sound production unit

Abstract

The utility model discloses a sounding unit, including basin frame, conducting board, vice membrane, conducting layer and voice coil, conducting board is located the basin frame outside, and conducting board has the electrically conductive inner connecting portion and outer connecting portion, and conducting board is fixed on the basin frame with the area of corresponding inner connecting portion, vice membrane includes the inner installation portion, the ring part of folding and the outer installation portion that are connected in proper order from inside to outside, and the inner installation portion is fixedly connected with voice coil, and the outer installation portion is fixedly connected with conducting board, and conducting layer is located vice membrane, and conducting 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 is located the inner installation portion, and the outer conductive portion is located the outer installation portion and is electrically connected with inner connecting portion, and voice coil is fixed and located the inner installation portion and is electrically connected with inner conductive portion.

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] The speaker unit is an essential structural unit in electronic devices such as mobile phones and tablets, and its function is to play sound. To correct the voice coil and improve the acoustic performance of the speaker unit, some speaker units have an additional diaphragm connecting the voice coil and the frame. During the vibration of the voice coil, the diaphragm can pull the voice coil, thereby improving the voice coil polarization and roll phenomena. Although the acoustic performance of this type of speaker unit is improved, its voice coil is often connected to the external power supply through a suspended lead structure. However, the suspended lead structure occupies a lot of internal space of the speaker unit, making it difficult to improve the performance of the speaker unit. Moreover, the lead is prone to breakage when the speaker unit is dropped. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a high-performance sound unit with a stable structure.

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

[0005] Sink stand;

[0006] 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.

[0007] The sub-diaphragm includes an inner mounting part, a folded ring part, and an outer mounting part connected sequentially from the inside to the outside. The inner mounting part is fixedly connected to the voice coil, and the outer mounting part is fixedly connected to the conductive plate.

[0008] A conductive layer is disposed on the sub-film. 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 on the inner mounting part, and the outer conductive part is disposed on the outer mounting part and electrically connected to the inner connecting part.

[0009] The voice coil is fixed on the inner mounting part and electrically connected to the inner conductive part.

[0010] In one embodiment, the voice coil includes a connected body and a lead wire, the inner mounting portion is fixedly connected to the body, and the lead wire is fixed and connected to the inner conductive portion by conductive adhesive.

[0011] In one embodiment, the inner mounting portion, the folded ring portion, and the outer mounting portion are integrally formed continuous films, and the conductive layer conformally adheres to the surface of the continuous film.

[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 folded ring portion is an upward or downward convex arc shape, and the connecting portion of the conductive layer extends continuously along the arc-shaped surface of the folded ring portion.

[0015] In one embodiment, the conductive layer is an elastic conductor, which is composed of a nano-conductive material and an elastic polymer, and the nano-conductive material is at least one of graphene, carbon nanotubes, and nano-metals.

[0016] In one embodiment, the elastic polymer is thermoplastic polyurethane, silicone, or PEEK, and the conductive layer is attached to the surface of the sub-film by spraying or screen printing.

[0017] In one embodiment, the conductive layer is a conductive ink layer formed on the sub-film by a screen printing process.

[0018] In one embodiment, the material used to make the sub-membrane includes at least one of PEEK, TPEE, TPU, and rubber.

[0019] The beneficial effects of this utility model are as follows: The sound unit has a novel structure. By directly integrating the conductive layer into the sub-diaphragm, the sub-diaphragm, while undertaking the traditional mechanical functions of correction and roll suppression, also becomes a "flexible circuit" between the voice coil and the external power supply. This eliminates the need for suspended leads and the internal space they occupy, leaving room for upgrades to the magnetic circuit components or voice coil, thereby directly improving the BL value and sensitivity. When the sound unit is dropped, there is no longer a risk of leads swinging in the air or fatigue fracture at the root, significantly improving reliability. When the surround deforms up and down with the voice coil, the connecting part expands and contracts synchronously, and the internal stress is dispersed by the diaphragm, avoiding the increased contact resistance or instantaneous circuit breakage caused by local bending of traditional leads, ensuring stable electrical conduction. This allows the sound unit to output consistent acoustic performance in a thinner and smaller size, achieving the goal of a structurally stable and high-performance design. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the sound-generating unit in Embodiment 1;

[0022] Figure 2 This is a cross-sectional view of the sound-generating unit in Embodiment 1;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Diaphragm assembly;

[0027] 3. Voice coil; 31. Body; 32. Lead wire;

[0028] 4. Magnetic circuit assembly; 41. Magnetic gap;

[0029] 5. Sub-membrane; 51. Inner mounting part; 52. Folded ring part; 53. Outer mounting part;

[0030] 6. Conductive layer; 61. Inner conductive part; 62. Connecting part; 63. Outer conductive part;

[0031] 7. Conductive plate; 71. Inner connecting part; 72. Outer connecting part. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Furthermore, if the meaning of "and / or" in the entire text is to include three parallel solutions, taking "and A / or B" as an example, it includes solution A, solution B, and a solution that simultaneously 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 those 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.

[0037] 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.

[0038] Example 1

[0039] Please refer to Figures 1 to 3 Embodiment 1 of this utility model is as follows: a sound-generating unit, including a frame 1, a diaphragm assembly 2, a voice coil 3, a magnetic circuit assembly 4, a sub-diaphragm 5, a conductive layer 6, and a conductive plate 7. The conductive plate 7 is located outside the frame 1 and has an electrically conductive inner connecting portion 71 and an outer connecting portion 72. The area of ​​the conductive plate 7 corresponding to the inner connecting portion 71 is fixed to the frame 1. The outer connecting portion 72 is exposed outside the sound-generating unit and is used for electrical connection with an external power source. Optionally, the conductive plate 7 is bonded and fixed to the frame 1. The voice coil 3 is located inside the frame 1. The diaphragm assembly 2 is connected to the voice coil 3 and the frame 1 respectively. The magnetic circuit assembly 4 is fixedly connected to the frame 1. The sub-diaphragm 5 has a magnetic gap 41 for the voice coil 3 to move; the sub-diaphragm 5 includes an inner mounting portion 51, a folded ring portion 52 and an outer mounting portion 53 connected sequentially from the inside to the outside. The inner mounting portion 51 is fixedly connected to the voice coil 3, and the outer mounting portion 53 is fixedly connected to the conductive plate 7; a conductive layer 6 is disposed on the sub-diaphragm 5, and the conductive layer 6 includes an inner conductive portion 61, a connecting portion 62 and an outer conductive portion 63 connected sequentially. The inner conductive portion 61 is disposed on the inner mounting portion 51, the connecting portion 62 is disposed on the folded ring portion 52, and the outer conductive portion 63 is disposed on the outer mounting portion 53 and electrically connected to the inner connecting portion 71. Optionally, the outer conductive portion 63 and the inner connecting portion 71 are bonded and connected by a conductive adhesive; the voice coil 3 is electrically connected to the inner conductive portion 61.

[0040] The electrical conduction path of the sound-generating unit is as follows: external power supply - external connection part 72 - internal connection part 71 - external conduction part 63 - connecting part 62 - internal conduction part 61 - voice coil 3.

[0041] The conductive plate 7 has a suspended end, and the external connection part 72 is disposed on the suspended end. The conductive plate 7 is a rigid circuit board (such as a PCB board) or a flexible circuit board (such as an FPC board).

[0042] The voice coil 3 includes a connected body 31 and a lead wire 32. The inner mounting part 51 is fixedly connected to the body 31. Optionally, the lead wire 32 is fixed and connected to the inner conductive part 61 by conductive adhesive. After the conductive adhesive cures, it forms an elastic buffer. When dropped, the impact is absorbed by the sub-diaphragm 5 and the adhesive layer. Stress concentration no longer occurs at the root of the lead wire 32, completely eliminating the risk of wire breakage. At the same time, the corrective torque of the sub-diaphragm 5 on the voice coil 3 remains unchanged, taking into account both electrical reliability and acoustic stability.

[0043] The sub-membrane 5 is a multilayer composite membrane or a single-layer membrane; the material used to make the sub-membrane 5 includes at least one of PEEK (polyether ether ketone), TPEE (thermoplastic polyester elastomer), TPU (thermoplastic polyurethane) and rubber. PEEK, TPEE, TPU and rubber all have excellent resilience and temperature resistance properties, and the modulus can be adjusted according to the target frequency to ensure that the sub-membrane 5 provides restoring force without adding additional assembly stress, thereby achieving simultaneous optimization of electroacoustic performance and mechanical life.

[0044] The inner mounting portion 51, the folded ring portion 52, and the outer mounting portion 53 are integrally formed continuous diaphragms, and the conductive layer 6 conformally adheres to the surface of the continuous diaphragm. The integral continuous diaphragm is convenient for processing and production, has no segmented seams, and has uniform stress distribution; after conformal adhesion, the conductive layer 6 deforms continuously and synchronously with the diaphragm, and the strain of each segment of the conductive layer 6 is consistent when the folded ring portion 52 is bent back and forth, avoiding local fatigue cracking and ensuring that electrical transmission and mechanical life are improved simultaneously.

[0045] The folded ring portion 52 is an arc shape that bulges upward or downward, and the connecting portion 62 of the conductive layer 6 extends continuously along the arc-shaped surface of the folded ring portion 52.

[0046] The conductive layer 6 is an elastic conductor, which is composed of a nano-conductive material and an elastic polymer. The nano-conductive material is at least one of graphene, carbon nanotubes, and nano-metals, including silver nanowires, gold nanowires, copper nanowires, platinum nanowires, nickel nanowires, silver nanoparticles, gold nanoparticles, copper nanoparticles, platinum nanoparticles, and nickel nanoparticles. The nano-conductive material / elastic polymer composite layer can be as thin as micrometers and has almost zero mass, avoiding the decrease in resonant frequency caused by added mass, thus achieving the effect of a "lightweight and highly elastic" invisible wire.

[0047] Preferably, the elastic polymer is thermoplastic polyurethane, silicone, or PEEK, and the conductive layer 6 is attached to the surface of the sub-film 5 by spraying or screen printing. Using fatigue-resistant elastomers such as TPU, silicone, or PEEK ensures thermal compatibility with the sub-film 5 substrate, resulting in strong interfacial adhesion after spraying / screen printing. The process temperature is below the glass transition point of the sub-film 5, preventing thermal warping of the film. Circuit forming can be completed simultaneously with film formation, simplifying the manufacturing process and reducing production costs.

[0048] In one or more embodiments, the conductive layer 6 is a conductive ink layer formed on the sub-film 5 by a screen printing process. The conductive ink screen printing solution directly uses existing diaphragm printing equipment, and the line width / spacing dimensions can be very precise, with good batch consistency, balancing the advantages of high-precision wiring and large-scale economics.

[0049] 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: 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 sub-diaphragm includes an inner mounting part, a folded ring part, and an outer mounting part connected sequentially from the inside to the outside. The inner mounting part is fixedly connected to the voice coil, and the outer mounting part is fixedly connected to the conductive plate. A conductive layer is disposed on the sub-film. 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 on the inner mounting part, and the outer conductive part is disposed on the outer mounting part and electrically connected to the inner connecting part. The voice coil is fixed on the inner mounting part and electrically connected to the inner conductive part.

2. The sound-generating unit according to claim 1, characterized in that: The voice coil includes a connected body and a lead wire. The inner mounting part is fixedly connected to the body, and the lead wire is fixed and connected to the inner conductive part by conductive adhesive.

3. The sound-generating unit according to claim 1, characterized in that: The inner mounting portion, the folded ring portion, and the outer mounting portion are integrally formed continuous diaphragms, and the conductive layer conformally adheres to the surface of the continuous diaphragm.

4. 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.

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

6. The sound-generating unit according to claim 1, characterized in that: The folded ring portion is an arc shape that convexes upward or downward, and the connecting portion of the conductive layer extends continuously along the arc-shaped surface of the folded ring portion.

7. The sound-generating unit according to claim 1, characterized in that: The conductive layer is an elastic conductor, which is composed of a nano-conductive material and an elastic polymer, and the nano-conductive material is at least one of graphene, carbon nanotubes, and nano-metals.

8. The sound-generating unit according to claim 7, characterized in that: The elastic polymer is thermoplastic polyurethane, silicone, or PEEK, and the conductive layer is attached to the surface of the sub-film by spraying or screen printing.

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

10. The sound-generating unit according to claim 1, characterized in that: The material used to make the sub-membrane includes at least one of PEEK, TPEE, TPU, and rubber.

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