CN219372586U

CN219372586U - Electroacoustic device

Info

Publication number: CN219372586U
Application number: CN202320307425.1U
Authority: CN
Inventors: 邓宏国; 王传波
Original assignee: Shenzhen Dancing Future Technology Ltd
Current assignee: Shenzhen Dancing Future Technology Ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-07-18
Anticipated expiration: 2033-02-15

Abstract

The utility model discloses an electroacoustic device, which comprises a mounting frame, a magnetic circuit assembly arranged on the mounting frame, a voice coil for cutting magnetic induction lines of the magnetic circuit assembly, and a vibrating diaphragm fixedly connected with the voice coil; the voice coil loudspeaker voice coil is through the bullet ripples and the mounting bracket fixed connection that are equipped with. According to the utility model, the elastic wave is arranged between the voice coil and the mounting frame and is an FPC product, so that the voice coil has good restoring force, the voice coil is prevented from generating forces which are not parallel to the vibration direction of the vibrating diaphragm and change at different positions of the magnetic field of the magnetic circuit assembly due to the movement of the voice coil, the vibrating diaphragm is prevented from vibrating in a nonlinear manner, and the low-frequency distortion of the vibrating diaphragm is improved.

Description

Electroacoustic device

Technical Field

The utility model relates to the technical field of electroacoustic, in particular to an electroacoustic device.

Background

At present, in order to meet the functional requirements, many loudspeakers adopt a double magnetic circuit design. Also, many loudspeaker profiles are racetrack or square in design, so that the shape of the sound-emitting diaphragm also follows the profile design of the loudspeaker. Due to the vibrating diaphragmThe vibration ring is also track-shaped or square, the symmetric vibration of the vibration film is worse than that of a circular shape, and meanwhile, the bass of the small-caliber loudspeaker is difficult to show at a small amplitude, so that the bass can be replayed only at a large amplitude, and when the large amplitude is generated under the large driving force of the voice coil, the distortion is increased, and the replay effect of the bass is poor. In order to solve the problem of large distortion in the prior art, the equivalent compliance Cms of the folded ring is improved, but the resonant frequency is caused at the same timeHigh problems affect the low frequency playback capability of the speaker.

Wherein equivalent compliance C _ms The flexibility of the supporting component of the loudspeaker vibration system, such as the flexibility of the bending ring and the elastic wave of the loudspeaker, the larger the flexibility of the supporting component is, the softer the whole vibration system of the loudspeaker is, and the lower the resonance frequency of the vibration system is under the condition that other influencing factors of the vibration system are unchanged. Wherein, equivalent compliance unit: millimeter/newton (mm/N), M _ms Equivalent mass, in g.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, ensure that a loudspeaker vibration system has lower resonant frequency, reduce nonlinear distortion of a loudspeaker and provide an electroacoustic device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an electroacoustic device comprises a mounting frame, a magnetic circuit assembly arranged on the mounting frame, a voice coil for cutting magnetic induction lines of the magnetic circuit assembly, and a vibrating membrane fixedly connected with the voice coil; the voice coil loudspeaker voice coil is through the bullet ripples and the mounting bracket fixed connection that are equipped with.

The further technical scheme is as follows: the elastic wave is FPC (FlexiblePrintedCircuit) product, namely flexible circuit board product.

The further technical scheme is as follows: the elastic wave comprises a connecting part fixedly connected with the voice coil, a mounting part fixedly connected with the mounting frame and a transition part arranged between the connecting part and the mounting part; the transition portion has elasticity.

The further technical scheme is as follows: the transition part is of a strip-shaped structure, and is of a strip-shaped structure and is designed in a roundabout structure.

The further technical scheme is as follows: the thickness of the strip-shaped structure is 0.1mm-0.4mm, and the width is 0.3mm-1.2mm.

The further technical scheme is as follows: the detour structure comprises at least one U-shaped structure, and the arc radian of the U-shaped structure is 120-240 degrees.

The further technical scheme is as follows: the mounting frame is provided with a connecting sheet electrically connected with the elastic wave.

The further technical scheme is as follows: the vibrating diaphragm is of a flat structure; the voice coil is fixed at one side of the diaphragm.

The further technical scheme is as follows: the vibrating diaphragm comprises a mounting part, a folded ring part and a vibrating part; the installation part is fixedly connected with the installation frame; the voice coil is fixedly connected with the vibration part.

The further technical scheme is as follows: the ring folding part is of a U-shaped or semicircular ring structure protruding or sinking from the vibrating part.

The further technical scheme is as follows: the magnetic circuit assembly comprises a first magnet block; the voice coil moves along the magnetic induction lines perpendicular to the first magnet block.

The further technical scheme is as follows: the magnetic circuit assembly further comprises a second magnet block; a gap is arranged between the first magnet block and the second magnet block; the voice coil is positioned in the gap motion.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the elastic wave is arranged between the voice coil and the mounting frame and is an FPC product, so that the voice coil has good restoring force, the voice coil is prevented from generating forces which are not parallel to the vibration direction of the vibrating diaphragm and change at different positions of the magnetic field of the magnetic circuit assembly due to the movement of the voice coil, the vibrating diaphragm is prevented from vibrating in a nonlinear manner, and the low-frequency distortion of the vibrating diaphragm is improved.

The foregoing description is only an overview of the present utility model, and is intended to be more clearly understood as being carried out in accordance with the following description of the preferred embodiments, as well as other objects, features and advantages of the present utility model.

Drawings

Fig. 1 is a perspective view of an electroacoustic device of the present utility model;

fig. 2 is an exploded view of an electroacoustic device of the present utility model;

fig. 3 is a perspective view of an elastic wave of an electroacoustic device according to the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be attached, detached, or integrated, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.

Fig. 1 to 3 are drawings of the present utility model.

The present embodiment provides an electroacoustic device, please refer to fig. 1 and 2, which includes a mounting frame 10, a magnetic circuit assembly 20 disposed on the mounting frame 10, a voice coil 30 for cutting magnetic induction lines of the magnetic circuit assembly 20, and a diaphragm 40 fixedly connected with the voice coil 30. The voice coil 30 is fixedly connected with the mounting frame 10 through a spring wave 50. The elastic wave 50 can make the voice coil 30 have a better restoring force, prevent the voice coil 30 from generating a force which is not parallel to the vibrating direction of the vibrating diaphragm and changes at different positions of the magnetic field of the magnetic circuit assembly 20 due to the motion of the voice coil 30, avoid the vibrating diaphragm 40 from vibrating in a nonlinear manner, and improve the low-frequency distortion of the vibrating diaphragm 40.

The elastic wave 50 is a flexible circuit board product, namely a FPC (FlexiblePrintedCircuit) product, so that the voice coil 30 can have certain elasticity, and the voice coil 30 can be connected with a circuit. Preferably, the thickness of the FPC product is 0.1 to 0.4mm, and the thickness of the FPC product may be adjusted by the thickness of the substrate, or the thickness of the copper foil, or the thickness of both the substrate and the copper foil, and the width of the FPC product is 0.3mm to 1.2mm.

The elastic wave 50 is an FPC product, and the equivalent compliance of the vibrating membrane 40 can be effectively adjusted by adjusting the material proportion, thickness and width of the FPC, so that the resonant frequency is reducedThe extension of low frequencies is improved to improve the effect of bass reproduction.

Referring to fig. 1 and 3, the damper 50 includes a connection portion 51 fixedly connected to the voice coil 30, a mounting portion 52 fixedly connected to the mounting frame 10, and a transition portion 53 disposed between the connection portion 51 and the mounting portion 52. The transition 53 has elasticity. The transition portion 53 is suspended, and is not supported or touched by other members, so that the vibration of the diaphragm 40 is not disturbed.

In the present embodiment, the connection portion 51, the mounting portion 52, and the transition portion 53 are located on the same plane.

Preferably, the transition portion 53 has a strip-shaped structure and is designed with a roundabout structure, so that the transition portion 53 has better elasticity. Specifically, the transition 53 includes at least one U-shaped structure. All U-shaped structures are arranged on the same plane. The arc degree of the arc shape of the U-shaped structure is 120-240 degrees, and the equivalent compliance can be adjusted by adjusting the arc degree and the length of the roundabout structure.

In other embodiments, the transition 53 includes at least one V-shaped structure, semi-circular.

Preferably, the mounting frame 10 is provided with a connection piece 11 electrically connected to the damper 50, wherein the connection piece 11 is used as an electrical connection wire of the damper 50 to input an electrical signal to the voice coil 30.

Preferably, the vibration direction of the diaphragm 40 is parallel to the direction of the magnetic induction lines of the magnetic circuit assembly 20 cut by the voice coil 30, so that the magnetic induction lines of the magnetic circuit assembly 20 can be cut with maximum efficiency.

Wherein the edge of the diaphragm 40 is fixedly connected with the mounting frame 10. In this application, the contour of the diaphragm 40 is fitted to the contour of the mount 10, increasing the vibration area.

The diaphragm 40 has a flat structure. The voice coil 30 is fixed to one side of the diaphragm 40 such that upon energization of the voice coil 30, the moving diaphragm 40 of the voice coil 30 vibrates, thereby emitting sound.

The diaphragm 40 includes a fixing portion 41, a bellows portion 42, and a vibrating portion 43. The fixing portion 41, the folded ring portion 42, and the vibration portion 43 are connected in this order. The fixing portion 41 is fixedly connected to the mounting frame 10. The voice coil 30 is fixedly connected to the vibration part 43.

Preferably, the folded ring portion 42 has a U-shaped or semicircular ring structure protruding or recessed from the vibration portion.

The vibrating portion 43 of the diaphragm 40 has a planar design in the form of a racetrack, and the ratio of the area of the vibrating portion 43 to the entire area of the diaphragm 40 is between 0.37 and 0.6. More preferably, the vibration part 43 is made of aluminum composite polymethacrylimide foam (PMI) material, and has a high-pitched reduction effect.

The cross section of the ring-folding part 42 of the vibrating membrane 40 is convex circular, and reinforcing ribs are added on the circular parts at the two ends of the ring-folding part 42, so that the rigidity of the vibrating membrane 40 is enhanced, the deformation of the vibrating membrane 40 during vibration is reduced, and the distortion of a middle-high frequency band is reduced.

Preferably, the ratio of the area of the folded ring portion 42 to the entire area of the diaphragm 40 is between 0.35 and 0.45. The ring portion 42 is made of soft material, such as silica gel or polyurethane. More preferably, the hinge portion 42 is made of Polyurethane (PU).

In one embodiment, the magnetic circuit assembly 20 includes a first magnet block 21. The voice coil 30 moves in a magnetic induction line perpendicular to the first magnet piece 21. After the voice coil 30 is energized, it moves on one side of the first magnet piece 21, and performs a cutting motion in the magnetic field formed by the first magnet piece 21.

In another embodiment, the magnetic circuit assembly 20 includes a first magnet block 21 and a second magnet block 22. A gap 23 is provided between the first magnet block 21 and the second magnet block 22. The voice coil 30 is positioned in the gap 23 for movement. The magnetic field of the gap 23 is a superposition of the first magnet piece 21 and the second magnet piece 22, so that the space where the voice coil 30 moves has a stronger magnetic field.

The second magnet pieces 22 are two and are provided on both sides of the first magnet piece 21, so that the first magnet piece 21 and the second magnet piece 22 form two gaps 23. In this application, the voice coil 30 has a rectangular structure, so the gap 23 surrounds both sides of the first magnet block 21, and the voice coil 30 is formed to move around the outside of the first magnet block 21. The voice coil 30 is acted by the magnetic field force generated by the first magnet block 21 and the second magnet block 22 together, so that the voice coil 30 is subjected to larger magnetic field force, and the vibration amplitude of the vibration film 40 is larger, and the action is more sensitive.

Compared with the prior art, the elastic wave 30 is arranged between the voice coil 30 and the mounting frame 10, and the elastic wave 30 is an FPC product, so that the voice coil 30 has better restoring force, the voice coil 30 is prevented from generating force which is not parallel to the vibrating direction of the vibrating diaphragm and changes due to the motion of the voice coil 30, the vibrating diaphragm 40 is prevented from vibrating in a nonlinear manner, and the low-frequency distortion of the vibrating diaphragm 40 is improved. The foregoing examples are provided to further illustrate the technical contents of the present utility model for the convenience of the reader, but are not intended to limit the embodiments of the present utility model thereto, and any technical extension or re-creation according to the present utility model is protected by the present utility model. The protection scope of the utility model is subject to the claims.

Claims

1. The electroacoustic device is characterized by comprising a mounting frame, a magnetic circuit assembly arranged on the mounting frame, a voice coil for cutting magnetic induction lines of the magnetic circuit assembly and a vibrating membrane fixedly connected with the voice coil; the voice coil loudspeaker voice coil is through the bullet ripples and the mounting bracket fixed connection that are equipped with.

2. The electroacoustic device of claim 1 wherein said elastic wave is a flexible circuit board product.

3. The electroacoustic device of claim 2 wherein the spring comprises a connection portion fixedly connected to the voice coil, a mounting portion fixedly connected to the mounting frame, and a transition portion disposed between the connection portion and the mounting portion; the transition portion has elasticity.

4. An electroacoustic device according to claim 3 wherein said transition is of a strip-like configuration and is of a serpentine configuration.

5. An electroacoustic device according to claim 4 wherein said strip-like structure has a thickness of 0.1mm to 0.4mm and a width of 0.3mm to 1.2mm.

6. An electroacoustic device according to claim 4 wherein said circuitous structure comprises at least one U-shaped structure having an arc of 120 ° -240 °.

7. An electroacoustic device according to claim 2, wherein the mounting frame is provided with a connecting piece electrically connected to the spring wave.

8. An electroacoustic device according to claim 1 wherein said diaphragm is of flat construction; the voice coil is fixed at one side of the diaphragm.

9. The electroacoustic device of claim 1 wherein the diaphragm comprises a mounting portion, a bellows portion, and a vibrating portion; the installation part is fixedly connected with the installation frame; the voice coil is fixedly connected with the vibration part.

10. An electroacoustic device according to claim 9 wherein said bellows portion is of a U-shaped or semi-circular annular configuration protruding or recessed from the vibrating portion.

11. The electroacoustic device of claim 10 wherein said magnetic circuit assembly comprises a first magnet block; the voice coil moves along the magnetic induction lines perpendicular to the first magnet block.

12. The electroacoustic device of claim 11 wherein said magnetic circuit assembly further comprises a second magnet block; a gap is arranged between the first magnet block and the second magnet block; the voice coil is positioned in the gap motion.