Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a basin stand, a vibration assembly, a magnetic circuit assembly and a supporting part, and is characterized in that the vibration assembly comprises a diaphragm assembly and two voice coils, and the diaphragm assembly is connected with the voice coils and the basin stand; the magnetic circuit assembly comprises a yoke, two groups of central magnetic structures and two groups of side magnetic structures, the central magnetic structures and the side magnetic structures are respectively arranged on the yoke, the central magnetic structures are arranged side by side, the central magnetic structures and the voice coils are in one-to-one correspondence, the side magnetic structures are arranged around the central magnetic structures, each side magnetic structure comprises two groups of concave magnetic structures which are oppositely arranged, and the concave magnetic structures are in one-to-one correspondence with the voice coils. Two gaps are formed between the two groups of concave magnetic structures, and the gaps are arranged corresponding to a gap between the two voice coils; the supporting part comprises an inner fixing part, a deformation part and an outer fixing part which are sequentially connected from inside to outside, the outer fixing part is connected with the basin frame, the inner fixing part is connected with the two voice coils, and the deformation part is located in the gap. The sounding unit is novel in structure, large in BL value and good in performance.

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] In order to improve the utilization rate of the magnetic steel, provide stronger driving force, enhance the sensitivity of the sound unit and increase the loudness, a solution with dual voice coils placed side by side has appeared on the market.

[0003] To suppress the rolling vibration of the voice coil assembly, a support component is generally added to the sound unit. However, in existing sound units, the connection points between the support component and the voice coil assembly are usually located at the four corners of the voice coil assembly. The side magnetic structure area corresponding to the support component needs to be designed to avoid air. This will undoubtedly result in the sound unit's magnetic steel volume being unable to increase. At the same time, the length of the effective magnetic gap cannot be increased, making it difficult to improve the performance of the sound unit. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance sound-generating unit.

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

[0006] basin rack;

[0007] A vibration assembly, the vibration assembly comprising a diaphragm assembly and two voice coils, the diaphragm assembly connecting the voice coils and the basin frame;

[0008] A magnetic circuit assembly comprising a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, wherein the central magnetic structures are arranged in two groups side by side, the central magnetic structures corresponding one to one with the voice coils, the side magnetic structures are disposed around the central magnetic structure, and the side magnetic structures include two groups of concave magnetic structures disposed opposite each other, with two gaps formed between the two groups of concave magnetic structures, the gaps corresponding to the gaps between the two voice coils;

[0009] The supporting component includes an inner fixing portion, a deformable portion and an outer fixing portion which are sequentially connected from the inside to the outside, the outer fixing portion is connected to the basin frame, the inner fixing portion is connected to the two voice coils, and the deformable portion is located in the gap.

[0010] In one embodiment, the magnetic poles of the two groups of central magnetic structures are oriented in opposite directions, and the magnetic poles of the central magnetic structure and the adjacent concave magnetic structures are oriented in opposite directions.

[0011] In one embodiment, the two voice coils are bonded to each other, or the two voice coils are arranged without contacting each other.

[0012] In one embodiment, the supporting component is a secondary membrane.

[0013] In one embodiment, the supporting component is an FPC board.

[0014] In one embodiment, the two gaps are respectively provided with the FPC boards, the FPC boards are provided with a conducting structure, and the two voice coils are connected in series or in parallel through the FPC boards.

[0015] In one embodiment, the conductive structure includes an inner pad, the inner fixing portion has an extension portion extending into the gap, and the inner pad is disposed on the extension portion.

[0016] In one embodiment, the number of the extending portions is two, and a partial area of ​​the deformable portion is located between the two extending portions.

[0017] In one embodiment, the concave magnetic structure includes an outer magnetic steel and an outer washer, the outer magnetic steel connects the yoke and the outer washer, and the outer magnetic steel is concave in shape as a whole.

[0018] In one embodiment, the outer magnetic steel is an integrated structure; or, the outer magnetic steel is formed by splicing a plurality of sub-magnetic steels, and the corners of the outer magnetic steel formed by splicing a plurality of sub-magnetic steels have no vacant areas.

[0019] The beneficial effects of the present invention are as follows: the structure of the sound unit is novel, and the four corners of the edge magnetic structure do not need to be kept free, so that the volume of the edge magnetic structure in the sound unit can be increased, thereby improving the B value of the sound unit. At the same time, it can also increase the effective length of the magnetic gap, that is, increase the L value of the sound unit. After the BL value of the sound unit is increased, the performance of the sound unit can also be significantly improved.

[0020] The deformation part is located in the gap, and the deformation part does not need to occupy the outer space of the edge magnetic structure. Without changing the outline size of the sound unit, the edge magnetic structure can be expanded outward, thereby increasing the volume of the edge magnetic structure to a greater extent and improving the performance of the sound unit.

[0021] The sound unit adopts a dual voice coil structure, which can effectively enhance the driving force, enabling the sound unit to achieve large amplitude, loudness and high sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0023] Figure 1 This is an exploded view of the sound unit of the first embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 2 ;

[0026] Figure 4 This is a structural diagram of part of the structure of the sound-emitting unit of the second embodiment of the present invention.

[0027] Description of Figure Numbers:

[0028] 1. Basin rack;

[0029] 2. Diaphragm assembly;

[0030] 3. Voice coil;

[0031] 41. Yoke; 42. Center magnetic structure; 43. Concave magnetic structure; 431. External magnetic steel; 432. External washer; 44. Gap;

[0032] 5. Supporting member; 51. Internal fixing portion; 511. Extending portion; 52. Deformable portion; 53. External fixing portion;

[0033] 61. Inner pad; 62. Outer pad. DETAILED DESCRIPTION

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0035] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0038] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0039] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0040] Example 1

[0041] Please refer to Figures 1 to 3 , the utility model embodiment 1 is: a sound unit, including a basin 1, a vibration assembly, a magnetic circuit assembly and a support component 5, the vibration assembly includes a diaphragm assembly 2 and two voice coils 3, the diaphragm assembly 2 connects the voice coil 3 and the basin 1; the magnetic circuit assembly includes a yoke 41 and a central magnetic structure 42 and a side magnetic structure respectively provided on the yoke 41, the central magnetic structure 42 is two groups arranged side by side, the central magnetic structure 42 corresponds to the voice coil 3 one by one, and the side magnetic structure surrounds the central magnetic structure 42 The edge magnetic structure includes two groups of concave magnetic structures 43 arranged opposite to each other, and two gaps 44 are formed between the two groups of concave magnetic structures 43, and the gaps 44 correspond to the gaps between the two voice coils 3; the number of the supporting components 5 is two, and the supporting components 5 include an inner fixed portion 51, a deformation portion 52 and an outer fixed portion 53 connected in sequence from the inside to the outside, the outer fixed portion 53 is connected to the basin frame 1, the inner fixed portion 51 is connected to the two voice coils 3, and the deformation portion 52 is located in the gap 44.

[0042] The central magnetic structure 42 includes a central magnetic steel and a central washer. The central magnetic steel connects the central washer and the yoke 41 .

[0043] The magnetic poles of the two groups of central magnetic structures 42 are oriented in opposite directions, and the magnetic poles of the central magnetic structure 42 and the concave magnetic structure 43 adjacent to it are oriented in opposite directions. That is to say, the magnetic poles of the two groups of concave magnetic structures 43 are also oriented in opposite directions. At this time, the existence of the gap 44 can also improve the self-circulation of the two groups of concave magnetic structures 43, forming a magnetic loop, which leads to a reduction in the magnetic flux lines toward the magnetic gap. In short, the existence of the gap 44 reduces the influence of the self-circulation of the edge magnetic structure.

[0044] In this embodiment, the two voice coils 3 are bonded to each other. In other embodiments, it is also acceptable for the two voice coils 3 to be arranged without contacting each other.

[0045] In one embodiment, the supporting component 5 is a secondary membrane. In this embodiment, the supporting component 5 is an FPC board. Specifically, the two gaps 44 are respectively provided with the FPC board, and the FPC board is provided with a conductive structure. The two voice coils 3 are connected in series or in parallel through the FPC board. When the two voice coils 3 are connected in series through the FPC board, the outer fixing portion 53 of one FPC board is provided with two outer soldering pads 62, and the inner fixing portion 51 is provided with two inner soldering pads 61. The two inner soldering pads 61 are paired with the two outer soldering pads 62. The other FPC board has two inner solder pads 61 that are electrically connected to each other. This FPC board has no outer solder pads 62. The leads of the voice coil 3 are soldered to the inner solder pads 61 for electrical connection. When two voice coils 3 are connected in parallel via the FPC board, each FPC board has an outer solder pad 62 on its outer fixing portion 53 and two inner solder pads 61 on its inner fixing portion 51. Both inner solder pads 61 are electrically connected to the outer solder pads 62, and the leads of the voice coil 3 are soldered to the inner solder pads 61 for electrical connection. In this embodiment, the two voice coils 3 are connected in parallel.

[0046] In order to fully utilize the space of the gap 44 , the inner fixing portion 51 has an extension portion 511 extending into the gap 44 , and the inner solder pad 61 is disposed on the extension portion 511 .

[0047] Preferably, there are two extending portions 511 , and a partial area of ​​the deformable portion 52 is located between the two extending portions 511 . The arrangement of the two extending portions 511 on the inner fixing portion 51 can make the center of gravity distribution of the inner fixing portion 51 more reasonable.

[0048] The concave magnetic structure 43 includes an outer magnetic steel 431 and an outer washer 432 . The outer washer 432 is connected to the basin frame 1 . The outer magnetic steel 431 is connected to the yoke 41 and the outer washer 432 . The outer magnetic steel 431 is concave in shape as a whole.

[0049] In order to reduce the molding waste of the outer magnetic steel 431 and save the material cost of the magnetic steel, optionally, the outer magnetic steel 431 is spliced ​​by multiple sub-magnetic steels, and the corners of the outer magnetic steel 431 spliced ​​by a plurality of the sub-magnetic steels have no empty areas. In this embodiment, the outer magnetic steel 431 is spliced ​​by two L-shaped magnetic steels.

[0050] Example 2

[0051] Please refer to Figure 4 The second embodiment of the present invention is a parallel technical solution to the first embodiment. It differs from the first embodiment in that the outer magnetic steel 431 is an integrated structure, which reduces the number of components of the sound unit and facilitates assembly and manufacturing of the sound unit. Furthermore, in this embodiment, the two voice coils 3 are connected in series.

[0052] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound unit, characterized in that: include basin rack; A vibration assembly, the vibration assembly comprising a diaphragm assembly and two voice coils, the diaphragm assembly connecting the voice coils and the basin frame; A magnetic circuit assembly comprising a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, wherein the central magnetic structures are arranged in two groups side by side, the central magnetic structures corresponding one to one with the voice coils, the side magnetic structures are disposed around the central magnetic structure, and the side magnetic structures include two groups of concave magnetic structures disposed opposite each other, with two gaps formed between the two groups of concave magnetic structures, the gaps corresponding to the gaps between the two voice coils; The supporting component includes an inner fixing portion, a deformable portion and an outer fixing portion which are sequentially connected from the inside to the outside, the outer fixing portion is connected to the basin frame, the inner fixing portion is connected to the two voice coils, and the deformable portion is located in the gap.

2. The sound unit according to claim 1, characterized in that: The magnetic poles of the two groups of central magnetic structures are oriented in opposite directions, and the magnetic poles of the central magnetic structure and the concave magnetic structure adjacent thereto are oriented in opposite directions.

3. The sound unit according to claim 1, wherein: The two voice coils are bonded to each other, or the two voice coils are arranged without contacting each other.

4. The sound unit according to claim 1, wherein: The supporting component is a secondary membrane.

5. The sound unit according to claim 1, characterized in that: The supporting component is an FPC board.

6. The sound unit according to claim 5, characterized in that: The two gaps are respectively provided with the FPC boards, the FPC boards are provided with a conducting structure, and the two voice coils are connected in series or in parallel through the FPC boards.

7. The sound unit according to claim 6, characterized in that: The conductive structure includes an inner pad, the inner fixing portion has an extension portion extending into the gap, and the inner pad is arranged on the extension portion.

8. The sound unit according to claim 7, characterized in that: There are two extending portions, and a partial area of ​​the deformation portion is located between the two extending portions.

9. The sound unit according to claim 1, characterized in that: The concave magnetic structure includes an outer magnetic steel and an outer washer. The outer magnetic steel connects the yoke and the outer washer, and the outer magnetic steel is concave in shape as a whole.

10. The sound unit according to claim 9, characterized in that: The outer magnetic steel is an integrated structure; Alternatively, the outer magnetic steel is formed by splicing a plurality of sub-magnetic steels, and the corners of the outer magnetic steel formed by splicing a plurality of sub-magnetic steels have no vacant areas.

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