Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a centering disk and a magnetic circuit assembly, and the frame is in the shape of a rectangular frame; the four corners of the basin stand are respectively provided with a centering support chip, and two centering support chips are provided with inner bonding pads; the magnetic circuit assembly comprises a central magnetic steel and two first side magnetic steels, the central magnetic steel is located between the two first side magnetic steels which are arranged in parallel, the first side magnetic steels have a first central cross section perpendicular to the first direction, and the central magnetic steel has a second central cross section perpendicular to the first direction; the first central cross-section is offset in a direction away from the inner pad relative to the second central cross-section. The miniature loudspeaker is novel in structure, only the two centering disks are provided with the inner bonding pads, so that more setting space is reserved for the first edge magnetic steel, the total volume of the first edge magnetic steel can be set to be larger, the magnetic field intensity of the miniature loudspeaker is enhanced, the BL value of the miniature loudspeaker is improved, and the acoustic performance of the miniature loudspeaker is improved.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a miniature loudspeaker. Background Technology

[0002] Miniature loudspeakers are widely used in electronic devices such as mobile phones, laptops, and smartwatches. A miniature loudspeaker includes a magnetic circuit assembly and a voice coil. The magnetic circuit assembly includes a yoke and a central magnet and side magnets respectively mounted on the yoke. The central magnet is located between at least one set of two opposing side magnets. To facilitate manufacturing, existing technologies often employ both centrosymmetric and planar symmetric magnetic circuit assemblies. To correct the voice coil's deviation, some miniature loudspeakers have centering supports at each of the four corners. These centering supports connect the frame to the voice coil and have internal solder pads that are conductively welded to the voice coil. The distribution of these four centering supports is both centrosymmetric and planar symmetric. However, since voice coils typically only have two leads, having internal solder pads on each of the four centering supports not only wastes material but also excessively encroaches on the internal space of the miniature loudspeaker, preventing the side magnets from being larger and resulting in unsatisfactory acoustic performance. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a high-performance miniature loudspeaker.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0005] A basin stand, wherein the basin stand is rectangular in shape;

[0006] Centering supports are installed at the four corners of the basin frame, wherein two of the centering supports have inner welding pads;

[0007] A magnetic circuit assembly includes a central magnet and two first side magnets. The central magnet is located between the two parallel first side magnets. The first side magnets have a first central cross-section perpendicular to a first direction. The central magnet has a second central cross-section perpendicular to the first direction. The first central cross-section is offset relative to the second central cross-section in a direction away from the inner pad.

[0008] In one embodiment, the central magnet has a third central cross section parallel to the first direction, and the two first side magnets are symmetrically arranged with respect to the third central cross section.

[0009] In one embodiment, the two first side magnets are centrally symmetrical.

[0010] In one embodiment, the inner pad extends outward toward the end of the first side magnet adjacent to it.

[0011] In one embodiment, at least two of the centering supports are connected to form an integral structure.

[0012] In one embodiment, the system further includes a voice coil, which includes a connected body and leads, the leads being soldered to the inner pad for electrical connection.

[0013] In one embodiment, the centering support includes an inner mounting portion, a cantilever portion, and an outer mounting portion connected in sequence. The inner mounting portion is fixedly connected to the voice coil. An inner solder pad is disposed on the inner mounting portion. An outer solder pad that is conductive to the inner solder pad is disposed on the outer mounting portion. The outer mounting portion is fixedly connected to the frame.

[0014] In one embodiment, a diaphragm assembly is also included, the diaphragm assembly connecting the voice coil and the frame.

[0015] In one embodiment, the magnetic circuit assembly further includes a yoke, wherein the central magnet and the first side magnet are respectively connected to the yoke.

[0016] In one embodiment, the magnetic circuit assembly further includes a first side washer that connects the first side magnet to the basin stand.

[0017] The beneficial effects of this utility model are as follows: This miniature loudspeaker has a novel structure. Compared with the existing magnetic circuit components / centering support plates that are centrally symmetrical and planar symmetrical, in this miniature loudspeaker, only two centering support plates have inner welding pads, thereby providing more space for the first side magnet. This allows the overall volume of the first side magnet to be set larger, which is beneficial to enhance the magnetic field strength of the miniature loudspeaker, increase the BL value of the miniature loudspeaker, and achieve the effect of improving the acoustic performance of the miniature loudspeaker. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the miniature speaker after the yoke is hidden in Embodiment 1 of this utility model;

[0020] Figure 2 for Figure 1 The bottom view of the structure shown.

[0021] Explanation of icon numbers:

[0022] 1. Pot stand;

[0023] 2. Centering support; 21. Inner welding pad; 22. Inner mounting part; 23. Cantilever part; 24. Outer mounting part;

[0024] 31. Diaphragm assembly; 32. Voice coil;

[0025] 41. Central magnet; 42. First side magnet;

[0026] 51. First central section; 52. Second central section; 53. Third central section. Detailed Implementation

[0027] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0031] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Example 1

[0034] Please refer to Figure 1 and Figure 2 The first embodiment of this utility model is a miniature loudspeaker, including a frame 1, centering supports 2, a vibration assembly, and a magnetic circuit assembly. The frame 1 is rectangular, and the centering supports 2 are respectively installed at the four corners of the frame 1. Two of the centering supports 2 have inner solder pads 21. The vibration assembly includes a diaphragm assembly 31 and a voice coil 32. The voice coil 32 includes a connected body and a lead wire. The lead wire is soldered to the inner solder pads 21 for conductivity. The diaphragm assembly 31 connects the voice coil 32 and the frame 1. The magnetic circuit assembly includes a yoke and a central magnetic structure and a first side magnetic structure respectively disposed on the yoke. The central magnetic structure is located between the two first side magnetic structures. The central magnetic structure includes a central magnet 41 and a central washer. The first side magnet structure includes a first side magnet 42 and a first side washer, which are located above the central magnet 41. The first side magnet 42 is connected to the yoke and the first side washer, and the first side washer is connected to the basin frame 1. Specifically, the central magnet 41 is located between two parallel first side magnets 42. The first side magnet 42 has a first central section 51 perpendicular to the first direction, and the central magnet 41 has a second central section 52 perpendicular to the first direction. The first central section 51 is offset away from the inner pad 21 relative to the second central section 52.

[0035] The inner solder pad 21 extends outward toward the end of the first side magnet 42 closest to it. To understand this technical solution in another way, assuming the first central section 51 and the second central section 52 originally coincided, the length of the first side magnet 42 was reduced because it needed to avoid the inner solder pad 21, causing the first central section 51 to shift relative to the second central section 52. In existing miniature loudspeakers, since each of the four centering supports 2 has an inner solder pad 21, both ends of the first side magnet 42 are reduced, so that the first central section 51 and the second central section 52 still coincide. In other words, compared to the prior art, this technical solution is equivalent to extending the end of the first side magnet 42 away from the inner solder pad 21, thereby increasing the overall volume of the first side magnet 42.

[0036] In this embodiment, the central magnet 41 has a third central cross-section 53 parallel to the first direction, and the two first side magnets 42 are symmetrically arranged with respect to the third central cross-section 53. In other embodiments, the two first side magnets 42 can also be centrally symmetrical, that is, the offset direction of the first central cross-section 51 of the two first side magnets 42 relative to the second central cross-section 52 is opposite.

[0037] Figure 2 In the diagram, dense dashed lines represent the first central section 51, sparse dashed lines represent the second central section 52, and dotted lines represent the third central section 53.

[0038] In this embodiment, the four centering support plates 2 are discrete structures, while in other embodiments, it is acceptable for at least two of the centering support plates 2 to be connected to form an integral structure.

[0039] The centering support 2 includes an inner mounting part 22, a cantilever part 23 and an outer mounting part 24 connected in sequence. The inner mounting part 22 is fixedly connected to the voice coil 32. The inner solder pad 21 is provided on the inner mounting part 22. The outer mounting part 24 is provided with an outer solder pad that is in communication with the inner solder pad 21. The outer mounting part 24 is fixedly connected to the frame 1.

[0040] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A miniature loudspeaker, characterized in that: include A basin stand, wherein the basin stand is rectangular in shape; Centering supports are installed at the four corners of the basin frame, wherein two of the centering supports have inner welding pads; A magnetic circuit assembly includes a central magnet and two first side magnets. The central magnet is located between the two parallel first side magnets. The first side magnets have a first central cross-section perpendicular to a first direction. The central magnet has a second central cross-section perpendicular to the first direction. The first central cross-section is offset relative to the second central cross-section in a direction away from the inner pad.

2. The miniature loudspeaker according to claim 1, characterized in that: The central magnet has a third central cross section parallel to the first direction, and the two first side magnets are symmetrically arranged with respect to the third central cross section.

3. The miniature loudspeaker according to claim 1, characterized in that: The two first-side magnets are centrally symmetrical.

4. The miniature loudspeaker according to claim 1, characterized in that: The inner pad extends outward toward the end of the first side magnet that is close to it.

5. The miniature loudspeaker according to claim 1, characterized in that: At least two of the aforementioned centering supports are connected to form an integral structure.

6. The miniature loudspeaker according to claim 1, characterized in that: It also includes a voice coil, which comprises a connected body and leads, the leads being soldered to the inner pad for electrical connection.

7. The miniature loudspeaker according to claim 6, characterized in that: The centering support includes an inner mounting part, a cantilever part, and an outer mounting part connected in sequence. The inner mounting part is fixedly connected to the voice coil. The inner solder pad is provided on the inner mounting part. The outer mounting part is provided with an outer solder pad that is in communication with the inner solder pad. The outer mounting part is fixedly connected to the frame.

8. The miniature loudspeaker according to claim 6, characterized in that: It also includes a diaphragm assembly that connects the voice coil to the frame.

9. The miniature loudspeaker according to claim 1, characterized in that: The magnetic circuit assembly also includes a yoke, and the central magnet and the first side magnet are respectively connected to the yoke.

10. The miniature loudspeaker according to claim 1, characterized in that: The magnetic circuit assembly also includes a first side washer, which connects the first side magnet to the basin stand.

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