Sound unit and speaker

Abstract

The present application relates to a sound unit and a loudspeaker, wherein the sound unit includes: a basin frame having an accommodating space; a magnetic circuit system, the magnetic circuit system is arranged in the accommodating space, and the magnetic circuit system forms a magnetic gap; a vibration system, the vibration system includes a first diaphragm and a second diaphragm fixed on opposite sides of the basin frame, a first voice coil assembly inserted into the magnetic gap to drive the first diaphragm to vibrate and produce sound, and a second voice coil assembly inserted into the magnetic gap to drive the second diaphragm to vibrate and produce sound; an end cover, the end cover is fixed on a side of the basin frame where the first diaphragm or the second diaphragm is provided; the first diaphragm has a first through hole, the second diaphragm has a second through hole, the first voice coil assembly has a first channel, the second voice coil assembly has a second channel, the magnetic circuit system has a third channel, the first through hole, the first channel, the third channel, the second channel, and the second through hole are connected in sequence; it can not only offset the vibration of the sound unit or the loudspeaker, but also realize the same-phase superposition of sound waves, thereby enhancing the sound quality effect of the loudspeaker.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic conversion, and in particular to a sound-emitting unit and a loudspeaker. Background Art

[0002] As a key component of loudspeakers with audio playback capabilities, sound drivers are widely used. They typically consist of a vibration system and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil, and a voice coil bobbin, with the diaphragm and / or voice coil mounted to the bobbin. The magnetic circuit system forms a magnetic gap, into which the voice coil extends. This magnetic circuit drives the diaphragm to vibrate, producing sound.

[0003] To adapt to the trend toward miniaturization and thinness in speakers, the sound drivers used in them must not only be compact but also deliver high sound quality. Existing sound drivers typically utilize a single diaphragm that generates sound from the front. As the voice coil, driven by the magnetic circuit system, drives the diaphragm to vibrate, the voice coil bobbin and other components within the driver also vibrate, affecting the driver's acoustic performance and structural stability, ultimately impacting the speaker's performance. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present application provides a sound unit and a loudspeaker, which are beneficial to improving the acoustic performance and structural stability of the sound unit.

[0005] In the first aspect, an embodiment of the present application provides a sound-emitting unit, comprising: a basin frame having an accommodating space; a magnetic circuit system, the magnetic circuit system is arranged in the accommodating space, and the magnetic circuit system forms a magnetic gap; a vibration system, the vibration system includes a first diaphragm and a second diaphragm fixed on opposite sides of the basin frame, a first voice coil assembly inserted into the magnetic gap to drive the first diaphragm to vibrate and produce sound, and a second voice coil assembly inserted into the magnetic gap to drive the second diaphragm to vibrate and produce sound; an end cover, the end cover is fixed on a side of the basin frame where the first diaphragm or the second diaphragm is provided; the first diaphragm has a first through hole, the second diaphragm has a second through hole, the first voice coil assembly has a first channel extending along the vibration direction of the first diaphragm or the second diaphragm, the second voice coil assembly has a second channel extending along the vibration direction, the magnetic circuit system has a third channel extending along the vibration direction, and the first through hole, the first channel, the third channel, the second channel, and the second through hole are connected in sequence.

[0006] In combination with the first aspect, in a feasible embodiment, the magnetic circuit system includes a main magnet and a secondary magnet arranged around the outer circumference of the main magnet, and the main magnet and the secondary magnet are spaced apart to form a magnetic gap; the third channel is arranged along the vibration direction through the main magnet.

[0007] In combination with the first aspect, in a feasible embodiment, the magnetic circuit system also includes a first main pole core and a second main pole core fixed on opposite sides of the main magnetic steel along the vibration direction, and a first secondary pole core and a second secondary pole core fixed on opposite sides of the secondary magnetic steel along the vibration direction, and the first secondary pole core is arranged around the outer periphery of the first main pole core, and the second secondary pole core is arranged around the outer periphery of the first main pole core; the first main pole core is provided with a third through hole for connecting the first channel and the third channel along the vibration direction, and the second main pole core is provided with a fourth through hole for connecting the second channel and the third channel along the vibration direction.

[0008] In combination with the first aspect, in a feasible embodiment, the first voice coil assembly includes a first voice coil bobbin fixed between the first diaphragm and the first main pole core, and a first voice coil arranged around the outer circumference of the first voice coil bobbin, and the first channel is arranged to penetrate the first voice coil bobbin along the vibration direction; the second voice coil assembly includes a second voice coil bobbin fixed between the second diaphragm and the second main pole core, and a second voice coil arranged around the outer circumference of the second voice coil bobbin, and the second channel is arranged to penetrate the second voice coil bobbin along the vibration direction; at least a portion of the first voice coil and at least a portion of the second voice coil are inserted into the magnetic gap.

[0009] In combination with the first aspect, in a feasible embodiment, the magnetic circuit system also includes a mounting frame, the mounting frame includes a mounting frame body and a supporting portion, wherein the mounting frame body has a receiving cavity, the main magnet is arranged in the receiving cavity, and the receiving cavity has a first opening and a second opening arranged opposite to each other; the first opening faces the first diaphragm, the second opening faces the second diaphragm, and the inner diameter of the first opening is smaller than the outer diameter of the main magnet, and the inner diameter of the second opening is larger than the outer diameter of the main magnet; the supporting portion extends from the second opening along the radial direction of the mounting frame body, and the supporting portion is fixedly connected to the side of the secondary magnet facing the second diaphragm.

[0010] In combination with the first aspect, in a feasible embodiment, the vibration system further includes a first elastic wave and a second elastic wave spaced apart along the vibration direction, wherein the first elastic wave is connected between the first voice coil and the basin frame, and the second elastic wave is connected between the second voice coil and the basin frame.

[0011] In combination with the first aspect, in a feasible embodiment, the first diaphragm includes a first diaphragm, a first fold ring and a second fold ring, and the first through hole is opened in the first diaphragm, wherein the first fold ring is connected between the outer edge of the first diaphragm and the basin frame, and the second fold ring is connected between the inner edge of the first diaphragm and the first voice coil frame; and / or, the second diaphragm includes a second diaphragm, a third fold ring and a fourth fold ring, and the second through hole is opened in the second diaphragm, wherein the third fold ring is connected between the outer edge of the second diaphragm and the basin frame, and the fourth fold ring is connected between the inner edge of the second diaphragm and the second voice coil frame.

[0012] In combination with the first aspect, in a feasible embodiment, the basin frame includes a first shell for fixing the first diaphragm and a second shell for fixing the second diaphragm, and the first shell is stacked on the second shell along the vibration direction; a support part is provided in the first shell or the second shell, and the magnetic circuit system is fixed to the support part.

[0013] In combination with the first aspect, in a feasible embodiment, the side wall of the first shell and / or the side wall of the second shell is provided with at least one mounting portion, and the mounting portion is connected to the external shell.

[0014] In a second aspect, an embodiment of the present application provides a speaker comprising a sound-emitting unit as described above.

[0015] Compared with the existing technology, this technical solution has at least the following technical effects:

[0016] In a sound unit and a loudspeaker provided in an embodiment of the present application, the sound unit includes a first diaphragm and a second diaphragm fixed on opposite sides of a basin frame. Under the action of the magnetic circuit system, the direction in which the first diaphragm is driven to vibrate by the first voice coil assembly is opposite to the direction in which the second diaphragm is driven to vibrate by the second voice coil assembly, and the driving force provided by the magnetic circuit system is the same, which can offset the vibration of the entire sound unit or loudspeaker caused by the vibration of the first diaphragm and / or the second diaphragm, thereby achieving vibration reduction, improving the acoustic performance and structural stability of the sound unit, and thereby ensuring the working performance of the loudspeaker.

[0017] In addition, since the end cover is fixed to the side of the basin frame where the first diaphragm or the second diaphragm is provided, the first diaphragm has a first through hole, the second diaphragm has a second through hole, the first voice coil assembly has a first channel, the second voice coil assembly has a second channel, the magnetic circuit system has a third channel, and the first through hole, the first channel, the third channel, the second channel and the second through hole are connected in sequence to form a sound guide channel, the sound waves emitted by the vibration of the first diaphragm in the air can flow through the sound guide channel to the side where the second diaphragm is located, or the sound waves emitted by the vibration of the second diaphragm in the air can flow through the sound guide channel to the side where the first diaphragm is located, so that the sound waves emitted by the vibration of the first diaphragm in the air and the sound waves emitted by the vibration of the second diaphragm in the air are superimposed in the same phase, thereby enhancing the sound quality of the speaker.

[0018] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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 these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the decomposed structure of the sound unit provided in an embodiment of the present application.

[0021] Figure 2 This is a schematic diagram of the structure of the sound unit provided in an embodiment of the present application.

[0022] Figure 3 for Figure 2 The cross-sectional view of the sound unit along line AA is shown.

[0023] Figure 4 for Figure 3 The enlarged schematic diagram of the local structure of the sound-producing unit at A is shown.

[0024] Figure 5 for Figure 3 The enlarged schematic diagram of the local structure of the sound unit at B is shown.

[0025] Figure 6 for Figure 1 Schematic diagram of the exploded structure of the first diaphragm shown.

[0026] Figure 7 for Figure 1 Schematic diagram of the exploded structure of the second diaphragm shown.

[0027] Figure 8 for Figure 1 Schematic diagram of the decomposed structure of the magnetic circuit system shown.

[0028] Figure 9 for Figure 8 Schematic diagram of the structure of the mounting frame shown.

[0029] Figure 10 for Figure 1 The structural schematic diagram of the first shell is shown.

[0030] Figure 11 for Figure 1 A schematic structural diagram of the first shell from another angle is shown.

[0031] Figure 12 for Figure 1 The structural schematic diagram of the second shell is shown.

[0032] Reference numerals:

[0033] 100-sounding unit;

[0034] 1-pot rack;

[0035] 11-first shell; 111-first shell body;

[0036] 112-first supporting portion; 1121-first supporting wall; 1122-second supporting wall;

[0037] 113-first connecting arm; 114-second supporting portion;

[0038] 12-second housing; 121-second housing body; 1211-vent; 122-third support portion;

[0039] 123 - second connecting arm; 124 - mounting portion; 1241 - extension arm; 1242 - mounting lug; 1243 - connecting hole; 2 - magnetic circuit system;

[0040] 21-magnetic steel assembly; 211-main magnetic steel; 2111-third channel; 212-auxiliary magnetic steel;

[0041] 213-mounting frame; 2131-mounting frame body; 2132-abutting portion; 2133-accommodating cavity;

[0042] 22-first pole core assembly; 221-first main pole core; 2211-third through hole; 222-first auxiliary pole core;

[0043] 23-second pole core assembly; 231-second main pole core; 2311-fourth through hole; 232-second auxiliary pole core; 3-vibration system;

[0044] 31-first diaphragm; 311-first diaphragm; 3111-first through hole; 312-first fold ring; 313-second fold ring;

[0045] 32 - second diaphragm; 321 - second diaphragm; 3211 - second through hole; 322 - third fold ring; 323 - fourth fold ring;

[0046] 33-first voice coil assembly; 331-first voice coil frame; 3311-first vent hole;

[0047] 332-first voice coil; 333-first channel;

[0048] 34-second voice coil assembly; 341-second voice coil frame; 3411-second bleed hole;

[0049] 342-second voice coil; 343-second channel;

[0050] 35-First wave;

[0051] 36-Second wave;

[0052] 4-end cap;

[0053] 41-posterior vocal cavity. DETAILED DESCRIPTION

[0054] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0055] It should be understood that the embodiments described are only a portion 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 persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0056] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0057] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0058] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0059] The present invention provides a sound-producing unit comprising a frame, a magnetic circuit system, a vibration system, and an end cap. The frame has a housing space, and the magnetic circuit system is disposed within the housing space, with a magnetic gap formed therein. The vibration system comprises a first diaphragm and a second diaphragm fixed to opposite sides of the frame, a first voice coil assembly inserted into the magnetic gap to drive the first diaphragm to vibrate and produce sound, and a second voice coil assembly inserted into the magnetic gap to drive the second diaphragm to vibrate and produce sound. The end cap is fixed to the side of the frame where the first or second diaphragm is located. The first diaphragm has a first through hole, the second diaphragm has a second through hole, the first voice coil assembly has a first channel extending along the vibration direction of the first diaphragm or the second diaphragm, the second voice coil assembly has a second channel extending along the vibration direction, the magnetic circuit system has a third channel extending along the vibration direction, and the first through hole, the first channel, the third channel, the second channel and the second through hole are connected in sequence to form a sound guide channel, so that the sound waves emitted by the vibrating air of the first diaphragm flow to the side where the second diaphragm is located through the sound guide channel, or the sound waves emitted by the vibrating air of the second diaphragm flow to the side where the first diaphragm is located through the sound guide channel, thereby achieving the same-phase superposition of the sound waves emitted by the vibrating air of the first diaphragm and the sound waves emitted by the vibrating air of the second diaphragm, thereby enhancing the sound quality effect of the sound unit.

[0060] See Figure 1 The embodiment of the present application provides a sound-emitting unit 100, comprising a basin frame 1, a magnetic circuit system 2, a vibration system 3 and an end cover 4. The basin frame 1 has a receiving space (not shown in the figure), the magnetic circuit system 2 is arranged in the receiving space, and the magnetic circuit system 2 forms a magnetic gap (not shown in the figure). The vibration system 3 includes a first diaphragm 31 and a second diaphragm 32 fixed on opposite sides of the basin frame 1, a first voice coil assembly 33 inserted into the magnetic gap to drive the first diaphragm 31 to vibrate and produce sound, and a second voice coil assembly 34 inserted into the magnetic gap to drive the second diaphragm 32 to vibrate and produce sound. The end cover 4 is fixed to the side of the basin frame 1 where the first diaphragm 31 or the second diaphragm 32 is provided.

[0061] The first voice coil assembly 33 has a first channel 333 extending along the vibration direction of the first diaphragm 31 or the second diaphragm 32 , and the second voice coil assembly 34 has a second channel 343 extending along the vibration direction of the first diaphragm 31 or the second diaphragm 32 .

[0062] See Figures 1 to 5 The first voice coil assembly 33 includes a first voice coil bobbin 331 and a first voice coil 332 disposed around the outer circumference of the first voice coil bobbin 331. The second voice coil assembly 34 includes a second voice coil bobbin 341 and a second voice coil 342 disposed around the outer circumference of the second voice coil bobbin 341. The first channel 333 is provided through the first voice coil bobbin 331 along the vibration direction of the first diaphragm 31 or the second diaphragm 32. The second channel 343 is provided through the second voice coil bobbin 341 along the vibration direction of the first diaphragm 31 or the second diaphragm 32.

[0063] Specifically, the first voice coil skeleton 331 and / or the second voice coil skeleton 341 are surrounded to form a hollow cylindrical structure, so that a first channel 333 extending along the vibration direction of the first diaphragm 31 or the second diaphragm 32 is formed in the middle of the first voice coil skeleton 331, and a second channel 343 extending along the vibration direction of the first diaphragm 31 or the second diaphragm 32 is formed in the middle of the second voice coil skeleton 341.

[0064] A plurality of first air leakage holes 3311 are provided on the side wall of the first voice coil skeleton 331, and a plurality of second air leakage holes 3411 are provided on the side wall of the second voice coil skeleton 341, so that the space formed between the first voice coil skeleton 331 and the first voice coil 332, and the space formed between the second voice coil skeleton 341 and the second voice coil 342 are connected to the accommodating space, so as to maintain the air pressure balance between the first voice coil assembly 33, the second voice coil assembly 34 and the accommodating space, thereby ensuring the working performance of the sound unit 100.

[0065] The shape of the projection of the first channel 333 and / or the second channel 343 along the vibration direction of the first diaphragm 31 or the second diaphragm 32 includes but is not limited to a circle, a triangle, a square, a polygon or any other arbitrary shape, which is not limited here.

[0066] The materials of the first voice coil frame 331 and / or the second voice coil frame 341 include but are not limited to kraft paper, asbestos paper, aluminum, polyimide, glass fiber, etc., and the materials of the first voice coil 332 and / or the second voice coil 342 include but are not limited to copper wire, aluminum wire, etc., which are not limited here.

[0067] The first voice coil 332 and the second voice coil 342 are used to receive the audio current. Since the first voice coil 332 and the second voice coil 342 are inserted into the magnetic gap, the first voice coil 332 and the second voice coil 342 will be subjected to a force whose magnitude is proportional to the audio current and whose direction changes with the audio current, thereby vibrating. The first voice coil 332 drives the first diaphragm 31 to vibrate and produce sound, and the second voice coil 342 drives the second diaphragm 32 to vibrate and produce sound.

[0068] The direction in which the first diaphragm 31 is driven to vibrate by the first voice coil assembly 33 is opposite to the direction in which the second diaphragm 32 is driven to vibrate by the second voice coil assembly 34, and the driving force provided by the magnetic circuit system 2 is the same, which can offset the vibration of the entire sound unit 100 caused by the vibration of the first diaphragm 31 and / or the second diaphragm 32, achieve vibration reduction, and improve the acoustic performance and structural stability of the sound unit 100.

[0069] The first diaphragm 31 has a first through hole 3111 , and the second diaphragm 32 has a second through hole 3211 . The first through hole 3111 is connected to the first channel 333 , and the second through hole 3211 is connected to the second channel 343 .

[0070] See Figures 2 to 7 The first diaphragm 31 includes a first diaphragm 311, a first fold 312, and a second fold 313. The first diaphragm 311 is fixed to the frame 1 via the first fold 312 and the second fold 313. The first through hole 3111 is defined in the first diaphragm 311. The second diaphragm 32 includes a second diaphragm 321, a third fold 322, and a fourth fold 323. The second diaphragm 321 is fixed to the frame 1 via the third fold 322 and the fourth fold 323.

[0071] Specifically, the first diaphragm 31 and the second diaphragm 32 have the same structure and are fixed in mirror-image configuration on opposite sides of the frame 1. The first and second folds 312, 313 also provide a certain degree of compliance for the vibration of the first diaphragm 311 and provide a restoring force after the first diaphragm 311 undergoes vibration deformation. The third and fourth folds 322, 323 also provide a certain degree of compliance for the vibration of the second diaphragm 321 and provide a restoring force after the second diaphragm 321 undergoes vibration deformation.

[0072] The materials of the first fold ring 312 and / or the second fold ring 313 and / or the third fold ring 322 and / or the fourth fold ring 323 include but are not limited to paper, cloth, plastic, rubber, etc., and the materials of the first vibration plate 311 and / or the second vibration plate 321 include but are not limited to paper, plastic, metal, carbon fiber, etc., which are not limited here.

[0073] Please continue to see Figures 1 to 5 The vibration system 3 further includes a first damper 35 and a second damper 36 spaced apart along the vibration direction, wherein the first damper 35 is connected between the first voice coil 332 and the basket 1 , and the second damper 36 is connected between the second voice coil 342 and the basket 1 .

[0074] Specifically, the inner edge of the first damper 35 is connected to the first voice coil 332, and the outer edge of the first damper 35 is connected to the basin frame 1 to ensure that the first voice coil 332 does not vibrate eccentrically and only vibrates along the axis of the first voice coil frame 331; the inner edge of the second damper 36 is connected to the second voice coil 342, and the outer edge of the second damper 36 is connected to the basin frame 1 to ensure that the second voice coil 342 does not vibrate eccentrically and only vibrates along the axis of the second voice coil frame 341, ultimately achieving the improvement of the sound quality effect of the sound unit 100.

[0075] The materials of the first damper 35 and / or the second damper 36 include but are not limited to cotton, aramid fiber, plastic, blended fibers, polyester, etc., which are not limited here.

[0076] The magnetic circuit system 2 has a third channel 2111 extending along the vibration direction of the first diaphragm 31 or the second diaphragm 32 , and the third channel 2111 is used to connect the first channel 333 and the second channel 343 .

[0077] See Figures 2 to 5 and Figure 8 The magnetic circuit system 2 includes a magnetic steel assembly 21 and a first pole core assembly 22 and a second pole core assembly 23 fixed on opposite sides of the magnetic steel assembly 21. The provision of the first pole core assembly 22 and the second pole core assembly 23 can improve the orientation of the magnetic lines of force and make the magnetic lines of force more concentrated, thereby enhancing the magnetic field strength within the magnetic gap, improving the vibration sensitivity of the first diaphragm 31 and the second diaphragm 32, and thus improving the sound quality of the sound unit 100.

[0078] The magnetic steel assembly 21 includes a main magnetic steel 211 and a secondary magnetic steel 212 arranged around the outer circumference of the main magnetic steel 211, and the main magnetic steel 211 and the secondary magnetic steel 212 are spaced apart to form a magnetic gap. The third channel 2111 is set along the vibration direction of the first diaphragm 31 or the second diaphragm 32 and passes through the main magnetic steel 211.

[0079] The first pole core assembly 22 includes a first main pole core 221 and a first auxiliary pole core 222, and the second pole core assembly 23 includes a second main pole core 231 and a second auxiliary pole core 232. The first main pole core 221 and the second main pole core 231 are fixedly mounted on opposite sides of the main magnet 211 along the vibration direction of the first diaphragm 31 or the second diaphragm 32, while the first auxiliary pole core 222 and the second auxiliary pole core 232 are fixedly mounted on opposite sides of the auxiliary magnet 212 along the vibration direction of the first diaphragm 31 or the second diaphragm 32. The first auxiliary pole core 222 surrounds the outer circumference of the first main pole core 221, while the second auxiliary pole core 232 surrounds the outer circumference of the second main pole core 231.

[0080] The first main pole core 221 is penetrated by a third through hole 2211 along the vibration direction of the first diaphragm 31 or the second diaphragm 32, connecting the first channel 333 and the third channel 2111. The second pole core is penetrated by a fourth through hole 2311 along the vibration direction of the first diaphragm 31 or the second diaphragm 32, connecting the second channel 343 and the third channel 2111.

[0081] The shape of the projection of the third channel 2111 along the vibration direction of the first diaphragm 31 or the second diaphragm 32 includes but is not limited to a circle, a triangle, a square, a polygon or any other arbitrary shape. The shapes of the third through hole 2211 and the fourth through hole 2311 are adapted to the shape of the third channel 2111 and are not limited here.

[0082] The materials of the main magnetic steel 211 and / or the auxiliary magnetic steel 212 include but are not limited to ferrite, brown neodymium iron boron, strontium magnet, etc. The materials of the first main pole core 221 and / or the second main pole core 231 and / or the first auxiliary pole core 222 and / or the second auxiliary pole core 232 include but are not limited to soft iron, low carbon steel or any other material with magnetic conductivity, which is not limited here.

[0083] In some embodiments, the magnetic circuit system 2 further includes a mounting frame 213 having a receiving cavity 2133 , in which the main magnet 211 is disposed. The secondary magnet 212 is disposed around the outer periphery of the mounting frame 213 , and the main magnet 211 is connected to the secondary magnet 212 via the mounting frame 213 .

[0084] See Figures 2 to 5 and Figure 9 The magnetic steel assembly 21 further includes a mounting frame 213 , and the mounting frame 213 includes a mounting frame body 2131 and a supporting portion 2132 .

[0085] The mounting frame body 2131 has a receiving cavity 2133 , the main magnet 211 is disposed in the receiving cavity 2133 , and the receiving cavity 2133 has a first opening (not shown in the figure) and a second opening (not shown in the figure) that are oppositely disposed.

[0086] Specifically, the first opening faces the first diaphragm 31, and the second opening faces the second diaphragm 32. The inner diameter of the first opening is smaller than the outer diameter of the main magnet 211, while the inner diameter of the second opening is larger than the outer diameter of the main magnet 211, so that the main magnet 211 can be accommodated in the receiving cavity 2133. The first opening is connected to the third channel 2111 and the third through hole 2211. The abutment portion 2132 extends from the second opening in the radial direction of the mounting frame body 2131 and is fixedly connected to the side of the secondary magnet 212 facing the second diaphragm 32.

[0087] The material of the mounting frame 213 includes but is not limited to plastic, paper, metal, etc., which is not limited here.

[0088] In some embodiments, the frame 1 includes a first housing 11 that secures the first diaphragm 31 and a second housing 12 that secures the second diaphragm 32. The first housing 11 is stacked on the second housing 12 along the vibration direction of the first diaphragm 31 or the second diaphragm 32. The first housing 11 and the second housing 12 together form a surrounding space. A support portion is provided within the first housing 11 or the second housing 12, and the magnetic circuit system 2 is fixed to the support portion.

[0089] See Figures 2 to 5 、 Figure 10 and Figure 11 The first shell 11 includes a first shell body 111 , a first support portion 112 disposed inside the first shell body 111 , and a plurality of first connecting arms 113 extending from the first shell body 111 to the first support portion 112 .

[0090] The first support portion 112 includes a first support wall 1121 and a second support wall 1122, wherein the first support wall 1121 extends along the vibration direction of the first diaphragm 31 or the second diaphragm 32, and the second support wall 1122 extends from the side of the first support wall 1121 close to the first diaphragm 31 along the vibration direction perpendicular to the first diaphragm 31 or the second diaphragm 32, so that the first support wall 1121 and the second support arm together form an accommodating cavity (not shown in the figure), and the magnetic circuit system 2 is accommodated in the accommodating cavity.

[0091] A plurality of second supporting portions 114 are formed on one side of the second supporting wall 1122 facing the first diaphragm 31 and extending in a direction close to the first diaphragm 31 . The outer edges of the first dampers 35 are fixed on the second supporting portions 114 .

[0092] See Figures 2 to 5 and Figure 12 The second housing 12 includes a second housing body 121, a third support portion 122 disposed inside the second housing body 121, and a plurality of second connecting arms 123 extending from the second housing body 121 to the third support portion 122. Specifically, the outer side of the second damper 36 is fixed to the side wall of the third support portion 122 facing away from the second diaphragm 32.

[0093] A plurality of vents 1211 are provided on the circumferential side wall of the second shell body 121 to connect the accommodating space with the external environment, thereby maintaining the air pressure balance between the accommodating space and the external environment and ensuring the working performance of the sound unit 100.

[0094] It is understandable that the third support portion 122 may also be formed with an accommodating cavity, and the magnetic circuit system 2 is accommodated in the accommodating cavity formed on the third support portion 122 .

[0095] At least one mounting portion 124 is provided on a side wall of the first housing 11 and / or a side wall of the second housing 12 , and the mounting portion 124 is connected to the external housing.

[0096] Please continue to see Figure 12 The mounting portion 124 extends from the side wall of the second housing 12 in a direction away from the second housing 12. The mounting portion 124 includes an extension arm 1241 and a plurality of mounting lugs 1242. The extension arm 1241 extends from the side wall of the second housing 12 in a direction away from the second housing 12, and the mounting lugs 1242 are arranged at intervals and extend from the end of the extension arm 1241 away from the second housing 12 in a direction away from the second housing 12.

[0097] Specifically, a connection hole 1243 is provided on the mounting lug 1242, and the mounting lug 1242 is plugged into the connection hole 1243 via a fastener for connection to an external housing, which may be a housing of a speaker.

[0098] It is understandable that the mounting portion 124 may also extend from the side wall of the first housing 11 in a direction away from the first housing 11. The first housing 11 and / or the second housing 12 may also be connected to the external housing by welding, integral molding, snap fit, etc., which is not limited here.

[0099] The material of the first shell 11 and / or the second shell 12 includes but is not limited to plastic, aluminum alloy, stainless steel, aluminum-magnesium alloy, etc. The first shell 11 and the second shell 12 can be fixedly connected by welding, integral molding, threaded fitting, snap fitting, etc., which is not limited here.

[0100] The end cover 4 is fixed to one side of the basin frame 1 where the first diaphragm 31 or the second diaphragm 32 is provided, so that a rear acoustic cavity 41 is formed between the end cover 4 and the first diaphragm 31 or the second diaphragm 32 .

[0101] Please continue to see Figures 2 to 5 The outer edge of the first fold 312 is connected to the first housing body 111, the inner edge of the first fold 312 is connected to the outer edge of the first diaphragm 311, the outer edge of the second fold 313 is connected to the inner edge of the first diaphragm 311, and the inner edge of the second fold 313 is connected to the end of the first voice coil bobbin 331 closest to the first diaphragm 311. The end of the first voice coil bobbin 331 away from the first diaphragm 311 is connected to the first main pole core 221. The first voice coil 332 is disposed around the outer circumference of the first voice coil bobbin 331, with at least a portion of the first voice coil 332 inserted into the magnetic gap. The inner edge of the first damper 35 is connected to the sidewall of the first voice coil 332, and the outer edge of the first damper 35 is connected to the second support portion 114.

[0102] The outer edge of the third fold 322 is connected to the second housing body 121, and the inner edge of the third fold 322 is connected to the outer edge of the second diaphragm 321. The outer edge of the fourth fold 323 is connected to the inner edge of the second diaphragm 321, and the inner edge of the fourth fold 323 is connected to the end of the second voice coil bobbin 341 closest to the second diaphragm 321. The end of the second voice coil bobbin 341 away from the second diaphragm 321 is connected to the second main pole core 231. The second voice coil 342 is disposed around the outer circumference of the second voice coil bobbin 341, with at least a portion of the second voice coil 342 inserted into the magnetic gap. The inner edge of the second damper 36 is connected to the sidewall of the second voice coil 342, and the outer edge of the second damper 36 is connected to the third support portion 122.

[0103] The end cap 4 is fixed to the side of the frame 1 where the second diaphragm 32 is provided, and a rear acoustic cavity 41 is formed between the second diaphragm 32 and the end cap 4. When the second voice coil 342 drives the second diaphragm 32 to vibrate and produce sound, the sound waves emitted by the air in the acoustic cavity 41 after the second diaphragm 32 vibrates can flow sequentially from the second through hole 3211, the second channel 343, the third channel 2111, the first channel 333, and the first through hole 3111 to the side where the first diaphragm 31 is located. This allows the sound waves emitted by the air vibrating the first diaphragm 31 and the sound waves emitted by the air vibrating the second diaphragm 32 to be superimposed in phase, thereby enhancing the sound quality of the speaker and doubling the effective vibration area of the diaphragm, significantly increasing the vibration loudness of the sound unit 100 and improving the acoustic performance.

[0104] It is understood that the end cap 4 can also be fixed to the side of the frame 1 where the first diaphragm 31 is provided, with a rear acoustic cavity 41 formed between the first diaphragm 31 and the end cap 4. When the first voice coil 332 drives the first diaphragm 31 to vibrate and produce sound, the sound waves emitted by the air in the acoustic cavity 41 after the vibration of the first diaphragm 31 can flow sequentially from the first through hole 3111, the first channel 333, the third channel 2111, the second channel 343, and the second through hole 3211 to the side where the second diaphragm 32 is located.

[0105] The material of the end cap 4 includes but is not limited to rubber, plastic, aluminum alloy, stainless steel, aluminum-magnesium alloy, etc., and the end cap 4 and the first shell 11 or the second shell 12 can be fixedly connected by welding, integral molding, threaded fitting, snap fitting, etc., which are not limited here.

[0106] The present application also provides a speaker including the aforementioned sound-emitting unit 100. The speaker can be applied to various electronic devices such as car audio, laptop computers, smartphones, tablet computers, virtual reality helmets, smart bracelets, etc., smart screens, smart toys, and smart sound billboards.

[0107] Taking car audio as an example, the speaker can be installed in the car door, clothes rack and other places. Since the sound unit 100 can offset the vibration of the entire sound unit 100 or the speaker caused by the vibration of the first diaphragm 31 and / or the second diaphragm 32 to achieve vibration reduction, the influence of the installation space in the car on the acoustic performance of the speaker can be reduced to provide a clean bass effect.

[0108] Compared with the prior art, in a sound unit 100 and a loudspeaker provided in an embodiment of the present application, the sound unit 100 includes a first diaphragm 31 and a second diaphragm 32 fixed on opposite sides of a basin frame 1. Under the action of the magnetic circuit system 2, the first voice coil assembly 33 drives the first diaphragm 31 to vibrate in a direction opposite to the direction in which the second voice coil assembly 34 drives the second diaphragm 32 to vibrate, and the driving force provided by the magnetic circuit system 2 is the same, which can offset the vibration of the entire sound unit 100 or the loudspeaker caused by the vibration of the first diaphragm 31 and / or the second diaphragm 32, thereby achieving vibration reduction, improving the acoustic performance and structural stability of the sound unit 100, and thereby ensuring the working performance of the loudspeaker.

[0109] In addition, since the end cover 4 is fixed to the side of the basin frame 1 where the first diaphragm 31 or the second diaphragm 32 is provided, the first diaphragm 31 has a first through hole 3111, the second diaphragm 32 has a second through hole 3211, the first voice coil assembly 33 has a first channel 333, the second voice coil assembly 34 has a second channel 343, the magnetic circuit system 2 has a third channel 2111, and the first through hole 3111, the first channel 333, the third channel 2111, the second channel 343 and the second through hole 3211 are connected in sequence to form a sound guide channel, which can make the sound waves emitted by the first diaphragm 31 vibrating the air flow to the side where the second diaphragm 32 is located through the sound guide channel, or make the sound waves emitted by the second diaphragm 32 vibrating the air flow to the side where the first diaphragm 31 is located, so that the sound waves emitted by the first diaphragm 31 vibrating the air and the sound waves emitted by the second diaphragm 32 vibrating the air are superimposed in the same phase, thereby enhancing the sound quality of the speaker.

[0110] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sound-emitting unit, characterized in that: include: A basin frame, wherein the basin frame has a receiving space; a magnetic circuit system, the magnetic circuit system being disposed in the accommodation space and forming a magnetic gap; a vibration system comprising a first diaphragm and a second diaphragm fixedly mounted on opposite sides of the frame, a first voice coil assembly inserted into the magnetic gap to drive the first diaphragm to vibrate and produce sound, and a second voice coil assembly inserted into the magnetic gap to drive the second diaphragm to vibrate and produce sound; an end cover, the end cover being fixedly mounted on a side of the basin frame on which the first diaphragm or the second diaphragm is mounted; The first diaphragm has a first through-hole, the second diaphragm has a second through-hole, the first voice coil assembly has a first channel extending along a vibration direction of the first diaphragm or the second diaphragm, the second voice coil assembly has a second channel extending along the vibration direction, the magnetic circuit system has a third channel extending along the vibration direction, and the first through-hole, the first channel, the third channel, the second channel, and the second through-hole are sequentially connected; When the end cover is fixed to the side of the frame on which the first diaphragm is provided, a rear acoustic cavity is formed between the first diaphragm and the end cover. When the first voice coil assembly drives the first diaphragm to vibrate and produce sound, the sound waves generated by the first diaphragm vibrating the air in the rear acoustic cavity can flow sequentially from the first through hole, the first channel, the third channel, the second channel, and the second through hole to the side on which the second diaphragm is located. When the end cover is fixed to the side of the basin frame on which the second diaphragm is provided, a rear sound cavity is formed between the second diaphragm and the end cover. When the second voice coil assembly drives the second diaphragm to vibrate and produce sound, the sound waves emitted by the second diaphragm vibrating the air in the rear sound cavity can flow in sequence from the second through hole, the second channel, the third channel, the first channel and the first through hole to the side where the first diaphragm is located.

2. The sound-emitting unit according to claim 1, characterized in that: The magnetic circuit system includes a main magnetic steel and a secondary magnetic steel arranged around the outer circumference of the main magnetic steel, and the main magnetic steel and the secondary magnetic steel are spaced apart to form the magnetic gap; The third channel is arranged to penetrate the main magnetic steel along the vibration direction.

3. The sound-emitting unit according to claim 2, characterized in that: The magnetic circuit system further includes a first main pole core and a second main pole core fixedly provided on opposite sides of the main magnetic steel along the vibration direction, and a first secondary pole core and a second secondary pole core fixedly provided on opposite sides of the secondary magnetic steel along the vibration direction, wherein the first secondary pole core is arranged around the outer periphery of the first main pole core, and the second secondary pole core is arranged around the outer periphery of the first main pole core; The first main pole core is penetrated along the vibration direction to form a third through hole for connecting the first channel and the third channel, and the second main pole core is penetrated along the vibration direction to form a fourth through hole for connecting the second channel and the third channel.

4. The sound-emitting unit according to claim 3, characterized in that: The first voice coil assembly includes a first voice coil frame fixed between the first diaphragm and the first main pole core, and a first voice coil arranged around the outer circumference of the first voice coil frame, and the first channel is arranged through the first voice coil frame along the vibration direction; The second voice coil assembly includes a second voice coil frame fixed between the second diaphragm and the second main pole core, and a second voice coil arranged around the outer circumference of the second voice coil frame, and the second channel is arranged through the second voice coil frame along the vibration direction; At least a portion of the first voice coil and at least a portion of the second voice coil are inserted into the magnetic gap.

5. The sound-emitting unit according to claim 3, characterized in that: The magnetic circuit system further includes a mounting frame, the mounting frame including a mounting frame body and an abutting portion, wherein the mounting frame body has a receiving cavity, the main magnetic steel is disposed in the receiving cavity, and the receiving cavity has a first opening and a second opening disposed opposite to each other; The first opening faces the first diaphragm, the second opening faces the second diaphragm, the inner diameter of the first opening is smaller than the outer diameter of the main magnetic steel, and the inner diameter of the second opening is larger than the outer diameter of the main magnetic steel; The abutting portion extends from the second opening along the radial direction of the mounting frame body, and the abutting portion is fixedly connected to a side of the secondary magnetic steel facing the second diaphragm.

6. The sound-emitting unit according to claim 4, characterized in that: The vibration system further includes a first damper and a second damper spaced apart along the vibration direction, wherein the first damper is connected between the first voice coil and the basket, and the second damper is connected between the second voice coil and the basket.

7. The sound-emitting unit according to claim 4, characterized in that: The first diaphragm includes a first diaphragm, a first fold ring, and a second fold ring, and the first through hole is opened in the first diaphragm, wherein the first fold ring is connected between the outer edge of the first diaphragm and the basin frame, and the second fold ring is connected between the inner edge of the first diaphragm and the first voice coil frame; And / or, the second diaphragm includes a second diaphragm, a third fold ring and a fourth fold ring, and the second through hole is opened on the second diaphragm, wherein the third fold ring is connected between the outer edge of the second diaphragm and the basin frame, and the fourth fold ring is connected between the inner edge of the second diaphragm and the second voice coil frame.

8. The sound-emitting unit according to claim 1, characterized in that: The basin frame includes a first shell for fixing the first diaphragm and a second shell for fixing the second diaphragm, wherein the first shell is stacked on the second shell along the vibration direction; A support portion is provided in the first shell or the second shell, and the magnetic circuit system is fixed to the support portion.

9. The sound-emitting unit according to claim 8, characterized in that: The side wall of the first shell and / or the side wall of the second shell is provided with at least one mounting portion, and the mounting portion is connected to the external shell.

10. A speaker, characterized in that: It comprises a sound-emitting unit as described in any one of claims 1 to 9.

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