Sound production device

Abstract

The invention discloses a sound production device, and relates to the technical field of loudspeakers, the sound production device comprises a device shell and a vibrating diaphragm structure, the vibrating diaphragm structure comprises a plurality of vibrating diaphragms which are arranged on the same side of the device shell, each vibrating diaphragm can be independently driven to produce sound, the plurality of vibrating diaphragms comprise two adjacent vibrating diaphragms which are arranged adjacently, and the two adjacent vibrating diaphragms are arranged on the same side of the device shell. At least one of the two adjacent vibrating diaphragms is annularly arranged, so that the two adjacent vibrating diaphragms can be arranged along the inner and outer directions, the two adjacent vibrating diaphragms are arranged at intervals along the inner and outer directions and are connected through a sealing connecting part, and / or the two adjacent vibrating diaphragms are at least partially overlapped with each other, so that the two adjacent vibrating diaphragms can be arranged along the inner and outer directions. And the sound production device is at least partially sealed on one side of the vibrating diaphragm structure.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a sound-generating device. Background Art

[0002] The conventional structure of the coaxial speakers currently on the market is that the tweeter is placed on the T-iron center column of the woofer, and the tweeter is inside the woofer voice coil. When the bass vibrates and makes a sound, part of the airflow will leak from the gap between the woofer voice coil and the tweeter, and it cannot be sealed. As a result, the low-frequency dive will become worse and the sound will be impure. As a result, conventional coaxial speakers cannot meet the requirements of sealing and waterproofing, and the application scenarios are very limited. Summary of the invention

[0003] The main purpose of the present invention is to propose a sound-generating device, which aims to solve the problems that the traditional coaxial speaker structure has poor low-frequency dive during use, impure sound, difficulty in meeting waterproof requirements, and very limited application scenarios.

[0004] To achieve the above object, the sound-generating device proposed by the present invention comprises:

[0005] a device housing; and

[0006] A diaphragm structure, comprising a plurality of diaphragms disposed on the same side of the device housing, each of the diaphragms being independently driven to produce sound, the plurality of diaphragms comprising two adjacent diaphragms disposed adjacent to each other, at least one of the two adjacent diaphragms being disposed in a ring shape so that the two adjacent diaphragms can be arranged in an inner-outer direction;

[0007] The two adjacent diaphragms are spaced apart inwardly and outwardly and connected by a sealing connection portion, and / or the two adjacent diaphragms are at least partially overlapped with each other, so that the sound-generating device is at least partially sealed on one side of the diaphragm structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0009] Figure 1 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention;

[0010] Figure 2 for Figure 1 A schematic diagram of the vertical cross-section structure of the sound-generating device;

[0011] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0012] Figure 4 for Figure 3 The enlarged structural diagram at B in the middle;

[0013] Figure 5 for Figure 3 A schematic diagram of the structure of the mounting bracket;

[0014] Figure 6 for Figure 3 Schematic diagram of the structure of the first magnetic conductor;

[0015] Figure 7 for Figure 3 Schematic diagram of the structure of the middle basin frame;

[0016] Figure 8 for Figure 3 Schematic diagram of the magnetic path simulation of the first magnetic conductor.

[0017] Description of Figure Numbers:

[0018] 100. Sounding device; 1. Diaphragm structure; 11. First diaphragm; 12. Second diaphragm; 13. Third diaphragm; 2. Voice coil structure; 21. First voice coil; 211. First lead wire; 22. Second voice coil; 221. Second lead wire; 23. Third voice coil; 3. Annular sealing body; 31. Annular mounting groove; 4. First magnetic conductor; 41. Disc; 42. Central column; 421. Accommodating groove; 422. Through hole Provide a hole; 51, a first annular magnet; 52, a first washer; 521, a convex portion; 53, a second magnet; 54, a second washer; 55, a third magnet; 56, a third washer; 6, a mounting bracket; 61, a receiving groove; 62, a groove structure; 63, a second terminal; 7, a basin frame; 71, a mounting hole; 72, a first terminal; 73, a main connecting line; 81, a first elastic wave; 82, a second elastic wave; 9, a U iron piece.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the sound of the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "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 technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The conventional structure of the coaxial speakers currently on the market is that the tweeter is placed on the T-iron center column of the woofer, and the tweeter is inside the woofer voice coil. When the bass vibrates and makes a sound, part of the airflow will leak from the gap between the woofer voice coil and the tweeter, and it cannot be sealed. As a result, the low-frequency dive will become worse and the sound will be impure. As a result, conventional coaxial speakers cannot meet the requirements of sealing and waterproofing, and the application scenarios are very limited.

[0024] The present invention proposes a sound generating device 100 for solving the above problems.

[0025] See also Figures 1 to 8In one embodiment of the present invention, the sound-emitting device 100 has better sealing properties than the traditional coaxial speaker, and can effectively prevent the airflow from leaking from the gap between the tweeter structure and the woofer structure, so that the entire speaker has purer bass and treble sound quality, and at the same time has better sealing properties, and can be used in audio products such as Smart, BT, Home, Partybox, SB, HIFI, etc., whether indoors or outdoors, rainy days or swimming pools, it can take into account the surrounding environment, so that the restrictions on application scenarios are greatly reduced. Specifically, the multiple diaphragms in this embodiment are all arranged on the same side of the device housing. Among them, each diaphragm is connected to the corresponding voice coil structure 2, and when used specifically, it can be driven by the corresponding voice coil structure 2, so as to make independent sounds respectively. It should be noted that the plurality of diaphragms include at least two adjacent diaphragms, at least one of which is arranged in a ring shape, so that the two adjacent diaphragms can be arranged in the inner and outer directions, and the two adjacent diaphragms are arranged in an inner and outer spaced relationship, and connected by a sealing connection part, so that the spaced area between the two diaphragms is sealed and connected, so as to form a closed diaphragm surface on the same side of the device housing, so as to achieve the sealing of the sound-emitting end of the speaker. Alternatively, the two adjacent diaphragms are at least partially overlapped with each other, so that the sound-emitting device 100 is at least partially sealed on one side of the diaphragm structure 1. In this way, the sealing of the end structure of the sound-emitting device 100 is achieved, and the two diaphragms are driven by independent sound-emitting structures, and a relatively separated isolation state is achieved between the two. In the actual working process, there will be no air leakage between the sound-emitting structures arranged inside and outside, thereby ensuring the sound quality of the corresponding diaphragm. In addition, one end of the sound-emitting device 100 is sealed by the above diaphragm structure 1, which has good waterproof performance, can effectively solve the limitations of traditional speakers during use, and has good prospects for use.

[0026] Specifically, the sound-generating device 100 is configured as a three-voice coil structure 2, and its diaphragm is also configured as a corresponding three-diaphragm structure 1, which includes a first diaphragm 11, a second diaphragm 12, and a third diaphragm 13 arranged sequentially from the outside to the inside. Among them, for the diaphragm structure 1, the first diaphragm 11 and the second diaphragm 12 are arranged in a ring shape. During the specific installation process, the first diaphragm 11 and the second diaphragm 12 are connected by the sealing connection part, and the second diaphragm 12 and the third diaphragm 13 are at least partially overlapped with each other. In this way, the three diaphragm structures 1 from the inside to the outside are sealed and connected, thereby achieving the sealing of the sound-generating end of the sound-generating device 100. The traditional speaker structure generally includes two voice coil structures 2. For the sake of structural compactness, the tweeter voice coil structure 2 will be installed inside the bass voice coil structure 2. However, because the tweeter diaphragm structure 1 and the bass diaphragm structure 1 need to perform independent sound control, in order not to affect their respective sound frequencies, the structures of the sound-emitting ends of the two are often relatively independently arranged, so the corresponding covering structure cannot generally be arranged between the two. This results in a certain gap between the inner tweeter diaphragm and the outer bass diaphragm, making it impossible to achieve sealing of the sound-emitting end. When the sound is actually emitted, the internal treble airflow will leak from the gap between the bass voice coil and the treble, resulting in a poor dive of the low frequency and an impure sound. In addition, due to the existence of the above-mentioned installation gap, it is also difficult to achieve a good sound effect when used in a humid environment. In the sound-emitting device 100 in this embodiment, the three diaphragms can be driven independently, and cooperate with each other to achieve a sealed installation of the sound-emitting end, which can effectively solve the above problems.

[0027] The three-voice coil structure 2 is set as a coaxial three-voice coil structure 2, which can achieve compact miniaturization in the overall structure. Among them, the three-voice coil structure 2 is installed on the same magnetic conductor structure, that is, the first magnetic conductor 4, and the first magnetic conductor 4 structure includes a disk 41 and a central column 42. The central column 42 is provided with a receiving groove 421 on an upward end. The three-voice coil structure 2 specifically includes a first voice coil 21, a second voice coil 22 and a third voice coil 23, and the first voice coil 21, the second voice coil 22 and the third voice coil 23 are arranged from the outside to the inside in sequence, and correspond to the bass voice coil, the middle voice coil and the treble voice coil in sequence. Among them, the first voice coil 21, the second voice coil 22 and the third voice coil 23 are all coaxially installed corresponding to the axis of the central column 42. In this embodiment, the three-voice coil coaxial structure is set, which can relatively separate the low, middle and high tones, and can achieve a higher sound frequency coverage range in a limited space, and can also design and adjust the frequency range of high, middle and bass sound according to actual requirements. For example, in the actual application process, the sound-emitting device 100 may have a variety of different usage scenarios. In some scenarios, a higher, louder and more penetrating treble may be required, and in some usage scenarios, the bass may need to sink to perform better. At this time, the independently set voice coil structure 2 has the advantage of being able to be independently designed according to actual requirements. For example, when the bass needs to sink sufficiently, the first voice coil 21 structure can be set relatively large accordingly, so that the bass can have a lower sound frequency. Through the setting of the above structure, the above-mentioned three voice coil structures 2 are coaxial, which can effectively improve the sound frequency coverage range of the sound-emitting device 100, for example, achieving full frequency 20Hz-40000Hz, point sound source sounding body, and achieving high-quality sound reproduction.

[0028] In the process of arranging the actual voice coil structure 2, in order to achieve better synchronization between the bass voice coil and the midrange voice coil, thereby improving the efficiency of sound generation. In the specific arrangement process, the partial structures of the first voice coil 21 (bass voice coil) and the second voice coil 22 (midrange voice coil) are connected as a whole, so that when one of the first voice coil 21 and the second voice coil 22 vibrates, the other voice coil structure 2 can be synchronously driven to vibrate, so that the midrange sound generation structure and the bass sound generation structure have better synchronization. Specifically, in this embodiment, the first voice coil 21 and the second voice coil 22 are structurally arranged adjacent to each other, and the upward ends of the two adjacent voice coils are both protruding from the upper end surface of the central column 42, and the upward ends of the first voice coil 21 and the second voice coil 22 are arranged in a relatively flush state, and then an annular sealing body 3 is provided between the upward ends of the first voice coil 21 and the second voice coil 22, so as to transmit the vibrations of the first voice coil 21 and the second voice coil 22 through the annular sealing body 3. Specifically, one annular end of the annular sealing body 3 is an open structure, and an annular mounting groove 31 is formed at one end thereof facing the voice coil structure 2. The upward ends of the first voice coil 21 and the second voice coil 22 are both connected to the annular mounting groove 31. The annular sealing body 3 can seal the gap between the upward ends of the two voice coil structures 2, and realize the connection of the upper ends of the two voice coil structures 2. In addition, the first diaphragm 11 and the second diaphragm 12 are both annular diaphragm structures 1, and the inner hole side of the first diaphragm 11 is connected to the outer wall of the upward end of the first voice coil 21. The second diaphragm 12 is arranged in the second voice coil 22 structure 2, and its outer ring is connected to the inner wall of the upward end of the second voice coil 22. In the actual sound-generating process, when the outer bass voice coil vibrates, the midrange voice coil inside it will be driven to vibrate through the annular sealing body. Conversely, when the midrange voice coil vibrates, the outer bass voice coil can also be driven to vibrate synchronously through the annular sealing body 3. In the actual process, the synchronous vibration of the bass and the midrange can be achieved, which effectively improves the synchronization of the bass and the midrange, and the sound-generating efficiency of the entire sound-generating structure will be better.

[0029] The disk body 41 and the center column 42 are integrally formed metal structures. The first voice coil 21 is sleeved on the outer peripheral side of the column structure, and a bass vibration gap is formed between the first voice coil 21 and the outer wall of the column structure. The second voice coil 22 is arranged in the receiving groove 421, and a mid-range vibration gap is formed between the second voice coil 22 and the inner wall of the receiving groove 421. The first magnetic conductor 4 forms a magnetic path at the position of the first voice coil 21 and the second voice coil 22. The first magnetic circuit formed by the first voice coil 21 includes a first annular magnet 51 and a first washer 52. The first annular magnet 51 is arranged on the outer periphery of the central column 42 and mounted on the end surface of the disk 41. The first washer 52 is mounted on the end surface of the first annular magnet 51 for magnetic conduction. The inner hole of the first washer 52 is arranged corresponding to the first voice coil 21 to form a first magnetic circuit consisting of the first annular magnet 51-the first washer 52-the first voice coil 21-the central column 42-the disk 41-the first annular magnet 51. The second magnetic circuit formed by the second voice coil 22 includes a second magnet 53 and a second washer 54. Specifically, the second magnet 53 is arranged in the receiving groove 421, the second washer 54 is arranged on the second magnet 53, and the outer ring wall of the second washer 54 is arranged corresponding to the second voice coil 22 to form a second magnetic circuit consisting of the second magnet 53-the second washer 54-the second voice coil 22-the wall of the receiving groove 421-the second magnet 53. Both magnetic circuit structures are arranged on the first magnetic conductor 4, and the first magnetic conductor 4 is an integrated structure, which has better integrity than the traditional speaker structure, and can form a larger space in the device housing for installing the bass voice coil structure 2 and the treble voice coil structure 2. In the traditional speaker structure, the treble structure and the bass structure are installed with relatively independent T iron and U iron structures, respectively, which is particularly inconvenient when installing and matching. In this embodiment, the integrated first magnetic conductor 4 is not only more streamlined in structure, which helps the compactness of the entire sound-generating structure, but also directly omits the installation and matching operations of the T iron structure and the U iron structure during installation, which is more convenient in the specific operation process. In addition, from the perspective of the overall structure, the first magnetic conductor structure includes an inner cavity for installing the second voice coil 22, and an outer part for installing the first voice coil 21 structure, and its corresponding diaphragm structure 1 is correspondingly installed at its upper end position, combined with the annular sealing body 3 structure, the inner cavity is relatively isolated from the outer part, thereby correspondingly achieving the sealing effect of the above-mentioned sound-generating end.The corresponding tweeter voice coil structure 2 is arranged in the inner cavity, and the bass voice coil structure 2 is arranged in the outer part. The inner and outer structures are relatively isolated by the corresponding voice coil structure 2 and the diaphragm structure 1. Therefore, when the internal treble vibrates, the internal airflow cannot leak directly to the outside, which fully ensures the sound quality of the inner and outer sound-generating structures during the sound-generating process.

[0030] After the integrated first magnetic conductor 4 is adopted, a closed-loop magnetic circuit with high magnetic flux is formed between the first magnetic circuit (bass magnetic circuit) and the second magnetic circuit (midrange magnetic circuit). Figure 8 Therefore, the first voice coil 21 and the second voice coil 22 can be subjected to a greater force in the magnetic field, thereby improving the sensitivity and power handling capacity of the sound-generating device 100 and having a good promoting effect on improving the sound quality.

[0031] The tweeter voice coil is arranged inside the midrange voice coil structure 2, and the tweeter voice coil is arranged relatively small, which conforms to the actual structural characteristics. Specifically, in order to install the tweeter voice coil structure 2, a corresponding mounting bracket 6 is arranged at one end of the central column 42 structure for mounting the tweeter voice coil structure 2, and a third magnetic circuit is formed at one end of the tweeter voice coil to drive the third diaphragm 13 to vibrate and produce sound. The second magnet 53 and the second washer 54 are both arranged as annular structural members, and the inner diameter of the second magnet 53 is smaller than the inner diameter of the second washer 54, so after the second magnet 53 and the second washer 54 are stacked and installed, a corresponding stepped mounting portion is formed at the inner ring of the second magnet 53 and the inner ring of the second washer 54, and a stepped portion is formed on the downward end of the mounting bracket 6, and the stepped portion is just mounted on the inner hole end surface of the second magnet 53, so that the mounting bracket 6 is installed along the axis of the central column 42. A receiving groove 61 is formed on the upper end of the mounting bracket 6, and a U-iron piece is arranged in the receiving groove 61. The third magnet 55 and the third washer 56 in the tweeter structure are stacked in the U-iron piece in sequence. The third diaphragm 13 (tweeter diaphragm) is installed at the notch of the receiving groove 61. A circle of downward protrusions is arranged on the tweeter diaphragm, and one end of the third voice coil 23 (tweeter voice coil) is installed on the protrusion. The outer wall of the third washer 56 corresponds to the third voice coil 23, so that a third magnetic circuit is formed in the receiving groove 61. The third magnetic circuit includes the following path: from the third magnet 55-the third washer 56-the third voice coil 23-the U-iron piece-the third magnet 55. A tweeter voice coil vibration gap is formed between the U-iron piece and the third voice coil 23.

[0032] The inner hole of the second diaphragm 12 is overlapped on the outer ring part of the third diaphragm 13, and the two are fixedly connected by bonding, and the three diaphragm structures 1 and the annular sealing body together form a sealing structure of the sound-emitting end. For the installation of the second voice coil 22, a second spring 82 is provided on the mounting bracket 6, and the second voice coil 22 is installed on the outer peripheral wall of the second spring 82. The second voice coil 22 is installed by the second spring 82, so that the vibration gap of the mid-range voice coil can be formed between the second voice coil 22 and the inner wall of the accommodating groove 421. For the installation of the first voice coil 21, a basin frame 7 is provided on the upper end surface of the first washer 52, and the basin frame 7 is equivalent to the above-mentioned device shell. When the basin frame 7 is installed, the multiple mounting holes 71 on the basin frame 7 need to be installed corresponding to the multiple protrusions 521 on the first washer 52, and a first elastic wave 81 is installed on the inner side of the basin frame 7. The first voice coil 21 is installed in the inner hole of the first elastic wave 81, and the two are fixedly connected by coating glue, and the outer ring of the first diaphragm 11 is installed at the opening position of the upper end of the basin frame 7.

[0033] By setting the above structure, a treble, midrange and bass structure arranged from the inside to the outside can be formed. When assembling it specifically, each structure can be installed according to the following steps. First, the first diaphragm 11 and the first voice coil 21 are installed. After the first diaphragm 11 and the first voice coil 21 are installed, the third voice coil 23 structure, the mounting bracket 6 and the second magnetic circuit part inside are assembled. Finally, the second elastic wave 82, the second diaphragm 12 and the second voice coil 22 and other structures are installed, so that the entire sound-generating device 100 is assembled in sequence to form a complete sound-generating structure.

[0034] The voice coil structure 2 is provided with a corresponding connection and conduction structure, and the connection and conduction structure is used for debugging connection or connecting an external corresponding power amplifier device. As for the second voice coil 22, a second lead wire 221 is connected to the second voice coil 22. Figure 3As shown, the second lead wire 221 is led out from the contact gap between the inner side of the second voice coil 22 and the second diaphragm 12 by means of inner winding. In order to ensure the sealing between the second voice coil 22 and the second diaphragm 12, the connection between the second voice coil 22 and the second diaphragm 12 is usually treated by coating glue. The first lead wire 211 of the first voice coil 21 is led out from the outside of the first voice coil 21, and extends from the connection between the first voice coil 21 and the first diaphragm 11 to the top of the first diaphragm 11. As mentioned above, in order to ensure the sealing between the second voice coil 22 and the first diaphragm 11, the connection gap can also be treated by coating glue at the connection between the first voice coil 21 and the first diaphragm 11. A first terminal 72 is provided on the basin frame 7, and a main connecting line 73 on the first terminal 72 is provided above the first diaphragm 11. One end of the first lead wire 211 and one end of the second lead wire 221 are both connected to the main connecting line 73. As mentioned above, the upward ends of the first voice coil 21 and the second voice coil 22 are connected through the sealed connector, so in terms of specific structure, the first voice coil 21 and the second voice coil 22 realize a parallel conductive connection state. Such arrangement, in addition to being able to allow the first voice coil 21 and the second voice coil 22 to achieve synchronous vibration, thereby ensuring the synchronization of mid-bass sound and improving the sound efficiency as mentioned above, can also allow the first voice coil 21 and the second voice coil 22 to achieve mutual replacement operation under certain circumstances. For example, when one of the first voice coil 21 and the second voice coil 22 is damaged, the relevant structure in this embodiment is adopted, and the entire sound structure only loses part of the sound frequency. At this time, the other intact voice coil structure 2 can still vibrate and sound in combination with its corresponding diaphragm structure 1. In this way, the relevant structure in this embodiment is not like the traditional speaker structure. When the bass voice coil is damaged, the mid-bass of the entire speaker structure is completely lost or the noise is serious, so that the entire speaker structure must be replaced.

[0035] The third connecting lead of the third voice coil 23 is separately provided. Specifically, the middle position of the first magnetic conductor 4 is hollowed to form a through hole 422, and the downward end of the mounting bracket 6 is installed in the through hole 422. A second terminal 63 is provided on the downward end of the mounting bracket 6, and one end of the third connecting lead (not shown in the figure) on the third voice coil 23 is connected to the second connecting terminal to achieve electrical conduction. In order to fix the third connecting lead, the regularity of the third connecting lead on the mounting bracket 6 is ensured. In this embodiment, a sunken groove structure 62 is provided on the outer wall of the mounting bracket 6. During the actual installation process, the wire body structure of the third connecting lead is installed on the inner side of the groove structure 62, so that the sunken fixed installation of the third connecting lead is achieved through the groove structure 62. In this way, the third connecting lead can not only be well fixed, but also will not cause installation interference with the inner ring of the second damper 82, the second magnet 53 and the second washer 54. The outer mounting surface of the mounting bracket 6 can be made smoother, which is more conducive to the installation of various structures and helps to improve the stability of the internal structure. It can be imagined that in addition to the above-mentioned groove structure 62 for installing the third connecting wire, the third connecting wire can also be integrated inside the mounting bracket 6 to achieve the above technical effect of facilitating installation.

[0036] After the structure of the sound-generating device 100 meets the assembly requirements, it is also necessary to connect corresponding debugging equipment to debug its overall power and EQ frequency response. The first lead wire 211 of the first voice coil 21 and the second lead wire 221 of the second voice coil 22 are both connected to the first terminal 72. During testing, the first terminal 72 and the second terminal 63 are both connected to the debugging equipment for debugging. In this solution, although a plurality of the voice coil structures 2 are provided, since the first voice coil 21 and the second voice coil 22 are connected in parallel, the two can share one first terminal 72 to connect to an external device. In the actual test process, the corresponding connection and wiring operations are simplified, making the entire test process more convenient.

[0037] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: include: Device housing; as well as, A diaphragm structure, comprising a plurality of diaphragms disposed on the same side of the device housing, each of the diaphragms being independently driven to produce sound, the plurality of diaphragms comprising two adjacent diaphragms disposed adjacent to each other, at least one of the two adjacent diaphragms being disposed in a ring shape so that the two adjacent diaphragms can be arranged in an inner-outer direction; The two adjacent diaphragms are spaced apart inwardly and outwardly and connected by a sealing connection portion, and / or the two adjacent diaphragms are at least partially overlapped with each other, so that the sound-generating device is at least partially sealed on one side of the diaphragm structure.

2. The sound-generating device according to claim 1, characterized in that: The plurality of diaphragms include a first diaphragm, a second diaphragm and a third diaphragm arranged in sequence from outside to inside, and the first diaphragm and the second diaphragm are arranged in a ring shape; The first diaphragm and the second diaphragm are connected via the sealing connection portion, and the second diaphragm and the third diaphragm are at least partially overlapped with each other.

3. The sound-generating device according to claim 2, characterized in that: The sound-generating device further includes a voice coil structure, the voice coil structure including a first voice coil, a second voice coil and a third voice coil, the first voice coil correspondingly drives the first diaphragm to vibrate and generate sound, the second voice coil correspondingly drives the second diaphragm to vibrate and generate sound, and the third voice coil correspondingly drives the third diaphragm to vibrate and generate sound; The first voice coil, the second voice coil and the third voice coil are coaxially arranged.

4. The sound generating device according to claim 1, characterized in that: The sound-generating device further comprises: The voice coil structure comprises two adjacent voice coils, each of the adjacent voice coils drives the corresponding adjacent diaphragm to vibrate and produce sound; and An annular sealing body, having an annular mounting groove formed at one end facing the voice coil structure, wherein the two adjacent voice coils are connected to the annular mounting groove; The sealed connection portion includes the annular sealing body.

5. The sound generating device according to claim 4, characterized in that: The two adjacent diaphragms include a first diaphragm located on the outside and a second diaphragm located on the inside; The two adjacent voice coils include a first voice coil and a second voice coil, the first voice coil correspondingly drives the first diaphragm to vibrate and produce sound, and the second voice coil correspondingly drives the second diaphragm to vibrate and produce sound; The first voice coil is connected to the outer groove side wall of the annular mounting groove, and the second voice coil is connected to the inner groove side wall of the annular mounting groove.

6. The sound generating device according to claim 1, characterized in that: The sound generating device further comprises a magnetic circuit structure, on which a first magnetic circuit and a second magnetic circuit are formed; The two adjacent diaphragms include a first diaphragm located on the outside and a second diaphragm located on the inside; The sound-generating device further comprises two adjacent voice coils, the two adjacent voice coils comprising a first voice coil and a second voice coil, the first voice coil is located on the first magnetic circuit, and the second voice coil is located on the second magnetic circuit; The magnetic circuit structure includes a first magnetic conductor, wherein a portion of the first magnetic conductor is located on the first magnetic circuit and a portion of the first magnetic conductor is located on the second magnetic circuit.

7. The sound generating device according to claim 6, characterized in that: The first magnetic conductor comprises: The disc; and A central column extends from the middle of the disk body, an accommodating groove is provided on the end surface of the central column facing away from the disk body, and the second diaphragm cover is arranged at the notch of the accommodating groove; The first voice coil is disposed on the outer side of the central column, and the second voice coil is at least partially disposed in the receiving groove; The disk is located on the first magnetic circuit, and the central column is located on the first magnetic circuit and the second magnetic circuit.

8. The sound generating device according to claim 7, characterized in that: The magnetic circuit structure further includes a first annular magnet disposed on the disk body, and a first washer disposed on the first annular magnet, wherein the first annular magnet and the first washer are both located on the first magnetic circuit; and / or, The magnetic circuit structure further includes a second magnet disposed in the accommodating groove and a second washer disposed on the second magnet. The second magnet and the second washer are both located on the second magnetic circuit.

9. The sound generating device according to claim 6, characterized in that: A third magnetic circuit is formed on the magnetic circuit structure, and the plurality of diaphragms further include a third diaphragm located within the second diaphragm; The sound-generating device further includes a third voice coil, a third magnet and a third washer, and the third voice coil, the third magnet and the third washer are all located in the third magnetic circuit.

10. The sound generating device according to claim 9, characterized in that: The sound-generating device further comprises a mounting bracket, one end of which is connected to the first magnetic conductor, a receiving groove is formed at the other end of the mounting bracket, and the third diaphragm cover is arranged at the notch of the receiving groove; The third magnet and the third washer are both disposed in the receiving groove; The third voice coil is at least partially disposed in the accommodating groove.

11. The sound generating device according to claim 10, characterized in that: The middle part of the first magnetic conductor is hollow to form a through hole; The sound-generating device further comprises a third lead wire electrically connected to the third voice coil, and the third lead wire is electrically connected to a second terminal at least partially disposed in the penetration hole.

12. The sound generating device according to claim 1, characterized in that: The two adjacent diaphragms include a first diaphragm located on the outside and a second diaphragm located on the inside; The two adjacent voice coils include a first voice coil and a second voice coil, the first voice coil correspondingly drives the first diaphragm to vibrate and produce sound, and the second voice coil correspondingly drives the second diaphragm to vibrate and produce sound; The first voice coil and the second voice coil are arranged in parallel.

13. The sound generating device according to claim 12, characterized in that: The first voice coil is electrically connected to a first lead wire, and the second voice coil is electrically connected to a second lead wire; The sound-generating device further comprises a main connecting wire, one end of which is electrically connected to a first connecting terminal arranged in the device housing, and the other end of which is electrically connected to both the first connecting wire and the second connecting wire.

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