CN109151680B - Electronic device - Google Patents

Abstract

The application provides an electronic device, which comprises a shell and a loudspeaker component, wherein the shell is provided with a front sound outlet hole and a back sound outlet hole which are oppositely arranged, the loudspeaker component is arranged in the shell and comprises a loudspeaker monomer and a power amplifier, the loudspeaker monomer comprises a first vibrating diaphragm and a second vibrating diaphragm, magnetic circuit component, first coil and second coil, magnetic circuit component is located between first vibrating diaphragm and the second vibrating diaphragm, magnetic circuit component forms the first clearance towards first vibrating diaphragm and the second clearance towards the second vibrating diaphragm, first coil sets up in first clearance and one end is fixed on first vibrating diaphragm, the second coil sets up in the second clearance and one end is fixed on the second vibrating diaphragm, first coil and second coil all are connected with the power amplifier, the power amplifier promotes the produced sound of first vibrating diaphragm and second vibrating diaphragm same phase vibration and goes out the sound hole output through openly going out the sound hole and the back respectively. This application is through first vibrating diaphragm and the vibration of second vibrating diaphragm homophase, and it improves greatly to go out sound intensity.

Description

Electronic equipment

technical field

The present application relates to an electronic device with a dual-diaphragm speaker unit.

Background technique

With the increasing development of electronic devices, users have higher and higher requirements on the appearance of electronic devices. For mobile phones, maximizing the screen-to-body ratio is one of the important considerations in current product design. In order to increase the screen-to-body ratio, the industry is now beginning to use screen sound technology or micro-slit sound to achieve the function of receiving calls. In terms of improving the sound quality of mobile phones, at present, mobile phones often use stereo solutions, using mobile phone speakers to replace the earpiece function. However, in pursuit of improving the appearance and expressiveness of mobile phones, it is necessary to minimize or cancel the sound output area of the mobile phone on the upper end of the mobile phone, but the sound quality experience is very poor, which will sacrifice the user's sound quality experience.

SUMMARY OF THE INVENTION

The present application provides an electronic device with a dual-diaphragm speaker unit, which can solve the above technical problems.

The present application provides an electronic device, including a casing and a speaker assembly, the casing has a front sound outlet and a rear sound outlet, the speaker assembly is arranged in the casing, and the speaker assembly is a speaker unit and a speaker unit. A power amplifier, the speaker unit includes a first diaphragm, a second diaphragm, a magnetic circuit assembly, a first coil and a second coil, and the magnetic circuit assembly is located on the first diaphragm and the second diaphragm The magnetic circuit assembly forms a first gap facing the first diaphragm and a second gap facing the second diaphragm, the first coil is arranged in the first gap and one end is fixed on the On the first diaphragm, the second coil is arranged in the second gap and one end is fixed on the second diaphragm, and both the first coil and the second coil are connected to the power amplifier , the sound generated by the power amplifier pushing the first vibrating membrane and the second vibrating membrane to vibrate in the same phase is respectively output through the front sound outlet and the back sound outlet.

In this application, the electronic device includes a speaker assembly and a casing, the speaker assembly is disposed in the casing, the speaker assembly includes a speaker unit and a power amplifier, and the speaker unit includes a first diaphragm , a second diaphragm, a first coil and a second coil, the first coil and the second coil are fixedly connected to the first diaphragm and the second diaphragm respectively, and the power amplifier is connected to the first diaphragm and the second diaphragm respectively. A coil and a second coil are electrically connected to push the first diaphragm and the second diaphragm to vibrate in the same phase, and the generated sound is output through the front sound hole and the back sound hole respectively , which can greatly increase the loudness.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the implementation manner. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an electronic device in an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a speaker unit in an embodiment of the present application.

FIG. 3 is a schematic diagram of a connection between a speaker unit and a power amplifier in an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only Examples of some, but not all, examples of this application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

The terms "first", "second" and "third" in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. The term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Please refer to FIG. 1 , which is a schematic structural diagram of an electronic device in an embodiment of the present application. The electronic device 100 may be, but is not limited to, a mobile phone, a tablet computer, an electronic reader, a wearable electronic device, and the like. The electronic device 100 includes a speaker assembly 10 and a housing 20 . The speaker assembly 10 is arranged in the housing 20 . It should be understood by those skilled in the art that FIG. 1 is only an example of the electronic device 100 and does not constitute a limitation to the electronic device 100 , and the electronic device 100 may include more or more components than those shown in FIG. 1 . Fewer components, or a combination of some components, or different components, for example, the electronic device 100 may also include input and output devices, network access devices, data buses, and the like.

The housing 20 has a front sound outlet hole 21 and a rear sound outlet hole 22 arranged oppositely. Specifically, the housing 20 includes a front screen 23 , a rear battery cover 24 , and a top end 25 connecting the front screen 23 and the rear battery cover 24 . The front sound outlet 21 is disposed at a position adjacent to the top end 25 of the front screen 23 , and the rear sound outlet 22 is disposed at a position adjacent to the top end 25 of the rear battery cover 24 .

The speaker assembly 10 includes a speaker unit 1 . Please refer to FIG. 2 together. FIG. 2 is a schematic structural diagram of a speaker unit in an embodiment of the present application. The speaker unit 1 includes a first diaphragm 11 , a second diaphragm 12 , a magnetic circuit assembly 13 , a first coil 14 and a second coil 15 . The magnetic circuit assembly 13 is located between the first diaphragm 11 and the second diaphragm 12 . The magnetic circuit assembly 13 forms a first gap 131 facing the first diaphragm 11 and a second gap 133 facing the second diaphragm 12 . The first coil 14 is arranged in the first gap 131 and one end is fixed on the first diaphragm 11 , and the second coil 15 is arranged in the second gap and has one end fixed on the second diaphragm 11 . on the diaphragm 12.

Please refer to FIG. 3 together. FIG. 3 is a schematic diagram of a connection between a speaker unit and a power amplifier in an embodiment of the present application. The speaker assembly 10 further includes a power amplifier 2 . Both the first coil 14 and the second coil 15 are connected to the power amplifier 2 . The sound generated by the power amplifier 2 pushing the first coil 14 and the second coil 15 to vibrate at the same time is output through the front sound outlet 21 and the back sound outlet 22 respectively.

In this application, the electronic device 100 includes a speaker assembly 10 and a casing 20, the speaker assembly 10 is disposed in the casing 20, the speaker assembly 10 includes a speaker unit 1 and a power amplifier 2, the The speaker unit 1 includes a first diaphragm 11 , a second diaphragm 12 , a first coil 14 and a second coil 15 , and the first coil 14 and the second coil 15 are respectively fixed on the first diaphragm 11 and on the second diaphragm 12, the first coil 14 and the second coil 15 are both connected to the power amplifier 2, and the power amplifier 2 pushes the first diaphragm 11 and the second diaphragm 12 The sound generated by the same phase vibration is output through the front sound outlet 21 and the back sound outlet 22 respectively, which can greatly improve the loudness. Compared with the single-diaphragm loudspeaker unit, the dual-diaphragm loudspeaker unit 1 of the present application has more space for increasing the loudness.

Specifically, the first coil 14 can be fixed on the first diaphragm 11 by gluing or other suitable methods, and the second coil 15 can be fixed on the second diaphragm 11 by gluing or other suitable methods. on the diaphragm 12.

Specifically, the magnetic circuit assembly 13 includes a guide disk 135 , a first magnet 137 and at least one second magnet 139 . The guide disk 135 is located between the first diaphragm 11 and the second diaphragm 12 . The guide disc 135 includes an annular portion 1351 with a U-shaped cross section and an annular flange portion 1353 vertically extending outward from the opening end of the annular portion 1351 . A first receiving portion 1355 is formed inside the annular portion 1351 . The first receiving portion 1355 faces the first diaphragm 11 . A second receiving portion 1357 is formed between the flange portion 1353 and the outer wall of the annular portion 1351 . The second receiving portion 1357 faces the second diaphragm 12 . The first magnet 137 is accommodated in the first accommodating portion 1355 to form the annular first gap 131 . The at least one second magnet 139 is accommodated in the second accommodating portion 1357 to form the annular second gap 133 .

Specifically, the first magnet 137 is disposed on the bottom wall of the first receiving portion 1355 . A first magnetic field (not shown) is formed between the first magnet 137 and the inner wall of the annular portion 1351 . When the first coil 14 is disposed in the first gap 131, the first coil 14 is in the first magnetic field. When an alternating current is passed through the first coil 14 , the first coil 14 vibrates in the up-down direction in the first magnetic field under the action of the ampere force of the first magnetic field, thereby driving the first coil 14 The diaphragm 11 vibrates.

Specifically, the at least one second magnet 139 is disposed on a side of the flange portion 1353 close to the second diaphragm 12 . A second magnetic field is formed between the at least one second magnet 139 , the outer wall of the annular portion 1351 and the flange portion 1353 . When the second coil 15 is disposed in the second gap 133, the second coil 15 is in the second magnetic field. After the alternating current is passed through the second coil 15, the second coil 15 vibrates in the up-down direction in the second magnetic field under the action of the ampere force of the second magnetic field, thereby driving the second vibration. The membrane 12 vibrates.

Therefore, the first diaphragm 11 and the second diaphragm 12 can vibrate at the same time, so that the loudness can be increased.

More specifically, in one embodiment, the at least one second magnet 139 includes one of the second magnets 139 , and the second magnet 139 is annular. The second magnet 139 surrounds the outer wall of the annular portion 1351 to form the second gap 133 .

Further, in another embodiment, the at least one second magnet 139 includes at least two second magnets 139 . The at least two second magnets 139 are annular arcs. The at least two second magnets 139 surround the outer wall of the annular portion 1351 at intervals to form the second gap 133 . In addition, the at least two second magnets 139 are on the same circumferential line with the center of the annular portion 1351 as the center.

More specifically, in one embodiment, the at least two second magnets 139 are symmetrically arranged on the same circumferential line centered on the center of the annular portion 1351 .

Further, the speaker unit 1 further includes a bracket 16 . The bracket 16 is annular, the bracket 16 is arranged around the magnetic circuit assembly 13 , the first coil 14 and the second coil 15 , and the first diaphragm 11 is overlapped and arranged at the place. On the top end of the bracket 16 , the second diaphragm 12 is overlapped and disposed on the bottom end of the bracket 16 .

Further, the bracket 16 is provided with an annular sound outlet hole 161 around its peripheral wall. The sound outlet hole 161 is directly opposite to the substantially middle of the second magnet 139 . The sound outlet hole 161 is used for outputting the sound generated by the first diaphragm 11 and the second diaphragm 12 .

Specifically, the upper surface of the flange portion 1353 of the guide disk 135 is substantially flush with the top of the first magnet 137 , and the bottom of the annular portion 1351 of the guide disk 135 is substantially flush with the bottom of the second magnet 139 . Roughly flush, the top of the bracket 16 is higher than the upper surface of the flange portion 1353 of the guide disk 135 and the top of the first magnet 137 . Therefore, the first diaphragm 11 and the guide disk 135 There is a gap between the upper surface of the flange portion 1353 and the top of the first magnet 137, and the gap forms the sound path A. The bottom end of the bracket 16 is lower than the bottom of the annular portion 1351 of the guide disk 135 and the bottom of the second magnet 139 . Therefore, the second diaphragm 12 and the annular portion of the guide disk 135 There is a gap between the bottom of the second magnet 1351 and the bottom of the second magnet 139, and the gap forms the sound path B. There is also a gap between the outer wall of the second magnet 139 and the inner wall of the bracket 16 , and the gap forms a sound path C. The above three sound output paths A, B and C communicate with each other, and are finally communicated with the sound output hole 161. Therefore, the sound generated by the vibration of the first diaphragm 11 and the second diaphragm 12 passes through the above The sound output paths A, B and C and the above-mentioned sound output holes 161 emit sound.

Further, a sound guide tube G1 is formed between the outer wall of the bracket 16 and the inner wall of the top end 25 of the housing 20 , and the sound guide tube G1 communicates with the front sound outlet 21 and the sound outlet hole 161, the sound guide tube G1 is also connected to the rear sound outlet hole 22 and the sound outlet hole 161 for exporting sound.

Specifically, please refer to FIG. 3 together. FIG. 3 is a schematic diagram of a connection between a speaker unit and a power amplifier in an embodiment of the present application. In one embodiment, the positive electrode A1 of the first coil 14 is connected to the positive electrode A2 of the second coil 15 , and the negative electrode C1 of the first coil 14 is connected to the negative electrode C2 of the second coil 15 . , which are respectively connected with the positive and negative poles of the power amplifier 2 to form the same phase vibration, which can greatly increase the loudness.

Specifically, in one embodiment, the front sound outlet hole 21 and the back sound outlet hole 22 are respectively micro-slit strips, and the micro-slit strip includes at least two micro-slits arranged at intervals, and the adjacent two There are metal strips between the micro slits. Wherein, the extending direction of the metal strip is parallel to the extending direction of the first slot strip. Wherein, the width of the slit band is 1.5mm, 5.0mm or 1.5mm˜5.0mm. The width of the micro slit is 0.05mm, 0.3mm or 0.05mm˜0.3mm. The width of the metal strip is 0.1 mm, 0.5 mm or a value in the range 0.1 mm to 0.5 mm.

When the front sound hole 21 and the back sound hole 22 are used to output low-frequency sound, a maximum value appears in the direction parallel to the surface of the front screen 23, and a maximum value appears in the direction perpendicular to the surface of the front screen 23. There is a minimum value in the direction of . Therefore, when the speaker assembly 10 is used to realize the receiver function of a call and emit low-frequency sound, the front sound outlet 21 and the back sound outlet 22 are equivalent to the same-phase radiation sound source, and have a certain radiation directivity , the maximum value appears in the direction parallel to the surface of the front screen 23, and the minimum value appears in the direction perpendicular to the surface of the front screen 23, so that when the human ear answers the phone, it can be To a certain extent, the privacy of the call is guaranteed.

Further, when the speaker assembly 10 is playing music, the sound output by the front sound hole 21 and the back sound hole 22 are coupled to each other, and the front sound hole 21 and the back sound hole 22 are coupled with each other. The total sound output is four times that of a single sound hole, thus greatly improving the sound output.

The electronic device of the present application includes a speaker assembly and a casing, the speaker assembly is arranged in the casing, the speaker assembly includes a speaker unit and a power amplifier, the speaker unit includes a first diaphragm, a second Two diaphragms, a first coil and a second coil, the first coil and the second coil are fixedly connected to the first diaphragm and the second diaphragm respectively, and the power amplifier is connected to the first coil It is electrically connected with the second coil to push the first diaphragm and the second diaphragm to vibrate in the same phase, and the generated sound is output through the front sound hole and the back sound hole respectively, which can Greatly increases the loudness. Compared to stereo or dual speaker solutions, it saves space requirements and the cost of an amplifier.

In addition, the front sound hole 21 and the back sound hole 22 are equivalent to the same-phase radiation sound source, have a certain radiation directivity, and a maximum value appears in the direction parallel to the surface of the front screen 23 , a minimum value appears in the direction perpendicular to the surface of the front screen 23 , so that when the human ear answers the phone, the privacy of the call can be guaranteed to a certain extent.

The above is the implementation of the embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the embodiments of the present application, several improvements and modifications can also be made. These improvements and modifications are also It is regarded as the protection scope of this application.

Claims (9)

1. An electronic device, characterized in that the electronic device comprises a housing and a speaker assembly, the housing has a front sound outlet and a back sound outlet that are arranged oppositely, and the speaker assembly is arranged in the housing , the speaker assembly includes a speaker unit and a power amplifier, the speaker unit includes a first diaphragm, a second diaphragm, a magnetic circuit assembly, a first coil and a second coil, and the magnetic circuit assembly is located in the Between the first diaphragm and the second diaphragm, the magnetic circuit assembly forms a first gap facing the first diaphragm and a second gap facing the second diaphragm, and the first coil is provided with in the first gap and one end is fixed on the first diaphragm, the second coil is arranged in the second gap and one end is fixed on the second diaphragm, the first coil and The second coils are all connected to the power amplifier, and the sound generated by the power amplifier pushing the first diaphragm and the second diaphragm to vibrate in the same phase passes through the front sound hole and the back sound respectively. hole output; Wherein, the front sound hole and the back sound hole are micro-slit strips, the micro-slit strip includes at least two micro-slits arranged at intervals, and there is a metal strip between two adjacent micro-slots, wherein the The width of the micro-slit is 0.05mm, 0.3mm or a value between 0.05mm and 0.3mm. When the front sound hole and the back sound hole are used to output low-frequency sound, when the sound hole is parallel to the front screen. Maximum values appear in the direction of the surface, and minimum values appear in the direction perpendicular to the surface of the front screen. 2 . The electronic device according to claim 1 , wherein the magnetic circuit assembly comprises a conductive disk, a first magnet and at least one second magnet, and the conductive disk is located between the first diaphragm and the first diaphragm. 3 . Between the two diaphragms, the guide disc includes an annular portion with a U-shaped cross-section and a flange portion vertically extending from the open end of the annular portion to the outside, and the inside of the annular portion forms a first an accommodating portion, the first accommodating portion faces the first diaphragm, a second accommodating portion is formed between the flange portion and the outer wall of the annular portion, and the second accommodating portion faces the second vibrating film In the film, the first magnet is accommodated in the first accommodating portion to form the first gap, and the at least one second magnet is accommodated in the second accommodating portion to form the second gap. 3 . The electronic device according to claim 2 , wherein the at least one second magnet comprises one of the second magnets, and the second magnet is annular and surrounds the outer wall of the annular portion. 4 . to form the second gap. 4 . The electronic device according to claim 2 , wherein the at least one second magnet comprises two second magnets, the two second magnets are in the shape of annular arcs, and the two second magnets The outer wall of the annular portion is spaced apart to form the second gap, and the two second magnets are on the same circumferential line centered on the center of the annular portion. 5 . The electronic device according to claim 4 , wherein the two second magnets are arranged symmetrically on the same circumferential line centered on the center of the annular portion. 6 . 6 . The electronic device according to claim 1 , wherein the diaphragm further comprises a bracket, the bracket is arranged around the magnetic circuit assembly, the first coil and the second coil, and the The first diaphragm is overlapped and arranged on the top end of the bracket, and the second diaphragm is overlapped and arranged on the bottom end of the bracket. 7 . The electronic device according to claim 6 , wherein an annular sound outlet hole is provided around the peripheral wall of the bracket, and an outer wall of the bracket and the inner wall of the top end of the housing are formed between the outer wall of the bracket and the inner wall of the top end of the housing. 8 . A sound guide pipe, the sound guide pipe is connected with the front sound outlet hole and the sound outlet hole, and the sound guide pipe is also connected with the back sound outlet hole and the sound outlet hole. 8 . The electronic device according to claim 1 , wherein the positive electrode of the first coil is connected to the positive electrode of the second coil, and the negative electrode of the first coil is connected to the negative electrode of the second coil. 9 . After connecting, connect to the positive and negative poles of the power amplifier respectively. 9 . The electronic device according to claim 1 , wherein the casing comprises a front screen, a back battery cover, and a top connecting the front screen and the back battery cover, and the front sound outlet is provided at the The front screen is located at a position adjacent to the top end, and the back sound outlet is provided at a position adjacent to the top end of the back battery cover.

Images