaker 90. Thus, the low frequency performance of the speaker 90 is advantageously improved.

It is understood that only the first chamber K1 may be utilized as the capacity-expanded chamber of the speaker 90. In other examples, a space (for example, an assembly gap between the display screen 12 and the middle plate 22) isolated from the above-mentioned sound guiding channel in the second cavity K2 may be further communicated with the first cavity K1, so that the partial space and the first cavity K1 together form a volume-expanded cavity of the speaker 90. The housing is provided with a capacity-expansion rear cavity of the speaker 90, and the capacity-expansion rear cavity and the rear sound cavity K41 are communicated through the first opening 1203, so that the capacity-expansion rear cavity and the rear sound cavity K41 form a rear cavity K4 of the speaker 90.

With continued reference to fig. 9, and with reference to fig. 10, fig. 10 is a cross-sectional view of a speaker 90 according to the structure shown in fig. 9. The loudspeaker 90 comprises a driving device 92 and a diaphragm 91.

The driving device 92 is located in the first cavity K1 and is fixed to the middle plate 22. The driving device 92 is located on one side in the thickness direction of the diaphragm 91.

With continued reference to fig. 9 and 10, drive device 92 includes a frame 921, voice coil 922, and magnetic circuit system 923.

The frame 921 serves as a "supporting skeleton" of the speaker 90 for supporting the diaphragm 91 and fixing the magnetic circuit system 923. The frame 921 may be made of materials including, but not limited to, metal, plastic, and combinations thereof.

The speaker 90 may be secured to the midplane 22 with a frame 921. Exemplary means of connection between the frame 921 and the midplane 22 include, but are not limited to, gluing, clamping, welding, or screw connection.

The diaphragm 91 is fixed to the surface of the frame 921 facing the screen 10. The diaphragm 91 is attached to the frame 921 by, but not limited to, gluing, clamping, welding, or screwing. The diaphragm 91 blocks the communication hole 22b. The outer surface of the diaphragm 91 and the inner peripheral wall of the communication hole 22b may define the front cavity K3 described above. The rear sound chamber K41 is on the side toward which the inner surface of the diaphragm 91 faces. That is, the front cavity K3 and the rear cavity K41 are on both sides of the diaphragm 91.

It should be noted that, the "outer surface" of the diaphragm 91 refers to a surface of the diaphragm 91 facing away from the interior of the speaker 90, that is, a side of the diaphragm 91 that vibrates to sound. The surface of the diaphragm 91 opposite thereto is referred to as an "inner surface".

Voice coil 922 is located within frame 921. And voice coil 922 is attached to the inner surface of diaphragm 91. The connection of voice coil 922 to diaphragm 91 may include, but is not limited to, adhesive, snap fit, solder, or screw connection.

Magnetic circuit 923 is mounted in frame 921 on the side toward which the inner surface of diaphragm 91 faces. Magnetic circuit 923 has annular magnetic gap 923a. The portion of voice coil 922 remote from diaphragm 91 may extend into magnetic gap 923a. It will be appreciated that in other embodiments, when the voice coil is a planar voice coil, the voice coil may not extend into the magnetic gap. The planar voice coil may be manufactured by winding, or by means of printed wiring.

A vibration space K7 is formed between the magnetic circuit system 923 and the diaphragm 91. Magnetic circuit 923 cooperates with voice coil 922 to drive diaphragm 91 to vibrate in vibration space K7. Specifically, when voice coil 922 is energized, an induced magnetic field is generated, and magnetic circuit 923 is configured to respond to the induced magnetic field and apply a driving force to voice coil 922, so that voice coil 922 is displaced by the magnetic driving action of magnetic circuit 923, and diaphragm 91 is driven to vibrate. Vibration of the diaphragm 91 may push air in the front cavity K3 to vibrate to form an acoustic wave, and the acoustic wave is transmitted to the outside of the electronic apparatus 1 through the sound outlet 100, so that a user can receive the acoustic wave.

Since the vibration of the diaphragm 91 causes air to circulate in the front chamber K3 and the rear chamber K4, the driving device 92 may have a ventilation passage (not shown) therein in order to facilitate the flow of air. The ventilation passage communicates the vibration space K7 and the rear sound chamber K41. The ventilation passage includes, but is not limited to, a hole formed in the frame 921, a hole formed in the magnetic circuit system 923, an assembly gap between the magnetic circuit system 923 and the frame 921, and the like. So long as the drive 92 is provided with a vent passage. The specific structure and operation of the speaker are well known to those skilled in the art, and will not be described in detail herein.

With continued reference to fig. 9, the housing structure 120 includes the middle plate 22, the cavity plate 1201, and the enclosure 1202 described above.

The sound cavity plate 1201 is flat. The cavity plate 1201 may be, for example, rectangular flat plate, square flat plate, or circular flat plate. The materials of the acoustic cavity plate 1201 include, but are not limited to, metal, plastic, and combinations thereof.

The sound cavity plate 1201 is fixed in the first cavity K1. The acoustic chamber plate 1201 is on the side of the speaker 90 remote from the midplane 22. That is, in the Z-axis direction, the sound chamber plate 1201 is between the speaker 90 and the back cover 30.

The enclosure 1202 is annular. Illustratively, the enclosure 1202 is annular, square annular, triangular annular, or contoured annular. The material of the enclosure 1202 includes, but is not limited to, metal, plastic, and combinations thereof.

A baffle 1202 is connected between the middle plate 22 and the voice cavity plate 1201 and is disposed around the speaker 90 in the entire circumference of the speaker 90. The diaphragm 91, enclosure 1202, middle plate 22, and acoustic cavity plate 1201 of the speaker 90 collectively enclose a rear acoustic cavity K41. Thus, on one hand, the diaphragm, the enclosure 1202, the middle plate 22 and the sound cavity plate 1201 of the speaker 90 are utilized to jointly enclose the rear sound cavity K41, which is beneficial to improving the tightness of the rear sound cavity K41, and on the other hand, the diaphragm 91, the enclosure 1202 and the sound cavity plate 1201 of the middle plate 22 and the speaker 90 are utilized to jointly enclose the rear sound cavity K41, which is beneficial to reducing the material cost and saving the space inside the electronic device 1.

Of course, it will be understood that in other examples, instead of the middle plate 22, other plates may be used to enclose the rear sound cavity K41 with the diaphragm 91, the enclosure 1202, and the sound cavity plate 1201 of the speaker 90.

To facilitate communication of the rear sound chamber K41 with the volume-expanding rear chamber, a first opening 1203 may be provided on the enclosure 1202. In other examples, the first opening 1203 may also be formed in the cavity plate 1201.

On this basis, in order to further reduce the material cost and save the space inside the electronic device 1, the main circuit board holder 51 may include the above-mentioned sound cavity plate 1201, that is, the above-mentioned sound cavity plate 1201 may be defined by at least a portion of the main circuit board holder 51.

With continued reference to fig. 9, the enclosure 1202 includes a first rib 12021 and a second rib 12022.

Specifically, referring to fig. 11, fig. 11 is a schematic diagram illustrating the cooperation between the middle frame 20 and the speaker 90 shown in fig. 1-3. The first rib 12021 is annular. The first rib 12021 is in a circular ring shape, a square ring shape, a triangular ring shape, or a special ring shape.

The first rib 12021 is fixed to the surface of the middle plate 22 facing the back cover. And is disposed around the speaker 90 in the entire circumference of the speaker 90. In this way, on the one hand, the structural strength of the middle plate 22 can be enhanced, and on the other hand, the first blocking rib 12021 is also beneficial to playing a role in positioning the loudspeaker 90, so as to improve the assembly efficiency.

The first blocking rib 12021 and the middle plate 22 may be an integral part, that is, the first blocking rib 12021 and the middle plate 22 are an integral structure. The arrangement is beneficial to improving the connection strength between the first blocking rib 12021 and the middle plate 22, and can simplify the production process and reduce the production cost. Of course, the first rib 12021 and the middle plate 22 may also be separate molded parts, which are assembled and connected. The first rib 12021 may be coupled to the middle plate 22 by, but not limited to, gluing, clamping, welding, or screwing.

Referring to fig. 12, fig. 12 is a perspective view of the cavity plate 1201 shown in fig. 9. The second ribs 12022 are fixed to the surface of the sound cavity plate 1201 facing the middle plate 22. The second ribs 12022 are provided on the outer periphery of the speaker 90 in the circumferential direction of the speaker 90. In this way, on one hand, the structural strength of the sound cavity plate 1201 can be enhanced, and on the other hand, the second blocking rib 12022 is also beneficial to positioning the sound cavity plate 1201 and the speaker 90, so that the assembly efficiency is improved.

The second rib 12022 and the sound cavity plate 1201 may be an integral part, that is, the second rib 12022 and the sound cavity plate 1201 are an integral structure. The arrangement is beneficial to improving the connection strength between the second blocking rib 12022 and the sound cavity plate 1201, simplifying the production process and reducing the production cost. Of course, the second rib 12022 and the sound cavity plate 1201 may be separate molded parts, and the two may be assembled and connected. The second ribs 12022 may be attached to the sound cavity plate 1201 by, but not limited to, gluing, clamping, welding, or screwing, etc. The second rib 12022 has a first opening 1203 at one circumferential end.

The end of the second blocking rib 12022 far away from the sound cavity plate 1201 is in sealing connection with the end of the first blocking rib 12021 far away from the middle plate 22.

For example, the second rib 12022 and the first rib 12021 may be sealed by using a sealant (not shown). In other examples, the second rib 12022 may abut the first rib 12021 to achieve a sealed connection.

In this embodiment, the enclosure 1202 is divided into the first rib 12021 and the second rib 12022, which can be more convenient to manufacture.

It will be appreciated that in other examples, the enclosure 1202 may be an integral structure formed by integrally connecting the first rib 12021 and the second rib 12022, where the enclosure 1202 may be fixed to the middle plate 22 and connected to the cavity plate 1201 in a sealing manner, or the enclosure 1202 may be fixed to the cavity plate 1201 and connected to the middle plate 22 in a sealing manner.

With continued reference to fig. 12, the area of the surface of the sound chamber plate 1201 facing the speaker 90 surrounded by the enclosure 1202 is recessed away from the middle plate 22 to form a rear sound slot 1205. Thus, on the one hand, when the size of the enclosure 1202 in the Z direction is kept unchanged, it is advantageous to increase the volume of the rear sound chamber K41 by the rear sound groove 1205, and to improve the low frequency effect of the speaker 90. On the other hand, the size of the enclosure 1202 along the Z-axis direction is reduced on the premise of ensuring that the volume of the rear sound cavity K41 is unchanged, so that the thickness of the electronic device 1 is further reduced, and the thin design of the electronic device 1 is realized.

In some embodiments, please refer to fig. 13 in conjunction with fig. 9, wherein fig. 13 is an exploded view of the cavity plate 1201 according to fig. 12, and the cavity plate 1201 includes: a body plate 12011 and a cover plate 12012.

The body plate 12011 is flat. The body plate 12011 has a through hole 120111 penetrating the body plate 12011 in the thickness direction of the body plate 12011. The shape of the through hole includes, but is not limited to, circular, rectangular, elliptical, or shaped.

The cover plate 12012 has a flat plate shape. The shape of the cover plate 12012 includes, but is not limited to, a rectangular flat plate shape, a circular flat plate shape, a triangular flat plate shape, or a special shape.

The cover plate 12012 is disposed on a side of the body plate 12011 remote from the speaker 90. Thereby, the cover plate 12012 and the speaker 90 are respectively on both sides in the thickness direction of the body plate 12011. The cover plate 12012 closes off the through hole 120111 to define the rear sound groove 1205 with the through hole 120111. Thus, by providing the sound cavity plate 1201 to include the body plate 12011 and the cover plate 12012, the sound cavity plate 1201 and the cover plate 12012 are simple in structure, and the sound cavity plate 1201 is easy to manufacture.

Exemplary means of connection between the cover plate 12012 and the body plate 12011 include, but are not limited to, gluing.

In order to reduce the vibration of the housing caused by the operation of the speaker 90, with continued reference to fig. 9, the housing structure 120 is provided with a second opening 1204. The shape of the second opening 1204 includes, but is not limited to, circular, rectangular, triangular, hexagonal, or shaped. The second opening 1204 is disposed spaced apart from the first opening 1203.

The electronic device 1 further comprises an acoustic resonance structure 130. The acoustic resonant structure 130 is secured to the housing. The acoustic resonant structure 130 has a resonant cavity K5. The resonant cavity K5 has an opening K53. The shape of the opening K53 includes, but is not limited to, circular, rectangular, triangular, hexagonal, or shaped.

The opening K53 communicates with the second opening 1204. Thus, when the speaker 90 works, the vibration sound wave in the rear sound cavity K41 can be transmitted into the resonant cavity K5, and the resonant cavity K5 can absorb the sound wave energy of the rear sound cavity K41, so that the impact force of the airflow flowing into the capacity-expanded rear cavity from the rear sound cavity K41 to the shell is weakened, the vibration phenomenon of the shell is reduced, and the use experience of a user is improved. In addition, compared with the mode of placing the resonant cavity K5 in the volume-expanding rear cavity, the resonant cavity K5 and the volume-expanding rear cavity are communicated to the rear sound cavity K41 in a parallel mode, so that the problem that the vibration reduction effect of the resonant cavity K5 is poor due to the fact that sound waves enter the volume-expanding rear cavity first and then enter the resonant cavity K5 is solved to at least a certain extent, and the vibration reduction effect is further improved.

The number of acoustic resonant structures 130 may be one or more, for example. When the number of the acoustic resonance structures 130 is plural, the plural acoustic resonance structures 130 may be independent from each other, and their resonance cavities K5 may not communicate. Of course, when the number of the acoustic resonance structures 130 is plural, the resonance cavities K5 of the plural acoustic resonance structures 130 may also be communicated. The present application is not particularly limited thereto.

In some examples, the volume of the rear sound cavity K41 is 5 mm ³ ~500 mm ³ . Exemplary, the volume of the rear sound cavity K41 is 50 mm ³ ~300mm ³ . For example, the volume of the rear sound chamber K41 is 100 mm ³ 、150 mm ³ 、200 mm ³ 、250 mm ³ 、280 mm ³ Or 290mm ³ . In this way, it is advantageous to ensure that the housing structure 120 has a relatively large size, that there is enough space in the housing structure to arrange the first opening 1203 and the second opening 1204, and that the low frequency effect of the speaker 90 is improved.

In some examples, to reduce the low frequency performance of the speaker 90 while ensuring the vibration reduction effect, the opening area of the second opening 1204 is smaller than the opening area of the first opening 1203. Thereby, be favorable to setting up the less with the second opening 1204 to in order to improve resonant cavity K5's damping effect, on the other hand, be favorable to guaranteeing that the size of first opening 1203 is great, improve the smoothness of back sound chamber K41 and dilatation back chamber intercommunication, improve the low frequency effect of speaker 90.

Specifically, the opening area of the first opening 1203 is 1 mm or more ² . Exemplary, the first opening 1203 has an opening area of greater than or equal to 5 mm ² . For example, the value of the opening area of the first opening 1203 is 6 mm ² 、6.5 mm ² 、7 mm ² 、7.5 mm ² 、8 mm ² 、8.5 mm ² 、9 mm ² Or 10 mm ² 。

In order to facilitate the smooth entry of the air flow into the air guide passage K52, the opening area of the second opening 1204 is larger than the cross-sectional area of the air guide passage K52. In other examples, the opening area of the second opening 1204 may also be equal to the cross-sectional area of the gas guide passage K52.

The present application is not limited thereto, and the opening area of the second opening 1204 may be smaller than the cross-sectional area of the gas guide passage K52.

Exemplary, the cross-sectional area of the gas-guiding passage K52 has a value of 0.1 mm ² ~3 mm ² . For example, the cross-sectional area of the air guide passage K52 has a value of 0.2 mm ² 、0.5 mm ² 、0.6 mm ² 、0.8 mm ² 、1 mm ² 、1.2 mm ² 、1.5 mm ² 、1.8 mm ² 、2 mm ² 、2.3 mm ² 、2.5 mm ² Or 2.8. 2.8 mm ² 。

With continued reference to fig. 9, in the present application, the resonant cavity K5 is a helmholtz resonant cavity. Specifically, the resonator K5 includes a resonator body K51 and an air guide channel K52. The shape of the cavity body K51 includes, but is not limited to, spherical, cubic, triangular prism, irregular, and combinations thereof. The shape of the cross-section of the air guide channel K52 includes, but is not limited to, circular, triangular, square, or profiled.

The air guide channel K52 communicates with the resonator body K51. The opening K53 is formed at the air guide passage K53. The volume of the air guide channel K52 is smaller than that of the resonant cavity body K51. The cross-sectional area of the air guide passage K52 is smaller than the cross-sectional area of the resonator body K51. The resonator body K51 may provide sound volume. The air guide channel K52 may provide an acoustic mass. Therefore, the resonant cavity K5 is simple in structure, convenient to process and manufacture and good in vibration reduction effect.

It should be noted that the cross section of the air guide passage K52 refers to a cross section perpendicular to the length direction of the air guide passage K52. Specifically, as shown in fig. 9, the length direction of the air guide channel K52 coincides with the Y direction, and the cross section of the air guide channel K52 is parallel to the plane defined by XZ. The cross section of the resonator body K51 refers to a cross section parallel to the cross section of the air guide channel K52.

In order to save materials, reduce costs, and at the same time improve the compactness of the electronic device 1. With continued reference to fig. 9, the acoustic resonant structure 130 includes the trim 81 and the resonant panel 1301 described above.

The resonant plate 1301 is located within the housing. The resonance plate 1301 is fixed to a surface of the decoration 81 facing the inside of the electronic apparatus 1. The resonator plate 1301 and the part of the decoration 81 where the camera hole 812a is not provided enclose a resonator cavity K5. In this way, a part of the inner wall surface of the resonant cavity can be located on the decoration 81, so that the sound resonance structure 130 and the camera decoration cover 80 can share the decoration 81, one component can be saved, the material cost is reduced, the whole structure is more compact, and the thin design of the electronic device 1 is facilitated.

Exemplary ways of connection between the resonant panel 1301 and the decorative piece 81 include, but are not limited to, gluing.

It is to be understood that, in other examples, the acoustic resonant structure 130 may not include the resonant plate 1301, but may be formed by forming all the inner wall surfaces of the resonant cavity K5 on the decorative member 81, for example, by opening the resonant cavity inside the plate body of the decorative member 81. It is sufficient to ensure that at least a part of the inner wall surface of the cavity K51 is located on the ornamental piece 81.

With reference to fig. 9, the resonant board 1301 may be the cover plate 12012, so as to further save materials, reduce cost, and improve the compactness of the electronic device 1. The second opening 1204 is an opening K53, and the second opening 1204 is formed on the cover 12012. In this way, the cover plate 12012 may be used to form the wall surface of the rear sound cavity K41 and a part of the wall surface of the resonant cavity K5, so that the cover plate 12012 is shared by the acoustic resonant structure 130 and the housing structure 120, one component can be saved, the material cost is reduced, the whole structure is more compact, and the thin design of the electronic device 1 is facilitated.

Referring to fig. 14, 15 and 16, fig. 14 is a schematic diagram illustrating the cooperation of the back cover 30, the camera trim 81 and the acoustic resonant structure 130 in the electronic device 1 shown in fig. 9, and fig. 15 is an exploded schematic diagram illustrating the structure shown in fig. 14. Fig. 16 is a schematic cross-sectional view of the structure shown in fig. 14 at line A4-A4. The resonance plate 1301 includes a main body portion 13011 and a channel portion 13012.

The body portion 13011 has a flat plate shape. Illustratively, the body portion 13011 is rectangular planar, circular planar, semicircular planar, or contoured.

The main body portion 13011 is directly opposite to the cover portion 812. The surface of the cover 812 facing the inside of the electronic device 1 is provided with ribs 812b.

The rib 812b and the cover 812 may be integrally formed, that is, the rib 812b and the cover 812 are integrally formed. The arrangement is beneficial to improving the connection strength between the convex rib 812b and the cover body 812, simplifying the production process and reducing the production cost. Of course, the rib 812b and the cover 812 may be formed separately, and they may be assembled and connected. The connection between the bead 812b and the cover 812 includes, but is not limited to, gluing, clamping, welding or screwing, etc. The shape of the bead 812b includes, but is not limited to, arcuate, dog-leg, or curvilinear.

Both ends of the bead 812b in a direction parallel to the lid body 812 are connected to the inner peripheral surface of the tubular body 811. The rib 812b, a portion of the inner peripheral surface of the cylindrical body 811 between both ends of the rib 812b, and a portion of the surface of the cover 812 facing the inside of the electronic apparatus 1 enclose a resonance open cavity K511 that is open toward the inside of the electronic apparatus 1.

The main body portion 13011 is fixed to the rib 812b and covers the open mouth of the resonance open cavity K511 to define a resonance cavity body K51 together with the resonance open cavity K511.

In this way, the space surrounded by the cylindrical body 811 and the cover 812 can be fully utilized, so that the resonator body K51 and the cylindrical body 811 of the decorative member 81 can overlap in the XY direction, which is advantageous in achieving the compactness of the electronic apparatus 1, reducing the thickness of the electronic apparatus 1, and further achieving the slim design of the electronic apparatus 1.

Illustratively, the connection between the body portion 13011 and the bead 812b includes, but is not limited to, gluing.

It will be appreciated that in other examples, the surface of the cover 812 facing the interior of the electronic device 1 may be provided with no ribs 812b, but the ribs 812b may be provided on the main body 13011. Alternatively, the bead 812b includes two portions, one portion being provided to the main body portion 13011 and the other portion being provided to the lid portion 812. The rib 812b, a part of the inner peripheral surface of the cylindrical body 811, a part of the surface of the cover 812 facing the inside of the electronic device 1, and the main body 13011 may be secured so as to enclose the resonator body K51.

In addition, it is also understood that in other examples, the rib 812b may not be provided between the cover portion 812 and the main body portion 13011, so long as the resonator body K51 is ensured to be formed between the main body portion 13011 and the cover portion 812. For example, a groove may be provided on one of the cover 812 and the main body 13011, and an opening of the groove may be blocked with the other of the cover 812 and the main body 1301 to form the resonator body K51.

Generally, the speaker 90 will cause resonance of the housing when in operation. The resonant frequency of the enclosure is typically within the operating frequency range of the speaker 90. The operating frequency of the speaker 90 is typically 20hz to 20000hz, for example, 100hz to 2000hz, which is typically small.

In order to reduce the vibration sensation of the housing, in designing the acoustic resonance structure 130, it is required that the resonance frequency of the acoustic resonance structure 130 not be too large. The resonant frequency of the acoustic resonant structure 130 is close to the resonant frequency of the housing. For example, the difference in resonance frequencies is within ±100 Hz. Optimally, the resonant frequency of the acoustic resonant structure 130 is the same as the resonant frequency of the housing. Thus, the vibration damper has better vibration damping effect.

Here, the fact that the resonant frequency of the acoustic resonant structure 130 is the same as the resonant frequency of the housing means that the resonant frequency is absolutely the same, and a certain error is allowed, for example, the difference between the resonant frequencies is within ±50Hz or ±30.

It will be appreciated that in other examples, the resonant frequency of the acoustic resonant structure 130 may be different from the resonant frequency of the housing.

Based on this, according to the design theory of the Helmholtz (Helmholtz) resonator, the resonance frequency of the acoustic resonant structure 130 satisfies the following equation one:

(equation one),

wherein f ₀ C is the velocity of the sound wave in air, which is the resonant frequency of the acoustic resonant structure 130. S is the cross-sectional area of the gas guide channel K52, d is the diameter of the gas guide channel K52, and l is the length of the gas guide channel K52. V is the volume of the resonator body K51.

As can be seen by combining the above formulas, the cross-sectional area S, the diameter d, and the length l of the air guide channel K52, and the volume of the cavity body K51 all affect the resonance frequency of the acoustic resonant structure 130. Wherein, f is the greater the volume V of the resonant cavity body K51 and the length l of the air guide channel K52 ₀ The smaller. Therefore, the purpose of adjusting the resonance frequency of the acoustic resonance structure 130 can be achieved by adjusting the cross-sectional area S, the diameter d, and the length l of the air guide passage K52, and the volume of the resonator body K51.

Based on this, with continued reference to fig. 14-16, the channel portion 13012 is planar. Illustratively, the channel portion 13012 is rectangular flat plate-like, circular flat plate-like, or shaped flat plate-like.

The channel portion 13012 is connected to the body portion 13011. Specifically, the channel portion 13012 is connected to the outer peripheral surface of the main body portion 13011.

The channel portion 13012 is secured to the inner surface of the annular flange 813 in a stacked manner. The inner surface of the annular flange 813 refers to a surface of the annular flange 813 facing the inside of the electronic device 1. The channel portion 13012 cooperates with the annular flange 813 to define an air guide channel K52. An opening K53 is formed on the channel portion 13012.

Specifically, please continue to refer to fig. 16, and referring to fig. 17, fig. 17 is a schematic structural diagram of the resonant board 1301 according to fig. 16. A portion of the surface of the channel portion 13012 facing the annular rim 813 is recessed in a direction away from the annular rim 813 to define a channel groove 130121. The annular flange 813 covers the open mouth of the channel slot 130121 to define the air guide channel K52 together with the channel slot 130121.

Because the dimension of the channel portion 13012 and the annular flange 813 in the Z direction is smaller than the dimension of the body portion 13011 and the cover portion 812 in the Z direction, the channel portion 13012 and the annular flange 813 cooperate to define the air guide channel K52, which is beneficial to reducing the dimension of the air guide channel K52 in the Z direction, thereby being beneficial to reducing the cross-sectional area of the air guide channel K52, further being beneficial to reducing the resonance frequency of the acoustic resonance structure 130, and improving the vibration reduction effect. And moreover, the structure is simple, and the processing and the manufacturing are convenient.

In some embodiments, to facilitate communication of the resonator body K51 with the air guide channel K52, while further lowering the resonant frequency of the acoustic resonant structure 130, a portion of the surface of the main body portion 13011 facing the cover portion 812 is recessed away from the cover portion 812 to define a resonant tank 130111. The resonance groove 130111 and the resonance open cavity K511 together define a resonance cavity body K51. The resonator body K51 communicates with the air guide channel K52 through the communication between the resonator groove 130111 and the channel groove 130121. Thus, the volume of the cavity body K51 can be increased, thereby facilitating the reduction of the resonance frequency of the acoustic resonance structure 130, and the structure is simple.

In particular, with continued reference to fig. 15 and 16, the annular rim 813 includes a rim body 8131 and a widened portion 8132.

The flanging body 8131 is annular. The burring body 8131 is connected to an inner end of the outer circumferential surface of the cylindrical body 811 and is provided around the mounting opening 30 a.

The widened portion 8132 is connected to the outer peripheral edge of the cuff body 8131. The widened portion 8132 protrudes from the outer peripheral edge of the burring body 8131 in a direction away from the mounting opening 30 a. A part of the open mouth of the passage groove 130121 is blocked by the burring body 8131, and the remaining part of the open mouth of the passage groove 130121 is blocked by the widened portion 8132. As such, a portion of the air guide passage K51 is formed between the burring body 8131 and the passage portion 13012, and another portion of the air guide passage K52 is formed between the widened portion 8132 and the passage portion 13012. Thereby facilitating an increase in the length of the air guide channel K52 and a decrease in the resonant frequency of the acoustic resonant structure 130.

Referring to fig. 18, fig. 18 is a schematic partial cross-sectional view of an electronic device 1 according to other embodiments of the application. This embodiment differs from the embodiment shown in fig. 1-17 in that: the resonance plate 1301 and the cover plate 12012 have two mutually independent structures. The resonance plate 1301 is stacked on a side surface of the cover plate 12012 facing away from the speaker 90. Illustratively, the resonator plate 1301 is adhesively attached to the cover plate 12012. The opening K53 in the resonator plate 1301 is directly opposite to the second opening 1204 in the cover plate 12012.

In this example, in order to facilitate smooth entry of the air flow into the air guide passage K52, the opening area of the opening K53 is larger than the cross-sectional area of the air guide passage K52. In other examples, the opening area of the opening K53 may be equal to the cross-sectional area of the air guide passage K52.

The present application is not limited thereto, and the opening area of the opening K53 may be smaller than the cross-sectional area of the air guide passage K52.

Referring to fig. 19, 20 and 21, fig. 19 is a perspective view of an electronic device 1 according to still other embodiments of the present application. Fig. 20 is a schematic sectional structure at line A5-A5 of the electronic device shown in fig. 19. Fig. 21 is an enlarged view of a circled portion at H according to the structure shown in fig. 20. This embodiment differs from the embodiment shown in fig. 1-18 in that: for a loudspeaker 90 with a vent passage in the driver 92 at the end of the driver 92 remote from the diaphragm 91, the housing structure 120 may not include the middle plate 22 and the enclosure 1202, but only the sound chamber plate 1201.

Specifically, with continued reference to fig. 21, a portion of the surface of the sound cavity plate 1201 facing the driving device 92 is recessed away from the driving device 92 to form a rear sound groove 1205. The driving device 92 blocks a portion of the opening of the rear sound tank 1205 and defines the rear sound chamber K41 together with the rear sound tank 1205. The remaining portion of the open mouth of the rear sound slot 1205 defines a first opening 1203.

Referring to fig. 22, 23 and 24, fig. 22 is a perspective view of an electronic device 1 according to some other embodiments of the present application. Fig. 23 is a schematic sectional structure at a line A6-A6 of the electronic device 1 shown in fig. 22, and fig. 24 is an enlarged view of a circled portion at J of the electronic device 1 shown in fig. 23. This embodiment is different from the embodiment shown in fig. 19 to 21 in that a positioning step 1208 is formed at the opening of the rear sound groove 1205. The end of the driving means 92 remote from the diaphragm 91 cooperates with the positioning step 1208. In this way, the positioning step 1208 is beneficial to positioning the fixation of the sound cavity plate 1201 and the speaker 90, and the assembly efficiency is improved.

With continued reference to fig. 24, a surface of the middle plate 22 facing the back cover is provided with a first rib 12021. The first rib 12021 is provided around the speaker 90 in the entire circumference of the speaker 90. In this way, on the one hand, the structural strength of the middle plate 22 can be enhanced, and on the other hand, the first blocking rib 12021 is also beneficial to playing a role in positioning the loudspeaker 90, so as to improve the assembly efficiency.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples in the description.

Claims

1. An electronic device, comprising: a housing, a speaker, a housing structure, and an acoustic resonance structure;

the loudspeaker and the shell structure are both fixed in the shell, the loudspeaker and the shell structure enclose a rear sound cavity, and the shell structure is provided with a first opening and a second opening which are spaced apart;

the shell is internally provided with a volume-expansion rear cavity which is communicated with the rear sound cavity through the first opening, so that the volume-expansion rear cavity and the rear sound cavity jointly define a rear cavity of the loudspeaker;

the sound resonance structure is fixed on the shell and is positioned outside the rear sound cavity, the sound resonance structure is provided with a resonance cavity, the resonance cavity is provided with an opening, and the opening is communicated with the second opening;

the shell comprises a back cover, the back cover is provided with a mounting opening, the acoustic resonance structure comprises a decorating part, the decorating part comprises a cylinder body and a cover body, the cylinder body is arranged in the mounting opening in a penetrating mode, the outer end of the inner peripheral surface of the cylinder body is connected with the periphery of the cover body in a circle, the decorating part is fixed on the back cover and is used for sealing the mounting opening, and a part of inner wall surface of the resonant cavity is located on the surface of the cover body, facing the inside of the electronic equipment.

2. The electronic device of claim 1, wherein the resonant cavity comprises a resonant cavity body and an air guide channel, the air guide channel is in communication with the resonant cavity body, the volume of the air guide channel is smaller than the volume of the resonant cavity body, the cross-sectional area of the air guide channel is smaller than the cross-sectional area of the resonant cavity body, and the opening is formed at the air guide channel.

3. The electronic device of claim 1 or 2, wherein the decorative piece has a camera hole;

the sound resonance structure further comprises a resonance plate, the resonance plate is located in the shell and fixed on the surface, facing the inside of the electronic equipment, of the decoration piece, and the resonance plate and the part, which is not provided with the camera hole, of the decoration piece enclose to form the resonance cavity.

4. The electronic device of claim 3, wherein the camera hole is formed in the cover portion;

the resonant plate comprises a main body part, the main body part is opposite to the cover body part, the resonant cavity comprises a resonant cavity body, and the resonant cavity body is formed between the main body part and the cover body part.

5. The electronic device according to claim 4, wherein a convex rib is provided on a surface of the cover portion facing the inside of the electronic device, both ends of the convex rib in a direction parallel to the cover portion are respectively connected to an inner peripheral surface of the cylindrical body portion, and the convex rib, a portion of the inner peripheral surface of the cylindrical body portion between both ends of the convex rib, and a portion of the surface of the cover portion facing the inside of the electronic device enclose a resonance open cavity open toward the inside of the electronic device;

The main body part is fixed in the protruding rib, and the closing cap resonance open cavity's uncovered is in order to with resonance open cavity jointly limit resonant cavity body.

6. The electronic device of claim 5, wherein a portion of a surface of the main body portion facing the resonant open cavity is recessed in a direction away from the resonant open cavity to define a resonant tank, the resonant tank and the resonant open cavity together defining the resonant cavity body.

7. The electronic apparatus according to claim 6, wherein the decorative piece includes an annular flange connected to an inner end of an outer peripheral surface of the cylindrical body, the annular flange being fixed to a portion of an inner surface of the back cover around the mounting opening;

the resonant cavity comprises an air guide channel;

the resonance plate comprises a channel part, the channel part is connected with the main body part, the channel part is fixedly laminated on the inner surface of the annular flanging, a part of the surface of the channel part facing the annular flanging is recessed towards a direction away from the annular flanging to define a channel groove, the annular flanging covers the opening of the channel groove to jointly define an air guide channel with the channel groove, the opening is formed in the channel part, and the air guide channel is communicated with the resonance cavity body through the channel groove and the resonance groove.

8. The electronic device of claim 3, wherein the trim piece comprises an annular flange secured to a portion of the inner surface of the back cover surrounding the mounting opening;

the resonant cavity comprises an air guide channel;

the resonance plate comprises a channel part, the channel part is fixedly stacked on the inner surface of the annular flanging, the channel part is matched with the annular flanging to define the air guide channel, and the opening is formed on the channel part.

9. The electronic device of claim 8, wherein a portion of a surface of the channel portion facing the annular flange is recessed in a direction away from the annular flange to define a channel slot, the annular flange closing an open mouth of the channel slot to define the air guide channel with the channel slot.

10. The electronic device of any one of claims 7-9, wherein the annular flange includes a flange body disposed about the mounting opening and a widened portion connected to a peripheral edge of the flange body, the widened portion protruding from the peripheral edge of the flange body in a direction away from the mounting opening, a portion of the air guide channel being formed between the flange body and the channel portion, and another portion of the air guide channel being formed between the widened portion and the channel portion.

11. The electronic device of claim 1 or 2, wherein the electronic device comprises a screen, a center, and a back cover,

the middle frame comprises a middle plate and a frame, the middle plate and the screen are arranged in a stacked mode, the back cover is located on one side, far away from the screen, of the middle plate and is arranged in a stacked mode with the middle plate, and the frame is arranged around the back cover, the middle plate and one circle of the screen;

the frame, the middle plate and the back cover enclose a first cavity, the loudspeaker is positioned in the first cavity and fixed on the middle plate, and the first cavity forms at least one part of the capacity-expansion rear cavity of the loudspeaker.

12. The electronic apparatus according to claim 11, wherein the middle plate is formed with a communication hole penetrating through the middle plate;

the loudspeaker comprises a vibrating diaphragm, the vibrating diaphragm seals the communication hole, the inner peripheral wall of the communication hole and the outer surface of the vibrating diaphragm can define a front cavity of the loudspeaker, and the front cavity and the rear sound cavity are positioned on two sides of the vibrating diaphragm;

the electronic equipment is provided with a sound outlet hole, and the sound outlet hole is communicated with the front cavity and the outside of the electronic equipment.

13. The electronic device according to claim 12, wherein the housing structure includes the middle plate, a sound cavity plate and a fence, the sound cavity plate is fixed in the first cavity, the sound cavity plate is located on a side of the speaker away from the middle plate and is stacked with the middle plate, the fence is connected between the middle plate and the sound cavity plate, and is disposed around the speaker in the entire circumference of the speaker, the fence, the middle plate and the sound cavity plate jointly enclose the rear sound cavity, and the first opening is formed in the fence and/or the sound cavity plate.

14. The electronic device of claim 13, wherein the enclosure includes a first blocking rib and a second blocking rib, the first blocking rib is fixed on a surface of the middle plate facing the back cover and is disposed around the speaker in an entire circumferential direction of the speaker, the second blocking rib is fixed on a surface of the sound cavity plate facing the middle plate, the second blocking rib is disposed on an outer periphery of the speaker in a circumferential direction of the speaker, one circumferential end of the second blocking rib has the first opening, and an end surface of the second blocking rib facing away from the sound cavity plate is in sealing connection with an end surface of the first blocking rib facing away from the middle plate.

15. The electronic device of claim 13, wherein a region of the surface of the sound cavity plate facing the speaker surrounded by the enclosure is recessed away from the midplane to form a rear sound slot.

16. The electronic device according to claim 1, wherein the speaker includes a diaphragm and a driving means, the driving means being located at one side of the diaphragm in a thickness direction of the diaphragm and connected to the diaphragm;

the shell structure comprises a sound cavity plate, the sound cavity plate is located on one side, far away from the vibrating diaphragm, of the driving device, a part of the surface, facing the driving device, of the sound cavity plate is recessed in the direction away from the driving device to form a rear sound groove, the driving device plugs a part of an opening of the rear sound groove and jointly defines the rear sound cavity with the rear sound groove, and the rest of the opening of the rear sound groove defines the first opening.

17. The electronic device of any of claims 13-16, wherein the electronic device comprises a screen, a bezel, and a back cover,

The frame, the middle plate and the back cover enclose a first cavity, the loudspeaker is positioned in the first cavity and fixed on the middle plate, the first cavity forms at least one part of a capacity-expansion rear cavity of the loudspeaker, the sound cavity plate is positioned in the first cavity, and the sound cavity plate is positioned on one side of the loudspeaker far away from the middle plate and is laminated with the middle plate;

the electronic equipment further comprises a circuit board and a circuit board support, wherein the circuit board and the circuit board support are both located in the first cavity, the circuit board is fixedly arranged on the middle board in a laminated mode and electrically connected with the loudspeaker, the circuit board support is respectively connected with the circuit board and the middle frame, and the circuit board support comprises the sound cavity board.

18. The electronic device of any one of claims 15-16, wherein the acoustic cavity plate comprises:

the body plate is provided with a through hole penetrating through the body plate along the thickness direction of the body plate;

the cover plate is arranged on one side, far away from the loudspeaker, of the body plate in a stacked mode, and the cover plate seals the through holes to limit the rear sound groove with the through holes.

19. The electronic device of claim 18, wherein the acoustic resonant structure comprises a resonator plate defining a portion of an inner wall surface of the resonant cavity, the resonator plate being the cover plate, the second opening being the aperture and being formed in the cover plate.

20. The electronic device of claim 1 or 2, wherein an opening area of the second opening is smaller than an opening area of the first opening.

21. The electronic device of claim 1 or 2, wherein a resonance frequency of the housing is the same as a resonance frequency of the acoustic resonant structure.