Loudspeaker and electronic equipment

Abstract

The embodiment of the invention provides a loudspeaker and electronic equipment. The loudspeaker comprises a central magnet, side magnets, a voice coil, a diaphragm and an adjusting part, the side magnets are arranged on the periphery of the center magnet in a surrounding mode, a gap exists between the side magnets and the center magnet, the diaphragm and the center magnet are oppositely arranged, the voice coil is connected with the diaphragm, and the voice coil extends into the gap. The loudspeaker has a hearing aid compatible mode and a conventional working mode, in the hearing aid compatible mode, the diaphragm is fixed on the central magnet by the adjusting piece, and the voice coil is used for sending an electromagnetic signal to the hearing aid; and in the conventional working mode, the diaphragm is separated from the central magnet. Through the setting, in the hearing aid compatible mode, no sound leakage of the loudspeaker in the call process is ensured, and user privacy leakage caused by sound leakage is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loudspeakers, in particular to a loudspeaker and an electronic device. BACKGROUND

[0002] In order to improve user experience, more and more loudspeakers of electronic devices such as mobile phones can realize hearing aid compatibility (HAC).

[0003] Electronic devices on the market usually add an extra voice coil in the regular earpiece to increase electromagnetic signals, or add a power amplifier and a T-coil to emit electromagnetic signals to hearing aids, but due to the complexity of the electronic device stack and the lack of space, the extra voice coil and other devices will affect the stack layout inside the electronic device, occupy the space of the circuit board, and increase the production cost of the electronic device.

[0004] At the same time, the current double-speaker stereo design has become mainstream, and some other electronic devices on the market use the top speaker as an earpiece, and use the voice coil of the speaker to emit electromagnetic signals to the hearing aid to realize the HAC function. However, in the HAC mode, the speaker leaks sound seriously, which greatly affects the user's privacy call. SUMMARY

[0005] In view of this, the present application provides a loudspeaker and an electronic device, which can realize the HAC function without changing the stack layout, and improve the privacy of the user when using the HAC function to call.

[0006] Specifically, the technical scheme includes the following:

[0007] In a first aspect, the present application provides a loudspeaker, which comprises a center magnet, an edge magnet, a voice coil, a diaphragm and an adjusting piece.

[0008] The edge magnet surrounds the outer periphery of the center magnet, and there is a gap between the edge magnet and the center magnet. The diaphragm is arranged opposite to the center magnet, and the voice coil is connected to the diaphragm and extends into the gap.

[0009] The loudspeaker has a hearing aid compatible mode and a regular working mode. In the hearing aid compatible mode, the adjusting piece fixes the diaphragm on the center magnet, and the voice coil is used to send electromagnetic signals to a hearing aid. In the regular working mode, the diaphragm is separated from the center magnet.

[0010] In an alternative embodiment, the loudspeaker further comprises a power amplifier electrically connected with the voice coil, the power amplifier being configured to drive the voice coil to move along the arrangement direction of the diaphragm and the center magnet in the normal operation mode, so that the diaphragm is driven to vibrate by the voice coil.

[0011] In an alternative embodiment, the power amplifier is further configured to receive a first control signal and a second control signal.

[0012] After receiving the first control signal, the power amplifier drives the voice coil to move towards the side close to the center magnet, so that the adjusting member fixes the diaphragm on the center magnet, thereby making the loudspeaker operate in the hearing aid compatible mode.

[0013] After receiving the second control signal, the power amplifier drives the voice coil to move away from the center magnet, so that the diaphragm is separated from the center magnet, thereby making the loudspeaker operate in the normal operation mode.

[0014] In an alternative embodiment, the adjusting member is a double-sided adhesive tape, an electrostatic tape or a magic tape, and the adjusting member is arranged between the diaphragm and the center magnet.

[0015] In an alternative embodiment, the adjusting member is a magnetic member, the adjusting member is fixed on the diaphragm, and the side of the adjusting member close to the center magnet has a different magnetic polarity from the side of the center magnet close to the adjusting member.

[0016] In an alternative embodiment, the adjusting member is a memory metal member, one end of the adjusting member is connected with the center magnet, and the other end of the adjusting member is connected with the diaphragm.

[0017] The adjusting member has a compressed state and an extended state, in the hearing aid compatible mode, the adjusting member is in the compressed state, and in the normal operation mode, the adjusting member is in the extended state.

[0018] In an alternative embodiment, the diaphragm is in thermal connection with the adjusting member and the voice coil respectively.

[0019] In the hearing aid compatible mode, the power amplifier outputs a first current to the voice coil, so that the voice coil is at a first temperature, thereby deforming the adjusting member to the compressed state; in the normal operation mode, the power amplifier outputs a second current to the voice coil, so that the voice coil is at a second temperature, thereby deforming the adjusting member to the extended state.

[0020] In an optional embodiment, the loudspeaker further comprises a support, the diaphragm is fixed on the support, and the support is mounted on the edge magnet.

[0021] In an optional embodiment, the support is a deformable structure, and the support is capable of being deformed along the arrangement direction of the diaphragm and the center magnet, thereby serving as the adjusting member to adjust the distance between the diaphragm and the center magnet, and to switch the loudspeaker between the hearing aid compatible mode and the regular working mode.

[0022] In an optional embodiment, the loudspeaker further comprises a power amplifier, the voice coil is electrically connected with the power amplifier and the support respectively, the support is provided with a piezoelectric element or a memory metal member, and the power amplifier deforms the piezoelectric element or the memory metal member by outputting an electric current to the voice coil, so as to deform the support along the arrangement direction of the diaphragm and the center magnet.

[0023] In an optional embodiment, in the regular working mode, the distance between the diaphragm and the center magnet is greater than the amplitude of the diaphragm, so that the diaphragm can vibrate to produce sound.

[0024] In a second aspect, the embodiments of the present application provide an electronic device, which comprises the loudspeaker of any one of the first aspect.

[0025] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects: in the hearing aid compatible mode, the voice coil is used to send an electromagnetic signal to a hearing aid, so that the hearing aid can convert the electromagnetic signal into sound, thereby enabling a user using the hearing aid to normally receive a phone call, and realizing the HAC function of the loudspeaker; in the hearing aid compatible mode, the diaphragm is fixed on the center magnet by the adjusting member, so that the diaphragm is static and no sound is emitted, thereby ensuring that the loudspeaker has no sound leakage during a call, avoiding the leakage of user privacy due to the sound leakage, and meanwhile, after the voice coil is fixed, the voice coil can avoid causing signal nonlinear distortion due to the movement in the magnetic gap; in the regular working mode, the diaphragm is separated from the center magnet, so that the diaphragm can be driven by the voice coil to vibrate to produce sound, thereby ensuring that the loudspeaker normally produces sound. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0027] Figure 1A structure schematic diagram of a loudspeaker in a normal working mode is provided for one of the embodiments of the present application.

[0028] Figure 2 A structure schematic diagram of a loudspeaker in a hearing aid compatible mode is provided for one of the embodiments of the present application.

[0029] Figure 3 A structure schematic diagram of a loudspeaker is provided for the second embodiment of the present application.

[0030] Figure 4 A structure schematic diagram of a loudspeaker is provided for the third embodiment of the present application.

[0031] Figure 5 A structure schematic diagram of a loudspeaker is provided for the fourth embodiment of the present application.

[0032] Figure 6 A signal transmission schematic diagram of a loudspeaker is provided for the embodiments of the present application.

[0033] The reference signs in the drawings respectively represent:

[0034] 1 - loudspeaker;

[0035] 11 - center magnet; 111 - gap; 12 - side magnet; 13 - voice coil; 14 - diaphragm; 15 - adjusting piece; 151 - rough surface paste; 152 - hook surface paste; 16 - power amplifier; 17 - magnetic conductive sheet; 171 - air vent; 18 - shell; 181 - accommodating cavity; 19 - support;

[0036] 100 - chip.

[0037] The specific embodiments of the present application have been shown in the above drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work are within the scope of protection of the present application.

[0039] The positional nouns such as “upper”, “lower”, “lateral” and the like involved in the embodiments of the present application are generally taken with reference to the drawings. Figure 1The relative relationship of the orientations shown in the figures is taken as a reference, and these orientation terms are used only for more clearly describing the structure and the relationship between structures, and are not used to describe absolute orientations. When the product is placed in different postures, the orientations may change, for example, "upper" and "lower" may be interchanged.

[0040] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by one of ordinary skill in the art. Some technical terms appearing in the embodiments of the present application are explained below.

[0041] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0042] As Figures 1 to 5 shown, the embodiments of the present application provide a loudspeaker 1, which comprises a center magnet 11, a side magnet 12, a voice coil 13, a diaphragm 14 and an adjusting piece 15.

[0043] The loudspeaker 1 is applied to an electronic device, which includes but is not limited to a mobile phone, a notebook computer, a tablet computer, a personal digital assistant (PDA), an e-book reader, an MP3 (Moving Picture Experts Group Audio Layer III) player, an MP4 (Moving Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a palm game console, a virtual and reality device, an augmented reality device, etc.

[0044] The side magnet 12 is arranged around the outer periphery of the center magnet 11, and there is a gap 111 between the side magnet 12 and the center magnet 11. The diaphragm 14 is arranged opposite to the center magnet 11, and the voice coil 13 is connected with the diaphragm 14 and extends into the gap 111.

[0045] The loudspeaker 1 has a hearing aid compatible mode and a normal working mode, as Figure 2 shown, in the hearing aid compatible mode, the adjusting piece 15 is used to fix the diaphragm 14 on the center magnet 11, and the voice coil 13 is used to send an electromagnetic signal to a hearing aid; in the normal working mode, the diaphragm 14 is separated from the center magnet 11. Wherein, "the diaphragm 14 is separated from the center magnet 11" means that the diaphragm 14 is not fixed on the center magnet 11, and the diaphragm 14 can normally vibrate and sound.

[0046] Specifically, when the user uses the hearing aid compatible mode to make a call, the hearing aid is used together with the electronic device, the voice coil 13 sends electromagnetic signals to the hearing aid, the hearing aid receives the electromagnetic signals and converts them into sound, so that the user can normally hear the phone, and the HAC function is realized. In the normal working mode, the loudspeaker 1 can be used as the receiver of the electronic device, and the loudspeaker 1 can normally emit sound.

[0047] The center magnet 11 and the edge magnet 12 both have magnetism. Exemplarily, the number of the edge magnet 12 is multiple, and the multiple edge magnets 12 are distributed at the outer periphery of the center magnet 11 at intervals.

[0048] As shown in Figures 1 to 5 , the diaphragm 14 and the center magnet 11 are distributed at intervals along the height direction of the loudspeaker 1, and the diaphragm 14 is located above the center magnet 11. It can be understood that Figures 1 to 5 the vertical direction in the above is the height direction of the loudspeaker 1.

[0049] The voice coil 13 is annular and connected to one side of the diaphragm 14 close to the center magnet 11, and a magnetic circuit is formed between the center magnet 11 and the edge magnet 12, and the voice coil 13 is inserted into the magnetic circuit. In the normal working mode, the voice coil 13 can reciprocate in the magnetic circuit along the height direction of the loudspeaker 1, thereby driving the diaphragm 14 to vibrate and emit corresponding sound.

[0050] The adjusting piece 15 can fix the diaphragm 14 on the center magnet 11 in the hearing aid compatible mode, so that the diaphragm 14 is stationary and does not emit sound, and the loudspeaker 1 can ensure no sound leakage while the user uses the hearing aid to hear the sound, fully protecting the user's call privacy. Moreover, the diaphragm 14 cannot move in the magnetic gap after being fixed, which can avoid the generation of signal nonlinear distortion and help improve the signal quality.

[0051] Exemplarily, the adjusting piece 15 can receive an electrical signal and can actively switch between the effective state and the ineffective state. For example, after the user switches to the hearing aid compatible mode, the adjusting piece 15 receives the corresponding electrical signal and enters the effective state, thereby fixing the diaphragm 14 on the center magnet 11; after the user switches to the normal working mode, the adjusting piece 15 receives the corresponding electrical signal and enters the ineffective state, thereby separating the diaphragm 14 from the center magnet 11, and the diaphragm 14 can vibrate and emit sound.

[0052] Alternatively, the adjusting member 15 can be switched between the effective state and the ineffective state passively under the driving of the driving element. For example, after the user switches to the hearing aid compatible mode, the driving element receives a corresponding electrical signal and drives the adjusting member 15, so that the adjusting member 15 enters the effective state, thereby fixing the diaphragm 14 on the center magnet 11; after the user switches to the regular working mode, the driving element receives a corresponding electrical signal and drives the adjusting member 15, so that the adjusting member 15 enters the ineffective state, thereby separating the diaphragm 14 from the center magnet 11, and the diaphragm 14 can vibrate and sound.

[0053] Optionally, the loudspeaker 1 further comprises a shell 18 and a magnetic conducting sheet 17, the shell 18 has a containing cavity 181, and the center magnet 11, the side magnet 12, the voice coil 13, the diaphragm 14, the adjusting member 15 and the magnetic conducting sheet 17 are all located in the containing cavity 181. The magnetic conducting sheet 17 is fixed in the containing cavity 181 by adhesion or the like, and the center magnet 11 and the side magnet 12 are both arranged on the magnetic conducting sheet 17. The center magnet 11, the side magnet 12 and the magnetic conducting sheet 17 cooperate to provide a permanent magnetic field for the voice coil 13.

[0054] As shown in Figure 1 , the magnetic conducting sheet 17 and the shell 18 are both provided with air release holes 171. The air release holes 171 are through holes, and the air release holes 171 are used to ensure the balance of the air pressure inside and outside the loudspeaker 1, to ensure that the loudspeaker 1 can smoothly exchange gas with the outside world, to prevent the diaphragm 14 from being damaged, and to effectively protect the acoustic performance of the loudspeaker 1.

[0055] Among them, the number of air release holes 171 opened on the magnetic conducting sheet 17 can be one or more, and the number of air release holes 171 opened on the shell 18 can be one or more.

[0056] The loudspeaker 1 provided by the embodiment of the present application has the following advantages. In the hearing aid compatible mode, the voice coil 13 is used to send electromagnetic signals to the hearing aid, so that the hearing aid can convert the electromagnetic signals into sound, thereby enabling the user using the hearing aid to normally receive a phone call, and realizing the HAC function of the loudspeaker 1. By fixing the diaphragm 14 on the center magnet 11 through the adjusting member 15 in the hearing aid compatible mode, the diaphragm 14 is stationary and no sound is emitted, thereby ensuring that the loudspeaker 1 does not leak sound during a call, avoiding the leakage of user privacy due to sound leakage, and meanwhile, after the voice coil 13 is fixed, the voice coil 13 can avoid signal nonlinear distortion caused by movement in the magnetic gap. In the regular working mode, the diaphragm 14 is separated from the center magnet 11, so that the diaphragm 14 can be driven by the voice coil 13 to vibrate and sound, thereby ensuring that the loudspeaker 1 normally sounds.

[0057] In a further embodiment, the loudspeaker 1 also includes a power amplifier 16 electrically connected to the voice coil 13. The power amplifier 16 drives the voice coil 13 to move along the arrangement direction of the diaphragm 14 and the central magnet 11 in normal operating mode, thereby causing the diaphragm 14 to vibrate and produce sound. It is understood that the arrangement direction of the diaphragm 14 and the central magnet 11 is... Figures 1 to 5 The vertical direction in the middle.

[0058] The power amplifier 16 is used to amplify the weak electrical signal from the signal source in order to drive the speaker 1 to emit sound.

[0059] In normal operating mode, the power amplifier 16 drives the voice coil 13 to move along the height direction of the speaker 1 in the magnetic circuit, thereby causing the diaphragm 14 to vibrate and produce corresponding sound.

[0060] like Figure 6 As shown, in normal operating mode, the power amplifier 16 receives signals from the chip 100 of the electronic device, amplifies the signals, and transmits them to the voice coil 13, causing the voice coil 13 to convert the electrical signals into mechanical vibrations, which in turn drive the diaphragm 14 to vibrate and produce sound; Figure 6 As shown, in hearing aid compatible mode, power amplifier 16 receives the downlink audio signal from chip 100 of electronic device, amplifies the signal and transmits it to voice coil 13. Voice coil 13 emits electromagnetic signals so that hearing aid receives the electromagnetic signals and converts them into sound.

[0061] Furthermore, the power amplifier 16 is also used to receive the first control signal and the second control signal.

[0062] After receiving the first control signal, the power amplifier 16 drives the voice coil 13 to move towards the side closer to the central magnet 11, so that the adjusting member 15 fixes the diaphragm 14 on the central magnet 11, thereby enabling the speaker 1 to operate in hearing aid compatible mode.

[0063] After receiving the second control signal, the power amplifier 16 drives the voice coil 13 to move away from the central magnet 11, causing the diaphragm 14 to separate from the central magnet 11, thereby enabling the speaker 1 to operate in the normal working mode.

[0064] For example, chip 100 of the electronic device is electrically connected to power amplifier 16, and chip 100 is used to send a first control signal and a second control signal to power amplifier 16. The first control signal is used to instruct speaker 1 to switch to hearing aid compatible mode, and the second control signal is used to instruct speaker 1 to switch to normal operating mode.

[0065] In this embodiment, the power amplifier 16 drives the voice coil 13 to move and further drives the adjusting member 15 to passively switch between the effective state and the ineffective state.

[0066] After the chip 100 sends the first control signal, the power amplifier 16 receives the first control signal, drives the voice coil 13 to move towards the side close to the center magnet 11, and drives the adjusting member 15 to enter the effective state, so as to fix the diaphragm 14 on the center magnet 11, and the speaker 1 switches to the hearing aid compatible mode.

[0067] After the chip 100 sends the second control signal, the power amplifier 16 receives the second control signal, drives the voice coil 13 to move away from the center magnet 11, and drives the adjusting member 15 to enter the effective state, so as to separate the diaphragm 14 from the center magnet 11, and the diaphragm 14 can vibrate and emit sound, and the speaker 1 switches to the normal working mode.

[0068] In an optional embodiment, the adjusting member 15 is a double-sided adhesive, an electrostatic sticker or a magic sticker, and the adjusting member 15 is arranged between the diaphragm 14 and the center magnet 11.

[0069] In this embodiment, the adjusting member 15 is a sticky and re-stickable sticker, and the diaphragm 14 is fixed on the center magnet 11 by the adhesion of the adjusting member 15 itself.

[0070] For example, as shown in FIG. 1, the adjusting member 15 is a double-sided adhesive, and the adjusting member 15 is attached to the side surface of the center magnet 11 close to the diaphragm 14. Figure 1 Alternatively, the adjusting member 15 is a double-sided adhesive, and the adjusting member 15 is attached to the side surface of the diaphragm 14 close to the center magnet 11.

[0071] For another example, as shown in FIG. 2, the adjusting member 15 is a magic sticker, and the adjusting member 15 includes a fuzzy surface sticker 151 and a hook surface sticker 152. Figure 3 The fuzzy surface sticker 151 and the hook surface sticker 152 are arranged on the side surface of the center magnet 11 close to the diaphragm 14 and the side surface of the diaphragm 14 close to the center magnet 11 respectively, and the fuzzy surface sticker 151 and the hook surface sticker 152 face each other and can be adhered to or separated from each other.

[0072] Specifically, after the chip 100 sends the first control signal, the power amplifier 16 receives the first control signal, drives the voice coil 13 to move towards the side close to the center magnet 11, and drives the adjusting member 15 to enter the effective state, so as to fix the diaphragm 14 on the center magnet 11, and the speaker 1 switches to the hearing aid compatible mode.

[0073] After the chip 100 sends the second control signal, the power amplifier 16 receives the second control signal and drives the voice coil 13 to move away from the central magnet 11, overcoming the adhesive force of the adjusting member 15, so that the diaphragm 14 is separated from the central magnet 11. At this time, the speaker 1 switches to the normal working mode.

[0074] In another alternative embodiment, the adjusting member 15 is a magnetic member, which is fixed on the diaphragm 14, and the side of the adjusting member 15 near the central magnet 11 has different magnetic polarities from the side of the central magnet 11 near the adjusting member 15.

[0075] For example, the adjusting element 15 is a magnetic sheet. (e.g.) Figure 4 As shown, the adjusting member 15 is disposed on the diaphragm 14, specifically it can be pasted onto the diaphragm 14 or embedded in the diaphragm 14. The adjusting member 15 has different magnetic polarities on both sides in its thickness direction, and the side of the adjusting member 15 near the central magnet 11 has different magnetic polarities than the side of the central magnet 11 near the adjusting member 15. For example, the lower side of the adjusting member 15 is the S pole, and the upper side of the central magnet 11 is the N pole.

[0076] In this embodiment, there is a magnetic attraction between the adjusting member 15 and the central magnet 11. The diaphragm 14 is fixed on the central magnet 11 by utilizing the attraction between opposite poles of the adjusting member 15 and the central magnet 11.

[0077] Specifically, after the chip 100 sends out the first control signal, the power amplifier 16 receives the first control signal and drives the voice coil 13 to move towards the side closer to the central magnet 11 until the adjustment member 15 magnetically engages with the central magnet 11. At this time, the diaphragm 14 is fixed and cannot move, and the speaker 1 switches to the hearing aid compatible mode.

[0078] After the chip 100 sends the second control signal, the power amplifier 16 receives the second control signal and drives the voice coil 13 to move away from the central magnet 11, overcoming the magnetic attraction between the adjusting member 15 and the central magnet 11, so that the diaphragm 14 separates from the central magnet 11. At this time, the speaker 1 switches to the normal working mode.

[0079] In yet another alternative embodiment, such as Figure 5 As shown, the adjustment element 15 is a shape memory metal component. One end of the adjustment element 15 is connected to the central magnet 11, and the other end is connected to the diaphragm 14. The adjustment element 15 has a compressed form and an extended form. In the hearing aid compatible mode, the adjustment element 15 is in the compressed form; in the normal working mode, the adjustment element 15 is in the extended form.

[0080] Memory metal, also known as shape memory alloy, is a special type of metallic material that can recover its original macroscopic shape after undergoing plastic deformation within a certain temperature range, and then recovering its original macroscopic shape within another temperature range.

[0081] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0082] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0083] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0084] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0085] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0086] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0087] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0088] In this embodiment, by setting the adjusting member 15 as a memory metal member, and connecting the two ends of the adjusting member 15 with the center magnet 11 and the diaphragm 14 respectively, the interval between the center magnet 11 and the diaphragm 14 can be changed by the shape characteristics of the memory metal, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound.

[0089] After the chip 100 sends out the first control signal, the power amplifier 16 receives the first control signal, drives the voice coil 13 to move to the side close to the center magnet 11, at the same time, the power amplifier 16 outputs the first current to the voice coil 13, so that the voice coil 13 is at the first temperature, and the adjusting piece 15 is compressed and deformed to the compressed form at the first temperature, at this time, the diaphragm 14 is fixed and cannot move, and the speaker 1 switches to the hearing aid compatible mode.

[0090] After the chip 100 sends out the second control signal, the power amplifier 16 receives the second control signal, drives the voice coil 13 to move to the side away from the center magnet 11, at the same time, the power amplifier 16 outputs the second current to the voice coil 13, so that the voice coil 13 is at the second temperature, and the adjusting piece 15 restores to the stretched form at the second temperature, at this time, the distance between the diaphragm 14 and the center magnet 11 is larger, and the diaphragm 14 can vibrate and sound under the driving of the voice coil 13.

[0091] In one embodiment, the speaker 1 further comprises a support 19, the diaphragm 14 is fixed on the support 19, and the support 19 is installed on the side magnet 12.

[0092] As shown in Figure 1 , the support 19 is bent, and the diaphragm 14 is connected with the side magnet 12 through the support 19 to realize the fixation of the diaphragm 14.

[0093] In a further embodiment, the support 19 is a deformable structure, and the support 19 can be deformed along the arrangement direction of the diaphragm 14 and the center magnet 11, so as to adjust the distance between the diaphragm 14 and the center magnet 11 as the adjusting piece 15, and switch the speaker 1 between the hearing aid compatible mode and the normal working mode.

[0094] In this embodiment, the support 19 is used as the adjusting piece 15, and the distance between the center magnet 11 and the diaphragm 14 is changed by using the deformable support 19, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound. At the same time, the existing support 19 in the speaker 1 is used as the adjusting piece 15, without the need for additional elements, which is conducive to reducing the space occupied by the speaker 1 and reducing the production cost.

[0095] In this embodiment, the support 19 is used as the adjusting piece 15, and the distance between the center magnet 11 and the diaphragm 14 is changed by using the deformable support 19, so as to fix the diaphragm 14 or enable the diaphragm 14 to vibrate and sound. At the same time, the existing support 19 in the speaker 1 is used as the adjusting piece 15, without the need for additional elements, which is conducive to reducing the space occupied by the speaker 1 and reducing the production cost.

[0096] For example, the shape of the bracket 19 can be changed by altering parameters such as temperature, current, and voltage, so that the bracket 19 can switch between a first form and a second form.

[0097] In one specific embodiment, the loudspeaker 1 further includes a power amplifier 16, and a voice coil 13 is electrically connected to the power amplifier 16 and the bracket 19. The bracket 19 is provided with a piezoelectric element or a shape memory metal element. The power amplifier 16 outputs current to the voice coil 13 to deform the piezoelectric element or shape memory metal element, thereby causing the bracket 19 to deform along the arrangement direction of the diaphragm 14 and the central magnet 11.

[0098] When an electric field is applied in the polarization direction of a dielectric, the dielectric will deform. When the electric field is removed, the deformation of the dielectric disappears. This phenomenon is called the inverse piezoelectric effect. Utilizing the inverse piezoelectric effect of the piezoelectric element, different currents are output to the voice coil 13 through the power amplifier 16 to change the current flowing through the piezoelectric element, thereby causing the piezoelectric element to deform and thus prompting the support 19 to switch between the first and second states.

[0099] When the bracket 19 is equipped with a memory metal component, the power amplifier 16 outputs different currents to the voice coil 13 to change the current flowing through the memory metal component, thereby changing the temperature of the memory metal component, causing the memory metal to deform, and prompting the bracket 19 to switch between the first and second forms.

[0100] In this embodiment, the power amplifier 16 outputs different currents to the voice coil 13, thereby changing the magnitude of the current flowing through the piezoelectric element or the temperature of the memory metal element, so that the bracket 19 switches between the first and second modes, and thus the speaker 1 switches between the hearing aid compatible mode and the normal operating mode.

[0101] In the normal operating mode, the distance between the diaphragm 14 and the central magnet 11 is greater than the amplitude of the diaphragm 14, so that the diaphragm 14 can vibrate and produce sound.

[0102] It should be noted that the amplitude of diaphragm 14 is the maximum absolute value of diaphragm 14 moving away from the equilibrium position during vibration.

[0103] like Figure 1 As shown, line a represents the upper amplitude position of diaphragm 14, line b represents the equilibrium position of diaphragm 14, and line c represents the lower amplitude position of diaphragm 14. In the vertical direction, the distance between line a and line b, or the distance between line b and line c, is the amplitude of diaphragm 14. The upper end face of the central magnet 11 is located below line c, meaning that the distance between diaphragm 14 and central magnet 11 is greater than the amplitude of diaphragm 14.

[0104] Through the arrangement, the vibration sound of the diaphragm 14 in the normal working mode is not affected, and the diaphragm 14 is prevented from contacting the center magnet 11 to cause noise.

[0105] When the adjusting member 15 is arranged on the center magnet 11, as shown in Figure 1 the adjusting member 15 and the diaphragm 14 are spaced apart by a distance greater than the amplitude of the diaphragm 14, so that the diaphragm 14 is not in contact with the adjusting member 15, and the vibration sound of the diaphragm 14 is not affected.

[0106] When the adjusting member 15 is arranged on the diaphragm 14, the adjusting member 15 and the center magnet 11 are spaced apart by a distance greater than the amplitude of the diaphragm 14, so that the diaphragm 14 is not fixed on the center magnet 11 by the adjusting member 15, and the vibration sound of the diaphragm 14 is not affected.

[0107] When the adjusting member 15 is divided into two parts, and one part is arranged on the center magnet 11 and the other part is arranged on the diaphragm 14, the two parts of the adjusting member 15 are spaced apart by a distance greater than the amplitude of the diaphragm 14, so that the two parts of the adjusting member 15 are prevented from contacting during the vibration of the diaphragm 14, and the diaphragm 14 is prevented from being fixed on the center magnet 11 by the adjusting member 15.

[0108] The embodiments of the present application also provide an electronic device, which comprises the loudspeaker 1 provided by any of the above embodiments.

[0109] The electronic device includes, but is not limited to, a mobile phone, a notebook computer, a tablet computer, a personal digital assistant (PDA), an e-book reader, an MP3 (Moving Picture Experts Group Audio Layer III) player, an MP4 (Moving Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a palm game console, a virtual and reality device, an augmented reality device, etc.

[0110] Exemplarily, the loudspeaker 1 is arranged at the top of the electronic device, and the loudspeaker 1 also serves as a receiver of the electronic device.

[0111] In the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" means two or more, unless otherwise explicitly limited.

[0112] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application cover any and all variations of the application that come within the scope of the

[0113] It is understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A loudspeaker (1), characterized in that, The loudspeaker (1) includes a center magnet (11), a side magnet (12), a voice coil (13), a diaphragm (14), and an adjustment element (15); The side magnet (12) is arranged around the outer periphery of the central magnet (11), and there is a gap (111) between the side magnet (12) and the central magnet (11). The diaphragm (14) is arranged opposite to the central magnet (11). The voice coil (13) is connected to the diaphragm (14) and the voice coil (13) extends into the gap (111). The loudspeaker (1) has a hearing aid compatible mode and a normal operating mode. In the hearing aid compatible mode, the adjustment member (15) fixes the diaphragm (14) to the central magnet (11), and the voice coil (13) is used to send electromagnetic signals to the hearing aid. In the normal operating mode, the diaphragm (14) is separated from the central magnet (11).

2. The loudspeaker (1) according to claim 1, characterized in that, The loudspeaker (1) also includes a power amplifier (16), which is electrically connected to the voice coil (13). The power amplifier (16) is used to drive the voice coil (13) to move along the arrangement direction of the diaphragm (14) and the central magnet (11) in the normal operating mode, so that the diaphragm (14) is driven by the voice coil (13) and vibrates to produce sound.

3. The loudspeaker (1) according to claim 2, characterized in that, The power amplifier (16) is also used to receive a first control signal and a second control signal; After receiving the first control signal, the power amplifier (16) drives the voice coil (13) to move closer to the central magnet (11), so that the adjusting member (15) fixes the diaphragm (14) on the central magnet (11), thereby enabling the speaker (1) to operate in hearing aid compatible mode. After receiving the second control signal, the power amplifier (16) drives the voice coil (13) to move away from the central magnet (11), causing the diaphragm (14) to separate from the central magnet (11), thereby enabling the loudspeaker (1) to operate in normal working mode.

4. The loudspeaker (1) according to claim 3, characterized in that, The adjusting member (15) is a double-sided adhesive tape, an electrostatic tape, or a Velcro, and the adjusting member (15) is disposed between the diaphragm (14) and the central magnet (11).

5. The loudspeaker (1) according to claim 3, characterized in that, The adjusting member (15) is a magnetic member, and the adjusting member (15) is fixed on the diaphragm (14). The side of the adjusting member (15) near the central magnet (11) has different magnetic polarities from the side of the central magnet (11) near the adjusting member (15).

6. The loudspeaker (1) according to claim 3, characterized in that, The adjusting member (15) is a shape memory metal part. One end of the adjusting member (15) is connected to the central magnet (11), and the other end is connected to the diaphragm (14). The adjustment member (15) has a compressed form and an extended form. In the hearing aid compatible mode, the adjustment member (15) is in the compressed form. In the normal operating mode, the adjusting member (15) is in the extended position.

7. The loudspeaker (1) according to claim 6, characterized in that, The diaphragm (14) is thermally connected to the adjusting member (15) and the voice coil (13) respectively; In the hearing aid compatible mode, the power amplifier (16) outputs a first current to the voice coil (13), causing the voice coil (13) to be at a first temperature, thereby causing the adjustment member (15) to deform to the compression state; In the normal operating mode, the power amplifier (16) outputs a second current to the voice coil (13), causing the voice coil (13) to be at a second temperature, thereby causing the adjustment member (15) to deform to the extended shape.

8. The loudspeaker (1) according to any one of claims 1 to 7, characterized in that, The loudspeaker (1) also includes a bracket (19), the diaphragm (14) is fixed on the bracket (19), and the bracket (19) is mounted on the side magnet (12).

9. The loudspeaker (1) according to claim 8, characterized in that, The bracket (19) is a deformable structure. The bracket (19) can deform along the arrangement direction of the diaphragm (14) and the central magnet (11), thereby acting as the adjustment member (15) to adjust the distance between the diaphragm (14) and the central magnet (11), so that the speaker (1) can switch between the hearing aid compatible mode and the normal working mode.

10. The loudspeaker (1) according to claim 9, characterized in that, The loudspeaker (1) also includes a power amplifier (16), the voice coil (13) is electrically connected to the power amplifier (16) and the bracket (19) respectively, the bracket (19) is provided with a piezoelectric element or a shape memory metal part, the power amplifier (16) outputs current to the voice coil (13) to deform the piezoelectric element or the shape memory metal part, thereby causing the bracket (19) to deform along the arrangement direction of the diaphragm (14) and the central magnet (11).

11. The loudspeaker (1) according to claim 1, characterized in that, In the normal operating mode, the distance between the diaphragm (14) and the central magnet (11) is greater than the amplitude of the diaphragm (14) so ​​that the diaphragm (14) can vibrate and produce sound.

12. An electronic device, characterized in that, The electronic device includes the speaker (1) as described in any one of claims 1 to 11.

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