Conductive speaker diaphragm and conductive component

Abstract

The utility model provides a kind of conductive loudspeaker diaphragm and conductive component, it includes first diaphragm layer and second diaphragm layer, at least two conductive parts are equipped between the first diaphragm layer and second diaphragm layer, connection opening is equipped on the first diaphragm layer and / or the second diaphragm layer, voice coil lead is connected with the conductive part by the connection opening. The utility model is set through two layers of first diaphragm layer and second diaphragm layer, effectively insulates erosion, ensure that diaphragm long-term use conductivity stability, reduce the loudspeaker tone quality attenuation caused by the failure of conductive part. At the same time, connection opening forms the passage of voice coil and circuit electrical connection in diaphragm interior, guarantees the stability of diaphragm acoustic performance. Compared with conventional diaphragm structure, the present application has the advantages of long service life, high stability, wide application range and flexible use design, etc., provides new ideas for the structural optimization of loudspeaker element.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to a conductive loudspeaker diaphragm and conductive components. Background Technology

[0002] In the field of loudspeakers, the diaphragm, as the core sound-generating component, directly affects acoustic performance through its material and structural design. Currently, commonly used materials for loudspeaker diaphragms include natural fibers, metals, rubber, and synthetic resins. Natural fiber diaphragms, with their excellent damping characteristics, perform well in the mid-to-low frequencies, but their insufficient rigidity limits high-frequency extension. Metal diaphragms (such as aluminum and titanium alloys) are rigid and have good high-frequency response, but their low damping makes them prone to split vibrations. Rubber diaphragms are highly flexible and suitable for low-frequency applications, but they suffer from rapid high-frequency decay. Synthetic resin diaphragms (such as PET and PEEK) can balance rigidity and damping through formula optimization, making them one of the mainstream choices.

[0003] In existing loudspeaker operating principles, the voice coil is typically bonded to the diaphragm surface. Vibration generated by electromagnetic induction drives the entire diaphragm to vibrate, thereby pushing air to produce sound. However, this conventional structural design has the following problems: On the one hand, the adhesion between the conductive coating and the diaphragm substrate depends on the surface treatment process. For substrates with low surface energy or strong chemical inertness, such as silicone rubber, PEN, and nitrile rubber, it is difficult to form a stable adhesion. Under the combined effects of long-term high-frequency vibration and voice coil heating in the loudspeaker, the coating is prone to blistering and peeling, leading to circuit breaks or poor contact. At the same time, during the production and assembly process, the exposed conductive coating is easily scratched or damaged by mechanical collisions and friction, reducing the reliability of circuit conduction. Similarly, the coating lacks a protective layer and is susceptible to corrosion from moisture and oxygen during use, leading to a decrease in conductivity and significantly shortening the loudspeaker's lifespan.

[0004] On the other hand, the lead wire of the voice coil needs to extend from the voice coil to the edge of the diaphragm. In conventional designs, the lead wire is often arranged on the diaphragm surface in an overhead manner. Therefore, when the diaphragm vibrates, the lead wire is prone to irregular contact or friction with the diaphragm surface, generating additional noise and seriously affecting the purity of the sound quality. At the same time, the overhead arrangement of the lead wire increases the load imbalance of the diaphragm vibration, which may lead to aggravation of split vibration.

[0005] Therefore, how to improve the adhesion stability, damage resistance, and environmental resistance of the conductive structure and substrate while achieving voice coil lead integration has become a pressing technical problem in the field of loudspeaker diaphragm design. Summary of the Invention

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problems of overhead lead wires and easy damage to conductive coatings in the prior art, and to provide a conductive speaker diaphragm and conductive components.

[0007] To solve the above-mentioned technical problems, the present invention provides a conductive loudspeaker diaphragm, which includes a first diaphragm layer and a second diaphragm layer, with at least two conductive parts between the first diaphragm layer and the second diaphragm layer, and a connection opening on the first diaphragm layer and / or the second diaphragm layer, through which the voice coil lead is connected to the conductive parts.

[0008] In one embodiment of this utility model, the first diaphragm layer and the second diaphragm layer are connected by an insulating adhesive layer.

[0009] In one embodiment of this utility model, there is one connecting opening, and any conductive part is connected to an external voice coil lead through one of the connecting openings; or there are at least two connecting openings, and at least two connecting openings are provided in a one-to-one correspondence with at least two conductive parts.

[0010] In one embodiment of the present invention, the conductive speaker diaphragm further includes a counterweight portion disposed between the first diaphragm layer and the second diaphragm layer, so that the center of gravity of the conductive speaker diaphragm is located on its central axis.

[0011] In one embodiment of this utility model, the connection opening includes a lead wire connection opening and a circuit connection opening. The lead wire connection opening and the circuit connection opening are respectively connected to the two ends of the corresponding conductive part. The voice coil lead is connected to one end of the conductive part through the lead wire connection opening, and the external circuit is connected to the other end of the conductive part through the circuit connection opening.

[0012] In one embodiment of this utility model, both the lead connection opening and the circuit connection opening are disposed on the first diaphragm layer. Alternatively, both the lead connection opening and the circuit connection opening may be located on the second diaphragm layer. Alternatively, the lead connection opening and the circuit connection opening may be respectively disposed on the first diaphragm layer and the second diaphragm layer.

[0013] In one embodiment of the present invention, the conductive speaker diaphragm further includes a support plate, and the first diaphragm layer, the second diaphragm layer and the conductive part are all configured in an annular structure, with the support plate supported on the inner wall of the annular structure.

[0014] In one embodiment of this utility model, the conductive part is a conductive adhesive strip or a conductive metal.

[0015] This utility model also provides a conductive component, which includes the above-mentioned conductive speaker diaphragm.

[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The conductive speaker diaphragm and conductive components described in this invention, while ensuring conductivity and acoustic performance, effectively isolate the conductive parts from external dust, moisture, and mechanical friction through a double-layer structure of the first and second diaphragm layers. This prevents oxidation, wear, or scratches caused by direct exposure of the conductive parts, significantly improving the durability of the conductive path and ensuring stable conductivity of the diaphragm during long-term use, reducing speaker sound quality degradation due to conductive part failure. Simultaneously, the connecting opening inside the diaphragm forms a path for electrical connection between the voice coil and the circuit, avoiding problems such as shaking, pulling, or interference with other components caused by vibration in traditional overhead lead designs, thereby ensuring the stability of the diaphragm's acoustic performance. Compared to existing conventional diaphragm structures, this application offers advantages such as long service life, high stability, wide applicability, and flexible design, providing new ideas for optimizing speaker component structures. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the conductive loudspeaker diaphragm in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of the second diaphragm layer in the conductive loudspeaker diaphragm shown; Figure 3 yes Figure 1 A schematic diagram of the conductive part and insulating layer in the conductive loudspeaker diaphragm shown; Figure 4 yes Figure 1 A schematic diagram of the structure of the first diaphragm layer in the conductive loudspeaker diaphragm shown; Figure 5 yes Figure 1 A schematic diagram of the cross-sectional structure at point AA in the conductive loudspeaker diaphragm shown. Figure 6 This is a schematic diagram of the structure of the conductive loudspeaker diaphragm in another embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the conductive loudspeaker diaphragm in the third embodiment of this utility model; Figure 8 This is a schematic diagram of the structure of the first diaphragm layer in the conductive loudspeaker diaphragm of the fourth embodiment of this utility model; Figure 9 This is a schematic diagram of the structure of the second diaphragm layer in the conductive loudspeaker diaphragm of the fourth embodiment of this utility model.

[0019] Explanation of reference numerals in the accompanying drawings: 100, first diaphragm layer; 110, connection opening; 111, lead wire connection opening; 112, circuit connection opening; 200, second diaphragm layer; 300, conductive part; 400, insulating adhesive layer; 500, counterweight part; 600, support plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0021] Example 1:

[0022] This embodiment provides a conductive loudspeaker diaphragm, which includes a first diaphragm layer 100 and a second diaphragm layer 200. At least two conductive portions 300 are provided between the first diaphragm layer 100 and the second diaphragm layer 200. A connection opening 110 is provided on the first diaphragm layer 100 and / or the second diaphragm layer 200, and the voice coil lead is connected to the conductive portion 300 through the connection opening 110.

[0023] It should be noted that in current conventional diaphragm structures, the conductive coating is exposed to the external environment for extended periods, making it susceptible to corrosion from moisture and oxygen during use. This leads to a decrease in conductivity and a significant reduction in the speaker's lifespan. However, due to the electrical connection requirements of the voice coil leads and external circuits, simply installing a protective membrane results in a high degree of overhead wiring, severely impacting the diaphragm's sound quality. Therefore, the conductive speaker diaphragm described in this embodiment features a first diaphragm layer 100 and a second diaphragm layer 200 outside the conductive part 300. This effectively isolates the conductive part 300 from external dust, moisture, and mechanical friction while ensuring conductivity and acoustic performance. This prevents oxidation, wear, or scratches caused by direct exposure, significantly improving the durability of the conductive path, ensuring stable conductivity during long-term use, and reducing speaker sound quality degradation due to the failure of the conductive part 300. Meanwhile, the connecting opening 110 creates a path for electrical connection between the voice coil and the circuit inside the diaphragm, avoiding problems such as shaking, pulling, or interference with other components caused by vibration in traditional overhead lead wire designs, thereby ensuring the stability of the diaphragm's acoustic performance. Compared with existing conventional diaphragm structures, this application has advantages such as long service life, high stability, wide applicability, and flexible design, providing new ideas for the structural optimization of loudspeaker components.

[0024] See Figures 1 to 5As shown, in this embodiment, the first diaphragm layer 100 and the second diaphragm layer 200 are connected by an insulating adhesive layer 400. This creates a three-layer film structure in the thickness direction of the conductive speaker diaphragm. The substrates of both the first diaphragm layer 100 and the second diaphragm layer 200 are preferably polyetheretherketone (PEEK) films with high elastic modulus and low density. These films provide sufficient rigidity to ensure the diaphragm maintains a stable shape during high-frequency vibration while achieving a lightweight design. Furthermore, their excellent chemical corrosion resistance protects against moisture, oil, and metal debris in the magnetic circuit system, preventing damage to the internal conductive parts 300.

[0025] Specifically, in this embodiment, the second diaphragm layer 200 serves as the basic load-bearing structure of the diaphragm, and is preferably a planar closed structure, see [reference]. Figure 2 As shown, it provides mechanical support and isolates external environmental interference. Located below the conductive part 300, it provides a rigid base for the entire diaphragm, ensuring the morphological stability of the diaphragm during high-frequency vibration and preventing misalignment of the conductive path due to base deformation. Furthermore, in actual processing, the surface of the second diaphragm layer 200 can be treated with corona or plasma to increase the dyne value to above 60 dyne / cm, and the hot-pressing adhesion strength with the insulating adhesive layer 400 of the conductive part 300 is ≥8 N / cm, so that interlayer delamination is less likely to occur during long-term vibration.

[0026] See Figure 3 As shown, in this embodiment, the conductive part 300 serves as the core structure of the conductive speaker diaphragm to achieve electrical connection between the voice coil and the external circuit. The insulating adhesive layer 400 is configured as a structural adhesive block with a thickness of 10-15 μm, possessing good elasticity. It acts as the overall structural skeleton to fix the conductive part 300 and connect the first and second diaphragm layers, ensuring the overall stability of the diaphragm structure. The conductive part 300 conducts current, generating an Ampere force in a magnetic field to drive the diaphragm to vibrate and produce sound. Its conductivity directly affects the driving efficiency and sound quality. Furthermore, the conductive part 300 includes at least two conductive parts 300, which are arranged in an axially symmetrical structure within the plane containing the conductive part 300, and each conductive part 300 radiates outwards from its center to its edge. This symmetrical structural arrangement ensures the symmetry of current distribution and force, thereby improving electromagnetic drive efficiency and vibration balance. The conductive part 300 serves as the current transmission path, and its radial layout allows the current to diffuse evenly from the center to the edge, avoiding diaphragm skewing or twisting caused by uneven local force.

[0027] In the actual preparation process, the order of preparation of the insulating adhesive layer 400 and the conductive part 300 is not limited. The conductive part 300 can be prepared first, and then the insulating adhesive layer 400 can be filled according to the shape of the conductive part 300. Alternatively, the insulating adhesive layer 400 can be prepared first, and then the conductive part 300 can be connected to the insulating adhesive layer 400. Furthermore, the conductive part 300 can be disposed on the surface of the insulating adhesive layer 400 or inside the insulating adhesive layer 400, and holes can be drilled in subsequent processing to expose the conductive part 300.

[0028] Furthermore, in different embodiments, the specific number, shape, and size of the conductive parts 300 can be adaptively adjusted according to actual usage requirements, and this utility model does not impose specific limitations in this regard.

[0029] Furthermore, in this embodiment, the conductive part 300 is a conductive silver paste, which has an extremely low volume resistivity, far superior to carbon-based or polymer conductive materials. This ensures efficient current transmission in the radial path and reduces signal loss. In different embodiments, the conductive part 300 can also be configured as a conductive adhesive or other conductive structure.

[0030] See Figure 4 As shown, the first diaphragm layer 100 blocks external environmental erosion from the front, forming a double barrier with the second diaphragm layer 200 to reduce the oxidation rate of the conductive part 300. Its substrate is also configured as a PEEK film. Furthermore, in this embodiment, the first diaphragm layer 100, the insulating adhesive layer 400, and the second diaphragm layer 200 are joined by thermoforming to form a sandwich structure, reducing the contact area between the conductive part 300 and the outside environment and significantly extending the service life of the conductive part 300. In different embodiments, the thickness of the second diaphragm layer 200 may be slightly greater than that of the first diaphragm layer 100 to disperse vibration stress.

[0031] In this embodiment, at least two connection openings 110 are provided, each corresponding to one of the at least two conductive parts 300. These openings allow the voice coil leads to connect to the conductive parts 300, thus avoiding the problem of overhead leads. The connection openings 110 are precisely positioned to correspond to the ends of the conductive parts 300. The voice coil leads and external circuitry can be directly connected to the conductive parts 300 through the connection openings 110, thereby forming a stable current loop. In other embodiments, only one connection opening 110 may be provided, with any conductive part 300 connected to the external voice coil lead through one connection opening 110. This invention does not impose specific limitations on this.

[0032] Furthermore, the connection opening 110 includes a lead wire connection opening 111 and a circuit connection opening 112. The lead wire connection opening 111 and the circuit connection opening 112 are respectively connected to the two ends of the corresponding conductive part 300. The voice coil lead is connected to one end of the conductive part 300 through the lead wire connection opening 111, and the external circuit is connected to the other end of the conductive part 300 through the circuit connection opening 112. In the plane where the conductive part 300 is located, the circuit connection opening 112 is disposed around the lead wire connection opening 111.

[0033] In this embodiment, both the lead wire connection opening 111 and the circuit connection opening 112 are disposed on the first diaphragm layer 100. The lead wire connection opening 111 serves as the connection interface between the voice coil lead and the conductive part 300, enabling current conduction between the diaphragm and the voice coil. The position of the lead wire connection opening 111 precisely corresponds to the side of the conductive part 300 closest to the center of the diaphragm, allowing the voice coil lead to pass through the opening and be directly bonded to the conductive part 300 using conductive adhesive. In different embodiments, the voice coil lead can also be connected to the conductive part 300 by welding, crimping, or other methods. Furthermore, in this embodiment, the diameter of the lead wire connection opening 111 is slightly larger than the diameter of the lead wire, thereby ensuring smooth insertion of the lead wire while also providing slight constraint on the lead wire through the hole wall, reducing radial wobble during vibration. In other embodiments, the lead connection opening 111 and the circuit connection opening 112 are both disposed on the second diaphragm layer 200, or respectively disposed on the first diaphragm layer 100 and the second diaphragm layer 200. This utility model does not impose specific limitations in this regard.

[0034] The circuit connection opening 112 serves as a connection channel between the conductive part 300 and the external circuit, enabling current output and control. The circuit connection opening 112 is located on the side of the conductive part 300 near the edge of the diaphragm. Pins or wires of the external circuit connect to the conductive part 300 through the opening, realizing the input / output of electrical signals. In this embodiment, the conductive part 300 extends radially from the center of the diaphragm to the edge, with its two ends connected to the lead connection opening 111 and the circuit connection opening 112 respectively. This structure allows the current path to be distributed entirely along the extension direction of the conductive part 300, avoiding current backlash or crossing during transmission, reducing resistance loss, and preventing overhead leads.

[0035] The conductive speaker diaphragm in this embodiment further includes a support plate 600. The first diaphragm layer, the second diaphragm layer, and the conductive part 300 are all configured in a ring structure. The support plate 600 is supported on the inner wall of the ring structure. Specifically, the support plate 600 in this embodiment is preferably an aluminum plate. The aluminum plate is fixed to the inner wall of the first and second diaphragm layers by edge bonding or partial welding, which neither obstructs the vibration area of ​​the ring structure nor hinders the rigid support of the inner ring of the ring structure.

[0036] Example 2:

[0037] See Figure 6 As shown, this embodiment provides another conductive speaker diaphragm, whose main structure and working principle are the same as those of Embodiment 1, and will not be described in detail here. In this embodiment, the conductive part 300 is disposed on one side of the width direction of the conductive part 300, and the two conductive parts 300 are arranged in an axially symmetrical structure to provide another way of laying the conductive cloth.

[0038] Example 3:

[0039] It should be noted that a symmetrical structure ensures that the diaphragm experiences uniform force in all directions during vibration, reducing swaying, twisting, or asymmetrical vibration caused by uneven force, thereby reducing distortion. Simultaneously, the symmetrical design helps to disperse vibration stress, reducing the risk of localized fatigue or damage and extending the diaphragm's lifespan. Based on this, to further improve the quality and lifespan of the conductive speaker diaphragm, this embodiment, based on Embodiment Two, includes a counterweight 500. The counterweight 500 is disposed between the first diaphragm layer 100 and the second diaphragm layer 200, so that the center of gravity of the conductive speaker diaphragm is located on its central axis.

[0040] Furthermore, the two counterweights 500 and the two conductive parts 300 are arranged in an axisymmetric structure within the plane of the conductive parts 300, and their weight is the same as the weight of the conductive parts 300. See [link to details] for more information. Figure 7 As shown. In this embodiment, the counterweight 500 is also made of silver paste, and a corresponding connection opening 110 is provided at the counterweight 500 so that the center of gravity of the conductive speaker diaphragm is located on its central axis, thereby ensuring the high symmetry of the diaphragm mass, avoiding swaying or tilting caused by the shift of the center of gravity during vibration, reducing local stress concentration, and improving acoustic quality.

[0041] Example 4:

[0042] See Figure 8 and Figure 9 As shown, this embodiment provides another conductive speaker diaphragm structure. Unlike Embodiment 1, in this embodiment, the lead wire connection openings 111 are all located on the first diaphragm layer 100, and the circuit connection openings 112 are all located on the second diaphragm layer 200, thereby further enhancing the design flexibility of this conductive speaker diaphragm structure. Furthermore, in other embodiments, a counterweight structure can be correspondingly provided to improve the diaphragm quality and lifespan; this utility model does not impose specific limitations in this regard.

[0043] Example 5: This embodiment provides a conductive component, which includes the conductive loudspeaker diaphragm described in Embodiment 1.

[0044] In summary, the conductive speaker diaphragm and conductive components described in this utility model, while ensuring conductivity and acoustic performance, effectively isolate the conductive part 300 from external dust, moisture, and mechanical friction through the first diaphragm layer 100 and the second diaphragm layer 200. This prevents oxidation, wear, or scratches on the conductive part 300 due to direct exposure, significantly improving the durability of the conductive path and ensuring stable conductivity of the diaphragm during long-term use, reducing speaker sound quality degradation caused by the failure of the conductive part 300. Simultaneously, the connecting opening 110 forms a path for electrical connection between the voice coil and the circuit inside the diaphragm, avoiding problems such as shaking, pulling, or interference with other components caused by vibration in traditional overhead lead designs, thereby ensuring the stability of the diaphragm's acoustic performance. Compared to existing conventional diaphragm structures, this application has advantages such as long service life, high stability, wide applicability, and flexible design, providing new ideas for the structural optimization of speaker components.

[0045] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A conductive loudspeaker diaphragm, characterized in that: It includes a first diaphragm layer and a second diaphragm layer, with at least two conductive parts between the first diaphragm layer and the second diaphragm layer, and a connection opening on the first diaphragm layer and / or the second diaphragm layer, through which the voice coil lead is connected to the conductive part.

2. The conductive loudspeaker diaphragm according to claim 1, characterized in that: The first diaphragm layer and the second diaphragm layer are connected by an insulating adhesive layer.

3. The conductive loudspeaker diaphragm according to claim 1, characterized in that: The connection opening is provided in one location, and any conductive part is connected to an external voice coil lead through one of the connection openings; or the connection opening is provided in at least two locations, and at least two connection openings are provided in a one-to-one correspondence with at least two conductive parts.

4. The conductive loudspeaker diaphragm according to claim 1, characterized in that: The conductive loudspeaker diaphragm also includes a counterweight, which is disposed between the first diaphragm layer and the second diaphragm layer so that the center of gravity of the conductive loudspeaker diaphragm is located on its central axis.

5. The conductive loudspeaker diaphragm according to claim 1, characterized in that: The connection opening includes a lead wire connection opening and a circuit connection opening. The lead wire connection opening and the circuit connection opening are respectively connected to the two ends of the corresponding conductive part. The voice coil lead is connected to one end of the conductive part through the lead wire connection opening, and the external circuit is connected to the other end of the conductive part through the circuit connection opening.

6. The conductive loudspeaker diaphragm according to claim 5, characterized in that: Both the lead wire connection opening and the circuit connection opening are located on the first diaphragm layer. Alternatively, both the lead connection opening and the circuit connection opening may be located on the second diaphragm layer. Alternatively, the lead connection opening and the circuit connection opening may be respectively disposed on the first diaphragm layer and the second diaphragm layer.

7. The conductive loudspeaker diaphragm according to claim 1, characterized in that: The conductive speaker diaphragm also includes a support plate. The first diaphragm layer, the second diaphragm layer, and the conductive part are all configured in an annular structure, and the support plate is supported on the inner wall of the annular structure.

8. The conductive loudspeaker diaphragm according to claim 1, characterized in that: The conductive part is a conductive adhesive strip or a conductive metal.

9. A conductive component, characterized in that: Includes the conductive loudspeaker diaphragm according to any one of claims 1 to 8.

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