CN110662143B

CN110662143B - Sound production device

Info

Publication number: CN110662143B
Application number: CN201910934034.0A
Authority: CN
Inventors: 汤仲品; 岳召进
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-03-30
Anticipated expiration: 2039-09-29
Also published as: CN110662143A; WO2021056899A1

Abstract

The invention discloses a sound generating device, which comprises a shell, wherein a magnetic circuit system and a vibration system are installed on the shell, the vibration system is communicated with an external circuit through a signal access terminal arranged on the shell, and the vibration system comprises a vibrating diaphragm assembly, a voice coil assembly and a centering support piece; the voice coil assembly and the centering disk are fixedly connected with the vibrating diaphragm assembly in the vibration direction of the sound generating device, and the centering disk is positioned on the outer side of the voice coil assembly in the direction perpendicular to the vibration direction of the sound generating device; the magnetic circuit system is provided with a line passing part, and a lead wire connected to the voice coil assembly penetrates out of the magnetic circuit system and extends to the signal access terminal to be electrically connected with the signal access terminal. The technical effect of the invention is that the structure of the sound generating device reduces the height of the sound generating device and simplifies the assembly process of the sound generating device.

Description

Sound production device

Technical Field

The invention relates to the technical field of acoustoelectrics, in particular to a sound generating device.

Background

The sound-producing device is a device which converts an electric signal into vibration so as to make the diaphragm vibrate in the air to produce sound.

The sound generating device generally includes a voice coil for introducing an external current, a supporting spider, a magnet for generating a magnetic field, a U-iron for carrying the magnet, a vibrating diaphragm for vibrating to generate sound, and a housing as a carrying integral component.

The outward lead of the voice coil needs to bypass the U-shaped iron and the centering disk, and the problems that the lead laying process is difficult and the space in the extra height direction is occupied exist.

The existing sound generating device increases the height of the sound generating device due to the structure that all parts are stacked and assembled. The volume of space occupied by the sound generating device is increased.

The use of sound generators in various devices is common, and the height of the sound generator determines the amount of space occupied by the sound generator in the device. The total height of the ultrathin sound generating device in the existing sound generating device is generally more than or equal to 12 mm. The installation space of the sound generating device is limited.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of Invention

One object of the present invention is to provide a new solution for a sound generating device.

According to a first aspect of the present invention, there is provided a sound emitting apparatus comprising:

a shell, a magnetic circuit system and a vibration system are arranged on the shell, the vibration system is conducted with an external circuit through a signal access terminal arranged on the shell,

the vibration system comprises a vibrating diaphragm assembly, a voice coil assembly and a centering support piece; the voice coil assembly and the centering disk are fixedly connected with the vibrating diaphragm assembly in the vibration direction of the sound generating device, and the centering disk is positioned on the outer side of the voice coil assembly in the direction perpendicular to the vibration direction of the sound generating device;

the magnetic circuit system is provided with a line passing part, and a lead wire connected to the voice coil assembly penetrates out of the magnetic circuit system and extends to the signal access terminal to be electrically connected with the signal access terminal;

the centering support piece further comprises a first fixing part and a second fixing part which are used for fixing the centering support piece with the silk thread;

the centering support piece also comprises a third fixing part, the third fixing part is positioned at a second connecting point of the third fixing part and the shell, a plurality of first elastic arms are arranged between the third fixing part and the second fixing part, the first elastic arms are close to the edge of the centering support piece, and a first window is formed between every two adjacent first elastic arms; the signal access terminal is injected at a position of the shell corresponding to the first window.

Optionally, the vibrating diaphragm subassembly includes the book ring and the body that combine together, the voice coil assembly includes the voice coil loudspeaker voice coil skeleton of cylindric and twines the voice coil loudspeaker voice coil outside the voice coil loudspeaker voice coil skeleton, the body with the voice coil loudspeaker voice coil skeleton is connected fixedly together.

Optionally, an angle between the body and an axial direction of the voice coil bobbin is greater than 60 °.

Optionally, a cylindrical portion is disposed on the inner side of the centering support, and the top of the cylindrical portion is connected to the diaphragm assembly.

Optionally, the magnetic circuit system comprises a U-shaped iron and a permanent magnet, the U-shaped iron comprises a bottom plate and a side wall, the bottom plate and the side wall form an accommodating cavity, and the permanent magnet is fixed in the accommodating cavity and forms a magnetic gap with the side wall; the wire passing part is arranged on the side wall of the U-shaped iron.

Optionally, the first fixing part is a bottom of the cylindrical part, and the second fixing part is located at a first connecting point of the centering branch piece and the housing; the lead wire threads are fixed with the first fixing part and the second fixing part respectively after penetrating out of the wire passing part of the U-shaped iron.

Optionally, a plurality of third elastic arms are arranged between the first fixing part and the second fixing part, and a third window is formed between the plurality of third elastic arms; and after being fixed with the first fixing part, the lead wire continues to extend to the second fixing part through the third window, and after being fixed, the lead wire is electrically connected with the signal access terminal through the first window.

Optionally, the bottom of the housing is provided with a mounting opening, a clamping piece is arranged in the mounting opening, and the clamping piece and the wire passing part of the U-shaped iron are fixed.

Optionally, the thickness of the sound-producing device is less than or equal to 10 mm.

According to one embodiment of the disclosure, the height of the sound generating device can be reduced, and the assembly process of the sound generating device is simplified.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is an exploded view of the structure of a sound generating device according to an embodiment of the present invention.

Fig. 2 is a schematic view of a centralizer sheet attachment structure according to an embodiment of the invention.

Fig. 3 is a bottom view of the structure of the sound generator of one embodiment of the present invention.

Fig. 4 is a partial cross-sectional view of fig. 3.

Fig. 5 is a partially enlarged view of fig. 4.

In the figure, 1 is a housing, 11 is a mounting opening, 111 is a clamping piece, 12 is a second elastic arm, 13 is a second window, 14 is a bottom recess, 2 is a U-shaped iron, 21 is a side wall, 22 is a wire passing part, 3 is a permanent magnet, 4 is a washer, 5 is a voice coil framework, 51 is a voice coil, 511 is a nylon wire, 6 is a centering disk, 61 is a third fixing part, 621 is a third window, 622 is a first fixing part, 623 is a second fixing part, 63 is a cylindrical part, 64 is a first elastic arm, 65 is a first window, 7 is a vibrating diaphragm component, 71 is a folded ring, 72 is a body, 8 is a dust cap, and 9 is a signal access terminal.

Detailed Description

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

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to an embodiment of the present disclosure, there is provided a sound emitting device, as shown in fig. 1, including:

a housing 1, a magnetic circuit system and a vibration system are arranged on the housing 1, the vibration system is conducted with an external circuit through a signal access terminal 9 arranged on the housing 1,

the vibration system comprises a vibrating diaphragm component 7, a voice coil component and a centering support piece 6; the voice coil assembly and the damper 6 are fixedly connected with the diaphragm assembly 7 in the vibration direction of the sound generating device, and the damper 6 is located outside the voice coil assembly in the direction perpendicular to the vibration direction of the sound generating device;

the magnetic circuit system is provided with a wire passing part 22, and a lead wire 511 connected to the voice coil assembly penetrates out of the magnetic circuit system and extends to the signal access terminal 9 to be electrically connected with the signal access terminal 9.

In this embodiment, the housing 1 serves as a carrier of the entire sound generating device, and the entire sound generating device is of a concave structure, and the rest of the components of the sound generating device are limited in the housing 1 after the sound generating device is assembled. The vibration system and the magnetic circuit system are matched to enable the sound production device to produce vibration.

The lead wire 511 on the voice coil assembly is led out from the crossover part 22 on the magnetic circuit system and is electrically connected with the signal access terminal 9. This prevents the tinsel wire 511 from passing around the upper part of the magnetic circuit system, eliminating the increased structural thickness of the tinsel wire 511. And the bending degree of the silk thread 511 is reduced, and the silk thread 511 is prevented from being broken or damaged in the vibration process.

In one embodiment, the diaphragm assembly 7 includes a corrugated rim 71 and a body 72, which are combined together, the voice coil assembly includes a cylindrical voice coil bobbin 5 and a voice coil 51 wound outside the voice coil bobbin 5, and the body 72 is fixedly connected to the voice coil bobbin 5.

In this embodiment, the voice coil bobbin 5 of the diaphragm assembly 7 is fixedly connected to the body to support the voice coil bobbin 5. And the voice coil 51 plays a role of vibration in the magnetic gap to drive the voice coil framework 5 to vibrate, and the voice coil framework 5 drives the vibrating diaphragm component 7 to vibrate.

In one embodiment, an angle between the body and an axial direction of the voice coil bobbin is greater than 60 °. In the angle range, the cone can keep a small inclination close to a plane. The height of the device can be minimized from the structure of the diaphragm assembly 7.

In one embodiment, as shown in fig. 1, the magnetic circuit system comprises a U-shaped iron 2 and a permanent magnet 3, the U-shaped iron 2 comprises a bottom plate and a side wall 21, the bottom plate and the side wall 21 form an accommodating cavity, and the permanent magnet 3 is fixed in the accommodating cavity and forms a magnetic gap with the side wall 21; the wire passing part 22 is arranged on the side wall 21 of the U-shaped iron 2.

In this embodiment, the magnetic gap formed between the U-iron 2 and the permanent magnet 3 is used to interact with the energized voice coil 51 to generate vibrations. The threading part 22 is used for leading out the chinlon thread 511.

In one example, the washer 4 is arranged on the upper part of the permanent magnet 3, and a magnetic gap is formed between the washer 4 and the side wall 21.

In one embodiment, as shown in fig. 1 and 5, a mounting opening 11 is formed in the bottom of the housing 1, a clip 111 is arranged in the mounting opening 11, and the clip 111 is fixed to the wire passing portion 22 of the U-shaped iron 2.

In this embodiment, the U-shaped iron 2 is placed through the mounting opening 11 at the bottom of the housing 1, and the bottom of the U-shaped iron 2 is fixed to the bottom of the housing 1 from the position of the wire passing portion 22. For example, the fixing may be performed by welding or heat fusion.

For example, the clip 111 has a bent structure, and the bent structure is fixed to the wire passage portion 22.

The clamping piece 111 with the bending structure can facilitate the positioning of the U-shaped iron during installation and the accurate fixation with the wire passing part 22.

In one embodiment, as shown in fig. 5, the bottom of the U-iron 2 and the bottom of the housing 1 are flush on the outside after fixation.

The flush bottom eliminates the extra height of the device caused by the bottom of the U-bar 2 protruding out of the housing 1.

The side wall 21 is divided into a plurality of portions by the wire passing portion 22, and the magnetic lines of force are more easily concentrated by the side walls of the plurality of portions, so as to improve the performance of the sound generating device.

In one embodiment, as shown in fig. 1, the side wall 21 of the U-shaped iron 2 is a cylindrical structure, and the bottom plate is fixed with one end of the side wall 21 to form a containing cavity. The plurality of uniformly distributed wire passing parts 22 on the side wall 21 can meet the requirement that the lead wires 511 led out from the voice coil 51 in different directions are connected with the signal access terminal 9.

In one embodiment, as shown in fig. 1, 4 wire passing portions 22 are provided on the side wall 21. The 4 wire passing parts 22 divide the side wall 21 into 4 uniform sections, so that magnetic lines of force in the magnetic circuit system can be concentrated better.

In other examples, the wire passing part 22 may have one of a U shape, a rectangular shape, and a V shape, and may have other shapes. The different shapes of the threading part 22 can meet the aim of reducing the assembly height of the leading-out nylon wire 511 of the threading part 22.

In other examples, the wire passing portion 22 may also be a notch, and a through hole structure, or the structures may be combined with each other.

For example, the side wall 21 is provided with a plurality of through holes uniformly distributed along the side wall, and the lead wire 511 is led out from the through holes, so that the purpose of reducing the assembly height can be met.

In one embodiment, as shown in fig. 2, a cylindrical portion 63 is disposed inside the centering branch 6, and the top of the cylindrical portion 63 is connected to the diaphragm assembly 7; the centering branch piece 6 further comprises a first fixing part 622 and a second fixing part 623 for fixing with the silk thread 511.

In this embodiment, when the damper 6 is mounted, the top of the cylindrical portion 63 and the diaphragm assembly 7 are fixedly connected.

Wherein, the upper portion of voice coil skeleton 5 is also fixed on vibrating diaphragm subassembly 7, and vibrating diaphragm subassembly 7 middle part is formed with hollow structure, and voice coil skeleton 5 is fixed in the hollow structure on vibrating diaphragm subassembly 7.

For example, the outer side wall of the upper portion of the voice coil bobbin 5 is fixed to the inner wall of the hollow structure.

And a dust cap 8 is arranged on the hollow structure of the diaphragm component 7 for sealing.

In one embodiment, the first fixing portion 622 is the bottom of the cylindrical portion 63, and the second fixing portion 623 is located at a first connecting point of the centering branch 6 and the housing 1; the lead wire 511 is fixed to the first fixing portion 622 and the second fixing portion 623 respectively after penetrating out of the wire passing portion 22 of the U-shaped iron 2. For example, the fixing may be performed by dispensing. Other securing means are also possible.

As shown in fig. 5, the first connecting point is a position where the lower surface of the second fixing portion 623 contacts the housing 1.

Obviously, the lead wire 511 means that the lead wire led out from the voice coil 51 is coated with a layer of wire to increase the strength. Whereas the 2-time fixing on the centring disk 6 makes it possible to reduce the amplitude of the oscillation of the silk thread 511 to avoid breakage during oscillation.

In one embodiment, as shown in fig. 2, the damper 6 further includes a third fixing portion 61, the third fixing portion 61 is located at a second connection point with the housing 1, a plurality of first elastic arms 64 are disposed between the third fixing portion 61 and the second fixing portion 623, the plurality of first elastic arms 64 are close to the edge of the damper 6, and a first window 65 is formed between two adjacent first elastic arms 64; the signal access terminal 9 is injection-molded at a position of the housing 1 corresponding to the first window 65. Wherein, as shown in fig. 5, the second connection point is the position of the outermost circle of the centering chip clamped by the diaphragm assembly 7 and the housing 1.

In this embodiment, the third fixing portion 61 is fixed to the edge of the housing 1 at the time of assembly. A plurality of first elastic arms 64 are formed between the third fixing portion 61 and the second fixing portion 623, and a first window 65 is formed between adjacent first elastic arms 64. The first elastic arm 64 and the first window 65 are formed to be symmetrical around the center of the centering branch 6 and uniformly distributed. Therefore, the first elastic arms 64 are stressed uniformly in the vibration process, and the vibration of the centering branch piece 6 is more stable.

In one embodiment, a plurality of third elastic arms are disposed between the first fixing portion 622 and the second fixing portion 623, and a third window 621 is formed between the plurality of third elastic arms; after being fixed to the first fixing portion 622, the lead wire 511 continues to extend to the second fixing portion 623 through the third window 621, and after being fixed, the lead wire is electrically connected to the signal access terminal 9 through the first window 65.

In this embodiment, the third elastic arm formed between the first fixing portion 622 and the second fixing portion 623 is used as a support, and a third window 621 formed between adjacent third elastic arms is used for leading out the silk thread 511 led out from the wire passing portion 22, and after passing through the third window 621, the silk thread passes through the first window 65 and is electrically connected with the signal access terminal 9.

Such a configuration enables the silk thread 511 to pass directly through the centring disk 6 without having to pass around the centring disk 6. The structural thickness of the lead wire 511 generated when the lead wire is wound around the centering branch piece 6 is reduced.

In the prior art, the silk thread is wound from the top of the side wall. The lead wire increases the thickness of the structure in the height direction, and the lead wire is bent greatly. Are easily damaged.

In the above embodiment, the lead wire 511 is led out from the voice coil 51 and passes through the U-shaped iron 2 along the wire passing portion 22. Therefore, the silk thread 511 is prevented from being wound from the upper part of the U-shaped iron 2, the assembly steps of winding are reduced, the thickness of the winding is saved, and the integral height of the sound production device is reduced. The silk thread 511 is then positioned below the centring disk 6, and the silk thread 511 then passes through the third window 621 to reach above the centring disk 6. And finally out of the first window 65 to be connected to the signal access terminal 9 to communicate with an external circuit. Therefore, the lead wire 511 is externally connected to a circuit, and simultaneously, the space which is separately provided for leading out the lead wire 511 in the height direction of the shell 1 is saved. Again reducing the overall height of the sound generating device.

In other examples, 2 symmetrical third windows 621 may be provided on the centering branch 6 to enable the silk thread 511 to be drawn out from both sides. A plurality of third windows 621 may also be disposed on the stiffener 6, and the third windows 621 are uniformly distributed around the through holes on the stiffener 6. This can facilitate the lead-in wire 511 to be brought out from a number of different positions during assembly.

In one embodiment, as shown in fig. 2 and 5, the top of the cylindrical part 63 is bent inward, and the bent surface is fixed to the diaphragm assembly 7. The face that forms after buckling is bigger for the area that directly fixed, with the laminating of vibrating diaphragm subassembly 7, can increase the fixed intensity of centering branch piece 6.

In one embodiment, as shown in fig. 1, the first resilient arm 64 is bent downward along the third fixing portion 61 and forms a recess with respect to the cylindrical portion 63 and the third fixing portion 61. In the recessed structure, the top of the cylindrical portion 63 is flush with the third fixing portion 61.

In this embodiment, such a structure can be matched to the structure of the housing 1 to reduce the size of the structure in the height direction.

In other examples, the second elastic arms 12 are provided at positions of the housing 1 opposite to the first elastic arms 64, and the second windows 13 are formed between the adjacent second elastic arms 12. The second window 13 both reduces the weight of the housing 1 and saves material. But also can be used as an observation port for observing the internal assembly structure during assembly. The assembly is convenient.

For example, the housing 1 is provided with a plurality of second elastic arms 12, and a second window 13 is formed between adjacent second elastic arms 12. Wherein, the first elastic arms 64 and the second elastic arms 12 are distributed in the same way, and the first windows 65 are communicated with the second windows 13.

The second elastic arm 12 is bent downward to form a concave, so that the first elastic arm 64 on the centering lug 6 can be matched with the second elastic arm 12 on the shell 1. The assembly can be simplified, and the integral height of the structure blocking and increasing device can be avoided.

When the sound emitting device is assembled, the first window 65 and the second window 13 can be used as an observation port to observe the assembly of the internal structure. To check that the assembly is correct.

In one embodiment, the thickness of the sound-producing device is less than or equal to 10 mm. After the sound-generating device is assembled by the structure, the whole thickness of the sound-generating device can be less than or equal to 10 mm, and the thickness of the sound-generating device is greatly reduced compared with the thickness of the sound-generating device in the prior art.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A sound generating device comprising: the shell, install magnetic circuit and vibration system on the shell, vibration system is through setting up signal access terminal on the shell switches on its characterized in that with external circuit:

2. The sound generating device according to claim 1, wherein the diaphragm assembly comprises a hinge ring and a body which are combined together, the voice coil assembly comprises a cylindrical voice coil bobbin and a voice coil wound outside the voice coil bobbin, and the body is fixedly connected with the voice coil bobbin.

3. The apparatus according to claim 2, wherein an angle between the body and an axial direction of the voice coil bobbin is greater than 60 °.

4. The sound production device as claimed in claim 1, wherein a cylindrical portion is provided inside the centering branch, and a top portion of the cylindrical portion is connected to the diaphragm assembly.

5. The sounding device according to claim 4, wherein the magnetic circuit system comprises a U-shaped iron and a permanent magnet, the U-shaped iron comprises a bottom plate and a side wall, the bottom plate and the side wall form an accommodating cavity, and the permanent magnet is fixed in the accommodating cavity and forms a magnetic gap with the side wall; the wire passing part is arranged on the side wall of the U-shaped iron.

6. The sound generating apparatus according to claim 5, wherein said first fixing portion is a bottom portion of said cylindrical portion, and said second fixing portion is located at a first connecting point of said centering branch piece and said housing; the lead wire threads are fixed with the first fixing part and the second fixing part respectively after penetrating out of the wire passing part of the U-shaped iron.

7. The apparatus according to claim 6, wherein a plurality of third resilient arms are disposed between said first and second fixed portions, and a third window is formed between said third resilient arms; and after being fixed with the first fixing part, the lead wire continues to extend to the second fixing part through the third window, and after being fixed, the lead wire is electrically connected with the signal access terminal through the first window.

8. The sounding device according to claim 5, wherein a mounting opening is formed in the bottom of the housing, a clamping piece is arranged in the mounting opening, and the clamping piece is fixed with the wire passing part of the U-shaped iron.

9. The sound-emitting device according to claim 1, wherein the thickness of the sound-emitting device is less than or equal to 10 mm.