sound production unit

Abstract

The utility model discloses a sound unit, including basin frame, conductive plate, diaphragm subassembly, conductive layer and voice coil, conductive plate is located basin frame outside, and conductive plate has the electrically conductive inner connecting portion and outer connecting portion, and the area of conductive plate corresponding to the inner connecting portion is fixed on the basin frame, diaphragm subassembly includes the inner fixed part, the ring part of folding and the outer fixed part that are connected in proper order from inside to outside, and the outer fixed part is connected with the extension portion fixed on the basin frame, conductive layer sets up on diaphragm subassembly, and conductive layer includes the inner conductive portion, the communicating portion and the outer conductive portion that are connected in proper order, and the inner conductive portion sets up the inner fixed part, and the outer conductive portion sets up the extension portion and is electrically connected with the inner connecting portion, and the voice coil is fixed and set on the inner fixed part and is electrically connected with the inner conductive portion. The conductive structure of voice coil in the sound unit can not encroach on the internal space, so that the volume of magnetic circuit assembly can be set larger, and then the performance of the sound unit is improved.

Description

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 units is getting smaller and smaller, but the performance requirements for sound units are getting higher and higher. Therefore, how to improve the performance of sound units under the constraints of product structure and size has become the goal pursued by practitioners.

[0003] In existing sound-generating units, the voice coil is often connected to an external power source through structures such as leads or centering supports. However, these structures occupy internal space within the sound-generating unit, making it difficult to improve its performance. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a high-performance sound generating unit in which the conduction structure of the voice coil does not encroach on the internal space of the sound generating unit.

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

[0006] Sink stand;

[0007] A conductive plate is located on the outside of the basin frame. The conductive plate has an inner connection part and an outer connection part that are electrically conductive. The area of ​​the conductive plate corresponding to the inner connection part is fixed on the basin frame.

[0008] The diaphragm assembly includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The outer fixing part is connected to an extension part that is fixed on the frame.

[0009] A conductive layer is disposed on the diaphragm assembly. The conductive layer includes an inner conductive part, a connecting part, and an outer conductive part connected in sequence. The inner conductive part is disposed in the inner fixing part, and the outer conductive part is disposed in the extension part and electrically connected to the inner connecting part.

[0010] The voice coil is fixed on the inner fixed part and electrically connected to the inner conductive part.

[0011] In one embodiment, the extension includes a first extension arm and a second extension arm connected together. The first extension arm is fixed to the side of the basin frame and connected to an external fixing part. The top surface of the second extension arm is connected to a conductive plate, and an external conductive part is disposed on the top surface of the second extension arm and electrically connected to an internal connecting part.

[0012] In one embodiment, the conductive plate has a suspended end, and the external connection portion is disposed on the suspended end.

[0013] In one embodiment, the conductive plate is a rigid circuit board or a flexible circuit board.

[0014] In one embodiment, the conductive layer is a conductive coating formed on the diaphragm assembly by a spraying process.

[0015] In one embodiment, the conductive coating is a nano-metal conductive coating.

[0016] In one embodiment, the conductive layer is a conductive ink layer formed on the diaphragm assembly by a screen printing process.

[0017] In one embodiment, the diaphragm assembly includes a diaphragm, and the extension and the diaphragm are integrally formed into a single structure.

[0018] In one embodiment, the diaphragm assembly includes a diaphragm, which is a multilayer composite diaphragm or a single-layer diaphragm.

[0019] In one embodiment, the diaphragm assembly includes a diaphragm, the diaphragm being made of at least one of PEEK, TPEE, TPU, and rubber.

[0020] The beneficial effects of this utility model are as follows: This sound-generating unit directly sets a conductive layer on the diaphragm assembly, extending the electrical connection path of the voice coil from the inner conductive part and the connecting part of the conductive layer to the outer conductive part of the extension part, and achieving external conductivity with the inner connecting part of the conductive plate on the outer side of the frame. This eliminates the need for traditional lead wires or centering supports and other additional conductive structures, avoiding their encroachment on the effective space inside the sound-generating unit. This allows the magnetic circuit assembly to make full use of the freed-up space for optimization, thereby improving the BL value and reducing distortion. At the same time, the outer connecting part of the conductive plate can be directly connected to the external power supply, achieving a stable connection between the voice coil and the external power supply, and ultimately achieving high-performance output under the constraints of the product structure. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the overall structure of the sound-generating unit in Embodiment 1 of this utility model;

[0023] Figure 2 This is a top view of the sound-generating unit according to Embodiment 1 of this utility model;

[0024] Figure 3 For along Figure 2 Sectional view of line AA in the middle;

[0025] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0026] Figure 5 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1 of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Voice coil; 11. Body; 12. Lead wire;

[0029] 2. Sink stand;

[0030] 3. Diaphragm assembly; 31. Inner fixing part; 32. Folded ring part; 33. Outer fixing part; 34. Extension part; 341. First extension arm; 342. Second extension arm; 35. Side fixing part; 36. Diaphragm; 37. Dome;

[0031] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 43. Side magnetic structure;

[0032] 5. Conductive layer; 51. Inner conductive part; 52. Connecting part; 53. Outer conductive part;

[0033] 6. Conductive plate; 61. Inner connecting part; 62. Outer connecting part. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Furthermore, if the word "and / or" appears throughout the text, it means that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. 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 claimed by this utility model.

[0039] 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.

[0040] Example 1

[0041] Please refer to Figures 1 to 5The first embodiment of this utility model is as follows: a sound-generating unit, including a voice coil 1, a frame 2, a conductive plate 6, and a diaphragm assembly 3 and a magnetic circuit assembly 4 respectively disposed on the frame 2. The conductive plate 6 is located outside the frame 2 and has an electrically conductive inner connecting part 61 and an outer connecting part 62. The area of ​​the conductive plate 6 corresponding to the inner connecting part 61 is fixed on the frame 2, and the inner connecting part 61 is exposed relative to the frame 2. The magnetic circuit assembly 4 includes a yoke 41 and a central magnetic structure 42 and a side magnetic structure 43 respectively disposed on the yoke 41. The central magnetic structure 42 is located between at least one set of two oppositely disposed side magnetic structures 43. A magnetic gap is formed between the central magnetic structure 42 and the side magnetic structure 43 for the voice coil 1 to move. The central magnetic structure 42 includes a central magnet and a central washer located above the central magnet. The central magnet connects the central washer and the yoke 41. The side magnetic structure 43 includes a side magnet and a central washer located above the side magnet. The upper washer, with the side magnet connecting the washer to the yoke 41, and the washer connected to the frame 2; the diaphragm assembly 3 includes an inner fixing part 31, a folding ring part 32, and an outer fixing part 33 connected sequentially from the inside to the outside. The outer fixing part 33 is fixed to the top surface of the frame 2 and is connected to an extension part 34 fixed to the frame 2. The voice coil 1 is fixed on the inner fixing part 31 to form a vibrating assembly with the diaphragm assembly 3; the diaphragm assembly 3 is provided with a conductive layer. 5. The conductive layer 5 includes an inner conductive part 51, a connecting part 52 and an outer conductive part 53 connected in sequence. The inner conductive part 51 and the connecting part 52 are both located on the side of the diaphragm assembly 3 near the frame 2. The inner conductive part 51 is located in the inner fixing part 31 and is electrically connected to the voice coil 1. The outer conductive part 53 is located in the extension part 34 and is electrically connected to the inner connecting part 61. Optionally, the outer conductive part 53 and the inner connecting part 61 are connected by bonding with conductive adhesive, which facilitates the processing and manufacturing of the sound unit.

[0042] Specifically, the voice coil 1 includes a connected body 11 and a lead wire 12. The body 11 is fixed on the inner fixing part 31, and the lead wire 12 is fixed and electrically connected to the inner conductive part 51. Optionally, the lead wire 12 is fixed and connected to the inner conductive part 51 by conductive adhesive. The conductive adhesive can not only conduct the lead wire 12 and the inner conductive part 51, but also fix and protect the lead wire 12.

[0043] In some embodiments, the extension 34 includes a first extension arm 341 and a second extension arm 342 connected together. The first extension arm 341 is fixed to the side of the basin frame 2 and connected to the outer fixing part 33. The top surface of the second extension arm 342 is connected to the conductive plate 6, and the outer conductive part 53 is disposed on the top surface of the second extension arm 342 and electrically connected to the inner connecting part 61. In this embodiment, the first extension arm 341 is perpendicular to both the outer fixing part 33 and the second extension arm 342.

[0044] The conductive plate 6 has a suspended end, and the external connection part 62 is located at the suspended end. The frame 2 will not interfere with the connection between the external connection part 62 and the external power supply, facilitating the assembly of the sound-generating unit in the electronic device. The conductive plate 6 is a rigid circuit board or a flexible circuit board. The rigid circuit board can be a PCB board, etc., and the flexible circuit board can be an FPC board, etc.

[0045] The diaphragm assembly 3 further includes a side fixing part 35, and the outer fixing part 33 is connected to the first extension arm 341 through the side fixing part 35. The side fixing part 35 is fixed to the side of the frame 2. In one or more embodiments, the side fixing part 35 is arranged in a circle around the frame 2, which can effectively increase the bonding area between the diaphragm assembly 3 and the frame 2, and help ensure the structural stability of the sound-generating unit.

[0046] It is readily understood that the conductive layer 5 has a certain elastic deformation capability, allowing it to deform along with the folded ring portion 32. In some embodiments, the conductive layer 5 is a conductive coating formed on the diaphragm assembly 3 by a spraying process. The conductive coating may be a nano-metal conductive coating, such as a nano-silver conductive coating or a nano-copper conductive coating. In other embodiments, the conductive layer 5 is a conductive ink layer formed on the diaphragm assembly 3 by a screen printing process.

[0047] The extension portion 34 can be one or more, and each extension portion 34 has one or more conductive layers 5. When there is only one extension portion 34, the extension portion 34 has multiple conductive layers 5, one conductive layer 5 conducts to the negative terminal of the voice coil 1, and another conductive layer 5 conducts to the positive terminal of the voice coil 1. When there are multiple extension portions 34, two extension portions 34 each have a conductive layer 5, and the conductive layers 5 on different extension portions 34 respectively conduct to the positive and negative terminals of the voice coil 1.

[0048] The diaphragm assembly 3 includes a diaphragm 36, and preferably the extension 34 and the diaphragm 36 are integrally formed. In some embodiments, the diaphragm assembly 3 also includes a dome 37, which is fixed on the inner fixing part 31, and the body 11 of the voice coil 1 is fixed on the dome 37 or the diaphragm 36.

[0049] The diaphragm assembly 3 includes a diaphragm 36, and the conductive layer 5 is disposed on the diaphragm 36. The diaphragm 36 is a multilayer composite film or a single-layer film. The material used to make the diaphragm 36 includes at least one of PEEK (polyether ether ketone), TPEE (thermoplastic polyester elastomer), TPU (thermoplastic polyurethane elastomer), and rubber.

[0050] 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 sound-generating unit, characterized in that: include Sink stand; A conductive plate is located on the outside of the basin frame. The conductive plate has an inner connection part and an outer connection part that are electrically conductive. The area of ​​the conductive plate corresponding to the inner connection part is fixed on the basin frame. The diaphragm assembly includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The outer fixing part is connected to an extension part that is fixed on the frame. A conductive layer is disposed on the diaphragm assembly. The conductive layer includes an inner conductive part, a connecting part, and an outer conductive part connected in sequence. The inner conductive part is disposed in the inner fixing part, and the outer conductive part is disposed in the extension part and electrically connected to the inner connecting part. The voice coil is fixed on the inner fixed part and electrically connected to the inner conductive part.

2. The sound-generating unit according to claim 1, characterized in that: The extension includes a first extension arm and a second extension arm connected together. The first extension arm is fixed to the side of the basin frame and connected to an external fixing part. The top surface of the second extension arm is connected to a conductive plate. An external conductive part is provided on the top surface of the second extension arm and electrically connected to an internal connecting part.

3. The sound-generating unit according to claim 1, characterized in that: The conductive plate has a suspended end, and the external connection part is disposed on the suspended end.

4. The sound-generating unit according to claim 1, characterized in that: The conductive plate is a rigid circuit board or a flexible circuit board.

5. The sound-generating unit according to claim 1, characterized in that: The conductive layer is a conductive coating formed on the diaphragm assembly by a spraying process.

6. The sound-generating unit according to claim 5, characterized in that: The conductive coating is a nano-metal conductive coating.

7. The sound-generating unit according to claim 1, characterized in that: The conductive layer is a conductive ink layer formed on the diaphragm assembly by a screen printing process.

8. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a diaphragm, and the extension portion and the diaphragm are integrally formed.

9. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a diaphragm, which is a multilayer composite diaphragm or a single-layer diaphragm.

10. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a diaphragm, which is made of at least one of PEEK, TPEE, TPU, and rubber.

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