CN107222818B

CN107222818B - Acoustic-electric conversion device and audio equipment

Info

Publication number: CN107222818B
Application number: CN201710570504.0A
Authority: CN
Inventors: 张亚辉; S·阿尔巴赫里
Original assignee: Roche Ipc Malaysia Sdn Bhd
Current assignee: Roche Ipc Malaysia Sdn Bhd
Priority date: 2017-07-13
Filing date: 2017-07-13
Publication date: 2020-05-08
Anticipated expiration: 2037-07-13
Also published as: CN107222818A

Abstract

The invention discloses an acoustoelectric conversion device and audio equipment, wherein the acoustoelectric conversion device comprises: a housing having opposing top and bottom walls; and an armature, a magnetic component, an armature support member, and a coil located within the housing; the armature supporting member supports the armature between the coil and the magnetic component; the coil has a magnetic core disposed within the coil channel; the armature extends from the magnetic core to the magnetic component, the armature being supported by the armature support; wherein the magnetic component forms a gap through which the armature passes; the length direction of the coil is not parallel to the direction in which the armature passes through the gap. The sound-electricity conversion device and the audio equipment provided by the invention are beneficial to improving the assembly efficiency.

Description

Acoustic-electric conversion device and audio equipment

Technical Field

The invention relates to the field of acoustics, in particular to an acoustoelectric conversion device and audio equipment.

Background

Various types of microphones and receivers (transducers) have been used for many years. In these devices, different electrical components are mounted together in a housing or assembly. For example, the receiver generally includes coils, magnets, armatures, and other components, and these components are mounted within a receiver housing, which collectively form a magnetic path. Other types of acoustic devices may include other types of components. Wherein the transducer may be used in a variety of applications such as hearing aids or earphones. These devices may also be used in other applications such as wearable devices, personal computers or cellular phones.

As described above, the conventional receiver structure is shown in fig. 1, and the receiver of this structure is inefficient in assembling when automated assembly is performed by a robot.

Disclosure of Invention

Referring to fig. 1, a coil (coil) of the conventional receiver is disposed parallel to a bottom plate of a housing (not shown), and an armature (reed) passes through a gap between a coil cavity and a magnet, so that the armature needs to be inserted into the coil cavity from a horizontal direction (an armature extending direction) when each component is mounted, and a position of the armature in the coil cavity needs to be ensured, which causes a robot to ensure not only accuracy in a horizontal direction of the coil and the armature but also accuracy in a vertical direction when the robot is automatically assembled, which requires high accuracy in the automatic assembly, thereby resulting in low assembly efficiency.

In addition, when the conventional receiver is assembled, the coil and the armature need to be horizontally placed in the receiver housing, and other components (such as the magnet, the yoke, the diaphragm and the like) can be vertically placed in the housing, so that the assembly process is complicated during assembly, which also affects the assembly efficiency.

In order to solve the above technical problem, the present application provides an acoustic-electric conversion apparatus, including:

a housing having opposing top and bottom walls; and

an armature, a magnetic component, an armature support member, and a coil located within the housing;

the armature supporting member supports the armature between the coil and the magnetic component; the coil has a magnetic core disposed within the coil channel; the armature extends from the magnetic core to the magnetic component, the armature being supported by the armature support;

wherein the magnetic component forms a gap through which the armature passes; the length direction of the coil is not parallel to the direction in which the armature passes through the gap.

An acoustic-electric conversion apparatus comprising:

a housing comprising a top wall and a bottom wall;

an armature, a magnetic component, and a coil located within the housing; the coil has a magnetic core disposed within the coil passage; wherein the armature extends from the magnetic core and through a gap formed by the magnetic component;

the armature bends at least twice when extending from one end far away from the gap to one end close to the gap; the length direction of the coil is not parallel to the direction in which the armature passes through the gap.

Preferably, the length direction of the coil is perpendicular to the direction in which the armature passes through the gap.

Preferably, an end face of the coil is directly or indirectly connected to a bottom wall of the housing.

Preferably, the end of the magnetic core is directly or indirectly connected to the bottom wall of the housing.

Preferably, the armature and the magnetic core are of an integral structure having three bent portions.

Preferably, the magnetic core extends through a bottom wall of the housing and is fixedly connected to an outer surface of the bottom wall.

Preferably, the armature and the magnetic core are integrally formed to have four bent portions.

Preferably, the armature is directly connected to the bottom wall, and the armature, the magnetic core and a part of the bottom wall form a magnetic path.

Preferably, the armature and the magnetic core are of an integrally molded structure.

Preferably, the acoustic-electric conversion apparatus includes: an armature support member within the housing between the coil and the magnetic component;

the armature support member supports the armature, and a magnetic permeability of the armature support member is at least 1000 times less than a magnetic permeability of the armature.

Preferably, the magnetic permeability of the armature support member is at least 1000 times less than the magnetic permeability of the armature.

Preferably, the armature supporting member is made of a non-magnetic conductive material.

Preferably, a bending angle of each bending portion of the armature is 90 degrees, and the bending portion is rounded.

Preferably, the housing has a side wall between the top wall and the bottom wall; an opening is formed in the side wall; and a PCB arranged on the opening is fixedly connected to the surface of the coil.

Preferably, the housing has a projection that positions the coil in the housing and prevents movement of the coil and the PCB board.

Preferably, the positioning protrusion is formed by press molding.

Preferably, the magnetic core and the armature are of a separate structure.

An audio device comprising an acousto-electric conversion arrangement as claimed in any one of the preceding claims.

Preferably, the audio device is at least one of an earphone and a hearing aid.

In the invention, the length direction of the coil of the sound-electricity conversion device is not parallel to the direction of the armature penetrating through the gap, so that the arrangement can be carried out without ensuring the installation precision between the coil and the armature during installation and only a magnetic passage can be formed between the armature and the coil, and thus, the horizontal and vertical accurate control is not required during the installation of the coil, thereby being beneficial to the improvement of the assembly efficiency.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

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 inventive exercise.

FIG. 1 is an exploded view of a motor of a prior art receiver;

FIG. 2 is a cross-sectional view of an acousto-electric conversion device according to an embodiment of the present application;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a cross-sectional view of an acousto-electric conversion device according to another embodiment of the present application;

fig. 6 is a cross-sectional view of an acoustic-electric conversion device according to another embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 2 to 4, an acoustic-electric conversion apparatus according to an embodiment of the present invention includes: a housing 1, said housing 1 having a top wall 11 and a bottom wall 12; and an armature 2, a magnetic member 3, and a coil 4 located within the housing 1; the magnetic member 3 is formed with a gap 31; the armature 2 passes through the gap 31; the length direction of the coil 4 is not parallel to the direction in which the armature 2 passes through the gap 31.

In the present embodiment, the housing 1 has a top wall 11 and a bottom wall 12, wherein the top wall 11 and the bottom wall 12 are disposed opposite to each other. As shown in fig. 2, the casing 1 may be a rectangular parallelepiped, and a side wall may be provided between the top wall 11 and the bottom wall 12, so as to form a rectangular parallelepiped accommodating cavity, thereby accommodating the coil 4, the armature 2, the magnetic member 3, and other motor components.

Specifically, the top wall 11 and the bottom wall 12 are two side walls with a larger area of the cuboid-shaped casing 1, the casing 1 can also contain the vibrating diaphragm 9, a front cavity can be formed between the vibrating diaphragm 9 and the top wall 11, a rear cavity can be formed between the vibrating diaphragm 9 and the bottom wall 12, and the motor assembly can be contained in the rear cavity.

In order to supply current to the coil 4, the housing 1 may be provided with a PCB board 8 electrically connected to the coil 4. In order to install the PCB board 8, the housing 1 is provided with an opening 14 for disposing the PCB board 8, as shown in fig. 2 and 3, the opening 14 may be shaped to match the PCB board 8, the PCB board 8 is fixedly connected to the surface of the coil 4, and the PCB board 8 may close the opening 14 so that the housing 1 forms a closed cavity.

To facilitate positioning of the PCB board 8, to facilitate mounting of the PCB and coil 4, the housing 1 has a protrusion 10 which positions the coil 4 in the housing 1 and prevents movement of the coil 4 and PCB board 8. The protrusion 10 protrudes from the inner surface of the housing 1, and its specific position may be located at a distance of one PCB board 8 thickness from the opening 14 of the housing 1. As shown in fig. 2, the protrusion 10 may be limited by the protrusion 10 when the PCB 8 passes through (at least partially) the opening 14 to enter the housing 1 for installation, so as to know that the PCB 8 is installed at the correct position, and since the PCB 8 is fixedly connected to the coil 4, the accurate positioning of the coil 4 can be ensured. At the same time, due to the existence of the (positioning) protrusion 10, the movement of the coil 4 and the PCB board 8 is prevented, and the stability of the whole structure is improved.

In the present embodiment, the protrusion 10 may be a separate element connected to the inner wall of the housing 1, or may be a protrusion 10 structure integrated with the inner surface of the housing 1, and preferably, the positioning protrusion 10 is integrated with the housing 1 by stamping. Specifically, the bottom wall 12 and the top wall 11 have two opposite long side walls 13 and two opposite short side walls, an opening 14 is provided on one short side wall, and the inner surfaces of the two opposite long side walls 13 are stamped and formed with the positioning protrusion 10 at a position close to the opening 14.

In the present embodiment, the coil 4 has a channel 41 (which may also be referred to as a lumen); the channel 41 runs through the coil 4 in the longitudinal direction of the coil 4. Preferably, the channel 41 is a cylindrical channel 41. The coil 4 passage 41 has a magnetic core 20 (also referred to as a bobbin) therein, and the magnetic core 20 may be formed by inserting the armature 2 into the coil 4 passage 41, in which case the magnetic core 20 and the armature 2 are integrated. As shown in fig. 5, the magnetic core 20 and the armature 2 are of a separate structure, and are connected (e.g., welded) to each other to transmit the magnetic induction line (or magnetic field). The length direction of the coil 4 is also the length direction of the upper channel 41, and is also the length direction of the magnetic core 20.

In the present embodiment, the magnetic member 3 is formed with a gap 31 through which a part of the armature 2 is disposed (or passes), specifically, the magnetic member 3 is two magnets 3a having a regular structure (for example, a square shape or a rectangular parallelepiped shape), and the two magnets 3a may be disposed opposite to each other under the support of a support structure (also referred to as a yoke 6) and form the gap 31 therebetween.

When the sound-electricity conversion device in this embodiment generates sound, the coil 4 of the motor receives an excitation signal (the excitation signal is usually transmitted in the form of current), and the armature 2 moves under the combined action of the magnetic component 3, and the armature 2 can drive the diaphragm 9 to vibrate through the connecting pin 7, so as to form sound, and can output the sound through the sound output port of the housing 1.

Specifically, as shown in fig. 3, the coil 4 may have a channel 41 extending through the length thereof, and the channel 41 may be provided with a magnetic core 20 therein to form a magnetic circuit with the armature 2. The coil 4 can be supplied with an electric current (excitation signal), which generates an alternating magnetic field in the armature 2 when the electric current flows through the coil 4, and the armature 2 then moves the connecting pin 7 under the action of the magnetic field formed by the magnetic part 3, thereby generating the desired sound.

Of course, the above examples are merely examples in which the present embodiment is applied to a hearing aid, and the present application is not limited thereto, and for example, the electroacoustic transducer device in the present embodiment may be applied to an earphone, a microphone, and the like.

In this embodiment, the length direction of the coil 4 and the direction in which the armature 2 passes through the gap 31 are not parallel, so that the mounting accuracy between the coil 4 and the armature 2 is not required to be ensured when the coil 4 is mounted, and only the magnetic path between the armature 2 and the coil 4 is required to be formed, so that the coil 4 is not required to be controlled horizontally and vertically accurately when mounted, thereby being beneficial to the improvement of the assembly efficiency.

In various embodiments as shown in fig. 2 to 6, the length direction of the coil 4 may be perpendicular to the direction in which the armature 2 passes through the gap 31. At this time, it can be seen that the coil 4 is vertically installed on the bottom wall 12, which enables the coil 4 to be installed on the bottom wall 12 in the vertical direction (the direction from the top wall 11 to the bottom wall 12) when the coil 4 is installed, and the armature 2 can also pass through or be connected to the coil 4 (or other positions) in the same direction, and since other components (such as the magnetic component 3) can also be installed in the vertical direction, the sound-electricity conversion device can be assembled in the vertical direction when being assembled, and the direction does not need to be changed in the assembling process, so that the assembling efficiency can be greatly improved.

Moreover, the assembly of the acoustic-electric conversion device with the structure can be automatically carried out through a manipulator, auxiliary installation components such as clamps are not required to be arranged, the assembly efficiency is improved, and the assembly cost is saved.

In the embodiment shown in the given figure, the coil 4 is mounted vertically. Specifically, the end face of the coil 4 may be directly or indirectly mounted on the bottom wall 12, wherein the end face of the coil 4 and the bottom wall 12 may be adhered by glue, so as to fix the coil 4. With such a structure, the bottom wall 12 can be horizontally placed under the automatic assembly condition, the coil 4 can be fixedly mounted on the inner surface of the bottom wall 12 from top to bottom, and meanwhile, no other spacer is arranged between the coil 4 and the bottom wall 12, which is beneficial to improving the integration level and miniaturization of the device.

In another embodiment (not shown), the end face of the coil 4 may be indirectly connected to the bottom wall 12, for example, to facilitate assembly of the coil 4 and to adapt to the structure of the motor assembly, other components (such as a mounting plate and a mounting bracket) are fixed on the bottom wall 12, and the end face of the coil 4 may be indirectly fixed on the bottom wall 12 by being mounted on the other components.

In an embodiment, when the longitudinal direction of the coil 4 is not parallel to the gap 31 of the magnetic member 3, a difference in height between the height of one end of the coil 4 from the bottom wall 12 and the height of the armature 2 from the bottom wall 12 may occur, or the position or state in which the armature 2 extends into the gap 31 in the longitudinal direction of the coil 4 is not a desired position or state.

In view of this consideration, in order to ensure that the armature 2 is positioned accurately in the gap 31 formed by the magnetic member 3, the armature 2 has a plurality of bent portions 21(bends) in the extending direction thereof. This arrangement facilitates the armature 2 to pass through the gap 31 in a direction perpendicular to the magnetic induction line formed by the magnetic member 3 in an un-vibrated state when the armature 2 and the coil 4 are not parallel, thereby establishing a preferable magnetic path between the coil 4, the armature 2, and the magnet 3 a.

In the embodiment shown in fig. 5, the armature 2 is bent at least twice as it extends from the end 25 remote from the gap 31 to the end close to the gap 31. At this time, the armature 2 has at least two bending portions 21 from the end 25 far from the gap 31 to the end 26 near the gap 31, and the extending direction of the armature 2 is changed every time the armature 2 passes through one bending portion 21. For the convenience of processing, and considering that the vertical coil 4 is perpendicular to the gap 31 (or the direction in which the armature 2 passes through the gap 31), the bending angle of each bending portion 21 of the armature 2 is 90 degrees (in practice, there may be a float of ± 10 ° in a direction perpendicular to the magnetic field direction when the armature 2 enters the gap 31), and the bending portion 21 is rounded.

Note that, in the present application, the bending of the armature 2 in the width direction (perpendicular to the extending direction of the armature 2, and the left-right direction when the armature 2 extends) is not limited, that is, the armature 2 may have deformation (press forming, bending forming, or the like) in the width direction, and the present embodiment is not limited at all.

In the embodiment shown in fig. 5, the end face of the coil 4 may be mounted by directly or indirectly connecting the end of the core 20 to the bottom wall 12 of the housing 1. In consideration of the fact that the magnetic core 20 may be made of a magnetic conductive material, the end of the magnetic core 20 may be fixed to the bottom wall 12 of the housing 1 by welding, so as to have better stability. In another embodiment, the end portion of the magnetic core 20 may be indirectly connected to the bottom wall 12 of the housing 1 by being attached to another component as described above.

With continued reference to the embodiment shown in fig. 5, the armature 2 is directly connected to the bottom wall 12, and at this time, the armature 2, the magnetic core 20 and a part of the bottom wall 12 form a magnetic path. The magnetic resistance in the magnetic field transmission process can be reduced by forming the magnetic passage, the motion amplitude of the armature 2 can be effectively ensured, and the tone quality of sound output is further improved. In this embodiment, the armature 2 and the core 20, as well as at least a portion of the bottom wall 12, may each be constructed of a magnetically permeable material.

In this embodiment, the armature 2 and the magnetic core 20 may be of an integral structure, the portion of the armature 2 protruding into the passage 41 of the coil 4 forming the magnetic core 20 and the end portion being fixed to the bottom wall 12. The armature 2 and the magnetic core 20 have three bending portions 21, and each bending portion 21 is bent at 90 degrees.

In this embodiment, the armature 2 and the magnetic core 20 extend from the coil 4 to the magnetic member 3 through the three bent portions 21 and have a first vertical portion (magnetic core 20), a first horizontal portion, a second vertical portion, and a second horizontal portion. The first vertical portion and the second vertical portion are perpendicular to the bottom wall 12 (inner surface), and the first horizontal portion and the second horizontal portion are parallel to the bottom wall 12, so that the armature 2 has a regular bending structure, which is convenient to manufacture, and can better adapt to the height difference of the horizontal gap 31 formed by the vertical coil 4 and the magnetic component 3, and the armature 2 and the magnetic core 20 can be inserted into the coil 4 from top to bottom for assembly during assembly, which is very beneficial to improving the assembly efficiency.

It should be noted that the assembly does not interfere with the assembly of the magnetic component 3, for example, one magnet 3a of the magnetic component 3 may be assembled first, and another magnet 3a above the armature 2 may be assembled later, and the top-down manner may also be adopted.

In another embodiment as shown in fig. 6, the armature 2 and the magnetic core 20 may also be a unitary structure, and the magnetic core 20 may extend through the bottom wall 12 of the housing 1 and be fixedly attached to the outer surface of the bottom wall 12. Specifically, one end of the magnetic core 20 extends into the outside of the housing 1 through the opening 14 of the bottom wall 12, and is fixedly connected to the outer surface of the bottom wall 12 by bending, wherein the bent portion 21 near the end portion is bent at an angle of approximately 90 degrees to fit the outer surface of the bottom wall 12. In contrast to the embodiment shown in fig. 2, the armature 2 and the core 20 in this embodiment have four bent portions 21. When the coil 4 and the armature 2 are assembled, the end of the armature 2 extending out of the housing 1 may be bent and fixed.

In the present application, the armature 2 and the magnetic core 20 are not limited to the integral structure, but in another embodiment, for example, as shown in fig. 5, the armature 2 and the magnetic core 20 are separate structures. When the reader faces fig. 5, the lower end of the armature 2 is fixedly connected to the inner surface of the bottom wall 12 of the housing 1, the upper end is welded to the left end of the armature 2, the armature 2 has two bent portions 21 from the left end to the right end, and the right end passes through the gap 31.

In the embodiment shown in fig. 2 to 4, the armature support member 5 is provided in the housing 1, and the armature support member 5 supports the armature 2 between the coil 4 and the magnetic part 3, so that the positioning of the armature 2 in the gap 31 formed by the magnetic part 3 can be performed by the armature support member 5, thereby reducing the requirement for precise control of the position between the armature 2 and the coil 4, and facilitating improvement of the assembly efficiency.

Wherein the armature support member 5 is fixed to the inner surface of the bottom wall 12, specifically, the armature support member 5 is located between the armature 2 and the bottom wall 12 in the direction perpendicular to the bottom wall 12, and is located between the coil 4 and the magnetic part 3 in the extending direction of the armature 2. The armature supporting member 5 may be formed integrally with the housing 1, for example, the armature supporting member 5 is formed by partially protruding the bottom wall 12. Alternatively, the armature support member 5 is fixed to the bottom wall 12 by means of a connection (e.g., welding, bonding) or the like. The shape structure of the armature support member 5 may be a cube, a rectangular parallelepiped, or other regular shapes, such as the rectangular parallelepiped as a whole shown in fig. 3; of course, the armature supporting member 5 may have an irregular shape, and the present application is not limited in any way as long as the armature supporting member 5 can support the armature 2 and position the armature 2 through the gap 31.

In order to avoid the problem that the magnetic induction lines are led out by the armature supporting member 5 when being transmitted on the armature 2, so that the magnetic induction lines are reduced and even cannot be transmitted to the part of the armature 2 positioned in the gap 31, and further the armature 2 cannot move, the magnetic permeability of the armature supporting member 5 is at least 1000 times smaller than that of the armature 2. Further, the armature supporting member 5 is made of a non-magnetic conductive material.

An embodiment of the present application further provides an audio device, which includes the sound-electricity conversion apparatus according to any one of the above embodiments. In this embodiment, the shape, structure, and function of the acoustic-electric conversion device in any of the above embodiments may be referred to for the acoustic-electric conversion device, and details are not repeated in this embodiment. Specifically, the audio equipment comprises at least one of an earphone and a hearing aid.

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. An acoustoelectric conversion device, comprising:

a housing having opposing top and bottom walls; and

the armature supporting member is located outside the coil and supports the armature between the coil and the magnetic part; the coil has a magnetic core disposed within the coil channel; the armature extends from the magnetic core to the magnetic component, the armature being supported by the armature support;

2. The acousto-electric conversion device of claim 1 wherein the armature bends at least twice as it extends from the end remote from the gap to the end proximate to the gap.

3. The acoustic-electric conversion apparatus according to claim 1 or 2, wherein: the length direction of the coil is perpendicular to the direction in which the armature passes through the gap.

4. The acoustic-electric conversion apparatus according to claim 1 or 2, wherein: the end face of the coil is directly or indirectly connected to the bottom wall of the housing.

5. The acoustic-electric conversion apparatus according to claim 4, wherein: the end of the magnetic core is directly or indirectly connected to the bottom wall of the housing.

6. The acoustic-electric conversion apparatus according to claim 5, wherein: the armature and the magnetic core are of an integrated structure with three bending parts.

7. The acoustic-electric conversion apparatus according to claim 4, wherein: the magnetic core extends through the bottom wall of the shell and is fixedly connected with the outer surface of the bottom wall.

8. The acoustic-electric conversion apparatus according to claim 7, wherein: the armature and the magnetic core are of an integrally formed structure with four bending parts.

9. The acoustic-electric conversion apparatus according to claim 1 or 2, wherein: the armature is directly connected to the bottom wall, and the armature, the magnetic core, and a portion of the bottom wall form a magnetic path.

10. The acoustic-electric conversion apparatus according to claim 9, wherein: the armature and the magnetic core are of an integrally formed structure.

11. The acoustic-electric conversion apparatus according to claim 1, wherein: the magnetic permeability of the armature support member is at least 1000 times less than the magnetic permeability of the armature.

12. The acoustic-electric conversion apparatus according to claim 1, wherein: the armature supporting member is made of a non-magnetic conductive material.

13. The acoustic-electric conversion apparatus according to claim 2, wherein: the bending angle of each bending part of the armature is 90 degrees, and the bending part is processed in a round angle mode.

14. The acoustic-electric conversion apparatus according to claim 1 or 2, wherein: the housing has a side wall between the top and bottom walls; an opening is formed in the side wall; and a PCB arranged on the opening is fixedly connected to the surface of the coil.

15. The acoustic-electric conversion apparatus according to claim 14, wherein: the housing has a protrusion that positions the coil in the housing and prevents movement of the coil and the PCB.

16. The acoustic-electric conversion apparatus according to claim 15, wherein: the positioning protrusion is formed by punching.

17. The acoustic-electric conversion apparatus according to claim 1 or 2, wherein: the magnetic core and the armature are of a split structure.

18. Audio device, characterized in that it comprises an acousto-electric conversion arrangement according to any one of claims 1-17.

19. The audio device of claim 18, wherein: the audio device is at least one of an earphone and a hearing aid.