CN218006505U - Planar waveguide with path symmetry equidistant structure - Google Patents
Planar waveguide with path symmetry equidistant structure Download PDFInfo
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- CN218006505U CN218006505U CN202221816645.9U CN202221816645U CN218006505U CN 218006505 U CN218006505 U CN 218006505U CN 202221816645 U CN202221816645 U CN 202221816645U CN 218006505 U CN218006505 U CN 218006505U
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Abstract
The utility model discloses a path symmetry equidistance structure plane wave pipe, include: the sound entrance throat is a conical tapered structure; the phase plug of the sound outlet is in a parabolic outward-convex narrowing shape; the sound wave guide pipe is of an oval structure, one end of the sound wave guide pipe is communicated with the sound inlet throat, and the other end of the sound wave guide pipe is communicated with the sound outlet; elliptical arc-shaped sound wave guide channels are respectively formed between the left side and the right side between the sound inlet throat and the sound outlet, and are symmetrical and equidistant; the circular ring device of the sound entrance throat is provided with a horn fixing position corresponding to the sound wave guide pipe. The utility model discloses can turn into the wave (or rectangle plane wave) that have the camber with circular plane wave. In addition, the shape of the sound outlet phase plug is a parabolic outward-convex narrowing shape, and the trend of the path in the sound cavity is effectively controlled to the horizontal and vertical directivities of the waveguide tube.
Description
Technical Field
The embodiment of the utility model provides an audio equipment, concretely relates to route equidistance structure plane wave pipe.
Background
The bugle originates from the gramophone, and the principle of bugle is the vibrating diaphragm vibration through loudspeaker, and the sound wave that the vibrating diaphragm vibration produced is spread after enlargiing through the bugle, and the tone quality that the bugle was spread can all be influenced in the shape design and the length design of bugle, and traditional bugle is because shape design is unreasonable, and it is unreasonable to lead to sound to trend in the waveguide pipe, and the directive property is poor.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a planar waveguide with a symmetrical equidistant path structure, which is used to solve the above problems.
A path symmetric equidistant structure planar waveguide, comprising:
the sound entrance throat is a conical tapered structure;
the phase plug of the sound outlet is in a parabolic outward-convex narrowing shape;
the sound wave guide tube is of an oval structure, one end of the sound wave guide tube is communicated with the sound inlet throat, and the other end of the sound wave guide tube is communicated with the sound outlet;
elliptical arc-shaped sound wave guide channels are respectively formed between the left side and the right side between the sound inlet throat and the sound outlet, and are symmetrical and equidistant; and the circular ring device of the sound inlet throat is provided with a horn fixing position corresponding to the sound wave guide pipe.
Preferably: the shape of the sound inlet throat is basically the same as that of the sound outlet.
Preferably: one end of the sound outlet is provided with a rectangular sound-producing opening, the rectangular sound-producing opening forms an equilateral triangle which is opened within 10 degrees to vertically cover the angle, and the left side and the right side of the sound outlet, which point horizontally, are respectively provided with a fan-shaped diffusion plate.
Preferably: the path between the sound inlet throat and the rectangular sounding opening is in a streamline shape.
Preferably: the sound entrance throat has the same acoustic path length from the rectangular sounding opening.
Preferably: six reinforcing ribs are respectively arranged on each side of the outer surface of the sound wave guide pipe, and the length of at least four reinforcing ribs in the six reinforcing ribs is larger than half of the length from the sound inlet throat to the sound outlet.
Preferably: the maximum length of the acoustic wave guide tube is 265 mm and the maximum width thereof is 179 mm.
The embodiment of the utility model provides a path symmetry equidistance structure plane waveguide has following advantage:
a circular plane wave can be converted into a wave with curvature (or a rectangular plane wave).
In addition, the phase plug of the sound outlet is in a parabolic outward narrowing shape. The trend of the sound wave path of the waveguide tube is upgraded, and the trend of the path in the sound cavity is effectively controlled on the horizontal and vertical directivities of the waveguide tube.
Drawings
Fig. 1 is a perspective view of a planar waveguide with a symmetrical equidistant path structure according to the present invention;
FIG. 2 is a cross-sectional view of a prior art waveguide;
fig. 3 is a view of the first view angle of a planar waveguide with a symmetrical equidistant path structure according to the present invention;
fig. 4 is a cross-sectional view of the planar waveguide with a path symmetric equidistant structure according to the present invention.
Fig. 5 is a second view of the planar waveguide with a path symmetric equidistant structure according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a path symmetrical equidistance structure plane waveguide which is an oval structure, the middle part of the interior of the sound wave guide tube 3 is matched with the oval structure, one side of the sound inlet throat 1 is a conical taper-measuring structure, and one side of the sound outlet 2 is a sound wave guide head with an axe-shaped taper-measuring structure; one end of the acoustic wave guide tube 3 is provided with a circular acoustic entrance throat 1; elliptical arc-shaped sound wave guide channels are respectively formed between the left side and the right side of the sound outlet 2 of the sound inlet throat 1, and are symmetrical and equidistant; the circular ring device on the sound entrance throat 1 is provided with a horn fixing position corresponding to the sound wave guide pipe; the other end of the acoustic wave guide tube 3 is provided with a sound outlet 2; a rectangular sounding opening is formed at one end of a sounding opening 2 of the sound wave guide tube, an equilateral triangle formed by the rectangular sounding opening is opened within 10 degrees to vertically cover the opening, the sound energy is concentrated, meanwhile, strong covering directivity is achieved, and when a plurality of sound boxes are assembled, the horizontal left side and the horizontal right side of the rectangular sounding opening, caused by sound wave interference among the sound boxes, can be matched with a fan-shaped diffusion plate 4. The utility model discloses can install 1 high pitch or middle and high pitch loudspeaker unit, let drive unit's installation convenient and fast more, the design of the fan-shaped sound production opening of commissure lets the sound diffusion more even, accords with linear array plane wave characteristic, has effectively avoided sound mutual interference and distortion for the partial acoustic energy of well high pitch obtains inseparabler even directive in the coverage.
The plane waveguide of the present embodiment converts a circular plane wave into a rectangular plane wave or a wave with curvature.
The principle is as follows: the circular entrance has the same acoustic path length to the rectangular generating opening, i.e. the rectangular generating opening has equal phase at each of the corresponding frequencies.
Is characterized in that:
1. the path between the circular inlet and the rectangular generating opening is in a streamline shape, so that diffraction and echo interference in the sound cavity are reduced as much as possible. (diffraction will cause the wavefront to be irregular and the frequency response to be uneven).
2. The trend of the path in the acoustic cavity is effectively controlled by the horizontal and vertical directivities of the waveguide.
3. The change of the path width of the acoustic cavity effectively controls the working frequency band and lightens the standing wave effect in the acoustic cavity.
4. A reasonable acoustic impedance is provided to the driver to improve acoustic efficiency.
Specifically, the planar waveguide with the path symmetry equidistant structure shown in fig. 1, 3, 4 and 5 comprises the following components:
the sound entrance throat 1 is a conical tapered structure;
the phase plug 5 of the sound outlet 2 is in a parabolic outward narrowing shape;
the sound wave guide pipe 3 is of an oval structure, one end of the sound wave guide pipe is communicated with the sound inlet throat, and the other end of the sound wave guide pipe is communicated with the sound outlet;
elliptical arc-shaped sound wave guide channels are respectively formed between the left side and the right side between the sound inlet throat 1 and the sound outlet 2, and are symmetrical and equidistant; the circular ring device of the sound entrance throat 1 is provided with a horn fixing position corresponding to the sound wave guide pipe 3.
In the present invention, a circular plane wave can be converted into a wave with curvature (or a rectangular plane wave). In addition, compared with the shape of the sound wave guide phase plug shown in fig. 2 which is an inward concave narrowing shape, the shape of the sound outlet phase plug of the present invention shown in fig. 4 is a parabolic outward convex narrowing shape (an axe-shaped sound wave guide with a gradually tapering structure). By upgrading the trend of the sound wave path of the waveguide tube, the trend of the path in the sound cavity is effectively controlled to the horizontal and vertical directivities of the waveguide tube.
Preferably: the shape of the sound entrance throat 1 is substantially the same as the shape of the sound exit port 2. As shown in fig. 2, the shape of the sound inlet is different from that of the sound outlet in the related art, and the phase plug built in the sound outlet is sharper. As shown in fig. 4, the shape of the sound inlet is approximately the same as the shape of the sound outlet. The trend of the sound wave path of the waveguide tube is upgraded, and the trend of the path in the sound cavity is effectively controlled on the horizontal and vertical directivities of the waveguide tube.
Preferably: one end of the sound outlet 2 is provided with a rectangular sound-producing opening, the rectangular sound-producing opening forms an equilateral triangle which is opened within 10 degrees to vertically cover the angle, and the left side and the right side of the sound outlet, which point horizontally, are respectively provided with a fan-shaped diffusion plate 4. The utility model discloses in, 2 one ends of sound outlet are formed with rectangular sound production opening, and rectangular sound production opening forms equilateral triangle and opens 10 degrees within the angle of covering perpendicularly, when guaranteeing that the sound energy is concentrated, have strong cover directive property, when many audio amplifier array composite installations, reduce the sound wave between the audio amplifier and interfere. Moreover, 1 high pitch or middle high pitch loudspeaker can be installed, the installation of the driving unit is convenient and rapid, the fan-shaped sounding opening enables the sound to be spread more uniformly, the linear array plane wave characteristic is met, the mutual interference and distortion of the sound are effectively avoided, and the sound energy of the middle and high pitch part is directed more closely and uniformly in the coverage range.
Preferably: the path between the sound inlet throat 1 and the rectangular sounding opening is in a streamline shape. The utility model discloses in, through diffraction and echo interference in streamlined reduction sound cavity. (diffraction will cause the wavefront to be irregular and the frequency response to be uneven)
Preferably: the sound entrance throat 1 and the rectangular sounding opening have the same acoustic path length, namely the phase of each position of the corresponding frequency of the rectangular sounding opening is equal.
Preferably: the left side and the right side of the sound outlet 2 which point vertically are not provided with fan-shaped diffusion plates. Surround the structure for four sides, the utility model discloses only take the directional left and right sides of level to survey the diffuser plate, vertical direction's both sides and audio amplifier structure convolution becomes the diffusion.
Preferably: each side of the outer surface of the acoustic wave guide tube 3 is provided with six reinforcing ribs 6, and the length of at least four reinforcing ribs in the six reinforcing ribs is larger than half of the length from the sound inlet throat to the sound outlet.
Preferably: the maximum length of the acoustic wave guide tube is 265 mm and the maximum width thereof is 179 mm. The utility model provides a path width change of sound wave stand pipe has effectively controlled the work frequency channel of device to alleviate the standing wave effect in the sound cavity.
The above is only the preferred embodiment of the present invention, and the patent scope of the present invention is not limited thereby, and all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the same way in the patent protection scope of the present invention.
Claims (7)
1. A path symmetric equidistant structure planar waveguide, comprising:
the sound inlet throat is of a conical tapered structure;
the phase plug of the sound outlet is in a parabolic outward convex narrowing shape;
the sound wave guide pipe is of an oval structure, one end of the sound wave guide pipe is communicated with the sound inlet throat, and the other end of the sound wave guide pipe is communicated with the sound outlet;
elliptical arc-shaped sound wave guide channels are formed between the left side and the right side between the sound inlet throat and the sound outlet, and are symmetrical and equidistant; the circular ring device of the sound entrance throat is provided with a horn fixing position corresponding to the sound wave guide pipe.
2. The path symmetric equidistant structure planar waveguide of claim 1, wherein:
the shape of the sound inlet throat is basically the same as that of the sound outlet.
3. The path symmetric equidistant structure planar waveguide of claim 1, wherein:
one end of the sound outlet is provided with a rectangular sound production opening, the rectangular sound production opening forms an equilateral triangle which is opened within 10 degrees to vertically cover the angle, and the left side and the right side of the horizontal direction of the sound outlet are respectively provided with a fan-shaped diffusion plate.
4. The path symmetric equidistant structure planar waveguide of claim 3, wherein:
the path between the sound inlet throat and the rectangular sounding opening is streamline.
5. The path symmetric equidistant structure planar waveguide of claim 3, wherein:
the same acoustic path length is formed from the sound entrance throat to the rectangular sounding opening.
6. The path symmetric equidistant structure planar waveguide of claim 1, wherein:
six reinforcing ribs are respectively arranged on each side of the outer surface of the sound wave guide pipe, and the length of at least four reinforcing ribs in the six reinforcing ribs is larger than half of the length from the sound inlet throat to the sound outlet.
7. The path symmetric equidistant structure planar waveguide of claim 1, wherein: the maximum length of the acoustic wave guide tube is 265 mm and the maximum width thereof is 179 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816645.9U CN218006505U (en) | 2022-06-29 | 2022-06-29 | Planar waveguide with path symmetry equidistant structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816645.9U CN218006505U (en) | 2022-06-29 | 2022-06-29 | Planar waveguide with path symmetry equidistant structure |
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| Publication Number | Publication Date |
|---|---|
| CN218006505U true CN218006505U (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221816645.9U Active CN218006505U (en) | 2022-06-29 | 2022-06-29 | Planar waveguide with path symmetry equidistant structure |
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| CN (1) | CN218006505U (en) |
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2022
- 2022-06-29 CN CN202221816645.9U patent/CN218006505U/en active Active
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