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; 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 voice coil. The sounding unit is novel in structure and 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 electro-acoustic transducers, and particularly to a sounding unit. Background Art

[0002] Sounding units are mostly used in electronic devices such as mobile phones and earphones, and the scenarios where they are 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. 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, which results in that the volume of the edge magnetic structure cannot be increased. At the same time, it also causes the length of the effective magnetic gap of the magnetic circuit component not to be increased, so that the BL value of the sounding unit is difficult to improve, and the performance of the sounding unit is less than satisfactory. 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 solution adopted by the utility model is: a sounding unit, comprising:

[0006] A chassis;

[0007] A vibration assembly, the vibration assembly includes a diaphragm assembly and a voice coil, and the diaphragm assembly connects the voice coil and the chassis;

[0008] A magnetic circuit assembly, the magnetic circuit assembly includes a yoke and a central magnetic structure and an edge magnetic structure respectively arranged on the yoke, the edge magnetic structure surrounds the central magnetic structure, and the edge magnetic structure includes 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, one end of the support component is connected to the chassis, and the other end of the support component passes through the gap and is connected to the voice coil.

[0010] In one embodiment, the support component includes a centering washer, the centering washer includes an outer fixing part, a cantilever part and an inner fixing part connected in sequence from outside to inside, the outer fixing part is connected to the chassis, the inner fixing part is connected to the voice coil, and a part of the inner fixing part is located in the gap.

[0011] 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, the inner pad is located in the gap, and the lead of the voice coil is welded to the inner pad.

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

[0013] 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 on the same centering support piece are connected to the two outer pads in one-to-one correspondence, and the two inner pads on the centering support piece are connected to the two leads of the voice coil in one-to-one correspondence.

[0014] In one embodiment, a partial area of the cantilever portion is located in the gap.

[0015] In one embodiment, one end of the inner pad away from the voice coil extends outward out of 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, the magnetic poles of the two sets of concave magnetic structures face the same direction.

[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 the air 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 sets 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 set an avoidance structure for the central magnetic structure to avoid the inner fixing portion, which can facilitate the processing and manufacturing of the central magnetic structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 is an exploded view of the sounding unit according to Embodiment 1 of the present utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the structure of the sound unit of the first embodiment of the present invention. Figure 2 ;

[0025] Figure 4 This is a schematic structural diagram of a portion of the sound-emitting unit according to the second embodiment of the present invention;

[0026] Figure 5 This is a structural diagram of part of the structure of the sound-emitting unit of the third embodiment of the present invention.

[0027] Description of Figure Numbers:

[0028] 1. Basin rack;

[0029] 2. Diaphragm assembly;

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

[0031] 4. Magnetic circuit assembly; 41. Yoke; 42. Center magnetic structure; 43. Concave magnetic structure; 44. Gap; 45. Side magnetic steel; 46. Side washer;

[0032] 5. Centering support; 51. External fixing portion; 52. Cantilever portion; 53. Internal fixing portion;

[0033] 6. Skeleton. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[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 should not be construed 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" that appears 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 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.

[0039] In this application, unless otherwise clearly defined and limited, the terms such as "installation", "connection", "connection", "fixation", 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.

[0040] Embodiment 1

[0041] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: a sound generating unit, including a chassis 1, a vibration assembly, a magnetic circuit assembly 4 and a support member. 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 and a central magnetic structure 42 and a side magnetic structure respectively provided on the yoke 41. The side magnetic structure surrounds the central magnetic structure 42, and 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 opposite to each other, and a gap 44 is formed between the two sets of concave magnetic structures 43; 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 voice coil 3.

[0042] Preferably, the two sets of the concave magnetic structures 43 form a symmetric structure, that is, 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. The side magnet 45 connects the yoke 41 and the side washer. 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 connecting magnetic gap between two adjacent sub-magnets and the gap outside the side magnetic structure. In other words, there is no gap at the end corners of the side magnet 45 composed of a plurality of sub-magnets arranged and combined.

[0043] The magnetic poles of the two sets of the 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.

[0044] 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 direction 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.

[0045] Optionally, the sound generating 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.

[0046] In other embodiments, the supporting member can be an elastic auxiliary film. The material of the elastic auxiliary film can be the same as or different from that of the sound film. In some other embodiments, the supporting member includes a centering washer 5. The centering washer 5 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 chassis 1. The inner fixing portion 53 is connected to the voice coil 3. 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, and 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.

[0047] In this embodiment, the number of the centering support pieces 5 is two. At least one of the centering support pieces 5 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 5 are correspondingly connected one by one. The two inner pads on the centering support piece 5 are correspondingly connected with the two leads 31 of the voice coil 3 one by one.

[0048] To enable the support component to provide greater supporting force, optionally, the support component further includes an elastic auxiliary film, and the elastic auxiliary film connects the inner fixing part 53 and the outer fixing part 51.

[0049] Embodiment Two

[0050] Please refer to Figure 4 , Embodiment Two of the present utility model is a parallel technical solution of Embodiment One. The difference from Embodiment One is that a partial area of the cantilever part 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 part 52 can be extended, so that the centering support piece 5 can vibrate with a larger amplitude along with the voice coil 3, thereby enabling the sounding unit to vibrate with a larger amplitude, and further improving the loudness of the sounding unit.

[0051] Embodiment Three

[0052] Please refer to Figure 5 , Embodiment Three of the present utility model is a parallel technical solution of Embodiment One. The difference from Embodiment One is that the number of the centering support pieces 5 is two, and each centering support piece 5 is provided with an inner pad and a corresponding outer pad. The two inner pads are correspondingly connected with the two leads 31 of the voice coil 3 one by one. That is, one centering support piece 5 is electrically connected to the negative pole of the voice coil 3, and the other centering support piece 5 is electrically connected to the positive pole of the voice coil 3.

[0053] In this embodiment, a partial area of the cantilever part 52 of the centering support piece 5 is located in the gap 44 between the two sets of concave magnetic structures 43. One end of the inner pad away from the voice coil 3 extends outward from the gap 44, which can increase the area of the inner pad, thereby facilitating the welding of the lead 31 of the voice coil 3 and the inner pad.

[0054] The above are only optional 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, a gap being formed between the two sets of concave magnetic structures; a support member, one end of the support member being connected to the chassis, and the other end of the support member passing through the gap to be connected to the voice coil.

2. 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 being connected to the chassis, the inner fixing portion being connected to the voice coil, and a partial area of the inner fixing portion being located in the gap.

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

4. The sound generating unit according to claim 3, wherein: The number of the centering washers is two, an inner pad is provided on each centering washer, and the two inner pads are respectively connected to the two leads of the voice coil in one-to-one correspondence.

5. The sound generating unit according to claim 3, characterized in that: The number of the centering washers is two, at least one centering washer is provided with two inner pads and two outer pads, the two inner pads on the same centering washer are connected to the two outer pads 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.

6. The sound generating unit according to claim 3, wherein: A partial area of the cantilever portion is located in the gap.

7. The sound generating unit according to claim 6, wherein: One end of the inner pad away from the voice coil extends out of the gap towards the outside.

8. The sound generating unit according to claim 2, wherein: The support member further includes an elastic auxiliary film, the elastic auxiliary film 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 film.

10. The sound generating unit according to claim 1, characterized in that: The magnetic poles of the two sets of concave magnetic structures face the same direction.

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