Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a metal frame and a magnetic circuit assembly, and is characterized in that the metal frame is provided with a notch, and the notch is communicated with the bottom surface of the metal frame; the magnetic circuit assembly comprises a yoke and an edge magnetic structure, the edge magnetic structure is integrally shaped like a Chinese character'tu ', a part of area of the edge magnetic structure extends into the notch, the edge magnetic structure comprises edge magnetic steel and an edge washer, the edge magnetic steel is connected with the edge washer and the yoke, and the area, extending into the notch, of the edge washer is welded and fixed to the metal frame. The miniature loudspeaker is novel in structure, the wall thickness of the metal basin stand can be smaller than that of the plastic basin stand under the condition of the same outer contour size and the same structural strength, so that the size of the edge magnetic structure can be set to be larger, the BL value of the miniature loudspeaker is improved, the acoustic performance of the miniature loudspeaker is improved, and in addition, the size of the edge magnetic structure is reduced. In addition, the metal basin frame and the side washer are fixed by welding, so that the metal basin frame and the side washer can be connected more stably, and the structural stability of the micro 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 speakers are widely used in electronic devices such as mobile phones, laptops, and smartwatches.

[0003] In existing technologies, the frame and edge washer of miniature loudspeakers are generally glued together. However, some miniature loudspeakers, in order to increase the volume of the edge magnetic structure in the magnetic circuit assembly, will choose to set a notch in the frame to allow part of the edge magnetic structure to protrude. In this case, the edge magnetic structure is convex in shape. The inner top surface of the notch on the frame is glued to the top surface of the edge washer. In order to improve the stability of the bonding between the frame and the edge washer, the frame is made thicker, so that there is a larger bonding area between the inner top surface of the notch and the edge washer. However, the thicker frame will cause the frame to occupy too much space, so that the volume of the edge magnetic structure cannot be set larger, resulting in unsatisfactory acoustic performance of the miniature loudspeaker. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a miniature loudspeaker with good acoustic performance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0006] A metal basin stand, wherein the metal basin stand has a notch that connects to the bottom surface of the metal basin stand;

[0007] A magnetic circuit assembly, comprising a yoke and a side magnetic structure, wherein the side magnetic structure is generally convex in shape, and a portion of the side magnetic structure extends into the notch; the side magnetic structure includes a side magnet and a side washer, the side magnet connecting the side washer and the yoke; and the portion of the side washer extending into the notch is welded and fixed to the metal basin frame.

[0008] In one embodiment, the washer includes a protrusion and a recessed portion connected together. The protrusion is located in the notch, and the recessed portion is located inside the metal basin frame. The length of the protrusion is less than the length of the recessed portion, so that the washer is U-shaped. The top of the protrusion is welded to the top edge of the notch.

[0009] In one embodiment, at least one end of the protrusion is welded to the side of the notch.

[0010] In one embodiment, one end of the protrusion is welded to one side of the notch, and the other end of the protrusion is welded to the other side of the notch.

[0011] In one embodiment, the top of the protrusion forms a first weld with the top edge of the notch, and the end of the protrusion forms a second weld with the side edge of the notch, wherein the first weld and the second weld are connected.

[0012] In one embodiment, the inner region of the top surface of the edge washer is provided with a clearance groove.

[0013] In one embodiment, the device further includes a vibration assembly comprising a connected diaphragm assembly and a voice coil, the voice coil being located inside the metal frame, and the diaphragm assembly being connected to the metal frame.

[0014] In one embodiment, a centering support is further included, the top surface of which is connected to the bottom surface of the metal frame.

[0015] In one embodiment, the yoke has a flange, the top surface of which is bonded and fixed to the bottom surface of the centering support plate.

[0016] In one embodiment, the centering support includes an inner mounting portion, a cantilever portion, and an outer mounting portion connected in sequence. The outer mounting portion is connected to the metal frame and the flange, and has an exposed outer solder pad. The inner mounting portion is fixedly connected to the voice coil and has an inner solder pad that is soldered and connected to the voice coil. The inner solder pad is connected to the outer solder pad.

[0017] The beneficial effects of this utility model are as follows: This miniature loudspeaker has a novel structure. Under the same outer contour size and structural strength, the wall thickness of the metal frame can be made smaller than that of the plastic frame, thereby allowing the volume of the side magnet structure to be set larger, which in turn improves the BL value of the miniature loudspeaker and enhances its acoustic performance. Moreover, since the metal frame and the side washer are welded and fixed, the metal frame and the side washer can also form a more stable connection, which is conducive to improving the structural stability 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 overall structure of the miniature loudspeaker according to Embodiment 1 of this utility model;

[0020] Figure 2 This is a front view of the miniature loudspeaker according to Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the miniature loudspeaker according to Embodiment 1 of this utility model.

[0022] Explanation of icon numbers:

[0023] 1. Metal basin stand; 11. Notch;

[0024] 2. Magnetic circuit assembly; 21. Yoke; 211. Flanged edge; 22. Side magnetic structure; 221. Side magnet; 222. Side washer; 2221. Protrusion; 2222. Concealed part; 2223. Clearance groove; 23. Central magnetic structure;

[0025] 3. Vibrating assembly; 31. Diaphragm assembly; 32. Voice coil;

[0026] 41. First weld; 42. Second weld;

[0027] 5. Centering support. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 1

[0035] Please refer to Figures 1 to 3 Embodiment 1 of this utility model is a miniature loudspeaker, comprising a metal frame 1, a magnetic circuit assembly 2, and a vibration assembly 3. The vibration assembly 3 includes a connected diaphragm assembly 31 and a voice coil 32. The voice coil 32 is located inside the metal frame 1, and the diaphragm assembly 31 is connected to the metal frame 1. The metal frame 1 has a notch 11, which communicates with the bottom surface of the metal frame 1. The magnetic circuit assembly 2 includes a yoke 21, a side magnetic structure 22, and a central magnetic structure 23. The central magnetic structure 23 is located between at least one set of two oppositely arranged side magnetic structures 22, and a power supply is formed between the central magnetic structure 23 and the side magnetic structures 22. The voice coil 32 has a movable magnetic gap; the central magnetic structure 23 includes a central magnet and a central washer, the central washer being located above the central magnet, and the central magnet connecting the central washer and the yoke 21 respectively; the side magnetic structure 22 is generally convex in shape, with a portion of the side magnetic structure 22 extending into the notch 11, the side magnetic structure 22 including a side magnet 221 and a side washer 222, the side washer 222 being located above the side magnet 221, the side magnet 221 connecting the side washer 222 and the yoke 21, and the portion of the side washer 222 extending into the notch 11 being welded and fixed to the metal frame 1.

[0036] In detail, the washer 222 includes a protrusion 2221 and a recessed portion 2222 connected together. The protrusion 2221 is located in the notch 11, and the recessed portion 2222 is located on the inner side of the metal basin frame 1. The length of the protrusion 2221 is less than the length of the recessed portion 2222, so that the washer 222 is convex in shape. That is, the protrusion 2221 is located on the outer side of the long side of the recessed portion 2222 and connected to the long side of the recessed portion 2222. The top of the protrusion 2221 is welded to the top edge of the notch 11.

[0037] To further improve the stability of the connection between the washer 222 and the metal basin frame 1, optionally, at least one end of the protrusion 2221 is welded to the side of the notch 11. Preferably, one end of the protrusion 2221 is welded to one side of the notch 11, and the other end of the protrusion 2221 is welded to the other side of the notch 11; that is, the two ends of the protrusion 2221 correspond one-to-one with the two sides of the notch 11 and are welded and fixed.

[0038] In one or more embodiments, the top of the protrusion 2221 forms a first weld 41 with the top edge of the notch 11, and the end of the protrusion 2221 forms a second weld 42 with the side edge of the notch 11. The first weld 41 is connected to the second weld 42, and the first weld 41 and the two second welds 42 connected thereto form a U-shaped structure rotated 90° clockwise.

[0039] In some embodiments, to prevent the diaphragm assembly 31 from colliding with the edge washer 222 during vibration and thus generating noise, the inner side region of the top surface of the edge washer 222 is provided with a relief groove 2223.

[0040] Optionally, the miniature loudspeaker further includes a centering bracket 5 connected to the voice coil 32, the top surface of which is connected to the bottom surface of the metal frame 1. To improve the stability of the centering bracket 5 during installation, the yoke 21 has a flange 211, the top surface of which is bonded and fixed to the bottom surface of the centering bracket 5.

[0041] Specifically, the centering support 5 includes an inner mounting part, a cantilever part, and an outer mounting part connected in sequence. The outer mounting part is connected to the metal frame 1 and the flange 211 respectively. The outer mounting part has an exposed outer solder pad. The inner mounting part is fixedly connected to the voice coil 32. The inner mounting part has an inner solder pad that is welded and connected to the voice coil 32. The inner solder pad is connected to the outer solder pad.

[0042] 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 metal basin stand, wherein the metal basin stand has a notch that connects to the bottom surface of the metal basin stand; A magnetic circuit assembly, comprising a yoke and a side magnetic structure, wherein the side magnetic structure is generally convex in shape, and a portion of the side magnetic structure extends into the notch; the side magnetic structure includes a side magnet and a side washer, the side magnet connecting the side washer and the yoke; and the portion of the side washer extending into the notch is welded and fixed to the metal basin frame.

2. The miniature loudspeaker according to claim 1, characterized in that: The washer includes a protruding part and a concealed part connected together. The protruding part is located in the notch, and the concealed part is located inside the metal basin frame. The length of the protruding part is less than the length of the concealed part, so that the washer is convex in shape. The top of the protruding part is welded to the top edge of the notch.

3. The miniature loudspeaker according to claim 2, characterized in that: At least one end of the protrusion is welded to the side of the notch.

4. The miniature loudspeaker according to claim 3, characterized in that: One end of the protrusion is welded to one side of the notch, and the other end of the protrusion is welded to the other side of the notch.

5. The miniature loudspeaker according to claim 4, characterized in that: The top of the protrusion forms a first weld with the top edge of the notch, and the end of the protrusion forms a second weld with the side edge of the notch. The first weld and the second weld are connected.

6. The miniature loudspeaker according to claim 1, characterized in that: The inner side of the top surface of the edge is provided with a clearance groove.

7. The miniature loudspeaker according to claim 1, characterized in that: It also includes a vibration assembly, which includes a connected diaphragm assembly and a voice coil, the voice coil being located inside the metal frame, and the diaphragm assembly being connected to the metal frame.

8. The miniature loudspeaker according to claim 7, characterized in that: It also includes a centering support plate connected to the voice coil, the top surface of which is connected to the bottom surface of the metal frame.

9. The miniature loudspeaker according to claim 8, characterized in that: The yoke has a flange, and the top surface of the flange is bonded and fixed to the bottom surface of the centering support plate.

10. The miniature loudspeaker according to claim 9, characterized in that: The centering support includes an inner mounting part, a cantilever part, and an outer mounting part connected in sequence. The outer mounting part is connected to the metal frame and the flange respectively. The outer mounting part has an exposed outer solder pad. The inner mounting part is fixedly connected to the voice coil. The inner mounting part has an inner solder pad that is soldered and connected to the voice coil. The inner solder pad is connected to the outer solder pad.

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