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 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 respectively 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 is located on the inner side of the edge magnetic structure and connected with 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 of the edge magnetic structure and excellent in performance.

Description

Technical Field

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

[0002] The sounding unit is mostly used in electronic devices such as mobile phones and earphones, and the scenarios where it is used are mostly for calls, playing music, playing videos, etc.

[0003] In order to improve 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 rolling vibration of the voice coil. Currently, 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 clearanced, which results in that the volume of the edge magnetic structure cannot be increased. At the same time, it also causes that the length of the effective magnetic gap of the magnetic circuit component cannot be increased, so that the BL value of the sounding unit is difficult to improve, and the performance of the sounding unit is rather unsatisfactory. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a high-performance sounding unit.

[0005] In order to solve the above technical problem, the technical scheme adopted by the utility model is as follows: 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 two groups of concave magnetic structures arranged oppositely, and a gap is formed between the two groups of concave magnetic structures;

[0009] A support component, the support component comprising a centering washer, the centering washer comprising an outer fixing part, a cantilever part and an inner fixing part which are connected in sequence from outside to inside, the outer fixing part connecting the chassis, the inner fixing part being located inside the edge magnetic structure and connecting the voice coil, and a part of the cantilever part being located in the gap.

[0010] In one embodiment, an inner pad is provided on the inner fixing part, an outer pad electrically connected to the inner pad is provided on the outer fixing part, and the lead of the voice coil is welded on the inner pad.

[0011] In one embodiment, the number of the centering support pieces is two. At least one of the centering support pieces is provided with two inner pads and two outer pads. The two inner pads and the two outer pads on the same centering support piece are connected in one-to-one correspondence. The two inner pads on the centering support piece are connected to the two leads of the voice coil in one-to-one correspondence.

[0012] In one embodiment, the number of the centering support pieces is two. Each centering support piece is provided with the inner pad. The two inner pads are connected to the two leads of the voice coil in one-to-one correspondence.

[0013] In one embodiment, one end of the inner fixing part away from the cantilever part protrudes from the inner wall surface of the voice coil. The bottom of the voice coil and the inner fixing part are fixedly connected by glue.

[0014] In one embodiment, the central magnetic structure has an avoidance groove for avoiding the inner fixing part.

[0015] In one embodiment, the glue contacts the bottom surface and the inner wall surface of the voice coil.

[0016] In one embodiment, the two sets of concave magnetic structures are symmetrically arranged.

[0017] In one embodiment, the magnetic poles of the two sets of concave magnetic structures face the same direction.

[0018] In one embodiment, the support member further includes an elastic auxiliary film, and the elastic auxiliary film connects the inner fixing part and the outer fixing part.

[0019] The beneficial effects of the present utility model are as follows: The structure of the present sounding unit is novel. There is no need to avoid empty spaces 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 improving the B value of the sounding unit. At the same time, the effective length of the magnetic gap can 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 be significantly improved.

[0020] The entire area of the inner fixing part is located inside the edge magnetic structure, so that only the cantilever part passes through the gap between the two sets of concave magnetic structures. By designing the width and position of the cantilever part, the width of the gap can be designed to be smaller, so that the overall volume of the edge magnetic structure can be set larger, and further improve the B value of the sounding unit to further improve the acoustic performance of the sounding unit. Moreover, the length of the cantilever part is long enough to reduce its stress, which is beneficial to increasing the fracture margin of the centering support piece, so that the reliability of the centering support piece is higher. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying 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.

[0022] Figure 1 Explosion diagram of the sound generating unit of Embodiment 1 of the present invention;

[0023] Figure 2 Structural schematic of a partial structure of the sound generating unit of Embodiment 1 of the present invention Figure 1 ;

[0024] Figure 3 Structural schematic of a partial structure of the sound generating unit of Embodiment 1 of the present invention Figure 2 ;

[0025] Figure 4 Structural schematic diagram of a partial structure of the sound generating unit of Embodiment 2 of the present invention.

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

[0027] 1. Frame;

[0028] 2. Diaphragm assembly;

[0029] 3. Voice coil; 31. Lead wire;

[0030] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 421. Avoidance groove; 43. Concave magnetic structure; 44. Gap; 45. Side magnet; 46. Side washer; [[ID=…]]

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

[0032] 6. Skeleton. Detailed implementation manners

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

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some 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.

[0035] It should be noted that if there are directional indications in the embodiments of the present utility model, 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 drawings. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "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" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of A, or the solution of B, or the solution of both A and B being satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection 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 the present utility model is as follows: A sounding unit, comprising a chassis 1, a vibration assembly, a magnetic circuit assembly 4 and a support component. 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 4 includes a yoke 41, a central magnetic structure 42 and a side magnetic structure respectively arranged on the yoke 41. The side magnetic structure surrounds the central magnetic structure 42. A magnetic gap for the voice coil 3 to move is formed between the central magnetic structure 42 and the side magnetic structure. The side magnetic structure includes two sets of concave magnetic structures 43 arranged oppositely, and a gap 44 is formed between the two sets of concave magnetic structures 43. The support component includes a centering washer 5. The centering washer 5 includes an outer fixing part 51, a cantilever part 52 and an inner fixing part 53 connected in sequence from outside to inside. The outer fixing part 51 connects the chassis 1. The inner fixing part 53 is located inside the side magnetic structure and connects the voice coil 3. A partial area of the cantilever part 52 is located in the gap 44.

[0041] Preferably, the two sets of concave magnetic structures 43 are symmetrically arranged, that is, the two sets of concave magnetic structures 43 form a symmetric structure. That is to say, the gap 44 is arranged corresponding to the central axis of the voice coil 3. Specifically, 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 respectively in a concave shape. The side magnet 45 in a concave shape can be either an integral structure or composed of a plurality of sub-magnets arranged and combined. However, there is no connected magnetic gap and the gap outside the side magnetic structure between two adjacent sub-magnets. In other words, there is no gap at the end angle of the side magnet 45 composed of a plurality of sub-magnets arranged and combined.

[0042] The magnetic poles of the two sets of concave magnetic structures 43 face the same direction. That is to say, when the bottom end of one side magnet 45 is an S pole, the bottom end of the other side magnet 45 is also an S pole. When the bottom end of one side magnet 45 is an N pole, the bottom end of the other side magnet 45 is also an N pole.

[0043] The central magnetic structure 42 includes a central magnet and a central washer. The central magnet connects the central washer and the yoke 41. The magnetic pole orientation of the central magnet is opposite to that of the side magnet 45. That is, when the bottom end of the side magnet 45 is an S pole, the bottom end of the central magnet is an N pole. When the bottom end of the side magnet 45 is an N pole, the bottom end of the central magnet is an S pole.

[0044] Optionally, the sounding unit further includes a skeleton 6. The skeleton 6 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 sound film and a dome provided on the sound film.

[0045] To enable the inner fixing portion 53 to have a larger connection area with the voice coil 3, one end of the inner fixing portion 53 away from the cantilever portion 52 protrudes from the inner wall surface of the voice coil 3. The bottom of the voice coil 3 and the inner fixing portion 53 are fixedly connected by a colloid, and the colloid contacts the bottom surface and the inner wall surface of the voice coil 3.

[0046] 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, and the lead 31 of the voice coil 3 is welded to the inner pad.

[0047] In this embodiment, the number of the centering supports 5 is two. At least one of the centering supports 5 is provided with two inner pads and two outer pads. 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 centering support 5 are connected to the two leads 31 of the voice coil 3 in a one-to-one correspondence.

[0048] The central magnetic structure 42 has an avoidance groove 421 for avoiding the inner fixing portion 53. The setting of the avoidance groove 421 can prevent the inner fixing portion 53 from colliding with the central magnetic structure 42 when the vibration assembly vibrates.

[0049] The inner pad is located inside the voice coil 3, weakening the transmission of the pulling force of the cantilever portion 52 of the centering support 5. The inner pad has high position stability, which is beneficial to reducing the risk of the lead 31 on the inner pad breaking.

[0050] To enable the support member to provide a greater supporting force, optionally, the support member further includes an elastic auxiliary film, and the elastic auxiliary film connects the inner fixing portion 53 and the outer fixing portion 51. The material of the elastic auxiliary film and the material of the sound film can be the same or different.

[0051] Embodiment Two

[0052] Please refer to Figure 4 , Embodiment Two of the present utility model is an alternative technical solution to Embodiment One. The difference from Embodiment One is that the number of the centering supports 5 is two, and each centering support 5 is provided with an inner pad and a corresponding outer pad. The two inner pads are connected to the two leads 31 of the voice coil 3 in a one-to-one correspondence. That is, one centering support 5 is electrically connected to the negative pole of the voice coil 3, and the other centering support 5 is electrically connected to the positive pole of the voice coil 3, so that the center of gravity distribution of the sound generating unit can be more balanced.

[0053] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

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 an edge magnetic structure respectively disposed on the yoke, the edge magnetic structure surrounding the central magnetic structure, the edge magnetic structure including two sets of concave magnetic structures arranged oppositely, and a gap formed between the two sets of concave magnetic structures; a support member, the support member including a centering washer, the centering washer including an outer fixing portion, a cantilever portion and an inner fixing portion connected in sequence from outside to inside, the outer fixing portion connecting to the chassis, the inner fixing portion being located inside the edge magnetic structure and connecting to the voice coil, and a part of the cantilever portion being located in the gap.

2. The sound generating unit according to claim 1, 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, and a lead of the voice coil is welded to the inner pad.

3. The sound generating unit according to claim 2, wherein: The number of the centering washers is two, at least one of the centering washers is provided with two inner pads and two outer pads, 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 centering washer are connected to the two leads of the voice coil in one-to-one correspondence.

4. The sound generating unit according to claim 2, characterized in that: The number of the centering washers is two, each centering washer is provided with the inner pad, and the two inner pads are connected to the two leads of the voice coil in one-to-one correspondence.

5. The sound generating unit according to claim 1, wherein: One end of the inner fixing portion away from the cantilever portion protrudes from the inner wall surface of the voice coil, and the bottom of the voice coil is fixedly connected to the inner fixing portion by a colloid.

6. The sound generating unit according to claim 5, wherein: The central magnetic structure has an avoidance groove for avoiding the inner fixing portion.

7. The sound generating unit according to claim 5, wherein: The colloid contacts the bottom surface and the inner wall surface of the voice coil.

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

9. The sound generating unit according to claim 1, wherein: The magnetic poles of the two sets of concave magnetic structures face the same direction.

10. The sound generating unit according to claim 1, characterized in that: The support member further includes an elastic auxiliary diaphragm, and the elastic auxiliary diaphragm connects the inner fixing portion and the outer fixing portion.

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