Sound production device and electronic equipment

Abstract

The utility model belongs to the technical field of electroacoustic conversion, and provides a sounding device and electronic equipment, the sounding device comprises a housing assembly, the housing assembly is internally provided with a double-sided sounding monomer, the double-sided sounding monomer comprises a first sounding unit and a second sounding unit which are oppositely arranged, the first sounding unit comprises a first diaphragm assembly, and the second sounding unit comprises a second diaphragm assembly. The second sound production unit comprises a second vibrating diaphragm assembly, a first front cavity area is formed between the first vibrating diaphragm assembly and the inner wall of the shell assembly, the shell assembly is provided with a first sound outlet communicated with the first front cavity area, and a second front cavity area is formed between the second vibrating diaphragm assembly and the inner wall of the shell assembly. The shell assembly is provided with a second sound outlet communicated with the second front cavity area; wherein the sound outlet area of the first sound outlet is S1, the area of the second sound outlet is S2, and S1 / S2 is greater than or equal to 1 / 3 and less than or equal to 3. According to the sound production device provided by the utility model, by limiting the areas of the two sound outlets, the optimal sound wave offset effect can be achieved, and the privacy protection effect in the telephone receiver call mode is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic conversion, in particular to a sound-generating device and an electronic device. Background Art

[0002] With the expansion of the consumer electronics market, consumer electronics products such as mobile phones and laptops have been widely used. Mobile terminal devices such as mobile phones usually have two speakers, one of which is at the bottom of the phone. It has high sensitivity and good mid- and high-frequency sound, so it is often used as an external speaker to play incoming call ringtones or music; the other speaker is at the top of the phone. It has low sensitivity and good low-frequency sound, so it is often used as a receiver during calls.

[0003] The speakers of current mobile terminal devices usually have only one set of diaphragm components and can only produce sound on one side. When the devices are used close to the user's ear, such as when answering a call, there is usually a problem of sound leakage, which is very detrimental to the protection of personal privacy, and the stereo playback effect needs to be further improved.

[0004] In order to make electronic products (such as mobile phones) have a better stereo effect when in the external speaker mode and a better privacy protection effect when in the handset mode, the speaker is usually designed as a double-sided sound structure, so that two sound waves with the same phase are emitted for superposition and enhancement to improve the stereo effect of the speaker in the external speaker mode, or two sound waves with opposite phases are emitted based on the acoustic dipole effect to offset and attenuate to improve the privacy protection effect in the handset mode. However, the current double-sided sound speakers have poor consistency in the FR frequency response curves on both sides, which makes the offset effect of the two sound waves with opposite phases poor, and thus it is difficult to achieve effective privacy protection in the handset mode, and the call privacy of the device needs to be improved. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the inventors conducted in-depth research and completed the present utility model after paying a lot of creative work.

[0006] Specifically, the technical problem to be solved by the utility model is to provide a sound-emitting device and an electronic device to solve the technical problem that the current double-sided sound-emitting speakers have poor consistency in the FR frequency response curves on both sides, resulting in poor cancellation effect of two sound waves with opposite phases, and thus poor call privacy of the device.

[0007] In order to solve the above technical problems, the technical solution of the utility model is:

[0008] A sound-emitting device comprises a shell component, the shell component is provided with a receiving space, a double-sided sound-emitting unit is provided in the receiving space, the double-sided sound-emitting unit comprises a first sound-emitting unit and a second sound-emitting unit arranged opposite to each other, the first sound-emitting unit comprises a first diaphragm component, the second sound-emitting unit comprises a second diaphragm component, a first front cavity area is formed between the first diaphragm component and the inner wall of the shell component, the shell component is provided with a first sound outlet connected to the first front cavity area, a second front cavity area is formed between the second diaphragm component and the inner wall of the shell component, the shell component is provided with a second sound outlet connected to the second front cavity area; wherein,

[0009] The sound outlet area of ​​the first sound outlet is S1, the area of ​​the second sound outlet is S2, and 1 / 3≤S1 / S2≤3.

[0010] According to some embodiments of the present invention, the outer surface of the shell assembly includes a first plane and a second plane, the first sound outlet is arranged on the first plane, the second sound outlet is arranged on the second plane, and the angle α between the first plane and the second plane satisfies the relationship: 0°≤α≤90°.

[0011] According to some embodiments of the present invention, the first diaphragm assembly and the second diaphragm assembly both vibrate along a first direction, the first front cavity area includes a first area opposite to the first diaphragm assembly along the first direction and a first sound duct respectively connecting the first area and the first sound outlet, and the minimum inner diameter of the first sound duct along the flow direction of the airflow is W1, the second front cavity area includes a second area opposite to the second diaphragm assembly along the first direction and a second sound duct respectively connecting the second area and the second sound outlet, and the minimum inner diameter of the second sound duct along the flow direction of the airflow is W2, 1 / 3≤W1 / W2≤3, and / or, -2mm≤W1-W2≤2mm.

[0012] According to some embodiments of the present invention, the first diaphragm assembly and the second diaphragm assembly both vibrate along a first direction, and along the first direction, the minimum distance between the inner circumferential wall of the shell assembly located on the side of the first diaphragm assembly facing away from the second diaphragm assembly and the first diaphragm assembly is D1, and the minimum distance between the inner circumferential wall of the shell assembly located on the side of the second diaphragm assembly facing away from the first diaphragm assembly and the second diaphragm assembly is D2, 1 / 3≤D1 / D2≤3, and / or, -2mm≤D1-D2≤2mm.

[0013] According to some embodiments of the present invention, the sound outlet area of ​​the first sound outlet is S1 and the area of ​​the second sound outlet is S2, which satisfies the relationship: -100mm 2 ≤S1-S2≤100mm2 .

[0014] According to some embodiments of the present invention, the high frequency cutoff frequency of the first sounding unit is g, the high frequency cutoff frequency of the second sounding unit is h, -4kHz≤gh≤4kHz;

[0015] And / or, the resonance frequency F01 of the first sound unit, the resonance frequency F02 of the second sound unit, -100Hz≤F01- F02≤100Hz;

[0016] And / or, a difference between the frequency response curve FR1 of the first sound emitting unit and the frequency response curve FR2 of the second sound emitting unit satisfies: -3dB≤FR1-FR2≤3dB.

[0017] According to some embodiments of the present invention, the first sound emitting unit and the second sound emitting unit share the same rear sound cavity, and the volume V of the rear sound cavity satisfies: V≥0.1cc.

[0018] According to some embodiments of the utility model, the double-sided sound-emitting unit further includes a housing component, wherein a magnetic circuit system is provided in the housing component, and the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap;

[0019] The first sound-emitting unit further includes a first centering support and a first voice coil, the outer periphery of the first diaphragm assembly is fixed to the housing assembly, the first voice coil is located between the first centering support and the first diaphragm assembly, one end of the first voice coil is connected to the first diaphragm assembly, the other end of the first voice coil is inserted into the first magnetic gap, one end of the first centering support is connected to the housing assembly, and the other end of the first centering support is connected to a side of the first voice coil away from the first diaphragm assembly;

[0020] The second sound unit also includes a second centering support plate and a second voice coil. The outer periphery of the second diaphragm assembly is fixed to the shell assembly. The second centering support plate is located between the second diaphragm assembly and the second voice coil. One end of the second voice coil is connected to the side of the second centering support plate away from the second diaphragm assembly, and the other end of the second voice coil is inserted into the second magnetic gap.

[0021] According to some embodiments of the present invention, the housing assembly includes a first housing and a second housing connected to the first housing, the outer periphery of the first diaphragm assembly is fixed to the first housing, and the outer periphery of the second diaphragm assembly is fixed to the second housing;

[0022] The magnetic circuit system includes a magnetic yoke and a magnetic circuit assembly, wherein the magnetic yoke is fixed to the second shell, and the magnetic yoke includes a main body and a bent portion connecting the main body and the second shell, and the magnetic circuit assembly includes a central magnet, a central magnetic plate, a side magnet and a side magnetic plate, wherein the central magnet is disposed on the main body and is disposed on a side of the main body facing the second diaphragm assembly, the central magnetic plate is located on a side of the central magnet away from the main body and is connected to the central magnet, and the central magnet is sandwiched between the central magnetic plate and the main body;

[0023] The bending portion includes a first extension portion and a second extension portion, two ends of the first extension portion are respectively connected to the main body portion and the second extension portion, the first extension portion extends relative to the main body portion in a direction close to the second diaphragm assembly, and the second extension portion extends relative to the main body portion in a direction away from the center magnet, the side magnet is arranged on the second extension portion and on a side of the second extension portion facing the first diaphragm assembly, the side magnet and the circumferential edge of the center magnet are spaced apart, the side magnetic conductive plates are fixed to the first shell and are respectively located on a side of the side magnet away from the second extension portion, the first magnetic gap is defined between the first extension portion and the side magnet, and the second magnetic gap is defined between the first extension portion and the center magnet.

[0024] The utility model also discloses an electronic device, comprising the sound generating device of the above embodiment of the utility model.

[0025] After adopting the above technical solution, the beneficial effects of the utility model are:

[0026] The sound-emitting device, in which the first sound-emitting unit and the second sound-emitting unit are arranged relative to each other, can realize independent control of vibration, can emit two sound waves with the same phase for superposition and enhancement to improve the stereo effect in the product external speaker mode, or can emit two sound waves with opposite phases based on the acoustic dipole effect for offset and attenuation to improve the privacy protection effect in the handset call mode; by limiting the sound output areas of the first sound outlet and the second sound outlet, the frequency response curves of the first sound-emitting unit and the second sound-emitting unit can be kept as consistent as possible, thereby achieving the optimal sound wave offset effect, improving the privacy protection effect in the handset call mode, and realizing the optimal call privacy protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 This is a schematic cross-sectional view of a sound-generating device according to an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the explosion structure of a sound-generating device according to an embodiment of the utility model;

[0030] Figure 3 This is a schematic cross-sectional view of a double-sided sound-emitting unit according to an embodiment of the utility model;

[0031] Figure 4 Another cross-sectional structural schematic diagram of a double-sided sound-emitting unit according to an embodiment of the utility model;

[0032] Reference numerals:

[0033] 100- sound generating device;

[0034] 10-housing assembly; 1a-first plane; 1b-second plane; 11-first housing; 12-second housing; 13-module housing; 14-sealing foam; 15-first dustproof net;

[0035] 20-Double-sided sound unit;

[0036] 21-housing assembly; 211-first housing; 212-second housing;

[0037] 22-magnetic yoke; 221-body; 222-bending portion; 2221-first extension portion; 2222-second extension portion;

[0038] 23-magnetic circuit assembly; 231-center magnet; 232-center magnetic plate; 233-side magnet; 234-side magnetic plate;

[0039] 24-first sound unit; 241-first diaphragm assembly; 2411-first diaphragm; 2412-first vibration plate; 242-first centering support; 243-first voice coil;

[0040] 25-second sound unit; 251-second diaphragm assembly; 2511-second diaphragm; 2512-second vibration plate; 252-second centering support; 253-second voice coil;

[0041] 26-front cover;

[0042] 27- second dust screen;

[0043] 30-first front cavity area; 31-first area; 32-first sound pipe;

[0044] 40 - second front cavity area; 41 - second area; 42 - second sound pipe;

[0045] 50-posterior vocal cavity;

[0046] 60-first sound outlet;

[0047] 70- Second sound outlet. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0051] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0052] like Figures 1 to 4As shown together, the sound-emitting device 100 according to the embodiment of the utility model includes a shell component 10, the shell component 10 is provided with a receiving space, and a double-sided sound-emitting unit 20 is provided in the receiving space, and the double-sided sound-emitting unit 20 includes a first sound-emitting unit 24 and a second sound-emitting unit 25 arranged opposite to each other, the first sound-emitting unit 24 includes a first diaphragm component 241, and the second sound-emitting unit 25 includes a second diaphragm component 251, and a first front cavity area 30 is formed between the first diaphragm component 241 and the inner wall of the shell component 10, and the shell component 10 is provided with a first sound outlet 60 connected to the first front cavity area 30, and the first diaphragm component 241 works by vibrating to promote the change of airflow in the first front cavity area 30, and at the first outlet The sound is emitted from the sound outlet 60, and a second front cavity area 40 is formed between the second diaphragm assembly 251 and the inner wall of the shell assembly 10. The shell assembly 10 is provided with a second sound outlet 70 connected with the second front cavity area 40. When the second diaphragm assembly 251 works, it drives the airflow in the second front cavity area 40 to change by vibration, and emits sound at the second sound outlet 70. Since the first sound unit 24 and the second sound unit 25 are arranged relative to each other, independent vibration control can be achieved, and two sound waves with the same phase can be emitted for superposition and enhancement to improve the stereo effect of the product in the external speaker mode, or two sound waves with opposite phases can be emitted based on the acoustic dipole effect to offset and attenuate to improve the privacy protection effect in the handset call mode.

[0053] Among them, Figure 1 As shown, the sound outlet area of ​​the first sound outlet 60 is S1, the area of ​​the second sound outlet 70 is S2, and 1 / 3≤S1 / S2≤3. By limiting the sound outlet area of ​​the first sound outlet 60 and the second sound outlet 70, the high frequency cutoff frequency of the frequency band between the intermediate frequency and the high frequency and the Q value of the frequency band between the low frequency and the intermediate frequency of the sound waves of the first sound unit 24 and the second sound unit 25 will be directly affected, so that the frequency response curves of the first sound unit 24 and the second sound unit 25 can be kept as consistent as possible, thereby achieving the best sound wave cancellation effect, improving the privacy protection effect in the handset call mode, and achieving the best call privacy protection.

[0054] In some embodiments of the present invention, Figure 1 As shown, the outer surface of the housing assembly 10 includes a first plane 1a and a second plane 1b, the first sound outlet 60 is arranged on the first plane 1a, the second sound outlet 70 is arranged on the second plane 1b, and the angle α between the first plane 1a and the second plane 1b satisfies the relationship: 0°≤α≤90°. Therefore, when the angle α between the first plane 1a and the second plane 1b is 0°, the first sound outlet 60 and the second sound outlet 70 are respectively located on opposite sides of the housing assembly 10, and when the angle α between the first plane 1a and the second plane 1b is in the range of 0° to 90°, the projection surfaces of the first sound outlet 60 and the second sound outlet 70 can overlap.

[0055] In a specific embodiment of the present invention, Figure 1 As shown, the angle α between the first plane 1a and the second plane 1b is 90°, that is, the first plane 1a where the first sound outlet 60 is located and the second plane 1b where the second sound outlet 70 is located are adjacent planes perpendicular to each other, which can make the sound waves of the first sound outlet 60 and the second sound outlet 70 cancel each other better in the far field, thereby further improving the effect of privacy calls.

[0056] In some embodiments of the present invention, Figures 1 to 4 As shown, the first diaphragm assembly 241 and the second diaphragm assembly 251 both vibrate along the first direction, the first front cavity area 30 includes a first area 31 opposite to the first diaphragm assembly 241 along the first direction and a first sound duct 32 respectively connecting the first area 31 and the first sound outlet 60, and the minimum inner diameter of the first sound duct 32 along the flow direction of the airflow is W1, the second front cavity area 40 includes a second area 41 opposite to the second diaphragm assembly 251 along the first direction and a second sound duct 42 respectively connecting the second area 41 and the second sound outlet 70, and the minimum inner diameter of the second sound duct 42 along the flow direction of the airflow is W2, 1 / 3≤W1 / W2≤3, and / or, -2mm≤W1-W2≤2mm.

[0057] It is understandable that when W1 / W2 is less than 1 / 3, that is, the minimum inner diameter of the second sound tube 42 is much larger than the minimum inner diameter of the first sound tube 41, this will affect the mutual cancellation effect of the sound waves generated by the first sound unit 24 and the second sound unit 25, affecting the call privacy effect. Similarly, when W1 / W2 is greater than 3, that is, the minimum inner diameter of the first sound tube 41 is much larger than the minimum inner diameter of the second sound tube 42, this will also affect the mutual cancellation effect of the sound waves generated by the first sound unit 24 and the second sound unit 25, affecting the call privacy effect. When 1 / 3≤W1 / W2≤3, it can further ensure that the high frequency cutoff frequency of the frequency band between the intermediate frequency and the high frequency of the sound waves of the first sound unit 24 and the second sound unit 25 and the Q value of the frequency band between the low frequency and the intermediate frequency meet the requirements of the consistency of the frequency response curve, so that the frequency response curves of the first sound unit 24 and the second sound unit 25 can be kept as consistent as possible, thereby achieving the best sound wave cancellation effect, improving the privacy protection effect in the handset call mode, and achieving the best call privacy protection; when -2mm≤W1-W2≤2mm, it can meet the design requirements of small and medium-sized speakers. Optionally, W1 / W2 can be 1 / 3, 1, 2, and 3, etc.

[0058] In some embodiments of the present invention, Figures 1 to 4As shown, the first diaphragm assembly 241 and the second diaphragm assembly 251 both vibrate along the first direction. Along the first direction, the minimum distance between the inner circumferential wall of the shell assembly 10 located on the side of the first diaphragm assembly 241 away from the second diaphragm assembly 251 and the first diaphragm assembly 241 is D1, and the minimum distance between the inner circumferential wall of the shell assembly 10 located on the side of the second diaphragm assembly 251 away from the first diaphragm assembly 241 and the second diaphragm assembly 251 is D2, 1 / 3≤D1 / D2≤3, and / or, -2mm≤D1-D2≤2mm.

[0059] It is understandable that when D1 / D2 is less than 1 / 3, that is, the minimum distance between the inner circumferential wall of the shell assembly 10 on the side of the second diaphragm assembly 251 away from the first diaphragm assembly 241 and the second diaphragm assembly 251 is much larger than the minimum distance between the inner circumferential wall of the shell assembly 10 on the side of the first diaphragm assembly 241 away from the second diaphragm assembly 251 and the first diaphragm assembly 241, thereby affecting the mutual cancellation effect of the sound waves generated by the first sound unit 24 and the second sound unit 25, affecting the call privacy effect. Similarly, when D1 / D2 is greater than 3, that is, the minimum distance between the inner circumferential wall of the shell assembly 10 on the side of the first diaphragm assembly 241 away from the second diaphragm assembly 251 and the first diaphragm assembly 241 is much larger than the minimum distance between the inner circumferential wall of the shell assembly 10 on the side of the second diaphragm assembly 251 away from the first diaphragm assembly 241 and the second diaphragm assembly 251, thereby also affecting the mutual cancellation effect of the sound waves generated by the first sound unit 24 and the second sound unit 25, affecting the call privacy effect. When 1 / 3≤D1 / D2≤3, it can further ensure that the high frequency cutoff frequency of the frequency band between the intermediate frequency and the high frequency of the sound waves of the first sound unit 24 and the second sound unit 25 and the Q value of the frequency band between the low frequency and the intermediate frequency meet the requirements of the consistency of the frequency response curve, so that the frequency response curves of the first sound unit 24 and the second sound unit 25 can be kept as consistent as possible, thereby achieving the best sound wave cancellation effect, improving the privacy protection effect in the handset call mode, and achieving the best call privacy protection; when -2mm≤D1-D2≤2mm, it can meet the design requirements of small and medium-sized speakers. Optionally, D1 / D2 can be 1 / 3, 1, 2, and 3, etc.

[0060] In some embodiments of the present invention, Figure 1 As shown, the sound outlet area of ​​the first sound outlet 60 is S1 and the area of ​​the second sound outlet 70 is S2, which satisfies the relationship: -100mm 2 ≤S1-S2≤100mm 2 . Thus, the design requirements of small and medium-sized speakers can be met.

[0061] In some embodiments of the utility model, based on the limitation of the above-mentioned design structure, the difference between the maximum airflow velocity v1 of the first front cavity area 30 and the first sound outlet 60 and the maximum airflow velocity v2 of the second front cavity area 40 and the second sound outlet 70 can satisfy: -20m / s≤v1-v2≤20m / s. When v1-v2<-20m / s, that is, the maximum airflow velocity of the second front cavity area 40 and the second sound outlet 70 is much greater than the maximum airflow velocity of the first front cavity area 30 and the first sound outlet 60, which will make the sound quality difference large and the sound quality poor. Similarly, when v1-v2>20m / s, that is, the maximum airflow velocity of the first front cavity area 30 and the first sound outlet 60 is much greater than the maximum airflow velocity of the second front cavity area 40 and the second sound outlet 70, which will also make the sound quality difference large and the sound quality poor. When -20m / s≤v1-v2≤20m / s, the acoustic impedance of the first front cavity area 30 and the first sound outlet 60 can be made consistent with the acoustic impedance of the second front cavity area 40 and the second sound outlet 70, so that the sound quality is not much different and the sound quality is better.

[0062] In some embodiments of the present invention, Figures 1 to 4 As shown, the high frequency cutoff frequency of the first sound unit 24 is g, the high frequency cutoff frequency of the second sound unit 25 is h, and the high frequency cutoff frequencies of the first sound unit 24 and the second sound unit 25 satisfy: -4kHz≤gh≤4kHz. The high-frequency cutoff frequency is a resonance peak between the intermediate frequency and the high frequency, and is a part of the frequency response curve. By limiting the difference in the high-frequency cutoff frequencies of the first sound unit 24 and the second sound unit 25 as mentioned above, by limiting -4kHz≤gh≤4kHz, the resonance peaks of the first sound unit 24 and the second sound unit 25 can be basically overlapped, and then the frequency response curves of the first sound unit 24 and the second sound unit 25 are basically overlapped, thereby achieving the best cancellation effect and the best privacy call effect. When the difference in the high-frequency cutoff frequencies of the first sound unit 24 and the second sound unit 25 is less than -4kHz or greater than 4kHz, the difference in the high-frequency cutoff frequencies of the first sound unit 24 and the second sound unit 25 is too large, which will make the first sound unit 24 have poor cancellation effect on the intermediate and high frequency sound waves of the second sound unit 25, and there will be a problem of call leakage.

[0063] In some embodiments of the present invention, Figures 1 to 4As shown, the resonance frequency F01 of the first sound unit 24 and the resonance frequency F02 of the second sound unit 25 satisfy: -100Hz≤F01- F02≤100Hz. The resonance frequency corresponds to the low frequency band of the frequency response curve. By limiting the difference in the resonance frequencies of the first sound unit 24 and the second sound unit 25 as above, the low frequency bands of the frequency response curves of the first sound unit 24 and the second sound unit 25 can be basically overlapped, thereby achieving the best cancellation effect and the best privacy call effect. When the difference in the resonance frequencies of the first sound unit 24 and the second sound unit 25 is less than -100Hz or greater than 100Hz, the difference in the resonance frequencies of the first sound unit 24 and the second sound unit 25 is too large. At this time, the first sound unit 24 has a poor cancellation effect on the low frequency band sound waves of the second sound unit 25, and there will be a problem of call leakage.

[0064] In some embodiments of the present invention, Figures 1 to 4 As shown, the difference between the frequency response curve FR1 of the first sound unit 24 and the frequency response curve FR2 of the second sound unit 25 satisfies: -3dB≤FR1-FR2≤3dB. Thus, the call loudness meets the use requirements and can achieve a good sound leakage prevention effect; when in use, one side of the first sound unit 24 of the sound device 100 is the side close to the user's ear. If the difference between the frequency response curve FR1 of the first sound unit 24 and the frequency response curve FR2 of the second sound unit 25 is less than -3dB, the call loudness of the first sound unit 24 is too low, the call sound is not clear, and the call loudness of the second sound unit 25 is too high, the cancellation is serious, and the sound leakage prevention effect is poor; if the difference between the frequency response curve FR1 of the first sound unit 24 and the frequency response curve FR2 of the second sound unit 25 is greater than 3dB, although the call loudness of the first sound unit 24 meets the use requirements, the call loudness of the second sound unit 25 is too low, the cancellation effect is poor, and there is also a serious sound leakage problem.

[0065] In some embodiments of the present invention, Figure 1 As shown, the first sound unit 24 and the second sound unit 25 share the same rear sound cavity 50, and the volume V of the rear sound cavity 50 satisfies: V ≥ 0.1cc. The first sound unit 24 and the second sound unit 25 share the same rear sound cavity 50, so that the volume of the rear sound cavity 50 can be made larger, the low-frequency effect is better, and during the vibration process, air flow exchange can be achieved, which improves the quality of sound playback and has a good stereo effect in the external speaker mode. In addition, the volume setting of the rear sound cavity 50 can ensure that the sound device 100 has a certain loudness when working, and the loudness enables the user to clearly hear the call sound. If the volume of the rear sound cavity 50 is less than 0.1cc, the loudness during the call is too small and the call sound is not clear.

[0066] In some embodiments of the present invention, Figures 1 to 4 As shown, the double-sided sound-emitting monomer 20 also includes a shell component 21, and a magnetic circuit system is provided in the shell component 21, and the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap; the first sound-emitting unit 24 also includes a first centering support piece 242 and a first voice coil 243, the outer periphery of the first diaphragm component 241 is fixed to the shell component 21, the first voice coil 243 is located between the first centering support piece 242 and the first diaphragm component 241, one end of the first voice coil 243 is connected to the first diaphragm component 241, and the other end of the first voice coil 243 is inserted into the first magnetic gap, and the first centering support piece 242 is fixed to the outer periphery of the first diaphragm component 241. One end is connected to the shell assembly 21, and the other end of the first centering support plate 242 is connected to the side of the first voice coil 243 away from the first diaphragm assembly 241; the second sound unit 25 also includes a second centering support plate 252 and a second voice coil 253, the outer periphery of the second diaphragm assembly 251 is fixed to the shell assembly 21, the second centering support plate 252 is located between the second diaphragm assembly 251 and the second voice coil 253, one end of the second voice coil 253 is connected to the side of the second centering support plate 252 away from the second diaphragm assembly 251, and the other end of the second voice coil 253 is inserted in the second magnetic gap. Therefore, the first sound unit 24 and the second sound unit 25 share the same magnetic circuit system, which can improve the utilization rate of the magnetic field and reduce the volume of the double-sided sound unit 20. The first sound unit 24 and the second sound unit 25 are relatively independent and can independently control vibration, so as to emit two sound waves with the same phase for superposition and enhancement to improve the stereo effect of the product in the external speaker mode, or emit two sound waves with opposite phases based on the acoustic dipole effect to offset and attenuate to improve the privacy protection effect in the handset call mode.

[0067] In some embodiments of the present invention, Figure 3 , Figure 4As shown, the first centering support piece 242 and the second centering support piece 252 each include an inner fixing portion, a connecting portion and an outer fixing portion, and the two ends of the connecting portion are respectively connected to the inner fixing portion and the outer fixing portion. The first centering support piece 242 can be two support piece structures that are opposite and spaced apart, or it can be four support piece structures distributed in an array. The inner fixing portion of the first centering support piece 242 is connected to the first voice coil 243, and the outer fixing portion of the first centering support piece 242 is connected to the housing assembly 21. Thus, the first centering support piece 242 can be connected to the bottom or side wall of the first voice coil 243, which can play a role in balancing the first sound unit 24; the second centering support piece 252 includes an annular outer fixing portion, and the inner fixing portion of the second centering support piece 252 On the circumferential inner side of the outer fixing part, the connecting part is located between the inner fixing part and the outer fixing part, and the connecting part is provided with multiple parts and respectively connects the outer fixing part and the inner fixing part. The inner fixing part of the second centering support piece 252 is connected to the second voice coil 253, and the outer fixing part of the second centering support piece 252 is connected to the outer shell assembly 21. Thus, the second centering support piece 252 can be connected to one end of the second voice coil 253. The second centering support piece 252 is located between the second voice coil 253 and the second diaphragm assembly 251, and can play a role in balancing the second sound unit 25.

[0068] In some embodiments of the present invention, Figure 3 , Figure 4As shown, the housing assembly 21 includes a first housing 211 and a second housing 212 connected to the first housing 211, the outer periphery of the first diaphragm assembly 241 is fixed to the first housing 211, and the outer periphery of the second diaphragm assembly 251 is fixed to the second housing 212; the magnetic circuit system includes a magnetic yoke 22 and a magnetic circuit assembly 23, the magnetic yoke 22 is fixed to the second housing 212, and the magnetic yoke 22 includes a main body 221 and a bending portion 222 connecting the main body 221 and the second housing 212, and the magnetic circuit assembly 23 includes a central magnet 231, a central magnetic plate 232, a side magnet 233 and a side magnetic plate 234, the central magnet 231 is arranged on the main body 221, and is arranged on a side of the main body 221 facing the second diaphragm assembly 251, the central magnetic plate 232 is located on a side of the central magnet 231 away from the main body 221 and connected to the central magnet 231, and the central magnet 231 is sandwiched between the central magnetic plate 232 and the main body 221; the bending portion 222 includes a first extension portion 2221 and a second extension portion 2222, the first extension portion 2221 The two ends of the first extension portion 2221 are connected to the main body 221 and the second extension portion 2222 respectively. The first extension portion 2221 extends relative to the main body 221 toward the direction close to the second diaphragm assembly 251. The second extension portion 2222 extends relative to the main body 221 toward the direction away from the center magnet 231. One end of the second extension portion 2222 is connected to the first extension portion 2221. The other end of the second extension portion 2222 is fixed to the second housing 212 and is integrally injection molded with the second housing 212. The side magnet 233 is disposed on the second extension portion 22 22 and is arranged on a side of the second extension portion 2222 facing the first diaphragm assembly 241, the side magnet 233 and the circumferential edge of the center magnet 231 are spaced apart, the side magnetic conductive plate 234 is fixed to the first shell 211 and is integrally injection molded with the first shell 211, the side magnetic conductive plates 234 are respectively located on a side of the side magnet 233 away from the second extension portion 2222, a first magnetic gap is defined between the first extension portion 2221 and the side magnet 233, and a second magnetic gap is defined between the first extension portion 2221 and the center magnet 231.

[0069] In some embodiments of the present invention, Figure 3 , Figure 4 As shown, the first diaphragm assembly 241 includes a first diaphragm 2411 and a first vibration plate 2412 arranged on the first diaphragm 2411, and the outer periphery of the first diaphragm 2411 is fixed to the first shell 211; the second diaphragm assembly 251 includes a second diaphragm 2511 and a second vibration plate 2512 arranged on the second diaphragm 2511, and the outer periphery of the second diaphragm 2511 is fixed to the second centering support plate 252.

[0070] In one embodiment of the present invention, Figure 3 , Figure 4As shown, the double-sided sound-emitting unit 20 further includes a front cover 26 and a second dust-proof net 27, one side of the front cover 26 is connected to the first housing 211, and the second dust-proof net 27 is connected to the other side of the front cover 26. Of course, in some cases, the double-sided sound-emitting unit 20 may also not include the front cover 26 and the second dust-proof net 27.

[0071] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the shell assembly 10 includes a first shell 11, a second shell 12 and a module shell 13. The first shell 11 is connected to the second shell 12 to form a receiving space. A sealing foam 14 is provided between the first shell 11 and the second shell 12 to achieve an effective sealing connection between the first shell 11 and the second shell 12. The double-sided sound-emitting unit 20 is arranged in the receiving space, and the first diaphragm assembly 241 faces the first shell 11. The first diaphragm assembly 241 and the inner wall of the first shell 11 define a first area 31. The module shell 13 is located between the double-sided sound-emitting unit 20 and the second shell 12. The module shell 13 is connected to the second shell 12. The second diaphragm assembly 251 faces the module shell 13. The second diaphragm assembly 251 and the inner wall of the module shell 13 define a second area 41. A first dustproof net 15 is provided between the module shell 13 and the second shell 12. The first dustproof net 15 is arranged close to the second sound outlet 70, which can effectively prevent dust and the like from entering the shell assembly 10.

[0072] The utility model also discloses an electronic device, comprising the sound-generating device 100 described in the above embodiment of the utility model,

[0073] The specific structure of the sound-emitting device 100 refers to the aforementioned embodiment. Since the electronic device adopts all the technical features of the aforementioned sound-emitting device 100, the electronic device has a good privacy protection function during calls and a good stereo effect in the external speaker mode.

[0074] Optionally, the electronic device in the present invention may be a mobile phone, earphones, a watch or a computer, etc., which will not be described in detail here.

[0075] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A sound-generating device, characterized in that: It comprises a shell component, the shell component is provided with a receiving space, a double-sided sound-emitting unit is provided in the receiving space, the double-sided sound-emitting unit comprises a first sound-emitting unit and a second sound-emitting unit arranged opposite to each other, the first sound-emitting unit comprises a first diaphragm component, the second sound-emitting unit comprises a second diaphragm component, a first front cavity area is formed between the first diaphragm component and the inner wall of the shell component, the shell component is provided with a first sound outlet connected to the first front cavity area, a second front cavity area is formed between the second diaphragm component and the inner wall of the shell component, the shell component is provided with a second sound outlet connected to the second front cavity area; wherein, The sound outlet area of ​​the first sound outlet is S1, the area of ​​the second sound outlet is S2, and 1 / 3≤S1 / S2≤3.

2. The sound generating device according to claim 1, characterized in that: The outer surface of the shell assembly includes a first plane and a second plane. The first sound outlet is arranged on the first plane, and the second sound outlet is arranged on the second plane. The angle α between the first plane and the second plane satisfies the relationship: 0°≤α≤90°.

3. The sound generating device according to claim 1, characterized in that: The first diaphragm assembly and the second diaphragm assembly both vibrate along a first direction, the first front cavity area includes a first area opposite to the first diaphragm assembly along the first direction and a first sound pipe respectively connecting the first area and the first sound outlet, and the minimum inner diameter of the first sound pipe along the flow direction of the airflow is W1, the second front cavity area includes a second area opposite to the second diaphragm assembly along the first direction and a second sound pipe respectively connecting the second area and the second sound outlet, and the minimum inner diameter of the second sound pipe along the flow direction of the airflow is W2, 1 / 3≤W1 / W2≤3, and / or, -2mm≤W1-W2≤2mm.

4. The sound generating device according to claim 1, characterized in that: Both the first diaphragm assembly and the second diaphragm assembly vibrate along a first direction. Along the first direction, a minimum distance between an inner circumferential wall of the shell assembly on a side of the first diaphragm assembly facing away from the second diaphragm assembly and the first diaphragm assembly is D1, and a minimum distance between an inner circumferential wall of the shell assembly on a side of the second diaphragm assembly facing away from the first diaphragm assembly and the second diaphragm assembly is D2, 1 / 3≤D1 / D2≤3, and / or, -2mm≤D1-D2≤2mm.

5. The sound generating device according to claim 1, characterized in that: The sound outlet area of ​​the first sound outlet is S1 and the area of ​​the second sound outlet is S2, which satisfies the relationship: -100mm 2 ≤S1-S2≤100mm 2 .

6. The sound generating device according to claim 1, characterized in that: The high frequency cutoff frequency of the first sounding unit is g, and the high frequency cutoff frequency of the second sounding unit is h, -4kHz≤gh≤4kHz; And / or, the resonance frequency F01 of the first sound unit, the resonance frequency F02 of the second sound unit, -100Hz≤F01- F02≤100Hz; And / or, a difference between the frequency response curve FR1 of the first sound emitting unit and the frequency response curve FR2 of the second sound emitting unit satisfies: -3dB≤FR1-FR2≤3dB.

7. The sound generating device according to claim 1, characterized in that: The first sound emitting unit and the second sound emitting unit share the same rear sound cavity, and the volume V of the rear sound cavity satisfies: V≥0.1cc.

8. The sound generating device according to claim 1, characterized in that: The double-sided sound-emitting unit further comprises a housing component, wherein a magnetic circuit system is arranged in the housing component, and the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap; The first sound-emitting unit further includes a first centering support and a first voice coil, the outer periphery of the first diaphragm assembly is fixed to the housing assembly, the first voice coil is located between the first centering support and the first diaphragm assembly, one end of the first voice coil is connected to the first diaphragm assembly, the other end of the first voice coil is inserted into the first magnetic gap, one end of the first centering support is connected to the housing assembly, and the other end of the first centering support is connected to a side of the first voice coil away from the first diaphragm assembly; The second sound unit also includes a second centering support plate and a second voice coil. The outer periphery of the second diaphragm assembly is fixed to the shell assembly. The second centering support plate is located between the second diaphragm assembly and the second voice coil. One end of the second voice coil is connected to the side of the second centering support plate away from the second diaphragm assembly, and the other end of the second voice coil is inserted into the second magnetic gap.

9. The sound generating device according to claim 8, characterized in that: The housing assembly comprises a first housing and a second housing connected to the first housing, the outer periphery of the first diaphragm assembly is fixed to the first housing, and the outer periphery of the second diaphragm assembly is fixed to the second housing; The magnetic circuit system includes a magnetic yoke and a magnetic circuit assembly, wherein the magnetic yoke is fixed to the second shell, and the magnetic yoke includes a main body and a bent portion connecting the main body and the second shell, and the magnetic circuit assembly includes a central magnet, a central magnetic plate, a side magnet and a side magnetic plate, wherein the central magnet is disposed on the main body and is disposed on a side of the main body facing the second diaphragm assembly, the central magnetic plate is located on a side of the central magnet away from the main body and is connected to the central magnet, and the central magnet is sandwiched between the central magnetic plate and the main body; The bending portion includes a first extension portion and a second extension portion, two ends of the first extension portion are respectively connected to the main body portion and the second extension portion, the first extension portion extends relative to the main body portion in a direction close to the second diaphragm assembly, and the second extension portion extends relative to the main body portion in a direction away from the center magnet, the side magnet is arranged on the second extension portion and on a side of the second extension portion facing the first diaphragm assembly, the side magnet and the circumferential edge of the center magnet are spaced apart, the side magnetic conductive plates are fixed to the first shell and are respectively located on a side of the side magnet away from the second extension portion, the first magnetic gap is defined between the first extension portion and the side magnet, and the second magnetic gap is defined between the first extension portion and the center magnet.

10. An electronic device, characterized in that: Comprising a sound-generating device according to any one of claims 1-9.

Images