WO2018145385A1

WO2018145385A1 - Connection structure for voice coil in sound generating device and sound generating device

Info

Publication number: WO2018145385A1
Application number: PCT/CN2017/089351
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: 2017-06-21
Publication date: 2018-08-16
Also published as: CN206596208U

Abstract

The present invention relates to a connection structure for a voice coil in a sound generating device and a sound generating device. The connection structure comprises: an FPCB board, and a voice coil comprising two lead wires, the FPCB board being connected to a lower end face of the voice coil at a position of the lead wires of the voice coil, and the two lead wires of the voice coil being connected to a circuit of the FPCB board; a connection line, one end of the connection line being connected onto a pad of the FPCB board; and a support portion for supporting a part of the connection line on the FPCB board. According to the connection structure of the present invention, by providing the FPCB board at the lower end of the voice coil, the lead wires of the voice coil can be connected to an external circuit by means of the FPCB board and the connection line, thus avoiding the problem of vibration fracture caused by restrictions of the material of the lead wires of the voice coil, and guaranteeing the stability of the connection structure. In addition, a certain distance is kept between the connection line and the FPCB board by means of the support portion, to avoid the friction of the connection line and the FPCB board during vibration.

Description

Connecting structure and sounding device of voice coil 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, and more particularly to a voice coil structure in a vibration system; and 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

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection structure of a voice coil in a sound emitting device.

According to an aspect of the present invention, a connection structure of a voice coil in a sound emitting device is provided, comprising an FPCB board, a voice coil having two leads, the FPCB board being connected to a position adjacent to the voice coil lead on a lower end surface of the voice coil, and The two leads of the voice coil are connected to the circuit of the FPCB board; further comprising a connecting line, one end of the connecting line is connected to the pad of the FPCB board; and the supporting part supporting the partial connecting line on the FPCB board .

Optionally, the support portion is disposed adjacent to the pad.

Optionally, the support portion is a PI material.

Optionally, one end of the support portion is bonded to the FPCB board, and the connection line is bonded to the support The other end of the support.

Optionally, the support portion has a thickness of 0.1 mm to 0.2 mm.

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

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 connecting line is a silk thread.

According to another aspect of the present invention, there is also provided a sounding device comprising the above-described connection structure.

The connecting structure of the present invention can connect the lead wires of the voice coil to the external circuit through the FPCB board and the connecting line by providing the FPCB board at the lower end of the voice coil, thereby avoiding the limitation of the material of the voice coil lead. The vibration fracture problem ensures the stability of the connection structure. In addition, the support line is kept at a certain distance from the FPCB board through the support portion, so that the connection between the connection line and the FPCB board during vibration can be avoided.

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

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of the joint structure of the present invention.

Figure 2 is a cross-sectional view showing the position of the support portion of Figure 1.

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 at least one exemplary embodiment is merely illustrative and is in no way Any limitations to the invention and its application or use.

Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but the techniques, methods and apparatus 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 Figures 1 and 2, the present invention provides a connection structure for a voice coil in a sounding device comprising an FPCB board 2, a voice coil 1 having two leads. The voice coil 1 can be wound by layers of enameled wires, and the whole can be square or rectangular. The two leads of the voice coil 1 are respectively located at opposite ends of the voice coil. For example, when the voice coil 1 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 FPCB board 2 is connected to a position on the lower end surface of the voice coil 1 adjacent to the voice coil lead, and the FPCB board 2 can be attached to the lower end surface of the voice coil 1 by bonding. In a specific embodiment of the present invention, the FPCB board 2 is provided with a ring shape that matches the shape of the lower end surface of the voice coil 1. For example, the cross section of the voice coil 1 is rectangular, and the FPCB board 2 has a rectangular shape matched thereto. The FPCB board 2 is bonded to the annular lower end surface of the voice coil 1.

In another specific embodiment of the present invention, the FPCB board 2 may be provided with two, and the two FPCB boards 2 are respectively bonded to the two lead positions of the lower end surface of the voice coil 1 so that one lead can correspond to one. FPCB board 2.

The lead of the present invention needs to be connected to the circuit of the FPCB board 2, so that the FPCB board 2 can function as a transfer and a hub. To this end, the connection structure of the present invention further includes a connecting wire 5, one end of which can be connected to the pad 4 of the FPCB board 2, for example, by soldering. The other end of the connecting wire 5 of the present invention is used for connection with an external circuit, for example, it may be directly connected to an external circuit or may be connected to a pad for the sounding device to be connected to an external terminal. The connecting wire 5 may be a wire or the like which is well known to those skilled in the art.

The connection structure of the present invention further includes a support portion 3 for supporting a part of the connection wires 5 on the FPCB board 2, with reference to Figs. The support portion 3 of the present invention can be bonded, for example, to the FPCB board 2, and a corresponding portion of the connection line 5 can be bonded to the support portion 3. The support portion 3 can maintain a certain distance between the FPCB board 2 and the connecting line 5, and when the FPCB board 2 vibrates with the voice coil, the rubbing between the connecting line 5 and the FPCB board 2 can be avoided.

According to the connection structure of the present invention, by providing an FPCB board at the lower end of the voice coil, the lead wires of the voice coil can be connected to the external circuit through the FPCB board and the connecting line 5, thereby avoiding the limitation of the material of the voice coil lead. The vibration fracture problem ensures the stability of the connection structure. In addition, the support line is kept at a certain distance from the FPCB board through the support portion, so that the connection between the connection line and the FPCB board during vibration can be avoided.

In a preferred embodiment of the invention, the support portion 3 is disposed adjacent to the pad 4, that is, the support portion 3 is adjacent to the position where the connection line 5 is soldered to the FPCB board 2. The connection line 5 starts from the position of the pad 4, is supported by the support portion 3, and is drawn outward by bending deformation, thereby avoiding the contact of the connection line 5 with the FPCB board 2.

The support portion 3 of the present invention may be made of a PI material. Of course, other soft plastic materials and the like may be used by those skilled in the art. The distance between the connecting wire 5 and the FPCB board 2 depends on the thickness of the support portion 3. In a specific embodiment of the invention, the thickness of the support portion 3 may be between 0.1 mm and 0.2 mm.

The present invention also provides a sounding device including a vibration system including the above-described connection structure and a diaphragm, and a magnetic circuit system including a magnetic gap composed of a magnet. The lead wires of the voice coil are connected to the external circuit in the above manner, and the structural stability of the sounding device can be greatly improved.

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 connecting structure of a voice coil in a sounding device, comprising: an FPCB board (2), a voice coil (1) having two leads, the FPCB board (2) being connected to a lower end surface of the voice coil (1) Adjacent to the position of the voice coil lead, and the two leads of the voice coil (1) are connected to the circuit of the FPCB board (2); further comprising a connecting line (5), one end of the connecting line (5) being connected to the FPCB The pad (4) of the board (2); further includes a support portion (3) for supporting a part of the connecting line (5) on the FPCB board (2).
The connection structure according to claim 1, characterized in that the support portion (3) is disposed at a position adjacent to the pad (4).
The joint structure according to claim 1 or 2, characterized in that the support portion (3) is a PI material.
The connection structure according to claim 1 or 2 or 3, characterized in that one end of the support portion (3) is bonded to the FPCB board (2), and the connection line (5) is bonded to the support portion ( 3) The other end.
The joint structure according to any one of claims 1 to 4, characterized in that the thickness of the support portion (3) is from 0.1 mm to 0.2 mm.
The connection structure according to any one of claims 1 to 5, characterized in that the FPCB board (2) is provided with a ring shape matching the shape of the lower end surface of the voice coil (1).
The connection structure according to any one of claims 1 to 5, characterized in that the FPCB board (2) is provided with two, respectively bonded to the two lead positions of the lower end surface of the voice coil (1).
The connection structure according to any one of claims 1 to 7, characterized in that the voice coil (1) has a rectangular shape, and the two lead wires of the voice coil (1) are located on the short side of the voice coil (1) on.
The connection structure according to any one of claims 1 to 7, characterized in that the connecting line (5) is a silk thread.
A sounding device comprising the connection structure according to any one of claims 1 to 9.