Plane waveguide tube horn with symmetrical structure
By setting a phase plug and guide partition in the horn speaker to evenly separate the sound wave guide, the problem of sound wave interference and distortion in traditional horn speakers is solved, the sound quality and sound output effect are improved, and the stability of the speaker is enhanced.
Patent Information
- Application Number
- CN202323255781.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-11-30
AI Technical Summary
Traditional horn speakers are prone to interfering with and distorting sound waves during sound wave transmission, especially in horizontally arranged linear array speakers, resulting in low sound efficiency and poor sound quality.
Design a plane waveguide horn with a structurally symmetrical structure. By setting a phase plug and a guide partition in the acoustic waveguide, evenly separate the acoustic waveguide into two guide channels on the left and right, and divide the inner part into multiple linear acoustic guide branches to avoid sound waves. Mutual interference and distortion.
It realizes uniform guidance of sound waves, reduces the vortex current in the voice coil, improves the sound quality and sound output effect, avoids mutual interference and distortion of sound waves, and enhances the stability of the speaker.
Smart Images
Figure CN222147758U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sound box structures, and mainly relates to a planar waveguide horn with a symmetrical structure. Background Art
[0002] The principle of horn speakers is that the diaphragm of the speaker vibrates, and the sound waves generated by the vibration of the diaphragm are amplified by the horn and then transmitted; the impedance of sound is very large, so the efficiency is also very high. During the transmission of sound waves inside the horn, the shape and length of the horn will affect the sound quality and timbre of the horn speaker. The vibration of the diaphragm radiates sound waves into the air through the horn. After two reflections inside the horn, traditional horns often cause mutual interference and distortion when transmitting sound. Existing ordinary line array speakers are usually composed of high-frequency parts and low-frequency parts. When arranged horizontally to form an array, different sound interferences will be formed on the left and right. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a planar waveguide horn with a symmetrical structure and good sound effect, in which a phase plug is arranged inside the sound waveguide as a main partition and a guide partition is arranged as a secondary partition to avoid mutual interference and distortion of up, down, left and right sound waves.
[0004] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:
[0005] A planar waveguide horn with a symmetrical structure is characterized in that it includes a longitudinally arranged sound waveguide, a sound inlet seat horizontally docked at the lower end of the sound waveguide, a sound outlet seat horizontally docked at the lower end of the sound waveguide, and a phase plug installed in the middle of the sound waveguide; the cross-section of the sound waveguide gradually increases from bottom to top, the phase plug is integrally formed with the sound waveguide, and the sound inlet seat and the sound outlet seat are arranged in parallel.
[0006] In a preferred embodiment of the utility model, the sound input seat includes an upper sound input plate, a lower sound input plate integrally formed with the upper sound input plate, and a sound input hole longitudinally penetrating the upper sound input plate and the lower sound input plate; the cross-sections of the upper sound input plate and the lower sound input plate are waist-shaped, and the longitudinal sections of the upper sound input plate and the lower sound input plate are combined into a T-shape; the cross-section of the sound input hole is circular.
[0007] In a preferred embodiment of the utility model, the sound outlet seat includes a horizontally arranged sound outlet plate and a sound outlet hole penetrating the middle of the sound outlet plate; the overall shape of the sound outlet plate is a rectangular parallelepiped, and a groove is horizontally arranged inwardly in the middle of the length direction of the sound outlet plate; the cross-section of the sound outlet hole is a rectangle.
[0008] In a preferred embodiment of the present utility model, the longitudinal section of the phase plug is rhombus-shaped, the four sides of the rhombus are equal, and the upper angle and lower angle of the rhombus are both acute angles; the bottom end of the phase plug is located at the lower end surface of the sound inlet hole, and the top end of the phase plug is located at the upper end surface of the sound outlet hole.
[0009] In a preferred embodiment of the present invention, a plurality of pairs of guide baffles are vertically arranged on the inner wall of the acoustic waveguide, and the plurality of pairs of guide baffles are symmetrically distributed on the left and right peripheries of the phase plug; the plurality of pairs of guide baffles divide the interior of the acoustic waveguide into a plurality of linear acoustic guide branches.
[0010] In a preferred embodiment of the present invention, at least one pair of mounting grooves are respectively provided on the front surface and the rear surface of the acoustic waveguide, wherein the pair of mounting grooves are symmetrically arranged on the upper side of the phase plug, the top ends of the pair of mounting grooves are located on the lower end surface of the sound output plate, and the overall shape of the pair of mounting grooves is an eight-shaped shape; a pair of auxiliary bolts are provided in the pair of mounting grooves, the pair of auxiliary bolts pass vertically through the pair of mounting grooves, and the pair of auxiliary bolts pass through the pair of guide baffles in turn and are installed on the acoustic waveguide.
[0011] The beneficial effects of the utility model are: a symmetrically structured planar waveguide horn, a phase plug is installed in the middle of the sound waveguide, the sound waveguide is evenly divided into two left and right guide channels, the sound wave is transmitted from the sound inlet seat to the sound outlet seat, and the sound waves in the left and right directions do not interfere with each other. The guide baffle divides the interior of the sound waveguide into a plurality of linear sound guide branches, the sound waves are diverted and transmitted inside the plurality of sound guide branches, avoiding mutual interference and distortion of the sound waves up, down, left and right, and achieving a good sound effect.
[0012] The cross-sections of the upper sound input plate and the lower sound input plate are set to be waist-shaped, and the sound output plate is set to be a cuboid; the overall shape of the duct horn is flat, which is convenient for overall installation in the speaker. The cross-section of the phase plug is a rhombus with four equal sides, and the middle part of the sound waveguide is symmetrically and evenly guided, which reduces the eddy current in the voice coil and thus reduces distortion. A pair of auxiliary bolts pass vertically through a pair of mounting grooves, and a pair of auxiliary bolts pass through a pair of guide baffles in turn and are installed on the sound waveguide. The double fixation prevents the guide baffles from loosening after long-term use, making it more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of a symmetrical planar waveguide horn of the utility model.
[0014] Figure 2 This is the second structural schematic diagram of a symmetrical planar waveguide horn of the utility model.
[0015] Figure 3It is a front view of a structurally symmetrical planar waveguide horn of the utility model.
[0016] Figure 4 It is a side view of a structurally symmetrical planar waveguide horn of the utility model.
[0017] Figure 5 It is a cross-sectional view of a structurally symmetrical planar waveguide horn of the utility model.
[0018] Figure 6 It is a front cross-sectional view of a planar waveguide horn with a symmetrical structure according to the utility model. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.
[0020] See also Figures 1 to 6 , the figure shows a symmetrical planar waveguide horn, including a longitudinally arranged sound waveguide 100, a sound inlet seat 200 horizontally docked at the lower end of the sound waveguide 100, a sound outlet seat 300 horizontally docked at the lower end of the sound waveguide 100, and a phase plug 400 installed in the middle of the sound waveguide 100; the cross section of the sound waveguide 100 gradually increases from bottom to top, the phase plug 400 is integrally formed with the sound waveguide 100, and the sound inlet seat 200 and the sound outlet seat 300 are both arranged horizontally and in parallel. The phase plug is installed in the middle of the sound waveguide, evenly dividing the sound waveguide into two left and right guide channels, and the sound waves are transmitted from the sound inlet seat to the sound outlet seat, and the sound waves in the left and right directions do not interfere with each other.
[0021] The overall shape of the front of the duct horn is bowl-shaped, and the left and right ends of the sound waveguide 100 are in an eight-shaped shape; the side view of the duct horn is in an eight-shaped shape, and the side surface is flat as a whole; the duct horn is overall in a flat bowl shape, which is suitable for most speakers and is easy to install inside the speaker.
[0022] The sound input seat 200 includes an upper sound input plate 210, a lower sound input plate 220 integrally formed with the upper sound input plate 210, and a sound input hole 230 longitudinally penetrating the upper sound input plate 210 and the lower sound input plate 220; the cross-sections of the upper sound input plate 210 and the lower sound input plate 220 are both waist-shaped, and the longitudinal sections of the upper sound input plate 210 and the lower sound input plate 220 are combined into a T-shape; the cross-section of the sound input hole 230 is circular.
[0023] The sound outlet seat 300 includes a horizontally arranged sound outlet plate 310 and a sound outlet hole 320 penetrating the middle of the sound outlet plate 310; the overall shape of the sound outlet plate 310 is a rectangular parallelepiped, and a groove 311 is horizontally arranged inwardly in the middle of the length direction of the sound outlet plate 310; the cross section of the sound outlet hole 320 is a rectangle. The cross sections of the upper sound inlet plate and the lower sound inlet plate are set to be waist-shaped, and the sound outlet plate is set to be a rectangular parallelepiped; the overall shape of the duct horn is flat, which is convenient for overall installation in the speaker; the groove 311 facilitates installation and clamping operations.
[0024] A phase plug mounting hole 110 is passed through the middle of the front and rear surfaces of the acoustic waveguide 100, and the phase plug 400 is mounted in the phase plug mounting hole 110; the longitudinal section of the phase plug 400 and the phase plug mounting hole 110 are both rhombus-shaped, the four sides of the rhombus are equal, and the upper and lower angles of the rhombus are both acute angles; the bottom end of the phase plug 400 is located at the lower end surface of the sound inlet hole 230, and the top end of the phase plug 400 is located at the upper end surface of the sound outlet hole 320. The cross section of the phase plug is a rhombus with four equal sides, and the middle part of the acoustic waveguide is symmetrically and evenly guided. The phase plug can effectively improve the frequency response characteristics, avoid the off-axis frequency response peak and valley phenomenon, reduce the eddy current in the voice coil, and thus reduce distortion.
[0025] Several pairs of guide baffles 510 are vertically arranged on the inner wall of the sound waveguide 100, and the several pairs of guide baffles 510 are symmetrically distributed on the left and right peripheries of the phase plug; the several pairs of guide baffles 510 divide the interior of the sound waveguide 100 into several linear sound guide branches 520. The guide baffles 510 include a longer first baffle 511 and a shorter second baffle 512, the bottom end of the first baffle 511 is located at the lower end surface of the sound inlet 230, and the top ends of the first baffle 511 and the second baffle 512 are both located at the upper end surface of the sound outlet 320. Several straight teeth 513 are formed at the top ends of the several guide baffles 510, and the several straight teeth are arranged in parallel along the length direction of the rectangle of the sound outlet. The guide baffles divide the interior of the sound waveguide into several linear sound guide branches, and the sound waves are diverted and transmitted inside the several sound guide branches, avoiding mutual interference and distortion of the sound waves up, down, left and right, and achieving a good sound output effect.
[0026] At least one pair of mounting grooves 120 are respectively arranged on the front surface and the rear surface of the sound waveguide 100. The pair of mounting grooves 120 are symmetrically arranged on the upper side of the phase plug 400. The top ends of the pair of mounting grooves 120 are located on the lower end surface of the sound output plate 320. The overall shape of the pair of mounting grooves 120 is an eight-shaped shape. A pair of auxiliary bolts are arranged in the pair of mounting grooves. The pair of auxiliary bolts pass through the pair of mounting grooves vertically. The pair of auxiliary bolts pass through the pair of longer guide baffles in turn and are installed on the sound waveguide. The double fixation prevents the guide baffles from loosening after long-term use, and is more stable and reliable.
[0027] A pair of docking blocks 130 are vertically arranged on the left and right end surfaces of the acoustic waveguide 100, and bolts 131 pass through a plurality of pairs of docking holes on the pair of docking blocks 130, and the ends are fixed by nuts; a docking groove is extended in the horizontal direction of the uppermost pair of docking holes to facilitate the installation of bolts; the front and rear of the acoustic waveguide are symmetrically arranged, and the peripheries of the left and right sides are fixed by bolts, and the left and right sides of the acoustic waveguide are tightly connected.
[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A symmetrical planar waveguide horn, It is characterized in that It includes a longitudinally arranged sound waveguide, a sound inlet seat horizontally docked at the lower end of the sound waveguide, a sound outlet seat horizontally docked at the lower end of the sound waveguide, and a phase plug installed in the middle of the sound waveguide; the cross-section of the sound waveguide gradually increases from bottom to top, the phase plug is integrally formed with the sound waveguide, and the sound inlet seat and the sound outlet seat are arranged in parallel.
2. A planar waveguide horn with a symmetrical structure as claimed in claim 1, It is characterized in that The sound input seat includes an upper sound input plate, a lower sound input plate integrally formed with the upper sound input plate, and a sound input hole longitudinally penetrating the upper sound input plate and the lower sound input plate; the cross-sections of the upper sound input plate and the lower sound input plate are both waist-shaped, and the longitudinal sections of the upper sound input plate and the lower sound input plate are combined into a T-shape; the cross-section of the sound input hole is circular.
3. A symmetrical planar waveguide horn as claimed in claim 1, It is characterized in that The sound outlet seat comprises a horizontally arranged sound outlet plate and a sound outlet hole penetrating the middle of the sound outlet plate; the overall shape of the sound outlet plate is a rectangular parallelepiped, and a groove is horizontally arranged inwardly in the middle of the length direction of the sound outlet plate; the cross section of the sound outlet hole is a rectangle.
4. A symmetrical planar waveguide horn as claimed in claim 2, It is characterized in that The longitudinal section of the phase plug is rhombus-shaped, the four sides of the rhombus are equal, and the upper and lower angles of the rhombus are acute angles; the bottom end of the phase plug is located at the lower end surface of the sound inlet, and the top end of the phase plug is located at the upper end surface of the sound outlet.
5. A planar waveguide horn with a symmetrical structure as claimed in claim 4, It is characterized in that A plurality of pairs of guide baffles are vertically arranged on the inner wall of the acoustic waveguide tube, and the pairs of guide baffles are symmetrically distributed on the left and right peripheries of the phase plug; the pairs of guide baffles divide the interior of the acoustic waveguide tube into a plurality of linear acoustic guide branches.
6. A symmetrical planar waveguide horn as claimed in claim 3, It is characterized in that At least one pair of mounting grooves are respectively arranged on the front surface and the rear surface of the acoustic waveguide, wherein the mounting grooves are symmetrically arranged on the upper side of the phase plug, the top ends of the mounting grooves are located on the lower end surface of the sound output plate, and the overall shape of the mounting grooves is an eight-shaped shape; a pair of auxiliary bolts are arranged in the mounting grooves, the auxiliary bolts pass through the mounting grooves vertically, and the auxiliary bolts pass through a pair of guide baffles in turn and are installed on the acoustic waveguide.