WO2019037187A1

WO2019037187A1 - Sound emitting device

Info

Publication number: WO2019037187A1
Application number: PCT/CN2017/102686
Authority: WO
Inventors: 张成飞; 王建建
Original assignee: 歌尔股份有限公司
Priority date: 2017-08-25
Filing date: 2017-09-21
Publication date: 2019-02-28
Also published as: CN207304906U

Abstract

A sound emitting device, comprising a housing (5) having a rectangular profile, a vibrating diaphragm assembly that is fixed together with the housing (5) and sound coil (3) that is connected at a lower end of the vibrating diaphragm assembly; a support rod (4) is provided between the sound coil (3) and the housing (5), the support rod (4) comprising a frame (40) that is matchingly combined with an end of the sound coil that is far from the vibrating diaphragm assembly, as well as a connecting portion (42) that is connected and fixed to a corner position of the rectangular housing (5); the sound emitting device further comprises an elastic beam (41) that is located between the connecting portion (42) and the frame (40). The present invention may effectively weaken polarization, increase the auditory margin, increase the power of the sound emitting device and improve overall performance.

Description

Sounding device

Technical field

The present invention relates to the field of electroacoustics and, more particularly, to a sound emitting device.

Background technique

A speaker is an important acoustic component in an electronic device that is a transducer that converts an electrical signal into an acoustic signal. An existing speaker module includes a housing, and a magnetic circuit system disposed within the housing and a vibration system including a diaphragm and a voice coil disposed under the diaphragm. The voice coil drives the diaphragm to make sounds under the vibration of the magnetic circuit system.

In some speaker structures, in order to suppress the polarization of the voice coil, a centering piece is usually disposed between the diaphragm and the voice coil, so that the centering piece can function to balance the vibration of the voice coil, but in the prior art The centering piece is usually designed as a rectangular ring structure, including a frame connected to the voice coil and a connecting portion fixed to the outer casing, and the frame and the connecting portion are both designed as a ring structure. The elastic arms of the sheets tend to be evenly distributed in the gap formed by the two. However, since the four-corner position of the vibration system is the most severely polarized part during the vibration process, the design of the centering support piece in the prior art has a limited effect on balancing the voice coil vibration.

Summary of the invention

It is an object of the invention to provide a sounding device.

According to an aspect of the present invention, a sound emitting device includes a housing having a rectangular outline, a diaphragm assembly fixed to the housing, and a voice coil coupled to a lower end of the diaphragm assembly; A support member is disposed between the housings, wherein the support member includes a frame that is matched with an end of the voice coil away from the diaphragm assembly, and a connection portion fixedly connected to a corner of the rectangular housing, and further includes An elastic beam between the joint and the frame.

Optionally, the frame located at a middle position of the support member has a closed annular shape; the connecting portion at the edge position of the support member is disposed corresponding to the four corners of the rectangular housing; the elastic beam corresponds to Four are provided extending from the four corners of the frame to the four connections.

Optionally, the elastic beam is S-shaped or serrated.

Optionally, the connecting portion, the elastic beam and the frame are integrally formed structures.

Alternatively, the support member may be a silicone and/or thermoplastic elastomer material.

Optionally, the support member adopts an FPCB board, and a lead-out position of the lead wire on the voice coil is located at a lower end of the voice coil, and a pad electrically connecting the voice coil lead is further disposed on the support member.

Optionally, the diaphragm assembly comprises a diaphragm, and a dome that is compounded in a vibration region of the diaphragm; the diaphragm assembly is a flat top or a middle convex type or a middle concave type or a middle hollow type.

Optionally, a magnetic circuit system is further included; the magnetic circuit system includes a yoke, and a central magnet disposed on the yoke, a side magnet disposed at least on two long axis sides of the yoke and forming a magnetic gap with the center magnet .

Optionally, the yoke is a flat plate structure, and the side magnets are provided with four blocks respectively corresponding to two long axis sides and two short axis sides of the yoke.

Optionally, the housing is injection-molded and combined with a side washer, the lead wire of the voice coil is suspended, and the lead wire is led out to correspond to a position above the edge of the edge, and an injection molded part is further disposed at the position. And, the injection molded part is formed with a groove for receiving the lead.

In the vibration system of the present invention, the lower end of the voice coil is stably supported by the frame of the support member, and the upper end of the voice coil is connected with the diaphragm, whereby the upper and lower ends of the voice coil can be respectively restricted by the diaphragm and the support member. Therefore, the vibration of the voice coil can be more effectively balanced, the polarization problem of the voice coil is reduced, the sounding effect of the vibration system is improved, the listening margin is increased, the power of the sounding device is improved, and the performance of the whole machine is improved.

Moreover, since the connecting portion of the supporting member and the housing is respectively disposed corresponding to the four corners of the housing, the elastic beam is also correspondingly distributed at the corner position, and the structure can more significantly weaken the polarization at the four corner positions of the voice coil. The balance voice coil has a better vibration effect.

Since the casing is injection-molded and combined with the edge washer, the lead of the voice coil is led to the position above the edge of the edge, and the injection molded part is also disposed at the position, and the concave part of the injection molded part is formed. The slot can reduce the influence of the lead on the voice coil without changing the structure of the original speaker, fully utilizing the magnetic line and ensuring the strength of the lead, and improving the acoustic performance of the speaker as a whole.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The accompanying drawings, which are incorporated in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded view of an embodiment of the sounding device of the present invention.

Figure 2 is a bottom plan view of one embodiment of the sounding device of the present invention.

Figure 3 is a cross-sectional view showing an embodiment of the sounding device of the present invention.

Figure 4 is an exploded view of another embodiment of the sounding device of the present invention.

Figure 5 is a bottom plan view of another embodiment of the sounding device of the present invention.

Figure 6 is a cross-sectional view showing another embodiment of the sounding device of the present invention.

Figure 7 is a schematic view showing the structure of an embodiment of the sounding device support of the present invention.

Figure 8 is a schematic view showing the structure of another embodiment of the sounding device support of the present invention.

Detailed ways

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

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques and devices should be considered as part of the specification.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

Referring to Figures 1 to 3, the present invention provides a sounding device comprising a diaphragm assembly and a voice coil 3 attached to the lower end of the diaphragm assembly. The diaphragm assembly of the present invention may be only a diaphragm 2 comprising a vibrating section at the center, a connecting section at the edge for connection, and a loop section between the vibrating section and the connecting section. The structure of such a diaphragm is well known to those skilled in the art. The voice coil 3 can be attached to the vibration section of the diaphragm 2 by glue.

Of course, for the person skilled in the art, the diaphragm assembly may further comprise a dome 1 which is connected to the vibration section of the diaphragm 2, for example, may be bonded to the upper end surface of the vibration section by glue. Alternatively, the voice coil 3 may be attached to the dome 1 or to the diaphragm 2, depending on the bonding position of the dome 1.

The diaphragm assembly may be of a flat top type, for example, the vibrating section of the diaphragm 2 is a flat surface, and the dome is bonded to the vibrating section. The diaphragm assembly may also be of a central hollow type, for example, a hollow is provided in the middle of the diaphragm 2, the dome 1 covers the hollow position of the diaphragm 2, and the voice coil 3 can be connected to the dome 1 on. Of course, the diaphragm assembly may also be a central convex hull type and a middle concave shape. The diaphragm components of these structures are all common knowledge of those skilled in the art, and are not described herein again.

The sounding device of the present invention further includes a housing 5 on which a support member 4 is disposed. In a specific embodiment, the support member 4 can be a centering tab. Referring to FIG. 7, the support member 4 includes a frame 40 that is shaped to match the lower end of the voice coil 3, and a connecting portion 42 for connection, and an elastic beam 41 between the connecting portion 42 and the frame 40. The connecting portion 42 of the support member 4 can be attached to the lower end of the housing 5, for example, by glue or heat fusion, so that the support member 4 is suspended below the housing 5.

The shape and size of the frame 40 are matched with the lower end of the voice coil 3, so that the frame 40 can be bonded to the lower end surface of the voice coil 3. Specifically, the frame 40 is designed as a hollow closed annular structure located at the center of the support member 4. . For example, the frame 40 can take a rectangular frame.

In the present technical solution, the connecting portion 42 and the elastic beam 41 may be respectively provided with four, wherein the connecting portion 42 at the edge position of the supporting member 4 corresponds to the positions of the four corners of the rectangular housing 5 to realize the frame 40. Stable support. Correspondingly, in the gap between the connecting portion 42 and the frame 40, the elastic beams 41 are also distributed at the corner positions. Specifically, the elastic beams 41 extend from the four corners of the frame 40 to the connecting portion 42. The elastic beam 41 can adopt an S-shaped or serrated structure, so that In order to improve the vibration characteristics of the frame 40, the frame 40 is balanced. In addition, since the elastic beam 41 is disposed at the corner portion, the polarization of the four corners of the voice coil can be effectively improved.

The housing 5 of the present invention preferably has a hollow interior, the support member 4 is attached to the lower end of the housing 5 when installed, and the connecting portion of the diaphragm 2 can be bonded to the upper end of the housing 5, The voice coil 3 passes through the inner cavity of the housing 5 and is bonded to the frame 40 of the support member 4, so that the support member 4 can support and support the voice coil 4 from the lower end.

In the sounding device of the present invention, the lower end of the voice coil is stably supported by the frame of the support member, and the upper end of the voice coil is connected with the diaphragm, whereby the upper and lower ends of the voice coil can be respectively restricted by the diaphragm and the support member. Therefore, the vibration of the voice coil can be more effectively balanced, the polarization problem of the voice coil is reduced, the sounding effect of the vibration system is improved, and the reliability of the vibration system is improved.

In the present invention, the connecting portion 42, the elastic beam 41, and the frame 40 of the support member 4 may be integrally formed. In a specific embodiment of the present invention, the support member 4 may be made of a silicone material, a thermoplastic elastomer material, or a composite structure of the two. Of course, a highly elastic material is listed here, and of course, a plastic material or the like which is well known to those skilled in the art may be used as long as it has a certain elasticity. Referring to Fig. 7, with the support member 4 of such a structure, the upper end of the voice coil 3 is connected to the diaphragm assembly, and the lower end is connected to the frame 40 of the support member 4. The lead 31 of the voice coil 3 is still taken out in a conventional wiring manner.

In another specific embodiment of the present invention, the support member 4 is an FPCB board. Referring to FIG. 8, a pad 43 electrically connecting the lead wires 31 of the voice coil 3 is further disposed on the support member 4. With the support member 4 of such a structure, the lead-out position of the voice coil 3 lead 31 can be set at the lower end of the voice coil 3, and the lower end of the voice coil 3 is connected to the frame 40 of the support member 4, and the lead 31 is directly It is attached to the pad 43 of the support member 4 so that the electrical signal of the voice coil lead 31 can be led out through the support member 4 itself.

The magnetic circuit system of the present invention may be a single magnetic circuit, a dual magnetic circuit, or other magnetic circuit structures well known to those skilled in the art. In a specific embodiment of the present invention, referring to FIG. 1, the magnetic circuit system includes a yoke 8, and a central magnet 70 disposed on the yoke 8, and two long-axis sides and two correspondingly disposed on the yoke 8, respectively. Four side magnets 71 on the short axis side. The center magnet 70 may be disposed in a central region of the yoke 8, and a center washer 6 is further disposed on the upper end surface of the center magnet 70. The side magnet 71 is disposed outside the center magnet 70 such that the center magnet 70 and the side magnet A magnetic gap for engaging the voice coil 3 is formed between the 71s. Of course, it is also possible to provide only two side magnets so as to be correspondingly distributed on the two long axis sides of the yoke 8. The specific structure of the magnetic circuit can be designed according to the actual situation, and in principle does not affect the implementation of the technical solution.

Under the action of the magnetic circuit system, the energized voice coil can drive the diaphragm assembly to vibrate and vocalize. This principle of sounding belongs to the common knowledge of those skilled in the art, and will not be specifically described herein.

Figures 4-6 show a sounding device of another embodiment, which is substantially identical to the above-described embodiment, except that:

Referring to FIG. 5 and FIG. 6, the housing 5 is integrally molded with the edge washer 61, and the lead wire 31 of the voice coil 3 is taken out corresponding to the position above the edge washer 61, specifically from the long axis direction. The upper position of the edge washer 61 is in line, and the injection molded member 51 is further disposed at the position, and the injection molded member 51 is formed with a groove for receiving the lead wire 31. In this structural design, the leads 31 are arranged in a suspended manner. This structure can improve the acoustic performance of the speaker as a whole without changing the structure of the original speaker, fully utilizing the magnetic lines of force and ensuring the strength of the lead.

While the invention has been described in detail with reference to the specific embodiments of the present invention, it should be understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A sounding device comprising a housing (5) having a rectangular outline, a diaphragm assembly fixed to the housing (5), and a voice coil (3) connected to a lower end of the diaphragm assembly; the voice coil ( 3) A support member (4) is disposed between the housing (5) and is characterized by:

The support member (4) includes a frame (40) matched with the end of the voice coil (3) away from the diaphragm assembly, and a connecting portion (42) fixedly connected to a corner position of the rectangular housing (5) Also included is an elastic beam (41) between the connecting portion (42) and the frame (40).
A sounding device according to claim 1, characterized in that the frame (40) at the central position of the support member (4) has a closed annular shape; a connecting portion at the edge of the support member (4) (42) ) respectively corresponding to the four corners of the rectangular casing (5); the elastic beams (41) are correspondingly provided with four, extending from the four corners of the frame (40) to the four connecting portions (42) .
The sounding device according to claim 1 or 2, characterized in that the elastic beam (41) is S-shaped or serrated.
The sounding device according to any one of claims 1 to 3, characterized in that the connecting portion (42), the elastic beam (41), and the frame (40) are integrally formed.
The sounding device according to any one of claims 1 to 4, characterized in that the support member (4) is made of a silicone rubber and/or a thermoplastic elastomer material.
The sounding device according to any one of claims 1 to 5, characterized in that the support member (4) is an FPCB board, and the lead-out position of the lead wire on the voice coil (3) is located at the lower end of the voice coil (3). A pad (43) electrically connecting the voice coil leads is further disposed on the support member (4).
The sounding device according to any one of claims 1 to 6, characterized in that the diaphragm assembly comprises a diaphragm (2), and a dome (1) compounded in a vibration region of the diaphragm (2); The diaphragm assembly is of a flat top type or a middle convex type or a central concave type or a central hollow type.
A sounding device according to any one of claims 1 to 7, further comprising a magnetic circuit system; said magnetic circuit system comprising a yoke (8), and a center magnet disposed on the yoke (8) ( 70) An edge magnet (71) provided at least on the two major axis sides of the yoke (8) and forming a magnetic gap with the center magnet (70).
The sounding device according to claim 8, characterized in that the side magnets (71) are provided with four blocks respectively corresponding to the two long axis sides and the two short axis sides of the yoke (8).
The sounding device according to any one of claims 1 to 9, characterized in that: the casing (5) is injection-molded and bonded with a side huasi, and the lead wires of the voice coil (3) are suspended and arranged, and the lead wire is led out correspondingly An injection molding is further disposed at a position above the edge of the edge, and an injection molded piece is further disposed at the position, and a groove for receiving the lead is formed on the injection molded part.