WO2016086756A1

WO2016086756A1 - Miniature loudspeaker

Info

Publication number: WO2016086756A1
Application number: PCT/CN2015/094253
Authority: WO
Inventors: 葛连山; 董文强; 郭甜丽
Original assignee: 歌尔声学股份有限公司
Priority date: 2014-12-02
Filing date: 2015-11-11
Publication date: 2016-06-09
Also published as: CN104469633A

Abstract

Disclosed is a miniature loudspeaker, comprising a magnetic circuit system, a vibration system and a support system. The magnetic circuit system comprises a basin frame, and a magnet and a washer accommodated within the basin frame. The vibration system comprises a voice coil and a diaphragm. The support system comprises a front cover, and a casing matched and combined with the front cover, sound holes being symmetrically arranged on side walls of the casing. The basin frame comprises a base portion and side walls protruding along the vertical direction. The sound holes are located at positions directly facing the side walls of the basin frame. Gaps acting as sound outlet channels are provided between the side walls of the basin frame and the side walls of the casing, and sound waves are transmitted from the sound holes to the outside via the sound outlet channels. Via the arrangement of the sound holes on the side walls of the casing, a manufacturing process may be optimised, preventing the basin frame from being subject to side-pressing or perforation treatment and thereby ensuing product performance, as well as preventing an installation test curve from being affected.

Description

Micro speaker

Technical field

The present invention relates to the field of electroacoustics, and in particular to a microspeaker.

Background technique

Referring to FIG. 7, in the existing micro-speaker structure, since the sound hole 9' is often disposed on the bottom plane of the product, it is necessary to press or open the basin frame to leave space for the sound hole to be pasted. Air filter 10'. For micro-speakers, since the basin frame is part of the magnetic circuit system, when it is crimped or opened, it will affect the magnetic guiding process of the product, and the performance of the micro-speaker is slightly lost. In addition, since the micro-speaker is assembled with the whole machine, it is necessary to ensure that the bottom plane of the product is flush with the assembly surface of the terminal device, so the sound hole located at the bottom of the product is easily blocked, thereby affecting the installation test curve.

Therefore, it is necessary to improve the position design of the existing micro-speaker structure, especially the sound hole, to minimize the loss of product performance caused by the beading or opening of the basin, and to prevent the sound of the product from being assembled. The hole is blocked and affects the installed test curve.

Summary of the invention

The technical problem to be solved by the present invention is to provide a micro-speaker, in which the position of the sound hole is redesigned while the components remain unchanged, and sound holes are arranged on the side wall of the outer casing to avoid the structure of the basin frame. Pressing or opening treatment can reduce the loss of magnetic lines and ensure the magnetic properties of the product, while preventing the sound holes from being blocked during assembly.

In order to achieve the above object, the present invention adopts the following technical solutions: a micro-speaker including a magnetic circuit system, a vibration system and a support system; the magnetic circuit system includes a basin frame, a magnet housed in the basin frame, and a washer; The vibration system includes a voice coil and a diaphragm; the support system includes a front cover and a housing that is mated with the front cover, wherein a sound hole is symmetrically disposed on a sidewall of the outer casing; the base includes a base And a side wall projecting in a vertical direction; the sound hole being located at a position facing the side wall of the basin; A gap is reserved between the side wall of the basin frame and the side wall of the outer casing as an acoustic passage through which sound waves are transmitted to the outside.

As a modification, the end face of the sound hole is a sloped surface.

As an improvement, the side wall of the outer casing includes a long-axis side wall and a short-axis side wall; the sound hole is located on a long-axis side wall or a short-axis side wall of the outer casing.

As an improvement, the sound hole upper cover is provided with a damping; the damping is a rectangular structure, and the inclined surface is attached to the surface of the sound hole.

As an improvement, the intermediate position of the diaphragm is combined with a reinforcing portion; an inner edge of the diaphragm surrounds the outer circumference of the reinforcing portion.

As an improvement, the microspeaker further includes two electrical connectors that are fixedly coupled to both ends of the voice coil.

Compared with the prior art, in the present invention, the position of the sound hole is designed on the side wall of the outer casing, on the one hand, the thickness of the micro-speaker product is fully utilized, and the beading frame is not required to be crimped or opened, which can be improved. The magnetic properties of the product; on the other hand, the sound hole is located on the side wall of the outer casing, which can prevent impurities on the back of the product from entering the product through the sound hole, affecting subsequent listening and testing. When the micro-speaker is assembled with the terminal device such as mobile phone or computer, the sound hole disposed on the side of the outer casing will not be blocked, and will not affect the installation test curve of the product.

DRAWINGS

1 is a perspective exploded view of a microspeaker according to the present invention;

2 is a top plan view of a microspeaker according to the present invention;

Figure 3 is a bottom view of the microspeaker according to the present invention;

Figure 4 is a cross-sectional view of the microspeaker according to the present invention along the long axis of the casing;

Figure 5 is a cross-sectional view of the microspeaker according to the present invention along the short axis of the casing;

FIG. 6 is a schematic view showing the assembly of the micro-speaker simulation machine according to the present invention.

Figure 7 is a schematic view showing the assembly of a conventional micro-speaker;

The reference numerals include: 1, basin frame, 2, magnet, 3, washer, 4, voice coil, 5, diaphragm, 6, reinforcement, 7, front cover, 8, housing, 9, sound hole , 9' sound hole, 10, damping, 10', dust net, 11, Electrical connector, 12, voice coil lead, 13, magnetic circuit system, 14, vibration system, 15, the whole machine assembly plate, AA', sound channel.

detailed description

The content of the present invention will be described in detail below with reference to the accompanying drawings:

Example:

As shown in FIG. 1, the microspeaker of the present invention comprises a magnetic circuit system 13, a vibration system 14 and a support system. The magnetic circuit system 13 includes a basin frame 1, a magnet 2 and a washer 3 housed in the basin frame 1; the vibration system 14 includes a voice coil 4 and a diaphragm 5; the support system comprises a front cover 7 and a housing 8 mated with the front cover 7, wherein the side wall of the outer casing 8 is symmetrically provided with an acoustic hole 9; the base frame 1 comprises a base and protrudes in a vertical direction The side wall; the sound hole 9 is located at a position facing the side wall of the basin frame 1.

As shown in FIG. 5 and FIG. 6, when the basin frame 1 is fixed to the outer casing 8, a certain distance is set between the side wall of the basin frame 1 facing the sound hole 9 and the side wall of the outer casing 8, and a space is reserved as a The sound channel AA', when the diaphragm 5 vibrates, the sound wave can be transmitted from the sound hole 9 to the outside through the sound channel AA', thereby inducing the air to sound.

For the micro-speaker, by providing the sound hole 9 on the side wall of the outer casing 8 by the above technical solution, not only the damage of the product performance caused by the beading or opening treatment of the basin frame 1 is avoided, but also the design Make full use of the thickness advantage of the micro-speaker products, the process technology is relatively simple, and the work efficiency of the process can be improved. At the same time, the sound hole 9 is located on the side wall of the outer casing 8, which can prevent impurities on the back of the product from entering the product through the sound hole 9, which affects the performance and use of the product.

As shown in Fig. 6, 15 is a mounting plate equipped with a micro-speaker and a terminal. The position of the sound hole 9 is not flush with the assembly surface. After assembly, the sound hole 9 is not blocked, and thus does not affect the installation test curve of the product. .

As shown in FIG. 5 and FIG. 6, the end surface of the sound hole 9 is a sloped surface, which allows the external space to be larger, so that the gas is more smooth; in addition, when the micro-speaker and the terminal device are assembled in the whole machine, if the side of the product is The terminal assembly is also relatively rigid, and the end surface of the sound hole 9 is designed as a slope, and it is also possible to prevent the sound hole 9 from being blocked by the mounting surface on the side of the casing 8.

As shown in FIG. 1, the side wall of the outer casing 8 includes a long-axis side wall and a short-axis side wall; the sound hole 9 is located on the long-axis side wall or the short-axis side wall of the outer casing 8.

As shown in FIG. 5 and FIG. 6, the sound hole 9 is provided with a damping 10 on the upper cover, and the damping 10 has a rectangular structure, and is inclined to the surface of the sound hole 9. The damping 10 is used to adjust the acoustic performance and is dust-proof. In the case of the specific description, the damping 10 is not limited to the above-described rectangular structure, and may be other shapes as long as it can be preferably attached to the surface of the sound hole 9.

As shown in FIG. 5, the intermediate portion of the diaphragm 5 is combined with a reinforcing portion 6; the inner edge of the diaphragm 5 surrounds the outer periphery of the reinforcing portion 6; the reinforcing portion 6 is generally preferably a rigid composite layer structure, mainly used for Enhance the performance of the product at high frequencies.

As shown in FIG. 1, the microspeaker further includes two electrical connectors 11 connected to both ends of the voice coil 4 (ie, the voice coil lead 12) for connecting the voice coil 4 to an external circuit, in particular The voice coil lead 12 is electrically connected to the electrical connector 11, and the electrical connector 11 is electrically connected to the external circuit of the microspeaker, so that the current signal of the external circuit can be transmitted to the inside, when the voice coil 4 receives the external circuit. When the current signal is used, the movement of the magnetic line of reciprocating cutting can be performed under the force of the electromagnetic field, thereby driving the diaphragm 5 to vibrate. The electrical connector 11 shown in this embodiment is a spring piece.

The above is only the embodiment of the present invention, and is not intended to limit the present invention, and equivalent modifications or variations made by those skilled in the art in light of the present invention are included in the scope of the claims.

Claims

A microspeaker includes a magnetic circuit system, a vibration system and a support system; the magnetic circuit system includes a basin frame, a magnet and a washer housed in the basin frame; the vibration system includes a voice coil and a diaphragm; The support system includes a front cover and a housing matched with the front cover, wherein: a sound hole is symmetrically disposed on a sidewall of the outer casing; the basin frame includes a base and a side wall protruding in a vertical direction; The sound hole is located at a position facing the side wall of the basin; a gap is reserved between the side wall of the basin frame and the side wall of the outer casing as an sound passage through which sound waves pass from the sound path The hole is transmitted to the outside world.
The microspeaker according to claim 1, wherein an end surface of said sound hole is a sloped surface.
The microspeaker according to claim 1, wherein the side wall of the outer casing comprises a long-axis side wall and a short-axis side wall; and the sound hole is located on a long-axis side wall or a short-axis side wall of the outer casing .
The microspeaker according to claim 2, wherein the sound hole upper cover is provided with a damping; the damping is a rectangular structure, and the inclined surface is attached to the surface of the sound hole.
The microspeaker according to claim 1, wherein an intermediate portion of the diaphragm is coupled with a reinforcing portion; an inner edge of the diaphragm surrounds an outer circumference of the reinforcing portion.
The microspeaker according to claim 1, further comprising two electrical connectors that are fixedly coupled to both ends of the voice coil.