CN219305021U

CN219305021U - External magnetic dome speaker capable of effectively reducing low-frequency range

Info

Publication number: CN219305021U
Application number: CN202223304245.2U
Authority: CN
Inventors: 徐学乾
Original assignee: Shenzhen Tianze Speaker Co ltd
Current assignee: Shenzhen Tianze Speaker Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-07-04
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses an external magnetic dome speaker capable of effectively reducing a low-frequency range, which comprises a magnetic circuit assembly, a vibration assembly and a bracket, wherein the vibration assembly is arranged in the bracket, and a rear cavity is formed at the bottom of the vibration assembly; the support cover is arranged on the magnetic circuit assembly, a first cavity is formed between the support and the magnetic circuit assembly, and the first cavity is communicated with the rear cavity. The utility model has reasonable and ingenious design, compact structure and simple assembly, and the space of the rear cavity is enlarged by adding the gap between the bracket and the magnetic circuit assembly, so that the effect of effectively reducing the low-frequency range of the external magnetic dome loudspeaker is realized, and the performance of the loudspeaker is improved.

Description

External magnetic dome speaker capable of effectively reducing low-frequency range

Technical Field

The utility model relates to the technical field of speakers, in particular to an external magnetic dome speaker capable of effectively reducing a low-frequency range.

Background

The traditional external magnetic (i.e. the inner diameter of the magnet is larger than the outer diameter of the coil) dome loudspeaker mainly comprises a magnetic circuit assembly consisting of T iron, an external magnet and an upper magnetic conduction plate, a voice coil, a vibration assembly and a bracket; the support is used for installing the vibration assembly, the bottom of the support is of a plane structure generally, the bottom of the support is in contact with the top of the magnetic circuit directly, and the support and the magnetic circuit assembly are fastened through screws.

The method for reducing the low-frequency range of the external magnetic dome speaker is generally adopted as follows: the rear cover is added behind the T iron, the through hole is formed in the center of the T iron, and the through hole is communicated with the inner cavity of the rear cover and the rear cavity at the bottom of the vibration assembly, so that the space of the rear cavity is expanded, and the low-frequency range of the loudspeaker is further reduced. However, this method has the following drawbacks: in order to avoid sensitivity loss caused by the fact that the T-shaped iron section is close to magnetic saturation, the aperture of the through hole can only be set to be smaller, so that a small and long sound pipeline can be formed, acoustic impedance of the sound pipeline is different along with different frequencies, collapse can occur on a curve of a low frequency band of the loudspeaker, meanwhile, an impedance curve is not smooth, and the performance of the loudspeaker is further affected.

Disclosure of Invention

The utility model aims to provide an external magnetic dome speaker capable of effectively reducing a low-frequency range so as to solve the problems in the background art. In order to achieve the above purpose, the present utility model provides the following technical solutions:

the external magnetic dome loudspeaker capable of effectively reducing the low-frequency range comprises a magnetic circuit assembly, a vibration assembly and a bracket, wherein the vibration assembly is arranged in the bracket, and a rear cavity is formed at the bottom of the vibration assembly; the support cover is arranged on the magnetic circuit assembly, a first cavity is formed between the support and the magnetic circuit assembly, and the first cavity is communicated with the rear cavity.

Further, a flange is arranged on the periphery side of the bottom of the bracket, and the flange is in contact with the top of the magnetic circuit assembly, so that a first cavity is formed between the bracket and the magnetic circuit assembly.

Further, a first sound-absorbing cotton is arranged in the first cavity.

Further, the vibration assembly comprises a dome membrane and a membrane folding ring connected to the periphery of the dome membrane, a second cavity is formed at the bottom of the membrane folding ring, a third cavity is formed at the bottom of the dome membrane, and the second cavity is respectively communicated with the first cavity and the third cavity.

Further, the vibration assembly further comprises a voice coil, the voice coil is connected to the bottom of the vibration assembly, a through hole is formed in the side wall of the voice coil, and the through hole is communicated with the second cavity and the third cavity.

Further, the magnetic circuit assembly comprises T iron, the voice coil is sleeved at the tail end of a middle column body of the T iron, and the tail end of the middle column body of the T iron is provided with a groove.

Further, second sound-absorbing cotton is arranged in the groove.

The utility model has the beneficial effects that: the utility model has reasonable and ingenious design, compact structure and simple assembly, and the space of the rear cavity is enlarged by adding the gap between the bracket and the magnetic circuit assembly, so that the effect of effectively reducing the low-frequency range of the external magnetic dome loudspeaker is realized, and the performance of the loudspeaker is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of a vibration assembly and voice coil according to the present utility model.

It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

Detailed Description

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 be within the scope of the utility model.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. 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.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

It is also to be understood that the terminology used in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As shown in fig. 1 and 2, an external magnetic dome speaker for effectively reducing a low frequency range comprises a magnetic circuit assembly 1, a vibration assembly 2 and a bracket 3, wherein the vibration assembly 2 is arranged in the bracket 3, and a rear cavity is formed at the bottom of the vibration assembly 2; the support 3 is covered on the magnetic circuit assembly 1, a first cavity 101 is formed between the support 3 and the magnetic circuit assembly 1, and the first cavity 101 is communicated with the rear cavity.

In the embodiment of the application, the first cavity 101 is formed by increasing the gap between the bracket 3 and the magnetic circuit assembly 1; and the first cavity 101 is connected and communicated with the rear cavity at the bottom of the vibration component 2, so that the space of the rear cavity is enlarged, and the reduction effect of the rear cavity on the low-frequency range of the external magnetic ball loudspeaker is improved. Compared with the external magnetic ball top loudspeaker in the prior art, the embodiment skillfully increases the gap between the bracket 3 and the magnetic circuit component 1 to enlarge the space of the rear cavity, and realizes the effect of effectively reducing the low-frequency range of the external magnetic ball loudspeaker, thereby replacing the traditional design of expanding the rear cavity by arranging a through hole in the T iron 11 and adding a rear cover at the bottom of the T iron 11, shortening the distance between the increased space and the rear cavity, avoiding forming an acoustic pipeline in the through hole of the T iron 11, eliminating the influence of the acoustic pipeline on a low-frequency curve, ensuring that the rear cavity can stably and effectively reduce the low-frequency range of the loudspeaker, and improving the performance of the loudspeaker; and because the rear cover at the bottom of the T iron 11 is cancelled, the structure of the external magnetic ball top loudspeaker is more compact, the structure and the assembly process of the loudspeaker are simplified, and the material cost is saved. The utility model has the advantages that: reasonable in design ingenious, compact structure, the assembly is simple, through increasing the space in clearance in order to enlarge the back chamber between support and magnetic circuit subassembly, realizes effectively reducing the effect of outer magnetic ball top speaker low frequency range, improves the speaker performance.

Further, a flange 31 is provided on the bottom peripheral side of the bracket 3, and the flange 31 is in contact with the top of the magnetic circuit assembly 1 so that a first cavity 101 is formed between the bracket 3 and the magnetic circuit assembly 1. Specifically, through setting up bellied flange 31 structure downwards in support 3 bottom, utilize flange 31 structure to carry out the overhead raising with the bottom surface of support 3: on the one hand, the gap between the bracket 3 and the magnetic circuit assembly 1 can be increased, so that a first cavity 101 is formed, and the first cavity 101 is connected with a rear cavity at the bottom of the vibration assembly 2 to be communicated, so that the space of the rear cavity is enlarged; on the other hand, as the bottom surface of the bracket 3 is elevated by the flange 31 structure, the vibrating assembly 2 on the bracket 3 is correspondingly elevated, so that the space of the rear cavity at the bottom of the vibrating assembly 2 is further enlarged; through simple flange structure, the space that makes the back chamber realizes expanding from two directions, and then improves the reduction effect of back chamber to external magnetic ball speaker low frequency range.

Further, the first sound absorbing cotton 32 is provided in the first cavity 101. Specifically, the first sound absorbing cotton 32 is used for absorbing reflected waves generated when the vibration component 2 is true, preventing standing waves from occurring in the rear cavity, eliminating distortion, enabling the tone quality to be purer, enabling the tone color to be more pleasant, and improving the tone quality effect of the loudspeaker.

Further, the vibration assembly 2 includes a dome membrane 21 and a membrane folding ring 22 connected to the periphery of the dome membrane 21, a second cavity 201 is formed at the bottom of the membrane folding ring 22, a third cavity 202 is formed at the bottom of the dome membrane 21, and the second cavity 201 is respectively communicated with the first cavity 101 and the third cavity 202. Specifically, the second cavity 201 and the third cavity 202 are connected and communicated to form a rear cavity of the vibration assembly 2; the rear cavity is connected and communicated with the first cavity 101 through the second cavity 201, so that the space of the rear cavity is enlarged, and the effect of the rear cavity on reducing the low-frequency range of the external magnetic ball loudspeaker is improved.

Further, the vibration assembly further comprises a voice coil 4, the voice coil 4 is connected to the bottom of the vibration assembly 2, a through hole 41 is formed in the side wall of the voice coil 4, and the through hole 41 is communicated with the second cavity 201 and the third cavity 202. Specifically, the through holes 41 are uniformly distributed along the circumferential direction of the voice coil 4, so that the connection and penetration of the second cavity 201 and the third cavity 202 are realized, and the space air pressure difference at two sides of the voice coil 4 is in an optimal balance state; in addition, the mass of the voice coil 4 can be reduced, so that the load of the vibration assembly 2 is reduced, and the sensitivity of the vibration assembly 2 is improved; thereby improving the performance of the external magnetic dome speaker.

Further, the magnetic circuit assembly 1 includes a T-iron 11, the voice coil 4 is sleeved at the end of the middle cylinder of the T-iron 11, and the end of the middle cylinder of the T-iron 11 is provided with a groove 111. Specifically, the groove 111 is formed at the tail end of the middle column body of the T iron 11, so that the space of the third cavity 202 at the bottom of the dome membrane 21 is further increased, the expansion of the rear cavity is realized, and the effect of the rear cavity on reducing the low-frequency range of the external magnetic ball loudspeaker is further improved.

Further, a second sound absorbing cotton 12 is provided in the groove 111. Specifically, the groove 111 arranged at the tail end of the middle column body of the T iron 11 is filled with the second sound absorbing cotton 12, so that reflected waves generated during vibration of the vibrating diaphragm can be absorbed, standing waves are prevented from occurring in the rear cavity of the vibrating diaphragm, and meanwhile, a mechanical damping effect is achieved during resonance, so that distortion is eliminated, sound quality is purer, tone color is more pleasant, and the effect of improving the sound quality of the loudspeaker is obvious.

It should also be noted that, in the embodiments of the present utility model, the features of the embodiments of the present utility model and the features of the embodiments of the present utility model may be combined with each other to obtain new embodiments without conflict.

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model as defined in the claims. Although the present utility model has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the utility model, and it is intended to cover all such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. An external magnetic dome speaker capable of effectively reducing a low frequency range, which is characterized in that: the vibration device comprises a magnetic circuit assembly, a vibration assembly and a bracket, wherein the vibration assembly is arranged in the bracket, and a rear cavity is formed at the bottom of the vibration assembly; the support cover is arranged on the magnetic circuit assembly, a first cavity is formed between the support and the magnetic circuit assembly, and the first cavity is communicated with the rear cavity.

2. The external magnetic dome speaker of claim 1 effective to reduce a low frequency range, wherein: the flange is arranged on the periphery side of the bottom of the bracket and is contacted with the top of the magnetic circuit assembly, so that a first cavity is formed between the bracket and the magnetic circuit assembly.

3. The external magnetic dome speaker of claim 2 effective to reduce a low frequency range, wherein: a first sound absorbing cotton is arranged in the first cavity.

4. The external magnetic dome speaker of claim 2 effective to reduce a low frequency range, wherein: the vibration assembly comprises a dome membrane and a membrane folding ring connected to the periphery of the dome membrane, a second cavity is formed at the bottom of the membrane folding ring, a third cavity is formed at the bottom of the dome membrane, and the second cavity is respectively communicated with the first cavity and the third cavity.

5. The external magnetic dome speaker of claim 4 effective to reduce a low frequency range, wherein: the voice coil loudspeaker voice coil still includes, the voice coil loudspeaker voice coil connect in vibrating subassembly bottom, the through-hole has been seted up to the voice coil loudspeaker voice coil lateral wall, the through-hole intercommunication the second cavity with the third cavity.

6. The external magnetic dome speaker of claim 5 effective to reduce a low frequency range, wherein: the magnetic circuit assembly comprises T iron, the voice coil is sleeved at the tail end of a middle column body of the T iron, and a groove is formed in the tail end of the middle column body of the T iron.

7. The external magnetic dome speaker of claim 6, wherein the external magnetic dome speaker is effective to reduce a low frequency range, wherein: and second sound-absorbing cotton is arranged in the groove.