Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a voice coil, a magnetic circuit assembly and a supporting part, the magnetic circuit assembly is connected with the basin stand, the magnetic circuit assembly comprises a yoke, a central magnetic structure and an edge magnetic structure, the central magnetic structure and the edge magnetic structure are respectively arranged on the yoke, the edge magnetic structure is arranged around the central magnetic structure, and a magnetic gap is formed between the edge magnetic structure and the central magnetic structure. The edge magnetic structure comprises two magnetic assemblies which are oppositely arranged and are shaped like a Chinese character'ao ', and two passing ports are formed between the two magnetic assemblies; 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 stand, the inner fixing part is connected with the voice coil, and the deformation part is located in the through opening. The four corners of the edge magnetic structure in the sound production unit do not need to avoid space, so that the size of the edge magnetic structure in the sound production unit is increased, the effective length of the magnetic gap can be increased, the BL value of the sound production unit is increased, and the performance is improved; the deformation part is located in the passing opening, and the edge magnetic structure can expand outwards, so that the size of the edge magnetic structure is increased.

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] Existing technologies often use the method of increasing the amplitude to improve the loudness of the sound unit. In order to suppress the rolling vibration of the voice coil, large-amplitude sound units generally add supporting components. However, in existing sound units, the connection points between the supporting components and the voice coil are usually located at the four corners of the voice coil. The side magnetic structure areas corresponding to the supporting components need to be designed to avoid air gaps, which will undoubtedly result in the volume of the magnetic steel of the sound unit 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

[0003] The technical problem solved by the utility model is to provide a high-performance sound-generating unit.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sound unit comprising:

[0005] basin rack;

[0006] Voice coil;

[0007] A magnetic circuit assembly connected to the basin frame, comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, wherein the side magnetic structure is provided around the central magnetic structure and forms a magnetic gap with the central magnetic structure, and the side magnetic structure comprises two concave-shaped magnetic assemblies provided facing each other, with two openings formed between the two magnetic assemblies;

[0008] 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 voice coil, and the deformable portion is located in the opening.

[0009] In one embodiment, the opening is arranged corresponding to the middle of the side of the voice coil.

[0010] In one embodiment, the supporting component is a secondary membrane.

[0011] In one embodiment, the supporting component is an FPC board.

[0012] In one embodiment, the two ports are respectively provided with the FPC boards, and at least one of the FPC boards is provided with a conductive structure, the conductive structure including an inner solder pad, a conductive trace and an outer solder pad connected in sequence, the inner solder pad is provided on the inner fixed portion and electrically connected to the voice coil, and the outer solder pad is provided on the outer fixed portion.

[0013] In one embodiment, a conducting structure is respectively provided on the two FPC boards.

[0014] In one embodiment, the inner fixing portion has an extension portion extending into the opening, and the inner solder pad is disposed on the extension portion.

[0015] 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.

[0016] In one embodiment, the magnetic assembly 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 in a concave shape as a whole.

[0017] 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.

[0018] The beneficial effects of the present invention are: the sound unit has a novel structure, strong driving force, high sensitivity, and the four corners of the side magnetic structure do not need to be kept clear, thereby increasing the volume of the side magnetic structure in the sound unit. At the same time, it can also increase the effective length of the magnetic gap, thereby increasing the BL value of the sound unit and improving the performance; moreover, the deformation part is located in the mouth, and the deformation part does not need to occupy the outer space of the side magnetic structure. Without changing the outline size of the sound unit, the side magnetic structure can be expanded outward, thereby increasing the volume of the side magnetic structure to a greater extent and improving the performance of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is an exploded view of the sound unit of the first embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 2 ;

[0023] Figure 4This is a schematic diagram of the structure of the sound unit of the second embodiment of the present invention. Figure 1 ;

[0024] Figure 5 This is a schematic diagram of the structure of the sound unit of the second embodiment of the present invention. Figure 2 .

[0025] Description of Figure Numbers:

[0026] 1. Basin rack;

[0027] 2. Voice coil; 21. Positive lead; 22. Negative lead;

[0028] 31. Yoke; 32. Center magnetic structure; 33. Side magnetic structure; 34. Magnetic assembly; 341. External magnetic steel; 342. External washer; 35. Port;

[0029] 4. Support component; 41. Internal fixing portion; 411. Extension portion; 42. Deformation portion; 43. External fixing portion;

[0030] 5. Diaphragm assembly;

[0031] 61. Inner pad; 62. Outer pad. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Example 1

[0039] Please refer to Figures 1 to 3 , the utility model embodiment 1 is: a sound unit, including a basin 1, a voice coil 2, a magnetic circuit assembly, a support component 4 and a diaphragm assembly 5, the diaphragm assembly 5 and the magnetic circuit assembly are respectively connected to the basin 1, the magnetic circuit assembly includes a yoke 31 and a central magnetic structure 32 and a side magnetic structure 33 respectively arranged on the yoke 31, the side magnetic structure 33 is arranged around the central magnetic structure 32 and forms a magnetic gap between the central magnetic structure 32, the side magnetic structure 33 includes two concave magnetic assemblies 34 arranged opposite to each other, the two Two passages 35 are formed between the magnetic components 34, and the passages 35 connect the magnetic gap; the voice coil 2 is connected to the diaphragm component 5 and is arranged corresponding to the magnetic gap; there are two supporting components 4, and the two supporting components 4 are respectively arranged corresponding to the two passages 35. The supporting components 4 include an inner fixing part 41, a deformation part 42 and an outer fixing part 43 connected in sequence from the inside to the outside, the outer fixing part 43 is connected to the basin frame 1, the inner fixing part 41 is connected to the voice coil 2, and the deformation part 42 is located in the passage 35.

[0040] The central magnetic structure 32 includes a central magnetic steel and a central washer. The central magnetic steel connects the central washer and the yoke 31 .

[0041] In order to allow the voice coil 2 to be subjected to a more balanced force, the passage 35 is arranged corresponding to the middle of the side of the voice coil 2. In this embodiment, the passage 35 is arranged corresponding to the middle of the short side of the voice coil 2. In other embodiments, the passage 35 can be arranged corresponding to the middle of the long side of the voice coil 2.

[0042] In one embodiment, the support component 4 is a secondary membrane. In this embodiment, the support component 4 is an FPC board, meaning that the two openings 35 are each provided with an FPC board. At least one of the FPC boards is provided with a conductive structure, which includes an inner solder pad 61, a conductive trace, and an outer solder pad 62, which are sequentially connected. The inner solder pad 61 is provided on the inner fixing portion 41 and electrically connected to the voice coil 2, while the outer solder pad 62 is provided on the outer fixing portion 43. Therefore, the FPC board not only corrects the deflection of the voice coil 2 but also provides electrical connection between the external power supply and the voice coil 2. In this embodiment, only one of the FPC boards is provided with the conductive structure.

[0043] In order to fully utilize the space of the through opening 35 , the inner fixing portion 41 has an extension portion 411 extending into the through opening 35 , and the inner solder pad 61 is disposed on the extension portion 411 .

[0044] Preferably, there are two extending portions 411 , and a partial area of ​​the deformable portion 42 is located between the two extending portions 411 . The arrangement of the two extending portions 411 on the inner fixing portion 41 can make the center of gravity distribution of the inner fixing portion 41 more reasonable.

[0045] The magnetic assembly 34 includes an outer magnetic steel 341 and an outer washer 342. The outer magnetic steel 341 connects the yoke 31 and the outer washer 342. The outer magnetic steel 341 is concave in shape as a whole. In a specific product, the outer magnetic steel 341 can be an integrated structure, which can facilitate the assembly of the sound unit. In order to reduce magnetic steel molding waste and save magnetic steel material costs, it is preferred that the outer magnetic steel 341 is spliced ​​from multiple sub-magnets. The corners of the outer magnetic steel 341 spliced ​​from a plurality of the sub-magnets have no vacant areas. In this embodiment, the outer magnetic steel 341 is spliced ​​from two L-shaped magnetic steels.

[0046] Example 2

[0047] Please combine Figure 4 and Figure 5The second embodiment of the present invention is a parallel technical solution to the first embodiment. It differs from the first embodiment in that two FPC boards are each provided with a conductive structure. Specifically, the positive lead 21 of the voice coil 2 is welded to one FPC board for conductive connection, while the negative lead 22 of the voice coil 2 is welded to the other FPC board for conductive connection. This ensures more balanced force on the voice coil 2 and satisfies other requirements for the placement of the external pad 62.

[0048] 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; Voice coil; A magnetic circuit assembly connected to the basin frame, comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, wherein the side magnetic structure is provided around the central magnetic structure and forms a magnetic gap with the central magnetic structure, and the side magnetic structure comprises two concave-shaped magnetic assemblies provided facing each other, with two openings formed between the two magnetic assemblies; 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 voice coil, and the deformable portion is located in the opening.

2. The sound unit according to claim 1, characterized in that: The port is arranged corresponding to the middle of the side of the voice coil.

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

4. The sound unit according to claim 1, wherein: The supporting component is an FPC board.

5. The sound unit according to claim 4, characterized in that: The two ports are respectively provided with the FPC boards, and at least one of the FPC boards is provided with a conductive structure, the conductive structure including an inner solder pad, a conductive trace and an outer solder pad connected in sequence, the inner solder pad is provided on the inner fixed portion and is electrically connected to the voice coil, and the outer solder pad is provided on the outer fixed portion.

6. The sound unit according to claim 5, characterized in that: The two FPC boards are respectively provided with a conducting structure.

7. The sound unit according to claim 5, characterized in that: The inner fixing portion has an extension portion extending into the opening, and the inner soldering 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 magnetic assembly 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 in a concave 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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