CN113194390A

CN113194390A - Sound producing device

Info

Publication number: CN113194390A
Application number: CN202110444266.5A
Authority: CN
Inventors: 王莹; 郭晓冬
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-07-30
Also published as: WO2022222489A1

Abstract

The invention discloses a sound production device, which comprises a high-pitch vibration system, a low-pitch vibration system, a magnet yoke and a magnetic circuit system, wherein the high-pitch vibration system is connected with the magnet yoke; the magnetic yoke comprises a bottom wall and a side wall extending from the bottom wall to a position close to the treble vibration system, and the bass vibration system and the treble vibration system are respectively arranged on two opposite sides of the magnetic yoke; magnetic circuit is including locating main magnet steel on the diapire, main magnet steel is close to high pitch vibration system's one end is provided with dodges the step, high pitch vibration system's high pitch voice coil loudspeaker voice coil inserts dodge the step with in the first magnetic gap that the lateral wall encloses. The sound production device disclosed by the invention is small in size, wide in audio frequency bandwidth and concentrated in effective magnetic field.

Description

Sound producing device

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a sound production device.

Background

In order to achieve perfect sound effect, the speaker of the existing partial electronic equipment combines the bass unit and the treble unit, so that the low-frequency part and the high-frequency part of the audio can be presented fully and perfectly, and the bandwidth is fully expanded. Referring to fig. 1, in the prior art, a bass unit and a treble unit share a magnetic circuit system, and the bass unit and the treble unit are respectively disposed on two opposite sides of a magnetic yoke, so as to ensure that a sound-generating device has a small size, the magnetic circuit system needs to be compressed, and thus the magnetic flux is small, which affects the sound-generating device to generate sound.

Therefore, it is desirable to provide a novel sound generating device to solve the above technical problems.

Disclosure of Invention

The invention mainly aims to provide a sound production device, and aims to solve the technical problem that the sound production device with a high-pitch unit and a low-pitch unit has small magnetic flux due to the fact that the volume of a magnetic circuit system is compressed.

In order to achieve the above object, the present invention provides the sound generating apparatus comprising:

a treble vibration system and a bass vibration system;

the magnetic yoke comprises a bottom wall and a side wall extending from the bottom wall to the position close to the high-pitch vibration system, and the low-pitch vibration system and the high-pitch vibration system are respectively arranged on two opposite sides of the magnetic yoke;

magnetic circuit, including locating main magnet steel on the diapire, main magnet steel is close to treble vibration system's one end is provided with dodges the step, treble vibration system's high pitch voice coil loudspeaker voice coil inserts dodge the step with in the first magnetic gap that the lateral wall encloses.

Optionally, the main magnetic steel includes a first magnetic steel disposed on the bottom wall and a second magnetic steel disposed on the first magnetic steel, and along a vibration direction of the high pitch voice coil, a cross-sectional area of the first magnetic steel is larger than a cross-sectional area of the second magnetic steel, and a second side surface of the second magnetic steel opposite to the side wall, a top surface of the high pitch vibration system facing the first magnetic steel, and the side wall enclose the first magnetic gap.

Optionally, the first magnetic steel comprises a bottom surface and a first side surface, wherein the bottom surface is opposite to the top surface, the first side surface is connected with the bottom surface and the top surface, the bottom surface is connected with the bottom wall, and the first side surface is abutted to the side wall.

Optionally, the yoke still includes certainly the lateral wall is to keeping away from the installation department that main magnet steel direction extends, high pitch vibration system including set firmly in high pitch vibrating diaphragm on the installation department, the drive of high pitch voice coil loudspeaker voice coil high pitch vibrating diaphragm vibration sound production.

Optionally, the high pitch diaphragm is a planar metal diaphragm.

Optionally, the treble vibration system is still including locating treble collar on the installation department, the border of treble vibrating diaphragm set firmly in on the treble collar.

Optionally, the magnetic circuit system further includes an auxiliary magnetic steel disposed around the main magnetic steel, the auxiliary magnetic steel and the main magnetic steel are respectively disposed on two sides of the side wall, and a bass voice coil of the bass vibration system is inserted into a second magnetic gap defined between the auxiliary magnetic steel and the side wall.

Optionally, vice magnet steel is located on the installation department, vice magnet steel with the high pitch vibrating diaphragm branch is located the relative both sides of installation department.

Optionally, the magnetic circuit system further includes an auxiliary washer disposed on the auxiliary magnetic steel, the bass vibration system includes a bass diaphragm disposed on the auxiliary washer, and the bass voice coil drives the bass diaphragm to vibrate and produce sound.

Optionally, a bass rear cavity is formed between the bass diaphragm and the magnetic yoke, and a sound outlet hole is formed in the magnetic yoke and communicated with the bass rear cavity and an external space.

In the invention, the high-pitch vibration system and the low-pitch vibration system are respectively arranged on the two sides of the magnetic circuit system, so that the high-pitch vibration system can output high pitch and the low-pitch vibration system can output low pitch through one sound generating device, and the sound generating bandwidth of the sound generating device is improved; the high-pitch vibration system and the low-pitch vibration system share the same magnetic circuit system, so that the size of the sound production device is reduced; the step is avoided through the arrangement, so that the volume of the main magnetic steel can be improved to the maximum extent, the magnetic flux of the main magnetic steel is increased, and the effective magnetic field is concentrated.

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 structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a sound generating device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a disassembled structure of an embodiment of the sound generating device of the present invention;

FIG. 3 is a schematic cross-sectional view of the sound generator of FIG. 1 along line A-A;

FIG. 4 is an enlarged schematic view of a portion B of the sound generator shown in FIG. 3;

fig. 5 is an enlarged schematic structural view of a part of the sound generating device C shown in fig. 3.

Examples reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound producing device	1	High-pitch vibration system
11	High pitch voice coil	13	High-pitch vibrating diaphragm
				15	High pitch mounting ring	3	Bass vibration system
31	Bass voice coil	33	Bass vibrating diaphragm
				35	Bass mounting ring	5	Magnetic yoke
51	Bottom wall	54	Sound outlet hole
				53	Side wall	551	First fixed seat
55	Mounting part	521	Trough side wall
				552	Ventilation trough	553	Second fixed seat
523	Trough bottom wall	71	Main magnetic steel
				7	Magnetic circuit system	7111	The top surface
711	First magnetic steel	7115	First side surface
				7113	Bottom surface	7131	Second side surface
713	Second magnetic steel	72	First magnetic gap
				715	Avoiding step	74	Second magnetic gap
73	Auxiliary magnetic steel	96	Main washer
				75	Sub washer	9	Front cover
91	Passive diaphragm

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in 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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a sound production device.

Referring to fig. 1 to 5, a sound generating apparatus 100 according to an embodiment of the present invention includes a treble vibration system 1, a bass vibration system 3, a yoke 5, and a magnetic circuit system 7; the magnetic yoke 5 comprises a bottom wall 51 and a side wall 53 extending from the bottom wall 51 to be close to the treble vibration system 1, and the bass vibration system 3 and the treble vibration system 1 are respectively arranged at two opposite sides of the magnetic yoke 5; the magnetic circuit system 7 comprises a main magnetic steel 71 arranged on the bottom wall 51, an avoiding step 715 is arranged at one end of the main magnetic steel 71 close to the high-pitch vibration system 1, and the high-pitch voice coil 11 of the high-pitch vibration system 1 is inserted into a first magnetic gap 72 enclosed by the avoiding step 715 and the side wall 53.

Specifically, bass vibration system 3 includes bass vibrating diaphragm 33 and supports bass voice coil 31 of bass vibrating diaphragm 33 vibration, treble vibration system 1 includes treble vibrating diaphragm 13 with the vibration of support treble vibrating diaphragm 13 with 7 looks intervals of magnetic circuit, treble voice coil 11 and bass voice coil 31 are connected with external circuit electricity respectively, treble voice coil 11 and bass voice coil 31 circular telegram, under the influence of the produced magnetic field of magnetic circuit 7, bass voice coil 31 and treble voice coil 11 vibrate respectively, thereby can drive bass vibrating diaphragm 33 and treble vibrating diaphragm 13 vibration sound production respectively. In the present embodiment, the bass vibration system 3 and the treble vibration system 1 are compared with each other. The sound generating device 100 may be directly installed in the electronic apparatus, and the bass voice coil 31 and the treble voice coil 11 are electrically connected to a control main board of the electronic apparatus, respectively. The sound generating apparatus 100 may also be assembled in a housing having a sound outlet channel to form a sound generating module, and then the sound generating module is disposed in the electronic device.

The treble voice coil 11 vibrates in the first magnetic gap 72, and when the treble diaphragm 13 has a large amplitude, the end of the treble voice coil 11 close to the bass vibration system 3 may contact the avoiding step 715, so that the skilled person sets the depth of the first magnetic gap 72 according to the maximum amplitude of the treble diaphragm 13, that is, sets the height of the avoiding step 715 in the vibration direction of the bass voice coil 31 according to the maximum amplitude of the treble diaphragm 13.

In the invention, the high-pitch vibration system 1 and the low-pitch vibration system 3 are respectively arranged on two sides of the magnetic circuit system 7, so that the high-pitch vibration system 1 can output high pitch and the low-pitch vibration system 3 can output low pitch through one sound generating device 100, and the sound generating bandwidth of the sound generating device 100 is improved; the same magnetic circuit system 7 is shared by the high-pitch vibration system 1 and the low-pitch vibration system 3, so that the size of the sound production device 100 is reduced; by arranging the avoidance step 715, the volume of the main magnetic steel 71 can be increased to the greatest extent, the magnetic flux of the main magnetic steel 71 is increased, and the effective magnetic field is concentrated.

Referring to fig. 2 to 5, the main magnetic steel 71 includes a first magnetic steel 711 disposed on the bottom wall 51 and a second magnetic steel 713 disposed on the first magnetic steel 711, and along the vibration direction of the high pitch voice coil 11, the cross-sectional area of the first magnetic steel 711 is greater than that of the second magnetic steel 713; a second side face 7131 of the second magnetic steel 713 opposite to the side wall 53, a top face 7111 of the treble vibration system 1 facing the first magnetic steel 711, and the side wall 53 enclose the first magnetic gap 72. In the present embodiment, the avoiding step 715 in the main magnet 71 is formed by stacking two magnets with different sizes, wherein the avoiding step 715 is formed by disposing a second magnet 713 with a smaller size on the first magnet 711. In other embodiments, the main magnet steel 71 may be a single piece. In the embodiment shown in fig. 2, the first magnetic steel 711 and the second magnetic steel 713 are cylindrical, the diameter of the first magnetic steel 711 is larger than that of the second magnetic steel 713, and the first magnetic steel 711 and the second magnetic steel 713 are coaxially arranged. A main washer 76 is also arranged on the first magnetic steel 711 to optimize the magnetic field.

First magnet steel 711 include with bottom surface 7113 that top surface 7111 set up relatively, and connect bottom surface 7113 with the first side 7115 of top surface 7111, bottom surface 7113 with diapire 51 is connected, first side 7115 with lateral wall 53 butt. In order to increase the magnetic flux in the sound generating device 100 as much as possible in a limited space, the first magnetic steel 711 is sized to be the maximum size that can be accommodated in the yoke 5, so that the first side face 7115 abuts against the side wall 53.

Yoke 5 still includes certainly lateral wall 53 is to keeping away from installation department 55 that main magnet steel 71 direction extends, high pitch vibration system 1 is including setting firmly in high pitch vibrating diaphragm 13 on the installation department 55, high pitch voice coil 11 drive high pitch vibrating diaphragm 13 vibration sound production. The high pitch diaphragm 13 may be a planar diaphragm or a diaphragm having a corrugated structure, and the high pitch diaphragm 13 may be made of rubber, paper, or the like. In an embodiment, the high-pitched sound diaphragm 13 is a planar metal diaphragm, and the planar metal diaphragm is configured to be beneficial to further reduce the size of the sound generating apparatus 100, and the material of the planar metal diaphragm may be one or more of stainless steel, silicon steel, carbon steel, iron-nickel alloy, iron-cobalt-vanadium alloy, and soft magnetic ferrite. Compared with the vibrating diaphragm made of rubber or paper, when the vibrating diaphragm made of metal material vibrates, the sent tone quality has metal texture. The damping layer may be made of damping glue, polyester film or other polymer, or polyurethane resin. The damping of the plane metal vibrating diaphragm can be adjusted through the damping layer, so that the balance of the vibration of the plane metal vibrating diaphragm is facilitated, and a finer and finer listening feeling is brought. The planar metal diaphragm has a small amplitude when vibrating, so that the required space of the first magnetic gap 72 is small, which is beneficial to further increasing the size of the main magnetic steel 71, thereby increasing the magnetic flux.

Referring to fig. 4, the treble vibration system 1 further includes a treble mounting ring 15 disposed on the mounting portion 55, and an edge of the treble diaphragm 13 is fixedly disposed on the treble mounting ring 15. In this embodiment, the mounting portion 55 includes a first fixing base 551 connected to the side wall 53 and a second fixing base 553 disposed around the first fixing base 551, the second fixing base 553 is provided with a ventilation groove 552 with an opening facing away from the direction of the bass vibration system 3, a first mounting step (not shown) is disposed on an edge of the first fixing base 551 close to the ventilation groove 552, the treble mounting ring 15 is disposed on the first mounting step, and an edge of the treble diaphragm 13 is fixed on the treble mounting ring 15, so that the treble diaphragm 13 is suspended on the first fixing base 551.

The magnetic circuit system 7 further includes a secondary magnetic steel 73 disposed around the primary magnetic steel 71, the secondary magnetic steel 73 and the primary magnetic steel 71 are disposed on two sides of the side wall 53, and the bass voice coil 31 of the bass vibration system 3 is inserted into a second magnetic gap 74 defined between the secondary magnetic steel 73 and the side wall 53. In this embodiment, the secondary magnetic steel 73 is annular, in other embodiments, the secondary magnetic steel 73 may have other shapes, the number of the secondary magnetic steels 73 may be multiple, and the multiple secondary magnetic steels 73 are disposed around the primary magnetic steel 71.

Referring to fig. 5, the auxiliary magnetic steel 73 is disposed on the mounting portion 55, and the auxiliary magnetic steel 73 and the high-pitched sound diaphragm 13 are disposed on two opposite sides of the mounting portion 55. Specifically, the secondary magnet 73 is disposed on the second fixing base 553, one side of the second fixing base 553 encloses a vent groove 552 having an opening, and the opposite side thereof is connected to the secondary magnet 73, thereby achieving the simultaneous fixing of the primary magnet 71, the secondary magnet 73 and the tweeter diaphragm 13 by one yoke 5.

Magnetic circuit 7 is still including locating vice china 75 on vice magnet steel 73, bass vibration system 3 is including locating bass diaphragm 33 on vice china 75, bass voice coil 31 drive bass diaphragm 33 vibration sound production. In an embodiment, one end of the sub-washer 75, which is far away from the second magnetic gap 74, is provided with a second mounting step (not labeled), the bass vibration system 3 further includes a bass mounting ring 35 disposed on the second mounting step, the bass diaphragm 33 includes a central portion, a ring-folded portion and a connecting portion, which are sequentially disposed from inside to outside, the connecting portion is fixedly disposed on the bass mounting ring 35, the area of the bass diaphragm 33 is increased to the greatest extent by disposing the bass mounting ring 35 at an end of the sub-washer 75, which is far away from the second magnetic gap 74, and the loudness of the sound generating apparatus 100 is increased.

Referring to fig. 2 and 3, in an embodiment, the sound generating apparatus 100 further includes a front cover 9 covering the side of the magnetic yoke 5 close to the bass vibration system 3, the front cover 9 is provided with a plurality of sound output holes, the sound generating apparatus 100 further includes a passive diaphragm 91 opposite to the bass diaphragm 33, an edge of the passive diaphragm 91 is fixed on the front cover 9, and when the bass diaphragm 33 vibrates, the flowing air pushes the passive diaphragm 91 to vibrate together, so as to improve sound quality.

Referring to fig. 4, a bass back cavity is enclosed between the bass diaphragm 33 and the magnetic yoke 5, and a sound outlet 54 is formed on the magnetic yoke 5 to communicate the bass back cavity with an external space. Specifically, the sound outlet hole 54 is opened in the groove bottom wall 523 of the ventilation groove 552 and the groove side wall 521 near the first magnetic gap 72, the first fixing seat 551 and the second fixing seat 553 have a certain height difference, so that the treble mounting ring 15 is disposed at the end of one groove side wall 521, the auxiliary magnetic steel 73 is disposed at the side of the groove bottom wall 523 away from the opening, and the first magnetic gap 72 is communicated with the external space through the sound outlet hole 54 disposed in the groove side wall 521 or the groove bottom wall 523. The bass diaphragm 33 vibrates to push the airflow to go out the sound through the sound outlet hole opened on the same side as the treble diaphragm 13, so that the bass diaphragm 33 and the treble diaphragm 13 are sounded from the same side of the sounding device 100.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound generating device, the sound generating device comprising:

a treble vibration system and a bass vibration system;

2. The apparatus according to claim 1, wherein said main magnetic steel comprises a first magnetic steel disposed on said bottom wall and a second magnetic steel disposed on said first magnetic steel, wherein a cross-sectional area of said first magnetic steel is larger than a cross-sectional area of said second magnetic steel along a vibration direction of said high pitch voice coil, and a second side surface of said second magnetic steel opposite to said side wall, a top surface of said first magnetic steel facing said high pitch vibration system, and said side wall enclose said first magnetic gap.

3. The sound generating device according to claim 2, wherein said first magnetic steel comprises a bottom surface disposed opposite to said top surface and a first side surface connecting said bottom surface and said top surface, said bottom surface being connected to said bottom wall, said first side surface being abutted to said side wall.

4. The sound generating apparatus as claimed in claim 1, wherein the yoke further comprises a mounting portion extending from the side wall in a direction away from the main magnet steel, the treble vibration system includes a treble diaphragm fixedly mounted on the mounting portion, and the treble voice coil drives the treble diaphragm to vibrate and generate sound.

5. The sound generating apparatus of claim 4, wherein the tweeter diaphragm is a flat metal diaphragm.

6. The sound generating apparatus of claim 4, wherein the treble vibration system further comprises a treble mounting ring disposed on the mounting portion, and wherein an edge of the treble diaphragm is fixedly disposed on the treble mounting ring.

7. The sound generating apparatus as claimed in any one of claims 1 to 6, wherein the magnetic circuit system further comprises a secondary magnetic steel disposed around the primary magnetic steel, the secondary magnetic steel and the primary magnetic steel are disposed on two sides of the side wall, and a bass voice coil of the bass vibration system is inserted into a second magnetic gap defined between the secondary magnetic steel and the side wall.

8. The sound generating apparatus of claim 7, wherein said auxiliary magnetic steel is disposed on said mounting portion, and said auxiliary magnetic steel and said tweeter diaphragm are disposed on opposite sides of said mounting portion.

9. The apparatus according to claim 8, wherein the magnetic circuit system further comprises a secondary washer disposed on the secondary magnet, the bass vibration system comprises a bass diaphragm disposed on the secondary washer, and the bass voice coil drives the bass diaphragm to vibrate and generate sound.

10. The sound-generating apparatus as claimed in claim 9, wherein a bass back cavity is formed between the bass diaphragm and the magnetic yoke, and the magnetic yoke is provided with a sound outlet hole communicating the bass back cavity with an external space.