CN115209319A

CN115209319A - Sound production device

Info

Publication number: CN115209319A
Application number: CN202210833537.0A
Authority: CN
Inventors: 葛帅; 罗明亚; 张圆媛; 李雪; 魏孝祥
Original assignee: Merry Technology Suzhou Co Ltd
Current assignee: Merry Technology Suzhou Co Ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2022-10-18
Also published as: TW202315421A

Abstract

The embodiment of the invention discloses a sound production device. The sound generating device comprises a magnetic circuit system, a vibration system and a supporting system for connecting the magnetic circuit system and the vibration system. Wherein, the vibration system includes: voice coil, resonance ring, vibration board, adhesive layer and intermediate pasting board. The middle pasting plate is bonded on the vibrating plate through the bonding layer, the resonance ring is connected between the voice coil and the vibrating plate, and the voice coil drives the whole vibrating system to vibrate after being electrified. Because the resonance ring has higher rigidity, the integral rigidity of the vibration system is improved after the resonance ring is added, so that the resonance frequency of the system is improved, the initial frequency of acoustic attenuation in an acoustic response curve is increased, and the occurrence frequency of a sharp peak of the acoustic response curve is improved and exceeds the audible sound range of human ears, thereby achieving the effects of extending high-frequency sensitivity and improving the use experience of a user.

Description

Sound production device

Technical Field

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

Background

Since the invention of the loudspeaker, how to design a high-performance loudspeaker to improve the hearing feeling of consumers is always a research hotspot of electroacoustic engineers.

The vibration system of the conventional speaker is often formed by directly bonding a voice coil to a vibration plate. Fig. 1 is a frequency response curve diagram of a conventional loudspeaker, and the circle mark in fig. 1 is a resonance frequency generation position of the conventional loudspeaker, and it can be seen from fig. 1 that, at the resonance frequency of the conventional loudspeaker, not only the acoustic response curve of a single body is attenuated, but also a significant valley is correspondingly present in the acoustic response curve of the cabinet. The auditory effect of the human ear in actual use feels that the sound at this time is weak in extension.

Disclosure of Invention

In view of this, the present invention provides a sound generating device, which can extend high frequency sensitivity, thereby improving the acoustic effect of the sound generating device.

In a first aspect, an embodiment of the present invention provides a sound generating apparatus, where the sound generating apparatus includes a magnetic circuit system, a vibration system, and a supporting system connecting the magnetic circuit system and the vibration system; wherein the vibration system comprises:

a voice coil;

a diaphragm positioned above the voice coil, the diaphragm vibrating following the voice coil;

a resonance ring connected between the voice coil and the diaphragm;

and the middle pasting plate is connected above the vibration plate.

Further, the resonance ring comprises a plurality of resonance sheets distributed in a ring shape.

Further, the rigidity of the diaphragm and the rigidity of the voice coil are both smaller than the rigidity of the resonance ring.

Further, the resonance ring is made of alloy materials.

Further, the diaphragm includes a folded ring, the resonance ring is connected to an inner side of the folded ring, and a width of the resonance ring is equal to or greater than a width of the voice coil.

Furthermore, the magnetic circuit system comprises a main magnet and a plurality of auxiliary magnets, the plurality of auxiliary magnets are annularly distributed on the outer side of the main magnet, a magnetic gap area is formed between the plurality of auxiliary magnets and the main magnet, and the voice coil extends into the magnetic gap area.

Furthermore, the magnetic circuit system further comprises a main pole piece positioned on the main magnet, a plurality of auxiliary pole pieces respectively positioned on each auxiliary magnet, and a lower pole piece positioned on the lower sides of the main magnet and the auxiliary magnets;

the lower pole piece is used for sealing magnetic lines generated by the main magnet and the plurality of auxiliary magnets, and the plurality of auxiliary pole pieces and the main pole piece are used for magnetic conduction so as to concentrate magnetic fields of the main magnet and the plurality of auxiliary magnets into gaps between the main magnet and the plurality of auxiliary magnets.

Furthermore, the supporting system comprises a supporting frame, the supporting frame comprises an accommodating cavity for accommodating the magnetic circuit system and the vibration system, a connecting boss is circumferentially arranged at the top of the accommodating cavity, and the vibration plate is connected to the connecting boss.

The embodiment of the invention provides a sound production device. The sound generating device comprises a magnetic circuit system, a vibration system and a supporting system, wherein the vibration system comprises: voice coil, vibration board, resonance ring, adhesive linkage and intermediate pasting board. The resonance ring is connected between the voice coil and the vibration plate, and the resonance ring has higher rigidity, so that the rigidity of the whole vibration system is improved after the resonance ring is added, the resonance frequency of the vibration system is improved, and the effect of extending the high-frequency sensitivity is achieved. And the voice coil can carry out the adaptability design according to the shape and the weight of resonance ring to guarantee that the voice coil can not bump with lower pole piece when circular telegram vibrates.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a graph of the sound frequency response of a conventional loudspeaker cell and cabinet;

FIG. 2 is an exploded schematic view of a sound emitting device of an embodiment of the present invention;

FIG. 3 is a cross-sectional schematic view of a vibration system of an embodiment of the present invention;

FIG. 4 is an exploded schematic view of a vibratory system with an integral resonant ring according to an embodiment of the invention;

FIG. 5 is an exploded schematic view of a vibratory system with a segmented resonant ring according to another embodiment of the invention;

fig. 6 is a graph comparing the acoustic response curves of a sound generating device according to an embodiment of the present invention and a conventional speaker.

Description of reference numerals:

1-a voice coil; 2-a vibrating plate; 3-a resonant ring; 4-middle pasting board; 5-a main magnet; 6-auxiliary magnet; 7-a main pole piece; 8-auxiliary pole piece; 9-lower pole piece; 10-a support frame; 11-adhesive layer.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the present invention.

Furthermore, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Fig. 2 is an exploded view of a sound emitting device according to an embodiment of the present invention. As shown in fig. 2, the sound generating apparatus includes: the loudspeaker comprises a middle pasting plate 4, an adhesive layer 11, a vibrating plate 2, a resonance ring 3, a voice coil 1, a main magnet 5, an auxiliary magnet 6, a main pole piece 7, an auxiliary pole piece 8, a lower pole piece 9 and a supporting frame 10. Wherein the middle attachment plate 4, the vibration plate 2, the resonance ring 3, the adhesive layer 11 and the voice coil 1 form a vibration system; the main magnet 5, the auxiliary magnet 6, the main pole piece 7, the auxiliary pole piece 8 and the lower pole piece 9 form a magnetic circuit system; the support system comprises said support frame 10.

Fig. 3 is a schematic cross-sectional view of a vibration system according to an embodiment of the present invention. As shown in fig. 3, the middle patch 4 is positioned above the vibration plate 2, and the middle patch 4 may vibrate together with the vibration plate 2 and compress air. The middle pasting plate 4 and the vibrating plate 2 are connected with each other through the bonding layer 11, dust or liquid cannot enter the interior of the vibrating system through tight bonding of the bonding layer 11, and therefore the sound generating device achieves the dustproof and waterproof effects. The vibrating plate 2 comprises a corrugated ring structure, and the corrugated ring can increase damping for the whole vibrating system, so that after a signal disappears, the sound radiation can be rapidly eliminated, and the transient response of the generating device is ensured. After the voice coil 1 is powered on, because the voice coil 1 is in a magnetic field environment, the voice coil 1 is subjected to an ampere force to perform mechanical vibration and drive the vibration plate 2 to vibrate together, and the vibration plate 2 drives the middle attachment plate 4 to vibrate, so that air is compressed and sound is generated. The resonance ring 3 is connected between the voice coil 1 and the diaphragm 2, and the resonance ring 3 increases the resonance frequency of the system by increasing the rigidity of the entire system.

In this embodiment, the resonance ring 3 has a small thickness and a light overall weight. The resonance ring 3 is placed between the voice coil 1 and the diaphragm 2, and the position of the voice coil 1 and the total weight of the vibration system are not greatly changed, so that the voice coil 1 does not collide with the lower pole piece 9 during the energization vibration and is not damaged.

In some embodiments, when the thickness of the resonance ring 3 is larger, the voice coil 1 is adapted to decrease in height; when the weight of the resonance ring 3 is large, the weight of the voice coil 1 is reduced adaptively, so that the voice coil 1 is ensured not to be damaged due to collision with the lower pole piece 9 caused by the overlarge overall height or the overweight of the vibration system during the electrified vibration. In this embodiment, the resonance ring 3 is a complete one-piece ring structure, so as to better connect the vibration plate 2 and the voice coil 1 and transmit vibration, as shown in fig. 4. The resonance ring 3 may be a circular ring, an elliptical ring, a hollow rounded rectangle, or other shapes. And the shape of the outer side of the resonant ring 3 has no correlation with the shape of the inner through hole, for example, the outer side of the resonant ring 3 may be a rounded rectangle, and the inner part thereof may be a circular hole.

In some embodiments, the resonant ring 3 is two or more resonant plates distributed in a ring shape, as shown in fig. 5. No gap may be provided between the resonance plates of the resonance ring 3, thereby making it easy to install the resonance ring 3 and securing its vibration transmitting effect. Gaps can be arranged between the resonance sheets of the resonance ring 3, so that the resonance ring 3 is ensured to have the effect of enhancing the resonance frequency of the vibration system, and simultaneously, the total weight of the vibration system is reduced, so that the vibration of the voice coil 1 is not influenced. The resonator plate may be fan-shaped, rectangular, or other shape. And the shape of the outer side of the resonance ring 3 formed by the resonance sheets has no relation with the shape of the inner through hole.

In the present embodiment, the resonance ring 3 has a large rigidity, which is larger than the rigidity of the voice coil 1 and the rigidity of the diaphragm 2. The resonance ring 3 can improve the rigidity of the whole vibration system, improve the overall resonance frequency and achieve the effect of extending the high-frequency sensitivity, so that a user can obtain better use experience when the sound generating device provided by the embodiment of the invention is used for playing high-frequency audio.

In the present embodiment, in order to make the resonant ring 3 have a large rigidity, the resonant ring 3 is made of an alloy material.

In some embodiments, the resonant ring 3 may be made of a metal material, an inorganic non-metal material, or an organic polymer material, or a composite material, according to the material of the whole vibration system and the design and usage requirements of the actual sound generating device.

In the present embodiment, the inner side and the outer side of the edge of the vibrating plate 3 are respectively provided with an inner ring and an outer ring for connecting with other components without obstructing the movement of the edge. The inner ring and the outer ring are both planar structures.

In this embodiment, the resonant ring 3 is connected to the inner ring of the vibrating plate 2, and the outer ring diameter of the resonant ring 3 is smaller than the inner ring diameter of the corrugated rim, so as to ensure that the resonant ring 3 does not obstruct the movement of the corrugated rim. The width of the resonance ring 3 is greater than or equal to the width of the voice coil 1, so that the resonance ring 3 can cover the top of the voice coil 1, and the tight connection between the resonance ring and the voice coil 1 is ensured.

In this embodiment, the resonance ring 3 may be integrally formed with the voice coil 1 or the vibration plate 2, so as to ensure the stability of the connection therebetween. The resonance ring 3 may also be bonded to the voice coil 1 or the diaphragm 2, so that the manufacturing cost is saved while the entire structure is firmly bonded.

In this embodiment, the magnetic circuit system includes the main magnet 5 and two or more secondary magnets 6, the plurality of secondary magnets 6 are annularly distributed outside the main magnet 5, and a magnetic gap region is formed between the plurality of secondary magnets 6 and the main magnet 5. The plurality of secondary magnets 6 may be combined into a complete or gapped ring magnet, such as a ring magnet in a circular shape, an elliptical shape, or a rectangular shape. The main magnet 5 can be a magnet in the shape of a circular ring, an ellipse, a rectangle, and the like. The shapes of the main magnet 5 and the plurality of auxiliary magnets 6 are matched with the shape of the voice coil 1. When the gaps between the main magnets 5 and the plurality of auxiliary magnets 6 are closer to a circular ring shape, the formed magnetic gap area is more uniform, the generated magnetic field force is more stable, and the effect of the vibration audio generated by the voice coil 1 is better. The voice coil 1 extends into the magnetic gap region.

In this embodiment, the magnetic circuit system further includes the main pole piece 7 on the main magnet 5, the auxiliary pole pieces 8 on each of the auxiliary magnets 6, and the lower pole piece 9 on the lower sides of the main magnet 5 and the auxiliary magnets 6. The lower pole piece 9 is used for sealing the magnetic lines generated by the main magnet 5 and the plurality of auxiliary magnets 6 and extending towards the direction far away from the voice coil 1, so that the magnetic field intensity in the magnetic circuit system is enhanced, and other surrounding devices are subjected to small magnetic field interference. The plurality of secondary pole pieces 8 and the primary pole piece 7 are used for magnetic conduction, so that the magnetic flux concentrated on the voice coil 1 is maximized and a uniform magnetic field is provided on the whole voice coil 1.

In this embodiment, the support system includes a support frame 10. The supporting frame 10 includes a receiving cavity for receiving and connecting the magnetic circuit system and the vibration system, a connecting boss is circumferentially disposed at a top of the receiving cavity, and the outer ring of the vibration plate 2 is connected to the connecting boss. The magnetic circuit system is positioned inside the accommodating cavity and on the lower side of the vibration system, so that a magnetic field is better provided for the voice coil 1.

In some embodiments, the support system further comprises a bottom shell (not shown). The bottom shell is connected to the lower side of the supporting frame 10, wraps the lower pole piece 9 and supports the magnetic circuit system.

Fig. 6 is a comparison graph of the single acoustic response curves of the sound generating device according to the embodiment of the present invention and the conventional speaker, and as shown in fig. 6, the resonance frequency of the whole sound generating device is increased due to the addition of the resonance ring 3, the single acoustic response curve starts to fall at a higher frequency, and the fall starting frequency is increased from 12.5kHz of the conventional speaker to 15kHz, so that the effect of extending the bandwidth is achieved. In addition, as can be seen from fig. 6, the acoustic response curve of the single body of the conventional design has a sharp peak value within less than 20kHz, while the resonance frequency of the embodiment of the present invention is increased, so that the sharp peak value of the acoustic response curve of the single body exceeds 20kHz, which exceeds the audible sound range of human ears, and the effect of the flat high-frequency acoustic response curve of the single body is achieved.

After the resonance frequency simulation is performed on the traditional loudspeaker vibration system and the vibration system in the embodiment of the invention, from the simulation result, the resonance frequency of the voice coil 1 is effectively improved by the vibration system in the embodiment of the invention. For the resonance frequency of the long side of the voice coil 1, the resonance frequency of the embodiment of the invention is increased from 12089Hz to 14289Hz in the traditional design, and the resonance frequency is increased by 2200Hz and 18%. For the resonant frequency of the short side of the voice coil 1, the resonant frequency of the embodiment of the invention is increased from 19650Hz to 22348Hz, which is the traditional design, and the resonant frequency is increased by 2698Hz and 13.7%. Therefore, the resonant frequency of the vibration system is effectively improved by the embodiment of the invention.

The embodiment of the invention discloses a sound production device. The sound generating device comprises a magnetic circuit system, a vibration system and a supporting system for connecting the magnetic circuit system and the vibration system. Wherein, the vibration system includes: the voice coil 1, the diaphragm 2, the resonance ring 3, the adhesive layer 11, and the middle plate 4. The resonance ring 3 is connected between the voice coil 1 and the vibration plate 2, and the resonance ring 3 has higher rigidity, so that the rigidity of the whole vibration system is improved after the resonance ring 3 is added, the resonance frequency is improved, the initial frequency of acoustic attenuation in an acoustic response curve is increased, the occurrence frequency of a sharp peak of a single acoustic response curve is increased and exceeds the audible range of human ears, and the effects of extending high-frequency sensitivity and improving the use experience of a user are achieved. And the voice coil 1 can be designed according to the shape and weight of the resonance ring 3, so that the voice coil 1 is ensured not to collide with the lower pole piece 9 during electrification vibration.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The sound production device is characterized by comprising a magnetic circuit system, a vibration system and a supporting system for connecting the magnetic circuit system and the vibration system; wherein the vibration system comprises:

a voice coil (1);

a diaphragm (2) positioned above the voice coil (1), the diaphragm (2) vibrating following the voice coil (1);

a resonance ring (3) connected between the voice coil (1) and the diaphragm (2);

and the middle pasting plate (4) is connected above the vibration plate (2).

2. A sound-generating device as claimed in claim 1, characterised in that said resonance ring (3) comprises a plurality of resonance plates distributed in a ring shape.

3. The sound emitting device according to claim 1 or 2, characterized in that the rigidity of the vibration plate (2) and the rigidity of the voice coil (1) are both smaller than the rigidity of the resonance ring (3).

4. A sound-generating device as claimed in claim 3, characterised in that the resonance ring (3) is of an alloy material.

5. The sound generating device according to claim 1, wherein the vibration plate (2) comprises a folded ring, the resonance ring (3) is connected to the inner side of the folded ring, and the width of the resonance ring (3) is greater than or equal to the width of the voice coil (1).

6. The sound generating device according to claim 1, wherein the magnetic circuit system comprises a main magnet (5) and a plurality of secondary magnets (6), the plurality of secondary magnets (6) are annularly distributed on the outer side of the main magnet (5), a magnetic gap region is formed between the plurality of secondary magnets (6) and the main magnet (5), and the voice coil (1) extends into the magnetic gap region.

7. The sound generating device according to claim 6, wherein said magnetic circuit system further comprises a main pole piece (7) on said main magnet (5), a plurality of auxiliary pole pieces (8) on each of said auxiliary magnets (6), and a lower pole piece (9) on the lower side of said main magnet (5) and said auxiliary magnets (6);

the lower pole piece (9) is used for sealing magnetic lines generated by the main magnet (5) and the plurality of auxiliary magnets (6), and the plurality of auxiliary pole pieces (8) and the main pole piece (7) are used for conducting magnetism so as to concentrate magnetic fields of the main magnet (5) and the plurality of auxiliary magnets (6) into gaps between the main magnet (5) and the plurality of auxiliary magnets (6).

8. The sound generating device according to claim 7, wherein the supporting system comprises a supporting frame (10), the supporting frame (10) comprises a receiving cavity for receiving the magnetic circuit system and the vibration system, a connecting boss is circumferentially arranged at the top of the receiving cavity, and the vibration plate (2) is connected to the connecting boss.