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, and a central structural member, central magnetic structures and side magnetic structures which are respectively arranged on the yoke, the two groups of central magnetic structures are arranged side by side, the central magnetic structures are in one-to-one correspondence with the voice coils, the side magnetic structures are arranged around the central magnetic structures, and each side magnetic structure comprises two groups of concave magnetic structures which are oppositely arranged; two gaps are formed between the two sets of concave magnetic structures, the central structural member is located between the two sets of central magnetic structures, the gaps correspond to the central structural member, and the central structural member is a magnetic conductive structural member and / or a permanent magnetic structural member; the supporting component 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 stand, 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 and excellent 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-generating unit, comprising:

[0006] basin rack;

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

[0008] A magnetic circuit assembly, comprising a yoke and a central structural member, a central magnetic structure, and a side magnetic structure, each of which is respectively provided on the yoke. The central magnetic structures are two groups arranged side by side, each corresponding to the voice coil one by one. The side magnetic structures are arranged around the central magnetic structure. The side magnetic structures include two groups of concave magnetic structures arranged opposite to each other, with two gaps formed between the two groups of concave magnetic structures. The central structural member is located between the two groups of central magnetic structures, and the gaps are provided corresponding to the central structural member. The central structural member is a magnetic conductive structural member and / or a permanent magnetic structural member.

[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 central structural member includes a central magnetic steel and a central washer, and the central magnetic steel connects the central washer and the yoke.

[0011] In one embodiment, the central structural member is a magnetic conductive structural member, and the central structural member and the yoke are an integrally formed one-piece structure.

[0012] In one embodiment, a reinforcement block is provided on the inner fixing portion, and at least a portion of the reinforcement block is located between the two voice coils.

[0013] In one embodiment, the supporting component is a secondary membrane.

[0014] In one embodiment, the supporting component is an FPC board.

[0015] In one embodiment, the two gaps are respectively provided with the FPC boards, and the FPC boards are provided with a conductive structure, which includes an inner solder pad provided on the inner fixing portion, and the inner solder pad is used to conduct the voice coil, and the two voice coils are connected in series or in parallel.

[0016] In one embodiment, the inner fixing portion has an extension portion extending into the gap, and the inner solder pad is disposed on the extension portion.

[0017] 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.

[0018] 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, the outer magnetic steel is concave in shape as a whole, and the outer magnetic steel is an integrated structure;

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] The presence of the central structural member can further increase the magnetic field / magnetic conductivity of the sound unit, thereby further improving the performance of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 This is an exploded view of the sound unit of the first embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 1 ;

[0027] Figure 3 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 2 ;

[0028] Figure 4 This is a cross-sectional view of the sound unit of the first embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a portion of the sound-emitting unit according to the second embodiment of the present invention;

[0030] Figure 6 This is a cross-sectional view of the sound unit of the third embodiment of the present invention.

[0031] Description of Figure Numbers:

[0032] 1. Basin rack;

[0033] 2. Diaphragm assembly;

[0034] 3. Voice coil;

[0035] 41. Yoke; 42. Central magnetic structure; 43. Concave magnetic structure; 431. External magnetic steel; 432. External washer; 44. Gap; 45. Central structural member;

[0036] 5. Supporting member; 51. Internal fixing portion; 511. Extending portion; 52. Deformable portion; 53. External fixing portion;

[0037] 61, inner pad; 62, outer pad;

[0038] 7. Reinforcement block. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Example 1

[0046] Please refer to Figures 1 to 4, the utility model embodiment 1 is: a sound unit, including a basin 1, a vibration component, a magnetic circuit component and a supporting component 5, the vibration component includes a diaphragm component 2 and two voice coils 3, the diaphragm component 2 connects the voice coil 3 and the basin 1, and there is a gap between the two voice coils 3; the magnetic circuit component includes a yoke 41 and a central structural member 45, a central magnetic structure 42 and a side magnetic structure respectively arranged 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, the side magnetic structure is connected to the basin 1, the side magnetic structure is arranged around the central magnetic structure 42, and the side magnetic structure includes two groups arranged oppositely. A concave magnetic structure 43, two gaps 44 are formed between the two groups of the concave magnetic structures 43, the central structural member 45 is located between the two groups of the central magnetic structures 42, and the gap 44 is arranged corresponding to the central structural member 45, and the central structural member 45 is a magnetic conductive structural member and / or a permanent magnetic structural member; the supporting component 5 includes 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. There are two supporting components 5, and the two supporting components 5 are arranged in a one-to-one correspondence with the two gaps 44.

[0047] The central magnetic structure 42 includes a central magnetic steel and a central washer. The central magnetic steel connects the central washer to the yoke 41. The two sets of central magnetic structures 42 have the same magnetic pole orientation. The two sets of concave magnetic structures 43 have the same magnetic pole orientation. The magnetic pole orientation of the central magnetic structure 42 is opposite to that of the concave magnetic structure 43.

[0048] In this embodiment, the central structural member 45 includes a central magnetic steel and a central washer. The central magnetic steel connects the central washer and the yoke 41. The magnetic poles of the central magnetic steel are oriented oppositely to the magnetic poles of the central magnetic structure 42. In other embodiments, the central structural member 45 may include only the central magnetic steel without the central washer. In this case, the central structural member 45 is a permanent magnetic structural member.

[0049] 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 boards. The FPC board is provided with a conducting structure. The conducting structure includes an inner solder pad 61 provided on the inner fixing portion 51. The inner solder pad 61 is used to conduct the voice coil 3. 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, two outer solder pads 62 are provided on the outer fixing portion 53 of one FPC board, and two inner solder pads 61 are provided on the inner fixing portion 51. , the two inner solder pads 61 are connected to the two outer solder pads 62 in a one-to-one correspondence, the other FPC board is provided with two inner solder pads 61 that are connected to each other, and the FPC board has no outer solder pads 62, and the leads of the voice coil 3 are welded and connected to the inner solder pads 61; when the two voice coils 3 are connected in parallel through the FPC board, each of the outer fixing parts 53 of the FPC board is provided with an outer solder pad 62, and the inner fixing part 51 is provided with two inner solder pads 61, and the two inner solder pads 61 are both connected to the outer solder pads 62, and the leads of the voice coil 3 are welded and connected to the inner solder pads 61.

[0050] 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 .

[0051] 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.

[0052] 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.

[0053] To reduce molding waste from the outer magnetic steel 431 and save on magnetic material costs, the outer magnetic steel 431 can optionally be constructed from multiple sub-magnets. This arrangement leaves no gaps at the corners of the outer magnetic steel 431. In this embodiment, the outer magnetic steel 431 is constructed from two L-shaped magnets. In other embodiments, a one-piece outer magnetic steel 431 is also acceptable. This reduces the number of components in the sound unit and facilitates assembly and manufacturing of the sound unit.

[0054] Example 2

[0055] Please refer to Figure 5The second embodiment of the present invention is a further improvement made on the basis of the first embodiment. The difference from the first embodiment is that a reinforcing block 7 is provided on the inner fixing portion 51. At least a part of the reinforcing block 7 is located between the two voice coils 3. The provision of the reinforcing block 7 can improve the structural strength of the inner fixing portion 51, improve the phenomenon of asynchronous vibration of the two voice coils 3, and thus improve the stability of the vibration assembly.

[0056] Example 3

[0057] Please refer to Figure 6 Embodiment 3 of the present invention is a parallel technical solution of embodiment 1, and is different from embodiment 1 in that: the central structural member 45 is a magnetic conductive structural member, which cannot form a magnetic field by itself, and only has a magnetic conductive effect. At this time, it is preferred that the central structural member 45 and the yoke 41 are an integrally processed and formed one-piece structure. For example, the central structural member 45 is a flange formed by bending a part of the yoke 41, or the central structural member 45 is a boss formed on the yoke 41, etc.

[0058] 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, comprising a diaphragm assembly and two voice coils, wherein the diaphragm assembly connects the voice coils and the basin frame; A magnetic circuit assembly, comprising a yoke and a central structural member, a central magnetic structure, and a side magnetic structure, each of which is respectively provided on the yoke. The central magnetic structures are two groups arranged side by side, each corresponding to the voice coil one by one. The side magnetic structures are arranged around the central magnetic structure. The side magnetic structures include two groups of concave magnetic structures arranged opposite to each other, with two gaps formed between the two groups of concave magnetic structures. The central structural member is located between the two groups of central magnetic structures, and the gaps are provided corresponding to the central structural member. The central structural member is a magnetic conductive structural member and / or a permanent magnetic structural member. 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 central structural member includes a central magnetic steel and a central washer, and the central magnetic steel connects the central washer and the yoke.

3. The sound unit according to claim 1, wherein: The central structural component is a magnetic conductive structural component, and the central structural component and the yoke are an integral structure formed by integral processing.

4. The sound unit according to claim 1, wherein: A reinforcement block is provided on the inner fixing portion, and at least a portion of the reinforcement block is located between the two voice coils.

5. The sound unit according to claim 1, characterized in that: The supporting component is a secondary membrane.

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

7. The sound unit according to claim 6, characterized in that: The two gaps are respectively provided with the FPC boards, and the FPC boards are provided with a conducting structure, which includes an inner solder pad provided on the inner fixing portion, and the inner solder pad is used to conduct the voice coils, and the two voice coils are connected in series or in parallel.

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

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

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