Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a magnetic circuit assembly, a voice coil, an insulating rubber block, a conductive structural member and a conductive connecting member, and is characterized in that the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is provided with an avoiding groove, and the central area of the yoke is provided with a through hole; the insulating rubber block is arranged at the through hole and is positioned in the avoiding groove; the conductive structural member is arranged on the insulating rubber block, and the bottom of the conductive structural member is exposed out of the through hole to form an exposed bonding pad; the conductive connecting piece is located in the avoiding groove, and the conductive connecting piece is electrically connected with the voice coil and the conductive structural piece. The miniature loudspeaker is novel in structure, and the electric conduction position of the miniature loudspeaker is located in the central area of the bottom surface of the yoke, so that the miniature loudspeaker can effectively adapt to some electronic products with special spatial layout, the design flexibility of the electronic products is higher, and the acoustic performance of the miniature loudspeaker can be effectively 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, the power connection position of the micro speaker is generally located near the edge, specifically on the basin frame. In some special application scenarios (such as the internal space layout limitations of the electronic equipment), the power connection position of the micro speaker is sometimes required to be in the middle area of ​​the bottom surface of the yoke. The existing micro speakers are obviously unable to meet this requirement. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a novel micro loudspeaker whose electrical connection position is located in the middle area of ​​the bottom surface of the yoke.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a micro speaker, comprising:

[0005] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is provided with an avoidance groove, and a through hole is provided in the central area of ​​the yoke;

[0006] a voice coil, the voice coil being arranged corresponding to the central magnetic structure;

[0007] An insulating rubber block, the insulating rubber block is arranged at the through hole and located in the avoidance groove;

[0008] A conductive structure, wherein the conductive structure is disposed on the insulating rubber block, and the bottom of the conductive structure is exposed from the through hole to form an exposed pad;

[0009] A conductive connecting member is located in the avoidance groove, and is electrically connected to the voice coil and the conductive structural member respectively.

[0010] In one embodiment, the conductive structure and the insulating rubber block are an integrated structure formed by insert injection molding; or,

[0011] The insulating rubber block is connected to the conductive structure by snapping or gluing.

[0012] In one embodiment, the conductive structure is C-shaped, rectangular frame-shaped or column-shaped.

[0013] In one embodiment, a wire groove communicating with the through hole is provided on the bottom surface of the yoke.

[0014] In one embodiment, the yoke further has an annular frame arranged along the edge of the through hole, the annular frame is located on a side of the yoke close to the central magnetic structure, and the insulating rubber block is fixed in the annular frame.

[0015] In one embodiment, the conductive connecting member is a lead wire connected to the voice coil, a centering support plate with a conductive circuit, or a secondary membrane with a conductive path.

[0016] In one embodiment, the number of the conductive connecting members is two, and the two conductive connecting members are axially symmetrical or centrally symmetrical.

[0017] In one embodiment, the connection point between the conductive connecting member and the voice coil is located at the long axis side, short axis side or corner of the voice coil.

[0018] In one embodiment, the yoke is provided with a clearance groove for avoiding the conductive connecting member.

[0019] In one embodiment, a cross-sectional width of a region of the avoidance groove close to the voice coil is smaller than a cross-sectional width of a region of the avoidance groove close to the insulating rubber block.

[0020] The beneficial effects of the utility model are as follows: the micro speaker has a novel structure, and its electrical connection position is located in the central area of ​​the bottom surface of the yoke, so that it can effectively adapt to some electronic products with special spatial layouts, thereby making the design of electronic products more flexible. In addition, the micro speaker can simultaneously adopt a large voice coil and a large amplitude design architecture, and while the voice coil can be maximized, the conductive connector can also have a sufficient suspension length, thereby effectively improving the acoustic performance of the micro speaker. 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 3 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0025] Figure 4This is a schematic diagram of the overall structure of the micro-speaker according to the first embodiment of the present 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 This is a schematic diagram of the internal structure of a micro speaker according to Embodiment 3 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;

[0033] 4. Insulation rubber block;

[0034] 5. Conductive structural parts; 51. Exposed pads;

[0035] 6. Conductive connectors;

[0036] 7. yoke; 71. through hole; 72. wire slot; 73. ring frame;

[0037] 8. Central magnetic structure; 81. Avoidance slot;

[0038] 9. Edge magnetic structure;

[0039] 10. Fixing glue. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Embodiment 1

[0047] Please refer to Figures 1 to 4, the first embodiment of the utility model is: a micro speaker, including a basin frame 1, a vibration component magnetic circuit component, an insulating rubber block 4, a conductive structure 5 and a conductive connector 6, the vibration component includes 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 includes a sound membrane and a ball top arranged on the sound membrane, in other embodiments, the diaphragm component 2 only has the sound membrane without the ball top, which can be selected and set according to actual needs; the magnetic circuit component includes a yoke 7 and respectively arranged on the yoke 7 The central magnetic structure 8 and the side magnetic structure 9, the central magnetic structure 8 is provided with an avoidance groove 81, the two ends of the avoidance groove 81 are respectively connected to the outer wall surface of the central magnetic structure 8, the central area of ​​the yoke 7 is provided with a through hole 71, the insulating rubber block 4 is arranged at the through hole 71 and is located in the avoidance groove 81, the conductive structure 5 is arranged on the insulating rubber block 4, the bottom of the conductive structure 5 is exposed in the through hole 71 to form an exposed pad 51, the conductive connecting member 6 is located in the avoidance groove 81, and the conductive connecting member 6 is electrically connected to the voice coil 3 and the conductive structure 5 respectively.

[0048] The side magnetic structure 9 is arranged around the central magnetic structure 8. The side magnetic structure 9 is connected to the basin frame 1. A magnetic gap is formed between the side magnetic structure 9 and the central magnetic structure 8 for the voice coil 3 to move. In other words, the voice coil 3 is arranged corresponding to the central magnetic structure 8.

[0049] In order to facilitate processing and manufacturing and reduce the assembly cost of the micro speaker, preferably, the conductive structure 5 and the insulating rubber block 4 are an integrated structure of insert injection molding. In other embodiments, the insulating rubber block 4 and the conductive structure 5 can be connected by snapping, gluing or other fixed connection. It is easy to understand that the conductive structure 5 is not in contact with the yoke 7, and preferably, the conductive structure 5 and the yoke 7 are isolated by a partial area of ​​the insulating rubber block 4.

[0050] The conductive structure 5 is in a C-shape, a rectangular frame shape, a column shape or other shapes, which can be selected according to actual needs. Optionally, the conductive structure 5 is made of copper.

[0051] In order to facilitate the external wiring of the micro speaker, the bottom surface of the yoke 7 is provided with a wire groove 72 connected to the through hole 71, and the wire groove 72 is used to accommodate external wires, and the external wires are welded and connected to the exposed pad 51, so as to supply power to the voice coil 3. Optionally, one end of the wire groove 72 away from the through hole 71 is connected to the outer peripheral wall of the yoke 7.

[0052] In order to improve the stability of the connection between the insulating rubber block 4 and the yoke 7, the yoke 7 also has a ring frame 73 arranged along the edge of the through hole 71, and the ring frame 73 is located on the side of the yoke 7 close to the central magnetic structure 8. The insulating rubber block 4 is fixed in the ring frame 73. The existence of the ring frame 73 effectively increases the contact area between the insulating rubber block 4 and the yoke 7, thereby improving the bonding force between the two, and achieving the effect of enhancing the structural stability of the micro speaker. To facilitate the assembly of the micro speaker, in this embodiment, the ring frame 73 is stamped and formed by a partial area of ​​the yoke 7. In other embodiments, the ring frame 73 can be fixedly connected to the yoke 7 by gluing, welding or other methods.

[0053] There are two conductive connectors 6, and the two conductive connectors 6 are axially symmetrical or centrally symmetrical, so that the traction force of the conductive connector 6 on the vibration component is symmetrically balanced, avoiding the imbalance of the vibration component due to the influence of the traction force, and then causing rolling vibration.

[0054] The connection between the conductive connector 6 and the voice coil 3 is located at the long axis side, short axis side or corner of the voice coil 3 , and can be specifically set according to actual needs. In this embodiment, the connection between the conductive connector 6 and the voice coil 3 is located at the short axis side of the voice coil 3 .

[0055] In order to fully avoid the conductive connector 6, in this embodiment, the avoidance groove 81 connects the top surface and the bottom surface of the central magnetic structure 8. Specifically, the central magnetic structure 8 includes a central magnetic steel and a central washer located above the central magnetic steel, the central magnetic steel connects the central washer and the yoke 7, and the avoidance groove 81 extends from the top surface of the central washer to the direction close to the yoke 7. The avoidance groove 81 is connected to the bottom surface of the central magnetic structure 8, which means that the avoidance groove 81 is connected to the bottom surface of the central magnetic steel. However, in some products, it is also possible that the avoidance groove 81 is not connected to the bottom surface of the central magnetic steel. In this case, the assembly of the central magnetic steel and the yoke 7 can be facilitated. In some embodiments, when the avoidance groove 81 connects the top surface and the bottom surface of the central magnetic structure 8, an avoidance groove for avoiding the conductive connector 6 may also be provided on the yoke 7. The avoidance groove may be either a blind groove or a through groove. The existence of the avoidance groove can increase the distance between the conductive connector 6 and the yoke 7, thereby avoiding the collision between the conductive connector 6 and the yoke 7 during the operation of the micro-speaker, which is beneficial to improving the reliability margin of the micro-speaker.

[0056] The edge magnetic structure 9 includes an edge magnetic steel and an edge washer located above the edge magnetic steel, the edge magnetic steel connects the edge washer and the yoke 7, and the edge washer connects the basin frame 1. In other embodiments, the edge magnetic structure 9 can also be replaced by a flange formed by bending the edge area of ​​the yoke 7.

[0057] Optionally, the cross-sectional width of the avoidance groove 81 near the voice coil 3 is smaller than the cross-sectional width of the avoidance groove 81 near the insulating rubber block 4, and the conductive connector 6 has at least one bending portion, which is used to provide a deformation margin, and the bending portion is located in the area where the cross-sectional width of the avoidance groove 81 is larger. This can effectively reduce the influence of the setting of the avoidance groove 81 on the magnetic field strength of the micro-speaker.

[0058] In this embodiment, the conductive connecting member 6 is a lead wire connected to the voice coil 3, and the lead wire and the voice coil 3 are an integrated structure. In order to avoid the lead wire colliding with the ring frame 73 and generating noise during the vibration of the micro speaker, optionally, a partial area of ​​the lead wire is fixed to the ring frame 73 by fixing glue 10.

[0059] Embodiment 2

[0060] Please refer to Figure 5 Embodiment 2 of the present invention is a parallel technical solution of embodiment 1, and is different from embodiment 1 in that the conductive connecting member 6 is a centering support plate with a conducting circuit, which not only corrects the deviation of the voice coil 3, but also transmits electrical energy to the voice coil 3.

[0061] Embodiment 3

[0062] Please refer to Figure 6 The third embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that the conductive connecting member 6 is a secondary film with a conductive path, the secondary film itself plays a role in correcting the voice coil 3, and the conductive path on the secondary film plays a role in transmitting electrical energy to the voice coil 3. At this time, the secondary film is fixedly connected to the insulating rubber block 4 and / or the ring frame 73 by the fixing glue 10.

[0063] Embodiment 4

[0064] Please refer to Figure 7 The fourth embodiment of the present utility model is a parallel technical solution of the first embodiment, and is different from the first embodiment in that: the yoke 7 does not have a ring frame, and a partial area of ​​the insulating colloid is embedded in the through hole 71 of the yoke 7.

[0065] 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 magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is provided with an avoidance groove, and a through hole is provided in the central area of ​​the yoke; a voice coil, the voice coil being arranged corresponding to the central magnetic structure; An insulating rubber block, the insulating rubber block is arranged at the through hole and located in the avoidance groove; A conductive structure, wherein the conductive structure is disposed on the insulating rubber block, and the bottom of the conductive structure is exposed from the through hole to form an exposed pad; A conductive connecting member is located in the avoidance groove, and is electrically connected to the voice coil and the conductive structural member respectively.

2. The micro-speaker according to claim 1, characterized in that: The conductive structural member and the insulating rubber block are an integrated structure formed by insert injection molding; or, The insulating rubber block is connected to the conductive structure by snapping or gluing.

3. The micro-speaker according to claim 1, characterized in that: The conductive structure is in a C-shape, a rectangular frame shape or a column shape.

4. The micro-speaker according to claim 1, characterized in that: The bottom surface of the yoke is provided with a wire groove communicating with the through hole.

5. The micro-speaker according to claim 1, characterized in that: The yoke also has an annular frame arranged along the edge of the through hole. The annular frame is located on a side of the yoke close to the central magnetic structure, and the insulating rubber block is fixed in the annular frame.

6. The micro-speaker according to claim 1, characterized in that: The conductive connecting member is a lead wire connected to the voice coil, a centering support plate with a conducting circuit, or a secondary membrane with a conductive path.

7. The micro-speaker according to claim 1, characterized in that: The number of the conductive connecting members is two, and the two conductive connecting members are axially symmetrical or centrally symmetrical.

8. The micro-speaker according to claim 1, characterized in that: The connection point between the conductive connecting member and the voice coil is located at the long axis side, short axis side or corner of the voice coil.

9. The micro-speaker according to claim 1, characterized in that: The yoke is provided with a clearance groove for avoiding the conductive connecting member.

10. The micro-speaker according to claim 1, characterized in that: The cross-sectional width of the avoidance groove in a region close to the voice coil is smaller than the cross-sectional width of the avoidance groove in a region close to the insulating rubber block.

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