Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a voice coil, a basin stand, a magnetic circuit assembly and a shaping support chip, the magnetic circuit assembly is connected with the basin stand, the magnetic circuit assembly comprises a yoke and an edge magnetic structure arranged on the yoke, and the edge magnetic structure is provided with an avoiding gap; the shaping support chip is located at the avoiding gap and comprises an inner mounting part, a cantilever part and an outer mounting part which are connected in sequence, the inner mounting part is fixedly connected with the voice coil, the outer mounting part is fixedly connected with the basin frame, and a first lead bonding pad and a second lead bonding pad are arranged on the front surface of the inner mounting part; a first external bonding pad and a second external bonding pad are arranged on the back face of the outer installation part, a first wire is arranged on the front face of the shaping support chip, the first wire is communicated with the first lead bonding pad and is communicated with the first external bonding pad through a first via hole, and a second wire is arranged on the back face of the shaping support chip and is communicated with the second external bonding pad through a second via hole. And the second wire is conducted with the second lead bonding pad through the second conducting hole, and the second wire is conducted with the second external bonding pad. The sounding unit is high in sensitivity, and the cantilever part of the shaping support chip is thin.

Description

Sound unit Technical Field

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

[0002] As electronic devices such as mobile phones and tablets become smaller and thinner, the installation space left for sound-emitting units is getting smaller and smaller. However, the sensitivity requirements for sound-emitting units are also increasing. Therefore, how to improve the sensitivity of sound-emitting units under the constraints of product structure and size has become a difficult problem that industry technicians need to overcome.

[0003] Existing drivers typically have shaped supports installed at the four corners of the voice coil. These supports are fixedly connected to the frame. Some drivers also require the use of these supports for circuit routing. The presence of four shaped supports in a driver undoubtedly occupies a significant amount of space for the side magnet structure, resulting in a smaller overall volume of the side magnet structure. Consequently, the overall BL value of the driver is low, and the sensitivity of the driver unit is low. Summary of the Invention

[0004] The technical problem solved by this utility model is to provide a high-sensitivity sound-generating unit.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a sound-generating unit, including a voice coil, a frame, a magnetic circuit assembly, and a shaping support; the magnetic circuit assembly is connected to the frame, and the magnetic circuit assembly includes a yoke and a side magnetic structure disposed on the yoke, the side magnetic structure having a clearance gap; the shaping support is located at the clearance gap, and the shaping 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, and the outer mounting part is fixedly connected to the frame; the inner... The front of the mounting part is provided with a first lead pad and a second lead pad. The back of the external mounting part is provided with a first external pad and a second external pad. The front of the shaping support piece is provided with a first trace, one end of which is connected to the first lead pad, and the other end of which is connected to the first external pad through a first through hole. The back of the shaping support piece is provided with a second trace, one end of which is connected to the second lead pad through a second through hole, and the other end of which is connected to the second external pad.

[0006] In one embodiment, the number of cantilever portions in the shaping support is one.

[0007] In one embodiment, the voice coil is generally rectangular, and the clearance is provided at one corner of the voice coil.

[0008] In one embodiment, the edge magnetic structure includes an edge magnet, which is an integrally formed structure.

[0009] In one embodiment, the edge magnetic structure includes four edge magnetic components, each edge magnetic component comprising an edge magnet, and the clearance gap is located between two of the edge magnets.

[0010] In one embodiment, the magnetic circuit assembly further includes a central magnetic structure disposed on the yoke, the side magnetic structure being disposed around the central magnetic structure, a magnetic gap being formed between the central magnetic structure and the side magnetic structure for the voice coil to move, and the clearance gap communicating with the magnetic gap.

[0011] In one embodiment, the first via is a metallized via.

[0012] In one embodiment, the second via is a metallized via.

[0013] The beneficial effects of this invention are as follows: The sound-generating unit has a novel structure. The side magnetic structure of the sound-generating unit has only one clearance gap. Compared to existing sound-generating units with four clearance gaps, the overall volume of the side magnetic structure in this sound-generating unit can be set to be larger, thereby increasing the BL value of the sound-generating unit and improving its sensitivity. Furthermore, the shaping support adopts a double-sided conductive wiring design, which minimizes the width of the cantilever portion of the shaping support, thereby reducing the space occupied by the shaping support within the sound-generating unit. This allows for a larger overall volume of the side magnetic structure, further enhancing the sensitivity of the sound-generating unit. Attached Figure Description

[0014] 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.

[0015] Figure 1 is a schematic diagram of the structure of the sound-generating unit after the yoke is hidden in Embodiment 1 of this utility model;

[0016] Figure 2 is a top view of the shaping support piece in the sound-generating unit of Embodiment 1 of this utility model;

[0017] Figure 3 is a bottom view of the shaping support piece in the sound-generating unit of Embodiment 1 of this utility model.

[0018] Explanation of icon numbers:

[0019] 1. Voice coil;

[0020] 2. Sink stand;

[0021] 3. Central magnetic structure;

[0022] 4. Edge magnetic structure;

[0023] 5. Shaping support piece; 51. Internal mounting part; 511. First lead pad; 512. Second lead pad; 52. Cantilever part; 53. External mounting part; 531. First external pad; 532. Second external pad; 54. First trace; 55. Second trace; 56. First through hole; 57. Second through hole;

[0024] 6. Clearance. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example 1

[0032] Please refer to Figures 1 to 3. Embodiment 1 of this utility model is as follows: a sound generating unit, including a voice coil 1, a frame 2, a magnetic circuit assembly, a diaphragm assembly, and a shaping support 5. The magnetic circuit assembly and the diaphragm assembly are respectively connected to the frame 2. The voice coil 1 is connected to the diaphragm assembly. The magnetic circuit assembly includes a yoke and a central magnetic structure 3 and a side magnetic structure 4 respectively disposed on the yoke. The side magnetic structure 4 is arranged around the central magnetic structure 3. A magnetic gap is formed between the side magnetic structure 4 and the central magnetic structure 3 for the voice coil 1 to move. The side magnetic structure 4 has a clearance gap 6. The inner end of the clearance gap 6 is connected to the magnetic gap.

[0033] The shaping support 5 is located at the clearance gap 6. The shaping support 5 includes an inner mounting part 51, a cantilever part 52, and an outer mounting part 53 connected in sequence. The inner mounting part 51 is fixedly connected to the voice coil 1, and the outer mounting part 53 is fixedly connected to the frame 2. Specifically, the front of the outer mounting part 53 is fixedly connected to the frame 2. The front of the inner mounting part 51 is provided with a first lead pad 511 and a second lead pad 512, and the back of the outer mounting part 53 is provided with a first external solder pad 531. With respect to the second external pad 532, the front side of the shaping support piece 5 is provided with a first trace 54, one end of the first trace 54 is connected to the first lead pad 511, and the other end of the first trace 54 is connected to the first external pad 531 through the first through hole 56. The back side of the shaping support piece 5 is provided with a second trace 55, one end of the second trace 55 is connected to the second lead pad 512 through the second through hole 57, and the other end of the second trace 55 is connected to the second external pad 532.

[0034] To minimize the space occupied by the shaping support piece 5 and to reserve more installation space for the side magnetic structure 4, preferably, the number of cantilever parts 52 in the shaping support piece 5 is one. The single cantilever structure shaping support piece 5 also has the advantage of low production cost.

[0035] The voice coil 1 is generally rectangular. In this embodiment, the clearance 6 is set at one corner of the voice coil 1.

[0036] In one or more embodiments, the side magnet structure 4 includes four side magnet components, each corresponding to one of the four sides of the voice coil 1. Each side magnet component includes a side magnet and a washer connecting the side magnet. The clearance gap 6 is located between two side magnets. In some embodiments, preferably, except at the clearance gap 6, any two adjacent side magnets are arranged close to each other; more preferably, except at the clearance gap 6, any two adjacent side magnets are arranged in contact with each other.

[0037] In other embodiments, the number of the edge magnet assembly is one, in which case the edge magnet is a one-piece structure integrally processed, which facilitates the assembly and production of the sound-generating unit.

[0038] The first through hole 56 is a metallized hole, and the second through hole 57 is a metallized hole.

[0039] 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 inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that: The device includes a voice coil; a frame; a magnetic circuit assembly connected to the frame, the magnetic circuit assembly including a yoke and a side magnetic structure disposed on the yoke, the side magnetic structure having a clearance gap; and a shaping support plate located at the clearance gap, the shaping support plate including an inner mounting part, a cantilever part, and an outer mounting part connected in sequence, the inner mounting part being fixedly connected to the voice coil, the outer mounting part being fixedly connected to the frame, the front of the inner mounting part having a first lead pad and a second lead pad, the back of the outer mounting part having a first external pad and a second external pad, the front of the shaping support plate having a first trace, one end of the first trace being conductive to the first lead pad, the other end of the first trace being conductive to the first external pad through a first through hole, the back of the shaping support plate having a second trace, one end of the second trace being conductive to the second lead pad through a second through hole, the other end of the second trace being conductive to the second external pad.

2. The sound-generating unit according to claim 1, characterized in that: In the shaped support piece, the number of cantilever portions is one.

3. The sound-generating unit according to claim 1, characterized in that: The voice coil is generally rectangular, and the clearance is set at one corner of the voice coil.

4. The sound-generating unit according to claim 1, characterized in that: The edge magnetic structure includes edge magnetic steel, which is a one-piece structure integrally processed.

5. The sound-generating unit according to claim 1, characterized in that: The edge magnetic structure includes four edge magnetic components, each edge magnetic component including an edge magnet, and the clearance gap is located between two of the edge magnets.

6. The sound-generating unit according to claim 1, characterized in that: The magnetic circuit assembly further includes a central magnetic structure disposed on the yoke, the side magnetic structure is disposed around the central magnetic structure, a magnetic gap is formed between the central magnetic structure and the side magnetic structure for the voice coil to move, and the clearance gap is connected to the magnetic gap.

7. The sound-generating unit according to claim 1, characterized in that: The first via is a metallized via.

8. The sound-generating unit according to claim 1, characterized in that: The second via is a metallized via.

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