Loudspeaker diaphragm, loudspeaker and audio device

Abstract

The present application provides a speaker diaphragm, a speaker and an audio device, wherein the speaker diaphragm includes: a dome and a voice coil adhesive tape, wherein the dome includes a first area for improving the high-frequency characteristics of the speaker diaphragm, and a second area connected to the first area; the first area is an arc-shaped area, and the first area is nested outside the second area; the voice coil adhesive tape surrounds the first area and is connected to the first area. By dividing the dome used for sound generation into a first area and a second area, and by setting the first area as an arc-shaped area that can improve the high-frequency characteristics, the rigidity of the dome is enhanced by the arc-shaped area, thereby improving the sound quality of the speaker, and at the same time, no additional structure is required, which reduces the difficulty of producing the speaker diaphragm.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a loudspeaker diaphragm, a loudspeaker and an audio device. Background Art

[0002] A loudspeaker is an electroacoustic transducer that converts electrical energy into sound energy and radiates it to a distant place in the air. A dynamic loudspeaker generally includes a support system, a magnetic circuit system, and a vibration system; the support system is mainly a basin frame, the magnetic circuit system is composed of a magnet, a top plate of soft magnetic material, and a magnetic bowl, and the vibration system includes a diaphragm and a voice coil. The vibration system is the core system of the entire loudspeaker, and the diaphragm is the most important component of the vibration system. The diaphragm is divided into a dome part and a folded ring part. The magnetic field generated by the magnetic circuit system exerts force on the energized voice coil to drive the voice coil to vibrate, the voice coil drives the diaphragm to vibrate, and the diaphragm drives the air to vibrate to produce sound. The vibration state of the diaphragm directly affects the acoustic performance of the loudspeaker, such as the size of the transmitted sound, the bandwidth range, and the distortion performance.

[0003] Nowadays, people are pursuing higher and higher sound quality. To enjoy high-quality music, audio devices need to be able to transmit music signals as losslessly as possible. Music signals have a wide frequency range, especially the overtones of instruments such as violins and guitars, whose overtone frequencies reach more than ten kHz or even dozens of kHz. In order to transmit these signals losslessly, the speaker frequency range needs to be large enough. Therefore, high bandwidth has become one of the important indicators of speakers and also a selling point for some headphones.

[0004] The main method to improve the frequency range of a speaker is to increase the rigidity of the diaphragm material, that is, to increase the Young's modulus of the material, so as to improve the frequency range of the speaker, such as coating the diaphragm surface with metal (magnesium, aluminum, etc.) or carbon-based materials (diamond, graphene, etc.). This method of achieving high bandwidth has high material requirements and high costs (generally, coating materials are more expensive than diaphragm substrates), and requires a spraying process, which is difficult to implement and is not suitable for large-scale production. Summary of the invention

[0005] The present application provides a speaker diaphragm, a speaker and an audio device, which are used to improve the sound quality of the speaker and reduce the difficulty of production.

[0006] In a first aspect, a loudspeaker diaphragm is provided, which includes a dome and a voice coil bonding tape. Among them, the dome includes a first region for improving the high-frequency characteristics of the loudspeaker diaphragm and a second region connected to the first region; the first region is nested outside the second region; the first region is an arc region, and the radius of the arc region is smaller than the radius of the dome; the voice coil bonding tape surrounds the first region and is connected to the first region. By dividing the dome for sound production into a first region and a second region, and setting the first region as an arc region that can improve high-frequency characteristics, the rigidity of the dome can be enhanced through the arc region, thereby improving the sound quality of the loudspeaker. At the same time, without additional structures, the production difficulty of the loudspeaker diaphragm can be better reduced.

[0007] In an optional embodiment, the cross-section of the side wall of the first region can be circular arc-shaped. Further, the rigidity of the dome can be enhanced, and the sound quality of the loudspeaker can be improved.

[0008] In an optional embodiment, the loudspeaker diaphragm can meet the following conditions: H2 is 40% - 60% of the height H1; W1 < W2 < H2; where H1 is the total height of the dome; H2 is the height of the first region; W1 is the width of the voice coil bonding tape, and W2 is the width of the first region. This can ensure that the first region has a certain height and width to improve the stiffness of the dome.

[0009] In an optional embodiment, the loudspeaker diaphragm can also meet: θ2 is 5 - 6 times of θ1; where θ1 is the horizontal direction angle between the highest point of the second region and the first surface, and θ2 is the angle between the tangent line at the starting point of the first region and the first surface; the first surface is the surface where the voice coil bonding tape is bonded to the voice coil. This can ensure that the first region has a certain height and width to improve the stiffness of the dome.

[0010] In an optional embodiment, the angle range between the tangent line at the end point of the first region along the height direction of the dome and the tangent line at the starting point of the first region can be 120° - 140°; the angle range between the tangent line at the starting point of the first region and the first surface can be 65° - 85°. This can ensure that the first region has a certain height and width to improve the stiffness of the dome.

[0011] In an optional embodiment, the first region can also be provided with a strengthening structure for increasing the strength of the loudspeaker diaphragm. Through the strengthening structure, the rigidity of the dome is further increased, and the sound quality of the loudspeaker is improved.

[0012] In an optional embodiment, the reinforcement structure may be a plurality of reinforcement ribs, and the plurality of reinforcement ribs are arranged around the inner side wall of the first area. The rigidity of the dome is increased by the reinforcement ribs, so that the sound quality of the speaker can be improved.

[0013] In an optional embodiment, a plurality of reinforcing ribs are evenly arranged on the inner side wall of the first region to improve the rigidity of the dome.

[0014] In an optional embodiment, the bottom surface of the reinforcing rib can be a plane, and the bottom surface is the surface of the reinforcing rib facing the magnet of the speaker to improve the sound quality. In an optional embodiment, the bottom surface of the reinforcing rib can also be a rectangle or a triangle.

[0015] In an optional embodiment, the second region may be arc-shaped or cone-shaped.

[0016] In an optional embodiment, the loudspeaker diaphragm may further include a folding ring connected to the voice coil adhesive tape, the folding ring being arranged around the voice coil adhesive tape. In an optional embodiment, the folding ring may be provided with a pattern structure to improve the structural strength of the folding ring.

[0017] In an optional embodiment, the loudspeaker diaphragm may further include a basin frame adhesive tape connected to the fold ring, and the basin frame adhesive tape is arranged around the fold ring.

[0018] In an optional embodiment, the fold ring, the voice coil adhesive tape and the dome can be an integral structure; or the fold ring and the voice coil adhesive tape are adhesively connected. In this way, the fold ring and the voice coil adhesive tape can be arranged in different ways.

[0019] In a second aspect, a speaker is provided, comprising the speaker diaphragm described in any one of the above items, and a voice coil connected to the voice coil adhesive tape. By dividing the dome for sound generation into a first area and a second area, and by setting the first area as an arc-shaped area that can improve high-frequency characteristics, the rigidity of the dome can be enhanced by the arc-shaped area, thereby improving the sound quality of the speaker, and at the same time, no additional structure is required, thereby reducing the difficulty of producing the speaker diaphragm.

[0020] In a third aspect, an audio device is provided, comprising a housing and the speaker mentioned in the second aspect arranged in the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an audio signal processing flow chart;

[0022] Figure 2 An exploded schematic diagram of a diaphragm provided in an embodiment of the present application being applied to a loudspeaker;

[0023] Figure 3 for Figure 2 a cutaway view of the loudspeaker shown;

[0024] Figure 4 A three-dimensional schematic diagram of a diaphragm provided in an embodiment of the present application;

[0025] Figure 5 for Figure 4 Sectional view at AA in the middle;

[0026] Figure 6 A schematic diagram of the curvature shape of the dome provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of the structure of another diaphragm provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of the connection between the fold ring and the dome provided in an embodiment of the present application;

[0029] Fig. 9 A schematic diagram of the connection between the fold ring and the dome provided in an embodiment of the present application;

[0030] Fig.10 A schematic diagram of the structure of another diaphragm provided in an embodiment of the present application;

[0031] Fig.11 The frequency response curves of the loudspeaker using the diaphragm of the present application and the loudspeaker using a conventional diaphragm;

[0032] Fig.12 for Fig.11 An enlarged schematic diagram of part of the curve in . DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0034] To facilitate understanding of the speaker diaphragm provided in the embodiment of the present application, its application scenario is first explained. The speaker diaphragm in the embodiment of the present application can be applied to the speaker of an audio product (headphones, speakers, etc.) for playing music signals, supporting high-fidelity link transmission of music signals, and providing a high-quality music experience. Figure 1The audio signal processing flow shown in the above process includes analog signals, input devices, sound cards, disk files, sound cards, and output devices, realizing the entire audio link: recording-->decoding-->power amplifier-->playback. The speaker diaphragm provided in the embodiment of the present application can be specifically used in the output device (speaker), by improving the sensitivity of the speaker at ultra-high frequencies, supporting the speaker to play lossless music signals, thereby realizing a high-resolution (recording-->decoding-->power amplifier-->playback) full audio link, transmitting high-quality music, and providing consumers with a top-level music experience. The structure is described in detail below in conjunction with the accompanying drawings. For the convenience of description, the speaker diaphragm will be referred to as the diaphragm hereinafter.

[0035] like Figure 2 The figure shows an exploded schematic diagram of a diaphragm 101 provided in an embodiment of the present application applied to a speaker. The speaker comprises a diaphragm 101, a voice coil 102, a pole piece 103, a magnet 104, a magnetic bowl 105, a basin frame 106, a PCB board 107, a first mesh 108 and a second mesh 109. The voice coil 102, the pole piece 103, the magnet 104 and the magnetic bowl 105 constitute a magnetic circuit system for driving the diaphragm 101 to vibrate, and the first mesh 108 and the second mesh 109 can be used in the speaker as optional components.

[0036] Combination Figure 3 Explain how the various parts of the speaker are connected. Figure 3 It is shown in Figure 2 The cross-sectional view of the loudspeaker shown in FIG. 1 is a diagram for explaining the structure of the diaphragm 101 in order to facilitate understanding of the connection between the diaphragm 101 and other parts of the loudspeaker. The diaphragm 101 includes several structures such as a basin frame adhesive tape, a folding ring, a voice coil adhesive tape and a dome. Among them, the dome is located in the central area of ​​the diaphragm 101, and the voice coil adhesive tape, the folding ring and the basin frame adhesive tape are nested in sequence in a direction away from the central area to form the main structure of the diaphragm 101. When the diaphragm 101 is used in a loudspeaker, the basin frame adhesive tape of the diaphragm 101 is connected and fixed to the basin frame 106, the voice coil 102 is connected and fixed to the voice coil adhesive tape, the pole piece 103 and the magnet 104 are stacked, the voice coil 102 is nested outside the assembled magnet 104 and the pole piece 103, and the assembled magnet 104 and the pole piece 103 are fixedly assembled in the magnetic bowl 105. The magnetic bowl 105 is connected and fixed to the basin frame 106, the PCB board 107 is fixed on the basin frame 106, and the PCB board 107 is connected to the voice coil 102 through the lead of the voice coil 102 to supply power to the voice coil 102. When in use, the PCB board 107 controls the power supply to the voice coil 102, so that the magnetic circuit system composed of the voice coil 102, the pole piece 103, the magnet 104, and the magnetic bowl 105 drives the diaphragm 101 to vibrate.

[0037] In an optional solution, the first mesh cloth 108 is fixed on the basin frame 106, and the second mesh cloth 109 is fixed on the magnetic bowl 105, wherein the first mesh cloth 108 and the second mesh cloth 109 can be arranged in the speaker as optional structures.

[0038] In an alternative embodiment, the magnetic circuit system is not limited to Figure 3 The structure shown in , the magnetic circuit system provided in the embodiment of the present application may also include only the magnetic bowl 105, the magnet 104 and the voice coil 102, and the pole piece 103 is used in the speaker as an optional accessory.

[0039] Continue to refer Figure 3 The diaphragm 101 provided in the embodiment of the present application is connected to the basin frame 106 through the basin frame adhesive tape to support the entire diaphragm 101, and the voice coil adhesive tape is used to connect with the voice coil 102 so that the voice coil 102 drives the diaphragm 101 to vibrate, and the main sound-emitting area of ​​the diaphragm 101 is the dome. The diaphragm 101 provided in the embodiment of the present application mainly involves the dome of the diaphragm 101, and other structures of the diaphragm 101 (voice coil adhesive tape, folding ring, basin frame adhesive tape) are applied to the diaphragm 101 of the present application as optional structures. The specific structure of the diaphragm 101 provided in the embodiment of the present application is described in detail below in conjunction with the accompanying drawings.

[0040] First reference Figure 4 , Figure 4The 3D schematic diagram of the diaphragm 101 provided by the embodiment of the present application is illustrated in the figure. The dome 1011 is located in the central area of ​​the entire diaphragm 101, and its edge is a circle. The voice coil adhesive tape 1012, the folding ring 1013, and the basin frame adhesive tape 1014 are all annular structures, and are nested in sequence along the direction pointing outward from the center of the diaphragm 101: the voice coil adhesive tape 1012 is nested outside the dome 1011 and connected to the dome 1011, the folding ring 1013 is nested outside the voice coil adhesive tape 1012 and connected to the voice coil adhesive tape 1012, and the basin frame adhesive tape 1014 is nested outside the folding ring 1013 and connected to the folding ring 1013. The dome 1011 includes two areas: a first area 1011b and a second area 1011a connected to the first area 1011b, wherein the first area 1011b is an area for improving the high-frequency characteristics of the speaker diaphragm 101. In a specific configuration, the second region 1011a is a circular structure and is located in the center of the sphere; the first region 1011b is an annular structure and is nested outside the second region 1011a, and the voice coil adhesive tape 1012 surrounds the first region 1011b and is connected to the first region 1011b. It should be understood that the first region 1011b and the second region 1011a are regions divided on the dome 1011 according to their functions, and the first region 1011b and the second region 1011a may be a structure prepared in one piece, and the connection between the first region 1011b and the second region 1011a may refer to the connection relationship formed between the two regions when they are prepared in one piece.

[0041] In an optional solution, the diaphragm 101 provided in the embodiment of the present application can be made of different materials. For example, the basin frame adhesive tape 1014, the folding ring 1013, the voice coil adhesive tape 1012 and the ball top 1011 of the diaphragm 101 can be made of polymer materials, such as PEEK, PET, PEN, PI, LCP, etc., or a multilayer composite material composed of polymer materials and damping glue, TPU, etc. can also be used. As an optional solution, when preparing the above structure of the diaphragm 101, metal materials can be added on the basis of the above materials, and the metal materials can be attached to the above materials as a coating; or carbon-based materials can be added on the basis of the above materials, such as DLC (diamond-like carbon), carbon nanotubes, graphene, microcrystalline graphite, etc. attached to the above materials. It should be understood that no matter what material is used to prepare the diaphragm 101, it is necessary to meet the requirements that the Young's modulus of the material of the diaphragm 101 is higher than 50Mpa and the density is lower than 3.0g / cm 3 .

[0042] For reference Figure 5 shown Figure 4 The cross-sectional view at AA in the middle, the section AA passes through the center point of the diaphragm 101, Figure 5 The part numbers in Figure 4Same numbers in the figure. For the convenience of description, a coordinate system with the A-A section as the reference is established. XOY represents the A-A section, where X represents the width direction and Y represents the height direction. In the following text, the shape of the component, the width and height of the component refer to the shape of the component, the height and width of the component in the section. Additionally, the inner wall and the side wall of the first region 1011b are described. Here, the inner wall refers to one surface of the side wall of the first region 1011b, and the side wall refers to the side wall structure of the first region 1011b.

[0043] Refer to together Figure 6 , Figure 6 shows the arc shape of the dome 1011. The above-mentioned first region 1011b and the second region 1011a are both arc-shaped regions. Among them, the radius of the arc-shaped region of the first region is smaller than the radius of the dome. Exemplarily, the cross-section of the side wall of the first region 1011b is circular arc-shaped, such as Figure 6 the arc segment with a radius of R1 shown in is the first region 1011b. The starting point of the first region 1011b is point A (the connection point of the first region 1011b and the voice coil adhesive tape 1012), and the ending point is point B. The cross-section of the side wall of the second region 1011a is circular arc-shaped, such as Figure 6 the arc segment with a radius of R2 shown in is the second region 1011a. The first region 1011b and the second region 1011a are tangent at point B. Among them, R2 is the same as the radius of the dome 1011, and R1 < R2. The above limitations are to improve the strength of the dome 1011 to improve the high-frequency characteristics of the dome 1011 for the diaphragm 101. Specifically, the height, arc, and angle of the arc region of the first region 1011b can be limited: The height, arc, and angle of the arc region of the first region 1011b have a dimensional relationship with the height of the dome 1011. This dimensional relationship can be: H2 is 40% - 60% of the height of H1; W1 < W2 < H2; W2 < H2 is the dimensional relationship derived from the stiffness calculation formula S = πEt(sinθ2) 2 / cosθ2, where S is the stiffness of the diaphragm material, E is the Young's modulus of the diaphragm material, t is the thickness of the diaphragm material, and θ2 is the angle between the tangent line at the starting point (point A) of the first region 1011b and the first surface. The first surface is the surface where the voice coil adhesive tape 1012 is bonded to the voice coil. H1 is the total height of the dome 1011, that is, the vertical distance between point A and the highest point of the dome 1011; H2 is the height of the first region 1011b, that is, the vertical distance between point A and point B; W1 is the width of the voice coil adhesive tape 1012, and W2 is the width of the first region 1011b.

[0044] As a specific example, H2 can have different sizes such as 40%, 45%, 50%, 55%, 60% of the height of H1. By adopting H2 to be 40% - 60% of the height of H1; W1 < W2 < H2, it can ensure that the shape of the first region 1011b has greater stiffness. W1 < W2 can ensure that the rigid region (the first region 1011b) has a larger area, and it can avoid the bending vibration of the diaphragm itself under the action of the voice coil vibration thrust. Under high-frequency vibration conditions, that is, when the voice coil amplitude is small and the vibration frequency is large, the first region 1011b is directly connected to the voice coil, and it can maintain a large dynamic stiffness of the first region 1011b. That is, when the voice coil thrust changes extremely fast, the structural deformation of the diaphragm 1011 is small, thereby ensuring high-frequency ductility and ensuring that the diaphragm 101 can have certain high-frequency characteristics during operation.

[0045] Continue to refer to Figure 6 , the diaphragm 101 can also satisfy: θ2 is 5 - 6 times that of θ1; where θ1 is the horizontal angle between the highest point of the second region 1011a and the first surface; θ2 is the angle between the tangent line at the starting point (point A) of the first region 1011b and the first surface; the first surface is the surface where the voice coil adhesive tape 1012 is adhered to the voice coil. This ensures that the first region 1011b has a certain height and width to improve the stiffness of the dome 1011. For example, θ2 can be 5 times, 5.5 times, 6 times, etc. of θ1. Exemplarily, the angle range of the angle θ2 between the tangent line at the starting point (point A) of the first region 1011b and the first surface can be 65° - 85°, such as θ2 being 65°, 70°, 75°, 80°, 85°, etc. different angles, and the corresponding θ1 can be 13°, 14°, 15°, 20°, etc. different angles.

[0046] To more clearly illustrate the length and width of the first region 1011b, θ3 is introduced. θ3 is the angle between the tangent line at the end point (point B) of the first region 1011b along the height direction of the dome 1011 and the tangent line at the starting point (point A) of the first region 1011b. The angle range of θ3 can be 120° - 140°. The length and width of the first region 1011b can be limited by the angles of θ3 and θ2. Exemplarily, θ3 can be 120°, 125°, 130°, 135°, 140°, etc. different angles. The relationship between θ2 and θ3 and the corresponding relationship between θ2 and θ1 can clearly limit the length and width of the first region 1011b. Thus, it can ensure that there is a large enough region in the dome 1011 to improve the strength of the diaphragm 101, and further improve the high-frequency characteristics of the diaphragm 101.

[0047] Such as Figure 7 shown in another diaphragm 101 provided by the embodiment of the present application Figure 7 Some of the numbers in Figure 4 can refer to the numbers in Figure 7 The first area shown in FIG. 1 is provided with a reinforcement structure for increasing the strength of the speaker diaphragm 101. The reinforcement structure can increase the rigidity of the dome 1011 and improve the sound quality of the speaker. Figure 7 The middle reinforcement structure is a plurality of reinforcing ribs 1011c, and the number of the reinforcing ribs 1011c can be set to a few or more than ten. When set, the plurality of reinforcing ribs 1011c can be arranged around the inner side wall of the first area. For example, the plurality of reinforcing ribs 1011c can be evenly arranged on the inner side wall of the first area, or the plurality of reinforcing ribs 1011c can be arranged in a non-uniform manner on the inner side wall of the first area.

[0048] In a specific embodiment, the height of the reinforcing rib 1011c can be 40% to 60% of the height of the first region 1011b, that is, H3 is 40% to 60% of the height of H2, where H3 is the height of the reinforcing rib 1011c. The width of the reinforcing rib 1011c can be 1 to 2 times the width of the side wall of the first region 1011b. This ensures that the reinforcing rib 1011c has sufficient structural strength to improve the strength of the dome 1011. In the specific preparation, the reinforcing rib 1011c can be prepared in an integrated manner with the dome 1011. Alternatively, the reinforcing rib 1011c can be fixedly connected to the first region 1011b by bonding or welding.

[0049] In an optional solution, the bottom surface of each reinforcing rib 1011c is a plane, and the bottom surface is the surface of the reinforcing rib 1011c facing the magnet 104 of the speaker, so as to avoid the added reinforcing rib 1011c affecting the sound quality of the speaker.

[0050] In an optional embodiment, the reinforcing rib 1011c can adopt reinforcing ribs 1011c of different shapes. For example, the bottom surface of the reinforcing rib 1011c can be a "□" rectangle, a "△" triangle or other shapes, which are not specifically limited in the present application.

[0051] In an optional solution, in order to improve the structural strength of the diaphragm 101, the folding ring 1013 in the present application may be further provided with a pattern structure 10131. For example, the folding ring 1013 may adopt a "V"-shaped pattern structure, and the length direction of the pattern structure 10131 is along the basin frame adhesive tape 1014 and points to the voice coil adhesive tape 1012. The "V"-shaped pattern structure can improve the structural strength of the folding ring 1013, thereby improving the structural strength of the diaphragm. It should be understood that the above-mentioned "V"-shaped pattern structure is only a specific example, and the pattern structure 10131 provided in the example of the present application may also adopt pattern structures of other shapes, such as a wavy pattern structure.

[0052] For reference Figure 8 and Fig. 9, Figure 8 and Fig. 9 Two different connection methods between the fold 1013 of the diaphragm 101 and the dome 1011 are respectively illustrated. Figure 8 The folding ring 1013, the voice coil adhesive tape 1012 and the dome 1011 are an integrated structure. During preparation, the folding ring 1013 and the dome 1011 can be formed into an integrated structure by hot pressing with a mold. Alternatively, the following method can be used: Fig. 9 The folding ring 1013 is bonded to the voice coil adhesive tape 1012. In the specific preparation, the folding ring 1013 and the dome 1011 are formed separately by hot pressing of a mold, and the folding ring 1013 and the dome 1011 after forming have an overlapping structure on the voice coil adhesive tape 1012, and the overlapping parts are bonded and connected by gluing to achieve the connection between the two.

[0053] like Fig.10 The structure of another diaphragm 101 provided in the embodiment of the present application is shown. Fig.10 The part numbers in Figure 4 The section number in . Figure 4 The second region 1011a shown adopts a conical structure, which can also achieve the same effect.

[0054] It can be seen from the specific diaphragm examples in the above-mentioned drawings that compared with the existing design, the diaphragm of the present application has an improved design on the dome, and the dome of the diaphragm is composed of two sections. An "arched" curvature structure design is performed on the dome area on the side of the diaphragm voice coil adhesive tape (first area) to improve the structural strength of the diaphragm, and by defining the height, curvature, and angle dimensional relationship of the first area in detail, the diaphragm deformation caused by the dome vibration under high-frequency conditions is improved, the high-frequency split vibration can be suppressed, the high-frequency frequency response curve can be smoothed, and the high-frequency bandwidth characteristics can be achieved, and the structural strength of the dome is further improved by arranging reinforcing ribs on the first area.

[0055] The diaphragm provided in the embodiment of the present application realizes the high-frequency bandwidth characteristics of the speaker unit by improving the dome side structure, that is, the high-frequency bandwidth characteristics are realized by improving a section of curvature, and the high-frequency characteristics can also be realized by setting a multi-section curvature dome. To facilitate understanding of the effect of the diaphragm provided in the embodiment of the present application. In addition, the present application only makes innovative designs to the diaphragm structure, does not involve the addition of complex processes, does not use special materials, and does not require the expansion of the size and shape of the speaker, occupies a small space, and reduces the difficulty of producing the speaker diaphragm. To facilitate understanding of the diaphragm provided in the embodiment of the present application, the frequency response curve of the speaker designed using the diaphragm of the present application scheme is compared with that of the speaker designed using a conventional diaphragm.

[0056] like Fig.11 and Fig.12 As shown, Fig.11The frequency response curves of the loudspeaker using the diaphragm of the present application and the loudspeaker using the conventional diaphragm are shown in FIG. 1 , wherein the horizontal axis is the frequency (Frequency), in units of Hz (joint venture); the vertical axis is the sound pressure level (SPL, Soud, pressure level), in units of db (decibel). The solid line is the loudspeaker using the conventional diaphragm, and the dotted line is the loudspeaker using the diaphragm 101 of the embodiment of the present application. Fig.12 for Fig.11 First refer to Fig.11 , the solid line drops sharply at 40kHz, and the SPL at 50kHz is only 62dB, while the dotted line is still 78dB at 50kHz, and the bandwidth expansion effect is obvious. Fig.12 As shown, the solid line has an obvious peak at 20kHz~30kHz, while the dotted line has no such peak. The dotted line smoothes the frequency response curve while expanding the bandwidth, which can improve the high-frequency sound quality experience.

[0057] The present application also provides a speaker, which can be used in audio playback module scenarios of devices such as headphones, speakers, televisions, and mobile phones. The speaker includes any of the above speaker diaphragms and a voice coil connected to a voice coil adhesive tape. The structure of the speaker can be specifically referred to in Figure 2 and Figure 3 The specific description will not be repeated here. The diaphragm provided in the embodiment of the present application realizes the high-frequency bandwidth characteristics of the speaker unit by improving the dome side structure, that is, the high-frequency bandwidth characteristics are realized by improving a section of curvature, and the high-frequency characteristics can also be realized by setting a multi-section curvature dome. For the convenience of understanding the effect of the diaphragm provided in the embodiment of the present application. In addition, the present application only makes an innovative design to the diaphragm structure, does not involve the addition of complex processes, does not use special materials, and does not require the expansion of the size and shape of the speaker, and occupies a small space.

[0058] The embodiment of the present application also provides an audio device, which can be headphones, speakers, televisions, mobile phones and other devices. The audio device includes a shell and the above-mentioned speaker arranged in the shell. The diaphragm provided in the embodiment of the present application realizes the high-frequency bandwidth characteristics of the speaker unit by improving the dome side structure, that is, the high-frequency bandwidth characteristics are achieved by improving a section of curvature, and the high-frequency characteristics can also be achieved by setting a multi-section curvature dome. For the convenience of understanding the effect of the diaphragm provided in the embodiment of the present application. In addition, the present application only innovatively designs the diaphragm structure, does not involve the addition of complex processes, does not use special materials, and does not require the expansion of the size and shape of the speaker, and occupies a small space.

[0059] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A loudspeaker diaphragm, characterized in that: Comprising: A dome and a voice coil bonding tape, wherein, The dome includes a first region for improving the high-frequency characteristics of the speaker diaphragm, and a second region connected to the first region; the first region is nested outside the second region, and the cross-section of the side wall of the first region is arc-shaped; The first region is an arc-shaped region, and the radius of the arc-shaped region is smaller than the radius of the dome; The voice coil bonding tape surrounds the first region and is connected to the first region; The speaker diaphragm satisfies the following conditions: H2 is 40% - 60% of the height of H1, and, W1 < W2 < H2, where, H1 is the total height of the dome; H2 is the height of the first region; W1 is the width of the voice coil bonding tape, and W2 is the width of the first region; θ2 is 5 - 6 times of θ1, where, θ1 is the horizontal direction angle between the highest point of the second region and the first surface, and θ2 is the angle between the tangent line at the starting point of the first region and the first surface, and the first surface is the surface where the voice coil bonding tape is bonded to the voice coil; The angle range between the tangent line at the ending point of the first region in the height direction of the dome and the tangent line at the starting point of the first region is 120° - 140°, and the angle range between the tangent line at the starting point of the first region and the first surface is 65° - 85°.

2. The loudspeaker diaphragm according to claim 1, characterized in that: The first region is provided with a strengthening structure for increasing the strength of the speaker diaphragm.

3. The loudspeaker diaphragm according to claim 2, characterized in that: The strengthening structure is a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged around the inner side wall of the first region.

4. The loudspeaker diaphragm according to claim 3, characterized in that: The bottom surface of the reinforcing rib is a plane, and the bottom surface is the surface of the reinforcing rib facing the magnet of the speaker.

5. The loudspeaker diaphragm according to any one of claims 1 to 4, characterized in that: The second region is arc-shaped or conical.

6. The loudspeaker diaphragm according to any one of claims 1 to 4, characterized in that: The speaker diaphragm further includes a surround connected to the voice coil bonding tape, and the surround is arranged around the voice coil bonding tape.

7. The loudspeaker diaphragm according to claim 6, characterized in that: The surround is provided with a pattern structure.

8. The loudspeaker diaphragm according to claim 6, characterized in that: The speaker diaphragm further includes a basket bonding tape connected to the surround, and the basket bonding tape is arranged around the surround.

9. The loudspeaker diaphragm according to claim 6, characterized in that: The surround and the voice coil bonding tape, the dome are of an integral structure; or, The surround is adhesively connected to the voice coil bonding tape.

10. A loudspeaker, characterized in that: Comprising: The speaker diaphragm according to any one of claims 1 - 9, and a voice coil connected to the voice coil bonding tape.

11. An audio device, characterized in that: Comprising a housing and the speaker according to claim 10 provided in the housing.

Images