CN114866912A

CN114866912A - Sounding device, sounding module and terminal equipment

Info

Publication number: CN114866912A
Application number: CN202210346956.1A
Authority: CN
Inventors: 蔡晓东; 刘松; 郎贤忠; 张成飞; 刘春发
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-05

Abstract

The invention discloses a sounding device, a sounding module and terminal equipment, wherein the sounding device comprises a telephone receiving unit and a loudspeaking unit, and the loudspeaking unit is arranged back to the telephone receiving unit; the sound production device also comprises a magnetic circuit system, and a vibration system of the receiver unit and a vibration system of the loudspeaker unit are arranged on two opposite sides of the magnetic circuit system; the magnetic circuit system comprises an inner magnet, a middle magnet, an outer magnet and magnetic conduction plates arranged on two sides of the inner magnet, the middle magnet and the outer magnet, a first magnetic gap corresponding to the telephone receiving unit is formed between the middle magnet and the inner magnet, and a second magnetic gap corresponding to the loudspeaker unit is formed between the middle magnet and the outer magnet; the middle magnet is of an annular structure and isolates the first magnetic gap from the second magnetic gap; a first back cavity is formed between the first vibrating diaphragm of the telephone receiving unit and the magnetic circuit system; a second back cavity is formed between the second diaphragm of the loudspeaker unit and the magnetic circuit system; the first back cavity and the second back cavity are arranged in a separated mode. The technical scheme of the invention improves the sound production effect of the sound production device.

Description

Sounding device, sounding module and terminal equipment

Technical Field

The invention relates to the technical field of electroacoustic transduction, in particular to a sounding device, a sounding module and terminal equipment.

Background

At present, in order to enable an electronic product (for example, a mobile phone) in the related art to have a better stereo effect when the electronic product is in a speaker out mode and a better privacy protection effect when the electronic product is in a receiver phone mode, the mobile phone is provided with a better stereo effect. Usually, a speaker module is used to superimpose a receiver unit (defined as scheme one) in an audio system of an electronic product, or a double-sided sounding unit (defined as scheme two) is directly used, so as to emit two sound waves with the same phase to perform superimposition enhancement to improve a stereo effect in a speaker play mode, or emit two sound waves with opposite phases to perform cancellation attenuation based on an acoustic dipole effect to improve a privacy protection effect in a receiver talk mode.

However, there are still more drawbacks when using the above-mentioned first and second solutions. Specifically, in scheme one: the speaker module and the receiver monomer are two independent devices, and the speaker module and the receiver monomer are required to be stacked back to back when being installed in the shell of the terminal equipment. The back-to-back stacking arrangement inevitably causes the two devices to occupy a very large installation space in the stacking direction during installation, but the thickness of the terminal equipment is generally relatively thin, so that the whole of the speaker module and the receiver unit which are stacked and arranged is difficult to install in the casing of the terminal equipment. At the same time, the two separate components also result in a relatively large number of overall parts, which increases the overall manufacturing costs of the terminal device. And in scheme two: two sets of vibration systems in the monomer of two-sided vocal are usually set up to a sharing acoustics rear chamber, and two sets of vibration systems are when working separately this moment, because sharing acoustics rear chamber can make the air current influence of mutual interference when flowing, so influenced each vibration system's vibration state and cause a series of problems such as nonlinear distortion rising and sway vibration abnormal sound, lead to influencing final vocal effect.

Disclosure of Invention

The invention mainly aims to provide a sound production device, aiming at improving the sound production effect of the sound production device.

In order to achieve the above object, the sound producing device provided by the present invention includes a receiver unit and a speaker unit, wherein the speaker unit is arranged opposite to the receiver unit;

the sound production device further comprises a magnetic circuit system, and the vibration system of the telephone receiving unit and the vibration system of the loudspeaker unit are arranged on two opposite sides of the magnetic circuit system;

the magnetic circuit system comprises an inner magnet, a middle magnet, an outer magnet and magnetic conduction plates arranged on two sides of the inner magnet, the middle magnet and the outer magnet, wherein a first magnetic gap corresponding to the telephone receiving unit is formed between the middle magnet and the inner magnet, and a second magnetic gap corresponding to the loudspeaker unit is formed between the middle magnet and the outer magnet;

wherein the middle magnet is of an annular structure, and the middle magnet isolates the first magnetic gap from the second magnetic gap;

the telephone receiving unit comprises a first vibrating diaphragm, and a first back cavity is formed between the first vibrating diaphragm and the magnetic circuit system; the loudspeaker unit comprises a second diaphragm, and a second back cavity is formed between the second diaphragm and the magnetic circuit system; the first rear cavity and the second rear cavity are arranged in a separated mode.

In an embodiment of the present invention, the magnetic conductive plates include a first magnetic conductive plate and a second magnetic conductive plate, and the first magnetic conductive plate and the second magnetic conductive plate are respectively disposed on two sides of the inner magnet, the middle magnet, and the outer magnet; the second magnetic conduction plate is not provided with an opening at a position corresponding to the first magnetic gap so as to seal the bottom end of the first magnetic gap.

In an embodiment of the present invention, a first frame is disposed between the first diaphragm and the first magnetic conductive plate, and the first back cavity is formed among the first diaphragm, the first frame, and the first magnetic conductive plate.

In an embodiment of the present invention, a side surface of the first magnetic conducting plate close to the first diaphragm protrudes outward to form the first frame body; or, the first frame body and the first magnetic conduction plate are of a split structure.

In an embodiment of the invention, an installation boss is arranged on one side of the first magnetic conduction plate close to the first diaphragm, the first frame body is arranged on the installation boss, and a surface of one side of the first frame body far away from the first diaphragm abuts against a table-board of the installation boss.

In an embodiment of the invention, the first frame body and/or the first magnetic conductive plate is provided with a first communicating hole communicating the first rear cavity and a space outside the sound production device, and the first communicating hole is not communicated with the second rear cavity.

In an embodiment of the present invention, the first magnetic conductive plate is provided with a second communication hole communicating the second rear cavity with a space outside the sound generating device, and the second communication hole is not communicated with the first rear cavity.

In an embodiment of the invention, the first magnetic conducting plate is further provided with an avoiding opening at a position corresponding to the first magnetic gap, and the two short shaft sides opposite to the first magnetic conducting plate are both provided with the avoiding opening for avoiding a lead of the first voice coil of the telephone receiving unit.

In an embodiment of the present invention, a second frame is disposed between the second diaphragm and the second magnetic conductive plate, and the second back cavity is formed among the second diaphragm, the second frame, and the second magnetic conductive plate.

In an embodiment of the present invention, a supporting platform is disposed on an inner edge of the second frame, and an outer edge of the second magnetic conductive plate is disposed on a table surface of the supporting platform.

In an embodiment of the present invention, the outer magnet includes two short magnets and two long magnets, the two short magnets are respectively disposed on two opposite short axis sides of the middle magnet, and the two long magnets are respectively disposed on two opposite long axis sides of the middle magnet; the short magnets and the adjacent long magnets are arranged at intervals to form a third communication hole, and the second rear cavity is communicated with the space outside the sounding device through the third communication hole.

The invention also provides a sounding module, which comprises an expansion cavity and a sounding device; the expansion cavity is isolated from the first rear cavity and communicated with the second rear cavity; wherein, sound production device includes:

the system comprises a telephone receiving unit and a loudspeaker unit, wherein the loudspeaker unit is arranged back to the telephone receiving unit;

In an embodiment of the invention, the sound generating module further includes a fixed housing, the fixed housing fixes the sound generating device, and the fixed housing and the sound generating device enclose to form the cavity.

The present invention also provides a terminal device, including:

the device comprises a machine shell, a first connecting piece and a second connecting piece, wherein a mounting cavity is formed in the machine shell;

the sounding module is arranged in the installation cavity, and the installation cavity is isolated from the second rear cavity and communicated with the first rear cavity.

The sound production device in the technical scheme of the invention has the double functions of the loudspeaker function and the receiver function by arranging the receiver unit and the loudspeaker unit to respectively work through the receiver unit and the loudspeaker unit. Moreover, because the telephone receiving unit and the loudspeaker unit share one magnetic circuit system, compared with the simple back-to-back superposition combination of the telephone receiver module and the loudspeaker module, the sound production device in the scheme can reduce the number of the magnetic circuit systems, thereby being beneficial to simplifying the overall structure of the sound production device and reducing the overall thickness so as to improve the subsequent convenience of installation on the terminal equipment. Meanwhile, on the basis that the telephone receiving unit and the loudspeaker unit share one magnetic circuit system, the first diaphragm of the telephone receiving unit can be enclosed with the magnetic circuit system to form a first back cavity, and the second diaphragm of the loudspeaker unit can be enclosed with the magnetic circuit system to form a second back cavity isolated from the first back cavity. At this time, because the first back cavity in the telephone receiving unit and the second back cavity in the speaker unit are in an isolated state, the first diaphragm in the telephone receiving unit and the second diaphragm in the speaker unit vibrate in the first back cavity and the second back cavity respectively, and thus the sound wave cancellation effect cannot be caused due to mutual interference. Therefore, the telephone receiving unit and the loudspeaker unit can work normally and stably respectively, and the sound production effect of the sound production device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a terminal device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a sound module according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a part of a sound module according to an embodiment of the present invention;

FIG. 4 is a partial schematic view of the sound module of the present invention;

fig. 5 is a partially exploded view of the sound module of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1000	Terminal device	155a	Third communicating hole
100	Sound production module	157	Magnetic conductive plate
				10	Sound production device	1571	First magnetic conduction plate
11	Telephone receiver unit	157a	Mounting boss
				111	First diaphragm	157b	Second communication hole
112	First voice coil	157c	Dodging port
				11a	First rear cavity	1573	Second magnetic conduction plate
13	Loudspeaker unit	15a	First magnetic gap
				131	Second diaphragm	15b	Second magnetic gap
133	Second voice coil	17	First frame body
				13a	Second rear cavity	17a	First through hole
15	Magnetic circuit system	19	Second frame body
				151	Inner magnet	191	Supporting table
153	Intermediate magnet	30	Fixed outer casing
				155	External magnet	31	Expanding cavity
1551	Short magnet	300	Casing (CN)
				1553	Long magnet	301	Mounting cavity

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

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

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a sounding device 10, aiming at improving the sounding effect of the sounding device 10.

It can be understood that, the sound generating device 10 provided by the present invention is applied to the sound generating module 100, and the sound generating module 100 can be applied to various small-sized terminal devices 1000, for example: a mobile phone, a tablet computer, a television, a display, a notebook computer, a Digital photo frame, 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 handheld game console, a virtual reality device, an augmented reality device, a desktop speaker, etc. In addition, the sound module 100 of the present invention can also be applied to various medium-sized or large-sized terminal devices 1000, and is not described herein again.

The following will describe a specific structure of the sound producing device 10 of the present invention:

referring to fig. 1 to 5, in an embodiment of the sound generating device 10 of the present invention, the sound generating device 10 includes:

the mobile phone comprises a receiver unit 11 and a loudspeaker unit 13, wherein the loudspeaker unit 13 is arranged opposite to the receiver unit 11;

the sound production device 10 further comprises a magnetic circuit system 15, and the vibration system of the receiver unit 11 and the vibration system of the speaker unit 13 are arranged on two opposite sides of the magnetic circuit system 15;

the magnetic circuit system 15 includes an inner magnet 151, a middle magnet 153, an outer magnet 155, and magnetic conductive plates 157 disposed at two sides of the inner magnet 151, the middle magnet 153, and the outer magnet 155, wherein a first magnetic gap 15a corresponding to the receiver unit 11 is formed between the middle magnet 153 and the inner magnet 151, and a second magnetic gap 15b corresponding to the speaker unit 13 is formed between the middle magnet 153 and the outer magnet 155;

the middle magnet 153 has an annular structure, and the middle magnet 153 separates the first magnetic gap 15a from the second magnetic gap 15 b;

the receiver unit 11 includes a first diaphragm 111, and a first back cavity 11a is formed between the first diaphragm 111 and the magnetic circuit system 15; the speaker unit 13 includes a second diaphragm 131, and a second back cavity 13a is formed between the second diaphragm 131 and the magnetic circuit system 15; the first rear cavity 11a and the second rear cavity 13a are isolated.

In this embodiment, when the sound generating device 10 is horizontally placed, the sound generating device 10, the magnetic circuit system 15 and the receiver unit 11 may be sequentially stacked, in which case, a first magnetic gap 15a is formed on a side of the magnetic circuit system 15 facing the receiver unit 11, a second magnetic gap 15b is formed on a side of the magnetic circuit system 15 facing the speaker unit 13, and the first magnetic gap 15a is isolated from the second magnetic gap 15 b.

Specifically, the receiver unit 11 further includes a first voice coil 112, the first voice coil 112 is accommodated in the first back cavity 11a, one end of the first voice coil 112 is connected to the first diaphragm 111, and the opposite end is inserted into the first magnetic gap 15 a; similarly, the speaker unit 13 further includes a second voice coil 133, the second voice coil 133 is accommodated in the second back cavity 13a, one end of the second voice coil 133 is connected to the second diaphragm 131, and the other end is inserted into the second magnetic gap 15 b.

It can be understood that the sound generating device 10 according to the present invention is provided with the receiver unit 11 and the speaker unit 13, so that the sound generating device can be operated by the receiver unit 11 and the speaker unit 13, respectively, to have a dual function of a speaker function and a receiver function. Moreover, because the receiver unit 11 and the speaker unit 13 share one magnetic circuit system 15, compared with the simple back-to-back stacking combination of the receiver module and the speaker module, the sound generating device 10 in the present embodiment can reduce the number of the magnetic circuit systems 15, thereby facilitating the simplification of the overall structure of the sound generating device 10 and the reduction of the overall thickness to improve the convenience of the subsequent installation on the terminal device 1000. Meanwhile, on the basis that the receiver unit 11 and the speaker unit 13 share one magnetic circuit system 15, the first diaphragm 111 of the receiver unit 11 may enclose with the magnetic circuit system 15 to form a first back cavity 11a, and the second diaphragm 131 of the speaker unit 13 may enclose with the magnetic circuit system 15 to form a second back cavity 13a isolated from the first back cavity 11 a. At this time, since the first back cavity 11a of the receiver unit 11 and the second back cavity 13a of the speaker unit 13 are in an isolated state, the first diaphragm 111 of the receiver unit 11 and the second diaphragm 131 of the speaker unit 13 vibrate only in the first back cavity 11a and the second back cavity 13a, respectively, and thus do not interfere with each other to cause a sound wave cancellation effect. Therefore, the telephone receiving unit 11 and the loudspeaker unit 13 can work normally and stably respectively, and the sound production effect of the sound production device 10 is improved.

In other words, the sound-producing device 10 provided by the present embodiment has at least the following advantages:

firstly, the receiver unit 11 and the speaker unit 13 of the novel sound generating device 10 provided by this embodiment share one magnetic circuit system 15, so that compared with a simple back-to-back superposition combination of the receiver module and the speaker module, the sound generating device 10 in this embodiment can reduce the number of the magnetic circuit systems 15, thereby facilitating to simplify the overall structure of the sound generating device 10 and reduce the overall thickness to improve the convenience of subsequent installation on the terminal device 1000;

secondly, the receiver unit 11 and the speaker unit 13 adopt separate designs, so that the requirements of the acoustic device in different use scenes can be better met, for example, the stereo effect in the speaker play-out mode can be improved, or two sound waves with opposite phases are emitted based on the sound dipole effect to perform cancellation attenuation to improve the privacy protection effect in the earphone conversation mode;

thirdly, the novel sound generating device 10 provided by this embodiment can make the first diaphragm 111 in the receiving unit 11 and the second diaphragm 131 in the speaker unit 13 vibrate only in the first back cavity 11a and the second back cavity 13a, respectively, so that the mutual interference cannot occur to cause the sound wave cancellation effect, and the receiving unit 11 and the speaker unit 13 can both work normally and stably;

fourthly, in the solution of the novel sound generating device 10 provided in this embodiment, a first magnetic gap 15a corresponding to the receiving unit 11 is formed between the inner magnet 151 and the middle magnet 153 of the magnetic circuit system 15, a second magnetic gap 15b corresponding to the speaker unit 13 is formed between the middle magnet 153 and the outer magnet 155 of the magnetic circuit system 15, and the middle magnet 153 is in an annular structure, so that the first magnetic gap 15a and the second magnetic gap 15b can be isolated by the middle magnet 153, the first magnetic gap 15a and the second magnetic gap 15b can be isolated, and the first diaphragm 111 and the second diaphragm 131 will not interfere with each other to cause a sound wave cancellation effect;

fifth, the novel sound generating device 10 provided in this embodiment is also beneficial to implementing the coaxial design of the receiving unit 11 and the speaker unit 13, so that the phenomenon of sound channel separation is not generated, and the subjective listening experience is better.

Further, referring to fig. 1 to fig. 3 and fig. 5 in combination, in an embodiment of the sound generating device 10 of the present invention, the magnetic conductive plate 157 includes a first magnetic conductive plate 1571 and a second magnetic conductive plate 1573, where the first magnetic conductive plate 1571 and the second magnetic conductive plate 1573 are respectively disposed at two sides of the inner magnet 151, the middle magnet 153 and the outer magnet 155; the second magnetic conductive plate 1573 is not provided with an opening at a position corresponding to the first magnetic gap 15a, so as to close the bottom end of the first magnetic gap 15 a.

So set up, through making second magnetic conduction board 1573 not be provided with the trompil in the position that corresponds first magnetic gap 15a to seal the bottom in first magnetic gap 15a through second magnetic conduction board 1573, alright avoid first magnetic gap 15a to communicate in speaker unit 13's second back chamber 13a through the bottom, and then avoided first back chamber 11a of receiver unit 11 to communicate in speaker unit 13's second back chamber 13a through first magnetic gap 15a, thereby make first back chamber 11a and second back chamber 13a realize the state of mutual isolation.

In this embodiment, the first magnetic conductive plate 1571 is provided with a first yielding hole at a position corresponding to the first magnetic gap 15a, and the first yielding hole is a ring-shaped hole, and the first voice coil 112 of the receiving unit 11 can pass through the first yielding hole and be inserted into the first magnetic gap 15a, so that the first voice coil 112 inserted into the first magnetic gap 15a obtains driving support of the multiple magnets, thereby avoiding the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving with a single magnet, and improving the acoustic performance of the receiving unit 11.

Similarly, the second magnetic conductive plate 1573 is provided with a second yielding hole at a position corresponding to the second magnetic gap 15b, and the second yielding hole is an annular hole, and the second voice coil 133 of the speaker unit 13 can pass through the second yielding hole and be inserted into the second magnetic gap 15b, so that the second voice coil 133 inserted into the second magnetic gap 15b obtains the driving support of the multiple magnets, thereby avoiding the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by the driving of a single magnet, and improving the acoustic performance of the speaker unit 13.

It should be noted that, in the design of this embodiment, an inner magnetic conductive plate is disposed on one side of the inner magnet 151 close to the first diaphragm 111, and an outer magnetic conductive plate is disposed on one sides of the middle magnet 153 and the outer magnet 155 close to the first diaphragm 111, the outer magnetic conductive plate covers the middle magnet 153 and the outer magnet 155, the outer magnetic conductive plate is disposed around the outer side of the inner magnetic conductive plate, a first passing hole is formed between an inner edge of the outer magnetic conductive plate and an outer edge of the inner magnetic conductive plate, and the outer magnetic conductive plate and the inner magnetic conductive plate together form a first magnetic conductive plate 1571.

Similarly, a central magnetic conductive plate is arranged on one side of the inner magnet 151 and the middle magnet 153 close to the second diaphragm 131, an edge magnetic conductive plate is arranged on one side of the outer magnet 155 close to the second diaphragm 131, the central magnetic conductive plate covers the inner magnet 151 and the middle magnet 153, the edge magnetic conductive plate is enclosed outside the central magnetic conductive plate, a second passing hole is formed between the inner edge of the edge magnetic conductive plate and the outer edge of the central magnetic conductive plate, and the edge magnetic conductive plate and the central magnetic conductive plate jointly form a second magnetic conductive plate 1573.

Further, referring to fig. 1, fig. 2, fig. 4 and fig. 5 in combination, in an embodiment of the sound generating device 10 of the present invention, a first frame 17 is disposed between the first diaphragm 111 and the first magnetic conductive plate 1571, and the first back cavity 11a is formed between the first diaphragm 111, the first frame 17 and the first magnetic conductive plate 1571.

With such an arrangement, the first diaphragm 111 of the receiver unit 11 can be fixed on the first frame 17, and the first voice coil 112 of the receiver unit 11 can be inserted into the first magnetic gap 15a through the first frame 17, so that the first diaphragm 111 can be installed stably through the first frame 17, thereby preventing the sound-generating effect from being affected by the position deviation in the working process.

Further, referring to fig. 1, fig. 2, fig. 4 and fig. 5, in an embodiment of the sound generating device 10 of the present invention, a side surface of the first magnetic conductive plate 1571 near the first diaphragm 111 protrudes outward to form the first frame 17; alternatively, the first frame 17 and the first magnetic conductive plate 1571 are of a split structure; that is, the first frame 17 may be a protruding structure integrally formed on the first magnetic conductive plate 1571 in the direction of the first diaphragm 111, so as to fix the first diaphragm 111; of course, the first frame 17 may be separately disposed, and the first diaphragm 111 may be fixed by the first frame 17 by disposing the first frame 17 between the first diaphragm 111 and the first magnetic conductive plate 1571.

Further, referring to fig. 5, in an embodiment of the sound generating device 10 of the present invention, an installation boss 157a is disposed on a side of the first magnetic conductive plate 1571 close to the first diaphragm 111, the first frame 17 is disposed on the installation boss 157a, and a surface of the first frame 17 away from the first diaphragm 111 abuts against a mesa of the installation boss 157 a.

In this embodiment, the first frame 17 may be substantially annular to surround the first voice coil 112, and correspondingly, the mounting boss 157a may also be substantially annular.

So set up, through setting up first support body 17 on the mesa of installation boss 157a to make first support body 17 keep away from a side surface of first vibrating diaphragm 111 and the mesa looks butt of installation boss 157a, in order to increase the area of contact of first support body 17 and first magnetic conduction board 1571, alright guarantee that first support body 17 installs the stability on first magnetic conduction board 1571.

Further, referring to fig. 4, in an embodiment of the sound generating device 10 of the present invention, the first frame 17 and/or the first magnetic conductive plate 1571 are/is provided with a first through hole 17a communicating the first rear cavity 11a and a space outside the sound generating device 10, and the first through hole 17a is not communicated with the second rear cavity 13 a.

In this embodiment, the first communication hole 17a may be only disposed on the first frame body 17, specifically, a first groove may be disposed on a surface of a side of the first frame body 17 close to the first magnetic conductive plate 1571, and the first communication hole 17a may be formed by enclosing between the side of the first frame body 17 having the first groove and the first magnetic conductive plate 1571; or, the first communicating hole 17a may also be only disposed on the first magnetic conducting plate 1571, specifically, a second groove may be disposed on a surface of one side of the first magnetic conducting plate 1571 close to the first frame 17, and the first communicating hole 17a may be enclosed between the side of the first magnetic conducting plate 1571 having the second groove and the first frame 17; still alternatively, the first communication hole 17a may also be partially disposed on the first frame body 17, and partially disposed on the first magnetic conductive plate 1571, specifically, a third groove may be disposed on a side surface of the first frame body 17 close to the first magnetic conductive plate 1571, a fourth groove is disposed on a side surface of the first magnetic conductive plate 1571 close to the first frame body 17, and the first communication hole 17a is formed by enclosing between a side of the first frame body 17 where the third groove is disposed and a side of the first magnetic conductive plate 1571 where the fourth groove is disposed.

With such an arrangement, the first rear cavity 11a is communicated with the space outside the sound generating device 10 through the first communication hole 17a, so that a sound enhanced space can be provided for the first rear cavity 11a, thereby effectively improving the low frequency of the receiver unit 11, and further improving the sound generating effect of the receiver unit 11.

Further, referring to fig. 5, in an embodiment of the sound generating device 10 of the present invention, the first magnetic conductive plate 1571 is provided with a second communication hole 157b for communicating the second rear cavity 13a with a space outside the sound generating device 10, and the second communication hole 157b is not communicated with the first rear cavity 11 a.

With this arrangement, the second rear cavity 13a communicates with the space other than the sound generating device 10 through the second communication hole 157b, so that a sound enhanced space can be provided for the second rear cavity 13a, thereby effectively enhancing the low frequency of the speaker unit 13, and further enhancing the sound generating effect of the speaker unit 13.

Further, referring to fig. 5, in an embodiment of the sound generating device 10 of the present invention, the first magnetic conductive plate 1571 further has an avoiding opening 157c at a position corresponding to the first magnetic gap 15a, and the two short axis sides opposite to the first magnetic conductive plate 1571 are both provided with the avoiding opening 157c for avoiding the lead of the first voice coil 112 of the receiver unit 11.

With this arrangement, when the first voice coil 112 is inserted into the first magnetic gap 15a, the lead wire of the first voice coil 112 can be avoided through the avoidance opening 157c, so as to avoid the lead wire from affecting the vibration of the first voice coil 112.

Similarly, the second magnetic conductive plate 1573 may be provided with an opening for avoiding the lead at a position corresponding to the second magnetic gap 15b, so as to avoid the lead of the second voice coil 133.

Further, referring to fig. 1, fig. 2, fig. 4 and fig. 5 in combination, in an embodiment of the sound generating device 10 of the present invention, a second frame 19 is disposed between the second diaphragm 131 and the second magnetic conductive plate 1573, and the second back cavity 13a is formed between the second diaphragm 131, the second frame 19 and the second magnetic conductive plate 1573.

So set up, the second vibrating diaphragm 131 of speaker unit 13 can be fixed on the second frame body 19, and the second voice coil 133 of speaker unit can pass through the second frame body 19 and insert in the second magnetic gap 15b, and then the installation stability of the second vibrating diaphragm 131 can be guaranteed through the second frame body 19, so as to avoid the position deviation in the working process and influence the sound-generating effect.

Further, referring to fig. 5, in an embodiment of the sound production device 10 of the present invention, the inner edge of the second frame 19 is provided with a support platform 191, and the outer edge of the second magnetic conductive plate 1573 is provided on the top of the support platform 191.

In this embodiment, the supporting base 191 may be disposed on the inner edge of the second frame 19 on the short axis side, or may be disposed on the inner edge of the second frame 19 on the long axis side, or both the inner edge of the second frame 19 on the short axis side and the inner edge of the second frame 19 on the long axis side may be disposed with the supporting base 191.

With this arrangement, the outer edge of the second magnetic conductive plate 1573 abuts against the table top of the supporting table 191, so that the second magnetic conductive plate 1573 is fixed on the second frame 19, thereby ensuring the installation stability of the second magnetic conductive plate 1573 and further ensuring the installation stability of the magnetic circuit system 15.

Further, referring to fig. 5 in combination, in an embodiment of the sound generating device 10 of the present invention, the outer magnet 155 includes two short magnets and two long magnets, the two short magnets are respectively disposed on two short axis sides opposite to the middle magnet 153, and the two long magnets are respectively disposed on two long axis sides opposite to the middle magnet 153; the short magnet and the adjacent long magnet are arranged at intervals to form a third communication hole 155a, and the second rear cavity 13a is communicated with the space outside the sounding device 10 through the third communication hole 155 a.

In this embodiment, the short magnets 1551 and the long magnets 1553 have the same width, and a third communication hole 155a is formed between the short magnets and the adjacent long magnets, so that four third communication holes 155a can be formed by two short magnets 1551 and two long magnets 1553.

With this arrangement, by forming a third communication hole 155a between the short magnet and the adjacent long magnet, and making the third communication hole 155a communicate with the second rear cavity 13a of the speaker unit 13 and the space outside the sound generating device 10, a sound-enhanced space can be further provided for the second rear cavity 13a, so as to effectively enhance the low frequency of the speaker unit 13, and thus the sound generating effect of the speaker unit 13 can be enhanced.

Referring to fig. 1 and fig. 2, the present invention further provides a sound module 100, where the sound module 100 includes the cavity 31 and the sound device 10, and the specific structure of the sound device 10 refers to the foregoing embodiments. Since the sound module 100 adopts all the technical solutions of all the embodiments, at least all the advantages brought by all the technical solutions of all the embodiments are provided, and no further description is given here. Wherein the expansion cavity 31 is isolated from the first rear cavity 11a and communicated with the second rear cavity 13 a.

In this embodiment, the second rear cavity 13a of the speaker unit 13 can be communicated with the expansion cavity 31 through the second communication hole 157b and the third communication hole 155a mentioned in the above embodiments, so that a sound-enhanced space can be provided to the second rear cavity 13a through the expansion cavity 31, so as to effectively boost the low frequency of the speaker unit 13, and thus the sound-emitting effect of the speaker unit 13 can be promoted.

Further, since sound absorbing materials such as zeolite are usually added to the cavity 31, which can increase the low frequency, and in order to prevent the sound absorbing materials from entering the speaker unit 13 and affecting the vibration of the second voice coil 133 and the second diaphragm 131, a mesh can be covered on through holes (the second communication hole 157b and the third communication hole 155a) communicating the cavity 31 and the second rear cavity 13a, so as to isolate the sound absorbing materials in the cavity 31 by the mesh.

It should be noted that the understanding of the isolation of the first rear chamber 11a from the expansion chamber 31 is explained as follows: the isolation of the first rear cavity 11a from the expansion cavity 31 means that a communication structure directly communicating the first rear cavity 11a with the expansion cavity 31 does not exist in the structure of the sound module 100.

Usually, can set up the pressure release hole (or the pressure-equalizing hole, or the hole that leaks) that is used for the pressure-equalizing on the dilatation chamber 31, the pressure release hole can be with the leading-in external world/terminal of some air current in the dilatation chamber 31, and the air current of first back chamber 11a also can directly lead-in external world/terminal, but the pressure release hole this moment is not the intercommunication structure of first back chamber 11a of intercommunication and dilatation chamber 31, the reason is as follows:

1. the technical problem to be solved by the application is that when two sets of vibration systems are both communicated with the rear cavity, the problem of air flow interference is caused, and the scheme of communicating through the pressure relief hole obviously has no problem of air flow interference, does not belong to the scheme that two sets of vibration systems are both communicated with the rear cavity, but belongs to the scheme that the first rear cavity 11a is isolated from the expansion cavity 31 after the improvement of the application;

2. the back cavity pressure relief holes are used for pressure equalization and are used for realizing micro communication between air pressure in the expansion cavity 31 and external air pressure, and in order not to influence the listening sensitivity, damping mesh cloth needs to be bonded at the pressure equalization holes to provide certain acoustic resistance; in this embodiment, the first through hole 17a of the first frame 17 needs to realize smooth communication between the first rear cavity 11a and the external air flow, and no damping mesh cloth needs to be arranged; it can be seen that the pressure equalizing holes and the first communication holes 17a of the present application function differently from each other.

Further, referring to fig. 1 and fig. 2 in combination, in an embodiment of the sound module 100 of the present invention, the sound module 100 further includes a fixed housing 30, the fixed housing 30 fixes the sound device 10, and the cavity 31 is formed by enclosing between the fixed housing 30 and the sound device 10.

In this embodiment, the receiving unit 11 is provided with a first sound emitting channel, the first sound emitting channel is communicated with an external space of the sound generating module 100, the fixed housing 30 is provided with an avoiding structure for avoiding the first sound emitting channel, so that an outer side wall of the receiving unit 11 and an inner wall of the avoiding structure enclose to form an external channel, the external channel is isolated from an internal space of the fixed housing 30 and is communicated with an external space of the first rear cavity 11a and the sound generating module 100, for example, when the sound generating module 100 of this embodiment is applied to the terminal device 1000, the first rear cavity 11a can be communicated with the installation cavity 301 of the housing 300 in the terminal device 1000 through the external channel, so as to provide a sound enhancing space for the first rear cavity 11a of the receiving unit 11, thereby effectively improving the low frequency intensity.

In addition, the fixed casing 30 is provided with a second sound emitting channel at a position corresponding to the second diaphragm 131, and an outlet of the second sound emitting channel penetrates through a side circumferential surface of the fixed casing 30.

So set up, through fixing sounder 10 in fixed shell 30, alright guarantee sounder 10's installation stability for sound production module 100's wholeness is better, the reliability is higher, still can make to enclose between fixed shell 30 and the sounder 10 and close and be formed with dilatation chamber 31, alright with sound absorbing material fill in dilatation chamber 31, with the low frequency that promotes loudspeaker unit 13.

Referring to fig. 1 in combination, the present invention further provides a terminal device 1000, where the terminal device 1000 includes a housing 300 and the sound module 100 as described above, and the specific structure of the sound module 100 refers to the foregoing embodiments. Since the terminal device 1000 adopts all technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by all the technical solutions of all the foregoing embodiments are achieved, and are not described in detail herein. Wherein, a mounting cavity 301 is formed in the housing 300; the sounding module 100 is arranged in the installation cavity 301, and the installation cavity 301 is isolated from the second rear cavity 13a and communicated with the first rear cavity 11 a.

In this embodiment, the first rear cavity 11a communicates with the installation cavity 301 of the housing 300 in the terminal device 1000 to provide a sound enhancement space for the first rear cavity 11a of the receiver unit 11, so as to effectively improve the low-frequency intensity.

It is understood that the terminal device 1000 may be, but is not limited to, a mobile phone, a tablet computer, a television, a display, a notebook computer, a Digital photo frame, a Personal Digital Assistant (PDA), an e-book reader, an MP3 (motion Picture Experts Group Audio Layer III) player, an MP4 (motion Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a handheld game console, a virtual reality device, an augmented reality device, a desktop speaker, etc.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The sound production device is characterized by comprising a telephone receiving unit and a loudspeaker unit, wherein the loudspeaker unit is arranged back to the telephone receiving unit;

2. The sounder device according to claim 1, wherein said magnetic plates comprise a first magnetic plate and a second magnetic plate, said first magnetic plate and said second magnetic plate being disposed on opposite sides of said inner magnet, said intermediate magnet, and said outer magnet; the second magnetic conduction plate is not provided with an opening at a position corresponding to the first magnetic gap so as to seal the bottom end of the first magnetic gap.

3. The sound production device of claim 2, wherein a first frame is disposed between the first diaphragm and the first magnetic conductive plate, and the first back cavity is formed between the first diaphragm, the first frame, and the first magnetic conductive plate.

4. The sound production device of claim 3, wherein a side surface of the first magnetic conductive plate adjacent to the first diaphragm protrudes outward to form the first frame body; or, the first frame body and the first magnetic conduction plate are of a split structure.

5. The sound production device according to claim 3, wherein a mounting boss is provided on a side of the first magnetic conductive plate close to the first diaphragm, the first frame body is provided on the mounting boss, and a surface of a side of the first frame body away from the first diaphragm abuts against a table-board of the mounting boss.

6. The sounder device according to claim 3, wherein the first frame body and/or the first magnetic conductive plate is provided with a first communication hole communicating the first rear cavity and a space outside the sounder device, and the first communication hole is not communicated with the second rear cavity.

7. A sound-producing device according to claim 3 wherein the first magnetically permeable plate is provided with a second communication aperture communicating between the second rear chamber and a space outside the sound-producing device, the second communication aperture not communicating with the first rear chamber.

8. The sound production device of claim 2, wherein the first magnetic conductive plate is further provided with an avoiding opening at a position corresponding to the first magnetic gap, and the avoiding opening is provided at each of two short shaft sides opposite to the first magnetic conductive plate and is used for avoiding a lead of the first voice coil of the receiver unit.

9. The sound production device of claim 2, wherein a second frame is disposed between the second diaphragm and the second magnetic conductive plate, and the second back cavity is formed between the second diaphragm, the second frame, and the second magnetic conductive plate.

10. The sounder device according to claim 9, wherein a support base is provided on an inner edge of the second housing, and an outer edge of the second magnetic conductive plate is provided on a table surface of the support base.

11. The sounder device according to any one of claims 1 to 10, wherein the outer magnet comprises two short magnets disposed on opposite short axial sides of the middle magnet and two long magnets disposed on opposite long axial sides of the middle magnet; the short magnets and the adjacent long magnets are arranged at intervals to form a third communication hole, and the second rear cavity is communicated with the space outside the sounding device through the third communication hole.

12. A sound emitting module comprising a cavity and a sound emitting device as claimed in any one of claims 1 to 11; the expansion cavity is isolated from the first rear cavity and communicated with the second rear cavity.

13. The sound generating module of claim 12, further comprising a fixed housing, wherein the fixed housing fixes the sound generating device, and the fixed housing and the sound generating device enclose the cavity.

14. A terminal device, comprising:

the sound generating module set according to claim 12 or 13, wherein the sound generating module set is disposed in the mounting cavity, and the mounting cavity is isolated from the second rear cavity and is communicated with the first rear cavity.