CN109151680B

CN109151680B - Electronic device

Info

Publication number: CN109151680B
Application number: CN201810852298.7A
Authority: CN
Inventors: 欧阳灵; 严笔祥; 唐春树
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2020-09-04
Anticipated expiration: 2038-07-27
Also published as: CN109151680A

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 device

Technical Field

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

Background

With the increasing development of electronic devices, users have higher requirements on the appearance of the electronic devices. For mobile phones, maximizing the screen ratio is one of the important considerations in the design of current products. In order to increase the screen occupation ratio, the industry is currently moving towards realizing the telephone receiving function of making a call by adopting a screen sounding technology or a micro-seam sounding mode. In the aspect of improving the tone quality of the mobile phone, the mobile phone usually adopts a stereo scheme at present, the function of a receiver is replaced by a mobile phone loudspeaker, and the sound output of the mobile phone loudspeaker is realized by a large sound output hole at the upper end of the mobile phone. However, pursuing the improvement of the appearance expressive force of the mobile phone needs to reduce or cancel the sound output area of the mobile phone at the upper end of the mobile phone as much as possible, but the sound quality experience brought by the pursuit of the improvement of the appearance expressive force of the mobile phone is very poor, and the sound quality experience of the user can be sacrificed.

Disclosure of Invention

The application provides an electronic equipment with two vibrating diaphragm speaker monomer can solve above-mentioned technical problem.

The application provides an electronic equipment, including casing and speaker subassembly, the casing has the front and goes out the sound hole and the back goes out the sound hole, speaker subassembly sets up in the casing, speaker subassembly speaker monomer and a power amplifier, speaker monomer includes first vibrating diaphragm, second vibrating diaphragm, magnetic circuit assembly, first coil and second coil, magnetic circuit assembly is located first vibrating diaphragm with between the second vibrating diaphragm, magnetic circuit assembly forms the orientation first clearance and the orientation of first vibrating diaphragm the second clearance of second vibrating diaphragm, first coil sets up in the first clearance and one end is fixed on the first vibrating diaphragm, the second coil sets up in the second clearance and one end is fixed on the second vibrating diaphragm, first coil with the second coil all with the power amplifier is connected, the power amplifier promotes first vibrating diaphragm with the produced sound of second vibrating diaphragm same phase vibration passes through respectively the power amplifier promotes the first vibrating diaphragm with the produced sound of second vibrating diaphragm same phase vibration passes through And the front sound outlet hole and the back sound outlet hole are used for outputting.

In this application, electronic equipment includes speaker subassembly and casing, speaker subassembly sets up in the casing, speaker subassembly includes a speaker monomer and a power amplifier, the speaker monomer includes first vibrating diaphragm, second vibrating diaphragm, first coil and second coil, first coil with the second coil respectively with first vibrating diaphragm with second vibrating diaphragm fixed connection, the power amplifier with first coil and second coil electric connection are in order to promote first vibrating diaphragm with the vibration of second vibrating diaphragm same phase, and, produced sound passes through respectively openly go out the sound hole with the sound hole output is gone out at the back, can promote the loudness greatly.

Drawings

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

Fig. 1 is a schematic structural diagram of an electronic device 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 connection diagram of a speaker unit and a power amplifier in an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and "third," etc. in the description and claims of this application and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. The term "comprises" and any variations thereof is intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Referring to fig. 1, fig. 1 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 e-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 disposed within 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 less components than those shown in fig. 1, or may combine some components, or different components, for example, the electronic device 100 may further include an input/output device, a network access device, a data bus, and the like.

The housing 20 has a front sound emitting hole 21 and a back sound emitting hole 22 disposed opposite to each other. 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 emission hole 21 is provided at a position of the front screen 23 adjacent to the top end 25, and the back sound emission hole 22 is provided at a position of the back battery cover 24 adjacent to the top end 25.

The speaker assembly 10 includes a speaker unit 1. Referring to fig. 2, fig. 2 is a schematic structural diagram of a speaker unit according to 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 towards the first diaphragm 11 and a second gap 133 towards the second diaphragm 12. The first coil 14 is disposed in the first gap 131 and fixed at one end to the first diaphragm 11, and the second coil 15 is disposed in the second gap and fixed at one end to the second diaphragm 12.

Please refer to fig. 3, fig. 3 is a schematic diagram illustrating a connection between a speaker unit and a power amplifier according to an embodiment of the present application. The loudspeaker assembly 10 further comprises a power amplifier 2. The first coil 14 and the second coil 15 are both connected with the power amplifier 2. The power amplifier 2 pushes the first coil 14 and the second coil 15 to vibrate simultaneously to generate sound, and the generated sound is output through the front sound outlet hole 21 and the back sound outlet hole 22 respectively.

In this application, electronic device 100 includes speaker subassembly 10 and casing 20, speaker subassembly 10 sets up in casing 20, speaker subassembly 10 includes a speaker monomer 1 and a power amplifier 2, speaker monomer 1 includes first vibrating diaphragm 11, second vibrating diaphragm 12, first coil 14 and second coil 15, first coil 14 with second coil 15 is fixed respectively first vibrating diaphragm 11 with on the second vibrating diaphragm 12, first coil 14 with second coil 15 all with power amplifier 2 is connected, power amplifier 2 promotes first vibrating diaphragm 11 with the produced sound of second vibrating diaphragm 12 same phase vibration passes through respectively openly go out sound hole 21 with back goes out sound hole 22 output, can promote the loudness greatly. Compared with a single diaphragm loudspeaker monomer, the double-diaphragm loudspeaker monomer 1 has a larger space in the aspect of increasing loudness.

In particular, the first coil 14 may be fixed to the first diaphragm 11 by gluing or other suitable means, and the second coil 15 may be fixed to the second diaphragm 12 by gluing or other suitable means.

Specifically, the magnetic circuit assembly 13 includes a magnetically permeable disk 135, a first magnet 137, and at least one second magnet 139. The magnetic conductive disc 135 is located between the first diaphragm 11 and the second diaphragm 12. The magnetic conductive disk 135 includes a ring portion 1351 having a U-shaped cross section and a ring flange portion 1353 extending perpendicularly outward from an open end of the ring portion 1351. The annular portion 1351 has a first receiving portion 1355 formed therein. The first receiving portion 1355 faces the first diaphragm 11. A second receiving portion 1357 is formed between the flange portion 1353 and an 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 provided on the bottom wall in the first housing portion 1355. A first magnetic field (not shown) is formed between the first magnet 137 and the inner wall of the ring portion 1351. When the first coil 14 is disposed within the first gap 131, the first coil 14 is within the first magnetic field. After the alternating current is supplied to the first coil 14, the first coil 14 vibrates in the first magnetic field along the vertical direction under the action of the ampere force of the first magnetic field, and then drives the first diaphragm 11 to vibrate.

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 and the outer wall of the annular portion 1351 and the flange portion 1353. When the second coil 15 is disposed within the second gap 133, the second coil 15 is in the second magnetic field. After the second coil 15 is internally provided with alternating current, the second coil 15 is vibrated along the vertical direction in the second magnetic field under the action of the ampere force of the second magnetic field, so as to drive the second diaphragm 12 to vibrate.

The first diaphragm 11 and the second diaphragm 12 can thus vibrate simultaneously, so that the loudness can be increased.

More specifically, in one embodiment, the at least one second magnet 139 includes one second magnet 139, and the second magnet 139 is annular. The second magnet 139 surrounds the outer wall of the ring 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 in the shape of a circular arc. The at least two second magnets 139 are spaced around the outer wall of the ring portion 1351 to form the second gap 133. The at least two second magnets 139 are located on the same circumferential line around the center of the ring portion 1351.

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

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

Further, the holder 16 is provided with a ring-shaped sound outlet hole 161 around its peripheral wall. The sound outlet hole 161 is located opposite to the substantially middle portion of the second magnet 139. The sound outlet hole 161 is used for outputting sound generated by the first diaphragm 11 and the second diaphragm 12.

Specifically, the upper surface of the flange portion 1353 of the magnetic conductive disk 135 is substantially flush with the top of the first magnet 137, the bottom of the ring portion 1351 of the magnetic conductive disk 135 is substantially flush with the bottom of the second magnet 139, and the top end of the bracket 16 is higher than the upper surface of the flange portion 1353 of the magnetic conductive disk 135 and the top of the first magnet 137, so that a gap exists between the upper surfaces of the first diaphragm 11 and the flange portion 1353 of the magnetic conductive disk 135 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 ring portion 1351 of the magnetic conductive disk 135 and the bottom of the second magnet 139, so that a gap exists between the second diaphragm 12 and the bottom of the ring portion 1351 of the magnetic conductive disk 135 and the bottom of the second magnet 139, and the gap forms a sound path B. A gap also exists between the outer wall of the second magnet 139 and the inner wall of the holder 16, which gap forms the sound path C. The three sound output paths A, B are connected to each other and are finally connected to the sound output holes 161, so that the sound generated by the vibration of the first diaphragm 11 and the second diaphragm 12 is output through the sound output paths A, B and C and the sound output holes 161.

Further, a sound guiding 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, the sound guiding tube G1 communicates the front sound outlet hole 21 and the sound outlet hole 161, and the sound guiding tube G1 further communicates the back sound outlet hole 22 and the sound outlet hole 161 for guiding out sound.

Specifically, please refer to fig. 3, in which fig. 3 is a schematic diagram illustrating a connection between a speaker unit and a power amplifier according to an embodiment of the present application. In an 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, and then the positive and negative electrodes are connected to the positive and negative electrodes of the power amplifier 2, respectively, to form the same-phase vibration, so that the loudness can be greatly increased.

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

The front sound emitting hole 21 and the back sound emitting hole 22 are configured to output low frequency sound, and have a maximum value in a direction parallel to the surface of the front screen 23 and a minimum value in a direction perpendicular to the surface of the front screen 23. Therefore, when the speaker assembly 10 is used to realize a telephone receiver function of a call and extend low-frequency sound, the front sound outlet hole 21 and the back sound outlet hole 22 are equivalent to the same-phase radiation sound source, have a certain radiation directivity, and have a maximum value in a direction parallel to the surface of the front screen 23 and a minimum value in a direction perpendicular to the surface of the front screen 23, so that when a person uses his/her ear to answer a call, the privacy of the call can be ensured to a certain extent.

Further, when the speaker assembly 10 plays music, the sound outputted from the front sound hole 21 and the back sound hole 22 are coupled to each other, and the total sound output volume of the front sound hole 21 and the back sound hole 22 is four times that of a single sound output hole, so that the sound output volume is greatly increased.

The utility model provides an electronic equipment, including speaker subassembly and casing, speaker subassembly sets up in the casing, speaker subassembly includes a speaker monomer and a power amplifier, the speaker monomer includes first vibrating diaphragm, second vibrating diaphragm, first coil and second coil, first coil with the second coil respectively with first vibrating diaphragm with second vibrating diaphragm fixed connection, the power amplifier with first coil and second coil electric connection are in order to promote first vibrating diaphragm with the vibration of second vibrating diaphragm same phase, and, produced sound passes through respectively openly go out the sound hole with the sound hole output is gone out at the back, can promote the loudness greatly. Compared with stereo or double-loudspeaker schemes, the space requirement and one power amplifier cost are saved.

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

The foregoing is an implementation of the embodiments of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the embodiments of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. An electronic device, comprising a housing and a speaker assembly, wherein the housing has a front sound outlet and a back sound outlet, the speaker assembly is disposed in the housing, the speaker assembly comprises a speaker unit and a power amplifier, the speaker unit comprises a first diaphragm, a second diaphragm, a magnetic circuit assembly, a first coil and a second coil, the magnetic circuit assembly is disposed 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, the first coil is disposed in the first gap and has one end fixed on the first diaphragm, the second coil is disposed in the second gap and has one end fixed on the second diaphragm, and the first coil and the second coil are both connected to the power amplifier, the power amplifier pushes the sound generated by the same-phase vibration of the first vibrating diaphragm and the second vibrating diaphragm to be output through the front sound outlet hole and the back sound outlet hole respectively;

the front sound outlet hole and the back sound outlet hole are micro-slit belts, each micro-slit belt comprises at least two micro-slits arranged at intervals, a metal strip is arranged between every two adjacent micro-slits, the width of each micro-slit is 0.05mm, 0.3mm or a value between 0.05mm and 0.3mm, when the front sound outlet hole and the back sound outlet hole are used for outputting low-frequency sound, the maximum value appears in a direction parallel to the surface of the front screen, and the minimum value appears in a direction perpendicular to the surface of the front screen.

2. The electronic device of claim 1, wherein the magnetic circuit assembly includes a magnetic conductive disc, a first magnet, and at least one second magnet, the magnetic conductive disc is located between the first diaphragm and the second diaphragm, the magnetic conductive disc includes an annular portion having a U-shaped cross section and a flange portion extending perpendicularly outward from an open end of the annular portion, a first receiving portion is formed inside the annular portion, the first receiving portion faces the first diaphragm, a second receiving portion is formed between the flange portion and an outer wall of the annular portion, the second receiving portion faces the second diaphragm, the first magnet is received in the first receiving portion to form the first gap, and the at least one second magnet is received in the second receiving portion to form the second gap.

3. The electronic device of claim 2, wherein the at least one second magnet comprises one second magnet having a ring shape surrounding an outer wall of the ring portion to form the second gap.

4. The electronic device according to claim 2, wherein the at least one second magnet includes two second magnets, the two second magnets are in an annular arc shape, the two second magnets surround an outer wall of the annular portion at an interval to form the second gap, and the two second magnets are on a same circumferential line centered on a center of the annular portion.

5. The electronic apparatus according to claim 4, wherein the two second magnets are symmetrically arranged on the same circumferential line centered on a center of the annular portion.

6. The electronic device of claim 1, wherein the diaphragm further comprises a support disposed around the magnetic circuit assembly, the first coil, and the second coil, and wherein the first diaphragm lap is disposed on a top end of the support and the second diaphragm lap is disposed on a bottom end of the support.

7. The electronic device of claim 6, wherein the bracket is provided with annular sound outlet holes around a peripheral wall thereof, a sound guide tube is formed between an outer wall of the bracket and an inner wall of the top end of the housing, the sound guide tube communicates the front sound outlet holes and the sound outlet holes, and the sound guide tube further communicates the back sound outlet holes and the sound outlet holes.

8. The electronic device of claim 1, wherein an anode of the first coil is connected to an anode of the second coil, and a cathode of the first coil is connected to a cathode of the second coil and then respectively connected to an anode and a cathode of the power amplifier.

9. The electronic device according to claim 1, wherein the housing includes a front screen, a back battery cover, and a top end connecting the front screen and the back battery cover, wherein the front sound hole is provided at a position of the front screen adjacent to the top end, and the back sound hole is provided at a position of the back battery cover adjacent to the top end.