CN111970825A

CN111970825A - Integrated novel voice coil and manufacturing method thereof

Info

Publication number: CN111970825A
Application number: CN202010458768.9A
Authority: CN
Inventors: 杨意会; 徐坤锦
Original assignee: Shenzhen Qianhaizhenbaiyi Technology Co ltd
Current assignee: Shenzhen Qianhaizhenbaiyi Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-11-20

Abstract

The invention discloses an integrated novel voice coil and a manufacturing method thereof, and the integrated novel voice coil comprises a voice cylinder (1) made of a base material of a Flexible Printed Circuit (FPC), an integrated inductance coil (2) formed by etching or laser engraving an FPC base material and an integrated copper-clad layer thereof or printing a conducting Circuit on the FPC base material, and two Circuit board coil bonding pads (3) formed on the voice coil (1) and used for connecting a Circuit board. The coil circuit and the sound tube are integrated, the probability of wire scattering and wire off of the coil is zero, the materials are only copper foil and FPC base materials which can resist temperature over 300 ℃, and the loudspeaker is lighter and thinner, so that the magnetic materials of the loudspeaker can be correspondingly reduced, the size is reduced, and the effects of reducing cost and saving energy are achieved.

Description

Integrated novel voice coil and manufacturing method thereof

Technical Field

The invention relates to the field of audio equipment, in particular to an integrated novel voice coil and a manufacturing method thereof.

Background

In the prior art, an insulating sheet material, a metal sheet material or a mixture sheet material is often adopted in a sound tube and rolled into a tubular shape with a set diameter to be used as a framework of a voice coil. One end of the voice tube is uniformly wound with an enameled copper wire to form a coil, and after the coil is wound to a specified number of turns, the two ends of the coil are led out and are wound and fixed by an insulating material to complete the manufacture of the voice coil.

The defects of the existing voice coil;

1. the material is formed by stacking a plurality of materials, and the temperature resistance of the materials is insufficient and is not more than 250 ℃ due to different temperature resistances. The firmness of the pasting is unstable, the hardness of the voice coil is unstable, and poor line scattering/line falling is easy to occur;

2. the framework and the copper wire are separated and are attached by glue, so that the weight of the glue is increased;

3. the thickness of the insulating layer of the enameled wire, the gap between the enameled wires, the thickness of glue and the superposition of various thicknesses make the enameled wire difficult to be made thin;

the voice coil is a device with relatively tight requirements, and the existing manufacturing process of the voice coil is difficult to realize automatic production. At present, the production is carried out in a semi-automatic winding and segmenting operation mode, the yield is low, and the reliability and consistency are poor during mass production.

The method has the advantages of no possibility of repair, high reject ratio, more factors influencing the product quality, material characteristics, winding method/strength/density/uniformity, temperature resistance/adhesive force/curing degree/hardness/toughness of fixing glue, wire drawing uniformity of copper wires of enameled wires/purity of copper materials/thickness of insulating paint/uniformity of insulating paint, strength/temperature resistance/heat conductivity of a framework, and bonding strength/uniformity/temperature resistance of sticker or glue for fixing leads, and the factors can cause high defects of wire scattering/wire breakage/short circuit/deformation and the like and large index error of product performance, and cause high cost of finished products.

Disclosure of Invention

The invention aims to solve the technical problem of a novel integrated voice coil and a manufacturing method thereof, the voice coil manufactured by adopting a flexible printed circuit board/a flexible circuit board can realize automatic production, has stable material characteristics and production process, and can solve all the defects of the existing voice coil.

The invention is realized by the following technical scheme: the utility model provides a novel voice coil loudspeaker voice coil of integration, includes the sound section of thick bamboo that forms by the preparation of FPC substrate to and the inductance coils of integration based on the sound section of thick bamboo preparation forms, and form two circuit board coil pad on the sound section of thick bamboo, be used for the connecting circuit board.

As a preferable technical scheme, the sound tube is made of an FPC base material, and the inductance coil is integrally formed on the sound tube.

As a preferred technical scheme, the inductance coil is formed by copper-clad etching or laser engraving of an FPC substrate or printing of a conductive circuit on the substrate.

A manufacturing method of an integrated novel voice coil comprises the following steps:

s1, preparing a single-layer or multi-layer FPC substrate, and coating copper on the surface of the FPC substrate to etch or laser engrave or print a conductive circuit on the substrate according to a given design;

s2, laminating and winding the single-layer or multi-layer FPC formed by the circuit to form a sound tube;

s3, forming metallized holes through drilling and electroplating, forming conductive paths among different layers and rolling into coils;

and S4, finally, after high-temperature shaping, the voice coil with the integrated voice tube and the induction coil is manufactured.

The invention has the beneficial effects that: the novel integrated voice coil adopts a Flexible Printed Circuit (FPC for short), and the Flexible Printed Circuit is connected with a voice coil through a Flexible Printed Circuit;

the FPC has the characteristics of high wiring density, light weight, thin thickness and low cost, and the voice coil framework and the coil are integrated by adopting the voice coil of the FPC, so that the production links and raw materials of the voice coil are reduced, the production efficiency of the voice coil is improved, and the cost of the voice coil is reduced;

meanwhile, the characteristics of the FPC are utilized to ensure that the vibration body such as the loudspeaker adopting the voice coil has the advantages of small magnetic gap, high efficiency, good sound quality and low cost, and the application range is very wide.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly

In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the integrated voice coil of the present invention includes a sound tube 1 made of an FPC substrate with copper foil, and an integrated inductance coil 2 made based on the sound tube 1, and two circuit board coil pads 3 are formed on the sound tube 1 for connecting a circuit board.

In this embodiment, sound tube 1 is the sound tube that is prepared by the FPC substrate, and inductance coils 2 formula as an organic whole sets up the inductance coils on sound tube 1, and the appearance is the same with traditional voice coil loudspeaker voice coil, but sets up the structure of formula as an organic whole between inductance coils and the sound tube, can effectually solve a great deal of not enough among the prior art.

In this embodiment, the inductance coil 2 is a coil formed by etching or laser engraving the FPC substrate and the integrated copper-clad layer thereof, or printing a conductive circuit on the FPC substrate. Because the material only has two temperature resistance of copper foil and FPC substrate and can reach more than 300 ℃, and is lighter and thinner, the magnetic material can be correspondingly reduced, the volume of the loudspeaker is reduced, and the effects of reducing cost and saving energy are achieved.

The specific voice coil manufacturing steps are as follows:

firstly, preparing a single-layer or multi-layer FPC base material, and cutting the single-layer or multi-layer FPC base material into a proper size; then, laminating and winding the single-layer or multi-layer flexible circuit layer of the formed pipe body together to form a sound tube (1); forming metallized holes through drilling and electroplating, forming conductive paths among different layers and forming a coil (2); and finally, after high-temperature setting, the voice coil with the integrated voice tube and the induction coil is manufactured.

The invention has the beneficial effects that: the novel integrated voice coil adopts a Flexible Printed Circuit (FPC for short), and a Flexible Printed Circuit board (FPC for short) is adopted. The FPC has the characteristics of high wiring density, light weight, thin thickness and low cost, and the voice coil of the FPC is adopted to realize the integration of the voice tube and the coil, so that the production links and raw materials of the voice coil are reduced, the production efficiency of the voice coil is improved, and the cost of the voice coil is reduced. Meanwhile, the characteristics of the FPC are utilized to ensure that the vibration bodies such as the loudspeaker adopting the voice coil have the advantages of small magnetic gap, high efficiency, good sound quality and low cost. The application range is very wide.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a novel voice coil loudspeaker voice coil of integration which characterized in that: the novel loudspeaker comprises a sound tube (1) prepared from an FPC (flexible printed circuit) base material with copper foil, an integrated inductance coil (2) manufactured on the basis of the sound tube (1), and two circuit board coil bonding pads (3) formed on the sound tube (1) and used for connecting a circuit board.

2. The integrated voice coil of claim 1, wherein: the sound tube (1) is prepared from an FPC base material, and the inductance coil (2) is integrally arranged on the sound tube (1).

3. The integrated voice coil of claim 2, wherein: the inductance coil (2) is formed by etching or laser engraving of an FPC (flexible printed circuit) base material and an integrated copper-clad layer thereof.

4. A manufacturing method of an integrated novel voice coil is characterized by comprising the following steps:

s1, preparing a single-layer or multi-layer FPC base material, and cutting the single-layer or multi-layer FPC base material into a proper size;

s2, laminating the single-layer or multi-layer flexible circuit layers of the formed sound tube;

s3, after laminating, forming metallized holes through drilling and electroplating, forming conductive paths among different layers and forming a coil (2);

and S4, finally, after high-temperature shaping, the sound tube (1) and the induction coil (2) with integration are manufactured.