CN113573215A - Loudspeaker diaphragm, loudspeaker and audio equipment - Google Patents

Abstract

The application provides a loudspeaker diaphragm, speaker and audio equipment, loudspeaker diaphragm includes: a dome and a voice coil adhesive tape, wherein the dome includes a first region for improving high frequency characteristics of the speaker diaphragm, and a second region connected to the first region; the first region is an arc region, and the first region is nested outside the second region; the voice coil adhesive tape surrounds the first area and is connected with the first area. Divide into first region and second region through the adoption with the dome that is used for the sound production to through setting up the arc region that can improve high frequency characteristic with first region, strengthened the rigidity of dome through the arc region, and then improved the tone quality of speaker, need not additionally to increase the structure simultaneously, reduced the production degree of difficulty of speaker vibrating diaphragm.

Description

Loudspeaker diaphragm, loudspeaker and audio equipment

Technical Field

The invention relates to the technical field of loudspeakers, in particular to a loudspeaker diaphragm, a loudspeaker and audio equipment.

Background

The loudspeaker is an electroacoustic transducer which converts electric energy into sound energy and radiates the sound energy to a remote place in the air, and the moving-coil loudspeaker generally comprises a supporting 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 soft magnetic material top plate and a magnetic bowl, and the vibration system comprises a vibrating diaphragm and a voice coil. The vibration system is the core system of whole speaker, and the vibrating diaphragm is the most important part of vibration system, and the vibrating diaphragm divide into dome part and book ring part again, and the magnetic field that magnetic circuit produced drives the voice coil loudspeaker voice coil vibration to the effort of circular telegram voice coil loudspeaker voice coil, and the voice coil loudspeaker voice coil drives the vibrating diaphragm vibration, and the vibrating diaphragm promotes the air vibration and produces the sound, and the vibration state of vibrating diaphragm has directly influenced speaker acoustic properties such as size, frequency width scope, distortion performance of propagating the sound.

Nowadays, people pursue higher and higher tone quality, enjoying high-quality music requires that an audio device can propagate music signals without damage as much as possible, the frequency range of the music signals is wide, particularly, the overtone frequency of musical instruments such as violins and guitars reaches dozens of kHz and even dozens of kHz, and the frequency range of a loudspeaker is required to be large enough to propagate the signals without damage, so that the high frequency width becomes one of important indexes of the loudspeaker and also becomes a selling point of partial earphones.

The traditional method for increasing the frequency range of the loudspeaker is to increase the rigidity of the diaphragm material, i.e. to increase the young's modulus of the material, so as to increase the frequency range of the loudspeaker, for example, to perform metal (magnesium, aluminum, etc.) plating or carbon-based material (diamond, graphene, etc.) plating on the surface of the diaphragm. The method for realizing the high bandwidth has higher requirements on materials, higher cost (the common coating material is more expensive than a vibrating diaphragm base material), and difficult realization due to the spraying process, and is not suitable for large-scale production.

Disclosure of Invention

The application provides a loudspeaker vibrating diaphragm, a loudspeaker and audio equipment for improve the tone quality of loudspeaker, reduce the production degree of difficulty.

In a first aspect, a loudspeaker diaphragm is provided, which includes: a dome and a voice coil adhesive tape, wherein the dome includes a first region for improving 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; the first area is an arc-shaped area, and the radius of the arc-shaped area is smaller than that of the ball top; the voice coil adhesive tape surrounds the first area and is connected with the first area. Divide into first region and second region through the adoption with the dome that is used for the sound production to through setting up the arc region that can improve high frequency characteristic with first region, can strengthen the rigidity of dome through the arc region, and then improve the tone quality of speaker, need not additionally to increase the structure simultaneously, can better reduce the production degree of difficulty of speaker vibrating diaphragm.

In an alternative embodiment, the side wall of the first region may have a circular arc-shaped cross-section. The rigidity of the dome can be further enhanced, and the sound quality of the loudspeaker can be improved.

In an alternative embodiment, the loudspeaker diaphragm may satisfy the following condition: h2 is H1 with height of 40% -60%; w1< W2< H2; wherein H1 is the total height of the dome; h2 is the height of the first region; w1 is the width of the voice coil adhesive tape, and W2 is the width of the first region. This ensures that the first region has a height and width which improves the stiffness of the dome.

In an alternative embodiment, the loudspeaker diaphragm may further satisfy: theta 2 is 5-6 times of theta 1; wherein θ 1 is an included angle between the highest point of the second region and the first surface in the horizontal direction, and θ 2 is an included angle between a tangent of the starting point of the first region and the first surface; the first surface is the surface that voice coil bonding tape and voice coil bonded. This ensures that the first region has a height and width which improves the stiffness of the dome.

In an alternative embodiment, an angle between a tangent line of an end point of the first region in the direction of the dome height and a tangent line of a start point of the first region may range from 120 ° to 140 °; an angle of an angle between a tangent to a starting point of the first region and the first surface may range from 65 ° to 85 °. This ensures that the first region has a height and width which improves the stiffness of the dome.

In an alternative embodiment, the first region may also be provided with a stiffening structure for increasing the strength of the loudspeaker diaphragm. The rigidity of the dome is further increased through the reinforcing structure, and the sound quality of the loudspeaker is improved.

In an alternative embodiment, the reinforcing structure may select a plurality of reinforcing ribs, and the plurality of reinforcing ribs are disposed around the inner side wall of the first region. The rigidity of the dome is improved through the reinforcing ribs, and the tone quality of the loudspeaker can be improved.

In an alternative embodiment, a plurality of reinforcing ribs are uniformly arranged on the inner side wall of the first area to improve the rigidity of the top of the ball.

In an alternative embodiment, the bottom surface of the rib may be a flat surface, and the bottom surface is a surface of the rib facing the magnet of the speaker, to improve sound quality. In an alternative embodiment, the bottom surface of the ribs may also be rectangular or triangular.

In an alternative embodiment, the second region may be arcuate or tapered.

In an optional embodiment, the loudspeaker diaphragm may further include a corrugated rim connected to the voice coil adhesive tape, and the corrugated rim is disposed around the voice coil adhesive tape. In an alternative embodiment, the folding rings may be provided with a pattern to improve the structural strength of the folding rings.

In an optional embodiment, the loudspeaker diaphragm may further include a frame adhesive tape connected to the edge, the frame adhesive tape being disposed around the edge.

In an alternative embodiment, the edge, the voice coil adhesive tape and the ball top may be of an integral structure; or the folding ring is connected with the voice coil bonding tape in a bonding mode. Thus, the folding ring and the voice coil adhesive tape can be arranged in different modes.

In a second aspect, a speaker is provided, where the speaker includes the loudspeaker diaphragm described in any above, and a voice coil connected to the voice coil adhesive tape. Divide into first region and second region through the adoption with the dome that is used for the sound production to through setting up the arc region that can improve high frequency characteristic with first region, can strengthen the rigidity of dome through the arc region, and then improved the tone quality of speaker, need not additionally to increase the structure simultaneously, and then reduce the production degree of difficulty of loudspeaker diaphragm.

In a third aspect, there is provided an audio device comprising a housing and the loudspeaker of the second aspect as set forth above disposed within the housing.

Drawings

FIG. 1 is a flow chart of audio signal processing;

fig. 2 is an exploded schematic view of a diaphragm applied to a speaker according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of the speaker shown in FIG. 2;

fig. 4 is a schematic perspective view of a diaphragm provided in an embodiment of the present application;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is a schematic view of the curvature of the dome provided by an embodiment of the present application;

fig. 7 is a schematic structural diagram of another diaphragm provided in an embodiment of the present application;

FIG. 8 is a schematic view of a connection between a hinge and a dome according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of a connection between a hinge and a dome according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of another diaphragm provided in an embodiment of the present application;

FIG. 11 is a frequency response curve of a loudspeaker using a diaphragm of the present application versus a loudspeaker using a conventional diaphragm;

fig. 12 is an enlarged view of a portion of the graph in fig. 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.

To facilitate understanding of the loudspeaker diaphragm provided in the embodiments of the present application, an application scenario thereof will be described first. The loudspeaker diaphragm of this application embodiment can be applied to the speaker of audio frequency product (earphone, stereo set etc.) for music signal's broadcast supports and realizes music signal high-fidelity link transmission, provides high-quality music and experiences. As shown in fig. 1, the audio signal processing flow includes analog signals, input devices, a sound card, a disk file, a sound card, and output devices, and realizes all audio links: recording, decoding, power amplification and playing. The loudspeaker diaphragm that this application embodiment provided specifically can be arranged in output device (speaker), through promoting the sensitivity of speaker at the hyperfrequency, supports the broadcast of speaker to harmless music signal to realize the full audio link of (recording- > decoding- > power amplifier- > broadcast) of high resolution, transmit high-quality music, experience for the music that the consumer provided the top level. The structure of the loudspeaker diaphragm will be described in detail below with reference to the accompanying drawings, and for convenience of description, the loudspeaker diaphragm will be referred to as the diaphragm hereinafter.

Fig. 2 is an exploded schematic view of a diaphragm 101 applied to a speaker according to an embodiment of the present disclosure. The loudspeaker comprises a diaphragm 101, a voice coil 102, a pole piece 103, a magnet 104, a magnetic bowl 105, a frame 106, a PCB 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 form a magnetic circuit system for driving the diaphragm 101 to vibrate, and the first mesh 108 and the second mesh 109 can be applied to a speaker as optional components.

The connection of the various components of the loudspeaker will now be described with reference to fig. 3, in which fig. 3 shows a cross-sectional view of the loudspeaker shown in fig. 2. To facilitate understanding of the connection relationship between the diaphragm 101 and other parts of the loudspeaker, the structure of the diaphragm 101 will be described first. The diaphragm 101 includes a frame adhesive tape, a corrugated rim, a voice coil adhesive tape, and a dome. The dome is located in the central area of the diaphragm 101, and the voice coil adhesive tape, the folding ring and the frame adhesive tape are sequentially nested in the direction away from the central area to form the main structure of the diaphragm 101. When the diaphragm 101 is applied to a loudspeaker, a frame adhesive tape of the diaphragm 101 is fixedly connected with a frame 106, a voice coil 102 is fixedly connected with the voice coil adhesive tape, a pole piece 103 and a magnet 104 are stacked, the voice coil 102 is nested outside the assembled magnet 104 and pole piece 103, and the assembled magnet 104 and pole piece 103 are fixedly assembled in a magnetic bowl 105. The magnetic bowl 105 is fixedly connected with the frame 106, the PCB board 107 is fixedly arranged on the frame 106, and the PCB board 107 is connected with the voice coil 102 through a lead of the voice coil 102 so as to supply power to the voice coil 102. When the vibrating diaphragm is used, power supply to the voice coil 102 is controlled through the PCB 107, so that the magnetic circuit system consisting of the voice coil 102, the pole piece 103, the magnet 104 and the magnetic bowl 105 drives the vibrating diaphragm 101 to vibrate.

In an alternative arrangement, a first mesh 108 is secured to the frame 106 and a second mesh 109 is secured to the magnetic bowl 105, wherein the first mesh 108 and the second mesh 109 may be disposed in the speaker as an alternative configuration.

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

With continued reference to fig. 3, the diaphragm 101 provided in the embodiment of the present application is connected to the frame 106 through a frame adhesive tape to support the entire diaphragm 101, the voice coil adhesive tape is used to be connected to 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 a spherical cap. The vibrating diaphragm 101 provided by the embodiment of the application mainly relates to the top of a sphere of the vibrating diaphragm 101, and other structures (a voice coil adhesive tape, a folding ring and a basin frame adhesive tape) of the vibrating diaphragm 101 are applied to the vibrating diaphragm 101 of the application as optional structures. The following describes in detail a specific structure of the diaphragm 101 provided in an embodiment of the present application with reference to the drawings.

Referring first to fig. 4, fig. 4 illustrates a schematic perspective view of a diaphragm 101 provided in an embodiment of the present application. The dome 1011 is located the central zone of whole vibrating diaphragm 101, and its border is a circular, and voice coil bonding tape 1012, book ring 1013, basin frame bonding tape 1014 are loop configuration, and point outside direction nested in proper order along vibrating diaphragm 101 center: the voice coil adhesive tape 1012 is nested outside the dome 1011 and connected with the dome 1011, the folding ring 1013 is nested outside the voice coil adhesive tape 1012 and connected with the voice coil adhesive tape 1012, and the frame adhesive tape 1014 is nested outside the folding ring 1013 and connected with the folding ring 1013. The dome 1011 contains two areas: a first region 1011b and a second region 1011a connected to the first region 1011b, wherein the first region 1011b is a region for improving the high-frequency characteristics of the loudspeaker diaphragm 101. In a specific arrangement, the second area 1011a is a circular structure and is located in the central area of the sphere; the first area 1011b is a ring-shaped structure, and is nested outside the second area 1011a, and the voice coil adhesive tape 1012 surrounds the first area 1011b and is connected to the first area 1011 b. It should be understood that the first area 1011b and the second area 1011a described above are areas divided at the dome 1011 according to functions, the first area 1011b and the second area 1011a may be integrally prepared structures, and the connection of the first area 1011b and the second area 1011a may refer to a connection relationship formed by the two areas when integrally prepared.

In an optional scheme, the diaphragm 101 provided in this embodiment of the present application may be made of different materials, for example, the frame adhesive tape 1014, the corrugated rim 1013, the voice coil adhesive tape 1012, and the dome 1011 of the diaphragm 101 may be made of a high polymer material, such as PEEK, PET, PEN, PI, LCP, or may also be made of a multi-layer composite material composed of a high polymer material, a damping adhesive, and TPU. As an optional scheme, when the structure of the diaphragm 101 is prepared, a metal material may be added on the basis of the above material, and the metal material may be attached to the above material as a plating layer; or adding carbon material such as DLC (diamond-like carbon), carbon nanotube, graphene, microcrystalline graphite, etc. to the above material. It should be understood that, no matter which material is used to prepare the diaphragm 101, it is required to satisfy the requirement that the Young's modulus of the material of the diaphragm 101 is higher than 50MPa, and the density is lower than 3.0g/cm³。

Referring also to the cross-sectional view of FIG. 5 taken at A-A in FIG. 4, where the cut A-A passes through the center point of the diaphragm 101, some of the numbering in FIG. 5 may refer to the same numbering in FIG. 4. For convenience of description, a coordinate system is established with a section a-a, XOY denotes the section a-a, where X denotes a width direction and Y denotes a height direction, and hereinafter, the shape of the part, the height and the width of the part in the section are referred to as the shape of the part, the width and the height of the part. In addition, the inner sidewall and the sidewall of the first area 1011b are described, wherein the inner sidewall refers to one surface of the sidewall of the first area 1011b, and the sidewall refers to the sidewall structure of the first area 1011 b.

Referring also to fig. 6, the arcuate shape of the dome 1011 is illustrated in fig. 6. The first regionThe field 1011b and the second field 1011a are both arc-shaped fields, wherein the radius of the arc-shaped field of the first field is smaller than that of the dome; illustratively, the cross section of the side wall of the first area 1011B is an arc, as shown in fig. 6, an arc segment with a radius R1 is the first area 1011B, the starting point of the first area 1011B is point a (the connection point of the first area 1011B and the voice coil adhesive tape 1012), and the ending point is point B; the cross section of the sidewall of the second area 1011a is circular arc, and as shown in fig. 6, the arc segment with radius R2 is the second area 1011a, and the first area 1011B and the second area 1011a are tangent to point B. Wherein R2 is the same radius as the dome 1011, and R1 < R2, the above definition is to improve the high frequency characteristics of the diaphragm 101 by improving the strength of the dome 1011 to improve the dome 1011. Specifically, the height, the radian and the angle of the radian area of the first area 1011b can be defined as follows: the height, radian and angle of the radian area of the first area 1011b have a dimensional relation with the height of the ball top 1011, and the dimensional relation can be as follows: h2 is H1 with height of 40% -60%; w1<W2<H2；W2<H2 is a stiffness calculation formula S ═ π Et (sin θ 2)²A dimension relation derived from/cos θ 2, 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 θ 2 is an included angle between a tangent to the starting point (point a) of the first region 1011b and the first surface; the first surface is a surface to which the voice coil adhesive tape 1012 is adhered. H1 is the total height of the dome 1011, i.e. the vertical distance from point A to the highest point of the dome 1011; h2 is the height of the first area 1011B, i.e. the vertical distance from point a to point B; w1 is the width of the voice coil adhesive tape 1012, and W2 is the width of the first region 1011 b.

As one particular example, H2 may be a different size of 40%, 45%, 50%, 55%, 60%, etc. of the height of H1. H2 is adopted to be H1 with the height of 40-60 percent; w1< W2< H2, can guarantee that the shape of first area 1011b has great rigidity, W1< W2 can guarantee that the rigidity area (first area 1011b) has great area, can avoid vibrating diaphragm self bending vibration under the effect of voice coil vibration thrust, under the high-frequency vibration condition, namely, the voice coil amplitude is less, under the great condition of vibration frequency, first area 1011b and voice coil lug connection, can keep first area 1011b to have great dynamic rigidity, namely under the extremely fast condition of voice coil thrust change, the structural deformation of vibrating diaphragm 1011 is less, thereby guarantee high-frequency ductility, guarantee that vibrating diaphragm 101 can have certain high frequency characteristic at work.

With continued reference to fig. 6, the diaphragm 101 may further satisfy: theta 2 is 5-6 times of theta 1; wherein θ 1 is an included angle between the highest point of the second region 1011a and the first surface in the horizontal direction; θ 2 is an angle between a tangent to the starting point (point a) of the first region 1011b and the first surface; the first surface is a surface to which the voice coil adhesive tape 1012 is adhered. The first region 1011b is ensured to have a certain height and width to improve the rigidity of the dome 1011. For example, θ 2 may be 5 times, 5.5 times, 6 times, etc. different times of θ 1. For example, an angle θ 2 between a tangent line of the starting point (point a) of the first region 1011b and the first surface may range from 65 ° to 85 °, for example, θ 2 is different angles such as 65 °, 70 °, 75 °, 80 °, 85 °, and the like, and θ 1 may correspond to different angles such as 13 °, 14 °, 15 °, 20 °, and the like.

To more clearly illustrate the length and width of the first region 1011B, θ 3 is introduced, θ 3 is an angle between a tangent to an end point (point B) of the first region 1011B in the height direction of the dome 1011 and a tangent to a start point (point a) of the first region 1011B, θ 3 may range from 120 ° to 140 °, and the length and width of the first region 1011B may be defined by an angle between θ 3 and θ 2. Illustratively, θ 3 may be different angles of 120 °, 125 °, 130 °, 135 °, 140 °, and so on. The length and width of the first region 1011b can be clearly defined by the relationship between θ 2 and θ 3 and the corresponding relationship between θ 2 and θ 1. It is thereby possible to ensure that there is a sufficiently large area in the dome 1011 to improve the strength of the diaphragm 101, thereby improving the high-frequency characteristics of the diaphragm 101.

In another diaphragm 101 provided in the embodiment of the present application as shown in fig. 7, part of the numbers in fig. 7 may refer to the numbers in fig. 4. The first region shown in fig. 7 is provided with a reinforcing structure for increasing the strength of the loudspeaker diaphragm 101. The reinforcing structure can increase the rigidity of the dome 1011 and improve the sound quality of the speaker. In fig. 7, the reinforcing structure is a plurality of reinforcing ribs 1011c, and the number of the reinforcing ribs 1011c may be several or more than ten. When the reinforcing ribs 1011c are disposed, the plurality of reinforcing ribs 1011c may be disposed around the inner sidewall of the first area, for example, the plurality of reinforcing ribs 1011c may be disposed uniformly on the inner sidewall of the first area, or the plurality of reinforcing ribs 1011c may be disposed on the inner sidewall of the first area in a non-uniform arrangement.

In a particular embodiment, the height of the reinforcing ribs 1011c may be 40% to 60% of the height of the first region 1011b, i.e. H3 is 40% to 60% of the height of H2, wherein H3 is the height of the reinforcing ribs 1011 c. The width of the rib 1011c may be 1 to 2 times the width of the side wall of the first region 1011 b. To ensure that the ribs 1011c have sufficient structural strength to improve the strength of the dome 1011. In a specific preparation process, the reinforcing rib 1011c and the dome 1011 can be prepared in an integrated preparation manner. Alternatively, the rib 1011c may be fixedly connected to the first region 1011b by bonding or welding.

In an alternative, the bottom surface of each rib 1011c is a flat surface, and the bottom surface is the surface of the rib 1011c facing the magnet 104 of the speaker. So as to avoid the added reinforcing rib 1011c from affecting the sound quality of the loudspeaker.

In an alternative embodiment, the reinforcing rib 1011c may be a reinforcing rib 1011c with a different shape, for example, the bottom surface of the reinforcing rib 1011c may be a rectangle "□", or a triangle "Δ" or other shapes, which is not limited in this application.

In an optional scheme, in order to improve the structural strength of the diaphragm 101, the corrugated rim 1013 in the present application may further be provided with a pattern structure 10131, for example, the corrugated rim 1013 may adopt a "V" shaped pattern structure, a length direction of the pattern structure 10131 is directed to the voice coil adhesive tape 1012 along the frame adhesive tape 1014, and the structural strength of the corrugated rim 1013, and thus the structural strength of the diaphragm, may be improved by the "V" shaped pattern structure. It should be understood that the V-shaped pattern structure is merely a specific example, and the pattern structure 10131 provided in the present application by way of example may also be in other shapes, such as a wave-shaped pattern structure.

Referring to fig. 8 and 9 together, fig. 8 and 9 illustrate two different connection ways between the corrugated rim 1013 of the diaphragm 101 and the dome 1011, respectively. As shown in fig. 8, the edge 1013, the voice coil adhesive tape 1012, and the dome 1011 are integrally formed, and during the preparation, the edge 1013 and the dome 1011 can be integrally formed by hot pressing through a mold. Alternatively, the edge 1013 shown in fig. 9 may be adhesively attached to the voice coil adhesive tape 1012. During specific preparation, the folded ring 1013 and the dome 1011 are respectively formed by hot pressing through a die, the formed folded ring 1013 and the dome 1011 have an overlapped structure on the voice coil adhesive tape 1012, and the overlapped parts are adhered and connected through gluing adhesion, so that the connection between the folded ring 1013 and the dome 1011 is realized.

Referring to fig. 10, part numbers in fig. 10 refer to part numbers in fig. 4 for another structure of a diaphragm 101 provided in the embodiment of the present application. The second region 1011a shown in fig. 4 has a tapered structure, and the same effect can be achieved.

Can see through the concrete vibrating diaphragm of the example in the above-mentioned attached drawing, compare and improve the design with the vibrating diaphragm of present design this application to the dome, the dome of vibrating diaphragm comprises two segmentations, carry out the radian structural design (first region) of "arch" in vibrating diaphragm voice coil loudspeaker voice coil bonding area side dome region, with the structural strength who improves the vibrating diaphragm, and through the height to the first region, the radian, angle size relation carries out detailed definition, the vibrating diaphragm that ball top vibration leads to under the improvement high frequency condition warp, can restrain the segmentation vibration of high frequency, level and smooth high frequency response curve, and then reach the high-frequency width characteristic, and through be provided with the strengthening rib on the first region, further improve the structural strength of dome.

The vibrating diaphragm that this application embodiment provided realizes speaker unit's high-frequency width characteristic from improving the dome side structure, realizes high-frequency width characteristic through improving one section radian promptly, also can realize high-frequency characteristic through setting up multistage formula radian dome. In order to facilitate understanding of the effect of the diaphragm provided by the embodiment of the application. In addition, the diaphragm structure is only innovatively designed, complex process addition is not involved, special materials are not used, the requirement for enlarging the size and the shape of the loudspeaker is not needed, the occupied space is small, and the production difficulty of the diaphragm of the loudspeaker is reduced. For the convenient vibrating diaphragm that understands this application embodiment and provide, will use this application scheme vibrating diaphragm design speaker and contrast conventional vibrating diaphragm design speaker frequency response curve contrast.

As shown in fig. 11 and 12, fig. 11 is a frequency response curve of a speaker using the diaphragm of the present application and a speaker using a conventional diaphragm. Wherein, the abscissa is Frequency (Frequency), unit Hz (joint cost); the ordinate is the sound pressure level (SPL, sound, pressure level), the solid line of the unit db (decibel) is the speaker using the conventional diaphragm, and the dotted line is the speaker using the diaphragm 101 according to the embodiment of the present application. Fig. 12 is an enlarged view of a portion of the graph in fig. 11. Referring first to fig. 11, the solid line steeply drops at 40kHz, the SPL at 50kHz is only 62dB, the dashed line still has 78dB at 50kHz, and the bandwidth broadening effect is significant. As shown in fig. 12, the solid line has an obvious peak at 20kHz to 30kHz, while the dotted line does not have this peak, and the dotted line smoothes the frequency response curve while expanding the bandwidth, so as to improve the experience of high-frequency sound quality.

The embodiment of the application further provides a loudspeaker, and the loudspeaker provided by the embodiment of the application can be applied to audio playing module scenes of equipment such as earphones, sound equipment, televisions and mobile phones. The loudspeaker comprises the loudspeaker diaphragm and the voice coil connected with the voice coil adhesive tape. The structure of the speaker can specifically refer to the detailed descriptions of fig. 2 and fig. 3, and is not described in detail herein. The vibrating diaphragm that this application embodiment provided realizes speaker unit's high-frequency width characteristic from improving the dome side structure, realizes high-frequency width characteristic through improving one section radian promptly, also can realize high-frequency characteristic through setting up multistage formula radian dome. In order to facilitate understanding of the effect of the diaphragm provided by the embodiment of the application. In addition, the diaphragm structure is only innovatively designed, complex process addition is not involved, special materials are not used, the requirement for size and appearance expansion of the loudspeaker is not needed, and the occupied space is small.

The embodiment of the application also provides audio equipment which can be equipment such as earphones, sound equipment, televisions and mobile phones. The audio device comprises a housing and the loudspeaker arranged in the housing. The vibrating diaphragm that this application embodiment provided realizes speaker unit's high-frequency width characteristic from improving the dome side structure, realizes high-frequency width characteristic through improving one section radian promptly, also can realize high-frequency characteristic through setting up multistage formula radian dome. In order to facilitate understanding of the effect of the diaphragm provided by the embodiment of the application. In addition, the diaphragm structure is only innovatively designed, complex process addition is not involved, special materials are not used, the requirement for size and appearance expansion of the loudspeaker is not needed, and the occupied space is small.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (15)

1. A loudspeaker diaphragm, comprising: a dome and a voice coil adhesive tape, wherein,

the dome comprises a first area for improving the high-frequency characteristic of the loudspeaker diaphragm and a second area connected with the first area; the first region is nested outside the second region;

the first area is an arc-shaped area, and the radius of the arc-shaped area is smaller than that of the ball top;

the voice coil adhesive tape surrounds the first area and is connected with the first area.

2. The loudspeaker diaphragm of claim 1 where the sidewall of the first region has a circular arc cross-section.

3. The loudspeaker diaphragm according to claim 1 or 2, wherein the loudspeaker diaphragm satisfies the following condition:

h2 is H1 with height of 40% -60%;

W1<W2<H2；

wherein the H1 is the total height of the dome; the H2 is the height of the first region; the W1 is the width of the voice coil adhesive tape, and the W2 is the width of the first region.

4. The loudspeaker diaphragm of any one of claims 1 to 3, wherein the loudspeaker diaphragm satisfies:

theta 2 is 5-6 times of theta 1;

the theta 1 is an included angle between the highest point of the second region and the first surface in the horizontal direction, and the theta 2 is an included angle between a tangent of the starting point of the first region and the first surface;

the first surface is the surface that voice coil bonding tape and voice coil bonded.

5. The loudspeaker diaphragm of claim 4 where the angle between the tangent to the end point of the first region in the direction of the height of the dome and the tangent to the start point of the first region is in the range of 120-140 °;

the angle range of the included angle between the tangent of the starting point of the first area and the first surface is 65-85 degrees.

6. The loudspeaker diaphragm of any one of claims 1 to 5, wherein the first region is provided with a reinforcing structure for increasing the strength of the loudspeaker diaphragm.

7. The loudspeaker diaphragm of claim 6 where the stiffening structure is a plurality of ribs and the plurality of ribs are circumferentially disposed on an inner sidewall of the first region.

8. The loudspeaker diaphragm of claim 7 where the bottom surface of the rib is planar and the bottom surface is the surface of the rib facing the magnet of the loudspeaker.

9. The loudspeaker diaphragm of any one of claims 1 to 8 where the second region is arcuate or tapered.

10. The loudspeaker diaphragm of any one of claims 1 to 9, further comprising a corrugated rim connected to the voice coil adhesive tape, wherein the corrugated rim is disposed around the voice coil adhesive tape.

11. The loudspeaker diaphragm of claim 10 where the edge is provided with a textured structure.

12. The loudspeaker diaphragm of claim 10 or 11, further comprising a frame adhesive tape connected to the edge, the frame adhesive tape being disposed around the edge.

13. The loudspeaker diaphragm of claim 10, 11 or 12 where the edge, the voice coil adhesive tape, and the dome are of a unitary construction; or the like, or, alternatively,

the folding ring is connected with the voice coil bonding tape in a bonding mode.

14. A loudspeaker, comprising: the loudspeaker diaphragm of any one of claims 1 to 13, and a voice coil connected to the voice coil adhesive tape.

15. An audio device comprising a housing and the speaker of claim 14 disposed within the housing.

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