A graphene diaphragm loudspeaker with segmented mass ring tuning structure

Abstract

The utility model relates to loudspeaker technical field especially relates to a kind of graphene diaphragm loudspeaker using subsection mass ring tuning structure.Its technical scheme includes: support shell and diaphragm unit, the upper portion of support shell is provided with diaphragm unit, the lower portion of diaphragm unit is provided with voice coil and is driven by magnetic circuit mechanism, diaphragm unit is composed of diaphragm ball top, diaphragm suspension edge and diaphragm support mass ring, equidistantly notched is set on diaphragm support mass ring, the corresponding position of support shell is provided with protruding portion, protruding portion and the notch are mutually embedded and matched, diaphragm ball top and diaphragm suspension edge are composite structure, it includes porous reinforcing paper layer, transition adhesive layer and graphene flake layer in turn from inside to outside.The utility model is designed by using graphene gradient composite diaphragm structure and subsection mass tuning ring, realizes linear acoustic response with high stiffness and high toughness, and effectively suppresses resonance and fatigue failure, significantly improves the structural reliability of diaphragm.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a graphene diaphragm loudspeaker employing a segmented mass ring tuning structure. Background Technology

[0002] With the development of high-fidelity audio equipment, higher requirements have been placed on the material performance of speaker diaphragms. Traditional diaphragms are mostly made of materials such as polyester film, polyimide, metal-coated film or bio-cellulose paper. It is difficult to balance mass, stiffness and internal loss between these materials: when the diaphragm mass is large, it will lead to response hysteresis and increased transient distortion; while when the diaphragm is too thin or the stiffness is insufficient, it is easy to have high-frequency splitting vibration, which will affect sound resolution and sound field positioning.

[0003] Graphene is considered an ideal acoustic diaphragm material due to its extremely high Young's modulus and ultra-low density. However, pure graphene films are fragile and difficult to process. Single-layer graphene films are difficult to maintain uniformity over a large area, and the bonding interface with the voice coil skeleton is not reliable enough, which can easily lead to acoustic deviations or delamination problems. In addition, the acoustic impedance mismatch between the graphene film and the traditional suspension structure can also cause a decrease in energy transmission efficiency.

[0004] To address this issue, we propose a graphene diaphragm loudspeaker employing a segmented mass ring tuning structure. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a graphene diaphragm loudspeaker with a segmented mass ring tuning structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a graphene diaphragm loudspeaker with a segmented mass ring tuning structure, comprising a support shell and a diaphragm unit, wherein the diaphragm unit is disposed above the support shell and a voice coil is disposed below the diaphragm unit and driven by a magnetic circuit mechanism;

[0007] The diaphragm unit consists of a diaphragm dome, a diaphragm suspension edge, and a diaphragm support mass ring. The diaphragm dome is disposed on the voice coil, the diaphragm suspension edge is disposed on the ring edge of the diaphragm dome, and the diaphragm support mass ring is disposed on the ring edge of the diaphragm suspension edge. The diaphragm support mass ring has notches at equal intervals, and the corresponding positions of the support shell have protrusions that fit into the notches.

[0008] The diaphragm dome and diaphragm suspension edge are a composite structure, which includes, from the inside out, a porous reinforcing paper layer, a transition adhesive layer, and a graphene sheet layer.

[0009] Preferably, the magnetic circuit mechanism consists of a U-shaped iron, a magnet, and a washer, with the washer disposed on the inner circumference of the voice coil, the magnet disposed below the washer, and the U-shaped iron disposed below the magnet.

[0010] Preferably, a tuning hole is provided on the side wall of the support shell, and a tuning paper is attached to the tuning hole.

[0011] Preferably, a PCB board is provided on the side wall of the bracket housing, and a control circuit connected to the voice coil is integrated on the PCB board.

[0012] Preferably, the protrusions are arc-shaped, and the number of protrusions is the same as the number of notches.

[0013] Preferably, the transition adhesive layer is a functionalized polymer film, and the graphene sheet layer, the transition adhesive layer, and the porous reinforcing paper layer are formed by hot pressing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The diaphragm dome and diaphragm suspension are composed of a gradient composite structure consisting of an outer graphene sheet layer, a transition adhesive layer, and an inner porous reinforcing paper layer. The outer layer provides high stiffness and excellent high-frequency response, while the inner porous material effectively disperses the voice coil driving force and improves bending toughness. The transition layer achieves a balance between acoustics and thermal expansion coefficient, thereby significantly improving the linear response and reliability of the diaphragm.

[0016] The diaphragm support mass ring is located on the outer edge of the suspension and has equidistant notches. It fits into the protrusions on the support shell to form a ring mass tuning structure. By setting several notches on the diaphragm support mass ring, the originally continuous closed ring body is transformed into multiple relatively independent segmented mass structures. This can effectively break the single ring resonance mode, reduce the standing wave and resonance peak phenomenon in the mid-to-high frequency band, and make the frequency response of the dome diaphragm smoother. At the same time, the open structure can form a stress release zone when the ring body is subjected to vibration stress, prevent the accumulation and transmission of ring tensile stress, avoid fatigue peeling of the bonding interface and the propagation of graphene edge cracks, and significantly improve the durability and reliability of the overall structure.

[0017] Furthermore, the protrusions and notches work together to restrict the circumferential slippage or rotational offset of the mass ring, and the protrusions fill the gaps in the notches to restore some of the continuous stiffness. Finally, the protrusions serve as assembly guide points to ensure accurate positioning of the mass ring.

[0018] The graphene sheet layer, the transition adhesive layer, and the porous reinforcing paper layer are composited by hot pressing and combined with a functionalized polymer bonding interface to ensure the interlayer bonding strength and long-term stability, avoiding the problem of easy delamination or breakage of traditional graphene films. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a bottom view of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the diaphragm unit structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the layered structure of the diaphragm unit of this utility model.

[0023] Figure label:

[0024] 1. Support housing; 2. Diaphragm unit; 201. Diaphragm dome; 202. Diaphragm suspension edge; 203. Diaphragm support mass ring; 204. Notch; 205. Graphene sheet layer; 206. Transition adhesive layer; 207. Porous reinforcing paper layer; 3. U-shaped iron; 4. Magnet; 5. Tuning paper; 6. PCB board; 7. Voice coil; 8. Washer. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] like Figures 1-4 As shown, the present invention proposes a graphene diaphragm loudspeaker with a segmented mass ring tuning structure, including a support shell 1 and a diaphragm unit 2. The diaphragm unit 2 is disposed at the upper end of the support shell 1, and a voice coil 7 is disposed below the diaphragm unit 2. The voice coil 7 is driven by a magnetic circuit mechanism to generate axial vibration.

[0028] The diaphragm unit 2 consists of a diaphragm dome 201, a diaphragm suspension edge 202, and a diaphragm support mass ring 203. The diaphragm dome 201 is located above the voice coil 7 and is directly bonded to the voice coil 7 to convert the driving force into acoustic vibration. The diaphragm suspension edge 202 is circumferentially connected to the outer edge of the diaphragm dome 201 to provide radial elastic support. The diaphragm support mass ring 203 is located at the outer edge of the diaphragm suspension edge 202 and is used to adjust the circumferential mass and edge stiffness distribution of the diaphragm unit 2.

[0029] Multiple notches 204 are equidistantly arranged around the circumference of the diaphragm support mass ring 203. A protrusion matching the notch 204 is formed at the corresponding position of the support shell 1. After the notch 204 and the protrusion are fitted together, the diaphragm support mass ring 203 is circumferentially positioned during assembly, preventing it from rotating or slipping, and ensuring that the diaphragm unit 2 maintains structural stability under high-frequency vibration. Since the notch 204 divides the originally continuous closed ring into several relatively independent segmented mass structures, the circumferential resonance mode is effectively dispersed, reducing the standing wave and resonance peak phenomenon in the mid-to-high frequency range, and improving the smoothness of the overall frequency response. At the same time, the notch 204 can form a stress release zone when the ring is subjected to vibration stress, preventing the accumulation and transmission of circumferential tensile stress, avoiding fatigue peeling of the bonding interface and the propagation of graphene edge cracks, thereby enhancing the overall durability and reliability.

[0030] After the protrusion is embedded into the notch 204, it fills part of the gap, restores the local continuous stiffness of the ring, and at the same time acts as a guide and positioning structure during the assembly process, so that the diaphragm support mass ring 203 and the bracket shell 1 can be accurately aligned, thereby improving the assembly consistency of the diaphragm unit 2.

[0031] Example 2

[0032] like Figures 1-4 As shown, the present invention proposes a graphene diaphragm loudspeaker with a segmented mass ring tuning structure. Compared with Embodiment 1, this embodiment further includes: the diaphragm dome 201 and the diaphragm suspension edge 202 are gradient composite structures, formed by sequentially stacking an outer graphene sheet layer 205, a transition adhesive layer 206, and an inner porous reinforcing paper layer 207. The graphene sheet layer 205 provides extremely high stiffness and excellent high-frequency response performance, ensuring the linearity and clarity of high-frequency sound wave radiation. The porous reinforcing paper layer 207 is in contact with the voice coil 7 and has good toughness and mass distribution characteristics, which can effectively disperse the driving force of the voice coil 7 and improve the overall bending resistance. The transition adhesive layer 206 is located in the middle layer and is a functionalized polymer film structure, which takes into account the functions of bonding, buffering, and acoustic impedance matching, forming a stable transition interface between different materials and reducing the interface stress concentration caused by thermal expansion differences.

[0033] The graphene sheet layer 205, the transition adhesive layer 206, and the porous reinforcing paper layer 207 are composited by hot pressing. Before hot pressing, the surface of the porous reinforcing paper layer 207 can be plasma activated or chemically functionalized to enhance the interfacial bonding force. The composite gradient film structure simultaneously possesses lightweight, high stiffness, and excellent internal loss characteristics, which can effectively suppress segmentation vibration and distortion, and improve acoustic fidelity.

[0034] The magnetic circuit mechanism consists of U-shaped iron 3, magnet 4 and washer 8 stacked in sequence. The washer 8 is arranged around the inner circumference of the voice coil 7, the magnet 4 is located below the washer 8, and the U-shaped iron 3 is fixed to the bottom of the magnet 4. This magnetic circuit structure forms a stable magnetic gap, providing uniform magnetic flux to the voice coil 7 and ensuring that the diaphragm unit 2 obtains a continuous and balanced driving force.

[0035] Multiple tuning holes are opened on the side wall of the bracket housing 1. Tuning paper 5 is attached to the outside of the tuning holes to adjust the airflow damping. A PCB board 6 is provided on the outer wall of the bracket housing 1. The PCB board 6 integrates a control circuit connected to the voice coil 7 for signal transmission and system matching.

[0036] Through the above structural design, the loudspeaker achieves high-rigidity and fine response of the graphene layer in the high-frequency range, and obtains smooth low-frequency extension through the segmented tuning structure of the diaphragm support mass ring 203 in the mid-low frequency range. The protrusion-notch 204 positioning structure of the bracket shell 1 and the diaphragm support mass ring 203 significantly improves the assembly accuracy and fatigue resistance. The formation method of the gradient composite film ensures a reliable bond between graphene and porous substrate, so that the entire diaphragm unit 2 can still maintain excellent stability and durability under extreme sound pressure conditions.

[0037] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A graphene diaphragm loudspeaker employing a segmented mass ring tuning structure, comprising a support housing (1) and a diaphragm unit (2), characterized in that: A diaphragm unit (2) is provided above the support shell (1), and a voice coil (7) is provided below the diaphragm unit (2) and driven by a magnetic circuit mechanism; The diaphragm unit (2) is composed of a diaphragm dome (201), a diaphragm suspension edge (202), and a diaphragm support mass ring (203). The diaphragm dome (201) is disposed on the voice coil (7). The diaphragm suspension edge (202) is disposed on the ring edge of the diaphragm dome (201). The diaphragm support mass ring (203) is disposed on the ring edge of the diaphragm suspension edge (202). The diaphragm support mass ring (203) has notches (204) at equal intervals. The support shell (1) has a protrusion at the corresponding position. The protrusion and the notch (204) fit together. The diaphragm dome (201) and diaphragm suspension edge (202) are a composite structure, which includes, from the inside out, a porous reinforcing paper layer (207), a transition adhesive layer (206) and a graphene sheet layer (205).

2. A graphene diaphragm loudspeaker employing a segmented mass ring tuning structure according to claim 1, characterized in that: The magnetic circuit mechanism consists of a U-shaped iron (3), a magnet (4) and a washer (8). The washer (8) is located on the inner circumference of the voice coil (7), the magnet (4) is located below the washer (8), and the U-shaped iron (3) is located below the magnet (4).

3. A graphene diaphragm loudspeaker employing a segmented mass ring tuning structure according to claim 1, characterized in that: Tuning holes are provided on the side wall of the support shell (1), and tuning paper (5) is attached to the tuning holes.

4. A graphene diaphragm loudspeaker employing a segmented mass ring tuning structure according to claim 1, characterized in that: A PCB board (6) is provided on the side wall of the bracket housing (1), and a control circuit connected to the voice coil (7) is integrated on the PCB board (6).

5. A graphene diaphragm loudspeaker employing a segmented mass ring tuning structure according to claim 1, characterized in that: The protrusions are arc-shaped, and the number of protrusions is the same as the number of notches (204).

6. A graphene diaphragm loudspeaker employing a segmented mass ring tuning structure according to claim 1, characterized in that: The transition adhesive layer (206) is a functionalized polymer film, and the graphene sheet layer (205), the transition adhesive layer (206) and the porous reinforcing paper layer (207) are formed by hot pressing.

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