CN114900777A

CN114900777A - Flat horn

Info

Publication number: CN114900777A
Application number: CN202210501890.9A
Authority: CN
Inventors: 余德权
Original assignee: Dongguan Yutai Electronics Co ltd
Current assignee: Dongguan Yutai Electronics Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-12

Abstract

The invention discloses a flat horn, comprising: the upper magnetic assembly comprises an upper shell and an upper magnet, an upper accommodating cavity with a downward opening is formed in the upper shell, and the upper magnet is accommodated in the upper accommodating cavity; the lower magnetic assembly comprises a lower shell, a first side magnet, a center magnet and a second side magnet, wherein the lower shell is internally provided with a lower accommodating cavity with an upward opening, and the first side magnet, the center magnet and the second side magnet are sequentially arranged in parallel and accommodated in the lower accommodating cavity; the coil is arranged between the upper magnetic assembly and the lower magnetic assembly; the diaphragm assembly comprises a diaphragm support, a diaphragm and a diaphragm ball top, the diaphragm support is fixed on the inner wall of the upper shell or the lower shell, the diaphragm is borne on the diaphragm support, and the diaphragm ball top is arranged on the diaphragm. The invention is a small-volume flat horn which well utilizes the principle of a moving coil, has excellent sound pressure level output of full frequency band and also has a balanced armature horn.

Description

Flat horn

Technical Field

The invention relates to the technical field of in-ear electroacoustic products, in particular to a small-volume flat horn which well utilizes the principle of a moving coil, has excellent sound pressure level output of a full frequency band and simultaneously has a balanced armature horn.

Background

Conventional miniature acoustic horns are largely classified into two types: moving coil horns and balanced armature horns. The moving-coil loudspeaker mainly changes the current direction in the coil through an alternating current signal, so that the coil reciprocates in a permanent magnetic field, and the vibrating diaphragm is pushed to make a sound. The balance armature type horn magnetizes the armature through the fixed coil, so that the armature vibrates in a reciprocating manner in the permanent magnetic field, and the vibrating diaphragm is pushed to make a sound. Two kinds of loudspeaker each have the advantage: the moving-coil loudspeaker has high sound pressure level in a low-frequency band, is suitable for music earphones, and has larger volume; the balanced armature speaker has a relatively high sound pressure level at medium and high frequencies, is smaller in volume by 60% than a moving coil receiver of the same output level, and has a much lower sound pressure level than a low-frequency output, and therefore is more suitable for use in hearing aid devices and in-ear hearing devices.

Therefore, the aim is to design a novel miniature flat horn, which can utilize the principle of a moving coil, has excellent sound pressure level output of a full frequency band and has small volume of a balanced armature horn.

Disclosure of Invention

The invention aims to provide a small-sized flat horn which well utilizes the principle of a moving coil, has excellent sound pressure level output of a full frequency band and simultaneously has a balanced armature horn.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: provided is a flat plate horn including:

the upper magnetic assembly comprises an upper shell and an upper magnet, an upper accommodating cavity with a downward opening is formed in the upper shell, and the upper magnet is accommodated in the upper accommodating cavity;

the lower magnetic assembly comprises a lower shell, a first side magnet, a center magnet and a second side magnet, wherein a lower accommodating cavity with an upward opening is formed in the lower shell, and the first side magnet, the center magnet and the second side magnet are sequentially accommodated in the lower accommodating cavity in a parallel arrangement manner;

the coil is arranged between the upper magnetic assembly and the lower magnetic assembly;

the diaphragm assembly comprises a diaphragm support, a diaphragm and a diaphragm ball top, wherein the diaphragm support is fixed on the inner wall of the upper shell or the lower shell, the diaphragm is borne on the diaphragm support, and the diaphragm ball top is arranged on the diaphragm.

And a circle of arch structure is formed on the vibrating diaphragm.

Still include the input end plate, the input end plate is sheet structure, and locates the outside of epitheca or inferior valve.

The vibrating diaphragm support with the vibrating diaphragm passes through glue bonding together, the vibrating diaphragm ball top with the vibrating diaphragm passes through glue bonding together.

The upper magnet is bonded inside the upper shell through glue.

The invention relates to a novel design based on a moving-coil loudspeaker, wherein a coil of the traditional moving-coil loudspeaker needs to be coaxial with a magnet, the coil is sleeved on the magnet, or the magnet is sleeved on the coil, and one loudspeaker only comprises one magnet.

The flat horn design of the invention splits the traditional moving coil magnetic circuit into an upper part and a lower part: the magnetic field generator comprises an upper magnetic circuit and a lower magnetic circuit which are 4 magnets in total, a coil is arranged between the upper magnetic circuit and the lower magnetic circuit, and an alternating magnetic field is generated by the coil by introducing an alternating current signal to the coil, so that the coil can reciprocate in a permanent magnetic field formed by the upper magnetic circuit and the lower magnetic circuit. The movement of the coil can drive the diaphragm to move, thereby generating sound.

The advantages of the design of the present invention are: the volume of the horn can be greatly reduced, so that the horn can have the volume of a balanced armature horn and also has high sound pressure level output.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

Fig. 1 is an exploded view of one embodiment of the flat panel horn of the present invention.

Fig. 2 is a cross-sectional view of one embodiment of the flat-panel horn of the present invention.

Fig. 3 is a schematic diagram of an embodiment of the arrangement of the flat horn magnets of the present invention.

Fig. 4 is a schematic view showing another embodiment of the arrangement of the flat horn magnet of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Hereinafter, if the terms "including", "having", and their derivatives are used in various embodiments of the present invention, they are intended to indicate only specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be understood as first excluding the existence of or adding to one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

Furthermore, to the extent that the present disclosure is directed to the terms "first," "second," "third," etc., this is used merely to distinguish one element from another, and is not intended to indicate or imply relative importance.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.

Referring to fig. 1 and 2, a flat plate speaker 100 according to an embodiment of the present invention includes:

the upper magnetic assembly comprises an upper shell 1 and an upper magnet 2, an upper accommodating cavity with a downward opening is formed in the upper shell 1, and the upper magnet 1 is accommodated in the upper accommodating cavity;

the lower magnetic assembly comprises a lower shell 10, a first side magnet 7, a center magnet 8 and a second side magnet 9, wherein a lower accommodating cavity with an upward opening is formed in the lower shell 10, and the first side magnet 7, the center magnet 8 and the second side magnet 9 are sequentially arranged in parallel and accommodated in the lower accommodating cavity;

the coil 6 is arranged between the upper magnetic assembly and the lower magnetic assembly;

the diaphragm assembly, the diaphragm assembly includes vibrating diaphragm support 5, vibrating diaphragm 4 and vibrating diaphragm ball top 3, vibrating diaphragm support 5 is fixed in the inner wall of epitheca 1 or inferior valve 10, vibrating diaphragm 4 bear in on the vibrating diaphragm support 5, vibrating diaphragm ball top 3 is located on the vibrating diaphragm 4.

Referring to fig. 1, the diaphragm 4 is formed with a ring-shaped dome structure 41.

A ring-shaped arch structure 41 is formed on the diaphragm 4, and the ring-shaped arch structure 41 can be used as an extension required by vibration, specifically, the arch structure 41 can be called a bending ring of the diaphragm, or a track, and is used for providing a sufficient up-and-down amplitude space when the diaphragm 4 is in motion, and if the arch structure 41 is not provided, the diaphragm 4 has almost no amplitude.

In one embodiment, referring to fig. 1 and 2, the gas-liquid separator further comprises an input end plate 11, wherein the input end plate 11 is of a sheet structure and is arranged on the outer side of the upper shell or the lower shell. The input end plate 11 is electrically connected to the coil 6.

In one embodiment, referring to fig. 1 and 2, the diaphragm support 5 and the diaphragm are bonded together by glue, and the diaphragm dome 3 and the diaphragm are bonded together by glue.

The vibrating diaphragm dome 3 can be made of a polymer composite material, a metal material or paper.

It should be noted that, when different materials are used for the diaphragm dome 3, different sound listening feelings can be caused. Metal materials can provide better high frequency sound extension, and biomaterials (such as PEEK materials and wool paper) can make sound more pliable, and various materials have respective characteristics. Can be selected according to the actual design requirements.

In one embodiment, the upper magnet 2 is adhered to the inside of the upper case 1 by glue.

In one embodiment, referring to fig. 3, in the upper magnet assembly, the N-pole of the upper magnet 2 faces upward, and the S-pole faces downward; in the lower magnet assembly, the first side magnet 7, the center magnet 8, and the second side magnet 9 are arranged such that the south pole of the first side magnet 7 faces upward, the north pole of the first side magnet faces downward, the north pole of the center magnet 8 faces upward and the south pole of the first side magnet faces downward, and the south pole of the second side magnet 9 faces upward and the north pole of the second side magnet faces downward.

In one embodiment, referring to fig. 4, in the upper magnetic assembly, the S pole of the upper magnet 2 faces upward, and the N pole faces downward; in the lower magnet assembly, the first side magnet 7, the center magnet 8, and the second side magnet 9 are arranged such that the N-pole of the first side magnet 7 faces upward, the S-pole faces downward, the S-pole of the center magnet 8 faces upward, and the N-pole of the second side magnet 9 faces downward.

The advantages of the design of the invention are: the volume of the horn can be greatly reduced, so that the horn can have the volume of a balanced armature horn and also has high sound pressure level output.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A flat panel horn, comprising:

2. The flat panel loudspeaker of claim 1, wherein the diaphragm is formed with a ring-shaped dome structure.

3. The flat panel horn of claim 1, further comprising an input terminal plate having a plate-like structure and provided outside the upper case or the lower case.

4. The flat panel loudspeaker of claim 1, wherein the diaphragm support and the diaphragm are bonded together by glue, and wherein the diaphragm dome and the diaphragm are bonded together by glue.

5. The flat plate loudspeaker of claim 1, wherein said upper magnet is bonded to the inside of said upper shell by glue.