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 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, and a central magnetic structure and an edge magnetic structure which are arranged on the yoke, the edge magnetic structure is arranged around the central magnetic structure, the edge 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 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 vertical part is connected with the outer wall surface of the voice coil, and the bottom surface of the plane part is connected with the top surface of the voice coil; a partial region of the cantilever portion is located in the gap. The sounding unit is novel in structure, large in overall size of the side magnetic structure and the center magnetic 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] 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 increase the loudness of a speaker, existing technology typically increases the amplitude of the speaker. Existing large-amplitude speakers generally use support components connected to the voice coil to conduct and / or suppress the voice coil's rolling vibration. Currently, each of the four corners of the voice coil is connected to a support component, and the side magnet structure must be free from air where the support components meet. 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 BL value of the speaker is 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-generating unit.

[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 a voice coil, the diaphragm assembly connecting the voice coil and the basin frame;

[0008] A magnetic circuit assembly 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 the side magnetic structure comprises two groups of concave magnetic structures provided opposite to each other, with a gap formed between the two groups of concave magnetic structures;

[0009] A supporting component, wherein 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, the vertical portion is connected to the outer wall surface of the voice coil, the bottom surface of the planar portion is connected to the top surface of the voice coil, and a partial area of the cantilever portion is located in the gap.

[0010] In one embodiment, one end of the planar portion away from the vertical portion is protruded from the inner wall surface of the voice coil, and the bottom surface of the planar portion is fixedly connected to the voice coil via colloid.

[0011] In one embodiment, the colloid contacts the top surface and inner wall surface of the voice coil.

[0012] In one embodiment, the central magnetic structure has an escape groove for escaping the planar portion.

[0013] 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.

[0014] In one embodiment, an inner pad is provided on the bottom surface of the planar portion, the inner pad is located inside the voice coil, an outer pad electrically connected to the inner pad is provided on the outer fixing portion, and the lead of the voice coil is welded to the inner pad.

[0015] In one embodiment, the number of the centering support plates is two, and at least one of the centering support plates is provided with two inner solder pads and two outer solder pads. 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 centering support plate are connected to the two leads of the voice coil in a one-to-one correspondence.

[0016] In one embodiment, there are two centering supports, each of which is provided with an inner soldering pad, and the two inner soldering pads are connected to the two leads of the voice coil in a one-to-one correspondence.

[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] 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.

[0020] 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.

[0021] The large bonding area between the inner fixing portion and the voice coil can reduce the risk of separation between the inner fixing portion and the voice coil, thereby improving the structural stability of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 This is an exploded view of the sound unit of the first embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of the sound unit of the first embodiment of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 2 ;

[0028] Figure 6 This is a structural diagram of part of the sound-emitting unit of the second embodiment of the present invention.

[0029] Description of Figure Numbers:

[0030] 1. Basin rack;

[0031] 2. Diaphragm assembly;

[0032] 3. Voice coil; 31. Lead wire;

[0033] 4. Magnetic circuit assembly; 41. Yoke; 42. Center magnetic structure; 421. Center magnet; 422. Center washer; 423. Avoidance groove; 43. Concave magnetic structure; 44. Gap; 45. Side magnet; 46. Side washer;

[0034] 5. Centering support; 51. External fixing portion; 52. Cantilever portion; 53. Internal fixing portion; 531. Vertical portion; 532. Plane portion;

[0035] 6. Frame; 61. Support arm. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] Example 1

[0043] 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 4 and a supporting component, the vibration component includes a diaphragm component 2 and a voice coil 3, the diaphragm component 2 connects the voice coil 3 and the basin 1; the magnetic circuit component 4 includes a yoke 41 and a central magnetic structure 42 and a side magnetic structure respectively arranged on the yoke 41, the side magnetic structure is arranged around the central magnetic structure 42, and a magnetic gap is formed between the central magnetic structure 42 and the side magnetic structure for the voice coil 3 to move, the side magnetic structure includes two groups of concave magnetic structures 43 arranged opposite to each other, the two groups A gap 44 is formed between the concave magnetic structures 43; 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, the vertical portion 531 is connected to the outer wall surface of the voice coil 3, the bottom surface of the planar portion 532 is connected to the top surface of the voice coil 3, and a part of the cantilever portion 52 is located in the gap 44.

[0044] Preferably, the two groups of concave magnetic structures 43 are symmetrically arranged, that is, the two groups of concave magnetic structures 43 form a symmetrical structure, that is, the gap 44 is arranged corresponding to the central axis of the voice coil 3. In detail, the concave magnetic structure 43 includes a side magnet 45 and a side washer 46. The side magnet 45 connects the yoke 41 and the side washer 46. The side magnet 45 and the side washer 46 are each concave-shaped. The concave-shaped side magnet 45 can be a one-piece integral structure or can be composed of a plurality of sub-magnets arranged and assembled. However, there is no magnetic gap between adjacent sub-magnets and no gap outside the side magnetic structure. In other words, the end corners of the side magnet 45 composed of a plurality of sub-magnets are seamless.

[0045] The magnetic poles of the two groups of concave magnetic structures 43 are oriented in the same direction, that is, when the bottom end of one side magnet 45 is the S pole, the bottom end of the other side magnet 45 is also the S pole, and when the bottom end of one side magnet 45 is the N pole, the bottom end of the other side magnet 45 is also the N pole.

[0046] 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 pole direction of the central magnetic steel 421 is opposite to the magnetic pole direction of the side magnetic steel 45, that is, when the bottom end of the side magnetic steel 45 is the S pole, the bottom end of the central magnetic steel 421 is the N pole, and when the bottom end of the side magnetic steel 45 is the N pole, the bottom end of the central magnetic steel 421 is the S pole.

[0047] 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.

[0048] In order to allow the inner fixing portion 53 to have a larger connection area with the voice coil 3, the end of the planar portion 532 away from the vertical portion 531 is arranged to protrude from the inner wall surface of the voice coil 3, and the bottom surface of the planar portion 532 is fixedly connected to the voice coil 3 through a colloid, and the colloid contacts the top surface and inner wall surface of the voice coil 3.

[0049] Preferably, an inner pad is provided on the bottom surface of the planar portion 532, and the inner pad is located on the inner side of the voice coil 3. An outer pad electrically connected to the inner pad is provided on the outer fixing portion 51, and the lead 31 of the voice coil 3 is welded on the inner pad.

[0050] In this embodiment, the number of the centering support plates 5 is two, and at least one of the centering support plates 5 is provided with two inner solder pads and two outer solder pads. The two inner solder pads on the same centering support plate 5 are connected to the two outer solder pads in a one-to-one correspondence, and the two inner solder pads on the centering support plate 5 are connected to the two leads 31 of the voice coil 3 in a one-to-one correspondence.

[0051] The inner pad is located inside the voice coil 3 , which reduces the transmission of the pulling force of the cantilever portion 52 of the centering support 5 . The position stability of the inner pad is high, which helps to reduce the risk of breakage of the lead 31 on the inner pad.

[0052] The central magnetic structure 42 has an avoidance groove 423 for avoiding the flat portion 532 and the lead 31. The setting of the avoidance groove 423 can prevent the flat portion 532 from colliding with the central magnetic structure 42 when the vibration component vibrates. In this embodiment, 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.

[0053] To enable the support component to provide greater supporting force, the support component optionally further includes an elastic auxiliary membrane, which connects the end of the cantilever portion 52 connected to the vertical portion 531 and the external fixing portion 51. The material of the elastic auxiliary membrane can be the same as or different from that of the sound diaphragm.

[0054] Example 2

[0055] Please refer to Figure 6 The second embodiment of the present invention is a parallel technical solution to the first embodiment. It differs from the first embodiment in that two centering supports 5 are provided, each with an inner solder pad and a corresponding outer solder pad. The two inner solder pads are connected to the two leads 31 of the voice coil 3 in a one-to-one correspondence. Specifically, one centering support 5 is electrically connected to the negative terminal of the voice coil 3, while the other centering support 5 is electrically connected to the positive terminal of the voice coil 3. This ensures a more balanced center of gravity distribution for the sound unit.

[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: include basin rack; A vibration assembly, the vibration assembly comprising a diaphragm assembly and a voice coil, the diaphragm assembly connecting the voice coil and the basin frame; A magnetic circuit assembly 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 the side magnetic structure comprises two groups of concave magnetic structures provided opposite to each other, with a gap formed between the two groups of concave magnetic structures; A supporting component, wherein 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, the vertical portion is connected to the outer wall surface of the voice coil, the bottom surface of the planar portion is connected to the top surface of the voice coil, and a partial area of the cantilever portion is located in the gap.

2. The sound unit according to claim 1, characterized in that: One end of the planar portion away from the vertical portion is protruded from the inner wall surface of the voice coil, and the bottom surface of the planar portion is fixedly connected to the voice coil via colloid.

3. The sound unit according to claim 2, characterized in that: The colloid contacts the top surface and the inner wall surface of the voice coil.

4. The sound unit according to claim 2, characterized in that: The central magnetic structure has an escape groove for escaping the planar portion.

5. The sound unit according to claim 4, 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.

6. The sound unit according to claim 2, characterized in that: An inner pad is provided on the bottom surface of the planar portion, and the inner pad is located inside the voice coil. An outer pad electrically connected to the inner pad is provided on the outer fixing portion, and the lead of the voice coil is welded to the inner pad.

7. The sound unit according to claim 6, characterized in that: There are two centering supports, and at least one of the centering supports is provided with two inner pads and two outer pads. The two inner pads on the same centering support are connected to the two outer pads in a one-to-one correspondence, and the two inner pads on the centering support are connected to the two leads of the voice coil in a one-to-one correspondence.

8. The sound unit according to claim 6, characterized in that: There are two centering supports, each of which is provided with an inner soldering pad, and the two inner soldering pads are connected to the two leads of the voice coil in a one-to-one correspondence.

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

10. 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.

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