CN114222229A

CN114222229A - Electret loudspeaker

Info

Publication number: CN114222229A
Application number: CN202111662322.9A
Authority: CN
Inventors: 何越
Original assignee: Shenzhen Yuanze Electronics Co ltd
Current assignee: Shenzhen Yuanze Electronics Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-03-22

Abstract

The invention belongs to the technical field of loudspeakers, and particularly relates to an electret loudspeaker which comprises a shell, a first magnetic circuit system and a second magnetic circuit system, wherein a containing cavity is arranged in the shell, the electret loudspeaker also comprises a magnetic conduction vibrating diaphragm, the magnetic conduction vibrating diaphragm is arranged between the first magnetic circuit system and the second magnetic circuit system, and a convex vibration enhancing part is arranged on the magnetic conduction vibrating diaphragm. According to the invention, the first magnetic circuit system and the second magnetic circuit system are arranged, and the magnetic conduction vibrating diaphragm is arranged between the first magnetic circuit system and the second magnetic circuit system, when the first magnetic circuit system and the second magnetic circuit system generate an alternating electromagnetic field, the magnetic conduction vibrating diaphragm vibrates, and the convex vibration enhancement part is arranged on the magnetic conduction vibrating diaphragm, so that the rigidity of a diaphragm vibration area on the magnetic conduction vibrating diaphragm is enhanced, the vibration frequency is further improved, the high-frequency performance of the loudspeaker in the use process is greatly improved, and the high-frequency use requirement of a user is met.

Description

Electret loudspeaker

Technical Field

The invention belongs to the technical field of loudspeakers, and particularly relates to an electret loudspeaker.

Background

The loudspeaker is an indispensable part in a commonly used earphone and has the function of converting an electric signal into sound, the loudspeaker is also called a loudspeaker, high-frequency loudspeakers on the market are various, for example, the invention patent with the application number of CN202110142880.6 discloses a sounding monomer, the sounding monomer comprises a shell with an accommodating space, a magnetic conduction vibrating diaphragm arranged in the accommodating space and two magnetic circuit systems, the two magnetic circuit systems are oppositely arranged at intervals, and each magnetic circuit system comprises magnetic steel attached to the shell and a coil arranged around the magnetic steel; the magnetic conduction vibrating diaphragm is arranged between the two magnetic circuit systems and is respectively arranged at intervals with the two magnetic circuit systems, the magnetic conduction vibrating diaphragm is used for vibrating and sounding under the action of an alternating electromagnetic field generated by the magnetic circuit systems, and the magnetic steel, the coil and the magnetic conduction vibrating diaphragm are coaxially arranged.

Although the technical scheme of the horn in the above patent can improve the electro-acoustic conversion efficiency, the structure of the horn is limited, and the technical problem of poor high-frequency performance still exists, so that the problem of influencing the use of users is caused.

Disclosure of Invention

The invention aims to provide an electret horn, and aims to solve the technical problem that the use of the horn is influenced due to poor high-frequency performance in the prior art.

In order to achieve the above object, an embodiment of the present invention provides an electret speaker, which includes a housing, a first magnetic circuit system, a second magnetic circuit system, a holding cavity, a magnetic conductive diaphragm, a vibration enhancing portion, and a magnetic coupling structure, wherein the housing is provided with the holding cavity, the first magnetic circuit system is disposed at the bottom of the holding cavity, the second magnetic circuit system is disposed in the holding cavity, the second magnetic circuit system is located above the first magnetic circuit system, the vibration enhancing portion is disposed between the first magnetic circuit system and the second magnetic circuit system, and the magnetic conductive diaphragm is provided with the raised vibration enhancing portion.

Optionally, the vibration enhancing portion is disposed at a center of the magnetically permeable diaphragm.

Optionally, the vibration enhancing portion is provided in a convex shape, and a convex end of the vibration enhancing portion faces the first magnetic circuit system.

Optionally, the vibration enhancing portion is provided in a convex shape, and a convex end of the vibration enhancing portion faces the second magnetic circuit system.

Optionally, the number of the vibration reinforcement portions is plural.

Optionally, the vibration enhancing portion is disposed outside a center of the magnetically permeable diaphragm.

Optionally, the number of the magnetic conductive diaphragms is multiple, and the magnetic conductive diaphragms are sequentially stacked.

Optionally, the first magnetic circuit system includes a first magnet, a first magnetic conductive ring and a first voice coil, the first magnet is installed at the bottom of the installation cavity, the first magnetic conductive ring is installed on the first magnet, the first magnetic conductive ring is further connected with the lower end face of the magnetic conductive diaphragm, and the first voice coil is sleeved in a ring surrounded by the first magnet.

Optionally, the second magnetic circuit system includes a second magnetic conductive ring, a second magnet, and a second voice coil, the second magnetic conductive ring is installed in the accommodating cavity and connected to the upper end surface of the magnetic conductive diaphragm, the second magnet is installed on the second magnetic conductive ring, and the second voice coil is sleeved in the second magnet.

Optionally, the electret horn further comprises a PCBA plate, the PCBA plate being electrically connected with both the first voice coil and the second voice coil.

One or more technical solutions in the electret horn provided by the embodiment of the present invention have at least one of the following technical effects:

1. according to the invention, the first magnetic circuit system and the second magnetic circuit system are arranged, and the magnetic conduction vibrating diaphragm is arranged between the first magnetic circuit system and the second magnetic circuit system, when the first magnetic circuit system and the second magnetic circuit system generate an alternating electromagnetic field, the magnetic conduction vibrating diaphragm vibrates, and the convex vibration enhancement part is arranged on the magnetic conduction vibrating diaphragm, so that the rigidity of a diaphragm vibration area on the magnetic conduction vibrating diaphragm is enhanced, the vibration frequency is further improved, the high-frequency performance of the loudspeaker in the use process is greatly improved, and the high-frequency use requirement of a user is met.

2. According to the invention, the vibration enhancing part is arranged at the central position of the magnetic-conductive vibrating diaphragm, the first voice coil is sleeved in the ring surrounded by the first magnet, and the second voice coil is sleeved in the ring of the second magnet, so that the distances between the first voice coil and the vibration enhancing part and the distances between the second voice coil and the vibration enhancing part are as close as possible, and further, when the first voice coil and the second voice coil are electrified to enable the first magnetic circuit system and the second magnetic circuit system to generate an alternating electromagnetic field, the acting force generated by the alternating magnetic field is applied to the vibration enhancing part on the magnetic-conductive vibrating diaphragm on the basis of the distance as close as possible, namely the central position of the magnetic-conductive vibrating diaphragm, so that the high-frequency vibration with low amplitude is realized, the high-frequency performance is greatly improved, and the use requirements of users are met.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic view of an overall structure of an electret horn according to an embodiment of the present invention;

fig. 2 is a top view of an electret horn according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;

fig. 5 is a comparison graph of graphs generated by an electret horn provided in an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

100. a housing; 110. an accommodating cavity; 200. a first magnetic circuit system; 210. a first magnet; 220. a first magnetically conductive ring; 230. a first voice coil; 300. a second magnetic circuit system; 310. a second magnetically conductive ring; 320. a second magnet; 330. a second voice coil; 400. a magnetic-conductive vibrating diaphragm; 410. a vibration enhancing section; 500. PCBA board.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 4, an electret horn is provided, which includes a casing 100, a first magnetic circuit system 200 and a second magnetic circuit system 300, wherein a receiving cavity 110 is disposed in the casing 100, the first magnetic circuit system 200 is disposed at the bottom of the receiving cavity 110, the second magnetic circuit system 300 is disposed in the receiving cavity 110, and the second magnetic circuit system 300 is located above the first magnetic circuit system 200.

The electret horn further comprises a magnetic conductive diaphragm 400, the magnetic conductive diaphragm 400 is arranged between the first magnetic circuit system 200 and the second magnetic circuit system 300, and a convex vibration enhancing portion 410 is arranged on the magnetic conductive diaphragm 400. Specifically, the magnetic conductive diaphragm 400 is configured to vibrate under the action of the alternating electromagnetic field generated by the first magnetic circuit 200 and the second magnetic circuit 300, so as to generate sound.

According to the invention, the first magnetic circuit system 200 and the second magnetic circuit system 300 are arranged, and the magnetic conductive diaphragm 400 is arranged between the first magnetic circuit system 200 and the second magnetic circuit system 300, when the first magnetic circuit system 200 and the second magnetic circuit system 300 generate an alternating electromagnetic field, the magnetic conductive diaphragm 400 vibrates, and the convex vibration enhancement part 410 is arranged on the magnetic conductive diaphragm 400, so that the rigidity of a diaphragm vibration area on the magnetic conductive diaphragm 400 is enhanced, the vibration frequency is further improved, the high-frequency performance of the loudspeaker in the use process is greatly improved, and the high-frequency use requirement of a user is met.

Furthermore, after the electret horn disclosed by the invention is placed in the earphone unit, the sound color, the space sense and the metal sense of the earphone unit are increased, and the details of high pitch are greatly enriched.

In another embodiment of the present invention, as shown in fig. 3 to 4, the vibration enhancing portion 410 is disposed at a center position of the magnetically permeable diaphragm 400. Specifically, in this embodiment, the vibration enhancing portion 410 is disposed at the center of the magnetic conductive diaphragm 400, so that the vibration enhancing portion 410 at the center is implemented to implement high-frequency vibration, thereby improving the high-frequency performance of the speaker.

In another embodiment of the present invention, as shown in fig. 1-2, the vibration enhancing portion 410 is provided in a convex shape, and the convex end of the vibration enhancing portion 410 faces the first magnetic circuit system 200. Specifically, by disposing the protruding end of the vibration enhancing portion 410 toward the first magnetic circuit system 200, the directional vibration of the vibration in the accommodating chamber 110 is realized.

Alternatively, in another embodiment of the present invention, the vibration enhancing portion 410 is provided in a convex shape, and a convex end of the vibration enhancing portion 410 faces the second magnetic circuit system 300. Similarly, when the protruding end of the vibration enhancing portion 410 is disposed toward the second magnetic circuit system 300, high-frequency vibration can be achieved, and high-frequency performance can be greatly improved.

In another embodiment of the present invention, the vibration reinforcement part 410 is plural in number. Specifically, by providing a plurality of vibration enhancement portions 410, multipoint high-frequency vibration is realized on the magnetic conductive diaphragm 400, and simultaneously, each vibration enhancement portion 410 realizes synchronous vibration along with the duration of vibration time, so as to realize synchronous resonance, further improve the vibration frequency, and realize the great improvement of high-frequency performance.

In another embodiment of the present invention, the vibration enhancing portion 410 is disposed outside the center of the magnetically permeable diaphragm 400. Further, in this embodiment, by disposing the vibration enhancing portion 410 at the side of the magnetic conductive diaphragm 400, compared with the magnetic conductive diaphragm 400 with a flush surface in the prior art, the improvement of the high frequency performance can be achieved, and the use requirement of the user can be further satisfied.

In another embodiment of the present invention, the number of the magnetic conductive diaphragms 400 is multiple, and each of the magnetic conductive diaphragms 400 is sequentially stacked. Specifically, by providing a plurality of magnetic diaphragms 400, the plurality of magnetic diaphragms 400 vibrate simultaneously, so as to increase the vibration frequency and further increase the high-frequency performance.

In another embodiment of the present invention, as shown in fig. 3 to 4, the first magnetic circuit system 200 includes a first magnet 210, a first magnetic ring 220, and a first voice coil 230, the first magnet 210 is installed at the bottom of the installation cavity, the first magnetic ring 220 is installed on the first magnet 210, the first magnetic ring 220 is further connected to the lower end surface of the magnetic diaphragm 400, and the first voice coil 230 is sleeved in a ring surrounded by the first magnet 210. Specifically, the first magnetic ring 220 has a magnetic function, specifically, conducts the magnetism of the first magnet 210 to the side of the magnetic diaphragm 400. In this embodiment, the first voice coil 230 is further sleeved in the ring surrounded by the first magnet 210, and compared with the structure in which the magnet is surrounded by the voice coil in the prior art, the present invention can further transmit the interaction force between the magnetic field generated after the first voice coil 230 is electrically conducted and the magnetic field distributed at the magnetically conductive diaphragm 400 by the first magnet 210 and the first magnetically conductive ring 220 to the magnetically conductive diaphragm 400, thereby achieving a high-performance high-frequency effect.

In another embodiment of the present invention, as shown in fig. 3-4, the second magnetic circuit 300 includes a second magnetic ring 310, a second magnet 320, and a second voice coil 330, the second magnetic ring 310 is installed in the accommodating cavity 110 and connected to the upper end surface of the magnetically conductive diaphragm 400, the second magnet 320 is installed on the second magnetic ring 310, and the second voice coil 330 is sleeved in the ring of the second magnet 320. Specifically, the second magnetic ring 310, the first magnetic ring 220, the second magnet 320, the first magnet 210, the second voice coil 330, and the first voice coil 230 are arranged opposite to each other with the magnetic diaphragm 400 as a symmetry plane, so that the uniformity of magnetic field distribution is realized through the oppositely arranged structures, and the tone quality is improved. The first magnet 210 and the second magnet 320 have opposite polarities on opposite surfaces.

Further, in the present invention, the vibration enhancing portion 410 is disposed at the center of the magnetically conductive diaphragm 400, the first voice coil 230 is sleeved in the ring surrounded by the first magnet 210, and the second voice coil 330 is sleeved in the ring of the second magnet 320, so that the distances between the first voice coil 230 and the second voice coil 330 and the vibration enhancing portion 410 are as close as possible, and further, when the first voice coil 230 and the second voice coil 330 are energized to generate an alternating electromagnetic field in the first magnetic circuit 200 and the second magnetic circuit 300, the acting force generated by the alternating magnetic field is applied to the vibration enhancing portion of the magnetically conductive diaphragm 400, i.e., to the center of the magnetically conductive diaphragm 400, on the basis of the distance as close as possible, so as to realize a low-amplitude high-frequency vibration, compared to the structure in the prior art in which the voice coil is disposed at the outermost side and surrounds the first magnetically conductive ring 220 and the first magnet 210, according to the invention, the structure of the magnet and the voice coil which are opposite is arranged, so that the high-frequency performance is greatly improved, and the use requirements of users are met.

In another embodiment of the present invention, as shown in fig. 1-4, the electret horn further comprises a PCBA board 500, the PCBA board 500 being electrically connected to both the first voice coil 230 and the second voice coil 330. Specifically, the PCBA board 500 is configured to transmit an electrical signal to the first voice coil 230 and the second voice coil 330, so as to energize the first voice coil 230 and the second voice coil 330, so as to generate an alternating electromagnetic field in the first magnetic circuit 200 and the second magnetic circuit 300.

In another embodiment of the present invention, the housing 100 is integrally formed, and compared with the detachable housing 100, by providing the integral housing 100, on one hand, the stability of the overall structure of the product is improved, and on the other hand, the first magnetic circuit system 200, the second magnetic circuit system 300 and the magnetic conductive diaphragm 400 are all accommodated in the accommodating cavity 110 to protect the components, so that the assembling process is simple and fast, and the production efficiency is improved.

Further, as shown in fig. 5, compared with the planar magnetic diaphragm in the prior art, when the magnetic diaphragm 400 with the vibration enhancement portion 410 added thereto generates a sound curve, the specific effect is shown in fig. 5, the curve with the reference number 610 in fig. 5 is the sound curve generated by the planar magnetic diaphragm in the prior art, and the curve with the reference number 620 is the sound curve generated by the magnetic diaphragm 400 with the vibration enhancement portion 410 added thereto, the horizontal axis is frequency, and the vertical axis is decibel, so that the backward shift of the high frequency point and the improvement of decibel are realized, that is, the high frequency performance is realized, and the use requirements of the user are met.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an electret loudspeaker, includes casing, first magnetic circuit system and second magnetic circuit, be equipped with the holding chamber in the casing, first magnetic circuit set up in the bottom in holding chamber, second magnetic circuit set up in the holding intracavity, just second magnetic circuit is located first magnetic circuit top, its characterized in that still includes the magnetic conduction vibrating diaphragm, the magnetic conduction vibrating diaphragm set up in first magnetic circuit with between the second magnetic circuit, be equipped with the vibration reinforcing part that is protruding form on the magnetic conduction vibrating diaphragm.

2. The electret horn of claim 1, wherein the vibration-enhancing portion is disposed at a center of the magnetically permeable diaphragm.

3. The electret horn of claim 1, wherein the vibration enhancement portion is provided in a convex shape, and a convex end of the vibration enhancement portion faces the first magnetic circuit system.

4. The electret horn of claim 1, wherein the vibration enhancement portion is provided in a convex shape, and a convex end of the vibration enhancement portion faces the second magnetic circuit system.

5. The electret horn of claim 1, wherein the vibration enhancing portion is plural in number.

6. The electret horn of claim 1, wherein the vibration-enhancing portion is disposed outside a center of the magnetically permeable diaphragm.

7. The electret horn of any one of claims 1 to 6, wherein there are a plurality of magnetically conductive diaphragms, and each magnetically conductive diaphragm is sequentially stacked.

8. The electret horn of any one of claims 1 to 6, wherein the first magnetic circuit system comprises a first magnet, a first magnetic conductive ring and a first voice coil, the first magnet is mounted at the bottom of the mounting cavity, the first magnetic conductive ring is mounted on the first magnet, the first magnetic conductive ring is further connected with the lower end surface of the magnetic conductive diaphragm, and the first voice coil is sleeved in a ring surrounded by the first magnet.

9. The electret horn of claim 8, wherein the second magnetic circuit system comprises a second magnetic conductive ring, a second magnet and a second voice coil, the second magnetic conductive ring is installed in the accommodating cavity and connected to the upper end surface of the magnetic conductive diaphragm, the second magnet is installed on the second magnetic conductive ring, and the second voice coil is sleeved in the second magnet ring.

10. The electret horn of claim 9, further comprising a PCBA board electrically connected to both the first and second voice coils.