CN212413417U - Electroacoustic conversion device and electronic equipment - Google Patents

Abstract

The embodiment of the utility model provides an electroacoustic conversion equipment and electronic equipment. Electro-acoustic conversion equipment includes central magnet, vibrating diaphragm, skeleton and voice coil loudspeaker voice coil, and the skeleton up end is connected vibrating diaphragm, voice coil loudspeaker voice coil are fixed in on the skeleton and downward protrusion in the lower terminal surface of skeleton, voice coil loudspeaker voice coil encircle central magnet, voice coil loudspeaker voice coil can be more close central magnet. The utility model discloses electroacoustic conversion device and electronic equipment can reduce the size of skeleton, and the certain degree reduces electroacoustic conversion device's weight, improves the magnetic induction intensity of voice coil loudspeaker voice coil position, promotes electroacoustic conversion device's sensitivity, and the use that improves electroacoustic conversion device is experienced. Meanwhile, the material of the framework can be saved, and the cost can be reduced.

Description

Electroacoustic conversion device and electronic equipment

Technical Field

The utility model relates to an electronic product technical field especially relates to an electroacoustic conversion device and electronic equipment.

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 an electroacoustic conversion device, which can improve the performance of the electroacoustic conversion device.

In a first aspect, an embodiment of the present invention provides an electroacoustic conversion device, an embodiment of the present invention is a device including:

a central magnet;

vibrating diaphragm;

the upper end surface of the framework is connected with the vibrating diaphragm;

the voice coil is fixed on the framework and protrudes downwards from the lower end face of the framework;

wherein the voice coil surrounds the central magnet.

Preferably, the voice coil is wound on the outer wall of the lower end of the framework and partially protrudes out of the lower end face of the framework.

Preferably, the inner diameter of the part of the voice coil protruding from the lower end face of the bobbin is smaller than or equal to the outer diameter of the bobbin.

Preferably, the voice coil is connected to a lower end surface of the bobbin.

Preferably, the inner diameter of the voice coil is smaller than or equal to the outer diameter of the bobbin.

Preferably, the height of the skeleton is less than or equal to the distance from the lower surface of the diaphragm to the upper surface of the central magnet.

Preferably, the electroacoustic conversion device further includes:

a side magnet located outside of the central magnet;

wherein the voice coil is located between the center magnet and the side magnet.

Preferably, the cross section of the central magnet is a rounded rectangle; the cross section of the voice coil is a round-corner rectangular ring; or

The cross section of the central magnet is circular, and the cross section of the voice coil is a circular ring.

Preferably, the voice coil is wound of one voice coil wire or a plurality of voice coil wires.

In a second aspect, embodiments of the present invention provide an electronic device, which includes the electroacoustic conversion device according to the first aspect.

The embodiment of the utility model provides an in, make the voice coil loudspeaker voice coil be fixed in on the skeleton and downward protrusion in the lower terminal surface of skeleton, the voice coil loudspeaker voice coil can more be close to central magnet to reduce the size of skeleton, improve the magnetic induction strength of voice coil loudspeaker voice coil position. The weight of the electroacoustic conversion device can be reduced to a certain degree, the sensitivity of the electroacoustic conversion device is improved, and the use experience of the electroacoustic conversion device is improved. Meanwhile, the material of the framework can be saved, and the cost can be reduced.

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 schematic view of an electroacoustic conversion device of a comparative example;

fig. 2 is a cross-sectional view of an electroacoustic conversion device of a comparative example;

fig. 3 is a schematic view of an electroacoustic conversion device according to a first embodiment of the present invention;

fig. 4 is a cross-sectional view of an electroacoustic conversion device according to a first embodiment of the present invention;

fig. 5 is a schematic view of an electroacoustic conversion device according to a first embodiment of the present invention;

fig. 6 is a cross-sectional view of an electroacoustic conversion device according to a first embodiment of the present invention;

fig. 7 is a schematic diagram of an electronic device according to a second embodiment of the present invention.

Description of reference numerals:

1 a voice coil; 2, a framework; 3 vibrating diaphragm; 4 a central magnet; 10 voice coils; 11 a first portion; 12 a second portion; 20, a basin stand; 30, vibrating diaphragm; 40 of a framework; a 50 center magnet; a 60-sided magnet; 70 magnetic gap; 100 an electroacoustic conversion device; 1000 electronic device.

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.

The framework voice coil is a structure formed by a framework and a voice coil. Make voice coil loudspeaker voice coil and vibrating diaphragm connect through the skeleton, can improve the stability that voice coil loudspeaker voice coil and vibrating diaphragm are connected, reduce the risk of voice coil loudspeaker voice coil lead wire broken string, can improve electroacoustic conversion device's reliability.

Fig. 1 is a schematic diagram of an electroacoustic conversion device of a comparative example. Fig. 2 is a sectional view of an electroacoustic conversion device of a comparative example. Fig. 2 is a cross-sectional view taken along line AA' in fig. 1. As shown in fig. 1 and 2. The structure of the bobbin voice coil of the comparative example is that the voice coil 1 is wound on the outer side of the bobbin 2, the first end of the bobbin 2 is bonded to the diaphragm 3 or other vibrating structure, and the surface of the other end slightly exceeds the surface of the same side of the voice coil 1. In the comparative example, since the bobbin 2 has a certain thickness, the distance from the voice coil 1 to the center magnet 4 is large relative to the voice coil without the bobbin. This results in a relatively low sensitivity of the loudspeaker. And too high skeleton design can bring extra weight, is unfavorable for the promotion of electroacoustic conversion device performance.

In view of this, a first embodiment of the present invention provides an electroacoustic conversion device. To improve the sensitivity of the electroacoustic conversion device.

A first embodiment of the present invention provides an electroacoustic conversion device 100, wherein the electroacoustic conversion device 100 may be a micro-speaker, such as a speaker or a receiver in a hands-free phone or a smart phone, or other similar compact electronic devices, such as a laptop, a notebook, or a tablet. The electro-acoustic conversion device 100 may be enclosed or integrated within the housing or shell of the apparatus in which it is located.

In the present embodiment, the electroacoustic conversion device 100 having an external shape of a rectangular parallelepiped is described as an example, and it should be understood that the external shape of the electroacoustic conversion device 100 may also have 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 100.

Fig. 3 is a schematic view of an electroacoustic conversion device according to a first embodiment of the present invention. Fig. 4 is a cross-sectional view of an electroacoustic conversion device according to a first embodiment of the present invention. Specifically, fig. 4 is a cross-sectional view taken along line BB' in fig. 3. As shown in fig. 3 and 4, the electroacoustic conversion device 100 may include a voice coil 10, a frame 20, a diaphragm 30, a bobbin 40, a center magnet 50, and a side magnet 60.

Wherein, the shapes and sizes of the voice coil 10, the frame 20, the diaphragm 30, the bobbin 40, the center magnet 50, and the side magnet 60 may be adaptively adjusted according to the shape and size of the electro-acoustic transducer.

The voice coil 10 is a coil through which a current flows, and vibrates in a magnetic field upon receiving a current signal. The voice coil 10 has a ring-shaped cross section. Specifically, the voice coil 10 may have a tubular structure, and the cross section of the voice coil 10 is a section perpendicular to a central axis of the voice coil 10. The cross section of the tubular structure can be a circular ring, an elliptical ring, a round-corner rectangular ring and the like. The central axis of the voice coil 10 is disposed perpendicular to the surface of the central magnet 50. The voice coil 10 surrounds the central magnet 50.

The voice coil (10) can be formed by winding one voice coil wire or a plurality of voice coil wires.

The voice coil 10 is fixed on the bobbin 40 and protrudes downward from the lower end surface of the bobbin 40.

As shown in fig. 4, in an alternative implementation manner, a portion of the voice coil 10 protruding out of the lower end surface of the bobbin 40 is a first portion 11 of the voice coil 10, and a portion of the voice coil 10 overlapping with the bobbin 40 is a second portion 12 of the voice coil. The second portion 12 of the voice coil 10 is wound around the outer wall of the lower end of the bobbin 40, and specifically, the outer wall of the bobbin 40 is bonded to the inner wall of the second portion 12 of the voice coil 10. The first portion 11 of the voice coil 10 surrounds the central magnet 50, and the inner diameter of the first portion 11 of the voice coil 10 is smaller than or equal to the outer diameter of the bobbin 40.

In the present embodiment, the height of the bobbin 40 is shortened as compared with the comparative example, and the whole is above the center magnet 50. The inner diameter of the first portion 11 of the voice coil 10 is smaller than or equal to the outer diameter of the bobbin 40, and the gap between the first portion 11 of the voice coil 10 and the central magnet 50 is reduced, so that the magnetic induction B at the position of the coil is improved, and the improvement of the sensitivity of the loudspeaker is facilitated. Meanwhile, the size of the frame 40 is reduced, so that the weight of the electroacoustic conversion device 100 can be reduced to a certain extent, and the use experience of the electroacoustic conversion device 100 is improved. Meanwhile, the material of the framework 40 can be saved, and the cost can be reduced.

In another alternative implementation, as shown in fig. 6, the voice coil 10 is connected to the lower end surface of the bobbin 40. Specifically, the lower end surface of the bobbin 40 and the upper end surface of the voice coil 10 are bonded. A special glue may be used to form a glue layer between the upper end surface of the voice coil 10 and the lower end surface of the bobbin 40, so that the voice coil 10 and the bobbin 40 are fixedly connected.

The voice coil 10 surrounds the central magnet 50. The inner diameter of the voice coil 10 is smaller than or equal to the outer diameter of the bobbin 40, so that the gap between the voice coil 10 and the central magnet 50 is reduced, the magnetic induction intensity B at the position of the coil is improved, and the improvement of the sensitivity of the loudspeaker is facilitated.

In addition, on the basis of the above implementation, the distance between the diaphragm 30 and the central magnet 50 may also be reduced. The height dimensions of the voice coil 10 and the bobbin 40 are further reduced. The integration of the electroacoustic conversion device 100 can be improved, and the materials of the bobbin 40 and the voice coil 10 can be further saved, and the cost can be reduced. Therefore, the embodiment of the present invention can achieve the effects of improving the sensitivity and the integration of the electroacoustic conversion device 100 and reducing the weight of the electroacoustic conversion device 100. The comprehensive performance of the electroacoustic conversion device 100 can be improved, and the user experience can be improved.

The frame 20 is a supporting member of the electroacoustic conversion device 100, and various functional components of the electroacoustic conversion device 100 may be integrated and then mounted on the electronic apparatus 1000 to which the electroacoustic conversion device 100 is applied through the frame 20. The frame 20 may include a bottom plate and sidewalls that are vertically disposed on the bottom plate.

The center magnet 50 and the side magnets 60 are used to generate a magnetic field. Specifically, the side magnets 60 are positioned outside of the center magnet 50, and the area between the side magnets 60 and the center magnet 50 forms a magnetic gap 70. A magnetic field is formed in the magnetic gap 70. The central magnet 50 has a rectangular or circular cross-section. Specifically, the central magnet 50 and the voice coil 10 are similar in shape and substantially concentric with the voice coil 10. The center magnet 50 and the edge magnets 60 can be fixedly attached to the bottom plate of the frame 20. In the present embodiment, the cross section of the center magnet 50 is a rounded rectangle; the cross section of the voice coil 10 is a round-corner rectangular ring.

The voice coil 10 is located between the center magnet 50 and the side magnets 60. 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 10 inputs alternating audio current, the voice coil 10 becomes a current-carrying conductor and is subjected to an alternating driving force to generate alternating motion, so as to drive the diaphragm 30 to vibrate and repeatedly drive air to generate sound.

The bobbin 40 is used for connecting the voice coil 10 and the diaphragm 30, specifically, the upper end surface of the bobbin 40 is connected with the lower surface of the diaphragm 30, and the lower end of the bobbin 40 is connected with the voice coil 10. In an alternative implementation, the height of the skeleton 40 is less than or equal to the distance from the lower surface of the diaphragm 30 to the upper surface of the central magnet 50.

Specifically, the upper end surface of the skeleton 40 is bonded to the lower surface of the diaphragm 30. The height of the skeleton 40 is less than or equal to the distance from the lower surface of the diaphragm 30 to the upper surface of the central magnet 50. The bobbin 40 is located between the central magnet 50 and the diaphragm 30, and both ends are connected to the diaphragm 30 and the voice coil 10, respectively. The frame is used for supporting the voice coil and can be composed of kraft paper, asbestos paper, Nomex, polyimide, aluminum foil, copper foil, glass fiber and the like.

In the embodiment of the present invention, the two ends of the bobbin 40 are connected to the diaphragm 30 and the voice coil 10, respectively, and are located between the central magnet 50 and the diaphragm 30. I.e., having the armature 40 entirely above the central magnet 50. The region where the bobbin 40 and voice coil 10 are connected is also above the central magnet 50. The inner diameter of the voice coil 10 is smaller than or equal to the outer diameter of the bobbin 40, so that the gap between the voice coil 10 and the center magnet 50 in the magnetic gap 70 can be reduced. Since the magnetic induction intensity at the position of the voice coil 10 is stronger as the center magnet 50 is closer, the magnetic induction intensity B at the position of the coil can be increased, which contributes to the improvement of the sensitivity of the electroacoustic conversion device 100.

In the embodiment of the present invention, the voice coil 10 is fixed on the bobbin 40 and protrudes downward from the lower end surface of the bobbin 40, so as to reduce the size of the bobbin 40. The weight of the electroacoustic conversion device 100 can be reduced to some extent, and the use experience of the electroacoustic conversion device 100 can be improved. Meanwhile, the material of the framework 40 can be saved, and the cost can be reduced.

The second embodiment of the present invention provides an electronic device 1000, wherein the electronic device 1000 includes the electroacoustic conversion device 100 according to the first embodiment.

Specifically, the electroacoustic conversion device 100 may be a micro-speaker. In an alternative implementation, as shown in fig. 7, the electronic device 1000 may be a mobile phone including a micro-speaker. In other alternative implementations, the electronic device 1000 may also be a speakerphone or a smartphone, or other similar compact electronic device 1000, such as a laptop, notebook, or tablet. The electro-acoustic conversion device 100 is enclosed or integrated within a housing or casing of the electronic device 1000.

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 (10)

1. An electro-acoustic conversion device, characterized in that the electro-acoustic conversion device (100) comprises:

a central magnet (50);

a diaphragm (30);

the upper end surface of the framework (40) is connected with the vibrating diaphragm (30);

the voice coil (10), the said voice coil (10) is fixed to said skeleton (40) and protrudes downward from the lower end surface of the said skeleton (40);

wherein the voice coil (10) surrounds the central magnet (50).

2. The electroacoustic conversion device as claimed in claim 1, wherein the voice coil (10) is wound around the outer wall of the lower end of the bobbin (40) and partially protrudes from the lower end surface of the bobbin (40).

3. The electroacoustic conversion device as claimed in claim 2, wherein an inner diameter of a portion of the voice coil (10) protruding from the lower end surface of the bobbin (40) is equal to or smaller than an outer diameter of the bobbin (40).

4. The electroacoustic conversion device as claimed in claim 1, wherein the voice coil (10) is attached to a lower end face of the bobbin (40).

5. The electroacoustic conversion device of claim 4 wherein the voice coil (10) has an inner diameter smaller than or equal to an outer diameter of the bobbin (40).

6. The electroacoustic conversion device of claim 1, wherein the height of the skeleton (40) is smaller than or equal to the distance from the lower surface of the diaphragm (30) to the upper surface of the central magnet (50).

7. The electro-acoustic conversion device according to claim 1, characterized by further comprising:

a side magnet (60), the side magnet (60) being located outside the central magnet (50);

wherein the voice coil (10) is located between the center magnet (50) and the side magnet (60).

8. The electroacoustic conversion device of claim 1, wherein the center magnet (50) has a cross section of a rounded rectangle; the cross section of the voice coil (10) is a round-corner rectangular ring; or

The cross section of the central magnet (50) is circular, and the cross section of the voice coil (10) is a circular ring.

9. Electro-acoustic conversion device according to any one of claims 1-8, characterised in that the voice coil (10) is wound from one voice coil wire or from a plurality of voice coil wires.

10. An electronic device, characterized in that the electronic device (1000) comprises an electro-acoustic conversion arrangement according to claim 9.

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