CN212324357U

CN212324357U - Skeleton voice coil and electroacoustic conversion device

Info

Publication number: CN212324357U
Application number: CN202021463566.5U
Authority: CN
Inventors: 张韬; 闫鑫; 赵洪强
Original assignee: KING TONE INNOVATION
Current assignee: KING TONE INNOVATION
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-01-08
Anticipated expiration: 2030-07-22

Abstract

The embodiment of the utility model provides a skeleton voice coil loudspeaker voice coil and electro-acoustic transducer. At least two voice coils are fixed by adopting the framework, so that the size of the voice coils along the axial direction and the relative position along the axial direction are convenient to adjust. Therefore, the voice coils can be arranged at the position with the maximum magnetic flux in the magnetic gap, the sensitivity is improved, total harmonic distortion is restrained, and the real-time feedback effect of the electro-acoustic conversion device adopting the framework voice coil of the embodiment is better.

Description

Skeleton voice coil and electroacoustic conversion device

Technical Field

The utility model relates to an electronic product technical field especially relates to a skeleton voice coil loudspeaker voice coil and electro-acoustic transducer.

Background

The electroacoustic conversion device is a device for converting electric energy into sound energy and comprises a basin frame and a magnetic assembly which are mutually connected, wherein the basin frame is connected with a vibrating diaphragm, a voice coil is positioned in a shell consisting of the basin frame and the magnetic assembly, one end of the voice coil is connected to the inner surface of the vibrating diaphragm, and the other end of the voice coil forms a free end and is inserted into the magnetic assembly.

However, the existing electroacoustic conversion devices have yet to be perfected.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides a bobbin voice coil and an electroacoustic conversion device, which can improve the performance of the electroacoustic conversion device.

In a first aspect, the embodiment of the utility model provides a skeleton voice coil loudspeaker voice coil includes:

a skeleton having a cylindrical structure;

at least two voice coils, the voice coil is around establishing the outside of skeleton, and electric isolation between the voice coil.

Preferably, the at least two voice coils include a first voice coil and a second voice coil, the first voice coil is wound on the first region of the framework, the second voice coil is wound on the second region of the framework, wherein the first region and the second region have a predetermined distance along the axial direction of the framework.

Preferably, the first voice coil and the second voice coil are electrically connected to different driving circuits, respectively.

Preferably, the first voice coil and the second voice coil are bonded through glue.

Preferably, the cross section of the framework is a circular ring, and the cross section of the voice coil is a circular ring; or

The cross section of skeleton is the quad ring, the cross section of voice coil loudspeaker voice coil is the quad ring.

In a second aspect, an embodiment of the present invention provides an electroacoustic conversion device, the electroacoustic conversion device includes:

a magnetic assembly forming a magnetic gap;

vibrating diaphragm;

a basin stand; and

the framework voice coil is partially arranged in the magnetic gap, and the upper end surface of the framework voice coil is connected with the vibrating diaphragm;

wherein, the skeleton voice coil includes:

a skeleton having a cylindrical structure;

Preferably, at least two voice coils include first voice coil and second voice coil, first voice coil is around establishing the first region of skeleton, the second voice coil is around establishing the second region of skeleton, wherein, first region with the second region is followed skeleton axial interval predetermined distance.

Preferably, the electroacoustic conversion device further includes a first drive circuit and a second drive circuit;

the first and second voice coils are electrically connected to the first and second driver circuits, respectively.

The embodiment of the utility model provides an in, through adopting two at least voice coil loudspeaker voice coils of skeleton stationary, make a plurality of voice coil loudspeaker voice coils along axial size to and along the convenient regulation of axial relative position. Therefore, the voice coils can be arranged at the position with the maximum magnetic flux in the magnetic gap, the sensitivity is improved, total harmonic distortion is restrained, and the real-time feedback effect of the electro-acoustic conversion device adopting the framework voice coil of the embodiment is better.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a cross-sectional view of an electroacoustic conversion device of a comparative example;

fig. 2 is a schematic view of a bobbin voice coil according to a first embodiment of the present invention;

fig. 3 is a schematic view of a bobbin voice coil according to a first embodiment of the present invention;

fig. 4 is a schematic view of a bobbin voice coil according to a first embodiment of the present invention;

fig. 5 is a cross-sectional view of an electroacoustic conversion device according to a second embodiment of the present invention;

fig. 6 is a schematic view of an electroacoustic conversion device according to a second embodiment of the present invention.

Description of reference numerals:

1 a first voice coil; 2 a second voice coil; 10 a bobbin voice coil; 11 a first voice coil; 12 a second voice coil; 13 a framework; 20, a basin stand; 30, vibrating diaphragm; 40 magnetic assembly.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present application, certain specific details are set forth in detail. It will be apparent to one skilled in the art that the present application may be practiced without these specific details. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the present application.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the application, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

When an element or layer is referred to as being "on," "engaged to," "connected to" or "coupled to" another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a similar manner. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Spatially relative terms, such as "inner," "outer," "below," "lower," "above," "upper," and the like, are used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative 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 example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.

Traditional electroacoustic conversion device generally sets up single voice coil, and two voice coil loudspeaker voice coil electroacoustic conversion device set up 2 voice coils, and 2 voice coils cooperate different drive circuit respectively to realize that 2 voice coils are driven by different drive circuit respectively. The effect of suppressing Total Harmonic Distortion (THD) is achieved. Fig. 1 is a schematic view of an electroacoustic conversion device of a comparative example. As shown in fig. 1, the voice coil of the electroacoustic transducer is composed of a first voice coil 1 and a second voice coil 2, and the lower surface of the first voice coil 1 is bonded to the upper surface of the second voice coil 2. However, the bonding strength of the first voice coil 1 and the second voice coil 2 in the comparative example cannot meet the increasing reliability requirements of the product, the assembly process is difficult to control, and the concentricity of the voice coil 1 and the second voice coil 2 is difficult to control. And the relative position of voice coil and magnetic gap is restricted by the voice coil size, and the size of first voice coil 1 and second voice coil 2 along the axial to and the interval of first voice coil 1 and second voice coil 2 along the axial can not better be adjusted.

In view of this, the embodiment of the present invention provides a bobbin voice coil and an electroacoustic conversion device using the same. The reliability of the framework voice coil is improved, and then the sound effect of the electroacoustic conversion device using the framework voice coil is improved.

The bobbin voice coil 10 is constituted by a bobbin 13 and a voice coil. Make voice coil loudspeaker voice coil and vibrating diaphragm 30 connect through skeleton 13, can improve the stability that voice coil loudspeaker voice coil and vibrating diaphragm 30 are connected, reduce the risk of voice coil loudspeaker voice coil lead wire broken string, can improve electro-acoustic conversion equipment's reliability.

In this embodiment, the electroacoustic conversion device may be a miniature speaker, such as a speaker of a hands-free phone or a speaker or receiver within a smart phone, or other similar compact electronic devices, such as a laptop, notebook or tablet computer. The electro-acoustic conversion means may be enclosed or integrated within the housing or casing of the apparatus in which it is located.

In this embodiment, an electroacoustic conversion device having a rectangular parallelepiped shape is described as an example, and it should be understood that the shape of the electroacoustic conversion device may be different shapes such as a sphere, a cylinder, a cube, and an irregular shape, and is not limited herein and may be freely selected according to an application scenario of the electroacoustic conversion device.

Fig. 2 to 4 are schematic cross-sectional views of a bobbin voice coil 10 according to a first embodiment of the present invention. The utility model discloses a first embodiment skeleton voice coil loudspeaker voice coil 10 includes: a bobbin 13 and at least two voice coils.

The skeleton 13 has a cylindrical structure; the bobbin 13 is used to support the voice coil and may be made of kraft paper, asbestos paper, Nomex, polyimide, aluminum foil, copper foil, glass fiber, or the like.

The voice coil is wound on the outer side of the framework 13, and the voice coil is electrically isolated.

Further, the bobbin voice coil 10 includes two voice coils. Including first voice coil 11 and second voice coil 12, first voice coil 11 is around establishing the first region of skeleton 13, second voice coil 12 is around establishing the second region of skeleton 13, wherein, the first region with the second region is followed skeleton 13 axial has predetermined distance. The number of turns of the first voice coil 11 and the second voice coil 12 may be the same or different, and the dimensions of the first voice coil 11 and the second voice coil 12 in the axial direction may be the same or different.

In an alternative implementation, the cross section of the bobbin 13 is a circular ring, and the cross section of the voice coil is a circular ring. Specifically, both the voice coil and the bobbin 13 may be of a cylindrical structure or a tubular structure. The cross section of the voice coil 10 is a section perpendicular to the central axis of the voice coil 10. The section of the voice coil can be a circular ring, an elliptical ring, a round-corner rectangular ring and the like.

In another alternative implementation manner, the cross section of the framework 13 is a square ring, and the cross section of the voice coil is a square ring.

In other alternative implementations, the cross-section of the bobbin 13 and the cross-section of the voice coil may also be irregular annular.

The inner walls of the first voice coil 11 and the second voice coil 12 are bonded to the outer wall of the bobbin 13. Specifically, the first voice coil 11 and the second voice coil 12 may be directly wound on the outer wall of the bobbin 13, and during the winding process, glue is coated on the outer wall of the bobbin 13, and an adhesive layer is formed between the voice coil and the bobbin 13, so that the first voice coil 11 and the bobbin 13, and the second voice coil 12 and the bobbin 13 are fixedly connected. Because the inner wall areas of the first voice coil 11 and the second voice coil 12 are larger, the bonding force between the first voice coil 11 and the framework 13 and between the second voice coil 12 and the framework 13 in the embodiment is larger, and the situation that the first voice coil 1 and the second voice coil 2 cannot be reliably connected in the comparative example cannot occur.

In other optional implementation manners, the first voice coil 11 and the second voice coil 12 may be formed by winding alcohol-soluble wire or hot-melt wire, and then the first voice coil 11 and the second voice coil 12 are sequentially adhered to the outer wall of the bobbin 13, so that the first voice coil 11 and the bobbin 13, and the second voice coil 12 and the bobbin 13 are fixedly connected. And set up glue between first voice coil 11 and second voice coil 12, make first voice coil 11 with bond through glue between the second voice coil 12, can further improve the steadiness that first voice coil 11 and second voice coil 12 are connected.

Further, as shown in fig. 2, the distance between the first region and the second region is 0, that is, the end surfaces of the first voice coil and the second voice coil contact each other.

Further, as shown in fig. 3, the distance between the first region and the second region is greater than 0, that is, the first voice coil and the second voice coil are spaced apart by a certain distance.

By fixing the first voice coil 11 and the second voice coil 12 by using the bobbin 13, the size of the first voice coil 11 and the second voice coil 12 in the axial direction and the relative position in the axial direction are easily adjusted. Therefore, the first voice coil 11 and the second voice coil 12 can be disposed at the positions where the magnetic flux is the maximum in the magnetic gap, so that the sensitivity is improved, the total harmonic distortion is suppressed, and the real-time feedback effect of the electroacoustic conversion device using the bobbin voice coil 10 of the present embodiment is improved.

Further, the first region and the second region may also partially overlap. Specifically, the first coil may be adhered to the first area of the bobbin 13, and then the second coil may be partially wound around the first coil.

Thus, the height dimension of the bobbin voice coil 10 can be shortened so that both voice coils are positioned in the magnetic gap.

In this embodiment, the first voice coil and the second voice coil are fixed by the framework, so that the size of the first voice coil and the second voice coil along the axial direction and the relative position along the axial direction are convenient to adjust.

Further, as shown in fig. 4, the plurality of voice coils includes 3 voice coils. The bobbin voice coil 10 includes a bobbin 13, and a first voice coil 11, a second voice coil 12, and a third voice coil 13 wound around the bobbin 13 in this order. The first voice coil 11, the second voice coil 12, and the third voice coil 13 have a predetermined distance therebetween. The above-described bobbin voice coil 10 can be suitably used in an electroacoustic conversion device having three driving circuits.

Fig. 5 is a sectional view of an electroacoustic conversion device according to a second embodiment of the present invention. The electroacoustic conversion device of the present embodiment includes: including a bobbin voice coil 10, a frame 20, a diaphragm 30, and a magnetic assembly 40.

The shapes and sizes of the bobbin voice coil 10, the frame 20, the diaphragm 30, and the magnetic member 40 may be adaptively adjusted according to the shape and size of the electro-acoustic transducer device.

The bobbin voice coil 10 in this embodiment can refer to the bobbin voice coil 10 described in the first embodiment of the present invention, and is not described herein again.

The voice coil of the bobbin voice coil 10 is a coil through which a current flows, and vibrates in a magnetic field upon receiving a current signal.

The frame 20 is a supporting member of the electroacoustic conversion device, and after various functional components of the electroacoustic conversion device are integrated, the frame 20 may be mounted to an electronic device to which the electroacoustic conversion device is applied.

The magnet assembly 40 is fixedly attached to the frame 20, the magnet assembly 40 having an annular gap matching the shape of the voice coil, and a magnetic field, also referred to as a magnetic gap, is formed in the gap. The magnetic assembly 40 may be fixedly attached to the floor of the basin stand 20.

The center axis of the bobbin voice coil 10 is substantially perpendicular to the bottom surface of the frame 20. The bobbin 13 of the bobbin voice coil 10 is connected to the diaphragm 30. Specifically, the upper end surface of the bobbin 13 is bonded to the lower surface of the diaphragm 3030. The voice coil of the bobbin voice coil 10 is located in the magnetic gap. When a current-carrying conductor passes through a magnetic field, the current-carrying conductor is subjected to an ampere force, the direction of the ampere force accords with the Fleming left-hand rule, the directions of the ampere force and the current and the magnetic field are mutually vertical, and the magnitude of the ampere force is in direct proportion to the current, the length of a lead and the magnetic induction intensity. When the voice coil inputs alternating audio current, the voice coil becomes a current-carrying conductor and is subjected to an alternating driving force to generate alternating motion, so that the vibrating diaphragm 30 is driven to vibrate, and air is repeatedly driven to produce sound.

In an alternative implementation, as shown in fig. 5 and 6, the bobbin voice coil 10 includes a first voice coil 11 and a second voice coil 12, and the electroacoustic conversion device further includes: a first drive circuit (not shown) and a second drive circuit (not shown).

The first voice coil 11 and the second voice coil 12 are electrically connected to the first driving circuit and the second driving circuit, respectively.

The embodiment of the utility model provides an in, through the two voice coils that adopt to take the skeleton in electro-acoustic transducer, the voice coil loudspeaker voice coil all conveniently adjusts in the size and the position of vertical direction, makes the voice coil loudspeaker voice coil setting magnetic flux maximum position in the magnetic gap, promotes sensitivity to it is better to restrain total harmonic distortion, real-time feedback's effect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A bobbin voice coil (10), the bobbin voice coil (10) comprising:

a skeleton (13) having a tubular structure;

and the voice coils are wound on the outer side of the framework (13) and are electrically isolated.

2. The voice coil bobbin (10) according to claim 1, wherein the at least two voice coils comprise a first voice coil (11) and a second voice coil (12), the first voice coil (11) is wound around a first region of the bobbin (13), and the second voice coil (12) is wound around a second region of the bobbin (13), wherein the first region and the second region have a predetermined distance along an axial direction of the bobbin (13).

3. The voice coil former (10) according to claim 2, wherein the first voice coil (11) and the second voice coil (12) are electrically connected to different driving circuits, respectively.

4. A bobbin voice coil (10) according to claim 2, wherein the first voice coil (11) and the second voice coil (12) are bonded together by glue.

5. A former voice coil (10) according to claim 1, characterised in that the former (13) is a circular ring in cross-section and the voice coil is a circular ring in cross-section; or

The cross section of skeleton (13) is the quad ring, the cross section of voice coil loudspeaker voice coil is the quad ring.

6. An electro-acoustic conversion device, characterized by comprising:

a magnetic assembly (40) forming a magnetic gap;

a diaphragm (30);

a basin stand (20); and

the framework voice coil (10), the framework voice coil (10) is partially arranged in the magnetic gap, and the upper end surface of the framework voice coil (10) is connected with the vibrating diaphragm (30);

wherein the bobbin voice coil (10) comprises:

a skeleton (13) having a tubular structure;

7. The electroacoustic conversion device of claim 6, wherein the at least two voice coils include a first voice coil (11) and a second voice coil (12), the first voice coil (11) being wound around a first region of the bobbin (13), the second voice coil (12) being wound around a second region of the bobbin (13), wherein the first region and the second region have a predetermined distance in an axial direction of the bobbin (13).

8. The electro-acoustic conversion device according to claim 7, characterized in that the electro-acoustic conversion device further comprises a first drive circuit and a second drive circuit;

the first voice coil (11) and the second voice coil (12) are electrically connected to the first drive circuit and the second drive circuit, respectively.

9. The electroacoustic conversion device of claim 7, wherein the first voice coil (11) and the second voice coil (12) are bonded by glue.

10. The electroacoustic conversion device of claim 6 wherein the bobbin (13) has a circular ring-shaped cross section and the voice coil has a circular ring-shaped cross section; or