WO2019184152A1

WO2019184152A1 - Diaphragm and receiver

Info

Publication number: WO2019184152A1
Application number: PCT/CN2018/096477
Authority: WO
Inventors: 陈斌
Original assignee: 深圳倍声声学技术有限公司
Priority date: 2018-03-28
Filing date: 2018-07-20
Publication date: 2019-10-03
Also published as: CN108289273A

Abstract

The present application relates to the technical field of receivers, and provides a diaphragm and a receiver. The diaphragm comprises: a vibration sheet, a main portion of the vibration sheet protruding toward the top surface of the vibration sheet to form a first protrusion; a film, the top surface of the film covering the bottom surface of the vibration sheet, and the film comprising a second protrusion formed along the outer contour of the vibration sheet and toward the top surface of the vibration sheet; a support frame, the support frame being attached to the bottom surface of the film and comprising an annular frame body and bending portions extending from the edge of the frame body toward the side away from the film, wherein the number of the bending portions is two or more, and the bending portions are respectively disposed on different sides of the frame body. According to the present application, the process for diaphragms is simple, the production cycle is short, the costs are low, and the receiver housing positioning precision is high.

Description

A diaphragm and a receiver

[Technical Field]

The present application relates to the field of receiver technologies, and in particular, to a diaphragm and a receiver.

【Background technique】

The moving iron receiver is mainly used in wearable devices such as hearing aids and earphones, and the assembly positioning accuracy directly affects the performance of the finished receiver. If the assembly accuracy is not good enough and the assembly process is unreasonable, the acoustic curve may be poorly consistent, the sound pressure is not large enough, and the acoustic parameters such as sound distortion and abnormal sound may be poor.

In the assembly process of the receiver, the diaphragm is the core of the structure of the moving iron receiver, and the diaphragm generates vibration pressure during the process of compressing the air, and achieves rapid rebound by the rigidity of the vibration plate, thereby improving the distortion of the audio. After the diaphragm of the existing moving iron receiver is formed, it needs to be placed in the outer casing of the receiver, and the positioning of the diaphragm and the outer casing is realized by the bosses around the outer casing. However, the existing process requirements for punching the boss around the outer casing are difficult. The special jig is required to punch four bosses on the outer side of the stretched outer casing in turn, and the production cycle of the punching boss is long and the cost is high, and the diaphragm and the high requirements of the punching process lead to the diaphragm and the The positioning accuracy of the outer casing is low.

[Summary of the Invention]

In order to solve the above technical problem, the embodiment of the present application provides a diaphragm and a receiver which are simple in process, short in production cycle, low in cost, and high in positioning accuracy.

To solve the above technical problem, the embodiment of the present application provides the following technical solutions:

In a first aspect, an embodiment of the present application provides a diaphragm, including:

a vibration piece, a main portion of the vibration piece protruding toward a top surface side of the vibration piece to form a first protrusion;

a film, a top surface of the film covering a bottom surface of the vibration piece, the film comprising a second protrusion formed along an outer contour of the vibration piece toward a top surface side of the vibration piece;

a support frame, the support frame being attached to the bottom surface of the film, comprising an annular frame body and a bent portion extending from a side of the frame body toward a side away from the film, the number of the bent portions being At least two are respectively disposed on different sides of the frame body.

Further, the bent portion includes a connecting portion connected to the frame body and a snap portion extending from an edge of the connecting portion, the engaging portion being perpendicular to the frame body.

Further, the connecting portion has an arc shape.

Further, the bent portion includes two first bent portions and a second bent portion symmetrically disposed along a longitudinal direction of the frame body.

Further, the bent portion further includes a third bent portion disposed along a width direction of the frame body.

Further, each of the bent portions has the same height in a bending direction thereof, and the lengths of the first bent portion and the second bent portion are both smaller than the length of the frame body.

Further, the outer contour of the frame body is a rounded rectangle.

Further, the second protrusion is a half-enclosed structure that is open on one side, and an accommodating space is formed on the film, and the vibration piece is disposed in the accommodating space.

Further, a first through hole is defined in one end of the diaphragm, and a second through hole is disposed on the film corresponding to the first through hole, the first through hole and the second through hole Used to connect to a conductive rod.

In a second aspect, an embodiment of the present application further provides a receiver including a housing and a diaphragm as described above, the outer side of the bent portion of the diaphragm abutting the inner side wall of the housing.

The beneficial effects of the present application are as follows: Compared with the prior art, the embodiment of the present application provides a diaphragm and a receiver. By providing an annular frame body and a bent portion extending from a side of the frame body toward a side away from the film, the number of the bent portions is at least two, respectively disposed on different sides of the frame body, so that the diaphragm process is simple and production The cycle is shorter, the cost is lower, and the positioning accuracy with the receiver housing is higher.

[Description of the Drawings]

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

FIG. 1 is a schematic diagram of a receiver according to an embodiment of the present application;

2 is a schematic structural view of a diaphragm provided by an embodiment of the present application;

3 is an exploded view of a diaphragm provided by an embodiment of the present application;

4 is a schematic view showing an assembly structure of a diaphragm and a casing according to an embodiment of the present application;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4 according to an embodiment of the present application.

【detailed description】

In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It is to be noted that when an element is described as being "fixed" to another element, it can be directly on the other element, or one or more central elements can be present. When an element is referred to as "connected" to another element, it can be a <RTI ID=0.0> </ RTI> </ RTI> <RTIgt; The orientation or positional relationship of the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inside", "outside", etc., as used in this specification is based on the drawings The orientation or positional relationship shown is for the convenience of the description of the present application and the simplified description, and is not intended to indicate or imply that the device or component referred to has a particular orientation, is constructed and operated in a particular orientation, and therefore is not to be construed as limits. Moreover, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless otherwise defined, all technical and scientific terms used in the specification are the same meaning The terms used in the description of the present application are for the purpose of describing the specific embodiments and are not intended to limit the application. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items.

Further, the technical features involved in the different embodiments of the present application described below may be combined with each other as long as they do not constitute a conflict with each other.

Please refer to FIG. 1 , which is a schematic diagram of a receiver according to an embodiment of the present application. As shown in FIG. 1, the receiver 100 includes a diaphragm 200, a housing 11, a conductive rod 12, an armature 13, a coil structure 14, a yoke 15, a permanent magnet 16, a sound tube 17, and a lead terminal 18. The diaphragm 200, the conductive rod 12, the armature 13, the coil structure 14, the yoke 15 and the permanent magnet 16 are all disposed in the outer casing 11. Generally, the number of the coil structure 14, the yoke 15 and the permanent magnet 16 is two, and is a symmetric arrangement. The fixed body of the armature 13 is fixed to the yoke 15, and two permanent magnets 16 are vertically symmetric. A receiving space is disposed between the vibrating body of the armature 13 and suspended in the receiving space, and the vibrating body of the armature 13 is parallel to the two permanent magnets 16. One end of the vibrating body of the armature 13 is provided with a through hole for connecting one end of the conductive rod 12, and the other end of the conductive rod 12 is connected to the diaphragm 200.

The vibrating body of the armature 13 is suspended from a position near the middle of the coil structure 14 in order to reserve sufficient vibration space for the vibrating body of the armature 13. When the initial power is not applied, the vibration body of the armature 13 is in an equilibrium state, and when the receiver 100 starts operating, the magnetic field generated by the permanent magnet 16 is induced by the coil structure 14 in the armature 13 The interaction causes the vibration body of the armature 13 to vibrate up and down, and the diaphragm 200 is driven to vibrate by the conductive rod 12 to emit sound.

Referring to FIGS. 2 to 3 , the diaphragm 200 includes a diaphragm 10 , a film 20 , and a support frame 30 .

The main body portion 101 of the diaphragm 10 is formed with a first protrusion 102 protruding toward a top surface of the diaphragm 10, and a first through hole 103 is defined in the main body of the diaphragm 102. In the embodiment of the invention, the thickness of the diaphragm 10 is uniform, that is, the thickness of the main body portion 101 is uniform, and a better effect can be achieved in acoustic consistency, sound pressure, etc., in some embodiments, the vibration The thickness of the sheet 10 may be inconsistent. For example, the thickness of the first protrusions 102 is slightly thinner than the remaining body portions that are not convex, which may make the vibration of the diaphragm 102 easier.

The first protrusion 102 is a hollow protrusion having a trapezoidal cross section, which is favorable for compressing air in the chamber formed by the film 20 and the first protrusion 102 to form sound pressure when the film 20 vibrates. The final sound pressure reaches the upper surface of the inner wall of the first protrusion 102, and the sound pressure is quickly rebounded by the rigidity of the diaphragm 10 to improve the distortion of the sound.

The diaphragm 10 is made of aluminum-magnesium alloy, stainless steel or nickel. The rigidity of the aluminum-magnesium alloy, stainless steel or nickel diaphragm is better than that of the existing aluminum diaphragm, and the high-frequency ductility of the sound. It also performed more prominently. In some embodiments, the diaphragm 10 may also be made of other metals, alloys, ceramics or new materials.

A top surface of the film 20 covers a bottom surface of the diaphragm 10, and the film 20 includes a second protrusion formed along an outer contour of the diaphragm 10 toward a top surface side of the diaphragm 10. 201. A second through hole 202 is disposed at a position corresponding to the first through hole 103 on the film 20. The second protrusion 201 is a half-enclosed structure that is open on one side, and an accommodating space 203 is formed on the film 20 , and the diaphragm 10 is disposed in the accommodating space 203 . In some embodiments, the film 20 is provided with a gas pressure balance hole, which is ventilated to reduce the force of the other components when the film 200 is formed, and can also balance the cavity of the receiver 100. And the air pressure in the lower cavity.

In the embodiment of the present application, the opening of the accommodating space 203 faces an end away from the second through hole 202, and the second protrusion 201 can be understood as a vibrating runway, which is formed on the diaphragm 200. Formed during the process, the second protrusions 201 are more susceptible to vibration than the planar film structure. The film 20 may be a polyester film, a silica film, or the like. When a film having better temperature characteristics is used, the film 20 can directly pass through a reflow soldering device during the production process of the receiver, thereby improving the automated production degree of the receiver and thereby improving the film. The productivity of the receiver.

In summary, a first through hole 103 is defined in one end of the diaphragm 10, and a second through hole 202 is disposed on the film 20 at a position corresponding to the first through hole 103. The first through hole 103 is provided. The second through hole 202 is connected to the conductive rod 12.

The support frame 30 is attached to the bottom surface of the film 20, and includes an annular frame body 301 and a bent portion 302 extending from a side of the frame body 301 toward a side away from the film 20, the bent portion The number of 302 is at least two, which are respectively disposed on different sides of the frame body 301. When the number of the bent portions 302 is 2, in the preferred case, it should be disposed on the opposite side of the frame body 301.

The outer contour of the frame body 301 is a rounded rectangle, and the outer contour of the frame body 301 can also be any other shape, which is not limited in the present application. It can be understood that the second protrusion 201 is disposed relative to the hollow portion of the frame body 301 such that air under the support frame 30 acts on the second protrusion 201 through the hollow portion of the frame body 301. And the remainder of the film 20.

The support frame 30 can be fixed by a stainless steel material, or can be replaced by other materials with better rigidity. The material of the bending portion 302 can be consistent with the material of the support frame 30. In the case where the acoustic effect of the bent portion 302 is not obvious, other inexpensive materials capable of supporting positioning may be employed for cost reasons.

The bent portion 302 includes a connecting portion 3021 connected to the frame body 301 and a catching portion 3022 extending from an edge of the connecting portion 3021. The engaging portion 3022 is perpendicular to the frame body 301. In the embodiment of the present application, the connecting portion 3021 has an arc shape, that is, an R angle which is often said. In the process of opening the mold, the arc-shaped connecting portion 3021 is more easily manufactured. Of course, the connecting portion is 3021 may also extend from the edge of the frame body 301. At this time, the connecting portion 3021 is parallel to the frame body 301, and the R angle is equal to 90 degrees. As a preferred embodiment of the embodiment of the present application, the thickness of the connecting portion 3021 is equal to the thickness of the engaging portion 3022, and the thickness of the connecting portion 3021 is equal to the thickness of the frame body 301. Of course, the thickness of the connecting portion 3021 may also be smaller or larger than the thickness of the frame body 301.

Referring to FIG. 4 to FIG. 5 , the bending portion 302 includes two first bending portions 31 and a second bending portion 32 symmetrically disposed along the longitudinal direction of the frame body 301 , and the bending portion 302 . A third bent portion 33 disposed along the width direction of the frame body 301 is also included. It can be understood that, according to the balance principle of mechanics, the two first bending portions 31 and the second bending portion 32 disposed on the opposite sides can achieve the effect of smooth support. Of course, the present application does not limit the bending. For example, the fourth bending portion symmetrical with the third bending portion 33 may be disposed along the width direction of the frame body 301, and for example, the first bending portion 31 and the second bending portion The portion 32 and the third bent portion 33 are formed by a plurality of bent portions that are not connected, that is, the bent portions in the same direction are discontinuous. In the embodiment of the present application, the lengths of the first bending portion 31 and the second bending portion 32 are both smaller than the length of the frame body 301, and the first bending is ensured on the premise that the positioning is stable. The length of the folded portion 31 and the second bent portion 32 is appropriately shortened to save material, thereby reducing the cost of the diaphragm 200. Similarly, the length of the third bent portion 33 is smaller than the frame body 301. The width.

As can be seen from the assembly structure 300 of the diaphragm 200 and the outer casing 11, the outer side of the bent portion 302 of the diaphragm 200 abuts against the inner side wall of the outer casing 11, and each of the bent portions 302 is bent at The heights in the directions are equal, so that the bent portion 302 can be placed in the outer casing 11 smoothly and in parallel, and the outer side wall of the bent portion 302 reaches the inner side wall of the outer casing 11 to achieve the effect of the card position. .

The present application relates to the field of receiver technology, and provides a diaphragm and a receiver. The diaphragm includes a diaphragm, and a main portion of the diaphragm protrudes toward a top surface side of the diaphragm to form a first protrusion; a film, a top surface of the film covers a bottom surface of the diaphragm The film includes a second protrusion formed along an outer contour of the vibration piece toward a top surface side of the vibration piece; a support frame attached to a bottom surface of the film, including a ring shape The frame body and the bent portion extending from a side of the frame body toward a side away from the film, the number of the bent portions being at least two, respectively disposed on different sides of the frame body. The application can realize the membrane process simple, the production cycle is short, the cost is low, and the positioning accuracy with the receiver casing is high.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; in the idea of the present application, the technical features in the above embodiments or different embodiments may also be combined. The steps may be carried out in any order, and there are many other variations of the various aspects of the present application as described above, which are not provided in the details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the embodiments of the present application. The scope of the technical solution.

Claims

A diaphragm characterized by comprising:

a vibration piece, a main portion of the vibration piece protruding toward a top surface side of the vibration piece to form a first protrusion;

a film, a top surface of the film covering a bottom surface of the vibration piece, the film comprising a second protrusion formed along an outer contour of the vibration piece toward a top surface side of the vibration piece;

a support frame, the support frame being attached to the bottom surface of the film, comprising an annular frame body and a bent portion extending from a side of the frame body toward a side away from the film, the number of the bent portions being At least two are respectively disposed on different sides of the frame body.
The diaphragm according to claim 1, wherein the bent portion includes a connecting portion connected to the frame body and a catching portion extending from an edge of the connecting portion, the engaging portion and the engaging portion The frame body is vertical.
The diaphragm according to claim 1, wherein the connecting portion has an arc shape.
The diaphragm according to any one of claims 1 to 3, wherein the bent portion includes two first bent portions and second bent portions symmetrically disposed along a longitudinal direction of the frame body.
The diaphragm according to claim 4, wherein the bent portion further comprises a third bent portion disposed along a width direction of the frame body.
The diaphragm according to claim 4, wherein each of the bent portions has the same height in a bending direction thereof, and the lengths of the first bent portion and the second bent portion are both smaller than The length of the frame body.
The diaphragm according to any one of claims 1 to 3, wherein the outer contour of the frame body is a rounded rectangle.
The diaphragm according to any one of claims 1 to 3, wherein the second protrusion is a half-enclosed structure having an opening on one side, and an accommodation space is formed on the film, and the diaphragm is disposed. Within the accommodating space.
The diaphragm according to any one of claims 1 to 3, wherein a first through hole is defined in one end of the diaphragm, and a second position on the film corresponding to the first through hole is provided. a through hole, the first through hole and the second through hole being connected to the conductive rod.
An earphone comprising a housing and a diaphragm according to any one of claims 1 to 9, the outer side of the bent portion of the diaphragm abutting the inner side wall of the outer casing.