Miniature loudspeaker

Abstract

The miniature loudspeaker comprises a voice coil, a magnetic circuit assembly, a via hole and a fixing structure, the voice coil comprises a body and a lead which are connected, and the lead is arranged corresponding to a hollow area of the body; the magnetic circuit assembly comprises a yoke and a center magnetic structure arranged on the yoke, the center magnetic structure is provided with an avoiding groove used for avoiding the lead, the yoke is provided with a fixing table, and the fixing table is located in the avoiding groove; the via hole comprises a first part and a second part which are communicated, the first part is arranged on the fixed table and communicated with the outer surface of the fixed table, the second part is arranged on the yoke and communicated with the bottom surface of the yoke, and one end, far away from the body, of the lead penetrates out of the bottom surface of the yoke through the hole; the fixing structure is arranged on the fixing table and connected with the lead to fix the lead. The receding groove of the central magnetic structure can accommodate a long lead, so that the lead has enough suspension length, the body of the voice coil can be set to be larger in a miniature loudspeaker with a large-amplitude framework, and the performance of the miniature loudspeaker can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a miniature loudspeaker. Background Art

[0002] In the prior art, in order to improve the performance of micro speakers, micro speakers often use large voice coils and large amplitude design structures.

[0003] The voice coil of a micro-speaker includes a connected body and leads. When the micro-speaker adopts a large-amplitude design, the leads of the voice coil must have a sufficient suspended length to avoid phenomena such as breakage caused by stress concentration. In the prior art, the leads are generally designed on the outside of the body. When the voice coil needs to vibrate with a larger amplitude, there is insufficient space on the outside of the voice coil, and thus, it is impossible to place side magnets or leads, resulting in the inability to further improve the performance of the micro-speaker. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance large-amplitude micro-speaker.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a micro speaker, comprising:

[0006] A voice coil, the voice coil comprising a body and a lead connected to each other, the lead being arranged corresponding to a hollow area of ​​the body;

[0007] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure being provided with an escape groove for escaping the lead wire, the yoke being provided with a fixing platform, the fixing platform being located in the escape groove;

[0008] A via hole, the via hole comprising a first part and a second part connected to each other, the first part is arranged on the fixing platform and connected to the outer surface of the fixing platform, the second part is arranged on the yoke and connected to the bottom surface of the yoke, and an end of the lead wire away from the body passes through the bottom surface of the yoke through the via hole;

[0009] A fixing structure is arranged on the fixing platform and connected to the lead wire to fix the lead wire.

[0010] In one embodiment, the fixing structure is a buckle or fixing glue.

[0011] In one embodiment, the fixing platform and the yoke are an integral structure formed by integral processing.

[0012] In one embodiment, the fixing platform and the yoke are split structures, and the fixing platform and the yoke are connected by gluing, snapping, welding or by fasteners.

[0013] In one embodiment, the lead wire has at least one bending section, and the bending section is located in the avoidance groove.

[0014] In one embodiment, there are multiple bending segments.

[0015] In one embodiment, the central magnetic structure includes a central magnetic steel and a central washer, the bottom surface of the central magnetic steel is connected to the yoke, the top surface of the central magnetic steel is connected to the central washer, and the avoidance groove includes a first groove provided on the central washer and a second groove provided on the central magnetic steel, the first groove is connected to the top surface of the central washer, and the bottom of the first groove is connected to the top of the second groove.

[0016] In one embodiment, the second groove is connected to the bottom surface of the central magnetic steel, and the avoidance groove further includes a third groove provided on the top surface of the yoke, and the bottom of the second groove is connected to the top of the third groove.

[0017] In one embodiment, a cross-sectional width of a region of the avoidance groove close to the body is smaller than a cross-sectional width of a region of the avoidance groove close to the center of the central magnetic structure.

[0018] In one embodiment, the via hole is connected to the top surface of the fixing platform.

[0019] The beneficial effects of the utility model are:

[0020] The lead wire of the voice coil is led out from the body and then wound inside the body, and part of the lead wire is fixed on a fixed platform. The avoidance groove of the central magnetic structure can effectively accommodate the longer lead wire, so that the lead wire has a sufficient suspended length, so that the body of the voice coil can be set larger in the micro-speaker with a large amplitude structure, and the performance of the micro-speaker can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 An exploded view of the micro speaker of the first embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the micro speaker of the first embodiment of the utility model;

[0024] Figure 3is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the internal structure of a micro-speaker of another structure according to the first embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the internal structure of a micro speaker according to Embodiment 2 of the present utility model;

[0027] Figure 6 It is a structural schematic diagram of a part of the structure of a micro speaker according to the third embodiment of the present utility model;

[0028] Figure 7 It is a cross-sectional view of the micro-speaker according to the fourth embodiment of the present utility model.

[0029] Description of Figure Numbers:

[0030] 1. Basin stand;

[0031] 2. Diaphragm assembly;

[0032] 3. Voice coil; 31. Body; 32. Lead wire; 321. Bend section;

[0033] 4. Yoke; 41. Fixing platform; 42. Through hole; 43. Fixing glue;

[0034] 5. Center magnetic structure; 51. Center magnetic steel; 52. Center washer;

[0035] 6. Avoidance groove; 61. First groove; 62. Second groove; 63. Third groove.

[0036] 71. Ring magnet; 72. Edge magnet. DETAILED DESCRIPTION

[0037] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] 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 components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0041] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory 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 this utility model.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is: Please combine Figures 1 to 3, a micro speaker comprises a basin frame 1, a vibration component and a magnetic circuit component, the vibration component comprises a diaphragm component 2 and a voice coil 3, the diaphragm component 2 connects the basin frame 1 and the voice coil 3, in this embodiment, the diaphragm component 2 comprises a sound membrane and a ball top arranged on the sound membrane, the sound membrane comprises an inner fixing part, a folding ring part and an outer fixing part connected in sequence from the inside to the outside, the outer fixing part is connected to the basin frame 1, and the ball top is connected to the inner fixing part, in other embodiments, the diaphragm component 2 only has the sound membrane but not the ball top, which can be selected and set according to actual needs; the voice coil 3 comprises a connected The body 31 and the lead 32, the body 31 is directly or indirectly connected to the diaphragm assembly 2, and the lead 32 is arranged corresponding to the hollow area of ​​the body 31; the magnetic circuit assembly includes a yoke 4 and a central magnetic structure 5 and a side magnetic structure respectively arranged on the yoke 4, the central magnetic structure 5 is provided with an avoidance groove 6 for avoiding the lead 32, the yoke 4 is provided with a fixing platform 41, and the fixing platform 41 is located in the avoidance groove 6, the side magnetic structure is arranged around the central magnetic structure 5, the side magnetic structure is connected to the basin frame 1, and a magnetic gap is formed between the side magnetic structure and the central magnetic structure 5 for the movement of the body 31.

[0045] The micro-speaker also includes a through hole 42 and a fixing structure, the through hole 42 includes a first part and a second part that are connected to each other, the first part is arranged on the fixing platform 41 and connected to the outer surface of the fixing platform 41, the second part is arranged on the yoke 4 and connected to the bottom surface of the yoke 4, the end of the lead 32 away from the body 31 passes through the through hole 42 from the bottom surface of the yoke 4, the fixing structure is arranged on the fixing platform 41 and connected to the lead 32 to fix the lead 32, in this embodiment, the fixing structure is a fixing glue 43, in other embodiments, the fixing structure can also be a buckle, etc.

[0046] To facilitate the assembly of the micro speaker, the via hole 42 is preferably connected to the top surface of the fixing platform 41 , that is, the via hole 42 is arranged perpendicular to the yoke 4 , and correspondingly, the fixing structure is arranged on the top surface of the fixing platform 41 .

[0047] The voice coil 3 has at least two leads 32, one lead 32 is used to connect to the positive pole of the power supply, and the other lead 32 is used to connect to the negative pole of the power supply. The multiple leads 32 in the voice coil 3 are axially symmetrical or centrally symmetrical, so that the traction force of the lead 32 on the vibration component is symmetrically balanced, avoiding the vibration component being unbalanced due to the influence of the traction force, thereby causing rolling vibration. The connection between the lead 32 and the body 31 can be located on the short axis side of the body 31, on the long axis side of the body 31, or at the corner of the body 31.

[0048] Specifically, the lead wire 32 has at least one bending section 321, and the bending section 321 is located in the avoidance groove 6. During the vibration of the diaphragm assembly 2, the lead wire 32 will be deformed accordingly. It is easy to understand that the middle area of ​​the lead wire 32 is suspended and does not contact the yoke 4. It should be noted that the number of the bending sections 321 can be one or more, and can be set according to actual needs, such as Figure 2 and Figure 4 shown.

[0049] like Figure 3 As shown, for ease of assembly, the fixing platform 41 and the yoke 4 are an integrated structure formed by integral processing, and the specific methods of integral processing include but are not limited to insert injection molding, cutting and stamping molding, etc. Of course, in other embodiments, it is also acceptable that the fixing platform 41 and the yoke 4 are split structures. In this case, the fixing platform 41 and the yoke 4 are connected by adhesive, snap-fit ​​connection, welding or fasteners, and the fasteners include but are not limited to screws.

[0050] The central magnetic structure 5 includes a central magnetic steel 51 and a central washer 52, the bottom surface of the central magnetic steel 51 is connected to the yoke 4, the top surface of the central magnetic steel 51 is connected to the central washer 52, the avoidance groove 6 includes a first groove 61 provided on the central washer 52 and a second groove 62 provided on the central magnetic steel 51, the first groove 61 is connected to the top surface of the central washer 52, the bottom of the first groove 61 is connected to the top of the second groove 62, and the second groove 62 may be connected to or not connected to the bottom surface of the central magnetic steel 51.

[0051] The edge magnet structure includes a magnetic steel component and an edge washer, wherein the magnetic steel component connects the edge washer and the yoke 4, and the edge washer connects the basin frame 1. Figure 1 As shown, in this embodiment, the magnetic steel assembly is a continuous and complete annular magnetic steel 71.

[0052] like Figure 2 and Figure 4 As shown, in this embodiment, the cross-sectional width of the avoidance groove 6 near the main body 31 is smaller than the cross-sectional width of the avoidance groove 6 near the center of the central magnetic structure 5, and the bending section 321 of the lead 32 is located in the area with a larger cross-sectional width of the avoidance groove 6, which can effectively reduce the influence of the setting of the avoidance groove 6 on the magnetic field strength of the micro-speaker.

[0053] Embodiment 2

[0054] Please refer to Figure 5Embodiment 2 of the present utility model is a parallel technical solution of embodiment 1, and the only difference from embodiment 1 is that the shape of the avoidance groove 6 and the bending method of the lead 32 are different. In this embodiment, the cross-sectional width of the avoidance groove 6 close to the body 31 is equal to the cross-sectional width of the avoidance groove 6 close to the center of the central magnetic structure 5.

[0055] Optionally, in this embodiment, a receiving groove connected to the avoidance groove 6 is further provided on the central magnetic structure 5, and the fixing platform 41 is located in the receiving groove. In this embodiment, the receiving groove is cylindrical as a whole, and the diameter of the receiving groove is larger than the cross-sectional width of the avoidance groove 6.

[0056] Embodiment 3

[0057] Please refer to Figure 6 Embodiment 3 of the present invention is a parallel technical solution of Embodiment 1, and the only difference from Embodiment 1 is that the magnetic steel assembly includes at least two side magnetic steels 72, and the central magnetic structure 5 is located between at least one group of two side magnetic steels 72 that are relatively arranged.

[0058] In this embodiment, the number of the side magnetic steels 72 is four, and the four side magnetic steels 72 are arranged to form a ring frame structure.

[0059] Embodiment 4

[0060] Please refer to Figure 7 Embodiment 4 of the present invention is a parallel technical solution of embodiment 1, and the only difference from embodiment 1 is that the second groove 62 is connected to the bottom surface of the center magnet 51. At this time, the avoidance groove 6 also includes a third groove 63 provided on the top surface of the yoke 4. The bottom of the second groove 62 is connected to the top of the third groove 63. The existence of the third groove 63 can increase the activity space of the lead 32, thereby effectively avoiding the phenomenon that the lead 32 hits the yoke 4 and produces noise.

[0061] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include A voice coil, the voice coil comprising a body and a lead connected to each other, the lead being arranged corresponding to a hollow area of ​​the body; A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure being provided with an escape groove for escaping the lead wire, the yoke being provided with a fixing platform, the fixing platform being located in the escape groove; A via hole, the via hole comprising a first part and a second part connected to each other, the first part is arranged on the fixing platform and connected to the outer surface of the fixing platform, the second part is arranged on the yoke and connected to the bottom surface of the yoke, and an end of the lead wire away from the body passes through the bottom surface of the yoke through the via hole; A fixing structure is arranged on the fixing platform and connected to the lead wire to fix the lead wire.

2. The micro-speaker according to claim 1, characterized in that: The fixing structure is a buckle or fixing glue.

3. The micro-speaker according to claim 1, characterized in that: The fixing platform and the yoke are an integrated structure formed by integral processing.

4. The micro-speaker according to claim 1, characterized in that: The fixing platform and the yoke are split structures, and the fixing platform and the yoke are connected by gluing, snapping, welding or by fasteners.

5. The micro-speaker according to claim 1, characterized in that: The lead wire has at least one bending section, and the bending section is located in the avoidance groove.

6. The micro-speaker according to claim 5, characterized in that: The number of the bending sections is multiple.

7. The micro-speaker according to claim 1, characterized in that: The central magnetic structure includes a central magnetic steel and a central washer, the bottom surface of the central magnetic steel is connected to the yoke, the top surface of the central magnetic steel is connected to the central washer, the avoidance groove includes a first groove provided on the central washer and a second groove provided on the central magnetic steel, the first groove is connected to the top surface of the central washer, and the bottom of the first groove is connected to the top of the second groove.

8. The micro-speaker according to claim 7, characterized in that: The second groove is connected to the bottom surface of the central magnetic steel, and the avoidance groove also includes a third groove arranged on the top surface of the yoke, and the bottom of the second groove is connected to the top of the third groove.

9. The micro-speaker according to claim 1, characterized in that: A cross-sectional width of a region of the avoidance groove close to the body is smaller than a cross-sectional width of a region of the avoidance groove close to the center of the central magnetic structure.

10. The micro-speaker according to claim 1, characterized in that: The via hole is connected to the top surface of the fixing platform.

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