WO2016101722A1

WO2016101722A1 - Micro loudspeaker

Info

Publication number: WO2016101722A1
Application number: PCT/CN2015/094271
Authority: WO
Inventors: 韩丹; 杨赟; 孙志军; 李振军; 范双双
Original assignee: 歌尔声学股份有限公司
Priority date: 2014-12-24
Filing date: 2015-11-11
Publication date: 2016-06-30
Also published as: CN104581564A

Abstract

Disclosed is a micro loudspeaker, which comprises a vibrating diaphragm and a housing. The vibrating diaphragm comprises a spherical top part and a folding ring part, and the vibrating diaphragm is supported and fastened through the housing. A joint part is disposed at the part, in connection to the housing, of the edge of the vibrating diaphragm. The joint part of the vibrating diaphragm is adhered and fastened to the housing through an adhesive layer, and the joint part of the vibrating diaphragm is joined with the bonding surface of the upper surface of the housing. An adhesive overflow groove for accommodating excessive adhesive is disposed at the outer edge of the bonding surface, and the adhesive overflow groove is partially covered by the outer edge of the joint part of the vibrating diaphragm. According to the micro loudspeaker of the present invention, by disposing the adhesive overflow groove on the bonding surface for adhering the vibrating diaphragm and the housing, excessive adhesive generated in the fastening process of the vibrating diaphragm can be fully absorbed, the problems that the periphery of the vibrating diaphragm cannot be fastened and a magnetic circuit system is damaged due to uneven applying of the adhesive are avoided, and the normal flow direction of the adhesive can be ensured and the adhesive is prevented from flowing upwards, so that the fastening of the vibrating diaphragm can be better completed and the performance of the micro loudspeaker is guaranteed.

Description

Micro speaker

Technical field

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

Background technique

In the structure of a conventional microspeaker, a diaphragm which is one of the components of the vibration system is usually bonded and fixed to a casing as a support system. However, in the specific fixing process, uneven coating is often caused, and the overflow rubber is one of its performances. In this case, the outer ring of the diaphragm will be jacked up due to too much glue, which is not good. It is fixed to the outer casing, and at the same time, the performance of the micro-speaker is affected because the overflow glue may drip along the outer circumference of the rubber coating layer in the magnetic circuit or other structure of the speaker.

Therefore, it is necessary to improve the structure of the existing micro-speaker, especially the process of bonding and fixing the diaphragm, and properly dispose of the overflow glue to avoid adversely affecting the fixing of the diaphragm itself and the performance of the speaker.

Summary of the invention

The technical problem to be solved by the present invention is to provide a micro-speaker, which is focused on improving the bonding and fixing process of the speaker diaphragm under the condition that the other components remain unchanged, and is disposed on the bonding surface of the diaphragm and the outer casing. The glue tank can be used to accommodate the overflow glue generated during the rubber coating process, and it is prevented from accumulating on the outer circumference of the diaphragm or flowing the glue layer to the magnetic circuit structure to affect the performance of the speaker.

In order to achieve the above object, the present invention adopts the following technical solution: a microspeaker comprising a diaphragm and a casing, wherein the diaphragm comprises a ball top and a loop portion; the diaphragm is supported and fixed by the casing; a portion of the edge of the diaphragm connected to the outer casing is provided with a joint portion; a joint portion of the diaphragm is fixed to the outer shell by a glue layer; and the joint of the diaphragm joint with the upper surface of the outer shell The outer edge of the bonding surface is provided with an overflow groove for containing the overflow glue; the outer edge of the diaphragm joint partially covers the overflow groove.

As an improvement, the outer casing has a stepped structure including a first horizontal plane and a second horizontal plane; the first horizontal plane is higher than the second horizontal plane; the bonding surface is located on the second horizontal plane; The portion of the first horizontal plane combined with the second horizontal plane has a downwardly concave surface that accommodates the overflow tank.

As an improvement, the first horizontal surface of the outer casing forms a retaining wall, and the overflowing groove and the rubber layer are located at a space formed by the joint of the first horizontal plane, the second horizontal plane and the diaphragm within.

As an improvement, the diaphragm and the outer casing are both rectangular structures.

As a refinement, the ball top and the loop portion are bonded to a rigid composite layer on the top side of the ball.

Compared with the prior art, in the present invention, an overflow groove is arranged on the outer edge of the bonding surface of the diaphragm and the outer casing, which can fully absorb the overflow glue generated during the fixing process of the diaphragm, and solve the problem caused by overflowing glue in the traditional structural design. The problem that the outer circumference of the diaphragm is jacked up and cannot be well fixed, and the overflow of the glue to the magnetic circuit or other structures can be prevented, thereby ensuring the performance of the microspeaker. In addition, the outer edge of the diaphragm joint portion is partially covered by the overflow tank, which can ensure the normal flow direction of the glue coating, and can also avoid the upward movement of the glue due to the complete overflow of the glue tank, thereby completing the diaphragm better. fixed.

DRAWINGS

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

2 is a schematic view showing the connection of a diaphragm and a casing according to the present invention;

Fig. 3 is a perspective view showing the structure of the overflow tank according to the present invention.

detailed description

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

Example:

Referring to Figures 1-3, the micro-speaker of the present invention comprises a diaphragm 1 and a casing 10, and a diaphragm 1 package The ball top 2 and the loop portion 3 are included; the diaphragm 1 is supported and fixed by the outer casing 10, wherein a portion of the edge of the diaphragm 1 that is connected to the outer casing 10 is provided with a joint portion 5; the joint portion 5 of the diaphragm 1 and the outer casing 10 pass through the glue The layer 6 is bonded and fixed; the diaphragm joint portion 5 is combined with the bonding surface of the upper surface of the outer casing 10; the outer edge of the bonding surface is provided with a glue overflow groove 7 for containing the overflow glue; the outer edge of the diaphragm joint portion 5 will overflow The glue tank 7 is partially covered.

Through the above technical solution, the outer side edge of the bonding surface of the micro-speaker diaphragm 1 and the outer casing 10 is provided with an overflow tank 7 to provide an indwelling space for the overflow glue generated during the fixing process of the diaphragm 1 , which can be avoided compared with the prior art. The uneven coating of the diaphragm causes the outer periphery of the diaphragm 1 to rise, and it can prevent the overflow of the glue from flowing along the glue layer to the magnetic circuit or other structure in the microspeaker, thereby further ensuring the performance of the microspeaker. In a specific implementation process, the outer edge of the diaphragm joint portion 5 partially covers the overflow tank 7 on the one hand to ensure the normal flow direction of the glue in the glue layer 6, and on the other hand, the overflow stored in the glue tank 7 When there is too much glue, it can be avoided that the glue is moved on the water because it is completely covered.

As shown in FIG. 3, the outer casing 10 has a stepped structure including a first horizontal plane 8 and a second horizontal plane 9; the first horizontal plane 8 is higher than the second horizontal plane 9; the bonding surface is located on the second horizontal plane 9; the first horizontal plane 8 is The combined portion of the second horizontal surface 9 has a downwardly concave surface to accommodate the overflow tank 7. The stepped structure design can prevent the glue layer from overflowing to one side on the one hand, and protect the diaphragm 1 bonded thereto from being crushed or damaged by external force on the other hand.

As shown in FIG. 3, the first horizontal plane 8 of the outer casing 10 forms a retaining wall, and the overflow tank 7 and the rubber layer 6 are located within a space formed by the first horizontal plane 8, the second horizontal plane 9, and the diaphragm joint portion 5.

In addition, in the present embodiment, the diaphragm 1 and the outer casing 10 have a rectangular structure.

As shown in Fig. 2, the ball top 2 and the loop portion 3 are joined to the rigid composite layer on the side of the ball top 2.

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 comprising a diaphragm and a casing, characterized in that: the diaphragm comprises a ball top and a loop portion; the diaphragm is supported and fixed by the outer casing; and the diaphragm edge is connected to the outer casing a portion is provided with a joint portion; the joint portion of the diaphragm is fixed to the outer shell by a glue layer; the diaphragm joint portion is combined with the adhesive surface of the upper surface of the outer shell; the outer side of the adhesive surface The edge is provided with an overflow tank containing the overflow glue; the outer edge of the diaphragm joint partially covers the overflow tank.
The microspeaker according to claim 1, wherein said outer casing has a stepped structure including a first horizontal plane and a second horizontal plane; said first horizontal plane being higher than said second horizontal plane; said bonding surface being located The second horizontal surface; the portion of the first horizontal plane combined with the second horizontal surface has a downward concave surface to accommodate the overflow tank.
The microspeaker according to claim 2, wherein the first horizontal surface of the outer casing forms a retaining wall, and the overflow tank is combined with the rubber layer at the first horizontal plane, the second horizontal plane, and the diaphragm. Within the space formed by the Ministry.
The microspeaker according to claim 1, wherein the diaphragm and the outer casing are both rectangular structures.
The microspeaker according to claim 1, wherein said top of said ball and said folded portion are joined to a rigid composite layer on the side of said top of said ball.