CN213880223U - Sound source coupling waveguide device and loudspeaker - Google Patents

Abstract

The utility model discloses a sound source coupling waveguide device and speaker, wherein sound source coupling waveguide device includes: a first coupling plate; a first sound wave guide groove is formed between the first plate and the first coupling plate, the first sound wave guide groove is provided with a first rectangular input port and a first rectangular output port, and the two first output ports are arranged on two sides of the first coupling plate in parallel; and a sound source module. This sound source coupling waveguide device, perpendicular array installation sound source module do not punishment at two second input ports, two first plates respectively with form first sound wave guide way between the first coupling plate, the sound wave that the sound source module of a plurality of arrays sent is input through first sound wave guide way diffusion from the first input port of two rectangles, form at two first output ports that parallel and join and radiate forward, first delivery outlet is the rectangle, thereby form the rectangle plane wave with the sound source module coupling of all perpendicular arrays of both sides on the horizontal direction, this utility model is used for speaker sound amplification technical field.

Description

Sound source coupling waveguide device and loudspeaker

Technical Field

The utility model relates to a speaker sound reinforcement technical field especially relates to sound source coupling waveguide device and speaker.

Background

Along with the improvement of the requirement of the loudspeaker on the reproduction quality in the sound reinforcement field, the requirement of sound pressure covering the far and near field ranges is consistent and uniform, and a line sound source with better sound reinforcement performance than the traditional point sound source is gradually popularized. The linear array loudspeaker box (loudspeaker system) formed by diffusing in a linear sound source mode is characterized in that the vertical angle of a single loudspeaker is small, the problem of sound interference between the loudspeakers is effectively solved, meanwhile, the sound pressure attenuation of the linear array loudspeaker box (loudspeaker system) is slow, the transmission distance is long, the common distance is doubled, and the sound pressure level is only reduced by 3 dB. The point sound source is diffused in a spherical wave mode and is characterized by large covering angle, fast sound pressure attenuation, usually doubled distance and 6dB reduction of sound pressure level.

The line source is composed of a series of driver systems with equal distance, the vertical pointing angle of the line source loudspeaker is very small, if the vertical pointing is 0 degree, the line source loudspeaker is called cylindrical wave, when the distance of the source is increased by one time, the energy of the cylindrical wave is attenuated by 3dB, and when the distance of the point source is increased by one time, the energy of the spherical wave (point source) is correspondingly attenuated by 6 dB. Therefore, the linear array loudspeaker covers the front area and the rear area of the audience, and the sound pressure is more uniform.

With the market demand, various manufacturers design loudspeakers based on cylindrical wave conversion, but in the related art, only the vertical array combination of a single sound source can be realized, and the coupling in the horizontal direction cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a sound source coupling waveguide device and speaker, can realize the coupling of a plurality of sound sources on level and vertical direction.

According to the utility model discloses an embodiment of the first aspect provides a sound source coupling waveguide device, include:

a first coupling plate;

the two first plate pieces are symmetrically arranged on two sides of the first coupling plate, a first preset gap is formed between the first plate pieces and the first coupling plate, a first sound wave guide groove is formed in the first preset gap, the first sound wave guide groove is provided with a first input port and a first output port, the first input port and the first output port are rectangular, the two first output ports are arranged on two sides of the first coupling plate in parallel, and the first sound wave guide groove is used for guiding sound waves to enable the sound waves to form coupling at the first output port; and

at least one sound source module arranged along the length direction of the first input port, wherein the sound source module is used for inputting sound waves to the first input port.

The sound source coupling waveguide device at least has the following beneficial effects: the sound source modules are respectively vertically arranged in the array mode at the two second input ports, a first sound wave guide groove is formed between the two first plates and the first coupling plate, sound waves emitted by the sound source modules in the arrays are input from the two first input ports and are diffused through the first sound wave guide grooves respectively, the sound waves are converged and radiated forwards at the two parallel first output ports, the first output ports are rectangular, and therefore the sound source modules of all vertical arrays on the two sides in the horizontal direction are coupled to form rectangular plane waves.

According to the embodiment of the first aspect of the present invention, the sound source module includes a second coupling plate and two waveguide assemblies, two waveguide assemblies are symmetrically disposed on two sides of the second coupling plate, the waveguide assemblies include a second plate and a third plate, the third plate is disposed between the second plate and the second coupling plate, the second plate has a first half and a second half, a second predetermined gap is disposed between the first half and the third plate and between the second half and the second coupling plate, the second predetermined gap is formed with a second guiding groove, the second guiding groove has a second input port and a second output port, the second output ports of the two waveguide assemblies are disposed on two sides of the second coupling plate in parallel, the second output port is rectangular, the second acoustic waveguide groove is used for guiding acoustic waves to enable the acoustic waves to form coupling at the second output port, and the second output port is connected with the first input port.

According to the utility model discloses the embodiment of the first aspect sound source coupling waveguide device, first half protrusion is formed with convex surface, be equipped with sunken concave surface on the third plate, convex surface with concave surface is parallel to each other, convex surface with concave surface's shape matches.

According to the utility model discloses sound source coupling waveguide device, the second plate is half circular cone, the half circular cone lateral wall of second plate does first half, convex surface is the half conical surface, half second does the half circular cone's of second plate oval tangent plane, half second with the side of second coupling plate is parallel.

According to the utility model discloses sound source coupling waveguide device, the concave curve be with the half-round conical surface that the convex surface matches, the third plate is close to the one end of second coupling plate is equipped with the opening, makes the second plate with can form between the second coupling plate the predetermined clearance of second.

According to the utility model discloses sound source coupling waveguide device, be equipped with first mounting plate on the second plate, one side of third plate is equipped with the second mounting plate and the opposite side is equipped with the third mounting plate, first mounting plate with the second mounting plate is connected, the third mounting plate with the second coupling plate is connected.

According to the utility model discloses the sound source coupling waveguide device of the embodiment of the first aspect, the second plate with on the third plate the position of second input port is equipped with the sound source fixed plate, the sound source fixed plate is used for installing the sound source, the second input port is circular.

According to the utility model discloses sound source coupling waveguide device of the embodiment of the first aspect, the second plate and/or the third plate and/or be equipped with on the second coupling plate and divide equally the grid of second sound wave guide groove.

According to the utility model discloses sound source coupling waveguide device, first coupling plate and two first plate forms a coupling unit, the coupling unit has threely, is first coupling unit and two second coupling units, two respectively the second coupling unit symmetry sets up the both sides of first coupling unit, each the first delivery outlet of second coupling unit with the first input port of first coupling unit is connected, the first input port department of second coupling unit sets up the sound source module.

According to a second aspect of the present invention, there is provided a loudspeaker including the above-mentioned sound source coupling waveguide device.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of a sound source coupled waveguide device according to an embodiment of the present invention;

fig. 2 is a top view of a sound source coupled waveguide device according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a sound source coupled waveguide device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coupling unit according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of a coupling unit according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a sound source module according to an embodiment of the present invention;

fig. 7 is an exploded schematic view of a sound source module according to an embodiment of the present invention;

fig. 8 is a front view of a sound source module according to an embodiment of the present invention;

fig. 9 is a side view of a sound source module according to an embodiment of the present invention;

fig. 10 is a schematic sectional structure diagram of a sound source module according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a second plate member according to an embodiment of the present invention;

fig. 12 is a schematic plan view of a second plate member according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a third plate member according to the embodiment of the present invention;

fig. 14 is a schematic plan view of a third plate member according to the embodiment of the present invention;

fig. 15 is a schematic sectional structure view of the sound source module according to embodiment a of the present invention at 90 °;

fig. 16 is an exploded view of a sound source module with a grille according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of an acoustic source coupled waveguide device having three coupling units according to an embodiment of the present invention;

reference numerals: the acoustic source module 100, the second coupling plate 20, the waveguide assembly 30, the second plate 31, the first half 311, the convex curved surface 3111, the second half 312, the first fastening plate 313, the third plate 32, the concave curved surface 321, the opening 322, the second fastening plate 323, the third fastening plate 324, the through hole 33, the acoustic source fixing plate 34, the reinforcing rib 35, the second acoustic waveguide groove 40, the second input port 41, the second output port 42, the coupling unit 50, the first coupling unit 51, the second coupling unit 52, the grille 60, the first coupling plate 70, the first plate 80, the first acoustic wave guide groove 90, the first input port 91, and the first output port 92.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 5, an embodiment of the present invention provides a sound source coupled waveguide device, including: a first coupling plate 70; the two first plate members 80 are symmetrically arranged on two sides of the first coupling plate 70, a first preset gap is formed between the first plate members 80 and the first coupling plate 70, a first sound wave guide groove 90 is formed in the first preset gap, the first sound wave guide groove 90 is provided with a first input port 91 and a first output port 92, the first input port 91 and the first output port 92 are rectangular, the two first output ports 92 are arranged on two sides of the first coupling plate 70 in parallel, and the first sound wave guide groove 90 is used for guiding sound waves so that the sound waves are coupled at the first output port 92; and at least one sound source module 100 arrayed along the length direction of the first input port 91, the sound source module 100 being configured to input sound waves to the first input port 91.

The sound source coupling waveguide device of this embodiment, install sound source module 100 at two perpendicular (Z direction) arrays respectively of second input 41, two first plates 80 form first sound wave guide way 90 respectively with first coupling plate 70 between, the sound wave that sound source module 100 of a plurality of arrays sent is imported from two rectangular first input 91 and is passed through first sound wave guide way 90 diffusion respectively, form at two first delivery outlet 92 that are abreast and converge and forward (Y direction) radiation, first delivery outlet 92 is the rectangle, thereby form the rectangular plane wave with all perpendicular array sound source module 100 couplings of both sides on the horizontal direction (X direction).

Compared with the existing loudspeaker structure which only can realize the combination use of the sound source vertical arrays, the sound source coupling waveguide device has the advantages that the sound source modules 100 are vertically arrayed on the two sides of the first coupling plate 70 in the horizontal direction and are coupled and output, higher sound pressure level can be obtained, the remote transmission is facilitated, and the distortion is reduced.

It is understood that the first plate member 80 and the first coupling plate 70 may be detachably connected, such as by bolts, or non-detachably connected, such as by welding, or integrally formed, so long as the relative fixation between the two is achieved and the structure of the first sound wave guide groove 90 is formed.

Referring to fig. 6 to 10, in the present embodiment, in order to obtain a higher sound pressure level, the sound source module 100 also adopts a coupling structure to couple two sound sources 10 in the Y direction to form a rectangular plane wave. Specifically, the sound source module 100 includes a second coupling plate 20 and two waveguide assemblies 30, the two waveguide assemblies 30 are symmetrically disposed on both sides of the second coupling plate 20, the waveguide assembly 30 includes a second plate 31 and a third plate 32, the third plate 32 is disposed between the second plate 31 and the second coupling plate 20, the second plate 31 has a first half 311 and a second half 312, a second predetermined gap is provided between the first half 311 and the third plate 32, and between the second half 312 and the second coupling plate 20, the second predetermined gap is formed with a second sound guiding groove 40, the second sound guiding groove 40 has a second input port 41 and a second output port 42, the sound sources 10 are respectively mounted at the second input ports 41 of the two waveguide assemblies 30, the second output ports 42 of the two waveguide assemblies 30 are disposed in parallel on both sides of the second coupling plate 20, the second output port 42 has a second rectangular shape, the sound waves are guided to the groove 40, the acoustic waves are coupled at the second output port 42, and the second output port 42 is connected to the first input port 91.

The sound waves emitted from the two sound sources 10 are input from the two second input ports 41, respectively, and are diffused into the groove 40 through the second sound guide, and are combined at the two second output ports 42 arranged in parallel and radiated to the first input port 91. Coupling out two sound sources 10 as a sound source module 100 input to the first input port 91 further enables a higher sound pressure level to be obtained.

The second acoustic waveguide groove 40 is divided into two sections, the first section is a gap between the first half 311 of the second plate 31 and the third plate 32, the second section is a gap between the second half 312 of the second plate 31 and the second coupling plate 20, and the acoustic wave is input from the second input port 41 and passes through the acoustic waveguide grooves of the first section and the second section in sequence.

Referring to fig. 11 and 13, in some embodiments, the waveguide assembly 30 guides the sound wave in the form of a curved surface, the first half 311 is convexly formed with a convex curved surface 3111, the third plate 32 is provided with a concave curved surface 321, the convex curved surface 3111 and the concave curved surface 321 are parallel to each other, and the shape of the convex curved surface 3111 and the shape of the concave curved surface 321 are matched.

Specifically, the second plate 31 is a semi-conical shape, the semi-conical sidewall of the second plate 31 is a first half portion 311, the convex curved surface 3111 is a semi-conical surface, the second half portion 312 is an elliptical cross-section of the semi-conical shape of the second plate 31, the second half portion 312 is parallel to the side surface of the second coupling plate 20, the concave curved surface 321 is a semi-conical surface matched with the convex curved surface 3111, and an opening 322 is formed at one end of the third plate 32 close to the second coupling plate 20, so that a second predetermined gap can be formed between the second plate 31 and the second coupling plate 20.

Referring to fig. 10, with the above-described conical surface structure, two sound sources 10 emit sound waves toward the center of the groove 40 along the second sound guide at the two second input ports 41, and a rectangular plane wave with a small distance error and an approximately equal distance can be formed by correcting the path difference through the path from the second sound guide into the groove 40. The sound wave propagates along the second acoustic waveguide to the groove 40 and the first half 311 and the second half 312 of the second plate member 31, the concave curved surface 321 of the third plate member 32, and the surface of the second coupling plate 20, and radiates the sound wave.

Referring to fig. 10 and 12, the distance from the second input port 41 to both ends of the rectangular second output port 42 is B, the length of the second output port 42 is H, and the distance from the second input port 41 to both ends of the rectangular second output port 42 is equal to the length of the second output port 42, that is, B is H, that is, the peripheral edges of the first half portion 311 and the second half portion 312 of the second plate 31 enclose an equilateral triangle; further, the centerline length of the first half portion 311 is equal to the centerline length of the second half portion 312, both being a, and a + a ═ B ═ H; referring to fig. 14, similarly, the concave curved surface 321 of the third plate 32 has a central line length a. In this way, the lengths of any shortest paths from the second input port 41 to the second output port 42 are all or almost equal, as in fig. 12, C + D is equal to B and H, i.e., C + D ═ a ═ B ═ H. The spherical wave input through the second input port 41 can be converted into a planar rectangular equidistant wave by modifying the path to the groove 40 through the second acoustic waveguide.

Specifically, in some embodiments, second input port 41 is circular, 25mm in diameter; the width of the second output port 42, that is, the width W of the second acoustic waveguide groove 40 (or the second predetermined gap between the second half 312 and the second coupling plate 20) is 18mm, and the size of W is related to the designed maximum operating frequency and is equal to the wavelength of the maximum operating frequency; the length H of the second output port 42 is 210 mm; the center line length a of the first half 311 and the second half 312 of the second plate member 31 is H/2 105 mm.

In some embodiments, the center line of convex curve 3111 on first half 311 is at an angle a with respect to the center line of second half 312, a being greater than or equal to 90 degrees and less than 180 degrees, i.e., 90 ≦ a < 180 °. The angle a is set according to actual needs, the angles a of the two waveguide assemblies 30 are equal, and referring to fig. 10, a is 135 °; referring to fig. 15, a is 90 °, in this case, a shorter depth can be obtained in the X direction, and the speaker can be ultra-thinned in product design, resulting in a smaller volume and lighter weight.

It will be appreciated that the second acoustic waveguide guides the acoustic wave to the groove 40, and the modified acoustic path is not limited to the curved structure in the form of the conical surface described above, but may also be other forms of reflective curved surface, such as circular parabola, hyperbola, ellipse, or various forms such as multi-channel, manifold, flat, or more generally, flat, concave, and convex.

In some embodiments, the second plate 31, the third plate 32 and the second coupling plate 20 are fixed in a detachable connection manner, a first fastening plate 313 is disposed on the second plate 31, a second fastening plate 323 is disposed on one side of the third plate 32, and a third fastening plate 324 is disposed on the other side of the third plate, the first fastening plate 313 is connected to the second fastening plate 323, the third fastening plate 324 is connected to the second coupling plate 20, and through holes 33 for connection are disposed on the first fastening plate 313, the second fastening plate 323, the third fastening plate 324 and the second coupling plate 20. The second plate member 31 and the third plate member 32 are relatively fixed by connecting the first fastening plate 313 and the second fastening plate 323 through the through holes 33 using fasteners; the third plate member 32 and the second coupling plate 20 are relatively fixed by connecting the third fastening plate 324 and the second coupling plate 20 with a fastening member through the through hole 33 of the third fastening plate and the second coupling plate 20. Specifically, the fastener may employ a screw.

It is understood that the second plate 31, the third plate 32 and the second coupling plate 20 may be connected together in a non-detachable manner, or may be formed integrally, as long as they are fixed to each other and form the structure of the second acoustic guiding groove 40.

In some embodiments, the second plate member 31 and the third plate member 32 are provided with a sound source fixing plate 34 at the position of the second input port 41, and the sound source fixing plate 34 is used for mounting the sound source 10.

Referring to fig. 16, in some embodiments, second plate 31 and/or third plate 32 and/or second coupling plate 20 are provided with a grating 60 that bisects second acoustic waveguide groove 40. The grating 60 serves to increase the strength of the component, and at the same time, to suppress resonance caused by physical properties of the material at a high sound pressure, and to reduce unnecessary diffraction of sound waves into the groove 40 by the second sound wave, thereby increasing the upper limit of the effective high frequency and reducing distortion.

In some embodiments, the second plate 31 and the third plate 32 are provided with a plurality of ribs 35, so as to improve the strength of the second plate 31 and the third plate 32 and the overall structure of the device.

Referring to fig. 17, it can be understood that, in some embodiments, in order to further obtain a higher sound pressure level, the first coupling plate 70 and the two first plate members 80 form one coupling unit 50, three coupling units 50 are respectively a first coupling unit 51 and two second coupling units 52, the two second coupling units 52 are symmetrically arranged at two sides of the first coupling unit 51, the first output port 92 of each second coupling unit 52 is connected with the first input port 91 of the first coupling unit 51, and the sound source modules 100 are arranged in an array at the two first input ports 91 of the second coupling unit 52. In this way, more coupling of the sound sources 10 in the horizontal and vertical directions can be achieved.

The sound source coupling waveguide device of the present embodiment may be made of a rigid material, such as metallic aluminum, ABS plastic, resin, carbon fiber, etc.

The embodiment of the utility model provides a still provide a speaker, including foretell sound source coupling waveguide device. The speaker including the above-described sound source coupling waveguide device realizes coupling of a plurality of sound sources 10 in the horizontal direction and in the vertical direction at the same time, thereby obtaining a higher sound pressure level.

It will be appreciated that the plurality of sound sources 10 may be the same specification sound sources operating at the same frequency to achieve a higher sound pressure output; or two different specification sources operating at different operating frequencies to achieve a wider effective operating bandwidth.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. An acoustic source coupled waveguide apparatus, comprising:

a first coupling plate;

the two first plate pieces are symmetrically arranged on two sides of the first coupling plate, a first preset gap is formed between the first plate pieces and the first coupling plate, a first sound wave guide groove is formed in the first preset gap, the first sound wave guide groove is provided with a first input port and a first output port, the first input port and the first output port are rectangular, the two first output ports are arranged on two sides of the first coupling plate in parallel, and the first sound wave guide groove is used for guiding sound waves to enable the sound waves to form coupling at the first output port; and

at least one sound source module arranged along the length direction of the first input port, wherein the sound source module is used for inputting sound waves to the first input port.

2. The acoustic source-coupled waveguide assembly of claim 1, wherein: the sound source module comprises a second coupling plate and two waveguide assemblies, the two waveguide assemblies are symmetrically arranged on two sides of the second coupling plate, the waveguide assemblies comprise a second plate and a third plate, the third plate is arranged between the second plate and the second coupling plate, the second plate is provided with a first half part and a second half part, second preset gaps are formed between the first half part and the third plate and between the second half part and the second coupling plate, a second sound guide groove is formed in the second preset gap, the second sound guide groove is provided with a second input port and a second output port, second output ports of the two waveguide assemblies are arranged on two sides of the second coupling plate in parallel, the second output port is rectangular, and the second sound guide groove is used for guiding sound waves to form coupling at the second output port, the second output port is connected with the first input port.

3. The acoustic source-coupled waveguide assembly of claim 2, wherein: the first half part is convexly provided with a convex curved surface, the third plate part is provided with a concave curved surface, the convex curved surface and the concave curved surface are parallel, and the shape of the convex curved surface is matched with that of the concave curved surface.

4. The acoustic source-coupled waveguide assembly of claim 3, wherein: the second plate is a semi-conical shape, the semi-conical side wall of the second plate is the first half, the convex curved surface is a semi-conical surface, the second half is the semi-conical elliptical section of the second plate, and the second half is parallel to the side surface of the second coupling plate.

5. The acoustic source-coupled waveguide assembly of claim 4, wherein: the concave curved surface is a semi-conical surface matched with the convex curved surface, and one end of the third plate close to the second coupling plate is provided with an opening, so that a second preset gap can be formed between the second plate and the second coupling plate.

6. The acoustic source-coupled waveguide assembly of claim 2, wherein: the first plate is provided with a first fastening plate, one side of the third plate is provided with a second fastening plate, the other side of the third plate is provided with a third fastening plate, the first fastening plate is connected with the second fastening plate, and the third fastening plate is connected with the second coupling plate.

7. The acoustic source-coupled waveguide assembly of claim 2, wherein: the second plate with on the third plate the position of second input port is equipped with the sound source fixed plate, the sound source fixed plate is used for installing the sound source, the second input port is circular.

8. The acoustic source-coupled waveguide assembly of claim 2, wherein: and a grid which bisects the second sound waveguide groove is arranged on the second plate and/or the third plate and/or the second coupling plate.

9. The sound source-coupled waveguide device according to any one of claims 1 to 8, wherein: the first coupling plate and the two first plates form a coupling unit, the number of the coupling units is three, the coupling units are respectively a first coupling unit and two second coupling units, the two second coupling units are symmetrically arranged on two sides of the first coupling unit, a first output port of each second coupling unit is connected with a first input port of the first coupling unit, and a first input port of each second coupling unit is provided with the sound source module.

10. A loudspeaker, characterized by: comprising an acoustic source coupling waveguide device according to any one of claims 1 to 9.

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