Acoustic filter screen capable of adjusting power distribution and sound box

Abstract

The invention discloses an acoustic filter screen capable of adjusting power distribution. The acoustic filter screen comprises a filter screen body used for covering a sound outlet of a loudspeaker box and a through hole formed in the filter screen body. The filter screen body comprises a sector, a short arc edge and a long arc edge which are positioned at two ends of the sector, and a diameter edge for connecting the short arc edge and the long arc edge; the sector is bent downwards from the center of the sector to the two diameter sides to form a conical surface shape; the multiple through holes penetrate through the sector, and the hole diameters of the through holes are gradually increased in the direction from the short arc edge to the long arc edge. The invention also provides a sound box. According to the acoustic filter screen capable of adjusting power distribution, distribution and diffusion of acoustic energy are adjusted through the through holes, the diameters of the through holes are gradually increased from inside to outside, namely from the short arc edge to the long arc edge, and the perforation rate of the acoustic filter screen is gradually increased. By adjusting the acoustic filter screen, the sound energy is spread more uniformly, the unevenness of the sound pressure level of the listening surface is reduced, and the sound quality of the sound equipment is improved.

Description

Technical Field

[0001] The present invention relates to the field of sound boxes, and in particular to an acoustic filter and a sound box with adjustable power distribution. Background Art

[0002] Existing products often use sound columns and surface mounted speakers in conference systems. Affected by the building acoustic environment, the sound effect cannot be guaranteed. The directivity of the sound columns and surface mounted speakers cannot be effectively controlled, and the listening surface effect cannot be guaranteed. Summary of the invention

[0003] In order to solve the above problems, the present technical solution provides an acoustic filter with adjustable power distribution.

[0004] To achieve the above purpose, the technical solution is as follows:

[0005] An acoustic filter capable of adjusting power distribution comprises a filter body for covering a sound outlet of a sound box, and a through hole arranged on the filter body;

[0006] The filter body comprises a sector, a short arc side and a long arc side located at two ends of the sector, and a diameter side connecting the short arc side and the long arc side;

[0007] The fan surface is bent downward from its center toward the two diameter sides to form a conical surface;

[0008] A plurality of through holes penetrate the fan surface, and the apertures thereof gradually increase from the short arc side toward the long arc side.

[0009] In the acoustic filter with adjustable power distribution as described above, the through holes include circular holes.

[0010] In the acoustic filter with adjustable power distribution as described above, the angle c between the two diameter edges is 120°±5°.

[0011] In the acoustic filter with adjustable power distribution as described above, the angle d between the center line of the fan and the horizontal plane is 15°±5°.

[0012] In the acoustic filter with adjustable power distribution as described above, the center of the short arc edge gradually tilts downward toward both ends.

[0013] In the acoustic filter with adjustable power distribution as described above, a straight edge is provided between the end of the short arc edge and the diameter edge, and the straight edge coincides with the diameter of the circle where the short arc edge is located.

[0014] As described above, in an acoustic filter with adjustable power distribution, a plurality of through holes with the same diameter are arranged in a straight line to form a mesh group along a direction perpendicular to the center line of the fan surface, a plurality of groups of the mesh groups are arranged along the center line of the fan surface, and the apertures of the plurality of groups of the mesh groups decrease group by group as they approach the short arc edge.

[0015] In the acoustic filter with adjustable power distribution as described above, the through holes in two adjacent mesh groups are staggered.

[0016] In the acoustic filter with adjustable power distribution as described above, the fan surface is provided with mounting holes.

[0017] A speaker box, comprising an acoustic filter with adjustable power distribution as described above.

[0018] The beneficial effects of this application are:

[0019] The present invention provides an acoustic filter with adjustable power distribution. The through holes are used to adjust the distribution and diffusion of sound energy. The diameter of the through holes gradually increases from the inside to the outside, that is, from the short arc side to the long arc side, and the perforation rate of the acoustic filter gradually increases. By adjusting the acoustic filter, the sound energy propagation is more uniform, the unevenness of the sound pressure level on the listening surface is reduced, and the sound quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0021] Figure 1 This is the main view of the acoustic filter;

[0022] Figure 2 It is the left view of the acoustic filter;

[0023] Figure 3 This is a bottom view of the speaker;

[0024] Figure 4 yes Figure 3 A partial half-section view of

[0025] Figure 5 yes Figure 3 Structural breakdown diagram.

[0026] Figure 6 This is a schematic diagram of the speaker wiring structure. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the speaker wiring structure. Figure 2 ;

[0028] Figure 8 It is a partial structural diagram of the speaker;

[0029] Fig. 9 This is the structure diagram of the first speaker Figure 1 ;

[0030] Fig.10 This is the structure diagram of the first speaker Figure 2 ;

[0031] Fig.11 This is a schematic diagram of the structure of the inhibition mechanism. Figure 1 ;

[0032] Fig.12 This is a schematic diagram of the structure of the inhibition mechanism. Figure 2 . DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] An acoustic filter with adjustable power distribution, comprising a filter body 7 for covering the sound outlet of a sound box, and a through hole 431 provided on the filter body 7;

[0035] The filter body 7 includes a sector surface 71, a short arc edge 72 and a long arc edge 73 located at two ends of the sector surface 71, and a diameter edge 74 connecting the short arc edge 72 and the long arc edge 73;

[0036] The sector surface 71 is bent downward from the center thereof toward the two diameter edges 74 to form a conical surface;

[0037] The plurality of through holes 431 penetrate the sector surface 71 , and the hole diameters thereof gradually increase from the short arc side 72 toward the long arc side 73 .

[0038] The present invention provides an acoustic filter with adjustable power distribution. The through holes are used to adjust the distribution and diffusion of sound energy. The diameter of the through holes gradually increases from the inside to the outside, that is, from the short arc side to the long arc side, and the perforation rate of the acoustic filter gradually increases. By adjusting the acoustic filter, the sound energy propagation is more uniform, the unevenness of the sound pressure level on the listening surface is reduced, and the sound quality is improved.

[0039] Further, as a preferred implementation of the present solution but not limiting, the through hole 431 includes a circular hole. The circular hole diffuses sound uniformly.

[0040] Further, as a preferred implementation of the present solution but not a limitation, the angle c between the two diameter edges 74 is 120°±5°.

[0041] Furthermore, as a preferred implementation manner of the present solution but not a limitation, the angle d between the center line of the fan surface 71 and the horizontal plane is 15°±5°.

[0042] Furthermore, as a preferred implementation of the present solution but not a limitation, the center of the short arc edge 72 gradually tilts downward toward both ends.

[0043] Furthermore, as a preferred implementation manner of the present solution but not a limitation, a straight edge 75 is provided between the end of the short arc edge 72 and the diameter edge 74 , and the straight edge 75 coincides with the diameter of the circle where the short arc edge 72 is located.

[0044] Further, as a preferred embodiment of the present invention but not a limitation, a plurality of through holes 431 with the same diameter are arranged in a straight line in a direction perpendicular to the center line of the fan surface 71 to form a mesh group 76, and a plurality of groups of mesh groups 76 are arranged in the direction of the center line of the fan surface 71, and the apertures of the plurality of groups of mesh groups 76 decrease gradually toward the direction close to the short arc edge 72. This is conducive to the gradual expansion of the sound. Figure 1 The circular holes in the dotted part are a mesh group.

[0045] Further, as a preferred implementation of this solution but not a limitation, the through holes 431 in two adjacent mesh groups 76 are staggered, which is beneficial for uniform sound diffusion.

[0046] Further, as a preferred embodiment of the present invention but not limiting, the fan surface 71 is provided with a mounting hole 77, which can be connected to the housing of the speaker by screws.

[0047] A speaker box includes the above-mentioned acoustic filter with adjustable power distribution.

[0048] Specifically, the speaker includes

[0049] A bottom shell 1, in which a first sound box 13 and a second sound box 12 are arranged;

[0050] The surface shell 2 is connected to the bottom shell 1 and is provided with a first sound outlet 401 corresponding to the first speaker 13 and a second sound outlet 402 corresponding to the second speaker 12; the surface shell is provided with a panel, which can form a whole with the ceiling in visual effect.

[0051] The diffusion mechanism 4 includes a guide port 41 arranged corresponding to the first sound outlet 401 and used to guide the sound diffusion direction of the first speaker 13, and a guide plate 42 arranged corresponding to the second sound outlet 402 and used to guide the sound diffusion direction, and the extension direction of the guide port 41 intersects with the extension direction of the guide plate 42.

[0052] During installation, the guide plate is aligned with the required sound propagation direction to ensure that the sound can be effectively scattered when reflected and the energy can be evenly diffused. The bottom shell is embedded in the ceiling, and the surface shell and the ceiling can be perfectly integrated, truly invisible, with better directivity control, which is conducive to improving speech clarity and direct-to-mix ratio, and has better effects than traditional speakers.

[0053] Further, as a preferred implementation of this solution but not limiting, the first sound outlet 401 and the guide outlet 41 are synchronously arranged to be vertically downward, and the second sound outlet 402 is arranged toward the guide outlet 41 and perpendicular to the guide outlet 41. In this embodiment, the first speaker is a tweeter and the second speaker is a bass. Figure 2 Indicated by the arrow.

[0054] Further, as a preferred implementation of this solution but not a limitation, the guide plate 42 is gradually inclined downward from the upper part close to the second sound outlet 402 to facilitate guiding the propagation of sound.

[0055] Further, as a preferred implementation manner of the present solution but not a limitation, the guide plate 42 is fan-shaped and curved in a conical surface so as to be extended from the second sound outlet 402 .

[0056] Further, as a preferred embodiment of the present invention but not limiting, the acoustic filter 43 is arranged on the guide plate 42 to form a guide cavity 44 with the guide plate 42, and the acoustic filter 43 is provided with a plurality of through holes 431 connecting the guide cavity 44 with the outside. The acoustic filter is an acoustic filter with adjustable power distribution.

[0057] Further, as a preferred implementation manner of the present solution but not a limitation, the guide plate 42 at least partially covers the guide opening 41 .

[0058] Further, as a preferred implementation of the present solution but not a limitation, a lower plate 45 and an upper plate 46 are provided on the surface shell 2, and the upper plate 46 and the guide plate 42 are respectively located on the upper and lower sides of the second speaker 12 to jointly form the first sound outlet 401.

[0059] Further, as a preferred embodiment of the present invention but not a limitation, the lower plate 45 and the upper plate 46 together form a sound outlet cavity 47, the sound outlet cavity 47 is connected to the guide cavity 44, and the sound outlet cavity 47 gradually narrows toward the middle in the direction of the guide cavity 44. This can make the sound more concentrated and reduce the loss.

[0060] Furthermore, as a preferred embodiment of the present solution but not limiting, a narrow opening 48 narrowing from left to right is formed between the lower plate 45 and the upper plate 46 .

[0061] Further, as a preferred implementation manner of the present solution but not a limitation, the angular arc a of the guide plate 42 is 120°, and the included angle b between the guide plate 42 and the plane where the first sound outlet 401 is located is 15°.

[0062] Specifically, the speaker includes

[0063] Bottom shell 1;

[0064] The front shell 2 includes an inner shell portion 21 connected to the bottom shell 1 and used to be embedded in the ceiling, and an outer shell portion 22 connected to the inner shell portion 21 and used to press against the outside of the ceiling; the outer shell portion 22 protrudes relative to the inner shell portion 21 to form a mounting cavity 23;

[0065] The wiring mechanism 3 includes a wiring through hole 31 provided on the shell portion 22, and a first wiring terminal 32 provided in the installation cavity 23. The wiring through hole 31 passes through the shell portion 22 so that the power line can pass through the ceiling to the installation cavity 23 and connect with the first wiring terminal 32.

[0066] When wiring, the power cord in the ceiling is passed through the wiring through hole, and then connected to the first wiring terminal in the installation cavity, and then the ceiling speaker is installed on the ceiling, or the power cord is passed through the wiring through hole, and then the ceiling speaker is installed on the ceiling, and then the power cord is connected to the first wiring terminal. In this way, the wiring position in the ceiling can be avoided, which causes inconvenience in operation.

[0067] Further, as a preferred embodiment of the present invention but not limiting, the bottom shell 1 is provided with a wiring clearance portion 11, and the wiring clearance portion 11 is arranged along the axis extension direction of the wiring through hole 31, so as to facilitate the vertical insertion of the speaker wiring into the wiring through hole and avoid being stuck in other positions.

[0068] Further, as a preferred embodiment of the present invention but not limiting, the front of the outer shell 22 is provided with a connector clearance cavity 24 recessed toward the inner shell 21, and the wiring through hole 31 is provided at the bottom of the connector clearance cavity 24. The first wiring terminal in this embodiment is a European connector.

[0069] Further, as a preferred implementation of the present solution but not limiting, a communication port 25 is provided between the joint clearance cavity 24 and the installation cavity 23, and the communication port 25 is arranged toward the first wiring terminal 32, so as to facilitate the connection of the speaker to the first wiring terminal.

[0070] Further, as a preferred embodiment of the present invention but not a limitation, the connector clearance cavity 24 and the communication port 25 are both connected to the front of the shell 22, and the communication port 25 forms an opening 26 on the end surface of the shell 22, and a limiting piece 27 for limiting the power line in the communication port 25 is provided on the opening 26. The limiting piece can be a plastic sheet or a metal sheet.

[0071] Further, as a preferred implementation of the present solution but not limiting, the two limiting pieces 27 are spaced apart on both sides of the opening 26 and extend toward each other, which facilitates the insertion of the speaker wires and prevents the speaker wires from coming out.

[0072] Further, as a preferred embodiment of the present solution but not limiting, a convex column 28 for forming the joint clearance cavity 24 is convexly provided on the back of the outer shell 22, and the side wall of the convex column 28 is connected to the side wall of the inner shell 21 to increase the structural strength.

[0073] Further, as a preferred implementation of the present solution but not a limitation, the wiring through hole 31 is provided on a corner of the outer shell portion 22 , and the wiring clearance portion 11 is a chamfer connecting two side walls of the bottom shell 1 .

[0074] Further, as a preferred implementation of the present solution but not a limitation, the diameter of the wiring through hole 31 is smaller than the diameter of the connector clearance cavity 24 .

[0075] Specifically, the speaker includes

[0076] A bottom shell 1, in which a first sound box 13 is arranged;

[0077] A surface shell 2, which is connected to the bottom shell 1 and is provided with a first sound outlet 401 corresponding to the first sound box 13;

[0078] The first sound box 13 includes a dust cover 51, a sound disk 52, a disk frame 53, a fixed core support plate 54, a magnetic guide plate 55, a NdFeB magnet 56, and a magnetic guide column 57. The thickness of the NdFeB magnet 56 is less than the thickness of the magnetic guide plate 55 or the magnetic guide column 57.

[0079] Taking advantage of the characteristics of NdFeB magnets with high remanence, the same technical indicators can be achieved with smaller volume and lighter weight. At the same time, the weight can be reduced by reducing the thickness.

[0080] Furthermore, as a preferred embodiment of the present invention but not a limitation, a pressing edge 58 is provided between the first sound outlet 401 and the sound disk 52, the disk frame 53 includes a disk surface 531, and a retaining edge 532 protruding forward from the outer edge of the disk surface 531, and an installation cavity 533 for the pressing edge 58 to be embedded is formed between the retaining edge 532 and the disk surface 531.

[0081] Furthermore, as a preferred implementation mode of the present invention but not a limitation, the disk rack 53 also includes a connecting edge 534 protruding backward from the inner edge of the disk surface 531, a rear frame 535 for installing the core support plate 54, and a support frame 536 connecting the connecting edge 534 and the rear frame 535.

[0082] Further, as a preferred implementation of this solution but not limiting, the two sides of the support frame 536 are provided with support edges 537 extending from the connecting edge 534 along the support frame 536 toward the rear frame 535 and gradually thickening. This is beneficial to reduce the weight while strengthening the support frame.

[0083] Further, as a preferred implementation of this solution but not limiting, the plurality of support frames 536 are distributed at intervals around the circumference to form a support gap 538 between two support frames 536, which is beneficial to reduce weight.

[0084] Further, as a preferred embodiment of the present solution but not limiting, the rear frame 535 includes a connecting platform 5351 connected to the supporting frame 536, a mounting platform 5352 for mounting the fixed core support piece 54, and a rear side wall 5353 connecting the connecting platform 5351 and the mounting platform 5352. This is beneficial to reduce weight while enhancing strength.

[0085] Further, as a preferred embodiment of the present invention but not limiting, the rear frame 535 further includes a platform notch 5354 that penetrates both the mounting platform 5352 and the rear side wall 5353, and a plurality of the platform notches 5354 are circumferentially spaced apart, which is beneficial to reducing weight.

[0086] Further, as a preferred embodiment of the present invention but not limiting, the support edge 537 extends along the connecting platform 5351 to the rear side wall 5353, which is beneficial to enhance the strength.

[0087] Specifically, the speaker includes

[0088] A bottom shell 1, in which a first sound box 13 is arranged;

[0089] A surface shell 2, which is connected to the bottom shell 1 and is provided with a first sound outlet 401 corresponding to the first sound box 13;

[0090] The first speaker 13 is fixedly connected to the surface shell 2, and a suppression mechanism 6 is provided between the first speaker 13 and the bottom shell 1. The suppression mechanism 6 includes a shock-absorbing frame 61 with two ends respectively pressing on the top of the inner cavity of the bottom shell 1 and the top of the first speaker 13.

[0091] The first speaker has a high structural strength. The support frame is used as a support to connect the first speaker, the bottom shell and the top shell into a whole, which greatly improves the structural strength. Due to the improved structural strength, resonance can be avoided and the sound quality can be improved. On the other hand, the bottom shell can be made of thinner material, which reduces weight and cost.

[0092] Further, as a preferred embodiment of the present invention but not limiting, the shock absorbing frame 61 includes an upper top plate 611 for pressing on the bottom shell 1, a lower top plate 612 for pressing on the first speaker 13, and a shock absorbing portion 613 connecting the upper top plate 611 and the lower top plate 612. The upper top plate and the lower top plate are conducive to increasing the contact area and providing better support. The shock absorbing portion can be appropriately elastically deformed to achieve a shock absorbing and buffering effect.

[0093] Further, as a preferred implementation of this solution but not limiting, the two ends of the shock absorbing part 613 are respectively connected to the same side of the upper top plate 611 and the lower top plate 612. The support frame is made to be C-shaped as a whole, which is conducive to bending under force.

[0094] Further, as a preferred embodiment of the present invention but not limiting, the suppression mechanism 6 further includes a shock-absorbing member 62 disposed between the lower top plate 612 and the first speaker 13. Avoiding rigid contact with the first speaker can protect the first speaker from damage and reduce vibration.

[0095] Further, as a preferred embodiment of the present invention but not limiting, the shock absorber 62 is made of silicone or rubber, or can be made of materials with a buffering effect such as sponge or spring.

[0096] Furthermore, as a preferred implementation manner of the present solution but not a limitation, the upper top plate 611 is provided with a through hole 614 and a connecting member 615 provided on the through hole 614 and connected to the bottom shell 1 .

[0097] Further, as a preferred implementation of this solution but not limiting, the top surface of the bottom shell 1 is concavely provided with a reinforcing rib 63, and the connecting member 615 is riveted to the reinforcing rib 63. Providing the reinforcing rib is beneficial to reducing the thickness of the bottom shell while maintaining the strength.

[0098] Furthermore, as a preferred implementation of the present solution but not a limitation, the reinforcing rib 63 includes two straight ribs 631 extending diagonally along the bottom shell 1 and crossing each other to form a cross, and an arc rib 632 connecting the ends of two adjacent straight ribs 631 and protruding and bending toward the intersection.

[0099] Further, as a preferred embodiment of the present solution but not limiting, the first speaker 13 includes a magnetic guide post 57, a guide post hole 571 is provided in the middle of the magnetic guide post 57, and the lower top plate 612 is pressed against the magnetic guide post 57 and is arranged away from the guide post hole 571 to avoid affecting the sound of the first speaker.

[0100] Further, as a preferred implementation of this solution but not limiting, the connection between the shock absorbing part 613 and the upper top plate 611 and the lower top plate 612 is suspended relative to the bottom shell 1 and the magnetic guide column 57. This is conducive to elastic deformation of the shock absorbing part under force, thereby reducing shock.

[0101] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.

Claims

1. An acoustic filter with adjustable power distribution, characterized in that: It comprises a filter body (7) used for covering the sound outlet of the speaker, and a through hole (431) provided on the filter body (7); The filter body (7) comprises a sector surface (71), a short arc side (72) and a long arc side (73) located at two ends of the sector surface (71), and a diameter side (74) connecting the short arc side (72) and the long arc side (73); The fan surface (71) is bent downward from its center toward the two diameter edges (74) to form a conical surface; The plurality of through holes (431) penetrate the fan surface (71), and the hole diameters thereof gradually increase from the short arc side (72) toward the long arc side (73).

2. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: The through hole (431) comprises a circular hole.

3. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: The included angle c between the two diameter edges (74) is 120°±5°.

4. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: The angle d between the center line of the fan surface (71) and the horizontal plane is 15°±5°.

5. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: The center of the short arc edge (72) gradually slopes downward toward both ends.

6. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: A straight edge (75) is provided between the end of the short arc edge (72) and the diameter edge (74), and the straight edge (75) coincides with the diameter of the circle where the short arc edge (72) is located.

7. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: A plurality of through holes (431) having the same diameter are arranged in a straight line along a direction perpendicular to the center line of the fan surface (71) to form a mesh group (76); the plurality of mesh groups (76) are arranged along the center line direction of the fan surface (71), and the apertures of the plurality of mesh groups (76) decrease gradually in a direction approaching the short arc edge (72).

8. The acoustic filter with adjustable power distribution according to claim 7, characterized in that: The through holes (431) in two adjacent mesh groups (76) are arranged in a staggered manner.

9. The acoustic filter with adjustable power distribution according to claim 1, characterized in that: The fan surface (71) is provided with a mounting hole (77).

10. A speaker, characterized in that: It comprises an acoustic filter with adjustable power distribution as described in any one of claims 1-9.

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