WO2021134244A1

WO2021134244A1 - Loudspeaker structure, and electronic device applying same

Info

Publication number: WO2021134244A1
Application number: PCT/CN2019/130014
Authority: WO
Inventors: 刘忠原; 蔡斌; 魏威
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-08

Abstract

The present utility model provides a loudspeaker structure, and an electronic device applying same. Provided is an electronic device, comprising a loudspeaker structure comprising a first cover body, a second cover body enclosed with the first cover body to form an accommodation space, and a loudspeaker unit accommodated in the accommodation space, wherein a vibration diaphragm is provided on one side of the loudspeaker unit, and is enclosed with the first cover body to form a front cavity; a sound outlet hole in communication with the front cavity is provided on one side of the first cover body; the first cover body comprises a front cavity wall facing the vibration diaphragm; and further comprising a soft glue provided on the side of the front cavity wall close to the vibration diaphragm. The soft glue provided on the front cavity wall can have the cushioning function when the amplitude of the vibration diaphragm is abnormally large, the vibration diaphragm is prevented from impacting the front cavity wall, and noise is avoided. The loudspeaker structure of the solution can have the function of inhibiting the amplitude of the vibration diaphragm and protecting the loudspeaker structure, thereby improving the sound quality of the loudspeaker structure and prolonging the service life thereof.

Description

Loudspeaker structure and electronic equipment using the loudspeaker structure

Technical field

The utility model belongs to the technical field of sound generating devices, and particularly relates to a speaker structure and electronic equipment using the speaker structure.

Background technique

The speaker structure is an important acoustic component. It usually includes a housing with a housing space and a speaker unit contained in the housing space. The diaphragm of the speaker unit and one side of the housing form a front cavity. A sound hole communicating with the front cavity is opened on the upper side. In some products, the space reserved for the speaker structure is not large, so the volume of the front cavity needs to be reduced to save space, but the diaphragm needs to vibrate when the speaker structure is working, and the reduction in the volume of the front cavity reduces the vibration of the diaphragm In space, when the vibration amplitude of the diaphragm is too large, it is easy to hit the inner wall of the front cavity to produce noise, which affects the sound quality and service life of the speaker structure.

technical problem

The purpose of the utility model is to provide a loudspeaker structure and electronic equipment using the loudspeaker structure, which can suppress the vibration amplitude and protect the loudspeaker structure, thereby improving the sound quality and service life of the loudspeaker structure.

Technical solutions

The technical solution of the present invention is as follows: a speaker structure is provided, which includes a first cover body, a second cover body that is enclosed with the first cover body to form an accommodating space, and a speaker unit accommodated in the accommodating space. One side of the speaker unit has a diaphragm, the diaphragm and the first cover form a front cavity, and one side of the first cover is provided with a sound hole communicating with the front cavity. The first cover has a front cavity wall directly opposite to the diaphragm, and the speaker structure further includes a soft glue arranged on the front cavity wall close to the diaphragm.

Further, the diaphragm includes a dome in the middle, and the projection of the soft glue in a direction perpendicular to the dome at least partially overlaps the dome.

Further, the soft glue is provided at the two corners of the front cavity wall and the dome away from the sound hole directly opposite to each other.

Further, the four corners of the front cavity wall and the dome are provided with the soft glue.

Further, the soft glue adopts foam or sound-absorbing cotton.

Further, the first cover includes a main body connected with the second cover and a front cavity steel sheet fixed on the main body facing the diaphragm, and the main body is directly facing the diaphragm. An opening is opened at the diaphragm, and the front cavity steel sheet covers the opening.

Further, the side of the main body portion away from the speaker unit is recessed toward the direction of the speaker unit to form an assembly groove surrounding the opening, and the front cavity wall is a part of the front cavity steel sheet covering the opening The front cavity steel sheet further includes an assembling edge formed by bending and extending from the periphery of the front cavity wall toward the assembling groove and matching the assembling groove, and the assembling edge is fixed in the assembling groove.

Further, the sound hole is opened on one side of the main body, and the speaker structure further includes a mesh plate covering the sound hole and away from the front cavity end.

Further, an electronic device is provided, which includes the speaker structure as described in any one of the above.

Beneficial effect

The beneficial effects of the utility model are:

The soft glue set on the front cavity wall can play a buffering effect when the diaphragm amplitude is abnormally large, avoiding the diaphragm hitting the front cavity wall and avoiding noise. The speaker structure of this solution can suppress the diaphragm amplitude and protect the speaker The role of the structure, thereby improving the sound quality and service life of the speaker structure.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the speaker structure of the utility model;

Fig. 2 is a schematic cross-sectional view of the speaker structure in Fig. 1 along the A-A direction;

Figure 3 is a schematic diagram of a three-dimensional exploded structure of the speaker structure of the present invention;

4 is a schematic diagram of the relative position of the projection of the soft glue in the direction perpendicular to the top of the sphere in the present invention.

Embodiments of the present invention

The present utility model will be further explained below in conjunction with the drawings and embodiments.

Provided is an electronic device, including a speaker structure, wherein, as shown in FIGS. 1-4, the speaker structure includes a first cover 1, a second cover 2 that is enclosed with the first cover 1 to form a storage space, and is accommodated in the storage space Inside the speaker unit 3, one side of the speaker unit 3 has a diaphragm 31. The diaphragm 31 and the first cover 1 surround the front cavity 001. One side of the first cover 1 is provided with an outlet communicating with the front cavity 001. For the sound hole 111, the first cover 1 has a front cavity wall 121 directly opposite to the diaphragm 31, and the speaker structure further includes a soft glue 4 arranged on the front cavity wall 121 on the side close to the diaphragm 31.

The soft glue 4 provided on the front cavity wall 121 can play a buffering effect when the vibration of the diaphragm 31 is abnormally too large, to prevent the diaphragm 31 from hitting the front cavity wall 121, and prevent noise from appearing. The speaker structure of this solution can suppress vibration. The film 31 has the function of amplitude and protection of the speaker structure, thereby improving the sound quality and service life of the speaker structure.

The first cover 1 includes a main body 11 connected to the second cover 2 and a front cavity steel sheet 12 fixed to the main body 11 facing the diaphragm 31, and an opening 114 is opened on the main body 11 facing the diaphragm 31 The front cavity steel sheet 12 covers the opening 114, and the main body 11 is recessed toward the speaker unit 3 on the side away from the speaker unit 3 to form an assembly groove 113 surrounding the opening 114. The front cavity wall 121 is the front cavity steel sheet 12 covering the opening. In part 114, the front cavity steel sheet 12 further includes an assembly edge 122 that is formed by bending and extending from the periphery of the front cavity wall 121 toward the assembly groove 113 to match the assembly groove 113, and the assembly edge 122 is fixed in the assembly groove 113. Specifically, in this embodiment, the assembling edge 122 and the main body 11 are injection molded into one body, so that the assembling edge 122 and the body 11 are tightly connected. In other embodiments, the assembling edge 122 may be embedded in the assembling groove 113. It is fixed to the bottom of the assembly groove 113 by screws, and the assembly edge 122 can be fixed to the bottom of the assembly groove 113 by bonding, welding, etc. The arrangement of the assembly groove 113 can facilitate the positioning of the front cavity steel sheet 12 while ensuring the front cavity steel sheet 12 The firmness of the connection with the main body 11.

The diaphragm 31 includes a dome 311 in the middle, and the projection of the soft glue 4 in a direction perpendicular to the dome 311 at least partially overlaps the dome 311. Specifically, in order to achieve a cushioning effect on the diaphragm 31, soft glue 4 can be provided on the two corners of the front cavity wall 121 and the dome 311 away from the sound hole 111, or on the front cavity wall 121. The soft glue 4 is set directly opposite to the four corners of the dome 311. In other embodiments, the soft glue 4 can be arranged on the front cavity wall 121 directly opposite the edge of the dome 311, and the specific number of positions and edge positions can be adjusted according to the actual situation. For example, it can be placed on the front cavity wall 121 and the ball. One, two or three areas of soft glue 4 are evenly arranged on the top 311 away from the edge of the sound hole 111, or even on the four edges of the front cavity wall 121 and the dome 311. Set up one, two or three areas of soft glue4.

In this embodiment, the soft glue 4 uses glass glue, white latex glue, silica gel, etc. The thickness of the soft glue 4 is within 0.2mm-0.5mm, preferably 0.25mm, and its thickness can be specifically set according to actual conditions, such as 0.2mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, etc. The soft glue 4 is fluid before installation. After the soft glue 4 is set on the front cavity wall 121 to be solidified, it becomes an elastic solid state. Therefore, the diaphragm 31 can be buffered. By setting the soft glue 4, the height can be designed more The limit of the front cavity 001 vibration space, thereby reducing the height space occupied by the speaker structure.

The sound hole 111 is opened on one side of the main body 11, the speaker structure further includes a net plate covering the sound hole 111 away from the end of the front cavity 001, the sound hole 111 is provided with a support plate 112, the second cover 2 and the speaker The single body 3 encloses to form a rear cavity 002. The second cover 2 includes a cover 21 matingly connected with the main body 11 and a rear cavity steel sheet 22 that is integrally molded with the cover 21; the speaker structure also includes the main body 11 is an integral reinforcement sheet 6 by injection molding, thereby improving the strength of the first cover 1.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to the present utility model. New scope of protection.

Claims

A speaker structure includes a first cover body, a second cover body that is enclosed with the first cover body to form an accommodating space, and a speaker unit accommodated in the accommodating space, and one side of the speaker unit has a vibration The diaphragm and the first cover are enclosed to form a front cavity, and one side of the first cover is provided with a sound hole communicating with the front cavity, characterized in that the first cover has The front cavity wall directly opposite to the diaphragm, the speaker structure further includes a soft glue arranged on the front cavity wall on the side close to the diaphragm.
The speaker structure according to claim 1, wherein the diaphragm includes a dome in the middle, and the projection of the soft glue in a direction perpendicular to the dome at least partially overlaps the dome.
The loudspeaker structure according to claim 2, wherein the soft glue is provided at the two corners of the front cavity wall and the dome away from the sound hole directly opposite to each other.
The loudspeaker structure according to claim 2, wherein the soft glue is provided at the four corners of the front cavity wall and the dome directly opposite to each other.
The speaker structure according to claim 1, wherein the thickness of the soft glue is within 0.2mm-0.5mm.
The loudspeaker structure according to any one of claims 1-5, wherein the first cover includes a main body connected to the second cover and a main body fixed to the main body opposite to the For the front cavity steel sheet at the diaphragm, an opening is opened on the main body portion facing the diaphragm, and the front cavity steel sheet covers the opening.
The speaker structure according to claim 6, wherein a side of the main body away from the speaker unit is recessed toward the speaker unit to form an assembly groove surrounding the opening, and the front cavity wall In order for the front cavity steel sheet to cover the part of the opening, the front cavity steel sheet further includes an assembling edge formed by bending and extending from the periphery of the front cavity wall toward the assembling groove and matching the assembling groove, the assembling The edge is fixed in the assembling groove.
The speaker structure according to claim 6, wherein the sound hole is opened on one side of the main body, and the speaker structure further comprises an end that covers the sound hole and is away from the front cavity. Stencil.
An electronic device, characterized by comprising the speaker structure according to any one of claims 1-8.