CN110572754A

CN110572754A - Vibration system of sound production device and forming method thereof

Info

Publication number: CN110572754A
Application number: CN201910790478.1A
Authority: CN
Inventors: 王亚南; 赵荣秀; 邵明辉
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2019-12-13
Also published as: WO2021035869A1

Abstract

The invention discloses a vibration system of a sound generating device, which comprises a voice coil assembly and a vibrating diaphragm assembly which are mutually connected and fixed, wherein the voice coil assembly comprises a voice coil framework and a voice coil wound on the voice coil framework, the vibrating diaphragm assembly comprises a cone and a folding ring which are combined in an injection molding mode, the cone and the voice coil framework are combined together, an inner conductive part is arranged on the voice coil framework, the inner conductive part is electrically connected with an outer conductive part of the sound generating device through an electric connection part, and at least part of the electric connection part is injected inside the vibrating diaphragm assembly. The vibration system of the sound production device is beneficial to thinning of products, and can improve the problem of wire breakage without influencing the performance. The invention also discloses a molding method of the vibration system of the sound production device, and the electric connection part can be at least partially injected into the vibration diaphragm component by the method.

Description

Vibration system of sound production device and forming method thereof

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a vibration system of a sound generating device and a forming method thereof.

background

a speaker is widely used in various electronic devices as an electroacoustic conversion device to realize a basic sound generating function. In recent years, with the rise of smart speakers and smart home industries, because more and more spaces are required to assemble smart control systems, etc., the space reserved for speakers by consumer electronics terminals is no longer sufficient as that of traditional speakers, and especially in the height direction, i.e., with respect to the volume of the speakers themselves, thinning is becoming an important trend.

In the existing conventional loudspeaker design, the voice coil and the conductive terminal are generally connected through a lead, after assembly, the lead is located between the composite basin and the centering support, and in order to avoid the friction and the collision of the lead in the vibration process, enough space needs to be reserved for the lead in the Z direction, which is obviously not beneficial to achieving the requirement of product thinning.

In order to solve the above problems, in the prior art, an attempt is made to sew a lead in a centering branch piece to reduce the height requirement in the Z direction, but the method also has certain disadvantages: for the design of a large-caliber voice coil, the size of the centering branch piece is greatly reduced, and if a lead is sewn in the centering branch piece, the fatigue of the centering branch piece easily causes wire breakage; moreover, for some products, especially those with a stiffener having a much greater compliance than the hinge loop, sewing a thread to the stiffener may further exacerbate pair F_0、THD, etc. of the acoustic properties.

Therefore, there is a need for further improvement of the existing speaker structure to solve the above problems.

Disclosure of Invention

The technical problem that this patent will be solved is through moulding plastics in the vibrating diaphragm subassembly with the electric connection portion that is used for switching on inside and outside circuit, on the basis that does not influence product performance, improves the problem of broken string to do benefit to the product slimming. The specific technical scheme provided by the invention is as follows:

A vibration system of a sound generating device comprises a voice coil assembly and a vibrating diaphragm assembly which are mutually connected and fixed, wherein the voice coil assembly comprises a voice coil framework and a voice coil wound on the voice coil framework, the vibrating diaphragm assembly comprises a cone basin and a folding ring which are combined in an injection molding mode, the cone basin and the voice coil framework are combined together, an inner conductive part is arranged on the voice coil framework, and the inner conductive part is electrically connected with an outer conductive part of the sound generating device through an electric connection part; the electric connection part is at least partially injected inside the diaphragm assembly.

Preferably, the inner conductive part is an inner pad disposed on the voice coil bobbin.

Preferably, the number of the inner welding discs is two, and the inner welding discs are symmetrically arranged on the outer peripheral surface of the voice coil framework.

Preferably, the electrical connection portion includes an inner connection portion for electrically connecting with the inner conductive portion, an outer connection portion for electrically connecting with the outer conductive portion of the sound generating device, and an intermediate portion connecting the inner connection portion and the outer connection portion.

Preferably, the cone basin is integrally of a conical annular structure with openings at two ends, and the inner connecting portion penetrates out of the opening at the bottom end of the cone basin and is welded on the inner bonding pad of the voice coil framework.

Preferably, the middle portion extends from the inner connecting portion to a position close to the outer conductive portion of the sound generating device along the conical surface of the cone.

Preferably, the outer connecting portion corresponds to an outer edge of the corrugated rim, and the outer connecting portion is welded and fixed to the outer conductive portion of the sound generating device.

Preferably, the electrical connection part is two wires, and the main body of the electrical connection part is wrapped inside the diaphragm assembly.

Preferably, the whole middle part of the lead is positioned inside the diaphragm assembly; or the whole of the lead is positioned inside the diaphragm assembly.

Preferably, the middle part of the lead comprises a first part wrapped inside by the cone and a second part wrapped inside by the corrugated rim.

Preferably, the cone is made of paper, and/or the folding ring is made of rubber.

According to the vibration system of the sound generating device, the basic structure of the vibration system in the prior art is utilized, and the electric connection part for conducting the internal circuit and the external circuit is at least partially injected inside the vibration diaphragm assembly; on the other hand, the electric connection part is injected into the vibrating diaphragm assembly, and can be flexibly arranged along the vibrating diaphragm assembly, compared with the method of sewing a lead in the centering disk in the prior art, the problem of wire breakage caused by fatigue of the centering disk can be solved on the basis of not influencing the acoustic performance by adjusting the track of the arranged line, and the reliability is improved.

According to another concept of the present invention, there is also provided a method of forming a vibration system of a sound generating apparatus, including:

S1, injection molding a cone with partial thickness;

S2, providing an electric connection part which is a lead; the conducting wire extends out of the opening at the bottom end of the cone basin and is arranged along the outer conical surface of the formed cone basin to the position of the outer conducting part of the sound generating device;

S3, injection molding a cone with the other part of thickness, wrapping part of the lead in the complete cone, and injection molding the whole body;

S4, injection molding a folding ring, wherein the folding ring is combined with the cone to form a diaphragm assembly; the lead, the cone basin and the folding ring are integrally injected together.

Preferably, a voice coil and a voice coil framework are further provided, and the voice coil is wound on the outer peripheral surface of the voice coil framework; and the voice coil framework is provided with an inner conductive part, and the lead extends out of the opening at the bottom end of the cone basin and then is welded with the inner conductive part.

Preferably, the lead extends along the conical surface of the cone basin to the outer edge of the corrugated rim and is welded and fixed with the outer conductive part.

The forming method of the vibration system of the sound generating device replaces the process of integrally forming the composite basin and then arranging the lead in the same line in the prior art, but integrally injection-molds the lead, the cone basin and the folding ring together, so that the problem of wire breakage can be effectively avoided after forming, and the performance of the vibration system of the sound generating device can not be influenced.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

drawings

the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a cross-sectional view of a sound generating device according to an embodiment of the present invention with a magnetic circuit system removed;

Fig. 2 is a top view of the sound generating device according to the embodiment of the present invention with the magnetic circuit system removed;

Fig. 3 is a schematic diagram of a method for forming a vibration system of a sound generating device according to the present invention.

description of reference numerals:

1. Voice coil assembly, 11, voice coil, 12, voice coil skeleton, 2, vibrating diaphragm assembly, 21, dog collar, 22, cone, 3, electric connection portion, 4, outer conductive part.

Detailed Description

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

the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one aspect of the invention, the invention provides a vibration system of a sound generating device, which comprises a voice coil assembly and a vibrating diaphragm assembly which are mutually connected and fixed, wherein the voice coil assembly comprises a voice coil framework and a voice coil wound on the voice coil framework, the vibrating diaphragm assembly comprises a cone basin and a folding ring which are combined in an injection molding mode, the cone basin and the voice coil framework are combined together, an inner conductive part is arranged on the voice coil framework, the inner conductive part is electrically connected with an outer conductive part of the sound generating device through an electric connection part, and at least part of the electric connection part is injected inside the vibrating diaphragm assembly.

The invention is further elucidated with reference to the drawing.

Example (b):

For example, as shown in fig. 1 and fig. 2 together, the vibration system of the sound generating apparatus of the present embodiment includes a voice coil assembly 1 and a diaphragm assembly 2 connected together, where the voice coil assembly 1 includes a voice coil 11 and a voice coil bobbin 12, and the voice coil 11 is wound around an outer circumferential surface of the voice coil bobbin 12 and is located at a lower end position of the voice coil bobbin 12. The voice coil former 12 may provide a supporting function for the voice coil 11 and may serve as a bridge for connecting the voice coil 11 and the diaphragm assembly 2. In an implementation, in consideration of weight reduction, heat dissipation, and the like, a plurality of ventilation holes (not shown) may be formed in the voice coil bobbin 12. The above is well known to those skilled in the art and will not be described in detail herein.

Diaphragm subassembly 2 is including moulding plastics the dog collar 21 and the awl basin 22 that combine together, and wherein, dog collar 21 sets up to be including the bellied structure of arc, and its outside is fixed on sound generating mechanism's casing usually, and the inboard combines with awl basin 22, and awl basin 22 combines together with voice coil former 12 again, has so just realized voice coil assembly 1 and diaphragm subassembly 2's integral connection.

In a sound generating device with a large volume and high power, a centering support structure is often provided, which is usually a part of a vibration system, and one end of the centering support structure is connected and fixed with the voice coil assembly 1 (specifically, the hi voice coil bobbin 12), and the other end of the centering support structure is fixed with an external shell of the sound generating device.

It is known that the sound generating device is operated normally, and the sound generating device reciprocates under the action of electromagnetic field force to generate sound, so that a corresponding electric connection structure is needed to conduct the communication between the inside and the outside of the vibration system. In the present embodiment, the inner conductive portion, the electrical connection portion 3 and the outer conductive portion 4 are used together, and specifically, the voice coil bobbin 12 is provided with the inner conductive portion, which may be an inner pad (not shown), the inner pad is electrically connected to the outer conductive portion 4 through the electrical connection portion 3, and an external current signal is transmitted to the voice coil 11 through the above-mentioned path.

In specific implementation, two inner pads are preferably provided, and are symmetrically provided on the outer circumference of the voice coil bobbin 12, and on this basis, the electrical connection portion 3 and the outer conductive portion 4 are also preferably provided correspondingly as two. The two symmetrically arranged conductive structures are adopted, so that polarization caused by asymmetric structure can be prevented to a certain extent.

in the present embodiment, the electrical connection portion 3 is a conductive wire (lead wire), and includes an inner connection portion for electrically connecting with the inner pad 121, an outer connection portion for electrically connecting with the outer conductive portion 4, and an intermediate portion connecting the inner connection portion and the outer connection portion. Of course, the wire is an integrally formed wire body, and the different functions of the different parts are differentiated herein for the sake of clarity. In this technical scheme, consider that prior art, when the wire sets up between compound basin and centering branch piece, need reserve certain space in the Z of product outwards, to the wiping of wire when avoiding vibrating, on the other hand considers that will influence the performance when weaving the wire in centering branch piece, consequently this application moulds plastics the inside at vibrating diaphragm subassembly 2 with at least part of wire.

As can be seen from fig. 1 and fig. 2, the cone 22 is integrally a conical ring structure with openings at both ends, and the inner connection portion of the two wires can penetrate through the opening at the bottom end of the cone 22 and be welded on the inner bonding pad of the voice coil bobbin 12. Of course, for easier soldering, the inner pad may be disposed near the voice coil bobbin 12 at the position where it is connected to the cone 22, so that the inner connection portion of the lead can be soldered to the inner pad naturally after passing through the bottom opening. After the wires are soldered to the inner pads, the wires continue to extend from the inner connecting portion along the tapered surface of the tapered cone 22 to a position close to the outer conductive portion 4 of the sound generating device, which is defined as the middle portion, and the outer connecting portion is the portion of the wires corresponding to the inner connecting portion and electrically connected to the outer conductive portion 4. Preferably, the outer connecting portion is welded and fixed to the outer conductive portion 4 at a position corresponding to the outer edge of the edge 21.

It should be noted that the cone 22 is illustrated herein as a cone structure that forms the diaphragm assembly together with the corrugated rim 21, and in a specific molding process, the cone 22 is not formed in one step, but is formed in a part of the structure, and relevant parts will be described in detail in a part of the molding method.

That is, in the present embodiment, at least a portion of the lead wire as the electrical connection portion 3 is molded inside the cone 22 and the corrugated rim 21, and the portion is entirely covered by the cone 22 and the corrugated rim 21. Except for the small part of the wire welded with the inner bonding pad and the outer conductive part 4, the middle part of the whole wire can be integrally molded inside the diaphragm component 2, and certainly, the mode that the wire is completely molded inside the diaphragm component 2 is not eliminated, and the wire can be flexibly designed according to the requirement.

The portion of the middle portion of the wire, which is enclosed inside by the cone 22, is defined as a first portion, and the portion enclosed inside by the corrugated rim 21 is defined as a second portion. In the present embodiment, the cone 22 and the corrugated rim 21 are injection-molded and coupled together, and the lead wire is injection-molded integrally with the cone 22 and the corrugated rim, and therefore, the cone 22 is preferably made of paper, and the corrugated rim is preferably made of rubber, such as silicone rubber. It is to be understood that the present invention is only illustrative and not intended to be limited thereto, and may be made of other materials without affecting the practice of the present invention.

in the vibration system of the sound generating device provided by the embodiment, because the lead for conducting the internal and external circuits is injected inside the vibrating diaphragm assembly, on one hand, a space does not need to be reserved for the electric connection part in the Z direction, and the sound generating device applying the vibration system is thinner; on the other hand, compared with the method of sewing the lead in the centering disk in the prior art, the problem of wire breakage caused by fatigue of the centering disk can be improved on the basis of not influencing the acoustic performance by adjusting the following track.

according to another aspect of the present invention, the applicant further describes the method for forming the above-mentioned vibrating system as follows:

s1: in this step, a cone of partial thickness is first injection molded. The thickness of the portion mentioned here may be 1/2 of the thickness, or may be other proportion of the thickness compared to the whole, and the formed cone 22 is not a real cone strictly speaking, but only a part of the cone, but for convenience of explanation, the cone 22 is used to indicate a conical structure connected to the corrugated rim 21.

s2, providing an electric connection part 3, wherein the electric connection part 3 is a lead; the conducting wire extends out from the opening at the bottom end of the cone 22 and follows the line along the outer conical surface of the formed cone 22 to the position of the outer conducting part 4; in this step, the wire is first straightened from the inner side of the opening of the cone 22, passes through the opening at the bottom end, and is directly welded and fixed to the inner pad on the voice coil bobbin 12, and after welding, the wire is straightened along the conical surface of the cone 22, and when straightened to the topmost end of the cone 22, the wire is straightened to the direction of the outer conductive part 4, and finally straightened to the vicinity of the outer edge of the corrugated rim 21, and is welded and fixed to the outer conductive part 4.

And S3, injection molding the cone 22 with the other part of thickness, wrapping part of the lead in the complete cone, and injection molding the whole. In this step, the cone 22 is injection molded integrally with the portion of the wire that follows the taper of the cone 22. After being integrally formed, the part of the conducting wire is embedded inside the cone 22.

S4, injection molding the folding ring 21, combining the folding ring 21 and the cone basin 22 into the vibrating diaphragm component 2 in an injection molding mode, and simultaneously integrally injecting the formed lead, the cone basin 22 and the folding ring 21 together. Similarly, the wire wrapped by the folded loop 21 is mainly the portion of the wire which is not wrapped by the cone 22 in S3 in the S2 following step, and through the S4 step, the entire middle portion of the wire can be embedded inside the diaphragm assembly 2.

It should be noted here that, in the implementation, the outer connecting portion of the wire as a portion directly soldered and fixed to the outer conductive portion 4 is actually the outermost end of the wire, and the outermost end of the wire can be theoretically wrapped after the edge 21 is also molded, but from the viewpoint of technical implementation, it is easily understood that the outermost end of the wire is likely to be exposed as a small portion of the wire at a position between the outer edge of the edge 21 and the outer conductive portion 4. But this part does not affect the overall realization and effect of the technical solution, because the whole lead is still passed through the cone 22 and the corrugated rim 21.

it should be noted that, in the specific following process, the total track of the conducting wire is along the conical surface of the cone 22 and along the position close to the outer conductive part 4 (actually, the area covered by the corrugated rim 21), but the specific following track of each section, whether there is a bending section, etc. are not limited, and can be flexibly selected according to actual requirements.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a sound generating mechanism's vibration system, includes fixed voice coil loudspeaker voice coil subassembly and vibrating diaphragm subassembly of interconnect, the voice coil loudspeaker voice coil subassembly includes voice coil loudspeaker voice coil skeleton and winds and establishes voice coil loudspeaker voice coil on the voice coil loudspeaker voice coil skeleton, the vibrating diaphragm subassembly is including the awl basin and the book ring that mould plastics and combine, the awl basin with the voice coil loudspeaker voice coil skeleton combines together its characterized in that: an inner conductive part is arranged on the voice coil framework and is electrically connected with an outer conductive part of the sounding device through an electric connection part; the electric connection part is at least partially injected inside the diaphragm assembly.

2. The vibratory system of claim 1, wherein: the inner conductive part is an inner bonding pad arranged on the voice coil framework.

3. The vibratory system of claim 2, wherein: the inner welding discs are arranged in two numbers, and the outer peripheral surfaces of the voice coil frameworks are symmetrically arranged.

4. The vibratory system of claim 1, wherein: the electric connection part comprises an inner connection part electrically connected with the inner conductive part, an outer connection part electrically connected with the outer conductive part of the sound generating device and an intermediate part connecting the inner connection part and the outer connection part.

5. The vibratory system of claim 4, wherein: the cone basin is integrally of a conical annular structure with two open ends, and the inner connecting portion penetrates out of the bottom opening of the cone basin and is welded on the inner bonding pad of the voice coil framework.

6. The vibratory system of claim 4, wherein: the middle part extends to a position close to the outer conductive part of the sound generating device from the inner connecting part along the conical surface of the cone basin.

7. The vibratory system of claim 4, wherein: the outer connecting portion corresponds to the outer edge of the folded ring, and the outer connecting portion is welded and fixed with the outer conductive portion of the sound generating device.

8. the vibratory system of any of claims 1-7, wherein: the electric connection part is two wires of which the main body is wrapped inside the diaphragm assembly.

9. the vibratory system of claim 8, wherein: the whole middle part of the lead is positioned inside the diaphragm assembly; or the whole of the lead is positioned inside the diaphragm assembly.

10. The vibratory system of claim 9, wherein: the middle part of the lead comprises a first part wrapped inside by the cone and a second part wrapped inside by the folded ring.

11. the vibratory system of claim 1, wherein: the cone is made of paper; and/or the folding ring is made of rubber.

12. A method of forming a vibratory system for a sound generating device, comprising:

s1, injection molding a cone with partial thickness;

13. The method of forming a vibratory system of claim 12, wherein:

The voice coil is wound on the outer peripheral surface of the voice coil framework; and the voice coil framework is provided with an inner conductive part, and the lead extends out of the opening at the bottom end of the cone basin and then is welded with the inner conductive part.

14. The method of forming a vibratory system of claim 12, wherein:

The lead extends along the conical surface of the cone basin to the outer edge of the folding ring and is welded and fixed with the outer conductive part.