WO2018145414A1

WO2018145414A1 - Vibration system in sound production device and sound production device

Info

Publication number: WO2018145414A1
Application number: PCT/CN2017/094749
Authority: WO
Inventors: 王琪忠; 吴德跃; 刘光磊
Original assignee: 歌尔股份有限公司
Priority date: 2017-02-13
Filing date: 2017-07-27
Publication date: 2018-08-16
Also published as: CN206596215U

Abstract

The present invention relates to a vibration system in a sound production device and the sound production device. The vibration system comprises a vibration diaphragm assembly and a voice coil connected at the lower end of the vibration diaphragm assembly, and further comprises an FPCB board provided close to voice coil leads; a groove matching the lower end of the voice coil in a positioning manner is provided on the FPCB board; the voice coil is bonded in the groove of the FPCB board with glue, and two leads of the voice coil are connected in a circuit of the FPCB board. The vibration system also comprises a centering slice located at the lower end of the voice coil; the inner side of the centering slice is connected at the lower end of the FPCB board. According to the vibration system of the present invention, the lower end of the voice coil matches the groove of the FPCB board in a positioning manner, increasing the bonding area therebetween and improving the bonding strength, and moreover, the problem in the traditional structure of discrete bonding position caused by inaccurate positioning.

Description

Vibration system and sounding device in sounding device

Technical field

The present invention relates to the field of electroacoustic conversion, and more particularly to a vibration system in a sounding device; the present invention also relates to a sounding device.

Background technique

A speaker is an important acoustic component in an electronic device that is a transducer that converts an electrical signal into an acoustic signal. An existing speaker module includes a housing, and a magnetic circuit system disposed within the housing and a vibration system including a diaphragm and a voice coil disposed under the diaphragm. The voice coil drives the diaphragm to make sounds under the vibration of the magnetic circuit system.

The voice coil in the vibration system is wound by an enameled wire. The two free ends of the enameled wire are generally disposed at both ends of the voice coil. When connecting with an external circuit, the two ends of the enameled wire extend from the voice coil and are welded. The pads of the housing are connected to an external circuit. When the voice coil of the above structure is vibrating, both ends of the enameled wire will vibrate with the voice coil, but due to the material characteristics of the enameled wire, it may break and cause the failure of the sounding device.

Summary of the invention

It is an object of the present invention to provide a vibration system in a sounding device.

According to an aspect of the invention, a vibration system in a sounding device is provided, comprising a diaphragm assembly and a voice coil connected to a lower end of the diaphragm assembly; and an FPCB board disposed adjacent to the voice coil lead, disposed on the FPCB board a groove for mating with the lower end of the voice coil; the voice coil is glued into the groove of the FPCB board, and the two leads of the voice coil are connected to the circuit of the FPCB board;

Also included is a centering segment at the lower end of the voice coil, the inner side of which is attached to the lower end of the FPCB board.

Optionally, the FPCB board is provided with a ring that matches the shape of the lower end surface of the voice coil. shape.

Optionally, the FPCB board is provided with two wires respectively bonded to the two lead positions on the lower end surface of the voice coil.

Optionally, the voice coil has a rectangular shape, and two lead wires of the voice coil are located on a short side of the voice coil.

Optionally, the groove is a stepped groove extending to the edge of the FPCB board.

According to another aspect of the present invention, there is also provided a sounding device comprising a housing and a magnetic circuit system located in the housing, the vibration system described above.

The vibration system of the invention can connect the lead wires of the voice coil with the external circuit through the FPCB board, thereby avoiding the vibration cracking problem caused by the limitation of the material of the voice coil lead, and ensuring the stability of the connection structure. By setting the centering piece at the lower end of the voice coil, the polarization of the voice coil can be greatly reduced, and the vibration effect of the vibration system can be improved. The lower end of the voice coil is matched with the groove positioning of the FPCB board, which not only can increase the bonding area of the two, but also improve the bonding strength; and also solve the discrete position of the bonding position due to inaccurate positioning in the conventional structure. problem.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The accompanying drawings, which are incorporated in FIG

1 is a schematic view showing the structure of a vibration system of the present invention.

Figure 2 is a partial enlarged view of the position where the FPCB board of the present invention is connected to the voice coil.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail. The techniques, methods, and devices should be considered as part of the specification, where appropriate.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

Referring to Figure 1, the present invention provides a vibration system in a sounding device comprising a diaphragm assembly and a voice coil 3 coupled to the lower end of the diaphragm assembly. The diaphragm assembly of the present invention may be only a diaphragm 1, which includes a vibrating portion at the center, a connecting portion at the edge for connection, and a loop portion between the vibrating portion and the connecting portion. The structure of such a diaphragm is well known to those skilled in the art. The voice coil 3 is connected to the position of the vibrating portion of the diaphragm 1.

Of course, for the person skilled in the art, the diaphragm assembly may further include a dome 2, which is connected to the vibrating portion of the diaphragm, for example, may be bonded to the lower end of the vibrating portion by glue. The voice coil 3 is connected to the dome 2. It is also possible that a through hole is provided in the middle of the diaphragm 1, the dome 2 covers the through hole position of the diaphragm 1, and the voice coil 3 is attached to the dome 2.

The voice coil 3 can be wound by layers of enameled wires, and the whole can be square or rectangular. The two leads of the voice coil 3 are respectively located at opposite ends of the voice coil. For example, when the voice coil 3 selects a rectangular structure, its two leads may be respectively located on the two short sides or the long sides of the voice coil. The structure of such a voice coil is well known to those skilled in the art and will not be specifically described herein.

The vibration system of the present invention further includes an FPCB board 4 connected to a position on the lower end surface of the voice coil 3 adjacent to the voice coil lead, and the FPCB board 4 can be attached to the lower end surface of the voice coil 3 by bonding. . In a specific embodiment of the present invention, the FPCB board 4 is provided with a ring shape that matches the shape of the lower end surface of the voice coil 3. For example, the cross section of the voice coil 3 is rectangular, and the FPCB board 4 has a rectangular shape matched thereto. The FPCB board 4 is bonded to the entire annular lower end surface of the voice coil 3.

In another specific embodiment of the present invention, the FPCB board 4 may be provided with two, and the two FPCB boards 4 are respectively bonded to the two lead positions of the lower end surface of the voice coil 3, so that one lead can correspond to one. FPCB board 4.

The lead of the voice coil needs to be connected to the circuit of the FPCB board 4, so that the FPCB board 4 can function as a transfer and a hinge, thereby connecting the voice coil and the external circuit through the subsequent connecting line, thereby avoiding the conventional Problems such as breakage caused by the lead connection structure.

The vibrating system of the present invention further includes a centering piece 5 at the lower end of the voice coil 3, and the inner side of the centering piece 5 can be attached to the lower end of the FPCB board 4, for example, by bonding, and the outer side is used for sounding The housings of the device are connected together such that the polarization of the voice coil 3 can be greatly reduced by the centering support 5, and the vibration effect of the vibration system is improved.

The width of the bonding surface of the voice coil 3 is often narrow, depending on the wire diameter of the enamel wire and the number of layers of the voice coil. If the wire diameter is 0.1 mm and the number of layers is 4, the bonding surface width of the voice coil 3 is only 0.4mm, in order to improve the adhesion between the FPCB board 4 and the voice coil 3, a groove for mating with the lower end surface of the voice coil 3 is provided on the FPCB board 4, and the groove may be a rectangular groove. It may also be a stepped groove 42 extending to the edge of the FPCB board 4, with reference to FIG. At the time of bonding, the groove of the FPCB board 4 is fitted with the lower end of the voice coil 3, which makes it possible to apply glue between the side walls of the two, thereby increasing the bonding area of the two. Increased bond strength. At the same time, the installation and positioning of the two can be realized by the groove, and the problem of the dispersion of the bonding position due to the inaccurate positioning in the conventional structure is solved.

The present invention also provides a sounding device comprising a housing and a vibration system, a magnetic circuit system located in the housing. The magnetic circuit system includes a magnetic gap composed of a magnet and a washer located above the magnet. Such a magnetic circuit system belongs to common knowledge of those skilled in the art and will not be specifically described herein.

While the invention has been described in detail with reference to the preferred embodiments of the present invention, it is understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A vibration system in a sounding device, comprising: a diaphragm assembly and a voice coil (3) connected to a lower end of the diaphragm assembly; and an FPCB board (4) disposed adjacent to the voice coil (3) lead, The FPCB board (4) is provided with a groove for positioning with the lower end of the voice coil (3); the voice coil (3) is glued into the groove of the FPCB board (4), and the voice coil The two leads of (3) are connected to the circuit of the FPCB board (4);

Also included is a centering piece (5) at the lower end of the voice coil (3), the inner side of which is connected to the lower end of the FPCB board (4).
A vibration system according to claim 1, characterized in that said FPCB board (4) is provided with a ring shape which matches the shape of the lower end surface of the voice coil (3).
The vibration system according to claim 1, characterized in that the FPCB board (4) is provided with two, respectively bonded to the two lead positions of the lower end surface of the voice coil (3).
The vibration system according to any one of claims 1 to 3, characterized in that the voice coil (3) has a rectangular shape, and two lead wires of the voice coil (3) are located on the short side of the voice coil (3) on.
The vibration system according to any one of claims 1 to 4, characterized in that the groove is a stepped groove (42) extending to the edge of the FPCB board (4).
A sounding device comprising a housing and a magnetic circuit system located in the housing, the vibration system according to any one of claims 1 to 5.