CN117278916A - Sound production device and audio equipment - Google Patents

Abstract

The invention discloses a sound generating device and audio equipment, wherein the sound generating device comprises a mounting base, a magnetic circuit system, a first vibrating diaphragm and a second vibrating diaphragm, the magnetic circuit system comprises a first magnetic circuit system and a second magnetic circuit system, a first magnetic gap is formed on the first magnetic circuit system, a second magnetic gap is formed on the second magnetic circuit system, the second magnetic gap is annularly arranged outside the first magnetic gap, the first vibrating diaphragm is arranged corresponding to the first magnetic gap, the second vibrating diaphragm is arranged corresponding to the second magnetic gap, the vibration frequency of the second vibrating diaphragm is lower than that of the first vibrating diaphragm, the second vibrating diaphragm is arranged on one side of the first vibrating diaphragm, close to the mounting base, the second vibrating diaphragm is arranged in a cylinder shape which expands gradually in the direction close to the mounting base, projections of the first vibrating diaphragm and the second vibrating diaphragm on the mounting base are respectively a first projection and a second projection, and the first projection is arranged on the inner ring side of the second projection. The technical scheme of the invention aims to reduce the interference among different diaphragms so as to ensure the sounding performance of the sounding device.

Description

Sound production device and audio equipment

Technical Field

The invention relates to the field of sound production equipment, in particular to a sound production device and audio equipment.

Background

The sound generating device is an important acoustic component in audio equipment, is a transducer for converting an electric signal into an acoustic signal, and comprises an earphone, a sound box, a mobile phone or a computer. Nowadays, the market increasingly pursues full-band tone quality, in order to meet the full-band tone quality, a plurality of multi-unit sound generating devices are emerging, namely, one sound generating device is internally provided with a plurality of sound generating units with different sound generating frequency bands, wherein a high-pitch sound generating unit is generally positioned in the middle and is easily interfered by other sound generating units at the periphery, so that distortion is caused, and the sound generating performance of the sound generating device is affected.

Disclosure of Invention

The invention mainly aims to provide a sound generating device, which aims to reduce interference among different diaphragms so as to ensure sound generating performance of the sound generating device.

In order to achieve the above object, the sound generating apparatus according to the present invention includes:

a mounting base;

the magnetic circuit system is arranged on the mounting base and comprises a first magnetic circuit system and a second magnetic circuit system, wherein a first magnetic gap is formed in the first magnetic circuit system, a second magnetic gap is formed in the second magnetic circuit system, and the second magnetic gap is annularly arranged outside the first magnetic gap; and

the first vibrating diaphragm is arranged corresponding to the first magnetic gap; and

the second vibrating diaphragm is arranged corresponding to the second magnetic gap, and the vibration frequency of the second vibrating diaphragm is lower than that of the first vibrating diaphragm;

the second vibrating diaphragm is located one side of the first vibrating diaphragm, which is close to the mounting base, the second vibrating diaphragm is arranged in a cylinder shape which is gradually expanded in the direction, which is close to the mounting base, and the projections of the first vibrating diaphragm and the second vibrating diaphragm on the mounting base are respectively a first projection and a second projection, and the first projection is located on the inner ring side of the second projection.

Optionally, the first vibrating diaphragm is spherical, and the first vibrating diaphragm is convexly arranged towards the direction deviating from the mounting base.

Optionally, the sound generating device further includes a flexible member, the flexible member includes a first flexible member, and the periphery of the first diaphragm is connected to the narrow opening of the second diaphragm through the first flexible member.

Optionally, the flexible component further comprises a second flexible component, and the mounting base is connected to the wide opening of the second diaphragm through the second flexible component.

Optionally, the first magnetic circuit is at least partially higher than the first magnetic circuit, the first flexible piece is connected to the outer magnet of the first magnetic circuit, and the mounting base is provided with a pressure relief hole.

Optionally, the first magnetic circuit system is stacked on one side of the second magnetic circuit system, which is away from the mounting base.

Optionally, the first flexible piece is connected to the outer magnet of the first magnetic circuit system through a supporting pad, and the supporting pad is made of a hard material.

Optionally, the flexible member includes a third flexible member, the second diaphragms are sequentially provided with a plurality of second magnetic circuit systems at intervals, the second magnetic circuit systems are correspondingly provided with a plurality of second magnetic circuit systems, and a wide opening of one second diaphragm is connected with a narrow opening of the other diaphragm through the third flexible member between two adjacent second diaphragms;

among the plurality of second diaphragms, the second diaphragm closer to the mounting base has a lower vibration frequency.

Optionally, the flexible member is provided in a cylindrical shape that diverges in a direction approaching the mounting base.

The invention also provides audio equipment comprising the sounding device.

In the technical scheme of the invention, the arrangement position of the first vibrating diaphragm avoids the sound wave radiation area of the second vibrating diaphragm, and the second vibrating diaphragm is also outside the sound wave radiation area of the first vibrating diaphragm, so that the vibration of the first vibrating diaphragm and the vibration of the second vibrating diaphragm are not mutually interfered, and the sound production performance of the sound production device in different frequency bands can be guaranteed. Secondly, the second vibrating diaphragm is the conical surface structure, more be favorable to designing sound generating mechanism and reach 360 degrees directional reflection cones, in addition, compare the plane vibrating diaphragm, the second vibrating diaphragm is difficult to horizontal vibration, consequently, the avris of second vibrating diaphragm need not set up the hem, when the second vibrating diaphragm as well high pitch vibrating diaphragm, because the wavelength of well high pitch is short, the roughness requirement to sound generating mechanism's surface is higher, the second vibrating diaphragm does not set up the hem, can reduce the influence of the height of hem to the planarization, be favorable to avoiding the sound wave reflection to cause the peak valley in the frequency response curve, thereby can promote the frequency response curve's of first vibrating diaphragm flatness. Simultaneously, the coaxial setting of first vibrating diaphragm and second vibrating diaphragm forms some sound sources for sound output of sound generating mechanism is more natural, is favorable to promoting user's hearing experience.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an embodiment of a sound generating device according to the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Mounting base	311	First voice coil
110	Pressure relief hole	320	Second vibrating diaphragm
				210	First magnetic circuit system	321	Second voice coil
211	First magnetic gap	410	First flexible piece
				220	Second magnetic circuit system	420	Second flexible piece
221	Second magnetic gap	500	Support gasket
				310	First vibrating diaphragm

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined 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 the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a sound generating device.

In one embodiment of the present invention, as shown in fig. 1, the sound generating apparatus includes:

a mounting base 100;

the magnetic circuit system is arranged on the mounting base 100 and comprises a first magnetic circuit system 210 and a second magnetic circuit system 220, wherein a first magnetic gap 211 is formed in the first magnetic circuit system 210, a second magnetic gap 221 is formed in the second magnetic circuit system 220, and the second magnetic gap is arranged outside the first magnetic gap 211 in a surrounding mode; and

a first diaphragm 310 disposed corresponding to the first magnetic gap 211; and

a second diaphragm 320 disposed corresponding to the second magnetic gap 221, where a vibration frequency of the second diaphragm 320 is lower than that of the first diaphragm 310;

the second diaphragm 320 is located at a side of the first diaphragm 310 near the mounting base 100, the second diaphragm 320 is configured as a cylinder shape that diverges in a direction near the mounting base 100, projections of the first diaphragm 310 and the second diaphragm 320 on the mounting base 100 are respectively a first projection and a second projection, and the first projection is located at an inner ring side of the second projection.

Wherein, the first diaphragm 310 and the second diaphragm 320 may be set as a high-pitched diaphragm, a middle-pitched diaphragm or a low-pitched diaphragm, and it should be noted that the vibration frequency of the first diaphragm 310 is greater than that of the second diaphragm 320 at the side, so as to ensure the sound production performance of the sound production device. The first diaphragm 310 is connected with a first voice coil 311, the first voice coil 311 is correspondingly inserted in the first magnetic gap 211, the first diaphragm 310 is driven to vibrate by the movement of the first voice coil 311, similarly, the second diaphragm 320 is connected with a second voice coil 321, the second voice coil 321 is correspondingly inserted in the second magnetic gap 221, and the second diaphragm 320 is driven to vibrate by the movement of the second voice coil 321.

In the technical scheme of the invention, the arrangement position of the first diaphragm 310 avoids the sound wave radiation area of the second diaphragm 320, and the second diaphragm 320 is also outside the sound wave radiation area of the first diaphragm 310, so that the vibration of the first diaphragm 310 and the vibration of the second diaphragm 320 are not interfered with each other, thereby being beneficial to guaranteeing the sound production performance of the sound production device in different frequency bands. Secondly, second vibrating diaphragm 320 is the conical surface structure, more be favorable to designing sound generating mechanism and reach 360 degrees directional reflection cones, in addition, compare the plane vibrating diaphragm, second vibrating diaphragm 320 is difficult to horizontal vibration, consequently, the avris of second vibrating diaphragm 320 need not set up the hem, when second vibrating diaphragm 320 is as well high pitch vibrating diaphragm, because the wavelength of well high pitch is short, the roughness requirement to sound generating mechanism's surface is higher, second vibrating diaphragm 320 does not set up the hem, can reduce the influence of the height of hem to the planarization, be favorable to avoiding the sound wave reflection to cause peak valley in the frequency response curve, thereby can promote the planarization of the frequency response curve of first vibrating diaphragm 310. Meanwhile, the first diaphragm 310 and the second diaphragm 320 are coaxially arranged to form a point sound source, so that the sound output of the sound generating device is more natural, and the hearing experience of a user is improved.

Further, in this embodiment, the first diaphragm 310 is spherical, and the first diaphragm 310 protrudes in a direction away from the mounting base 100. Similarly, the spherical first diaphragm 310 is not easily vibrated laterally, and therefore, the side of the second diaphragm 320 does not need to be folded. When the second vibrating diaphragm 320 is used as a middle-high sound vibrating diaphragm, the second vibrating diaphragm 320 is not provided with a folded edge, so that the influence of the height of the folded edge on the flatness can be reduced, the peak valley in the frequency response curve caused by sound wave reflection can be avoided, and the flatness of the frequency response curve of the second vibrating diaphragm 320 can be improved. Of course, in other embodiments, the first diaphragm 310 may be configured to be planar or tapered as the second diaphragm 320.

Further, in this embodiment, the sound generating device further includes a flexible member, the flexible member includes a first flexible member 410, and the outer periphery of the first diaphragm 310 is connected to the narrow opening of the second diaphragm 320 through the first flexible member 410. Wherein, the material of flexible piece can be foam material, silica gel material or rubber material, and the affliction can be connected through gluing or fusion welding's mode. In this way, the acoustic performance of the first diaphragm 310 and the second diaphragm 320 are skillfully connected, and the first flexible member 410 can absorb the vibration energy of the first diaphragm 310 and the second diaphragm 320, so that the vibration of the first diaphragm 310 and the second diaphragm 320 is ensured not to disturb each other, a high-quality frequency response curve can be achieved, no distortion is increased, and medium and high tones are enabled to be all the more, so that the sounding performance of the sounding device is improved to the maximum extent. Without loss of generality, the first flexible member 410 is configured as a tube shape that diverges in a direction approaching the mounting base 100, that is, a shape of a conical surface identical to that of the second diaphragm 320, and the first flexible member 410 is smoothly connected with the first diaphragm 310 at the narrow opening and is smoothly connected with the second diaphragm 320 at the wide opening, so that the outer surface of the sound generating device on the sound generating side is formed into a shape of a conical surface, thereby improving the flatness of the outer surface of the sound generating device on the sound generating side. Thus, when the sound generating device is set as a middle-high pitch device, specifically, the first diaphragm 310 is set as a high pitch diaphragm, and the second diaphragm 320 is set as a middle pitch diaphragm, the flatness of the frequency response curve of the sound generating device can be ensured, so that the sound generating performance of the sound generating device is ensured. Of course, in other embodiments, the sides of the first diaphragm 310 and the second diaphragm 320 may be connected to the magnet of the magnetic circuit system, or the shell structure of the sound generating device, and the first flexible member 410 may also be provided with an annular planar structure.

Further, in this embodiment, the flexible member further includes a second flexible member 420, and the mounting base 100 is connected to the wide opening of the second diaphragm 320 through the second flexible member 420. Therefore, the side of the second vibrating diaphragm 320 is connected with the flexible structure, which is favorable for guaranteeing the frequency response performance of the second vibrating diaphragm 320, thereby guaranteeing the sounding performance of the sounding device. Likewise, the second flexible member 420 is disposed in a cylindrical shape gradually expanding in a direction close to the mounting base 100, that is, in the same conical shape as the second diaphragm 320, and the narrow opening end of the second flexible member 420 is smoothly connected with the wide opening end of the second diaphragm 320, so as to further improve the flatness of the outer surface of the sound generating device, thereby guaranteeing the middle-high pitch performance of the sound generating device. Of course, in other embodiments, the mounting base 100 may be directly connected to the second diaphragm 320.

Further, in this embodiment, the first magnetic circuit 210 is at least partially higher than the first magnetic circuit 210, the first flexible member 410 is connected to the outer magnet of the first magnetic circuit 210, and the mounting base 100 is provided with a pressure relief hole 110. So, through the outer magnet connection of first flexible piece 410 and first magnetic circuit 210, separate the back acoustic cavity of first vibrating diaphragm 310 and the back acoustic cavity of second vibrating diaphragm 320, simultaneously, the pressure release hole 110 that sets up on the mounting substrate is connected in the back acoustic cavity of second vibrating diaphragm 320 for the preceding acoustic cavity of second vibrating diaphragm 320 and back acoustic cavity can pressure balance, the effectual FO that reduces sound production device makes sound production device's qts lower, in order to ensure sound production device's sound production effect. Specifically, the pressure relief holes 110 are provided in plurality and distributed at intervals around the outer periphery of the second magnetic circuit 220. Of course, in other embodiments, the inner magnet of the second magnetic circuit 220 may be raised, and the first flexible member 410 may be connected to the inner magnet of the second magnetic circuit 220.

Further, in the present embodiment, the first magnetic circuit system 210 is stacked on a side of the second magnetic circuit system 220 facing away from the mounting base 100. In this way, the space layout inside the sound generating device can be facilitated, the miniaturization of the sound generating device can be facilitated, and the equipment of the first magnetic circuit system 210 and the second magnetic circuit system 220 can be facilitated. Of course, in other embodiments, the second magnetic circuit 220 may be disposed outside the first magnetic circuit 210, for example, the inner magnet of the second magnetic circuit 220 may be disposed outside the outer magnet of the first magnetic circuit 210, or the outer magnet of the first magnetic circuit 210 may be used as the inner magnet of the second magnetic circuit 220, and the magnetic poles of the inner and outer magnets of the magnets are opposite.

Further, in this embodiment, the first flexible element 410 is connected to the external magnet of the first magnetic circuit system 210 through a supporting spacer 500, and the supporting spacer 500 is made of a hard material. It will be appreciated that the support spacer 500 is provided in a ring shape to separate the rear acoustic cavity of the first diaphragm 310 from the rear acoustic cavity of the second diaphragm 320. The support spacer 500 is sandwiched between the first flexible element 410 and the outer magnet of the first magnetic circuit 210, and indirectly supports the first diaphragm 310 and the second diaphragm 320 by providing a supporting effect for the first flexible element 410, and the first flexible element 410 can be connected with the support spacer 500 at a local position, so that the general structure can be suspended to ensure that the first flexible element 410 absorbs vibration energy. Of course, in other embodiments, the first flexible element 410 may be directly connected to the magnet at a local position, and the adjacent structure may avoid the first flexible element 410, so as to ensure that the first flexible element 410 is suspended properly.

Further, in this embodiment, the flexible member includes a third flexible member, the second diaphragms 320 are sequentially provided with a plurality of second magnetic circuit systems 220 at intervals, a plurality of second magnetic circuit systems are correspondingly provided, between two adjacent second diaphragms 320, a wide opening of one second diaphragm 320 is connected to a narrow opening of another diaphragm through the third flexible member, and among the plurality of second diaphragms 320, a vibration frequency of the second diaphragm 320 that is closer to the mounting base 100 is lower. It can be understood that a second diaphragm 320 is disposed corresponding to the second magnetic gap 221 of a second magnetic circuit system 220, and the vibration frequency of each vibration decreases from the center to the outside in sequence, so that a multi-unit coaxial sound generating device can be formed, which is beneficial to realizing full-frequency playing, and the sound level is more distinct and the detail sense is more outstanding. Without loss of generality, the third flexible member is provided in a cylindrical shape that diverges in a direction approaching the mounting base 100, and is also connected to the magnet through a support spacer 500 to function as a support for the second diaphragm 320.

The invention also provides audio equipment, which comprises a sound generating device, wherein the specific structure of the sound generating device refers to the embodiment, and because the audio equipment adopts all the technical schemes of all the embodiments, the audio equipment at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted. The audio equipment can be a sound, an earphone, a mobile phone or a computer, etc.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. A sound emitting device, comprising:

a mounting base;

the magnetic circuit system is arranged on the mounting base and comprises a first magnetic circuit system and a second magnetic circuit system, wherein a first magnetic gap is formed in the first magnetic circuit system, a second magnetic gap is formed in the second magnetic circuit system, and the second magnetic gap is annularly arranged outside the first magnetic gap; and

the first vibrating diaphragm is arranged corresponding to the first magnetic gap; and

the second vibrating diaphragm is arranged corresponding to the second magnetic gap, and the vibration frequency of the second vibrating diaphragm is lower than that of the first vibrating diaphragm;

the second vibrating diaphragm is located one side of the first vibrating diaphragm, which is close to the mounting base, the second vibrating diaphragm is arranged in a cylinder shape which is gradually expanded in the direction, which is close to the mounting base, and the projections of the first vibrating diaphragm and the second vibrating diaphragm on the mounting base are respectively a first projection and a second projection, and the first projection is located on the inner ring side of the second projection.

2. The sound generating apparatus of claim 1, wherein the first diaphragm is spherical, and the first diaphragm protrudes in a direction away from the mounting base;

and/or the sounding side surface of the sounding device is in a conical surface shape.

3. The sound generating apparatus of claim 1, further comprising a flexible member, the flexible member comprising a first flexible member, the outer periphery of the first diaphragm being coupled to the narrow opening of the second diaphragm by the first flexible member.

4. The sound-producing device as recited in claim 3, wherein the flexible member further comprises a second flexible member, the mounting base being coupled to the wide mouth of the second diaphragm via the second flexible member.

5. The sound generating apparatus of claim 4, wherein the first magnetic circuit is at least partially higher than the first magnetic circuit, the first flexible member is connected to an outer magnet of the first magnetic circuit, and the mounting base is provided with a pressure relief hole.

6. The sound generating apparatus of claim 5, wherein the first magnetic circuit is stacked on a side of the second magnetic circuit facing away from the mounting base.

7. The sound generating apparatus of claim 5, wherein the first flexible member is connected to the outer magnet of the first magnetic circuit system through a supporting spacer, and the supporting spacer is made of a hard material.

8. The sound generating apparatus as claimed in claim 3, wherein the flexible member includes a third flexible member, the second diaphragm is sequentially provided with a plurality of second magnetic circuit systems at intervals, and the second magnetic circuit systems are correspondingly provided with a plurality of second magnetic circuit systems;

between two adjacent second diaphragms, the wide opening of one second diaphragm is connected with the narrow opening of the other diaphragm through the third flexible piece;

among the plurality of second diaphragms, the second diaphragm closer to the mounting base has a lower vibration frequency.

9. The sound generating apparatus according to any one of claims 3 to 8, wherein the flexible member is provided in a cylindrical shape that diverges in a direction approaching the mounting base.

10. An audio device comprising the sound emitting apparatus of any one of claims 1 to 9.