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 center magnetic structures and side magnetic structures which are respectively arranged on the yoke, the two groups of center magnetic structures are arranged side by side and are in one-to-one correspondence with the voice coils, the side magnetic structures are arranged around the center magnetic structures, each side magnetic structure comprises two groups of concave magnetic structures which are oppositely arranged, and a gap is formed between the two groups of concave magnetic structures; the gap is arranged corresponding to a gap between the two voice coils; one end of the supporting part is connected with the basin frame, and the other end of the supporting part passes through the gap and is connected with the two voice coils. The sound production unit is novel in structure, adopts a double-voice-coil framework, and is excellent in performance; the central magnetic structure does not need to be provided with an avoiding structure for avoiding the inner fixing part, so that the central magnetic structure can be conveniently processed and manufactured.

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] Sound units are mostly used in electronic devices such as mobile phones and headphones, and are mostly used for making calls, playing music, playing videos, etc.

[0003] To improve magnetic steel utilization and provide drivers with stronger driving force and louder sound, a dual-voice coil design is now available on the market. To enhance the sensitivity of drivers with dual-voice coil architectures, support components are connected to the four corners of the voice coil assembly. The side magnet structure's corresponding support components must be free of air. This prevents the side magnet structure from increasing in size, and also prevents the effective magnetic gap length of the magnetic circuit assembly from being increased. Consequently, the driver's BL value remains difficult to improve, resulting in unsatisfactory performance. Utility Model Content

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

[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 a gap formed between the two groups of concave magnetic structures, the gap corresponding to the gap between the two voice coils;

[0009] A supporting component, one end of which is connected to the basin frame, and the other end of which passes through the gap and is connected to the two voice coils.

[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 side 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 support member includes a centering tab, the centering tab includes an outer fixing portion, a cantilever portion, and an inner fixing portion that are connected in sequence from outside to inside. The outer fixing portion is connected to the chassis, the inner fixing portion is connected to the voice coil, and a partial area of the inner fixing portion is located in the gap.

[0013] In one embodiment, an inner pad is provided on the inner fixing portion, an outer pad electrically connected to the inner pad is provided on the outer fixing portion, the inner pad is located in the gap, and the lead of the voice coil is welded to the inner pad.

[0014] In one embodiment, the number of centering tabs is two, two inner pads and two outer pads are provided on the centering tabs, the two inner pads and the two outer pads on the same centering tab are connected in one-to-one correspondence, and the two inner pads on the same centering tab are respectively electrically connected to the two voice coils.

[0015] In one embodiment, a partial area of the cantilever portion is located in the gap.

[0016] In one embodiment, the support member further includes an elastic auxiliary film, and the elastic auxiliary film connects the inner fixing portion and the outer fixing portion.

[0017] In one embodiment, the support member is an elastic auxiliary film.

[0018] In one embodiment, two groups of the concave magnetic structures are symmetrically arranged.

[0019] The beneficial effects of the present utility model are as follows: The structure of the present sounding unit is novel, and there is no need to avoid empty space at the four corners of the edge magnetic structure, so that the volume of the edge magnetic structure in the sounding unit can be increased, thereby increasing the B value of the sounding unit. At the same time, the effective length of the magnetic gap can also be increased, that is, the L value of the sounding unit is increased. After the BL value of the sounding unit is increased, the performance of the sounding unit can also be significantly improved.

[0020] A partial area of the inner fixing portion is located in the gap between the two groups of concave magnetic structures, which can prevent the inner fixing portion from invading the installation space of the central magnetic structure. There is no need to provide an avoidance structure for the central magnetic structure to avoid the inner fixing portion, which is convenient for the processing and manufacturing of the central magnetic structure.

[0021] The sounding unit adopts a dual voice coil structure, which can effectively improve the driving force, so that the sounding unit can achieve large amplitude and large loudness Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Explosion diagram of the sound generating unit of Embodiment 1 of the present invention;

[0024] Figure 2 Structural schematic of a part of the sound generating unit of Embodiment 1 of the present invention Figure 1 ;

[0025] Figure 3 Structural schematic of a part of the sound generating unit of Embodiment 1 of the present invention Figure 2 ;

[0026] Figure 4 Structural schematic diagram of a part of the sound generating unit of Embodiment 2 of the present invention.

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Basin frame;

[0029] 2. Diaphragm assembly;

[0030] 3. Voice coil; 31. Lead wire;

[0031] 41. Yoke; 42. Central magnetic structure; 421. Central magnet; 422. Central washer; 43. Concave magnetic structure; 431. Edge magnet; 432. Edge washer; 44. Gap;

[0032] 5. Centering support; 51. Outer fixing part; 52. Cantilever part; 53. Inner fixing part;

[0033] 6. Skeleton. Detailed implementation manners

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

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present utility model involve directional indications such as up, down, left, right, front, back..., the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a 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 descriptions such as "first" and "second" are involved 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.

[0038] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution, or the solution, 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 is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "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 communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0040] Embodiment 1

[0041] Please refer to Figures 1 to 3, Embodiment 1 of the present utility model is as follows: A sounding unit, comprising a chassis 1, a vibration assembly, a magnetic circuit assembly, and a support member. The vibration assembly includes a diaphragm assembly 2 and two voice coils 3. The two voice coils 3 are arranged side by side. The diaphragm assembly 2 connects the voice coils 3 and the chassis 1. The magnetic circuit assembly includes a yoke 41, a central magnetic structure 42 and a side magnetic structure respectively arranged on the yoke 41. The number of the central magnetic structures 42 is two groups. The two groups of central magnetic structures 42 are arranged side by side. The central magnetic structures 42 correspond to the voice coils 3 one by one. The side magnetic structure surrounds the central magnetic structure 42. The side magnetic structure includes two groups of concave magnetic structures 43 arranged oppositely. A gap 44 is formed between the two groups of concave magnetic structures 43. The gap 44 is arranged corresponding to the gap between the two voice coils 3. One end of the support member is connected to the chassis 1, and the other end of the support member passes through the gap 44 and is connected to the two voice coils 3.

[0042] In some embodiments, the two voice coils 3 are arranged without contact with each other. At this time, there is an obvious gap between the two voice coils 3. In this embodiment, the two voice coils 3 are bonded to each other, so as to improve the structural stability of the vibration assembly and improve the splitting vibration phenomenon of the vibration assembly.

[0043] The two groups of concave magnetic structures 43 are symmetrically arranged. That is to say, the two groups of concave magnetic structures 43 form a symmetric structure. Specifically, the concave magnetic structure 43 includes a side magnet 431 and a side washer 432. The side magnet 431 connects the yoke 41 and the side washer 432. The side magnet 431 and the side washer 432 are respectively in a concave shape. The side magnet 431 in a concave shape can be either an integral structure or composed of a plurality of sub-magnets arranged and combined. There is no gap connecting the inner and outer sides of the sub-magnets between adjacent two sub-magnets. In other words, there is no gap at the end corners of the side magnet 431 composed of a plurality of sub-magnets arranged and combined.

[0044] The magnetic poles of the two groups of concave magnetic structures 43 face in opposite directions. That is to say, when the bottom end of one side magnet 431 is an S pole, the bottom end of the other side magnet 431 is an N pole.

[0045] The magnetic poles of the central magnetic structure 42 and the adjacent side magnetic structure face in opposite directions. The central magnetic structure 42 includes a central magnet 421 and a central washer 422. The central magnet 421 connects the central washer 422 and the yoke 41. The magnetic pole orientation of the central magnet 421 is opposite to that of the adjacent side magnet 431. That is, when the bottom end of one central magnet 421 is an N pole, the bottom end of the adjacent side magnet 431 is an S pole, and the bottom end of the other central magnet 421 is an S pole.

[0046] Optionally, the sound generating unit further includes a skeleton 6, which is respectively connected to 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. The diaphragm assembly 2 includes a sounding film and a dome provided on the sounding film. In this embodiment, the overall shape of the skeleton 6 is in the shape of a Chinese character 'ri'.

[0047] In other embodiments, the supporting member may be an elastic auxiliary film, and the material of the elastic auxiliary film may be the same as or different from that of the sounding film. In some other embodiments, the supporting member includes a centering support piece 5, which includes an outer fixing portion 51, a cantilever portion 52, and an inner fixing portion 53 that are connected in sequence from the outside to the inside. The outer fixing portion 51 is connected to the speaker frame 1, the inner fixing portion 53 is connected to the voice coil 3, and a partial area of the inner fixing portion 53 is located in the gap 44. Preferably, an inner pad is provided on the inner fixing portion 53, an outer pad electrically connected to the inner pad is provided on the outer fixing portion 51, the inner pad is located in the gap 44, and the lead 31 of the voice coil 3 is welded to the inner pad.

[0048] Specifically, the number of the centering support pieces 5 is two. Two inner pads and two outer pads are provided on the centering support piece 5. The two inner pads and the two outer pads on the same centering support piece 5 are correspondingly connected one by one, and the two inner pads on the same centering support piece 5 are electrically connected to the two voice coils 3 respectively.

[0049] To enable the supporting member to provide greater supporting force, optionally, the supporting member further includes an elastic auxiliary film, which connects the inner fixing portion 53 and the outer fixing portion 51.

[0050] Embodiment 2

[0051] Please refer to Figure 4 , Embodiment 2 of the present invention is a parallel technical solution to Embodiment 1. The difference from Embodiment 1 is that a partial area of the cantilever portion 52 of the centering support piece 5 is located in the gap 44 between the two sets of concave magnetic structures 43. In this way, the total length of the cantilever portion 52 can be extended, enabling the centering support piece 5 to vibrate with a larger amplitude along with the voice coil 3, so that the sound generating unit can vibrate with a larger amplitude, thereby enhancing the loudness of the sound generating unit.

[0052] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. Sound generating unit, characterized in that: Comprising a chassis; a vibration assembly, the vibration assembly including a diaphragm assembly and two voice coils, the diaphragm assembly connecting the voice coils and 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 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 oppositely, a gap being formed between the two sets of concave magnetic structures, the gap being arranged corresponding to the gap between the two voice coils; a support member, one end of the support member connecting the chassis, and the other end of the support member passing through the gap and connecting the two voice coils.

2. The sound generating unit according to claim 1, wherein: 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 side magnetic structure face in opposite directions.

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

4. The sound generating unit according to claim 1, wherein: The support member includes a centering washer, the centering washer including an outer fixing portion, a cantilever portion and an inner fixing portion sequentially connected from outside to inside, the outer fixing portion connecting the chassis, the inner fixing portion connecting the voice coil, and a partial area of the inner fixing portion being located in the gap.

5. The sound generating unit according to claim 4, wherein: An inner pad is provided on the inner fixing portion, an outer pad electrically connected to the inner pad is provided on the outer fixing portion, the inner pad is located in the gap, and the lead of the voice coil is welded to the inner pad.

6. The sound generating unit according to claim 5, wherein: The number of the centering washers is two, two inner pads and two outer pads are provided on the centering washers, the two inner pads and the two outer pads on the same centering washer are connected in one-to-one correspondence, and the two inner pads on the same centering washer are respectively electrically connected to the two voice coils.

7. The sound generating unit according to claim 5, characterized in that: A partial area of the cantilever portion is located in the gap.

8. The sound generating unit according to claim 4, wherein: The support member further includes an elastic auxiliary diaphragm, the elastic auxiliary diaphragm connecting the inner fixing portion and the outer fixing portion.

9. The sound generating unit according to claim 1, wherein: The support member is an elastic auxiliary diaphragm.

10. The sound generating unit according to claim 1, characterized in that: The two sets of concave magnetic structures are symmetrically arranged.

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