CN115955634A

CN115955634A - Electroacoustic driving device and loudspeaker equipment

Info

Publication number: CN115955634A
Application number: CN202211730569.4A
Authority: CN
Inventors: 赵福彬; 袁志芳
Original assignee: Tonly Electronics Holdings Ltd
Current assignee: Tonly Electronics Holdings Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-11

Abstract

The invention discloses an electroacoustic driving device and a loudspeaker device, relating to the technical field of electroacoustic devices, wherein the electroacoustic driving device comprises: the first voice coil is fixed on the medium surface; the elastic component is connected to the medium surface; the first magnetic driving component is connected to the elastic component; the first magnetic driving assembly is provided with a first magnetic field, and the first magnetic field covers the first voice coil; the first voice coil generates a second magnetic field after being electrified, the first magnetic driving assembly generates vibration under the interaction force between the second magnetic field and the first magnetic field, and the elastic assembly drives the medium surface to vibrate to produce sound. The electroacoustic driving device disclosed by the invention can solve the technical problems that the sounding function of the existing loudspeaker is limited by factors such as the size of a sound basin, the installation requirement and the like, and the defects of small sounding area and poor applicability exist.

Description

Electroacoustic driving device and loudspeaker equipment

Technical Field

The invention belongs to the technical field of electroacoustic equipment, and particularly relates to an electroacoustic driving device and loudspeaker equipment.

Background

The loudspeaker is a transducer for converting an electric signal into a sound signal, and the principle of the loudspeaker is that the continuously-changed electric signal is output to an electroacoustic driving device so as to drive a sound cone connected to the electroacoustic driving device to vibrate according to preset amplitude and frequency through the magnetic effect of current, thereby achieving the sound production effect.

However, since the sound-generating operation needs to be performed by the aid of the sound cone, that is, the sound-generating function of the speaker is limited by the size of the sound cone, the installation requirement and other factors, the sound-generating device has the defects of small sound-generating area and poor applicability.

Disclosure of Invention

The invention aims to provide an electroacoustic driving device, and aims to solve the technical problems that the sounding function of the existing loudspeaker is limited by factors such as the size of a sound basin, the installation requirement and the like, the sounding area is small, and the applicability is poor.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

an electro-acoustic driver apparatus, comprising:

the first voice coil is fixed on the medium surface;

the elastic component is connected to the medium surface;

the first magnetic driving component is connected to the elastic component; the first magnetic drive assembly has a first magnetic field that overlays the first voice coil;

the first voice coil generates a second magnetic field after being electrified, the first magnetic driving assembly generates vibration under the interaction force between the second magnetic field and the first magnetic field, and the elastic assembly drives the medium surface to vibrate to produce sound.

Further, the elastic component comprises a first centering branch sheet and a second centering branch sheet; wherein:

the outer edge part of the first centering branch sheet is connected to the medium surface, and the inner edge part of the first centering branch sheet is connected with the outer side part of the first magnetic driving assembly; the outer edge part of the second centering branch sheet is connected with the inner side part of the first magnetic driving assembly, and the inner edge part of the second centering branch sheet is connected to the medium surface;

the first magnetic drive assembly is spaced from the media surface.

Further, the first magnetic driving component comprises a ring-shaped magnet and a magnetic conductive seat; wherein:

the magnetic conductive seat is provided with an annular seat body part and an annular bulge part, the annular bulge part is convexly arranged on the first end surface of the annular seat body part, the first end surface of the annular magnet is connected to the first end surface of the annular seat body part, and the first voice coil is positioned between the outer annular surface of the annular magnet and the inner annular surface of the annular bulge part;

the annular bulge is connected with the inner edge part of the first centering branch piece, and the annular magnet is connected with the outer edge part of the second centering branch piece.

Further, the first magnetic drive assembly further comprises a first magnetically conductive ring; wherein:

the first end face of the first magnetic conductive ring is connected to the second end face of the annular magnet, a magnetic circuit gap is formed between the outer ring face of the first magnetic conductive ring and the inner ring face of the annular bulge, and the first voice coil is located in the magnetic circuit gap.

Further, the first magnetic drive assembly further comprises a second magnetically conductive ring; wherein:

the first end face of the second magnetic conductive ring is connected to the first end face of the annular seat body, the first end face of the annular magnet is connected to the second end face of the second magnetic conductive ring, a magnetic circuit gap is formed between the outer ring face of the second magnetic conductive ring and the inner ring face of the annular protruding portion, and the first voice coil is located in the magnetic circuit gap.

Further, the electroacoustic driving device further comprises a connecting flange; one side end face of the connecting flange is connected to the medium face, and the other side end face of the connecting flange is connected with the outer edge portion of the first centering branch piece.

Correspondingly, the invention also provides a loudspeaking device, which comprises a fixing plate and the electroacoustic driving device; the fixing plate is provided with a medium surface, the first voice coil is fixed on the medium surface, and the elastic assembly is connected to the medium surface.

Furthermore, the fixed plate is a mural panel, the mural panel is provided with a first side surface and a second side surface which are opposite, a mural body is inlaid in the first side surface, and the second side surface is the medium surface.

Furthermore, the loudspeaking device also comprises a shell, wherein a containing cavity is formed in the shell; the fixing plate is arranged to cover the containing concave cavity, so that the containing concave cavity forms a closed cavity; the first voice coil, the elastic component and the first magnetic driving component are positioned in the closed cavity.

Further, the loudspeaker device further comprises a diaphragm, a second voice coil and a second magnetic driving component; wherein:

the shell is provided with a connecting through hole which is communicated with the accommodating concave cavity; the vibrating diaphragm covers the connecting through hole; the second voice coil is positioned in the containing cavity and connected to the vibrating diaphragm; the second magnetic driving assembly is fixed in the accommodating concave cavity and provided with a third magnetic field, and the third magnetic field covers the second voice coil;

the second voice coil generates a fourth magnetic field after being electrified, and the second voice coil generates vibration under the interaction force between the fourth magnetic field and the third magnetic field and drives the vibrating diaphragm to vibrate and generate sound.

Compared with the prior art, the invention has the beneficial effects that:

according to the electroacoustic driving device, the loudspeaker equipment can take any medium surface of any hard object as a sound production main body, so that normal sound production is realized without the help of the cone, and the sound production function of the loudspeaker equipment cannot be limited by the size and the installation requirement of the cone, so that the applicability of the loudspeaker equipment is remarkably improved; the sounding mode also breaks through the limitation of the sound cone on the sound direction, and the sound can be spread outwards at a large angle through a medium with a large area and a wide coverage range, so that the sounding area is increased, the width of a sound field is improved, a balanced sound field in a larger space is obtained, the performance of the sound in a low-frequency area is improved, and a better hearing effect can be provided for a user; in addition, the improvement of the sound production area and the sound field width is equivalent to the increase of the number of the traditional loudspeakers, so that the material cost is indirectly reduced, the material cost and the processing cost are also reduced by omitting a sound cone and a sound cone matching part, and the overall cost of a loudspeaker device product is greatly saved.

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 cross-sectional view of an electro-acoustic driving apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of an electro-acoustic driver according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of an embodiment of the speaker apparatus of the present invention;

fig. 4 is a schematic view of an assembly structure of an embodiment of the speaker device of the present invention;

fig. 5 is a schematic cross-sectional view of another embodiment of the speaker device of the present invention;

fig. 6 is an exploded schematic view of another embodiment of the speaker device of the present invention.

The reference numbers indicate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Electroacoustic driving device	22	Connecting flange
2	Fixing plate	41	Accommodation cavity
				3	Wall painting panel	42	Connecting through hole
4	Outer casing	121	First centering support
				5	Vibrating diaphragm	122	Second centering support plate
6	Second voice coil	131	Ring magnet
				7	Second magnetic drive assembly	132	Magnetic conduction seat
11	First voice coil	133	First magnetic conductive ring
				12	Elastic component	134	Second magnetic conductive ring
13	First magnetic drive assembly	1321	Annular seat body part
				21	Dielectric surface	1322	Annular boss

The implementation, functional features and advantages of the present invention will be further described 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 obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "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 relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, if the expression "and/or" and/or "is used throughout, the meaning includes three parallel schemes, for example," A and/or B ", including scheme A, or scheme B, or a scheme satisfying both schemes A and B. 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.

Referring to fig. 1 and 2, an embodiment of the present invention provides an electro-acoustic driving apparatus 1, where the electro-acoustic driving apparatus 1 includes:

a first voice coil 11 fixed to the medium surface 21;

an elastic member 12 connected to the medium surface 21;

the first magnetic driving component 13 is connected to the elastic component 12; the first magnetic drive assembly 13 has a first magnetic field that covers the first voice coil 11;

the first voice coil 11 generates a second magnetic field after being energized, and the first magnetic driving assembly 13 generates vibration under the interaction force between the second magnetic field and the first magnetic field, and drives the medium surface 21 to vibrate through the elastic assembly 12 to generate sound.

In this embodiment, the main structure of the first voice coil 11 is a cylindrical skeleton, and a coil winding is wound on the surface of the cylindrical skeleton; based on the magnetic effect of the current, the coil winding can generate a second magnetic field after being electrified; wherein, the cylindrical skeleton of voice coil can select polyimide material for use. The first magnetic drive assembly 13 may comprise a magnetic member for generating the second magnetic field, which may particularly be a kind of permanent magnet, such that the second magnetic field is a constant magnetic field, and corresponding devices for performing the functions of magnetic field enclosure, magnetic field concentration, magnetic circuit guidance, etc. The elastic member 12 includes any device having a certain elastic deformation capability and capable of transmitting vibration energy, such as a spring, a centering support, and the like, and is not limited herein. The dielectric surface 21 may be the surface of any hard object, such as a wooden table top, a mural panel 3, a glass cover plate, a metal piece, a box body, a wall, etc.

In the specific implementation process, after the coil winding of the first voice coil 11 is fed with the alternating current, a second magnetic field is generated, and the direction and the magnetic field strength of the second magnetic field are changed along with the change of the parameters of the phase, the amplitude, the frequency and the like of the alternating current; in the case that the first magnetic field generated by the first magnetic driving assembly 13 is a constant magnetic field, the change of the direction and the magnetic field strength of the second magnetic field will cause an attractive or repulsive force between the second magnetic field and the first magnetic field, under which a relative motion will occur between the first voice coil 11 and the first magnetic driving assembly 13; when the mutually attracting and repelling acting forces are switched alternately and rapidly, the first voice coil 11 is fixed on the medium surface 21, so that the relative motion between the first voice coil 11 and the first magnetic driving assembly 13 is represented as the vibration of the first magnetic driving assembly 13 relative to the first voice coil 11, and the vibration energy of the first magnetic driving assembly 13 is transmitted to the medium surface 21 through the elastic assembly 12, so as to drive the hard object where the medium surface 21 is located to vibrate, and further emit the sound with preset loudness and frequency.

Based on the above arrangement, the loudspeaker device can use any medium surface 21 of any hard object as a sound-producing main body, so that normal sound production is realized without the help of a cone, and thus the sound-producing function of the loudspeaker device is not limited by the size and installation requirements of the cone, and the applicability of the loudspeaker device is remarkably improved; the sounding mode also breaks through the limitation of the sound cone in the sound direction, and the sound can be spread outwards at a large angle through the medium surface 21 with a large area and a wide coverage range, so that the sounding area is increased, the width of a sound field is increased, a balanced sound field with a larger space is obtained, the performance of the sound in a low-frequency area is improved, and a better auditory effect can be provided for a user; in addition, the improvement of the sound production area and the sound field width is equivalent to the increase of the number of the traditional loudspeakers, so that the material cost is indirectly reduced, the material cost and the processing cost are also reduced by omitting a sound cone and a sound cone matching part, and the overall cost of a loudspeaker device product is greatly saved.

Alternatively, with reference to fig. 1 and 2, the elastic assembly 12 comprises a first stiffener 121 and a second stiffener 122; wherein:

the outer edge of the first centering leg 121 is connected to the medium surface 21, and the inner edge of the first centering leg 121 is connected to the outer side of the first magnetic drive unit 13; the outer edge of the second centering branch piece 122 is connected with the inner side of the first magnetic driving assembly 13, and the inner edge of the second centering branch piece 122 is connected with the medium surface 21;

the first magnetic drive assembly 13 is spaced from the media side 21.

The first and

second centroiding pieces

121 and 122 are shown as ring-shaped structures with corrugated features, and have certain elastic deformation capability in the axial direction. After the first centering branch piece 121, the second centering branch piece 122 and the first magnetic driving component 13 are connected as above, the first magnetic driving component 13 can be suspended on the medium surface 21; under the limiting action of the first centering branch piece 121 and the second centering branch piece 122, the first magnetic driving assembly 13 can be ensured to stably vibrate along the axial direction without deviation when receiving the interaction force between the second magnetic field and the first magnetic field, so that the accuracy, the stability and the controllability of the vibration parameters of the first magnetic driving assembly 13 are improved; the vibration energy of the first magnetic driving assembly 13 is transmitted to the medium surface 21 through the first centering branch piece 121 and the second centering branch piece 122, so as to drive the hard object where the medium surface 21 is located to vibrate, and further emit sound with preset loudness and frequency.

Alternatively, referring to fig. 1 and 2, the electro-acoustic driving device further comprises a connecting flange 22; one end surface of the connecting flange 22 is connected to the medium surface 21, and the other end surface of the connecting flange 22 is connected to the outer edge of the first centering leg 121; specifically, the lower end face of the connecting flange 22 may be provided with an annular groove or an annular flange, the medium surface 21 may be correspondingly provided with an annular flange or an annular groove, and the connecting flange 22 may be conveniently positioned at a preset position on the medium surface 21 by the snap-fit of the annular groove and the annular flange; the outer edge of the first stiffener 121 may be fixed to the upper end surface of the connection flange 22 by bonding or the like. Through the switching function of the connecting flange 22, it is more convenient to form a spacing distance between the first magnetic driving assembly 13 and the medium surface 21, and it is also more convenient to realize the assembly and disassembly between the electroacoustic driving device and the medium surface 21.

Alternatively, referring to fig. 1 and 2, first magnetic drive assembly 13 comprises a ring magnet 131 and a magnetic conductive seat 132;

the magnetic conductive seat 132 has an annular seat portion 1321 and an annular projection 1322, the annular projection 1322 is convexly disposed on a first end surface of the annular seat portion 1321, the first end surface of the annular magnet 131 is connected to the first end surface of the annular seat portion 1321, and the first voice coil 11 is located between an outer annular surface of the annular magnet 131 and an inner annular surface of the annular projection 1322; the annular projection 1322 is connected to an inner edge of the first damper 121, and the annular magnet 131 is connected to an outer edge of the second damper 122.

The ring magnet 131 may be a permanent magnet. Illustratively, the first voice coil 11 and the annular magnet 131 are enclosed by the annular protruding portion 1322, and the annular protruding portion 1322 and the annular seat portion 1321 jointly form an enclosure structure capable of forming a magnetic field shielding effect on the first magnetic field generated by the annular magnet 131 and the second magnetic field generated by the first voice coil 11, so that the first magnetic field and the second magnetic field can be gathered in a narrow area where the first voice coil 11 and the annular magnet 131 are located, thereby improving the magnetic field strength and uniformity, ensuring that the first magnetic field and the second magnetic field can stably interact with each other, and further enabling the speaker device to obtain higher sensitivity and lower sound distortion.

Optionally, referring to fig. 1 and 2, the first magnetic drive assembly 13 further comprises a first magnetically permeable ring 133; wherein:

the first end surface of the first magnetic conductive ring 133 is connected to the second end surface of the annular magnet 131, a magnetic path gap is formed between the outer annular surface of the first magnetic conductive ring 133 and the inner annular surface of the annular projection 1322, and the first voice coil 11 is located in the magnetic path gap.

Illustratively, based on the magnetic path gap formed between the outer annular surface of the first magnetic conductive ring 133 and the inner annular surface of the annular projection 1322, the first magnetic field generated by the annular magnet 131 and the second magnetic field generated by the first voice coil 11 can be further confined in the magnetic path gap to perform a magnetic conductive function, so that the strength and uniformity of the magnetic field in the narrow magnetic path gap can be further improved, and the stable interaction between the first magnetic field and the second magnetic field can be ensured, thereby further improving the sensitivity of the speaker device and further reducing the distortion of the vibration sound.

Optionally, referring to fig. 1 and 2, the first magnetic drive assembly 13 further comprises a second magnetically permeable ring 134; wherein:

the first end surface of the second magnetic conductive ring 134 is connected to the first end surface of the annular seat portion 1321, the first end surface of the annular magnet 131 is connected to the second end surface of the second magnetic conductive ring 134, a magnetic circuit gap is formed between the outer annular surface of the second magnetic conductive ring 134 and the inner annular surface of the annular projection 1322, and the first voice coil 11 is located in the magnetic circuit gap.

Illustratively, on one hand, the second magnetic conductive ring 134 and the first magnetic conductive ring 133 can cooperate with the annular projection 1322 to perform a magnetic conductive function, so that the first magnetic field and the second magnetic field are limited in a magnetic circuit gap formed by the outer annular surface of the second magnetic conductive ring 134, the outer annular surface of the first magnetic conductive ring 133 and the inner annular surface of the annular projection 1322, and the strength and uniformity of the magnetic field in the magnetic circuit gap are further improved, thereby further improving the sensitivity of the speaker device and further reducing the distortion degree of vibration sound production; on the other hand, the second magnetic conductive ring 134 can be used as a spacer to increase the overall height of the ring magnet 131 stacked thereon, so as to reduce the height of the ring magnet 131 itself, thereby reducing the material and production cost of the ring magnet 131.

The material of the magnetic conductive seat 132, the first magnetic conductive ring 133, and the second magnetic conductive ring 134 can be SPHC hot rolled steel.

Based on the design criteria of the width of the magnetic circuit gap, the magnetic circuit gap can be minimized while reserving a space for the vibration of the first magnetic driving component 13, so that the parameters such as the sensitivity of the speaker device and the distortion of the vibration sound production can be optimized. Since the outer annular surface of the first voice coil 11 is significantly affected by thermal expansion and contraction and the coil winding causes a large difference in the outer diameter of the first voice coil 11, the magnetic path gap between the outer annular surface of the first voice coil 11 and the inner annular surface of the annular projection 1322 is set to be larger than the magnetic path gap between the inner annular surface of the first voice coil 11 and the outer annular surface of the first flux ring 133, which can better adapt to the above dimensional characteristics of the outer annular surface of the first voice coil 11.

It can be understood that, under the axial limiting action of the first and

second yokes

121, 122, the width dimension of the magnetic circuit gap can be substantially maintained during the vibration of the first magnetic driving assembly 13 relative to the first voice coil 11, so as to prevent the first magnetic driving assembly 13 from deviating radially and contacting the first voice coil 11 during the vibration.

Correspondingly, the embodiment of the present invention further provides a speaker device, which includes the fixing plate 2 and the electroacoustic driving apparatus 1 in any of the above embodiments; the fixed plate 2 has a medium surface 21, the first voice coil 11 is fixed to the medium surface 21, and the elastic member 12 is connected to the medium surface 21.

The fixing plate 2 in this embodiment may be a hard object such as a wooden desk plate, a mural panel 3, a glass cover plate, a metal piece, a box body, a wall body, etc., and the medium surface 21 may be any surface of the hard object.

Based on the improvement of the electroacoustic driving device 1 in the above embodiment, the loudspeaker device in this embodiment can use any medium surface 21 of any hard object as a sound generating body, and realize normal sound generation without using a cone, so that the sound generating function of the loudspeaker device is not limited by the size and installation requirement of the cone, and the applicability of the loudspeaker device is significantly improved; the sounding mode also breaks through the limitation of the sound cone on the sound direction, and the sound can be spread outwards at a large angle through the medium surface 21 with a large area and a wide coverage range, so that the sounding area is increased, the width of a sound field is improved, a balanced sound field in a larger space is obtained, the performance of the sound in a low-frequency area is improved, and a better hearing effect can be provided for a user; in addition, the improvement of the sound production area and the sound field width is equivalent to the increase of the number of the traditional loudspeakers, so that the material cost is indirectly reduced, the material cost and the processing cost are also reduced by omitting a sound cone and a sound cone matching part, and the overall cost of a loudspeaker device product is greatly saved.

As to the specific structure of the electroacoustic drive device 1, reference is made to the above-described embodiments. Since the loudspeaker device adopts all the technical solutions of all the embodiments of the electroacoustic driving apparatus 1, at least all the advantages brought by the technical solutions of the embodiments are achieved, and no further description is given here.

Alternatively, referring to fig. 1 to 4, the fixing plate 2 is a mural panel 3, and the mural panel 3 has a first side surface and a second side surface opposite to each other, the first side surface is inlaid with a mural body, and the second side surface is a dielectric surface 21.

The basic structure of the mural sound box on the market at present is that an ultrathin loudspeaker is arranged inside a mural panel 3, the surface of the mural is made of materials such as a breathable cloth net, and when the loudspeaker inside plays music, sound can penetrate through the breathable cloth net on the surface of the mural and is perceived by a user. The audio of this mural audio amplifier is subject to the size parameter of speaker itself, and in order to avoid the sound short circuit problem, the speaker need set up in the airtight box, so just increased the shared space of speaker structure, the suitability is relatively poor.

Based on the improvement of the electroacoustic driving apparatus 1 in the above-described embodiment, it can be applied to a wall-tone box. Specifically, the mural panel 3 is arranged on the wall, and the material thereof can be wood board or alloy material; the improved electroacoustic driving device 1 is arranged on the first side surface, facing outwards, of the mural panel 3, and the mural body is used for being watched by a user, and the second side surface, facing towards the wall, of the mural panel 3 serves as a medium surface 21; thus, the first voice coil 11 will generate the second magnetic field after being powered on, the first magnetic driving assembly 13 will vibrate under the interaction force between the second magnetic field and the first magnetic field, and the flexible assembly 12 will drive the mural panel 3 to vibrate to realize the sound production function, so as to play the music preset by the user.

The improved loudspeaker device is equivalent to only reserving a magnetic circuit part in the traditional mural loudspeaker, the improved loudspeaker device takes the mural panel 3 as a sound production main body, and the sound effect of the improved loudspeaker device is not limited by the size parameters of the loudspeaker, so that the applicability of the mural sound box is obviously improved; because the size of the mural panel 3 is larger, sound can be spread outwards at a large angle through the medium surface 21 with a wider coverage range, so that the sound production area is increased, the sound field width is improved, a balanced sound field with a larger space is obtained, the performance of the sound in a low-frequency area is improved, and a better auditory effect can be provided for a user; in addition, the improvement of the sound production area and the sound field width is equivalent to the increase of the number of the traditional mural loudspeakers, so that the material cost is indirectly reduced, devices such as a sound basin, a breathable cloth net and the like are also omitted, and the mural panel 3 has a larger size, so that the problem of sound short circuit can be avoided under the condition of omitting a closed box body, the material cost and the processing cost related to the devices such as the sound basin, the breathable cloth net, the closed box body and the like are reduced, and the overall cost of the mural loudspeaker box is greatly saved; in addition, because a closed box body is eliminated, the heat dissipation capacity of the mural sound box can be improved.

Alternatively, referring to fig. 4, the electroacoustic driving apparatus 1 may be disposed on the second side of the mural panel 3 in two left and right directions to improve the balance of the sound field and further improve the sound effect.

Further, referring to fig. 5 and 6, in another exemplary embodiment, the speaker device further includes a housing 4, and the housing 4 is provided with a receiving cavity 41; the fixing plate 2 is disposed to cover the accommodation concavity 41 so that the accommodation concavity 41 forms a closed chamber; the first voice coil 11, the elastic component 12 and the first magnetic driving component 13 are positioned in the closed chamber.

In this embodiment, the electroacoustic driving device 1 is disposed in a closed chamber to form a closed sound box. The casing 4 and the fixing plate 2 in the closed loudspeaker are rigidly connected, so that compared with the open loudspeaker for the mural panel 3 and the traditional loudspeaker using a cone in the previous embodiment, the loudspeaker has better waterproof effect, is more convenient to carry, and can avoid damage caused by scratch in the transfer process. In addition, due to the good waterproof effect, the loudspeaker device can be placed into liquid for use, and the liquid can be pushed to vibrate through the vibration of the shell 4 and the fixing plate 2, so that underwater sound production is achieved.

Alternatively, referring to fig. 5 and 6, the speaker device further includes a diaphragm 5, a second voice coil 6, and a second magnetic drive assembly 7; wherein:

a connecting through hole 42 is formed in the shell 4, and the connecting through hole 42 is communicated with the accommodating concave cavity 41; the vibrating diaphragm 5 covers the connecting through hole 42; the second voice coil 6 is positioned in the accommodating concave cavity 41, and the second voice coil 6 is connected to the diaphragm 5; the second magnetic driving assembly 7 is fixed in the accommodating concave cavity 41, the second magnetic driving assembly 7 has a third magnetic field, and the third magnetic field covers the second voice coil 6;

the second voice coil 6 generates a fourth magnetic field after being electrified, and the second voice coil 6 vibrates under the interaction force between the fourth magnetic field and the third magnetic field and drives the vibrating diaphragm 5 to vibrate to produce sound.

Since the electroacoustic driving device 1 using the hard object as the sounding main body has a better sound effect mainly in a low frequency region, in order to achieve a full-gamut effect, the present embodiment adds another electroacoustic driver mainly used for high-frequency sounding on the basis of the closed type sound box provided with the electroacoustic driving device 1. Specifically, after the alternating current is introduced into the coil winding of the second voice coil 6, a fourth magnetic field is generated, and the direction and the magnetic field strength of the fourth magnetic field change along with the changes of the phase, the amplitude, the frequency and other parameters of the alternating current; in the case that the third magnetic field generated by the second magnetic driving assembly 7 is a constant magnetic field, the change of the direction and the magnetic field strength of the fourth magnetic field will cause an attractive or repulsive force between the fourth magnetic field and the third magnetic field, under which a relative motion will occur between the second voice coil 6 and the second magnetic driving assembly 7; when the mutually attracting and repelling acting forces are switched alternately and rapidly, the second magnetic driving assembly 7 is fixed in the accommodating cavity 41, so that the relative motion between the second voice coil 6 and the second magnetic driving assembly 7 is represented as the vibration of the second voice coil 6 relative to the second magnetic driving assembly 7, and the vibration energy of the second voice coil 6 drives the vibrating diaphragm 5 to vibrate, so as to emit the sound with preset loudness and frequency.

Because the sound production area of the vibrating diaphragm 5 is smaller than the sound production area of the housing 4 and the fixing plate 2, the electroacoustic driver using the vibrating diaphragm 5 as the sound production main body can have a better sound effect in a high-frequency area, and can achieve a full-range effect by being matched with the electroacoustic driving device 1 having a better sound effect in a low-frequency area in the above embodiment, thereby providing a better hearing effect for a user.

Alternatively, referring to fig. 5 and 6, the first voice coil 11 and the second voice coil 6 may be coaxially disposed in the closed type sound box to save space.

It should be noted that other contents of the electroacoustic driving apparatus and the speaker device disclosed in the present invention can be referred to in the prior art, and are not described herein again.

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

Claims

1. An electro-acoustic driver apparatus, comprising:

the first voice coil is fixed on the medium surface;

the elastic component is connected to the medium surface;

2. The electro acoustic driver as claimed in claim 1, wherein said resilient member comprises a first spider and a second spider; wherein:

the outer edge part of the first centering support is connected to the medium surface, and the inner edge part of the first centering support is connected with the outer side part of the first magnetic driving assembly; the outer edge part of the second centering branch sheet is connected with the inner side part of the first magnetic driving assembly, and the inner edge part of the second centering branch sheet is connected to the medium surface;

the first magnetic drive assembly is spaced from the media side.

3. The electro-acoustic driver as claimed in claim 2, wherein said first magnetic driver assembly includes a ring magnet and a magnetically conductive base; wherein:

the magnetic conducting seat is provided with an annular seat body part and an annular bulge part, the annular bulge part is convexly arranged on the first end surface of the annular seat body part, the first end surface of the annular magnet is connected to the first end surface of the annular seat body part, and the first voice coil is positioned between the outer ring surface of the annular magnet and the inner ring surface of the annular bulge part;

4. The electro-acoustic driver as claimed in claim 3, wherein said first magnetic drive assembly further comprises a first magnetically permeable ring; wherein:

5. The electro-acoustic driver as claimed in claim 3, wherein said first magnetic drive assembly further comprises a second magnetically permeable ring; wherein:

the first end face of the second magnetic conductive ring is connected to the first end face of the annular seat portion, the first end face of the annular magnet is connected to the second end face of the second magnetic conductive ring, a magnetic circuit gap is formed between the outer annular face of the second magnetic conductive ring and the inner annular face of the annular protruding portion, and the first voice coil is located in the magnetic circuit gap.

6. The electro acoustic driver as claimed in claim 2, further comprising a connecting flange; one side end face of the connecting flange is connected to the medium face, and the other side end face of the connecting flange is connected with the outer edge portion of the first centering branch piece.

7. An acoustic speaker apparatus comprising a fixed plate and the electro-acoustic driving device according to any one of claims 1 to 6; the fixing plate is provided with a medium surface, the first voice coil is fixed on the medium surface, and the elastic assembly is connected to the medium surface.

8. The acoustic speaker apparatus of claim 7 wherein said holding plate is a mural panel having first and second opposing sides, said first side being inlaid with a mural body and said second side being said dielectric side.

9. The acoustic speaker apparatus of claim 7 further comprising a housing, said housing defining a receiving cavity; the fixing plate is arranged to cover the accommodating concave cavity, so that the accommodating concave cavity forms a closed cavity; the first voice coil, the elastic component and the first magnetic driving component are positioned in the closed cavity.

10. The acoustic speaker apparatus of claim 9 further comprising a diaphragm, a second voice coil, and a second magnetic drive assembly; wherein: