Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a diaphragm assembly, a voice coil and a second auxiliary diaphragm, the diaphragm assembly comprises a voice diaphragm, the voice diaphragm comprises an inner fixing part, a folding ring part and an outer fixing part which are sequentially connected from inside to outside, the outer fixing part is connected with the basin stand, the inner fixing part is provided with lower convex blocks which are oppositely arranged, the lower convex blocks are connected with a first auxiliary diaphragm, and the second auxiliary diaphragm is connected with a second auxiliary diaphragm. The first auxiliary film and the voice diaphragm are of an integrated structure which is integrally processed and formed; the voice coil is located between at least one group of two lower protruding blocks which are oppositely arranged, the top of the voice coil is connected with the vibrating diaphragm assembly, and the bottom of the voice coil is connected with the first auxiliary diaphragm. The second auxiliary film comprises an inner bonding part, a deformation part and an outer bonding part which are connected in sequence, the outer bonding part is connected with the basin stand, and the inner bonding part is connected with the lower convex block and / or the voice coil. The sound production unit is novel in structure, is provided with a double-auxiliary-film structure, can more effectively inhibit the rolling vibration of the voice coil, and improves the performance of the sound production unit, especially the acoustic performance under a large-amplitude working condition. The first auxiliary film and the voice diaphragm are integrally formed, the assembly process is simplified, and the cost reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a sound generating unit. Background Art

[0002] As a common electroacoustic transducer device that converts electrical energy into sound energy, the sound unit plays an indispensable role in the sound amplification system.

[0003] In order to achieve higher performance by pursuing a larger amplitude of the sound unit, the industry usually adds a sub-membrane to the sound unit to assist the vibration of the voice coil and improve the polarization phenomenon of the voice coil under large amplitude conditions. Currently, the industry generally only sets one set of sub-membranes. In actual use, the applicant found that in some sound units that pursue a larger amplitude, the improvement effect of a single set of sub-membranes on the rolling vibration of the voice coil is unsatisfactory, and the voice coil still has a certain degree of polarization. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sound-generating unit with a new structure, in which the voice coil is not prone to polarization, rolling vibration and the like.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sound unit, comprising:

[0006] basin stand;

[0007] A diaphragm assembly, a sound diaphragm of the diaphragm assembly, the sound diaphragm comprising an inner fixing portion, a folding ring portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being connected to the basin frame, the inner fixing portion having lower protrusions arranged opposite to each other, the lower protrusions being connected to a first auxiliary diaphragm, the first auxiliary diaphragm and the sound diaphragm being an integral structure formed by integral processing;

[0008] A voice coil, the voice coil being located between at least one group of two lower protrusions arranged opposite to each other, the top of the voice coil being connected to the diaphragm assembly, and the bottom of the voice coil being connected to the first secondary membrane;

[0009] The second auxiliary membrane comprises an inner bonding portion, a deformation portion and an outer bonding portion which are connected in sequence, the outer bonding portion is connected to the basin frame, and the inner bonding portion is connected to the lower protrusion and / or the voice coil.

[0010] Furthermore, the first auxiliary film includes a connecting portion and an arc-shaped portion connecting the connecting portion and the lower protrusion.

[0011] Furthermore, the protruding direction of the arc portion is consistent with or opposite to the protruding direction of the folding ring portion.

[0012] Furthermore, it also includes a centering support plate, which includes an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence, the outer mounting portion is fixedly connected to the basin frame, the inner mounting portion is fixedly connected to the lower protrusion, the outer bonding portion of the second secondary membrane is connected to the outer mounting portion to be indirectly connected to the basin frame, the inner bonding portion of the second secondary membrane is connected to the inner mounting portion to be indirectly connected to the lower protrusion, and / or the inner bonding portion of the second secondary membrane is directly connected to the voice coil.

[0013] Furthermore, the centering support plate further includes an extension arm, a partial area of ​​the inner mounting portion extends toward a direction close to the voice coil to form the extension arm, and the extension arm is fixedly connected to the voice coil.

[0014] Furthermore, at least a partial area of ​​the inner bonding portion is connected to the extension arm.

[0015] Furthermore, the extension arms are correspondingly provided on both sides of the first secondary film.

[0016] Furthermore, the centering support is electrically connected to the voice coil, and an exposed solder pad is provided on the centering support.

[0017] The beneficial effects of the utility model are as follows: the sound unit has a novel structure and a double auxiliary membrane structure, which can more effectively suppress the rolling vibration of the voice coil and improve the performance of the sound unit, especially the acoustic performance under large amplitude conditions. Moreover, the first auxiliary membrane and the sound membrane are an integrated structure formed by integral processing, which can directly save a auxiliary membrane production assembly line, which is conducive to simplifying the assembly process and achieving the effect of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of the sound unit of the first embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional view of the sound unit of the first embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the sound-emitting unit of Embodiment 1 of the utility model after the magnetic circuit component is hidden;

[0021] Figure 4 For Figure 3 A schematic diagram of a structure in which a second auxiliary membrane and a centering support sheet are hidden on the basis of the structure shown.

[0022] Description of labels:

[0023] 1. Basin stand;

[0024] 21. Sound membrane; 211. Internal fixing part; 212. Folding ring part; 213. External fixing part; 22. Dome; 23. Lower convex block; 24. First auxiliary membrane; 241. Connecting part; 242. Arc-shaped part; 25. Metal frame;

[0025] 3. Voice coil;

[0026] 4. Magnetic circuit components;

[0027] 5. second secondary film; 51. inner bonding portion; 52. deformation portion; 53. outer bonding portion;

[0028] 6. Centering support piece; 61. Inner mounting portion; 62. Cantilever portion; 63. Outer mounting portion; 64. Extension arm. DETAILED DESCRIPTION

[0029] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0030] Please refer to Figures 1 to 4 , sound unit, including:

[0031] Basin rack 11;

[0032] A diaphragm assembly, a sound diaphragm 21 of the diaphragm assembly, the sound diaphragm 21 comprising an inner fixing portion 211, a folding ring portion 212 and an outer fixing portion 213 connected in sequence from the inside to the outside, the outer fixing portion 213 connected to the basin frame 11, the inner fixing portion 211 having lower protrusions 23 arranged opposite to each other, the lower protrusions 23 being connected to a first auxiliary membrane 24, the first auxiliary membrane 24 and the sound diaphragm 21 being an integral structure formed by integral processing;

[0033] A voice coil 3, wherein the voice coil 3 is located between at least one group of two lower protrusions 23 that are arranged opposite to each other, the top of the voice coil 3 is connected to the diaphragm assembly, and the bottom of the voice coil 3 is connected to the first secondary membrane 24;

[0034] The second auxiliary membrane 5 includes an inner adhesive portion 51 , a deformation portion 52 and an outer adhesive portion 53 which are connected in sequence, the outer adhesive portion 53 is connected to the basin frame 11 , and the inner adhesive portion 51 is connected to the lower protrusion 23 and / or the voice coil 3 .

[0035] From the above description, it can be seen that the beneficial effects of the utility model are: the sound unit has a novel structure and a double auxiliary membrane structure, which can more effectively suppress the rolling vibration of the voice coil 3 and improve the performance of the sound unit, especially the acoustic performance under large amplitude conditions. Moreover, the first auxiliary membrane 24 and the sound membrane 21 are an integrated structure formed by integral processing, which can directly save a auxiliary membrane production assembly line, which is conducive to simplifying the assembly process and achieving cost reduction.

[0036] Furthermore, the first auxiliary film 24 includes a connecting portion 241 and an arc portion 242 connecting the connecting portion 241 and the lower protrusion 23 .

[0037] It can be seen from the above description that the first auxiliary film 24 has a simple overall structure and is easy to process and manufacture.

[0038] Furthermore, the protruding direction of the arc portion 242 is consistent with or opposite to the protruding direction of the folding ring portion 212 .

[0039] From the above description, it can be seen that the arc portion 242 can be bent in either a positive direction or a negative direction, which can be determined according to actual needs. Similarly, the folding ring portion 212 can be either a positive folding ring or a negative folding ring, which can be determined according to production requirements.

[0040] Furthermore, it also includes a centering support plate 6, which includes an inner mounting portion 61, a cantilever portion 62 and an outer mounting portion 63 connected in sequence, the outer mounting portion 63 is fixedly connected to the basin frame 11, the inner mounting portion 61 is fixedly connected to the lower protrusion 23, the outer bonding portion 53 of the second secondary membrane 5 is connected to the outer mounting portion 63 to be indirectly connected to the basin frame 11, the inner bonding portion 51 of the second secondary membrane 5 is connected to the inner mounting portion 61 to be indirectly connected to the lower protrusion 23, and / or the inner bonding portion 51 of the second secondary membrane 5 is directly connected to the voice coil 3.

[0041] From the above description, it can be seen that the presence of the centering support plate 6 can better correct the voice coil 3, and the voice coil 3 can also be connected to the external power supply through the centering support plate 6. In addition, the presence of the second secondary membrane 5 can reduce the stress on the centering support plate 6 during vibration and reduce the risk of breakage of the centering support plate 6, which is beneficial to ensure the service life of the sound unit.

[0042] Furthermore, the centering support plate 6 further includes an extension arm 64 . A portion of the inner mounting portion 61 extends toward the direction close to the voice coil 3 to form the extension arm 64 . The extension arm 64 is fixedly connected to the voice coil 3 .

[0043] It can be seen from the above description that the centering support plate 6 is directly connected to the voice coil 3 , so as to better correct the deviation of the voice coil 3 .

[0044] Furthermore, at least a partial area of ​​the inner bonding portion 51 is connected to the extension arm 64 .

[0045] It can be seen from the above description that the second auxiliary film 5 plays a certain supporting role on the extension arm 64 of the centering support piece 6, which can better prevent the centering support piece 6 from being broken.

[0046] Furthermore, the extension arms 64 are correspondingly disposed on both sides of the first auxiliary film 24 .

[0047] It can be seen from the above description that the extending arm 64 is reasonably disposed at a position so that the centering support plate 6 can provide a more balanced supporting force for the voice coil 3 .

[0048] Furthermore, the centering support plate 6 is electrically connected to the voice coil 3 , and an exposed solder pad is provided on the centering support plate 6 .

[0049] It can be seen from the above description that the sound unit can be conducted by using the centering support 6 .

[0050] Embodiment 1

[0051] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is: a sound unit, which can be applied to electronic devices such as mobile phones, tablet computers, smart watches, game controllers, etc.

[0052] The sound unit includes a basin frame 11 and a vibration component and a magnetic circuit component 4 respectively connected to the basin frame 11, the magnetic circuit component 4 has a magnetic gap, the vibration component includes a diaphragm component and a voice coil 3 connected to the diaphragm component, the voice coil 3 is arranged corresponding to the magnetic gap, the diaphragm component includes a sound membrane 21, and the sound membrane 21 is fixed to the basin frame 11 by glue. Specifically, the sound membrane 21 includes an inner fixed part 211, a folding ring part 212 and an outer fixed part 213 connected in sequence from the inside to the outside, the outer fixed part 213 is connected to the basin frame 11, the inner fixed part 211 has a relatively arranged lower protrusion 23, and the lower protrusion 23 is connected to a first auxiliary membrane 24, the first auxiliary membrane 24 and the sound membrane 21 are an integrated structure formed by integral processing, specifically, the first auxiliary membrane 24 and the sound membrane 21 can be an integrated structure formed by integral injection molding, or an integrated structure formed by hot pressing, which can be selected according to actual production needs.

[0053] In this embodiment, the diaphragm assembly further includes a dome 22 connected to the inner fixing portion 211 , and the voice coil 3 is fixedly connected to the dome 22 .

[0054] Specifically, the voice coil 3 is located between at least one group of two lower protrusions 23 that are arranged opposite to each other, the top of the voice coil 3 is connected to the diaphragm assembly, and the bottom of the voice coil 3 is connected to the first auxiliary membrane 24. More specifically, the first auxiliary membrane 24 includes a connecting portion 241 and an arc portion 242 connecting the connecting portion 241 and the lower protrusion 23. Preferably, the connecting position between the first auxiliary membrane 24 and the lower protrusion 23 is located at the bottom end of the lower protrusion 23.

[0055] To facilitate processing, optionally, the basin frame 11 is made of metal material, and the sound membrane 21 and the basin frame 11 are formed into an integrated structure by injection molding.

[0056] In order to improve the rigidity of a local area of ​​the diaphragm assembly, the diaphragm assembly may further include a metal skeleton 25, a partial area of ​​the metal skeleton 25 is connected to the inner fixing portion 211, and a partial area of ​​the metal skeleton 25 is connected to the lower protrusion 23. Preferably, the metal skeleton 25 and the sound membrane 21 are formed into an integral structure by injection molding. Further preferably, a partial area of ​​the metal skeleton 25 is embedded in the inner fixing portion 211, and a partial area of ​​the metal skeleton 25 is embedded in the lower protrusion 23.

[0057] The sound unit also includes a second auxiliary membrane 5, which includes an inner bonding part 51, a deformation part 52 and an outer bonding part 53 connected in sequence, the outer bonding part 53 is connected to the basin frame 11, and the inner bonding part 51 is connected to the lower protrusion 23 and / or the voice coil 3.

[0058] Optionally, the sound unit further includes a centering support piece 6, the centering support piece 6 includes an inner mounting portion 61, a cantilever portion 62 and an outer mounting portion 63 connected in sequence, the outer mounting portion 63 is fixedly connected to the basin frame 11, the inner mounting portion 61 is fixedly connected to the lower protrusion 23, the outer bonding portion 53 of the second auxiliary membrane 5 is connected to the outer mounting portion 63 to be indirectly connected to the basin frame 11, and the inner bonding portion 51 of the second auxiliary membrane 5 is connected to the inner mounting portion 61 to be indirectly connected to the lower protrusion 23. Of course, in a specific product, the inner bonding portion 51 of the second auxiliary membrane 5 can also be directly connected to the voice coil 3, and of course, the inner bonding portion 51 of the second auxiliary membrane 5 can be connected to both the inner mounting portion 61 and the voice coil 3.

[0059] Preferably, the centering support 6 further includes an extension arm 64, and a portion of the inner mounting portion 61 extends toward the direction close to the voice coil 3 to form the extension arm 64, and the extension arm 64 is fixedly connected to the voice coil 3. In a specific product, the voice coil 3 may also be electrically connected to an external power supply through the centering support 6, and in this case, an exposed pad may be provided on the centering support 6.

[0060] In this embodiment, at least a part of the inner bonding portion 51 is connected to the extension arm 64. In a specific product, the inner bonding portion 51 may be configured such that a part of the inner bonding portion 51 is connected to the extension arm 64 and the inner mounting portion 61, and another part of the inner bonding portion 51 is connected to the voice coil 3.

[0061] The extending arms 64 are correspondingly disposed on both sides of the first auxiliary film 24 . Preferably, the extending arms 64 on both sides of the first auxiliary film 24 are symmetrically disposed.

[0062] The protruding direction of the arc portion 242 is consistent with or opposite to the protruding direction of the folding ring portion 212. The protruding direction of the arc portion 242 and the protruding direction of the folding ring portion 212 have at least the following four forms:

[0063] 1. The arc portion 242 protrudes downward, and the folding ring portion 212 is a reverse folding ring.

[0064] Second, the arc portion 242 protrudes downward, and the folding ring portion 212 is a positive folding ring.

[0065] 3. The arc portion 242 protrudes upward, and the folding ring portion 212 is a reverse folding ring.

[0066] Fourth, the arc portion 242 protrudes upward, and the folding ring portion 212 is a positive folding ring.

[0067] In summary, the sound unit provided by the utility model has a novel structure and a double auxiliary membrane structure, which can more effectively suppress the rolling vibration of the voice coil and improve the performance of the sound unit, especially the acoustic performance under large amplitude conditions. Moreover, the first auxiliary membrane and the sound membrane are an integrated structure formed as one body, which can directly save a auxiliary membrane production assembly line, which is conducive to simplifying the assembly process and achieving cost reduction.

[0068] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A sound generating unit, characterized in that: include basin stand; A diaphragm assembly, a sound diaphragm of the diaphragm assembly, the sound diaphragm comprising an inner fixing portion, a folding ring portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being connected to the basin frame, the inner fixing portion having lower protrusions arranged opposite to each other, the lower protrusions being connected to a first auxiliary diaphragm, the first auxiliary diaphragm and the sound diaphragm being an integral structure formed by integral processing; A voice coil, the voice coil being located between at least one group of two lower protrusions arranged opposite to each other, the top of the voice coil being connected to the diaphragm assembly, and the bottom of the voice coil being connected to the first secondary membrane; The second auxiliary membrane comprises an inner bonding portion, a deformation portion and an outer bonding portion which are connected in sequence, the outer bonding portion is connected to the basin frame, and the inner bonding portion is connected to the lower protrusion and / or the voice coil.

2. The sound generating unit according to claim 1, characterized in that: The first auxiliary film includes a connecting portion and an arc portion connecting the connecting portion and the lower protrusion.

3. The sound generating unit according to claim 2, characterized in that: The protruding direction of the arc portion is consistent with or opposite to the protruding direction of the folding ring portion.

4. The sound generating unit according to claim 1, characterized in that: It also includes a centering support plate, which includes an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence, the outer mounting portion is fixedly connected to the basin frame, the inner mounting portion is fixedly connected to the lower protrusion, the outer bonding portion of the second secondary membrane is connected to the outer mounting portion to be indirectly connected to the basin frame, the inner bonding portion of the second secondary membrane is connected to the inner mounting portion to be indirectly connected to the lower protrusion, and / or the inner bonding portion of the second secondary membrane is directly connected to the voice coil.

5. The sound generating unit according to claim 4, characterized in that: The centering support plate further includes an extension arm. A partial area of ​​the inner mounting portion extends toward a direction close to the voice coil to form the extension arm, and the extension arm is fixedly connected to the voice coil.

6. The sound generating unit according to claim 5, characterized in that: At least a partial area of ​​the inner bonding portion is connected to the extension arm.

7. The sound generating unit according to claim 5, characterized in that: The extension arms are correspondingly disposed on both sides of the first secondary film.

8. The sound generating unit according to claim 4, characterized in that: The centering support is electrically connected to the voice coil, and an exposed solder pad is provided on the centering support.

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