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 supporting part, and is characterized in that the vibration assembly comprises two voice coils; the magnetic circuit assembly comprises a yoke and two groups of center magnetic structures and side magnetic structures which are arranged on the yoke respectively, the center magnetic structures are arranged side by side, 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; the supporting component comprises a centering support chip, the centering support chip comprises an outer fixing part, a cantilever part and an inner fixing part which are sequentially connected from outside to inside, the outer fixing part is connected with the basin stand, the inner fixing part comprises a vertical part and a plane part which are connected, the bottom end of the vertical part is connected with the cantilever part, the bottom surface of the plane part is connected with the top surface of the voice coil, and a partial area of the cantilever part is located in the gap. The sound production unit is novel in structure, large in overall size and excellent in performance by adopting a double-voice-coil framework, a side magnetic structure and a center magnetic structure.

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] The supporting component includes a centering support plate, and the centering support plate includes an outer fixing portion, a cantilever portion, and an inner fixing portion connected in sequence from the outside to the inside. The outer fixing portion is connected to the basin frame, and the inner 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. Part of the cantilever portion is located in the gap.

[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, an inner pad is provided on the planar portion, an outer pad electrically connected to the inner pad is provided on the outer fixing portion, the inner pad is located inside the voice coil, and a lead of the voice coil is welded to the inner pad.

[0013] In one embodiment, the top of the central magnetic structure has an escape groove for evading the inner fixing portion.

[0014] In one embodiment, the central magnetic structure includes a central magnetic steel and a central washer, the central magnetic steel connects the yoke and the central washer, and the avoidance groove is provided on the central washer.

[0015] In one embodiment, the bottom surface of the planar portion is fixedly connected to the voice coil via a colloid, and the colloid contacts the top surface and inner wall surface of the voice coil.

[0016] In one embodiment, the number of the centering support plates is two, and two inner solder pads and two outer solder pads are provided on the centering support plate. The two inner solder pads on the same centering support plate are connected to the two outer solder pads in a one-to-one correspondence, and the two inner solder pads on the same centering support plate are electrically connected to the two voice coils respectively.

[0017] In one embodiment, the two groups of concave magnetic structures are symmetrically arranged.

[0018] In one embodiment, a skeleton is further included, and the voice coil is indirectly connected to the diaphragm assembly through the skeleton. The skeleton has a support arm extending toward the yoke, and the support arm is connected to one end of the cantilever portion away from the external fixing portion.

[0019] In one embodiment, the bottom end of the support arm has a bent edge, and the bent edge is connected to an end of the cantilever portion away from the external fixing portion.

[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] By designing the cantilever's width and position, the gap can be reduced, thereby increasing the overall volume of the edge magnet structure and significantly improving the driver's B-value, further enhancing the driver's acoustic performance. Furthermore, the cantilever's sufficient length reduces stress, increasing the centering arm's fracture margin and ultimately enhancing its reliability.

[0022] The planar portion is located above the voice coil. On the basis of not encroaching on the setting space of the central magnetic structure or only encroaching on a small amount of the setting space of the central magnetic structure, the area of the planar portion can be set to be larger, so that the planar portion and the voice coil can form a larger bonding area, thereby improving the structural stability of the sound unit.

[0023] The sound unit adopts a dual voice coil structure, which can effectively enhance the driving force, enabling the sound unit to achieve large amplitude and loudness. 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 for Figure 4 Enlarged view of point A in the middle;

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

[0031] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0032] Description of Figure Numbers:

[0033] 1. Basin rack;

[0034] 2. Diaphragm assembly;

[0035] 3. Voice coil; 31. Lead wire;

[0036] 41. Yoke; 42. Center magnetic structure; 421. Center magnet; 422. Center washer; 423. Avoidance groove; 43. Concave magnetic structure; 431. Side magnet; 432. Side washer; 44. Gap;

[0037] 5. Centering support; 51. External fixing portion; 52. Cantilever portion; 53. Internal fixing portion; 531. Vertical portion; 532. Plane portion;

[0038] 6. Frame; 61. Support arm; 62. Bent edge. 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 5 , the utility model embodiment 1 is: a sound unit, including a basin 1, a vibration component, a magnetic circuit component and a supporting component, the vibration component includes a diaphragm component 2 and two voice coils 3, the two voice coils 3 are arranged side by side, the diaphragm component 2 connects 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 number of the central magnetic structure 42 is two groups, the two groups of central magnetic structures 42 are 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, and the side magnetic structure includes oppositely arranged There are two groups of concave magnetic structures 43, and a gap 44 is formed between the two groups of concave magnetic structures 43. The gap 44 corresponds to the gap between the two voice coils 3. The supporting component includes a centering support plate 5, and the centering support plate 5 includes an outer fixing portion 51, a cantilever portion 52 and an inner fixing portion 53 connected in sequence from the outside to the inside. The outer fixing portion 51 is connected to the basin frame 1, and the inner fixing portion 53 includes a connected vertical portion 531 and a planar portion 532. The bottom end of the vertical portion 531 is connected to the cantilever portion 52, and the bottom surface of the planar portion 532 is connected to the top surface of the voice coil 3. Part of the cantilever portion 52 is located in the gap 44.

[0047] In some embodiments, the two voice coils 3 are arranged without contact with each other, and a clear gap exists between the two voice coils 3. However, in this embodiment, the two voice coils 3 are bonded to each other, which can improve the structural stability of the vibration assembly and alleviate the phenomenon of split vibration of the vibration assembly.

[0048] The two groups of concave magnetic structures 43 are symmetrically arranged, that is, the two groups of concave magnetic structures 43 constitute a symmetrical structure. In detail, the concave magnetic structure 43 includes edge magnets 431 and edge washers 432. The edge magnets 431 connect the yoke 41 and the edge washers 432. The edge magnets 431 and the edge washers 432 are respectively concave in shape. The concave-shaped edge magnets 431 can be an integrated structure or can be composed of a plurality of sub-magnets arranged and combined. However, there is no gap between two adjacent sub-magnets connecting the inside and outside of the sub-magnets. In other words, the end corners of the edge magnets 431 composed of a plurality of sub-magnets have no gaps.

[0049] The magnetic poles of the two groups of concave magnetic structures 43 are oriented in opposite directions. That is, when the bottom end of one side magnetic steel 431 is an S pole, the bottom end of the other side magnetic steel 431 is an N pole.

[0050] The magnetic poles of the central magnetic structure 42 and the adjacent side magnetic structures are oriented oppositely. The central magnetic structure 42 includes a central magnetic steel 421 and a central washer 422. The central magnetic steel 421 connects the central washer 422 and the yoke 41. The magnetic poles of the central magnetic steel 421 are oriented oppositely to the magnetic poles of the adjacent side magnetic steels 431. That is, when the bottom end of one central magnetic steel 421 is the N pole, the bottom end of the adjacent side magnetic steel 431 is the S pole, and the bottom end of the other central magnetic steel 421 is the S pole.

[0051] Optionally, the sound unit further includes a skeleton 6, which is respectively connected to the diaphragm assembly 2 and the voice coil 3. That is, the voice coil 3 is indirectly connected to the diaphragm assembly 2 via the skeleton 6. The skeleton 6 has a support arm 61 extending toward the yoke 41, and the support arm 61 is connected to an end of the cantilever portion 52 away from the external fixing portion 51. The support arm 61 on the skeleton 6 can support the centering arm 5, thereby improving the working stability of the centering arm 5.

[0052] An inner pad is provided on the planar portion 532 , and an outer pad electrically connected to the inner pad is provided on the outer fixing portion 51 . The inner pad is located inside the voice coil 3 , and the lead 31 of the voice coil 3 is welded to the inner pad.

[0053] The top of the central magnetic structure 42 has a avoidance groove 423 for avoiding the inner fixing part 53, so as to avoid the inner fixing part 53 from colliding with the central magnetic structure 42 when the sound unit is working, and at the same time, the inner fixing part 53 can have enough space to set the inner welding pad. Preferably, the avoidance groove 423 is provided on the central washer 422, so that the setting of the avoidance groove 423 can avoid affecting the volume of the central magnetic steel 421, ensuring that the sound unit has a higher B value. In other embodiments, the avoidance groove 423 can include a through groove provided on the central washer 422 and a blind groove provided on the central magnetic steel 421 and connected to the through groove. It is easy to understand that even if the avoidance groove 423 occupies part of the area of the central magnetic steel 421, the blind groove is not connected to the bottom surface of the central magnetic steel 421, so the central magnetic steel 421 can still retain a larger total volume.

[0054] Specifically, the bottom surface of the planar portion 532 is fixedly connected to the voice coil 3 via a colloid, which contacts the top surface and inner wall of the voice coil 3. In a specific product, the colloid may also contact the outer wall of the voice coil 3, thereby further increasing the bonding area between the planar portion 532 and the voice coil 3.

[0055] In detail, there are two centering supports 5, and two inner pads and two outer pads are provided on the centering support 5. The two inner pads on the same centering support 5 are connected to the two outer pads in a one-to-one correspondence, and the two inner pads on the same centering support 5 are electrically connected to the two voice coils 3 respectively.

[0056] In order to enable the support component to provide greater supporting force, the support component optionally further includes an elastic auxiliary membrane, which connects the inner fixing portion 53 and the outer fixing portion 51. The material of the elastic auxiliary membrane and the material of the sound membrane can be the same or different.

[0057] Example 2

[0058] Please refer to Figure 6 and Figure 7 The second embodiment of the present invention is a further improvement on the skeleton 6 based on the first embodiment. The difference from the first embodiment is that the bottom end of the support arm 61 has a bent edge 62, and the bent edge 62 connects the end of the cantilever portion 52 away from the external fixing portion 51. In this way, the connection area between the support arm 61 and the centering support piece 5 is increased, so that the skeleton 6 can support the centering support piece 5 more stably.

[0059] 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, the vibration assembly comprising a diaphragm assembly and two voice coils, the diaphragm assembly connecting the voice coils and the basin frame; 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; The supporting component includes a centering support plate, and the centering support plate includes an outer fixing portion, a cantilever portion, and an inner fixing portion connected in sequence from the outside to the inside. The outer fixing portion is connected to the basin frame, and the inner 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. Part of the cantilever portion is located in the gap.

2. The sound unit according to claim 1, characterized in that: 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.

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

4. The sound unit according to claim 1, wherein: An inner pad is provided on the planar portion, an outer pad electrically connected to the inner pad is provided on the outer fixing portion, the inner pad is located inside the voice coil, and a lead of the voice coil is welded to the inner pad.

5. The sound unit according to claim 4, characterized in that: The top of the central magnetic structure is provided with an escape groove for evading the inner fixing portion.

6. The sound unit according to claim 5, characterized in that: The central magnetic structure includes a central magnetic steel and a central washer. The central magnetic steel connects the yoke and the central washer. The avoidance groove is provided on the central washer.

7. The sound unit according to claim 4, characterized in that: The bottom surface of the planar portion is fixedly connected to the voice coil via colloid, and the colloid contacts the top surface and inner wall surface of the voice coil.

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

9. The sound unit according to claim 1, characterized in that: It also includes a skeleton, the voice coil is indirectly connected to the diaphragm assembly through the skeleton, the skeleton has a support arm extending toward the yoke, and the support arm is connected to one end of the cantilever part away from the external fixing part.

10. The sound unit according to claim 9, characterized in that: The bottom end of the support arm has a bent edge, and the bent edge is connected to an end of the cantilever portion away from the external fixing portion.

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