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 two groups of central magnetic structures and side magnetic structures which are arranged on the yoke respectively, the central magnetic structures are arranged side by side and correspond to the voice coils one by one, the side magnetic structures are arranged around the central magnetic structures and comprise two groups of concave magnetic structures which are oppositely arranged, and two gaps are formed between the two groups of concave magnetic structures; the gap is arranged corresponding to a gap between the two voice coils; the supporting part comprises a connecting part, inner fixing parts, a deformation part and an outer fixing part, the two ends of the connecting part are connected with the inner fixing parts respectively, the connecting part and the inner fixing parts are fixedly connected with the two voice coils, the deformation part is located in the gap and connected with the inner fixing parts and the outer fixing part, and the outer fixing part is fixedly connected with the basin stand. The sounding unit is stable 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 rolling vibrations in the voice coil assembly, the speaker unit typically incorporates a support component. However, in existing speaker units, the connection between the support component and the voice coil assembly is typically located at the four corners of the voice coil assembly, requiring a design that avoids air gaps in the area surrounding the support component's magnetic structure. This inevitably prevents the speaker unit's magnet volume from being increased, nor does it increase the effective magnetic gap length, making it difficult to improve the speaker unit's performance. Furthermore, the connection area between the support component and the voice coil assembly is relatively small, resulting in a weak bond between the two. Utility Model Content

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

[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 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 a connecting portion, an internal fixing portion, a deformable portion and an external fixing portion, wherein both ends of the connecting portion are respectively connected to the internal fixing portion, the connecting portion and the internal fixing portion are both fixedly connected to the two voice coils, the deformable portion is located in the gap, the deformable portion connects the internal fixing portion and the external fixing portion, and the external fixing portion is fixedly connected to the basin frame.

[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 connecting portion connects to the bottom surface of the voice coil.

[0012] In one embodiment, the connecting portion is in a shape of a reversed C rotated 90° clockwise as a whole. The connecting portion includes a horizontal portion and a vertical portion connecting the inner fixing portion. The two ends of the horizontal portion are respectively connected with the vertical portions. The bottom surface of the horizontal portion connects to the top surface of the voice coil, and the top surface of the horizontal portion connects to the diaphragm assembly.

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

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

[0015] In one embodiment, a conduction structure is provided on the FPC board, and the two voice coils are connected in series or in parallel through the FPC board.

[0016] In one embodiment, the conduction structure includes an inner pad for conducting the voice coil. The inner fixing portion has an extending portion extending into the gap, and the inner pad is provided on the extending portion.

[0017] In one embodiment, the number of the extending portions is two, and a partial area of the deformation portion is located between the two extending portions.

[0018] In one embodiment, the concave magnetic structure includes an outer magnet and an outer washer. The outer magnet connects the yoke and the outer washer. The outer magnet is in a concave shape as a whole, and the outer magnet is an integral structure.

[0019] Alternatively, the outer magnet is formed by splicing a plurality of sub-magnets, and there is no vacant area at the corners of the outer magnet formed by splicing the plurality of sub-magnets.

[0020] The beneficial effects of the present utility model are as follows: The structure of the present sound generating unit is novel. There is no need to avoid empty spaces at the four corners of the edge magnetic structure, so that the volume of the edge magnetic structure in the sound generating unit can be increased, thereby increasing the B value of the sound generating unit. At the same time, the effective length of the magnetic gap can also be increased, that is, the L value of the sound generating unit is increased. After the BL value of the sound generating unit is increased, the performance of the sound generating unit can also be significantly improved.

[0021] The deformation portion is located within the gap. The deformation portion does not need to occupy the peripheral space of the edge magnetic structure. Without changing the contour size of the sound generating unit, the edge magnetic structure can be expanded outwards, so as to increase the volume of the edge magnetic structure to a greater extent and improve the performance of the sound generating unit.

[0022] The sound generating unit adopts a dual voice coil architecture, which can effectively improve the driving force, enabling the sound generating unit to achieve large amplitude, high loudness and high sensitivity.

[0023] The use of an integrated support component not only increases the connection area between the support component and the voice coil, thereby improving the structural stability of the sound unit, but also reduces the number of parts of the sound unit compared to the method of providing support components at both ends of the voice coil assembly, thereby facilitating the assembly and manufacturing 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 schematic structural diagram of a portion of the sound-emitting unit according to the second embodiment of the present invention;

[0029] Figure 5 This is a cross-sectional view of the sound unit of the second embodiment of the present invention;

[0030] Figure 6 This is a structural diagram of the supporting component in the sound unit of the second embodiment of the present utility model.

[0031] Description of Figure Numbers:

[0032] 1. Basin rack;

[0033] 2. Diaphragm assembly;

[0034] 3. Voice coil;

[0035] 41. Yoke; 42. Center magnetic structure; 43. Concave magnetic structure; 431. External magnetic steel; 432. External washer; 44. Gap;

[0036] 5. Supporting member; 51. Internal fixing portion; 511. Extending portion; 52. Deformable portion; 53. External fixing portion; 54. Connecting portion; 541. Horizontal portion; 542. Vertical portion;

[0037] 61. Second inner pad; 62. Outer pad. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Example 1

[0045] Please refer to Figures 1 to 3 , Embodiment 1 of the present invention is: a sound unit, including a basin 1, a vibration component, a magnetic circuit component and a supporting component 5, the vibration component including a diaphragm component 2 and two voice coils 3, the diaphragm component 2 connecting the voice coil 3 and the basin 1; the magnetic circuit component includes a yoke 41 and 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 arranged around the central magnetic structure 42, the side magnetic structure includes two groups of concave magnetic structures 43 arranged opposite to each other, two gaps 44 are formed between the two groups of concave magnetic structures 43, and the gaps 44 correspond to the two A gap is set between the voice coils 3; the supporting component 5 includes a connecting part 54, an internal fixing part 51, a deforming part 52 and an external fixing part 53, and the two ends of the connecting part 54 are respectively connected to the internal fixing part 51, and the connecting part 54 and the internal fixing part 51 are both fixedly connected to the two voice coils 3. In this embodiment, the connecting part 54 is connected to the bottom surface of the voice coil 3, that is, the connecting part 54 is located below the voice coil 3; the deforming part 52 is located in the gap 44, and the two deforming parts 52 correspond to the two gaps 44 one by one. The deforming part 52 connects the internal fixing part 51 and the external fixing part 53, and the external fixing part 53 is fixedly connected to the basin frame 1.

[0046] 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 .

[0047] 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.

[0048] 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.

[0049] In one embodiment, the supporting component 5 is a secondary diaphragm. In this embodiment, the supporting component 5 is an FPC board. Specifically, the FPC board is provided with a conductive structure. The two voice coils 3 are connected in series or in parallel via the FPC board. When the two voice coils 3 are connected in series via the FPC board, the connecting portion 54 has a transition trace arranged along its length. The transition trace has first inner pads at each end, one of which is connected to one voice coil 3, and the other is connected to the other voice coil 3. The two inner fixing portions 51 are respectively provided with second inner pads 61, and the two outer fixing portions 53 are respectively provided with outer pads 62. The outer pads 62 are connected to the adjacent second inner pads 61 for conductive connection, and the second inner pads 61 are welded and conductive to the voice coils 3.

[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 second 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 the amount of waste from the outer magnetic steel 431 and save on 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, the outer magnetic steel 431 can be an integrated structure, which 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 Figures 4 to 6 The second embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that: the connecting portion 54 is in the shape of a Chinese character rotated 90° clockwise, and the connecting portion 54 includes a horizontal portion 541 and a vertical portion 542 connected to the internal fixing portion 51, and the two ends of the horizontal portion 541 are respectively connected to the vertical portion 542, the bottom surface of the horizontal portion 541 is connected to the top surface of the voice coil 3, and the top surface of the horizontal portion 541 is connected to the diaphragm assembly 2.

[0056] 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: including a chassis; a vibration component, the vibration component including a diaphragm component and two voice coils, the diaphragm component connecting the voice coils to the chassis; a magnetic circuit component, the magnetic circuit component including a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, the central magnetic structure being two sets arranged side by side, the central magnetic structure corresponding to the voice coils one by one, the side magnetic structure surrounding the central magnetic structure, the side magnetic structure including two sets of concave magnetic structures arranged facing each other, two gaps being formed between the two sets of concave magnetic structures, the gaps being arranged corresponding to the gaps between the two voice coils; a support component, the support component including a connecting portion, an inner fixing portion, a deformation portion and an outer fixing portion, the two ends of the connecting portion being respectively connected with the inner fixing portion, the connecting portion and the inner fixing portion being both fixedly connected with the two voice coils, the deformation portion being located in the gaps, the deformation portion connecting the inner fixing portion and the outer fixing portion, the outer fixing portion being fixedly connected with the chassis.

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

3. The sound unit according to claim 1, wherein: The connecting portion connects the bottom surface of the voice coil.

4. The sound unit according to claim 1, wherein: The connecting portion is integrally a C-shaped structure rotated 90° clockwise, the connecting portion including a horizontal portion and a vertical portion connecting the inner fixing portion, the two ends of the horizontal portion being respectively connected with the vertical portion, the bottom surface of the horizontal portion connecting the top surface of the voice coil, the top surface of the horizontal portion connecting the diaphragm component.

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

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

7. The sound unit according to claim 6, characterized in that: A conduction structure is provided on the FPC board, and the two voice coils are connected in series or in parallel through the FPC board.

8. The sound unit according to claim 7, characterized in that: The conduction structure includes an inner pad for conducting the voice coil, the inner fixing portion having an extension portion extending into the gaps, and the inner pad being disposed on the extension portion.

9. The sound unit according to claim 8, characterized in that: The number of the extension portions is two, and a partial area of the deformation portion is located between the two extension 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, the outer magnetic steel connecting the yoke and the outer washer, the outer magnetic steel being integrally concave-shaped, and the outer magnetic steel being an integral structure; alternatively, the outer magnetic steel is formed by splicing a plurality of sub-magnetic steels, and there is no vacant area at the corners of the outer magnetic steel formed by splicing the plurality of sub-magnetic steels.

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