Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a vibration assembly, a magnetic circuit assembly and a centering disk, and is characterized in that the vibration assembly comprises a diaphragm assembly and a voice coil, and the diaphragm assembly is connected with the voice coil and the basin stand; the magnetic circuit assembly comprises a yoke, a center magnetic structure and side magnetic structures, the center magnetic structure and the side magnetic structures are arranged on the yoke, the side magnetic structures are arranged around the center magnetic structure and comprise annular washers and multiple pieces of side magnetic steel, the side magnetic steel is connected with the annular washers and the yoke, an avoiding opening is formed between every two adjacent pieces of side magnetic steel, and the annular washers and the side magnetic steel are arranged in the avoiding opening. The annular washer is provided with a concave table sinking into the avoiding opening. The centring disk comprises an inner fixing part, a cantilever 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 a part of area of the centring disk is located in the hollow area of the concave platform. The sound production unit is stable in structure, not easy to deform and excellent in performance. The sounding unit is novel and stable in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly to a sounding unit. Background Art

[0002] Sounding units are mostly used in electronic devices such as mobile phones and headphones, and the scenarios where they are used are mostly for calls, playing music, playing videos, etc.

[0003] In order to increase the loudness of the sounding unit, the prior art usually increases the amplitude of the sounding unit. Currently, large-amplitude sounding units generally use support components to connect the voice coil to conduct and / or suppress the roll vibration of the voice coil. At present, support components are respectively connected to the four corners of the voice coil, and the position of the edge magnetic structure corresponding to the support component needs to be cleared. The clearance design will cause the outer washer to be disconnected, resulting in a weakening of the structural strength of the outer washer. During the dropping process, the outer washer is prone to problems such as deformation. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a sounding unit with a stable structure.

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

[0006] A chassis;

[0007] A vibration assembly, the vibration assembly comprising a diaphragm assembly and a voice coil, the diaphragm assembly connecting the voice coil and the chassis;

[0008] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure and an edge magnetic structure respectively arranged on the yoke, the edge magnetic structure surrounding the central magnetic structure, the edge magnetic structure comprising an annular washer and a plurality of edge magnetic steels, the edge magnetic steels connecting the annular washer and the yoke, and an avoidance opening being formed between two adjacent edge magnetic steels, and the annular washer having a concave platform sunk into the avoidance opening;

[0009] A centering washer, the centering washer comprising an inner fixing portion, a cantilever portion and an outer fixing portion connected in sequence from inside to outside, the outer fixing portion connecting the chassis, the inner fixing portion connecting the voice coil, and a partial area of the centering washer being located in the hollow area of the concave platform.

[0010] In one embodiment, the bottom of the concave platform is fixedly connected to the yoke.

[0011] In one embodiment, the bottom of the concave platform is adhesively connected or welded to the yoke.

[0012] In one embodiment, an avoidance groove for avoiding the inner fixing portion is provided on the central magnetic structure.

[0013] In one embodiment, a partial region of the internal fixing portion is located within the hollow region of the concave platform.

[0014] In one embodiment, a partial region of the cantilever portion is located within the hollow region of the concave platform.

[0015] In one embodiment, the internal fixing portion includes a connected vertical portion and a planar portion. The bottom end of the vertical portion is connected to the cantilever portion, and the bottom surface of the planar portion is connected to the top surface of the voice coil.

[0016] In one embodiment, the number of side permanent magnets is two. The overall shape of the side permanent magnets is concave-shaped, and the two concave-shaped side permanent magnets are arranged facing each other.

[0017] In one embodiment, the number of voice coils is one. The avoidance opening is arranged corresponding to the middle of the long side of the voice coil, or the avoidance opening is arranged corresponding to the middle of the short side of the voice coil.

[0018] In one embodiment, the number of voice coils is two, and the number of central magnetic structures is two groups. The two voice coils and the two groups of central magnetic structures are arranged in one-to-one correspondence. The avoidance opening is arranged corresponding to the gap between the two voice coils, and the internal fixing portion of the centering support piece is fixedly connected to the two voice coils at the same time.

[0019] The beneficial effects of the present utility model are as follows: The structure of the present sounding unit is novel. By using an annular washer with a concave platform as the outer washer, while the sounding unit has a centering support piece, the outer washer is in the shape of a continuous and complete ring frame, improving the structural stability of the outer washer, reducing the risk of its falling and deformation, and enhancing the structural stability of the sounding unit. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is an exploded view of the sounding unit according to Embodiment 1 of the present utility model;

[0022] Figure 2 It is a cross-sectional view of the sounding unit according to Embodiment 1 of the present utility model;

[0023] Figure 3 It is a structural schematic diagram of a partial structure of the sounding unit according to Embodiment 1 of the present utility model;

[0024] Figure 4 Structural schematic diagram of a partial structure of the sound generating unit according to the second embodiment of the present utility model;

[0025] Figure 5 Structural schematic diagram of a partial structure of the sound generating unit according to the third embodiment of the present utility model.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1. Basin frame;

[0028] 2. Diaphragm assembly;

[0029] 3. Voice coil;

[0030] 41. Yoke; 42. Central magnetic structure; 421. Central magnet; 422. Central washer; 423. Avoidance groove; 43. Edge magnetic structure; 431. Annular washer; 4311. Concave platform; 432. Edge magnet; 44. Avoidance opening;

[0031] 5. Centering support piece; 51. Inner fixing part; 511. Vertical part; 512. Plane part; 52. Cantilever part; 53. Outer fixing part;

[0032] 6. Skeleton. Detailed implementation manners

[0033] The realization of the object, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0037] In addition, the meaning of "and / or" as it appears throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes Solution A, or Solution B, or the solution that satisfies both simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] In this application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Embodiment 1

[0040] Please refer to Figures 1 to 3 , Embodiment 1 of this utility model is as follows: A sound generating unit, comprising a chassis 1, a vibration assembly, a magnetic circuit assembly, and a centering washer 5. The vibration assembly includes a diaphragm assembly 2 and a voice coil 3. The diaphragm assembly 2 connects the voice coil 3 and the chassis 1; the magnetic circuit assembly includes a yoke 41 and a central magnetic structure 42 and an edge magnetic structure 43 respectively provided on the yoke 41. The central magnetic structure 42 is arranged corresponding to the hollow area of the voice coil 3. The central magnetic structure 42 includes a central magnet 421 and a central spacer 422. The central magnet 421 connects the central spacer 422 and the yoke 41. The edge magnetic structure 43 surrounds the central magnetic structure 42. The edge magnetic structure 43 includes an annular spacer 431 and a plurality of edge magnets 432. The edge magnets 432 connect the annular spacer 431 and the yoke 41. An avoidance opening 44 is formed between two adjacent edge magnets 432. The annular spacer 431 has a concave platform 4311 that sinks into the avoidance opening 44. Optionally, the concave platform 4311 is a stamping structure formed by stamping; the centering washer 5 includes an inner fixing portion 51, a cantilever portion 52, and an outer fixing portion 53 that are connected in sequence from the inside out. The outer fixing portion 53 connects the chassis 1, and the inner fixing portion 51 connects the voice coil 3. A partial area of the centering washer 5 is located within the hollow area of the concave platform 4311.

[0041] To improve the structural stability of the sound generating unit to a greater extent, it is preferred that the bottom of the concave platform 4311 is fixedly connected to the yoke 41. The connection method of fixedly connecting the bottom of the concave platform 4311 to the yoke 41 includes but is not limited to adhesive connection, welding, etc.

[0042] Part of the inner fixing portion 51 is located in the hollow area of the concave platform 4311. At this time, the inner fixing portion 51 does not occupy the installation space of the central magnetic structure 42, so that the sound generating unit has better performance.

[0043] Specifically, an inner pad is provided on the inner fixing portion 51, an outer pad electrically connected to the inner pad is provided on the outer fixing portion 53, and the lead of the voice coil 3 is welded to the inner pad. In this embodiment, the inner pad is located in the hollow area of the concave platform 4311, so that the inner pad does not need to occupy the installation space of the magnet, making the internal space of the sound generating unit more reasonably utilized.

[0044] In this embodiment, the number of the side magnets 432 is two, and the overall shape of the side magnets 432 is concave. The two concave-shaped side magnets 432 are arranged facing each other. The concave-shaped side magnets 432 can be either an integral structure or composed of a plurality of sub-magnets arranged and combined. When the side magnets 432 are composed of a plurality of sub-magnets arranged and combined, there is no gap connecting the inner and outer sides of the adjacent sub-magnets. That is to say, there is no gap at the end corners of the side magnets 432 composed of a plurality of sub-magnets arranged and combined. In this way, the total volume of the side magnets 432 can be set larger, thereby increasing the B value of the sound generating unit.

[0045] Preferably, the two side magnets 432 are of a symmetric structure, that is to say, the sizes of the two side magnets 432 are exactly the same.

[0046] In this embodiment, the number of the voice coils 3 is two, and the number of the central magnetic structures 42 is two groups. The two voice coils 3 are arranged in one-to-one correspondence with the two groups of central magnetic structures 42. The avoidance opening 44 is arranged corresponding to the gap between the two voice coils 3. The inner fixing portion 51 of the centering washer 5 is fixedly connected to the two voice coils 3 at the same time.

[0047] To further improve the structural stability of the sound generating unit and improve the split vibration phenomenon of the vibration assembly, the mutually approaching sides of the two voice coils 3 are adhesively bonded to each other.

[0048] In this embodiment, the magnetic poles of the two side magnets 432 face in opposite directions, the magnetic poles of the two central magnets 421 face in opposite directions, and the magnetic poles of the central magnetic structure 42 and the adjacent side magnet 432 face in opposite directions. That is, when the bottom end of one side magnet 432 is an N pole, the bottom end of the central magnet 421 that sinks into its hollow region is an S pole, the bottom end of the other central magnet 421 is an N pole, and the bottom end of the other side magnet 432 is an S pole.

[0049] Optionally, it further includes a skeleton 6. The skeleton 6 connects the diaphragm assembly 2 and the voice coil 3. That is to say, the voice coil 3 is indirectly connected to the diaphragm assembly 2 through the skeleton 6.

[0050] Embodiment Two

[0051] Please refer to Figure 4 , Embodiment Two of the present utility model is a parallel technical solution to Embodiment One. The difference from Embodiment One is that a partial area of the cantilever portion 52 is located in the hollow region of the concave platform 4311. This can increase the total length of the cantilever portion 52, enabling the sound generating unit to vibrate with a larger amplitude, so that a greater loudness can be achieved when the sound generating unit works.

[0052] Furthermore, in this embodiment, the inner fixing portion 51 includes a connected vertical portion 511 and a planar portion 512. The bottom end of the vertical portion 511 is connected to the cantilever portion 52, the bottom surface of the planar portion 512 is connected to the top surface of the voice coil 3, and an inner pad is provided on the bottom surface of the planar portion 512 and inside the voice coil 3. Preferably, the vertical portion 511 is fixedly connected to the outer wall surface of the voice coil 3, thereby effectively improving the connection stability between the voice coil 3 and the centering support piece 5 and improving the structural stability of the sound generating unit.

[0053] To avoid collision between the planar portion 512 extending into the inner side of the voice coil 3 and the central magnetic structure 42, an avoidance groove 423 for avoiding the inner fixing portion 51 is provided on the central magnetic structure 42. Optionally, the avoidance groove 423 is provided on the central washer 422, which can avoid the avoidance groove 423 occupying the setting space of the central magnet 421 and is beneficial to ensuring the performance of the sound generating unit.

[0054] Embodiment Three

[0055] Please refer to Figure 5 , Embodiment Three of the present utility model is a parallel technical solution to Embodiment One. The difference from Embodiment One is that the number of voice coils 3 is only one. In this embodiment, the avoidance opening 44 is provided corresponding to the middle of the short side of the voice coil 3. In other embodiments, the avoidance opening 44 can also be provided corresponding to the middle of the long side of the voice coil 3.

[0056] In this embodiment, the magnetic poles of the two side magnets 432 face the same direction, and the magnetic pole of the central magnet 421 faces the opposite direction to that of the side magnets 432. That is, when the bottom end of one side magnet 432 is an N pole, the bottom end of the central magnet 421 is an S pole, and the bottom end of the other side magnet 432 is an N pole.

[0057] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. Sound generating unit, characterized in that: including a chassis; a vibration assembly, the vibration assembly including a diaphragm assembly and a voice coil, the diaphragm assembly connecting the voice coil to the chassis; a magnetic circuit assembly, the magnetic circuit assembly including a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, the side magnetic structure surrounding the central magnetic structure, the side magnetic structure including an annular washer and a plurality of side magnetic steel, the side magnetic steel connecting the annular washer to the yoke, an avoidance opening being formed between two adjacent side magnetic steel, the annular washer having a concave platform sunken into the avoidance opening; a centering washer, the centering washer including an inner fixing portion, a cantilever portion and an outer fixing portion sequentially connected from the inside out, the outer fixing portion connecting to the chassis, the inner fixing portion connecting to the voice coil, and a partial area of the centering washer being located in the hollow area of the concave platform.

2. The sound generating unit according to claim 1, wherein: The bottom of the concave platform is fixedly connected to the yoke.

3. The sound generating unit according to claim 2, wherein: The bottom of the concave platform is adhesively connected or welded to the yoke.

4. The sound generating unit according to claim 1, wherein: An avoidance groove for avoiding the inner fixing portion is provided on the central magnetic structure.

5. The sound generating unit according to claim 1, wherein: A partial area of the inner fixing portion is located in the hollow area of the concave platform.

6. The sound generating unit according to claim 1, wherein: A partial area of the cantilever portion is located in the hollow area of the concave platform.

7. The sound generating unit according to claim 6, characterized in that: The inner fixing portion includes a vertical portion and a planar portion connected to each other, the bottom end of the vertical portion connecting to the cantilever portion, and the bottom surface of the planar portion connecting to the top surface of the voice coil.

8. The sound generating unit according to claim 1, characterized in that: The number of the side magnetic steel is two, the side magnetic steel is integrally concave-shaped, and the two concave-shaped side magnetic steel are arranged facing each other.

9. The sound generating unit according to claim 8, wherein: The number of the voice coils is one, the avoidance opening is disposed corresponding to the middle of the long side of the voice coil, or the avoidance opening is disposed corresponding to the middle of the short side of the voice coil.

10. The sound generating unit according to claim 8, wherein: The number of the voice coils is two, the number of the central magnetic structures is two groups, the two voice coils and the two groups of central magnetic structures are arranged in one-to-one correspondence, the avoidance opening is disposed corresponding to the gap between the two voice coils, and the inner fixing portion of the centering washer is fixedly connected to the two voice coils at the same time.

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