Blocking structure for inverter tube

Abstract

The utility model relates to the technical field of sound box air pipes, in particular to a blocking structure for an inverter tube. Comprising an inverter tube, the inverter tube is provided with a first sound cavity, and the first sound cavity extends along a first direction and penetrates through two free ends of the inverter tube to form a first sound inlet and a first sound outlet; a blocking structure is arranged in the first sound cavity and comprises a plurality of blocking plates, the blocking plates are sequentially arranged at intervals in the second direction, and the extending direction of the second direction is different from the extending direction of the first direction. Compared with the prior art, the multiple baffles are arranged at intervals in the second direction, and the extension direction of the multiple baffles is different from the extension direction of the first direction of the first sound cavity; on the premise that external foreign matters are prevented from entering the sound box from the first sound cavity, the problems of acoustic abnormal sound and wind noise caused when airflow passes through can be reduced, and the technical defect that acoustic abnormal sound and audio signal distortion are easily caused by the arrangement of a protective net structure in the traditional technology is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound box air ducts, in particular to a barrier structure for an inverted tube. Background Art

[0002] Speaker ducts (also known as bass reflex ducts) are components made of plastic or paper. Their function is to enhance bass in musical instruments and sound systems. Ducts produce sound by vibrating and compressing different airflows, thereby helping to improve audio output efficiency. For example, with the same enclosure and the same electronic power, a speaker equipped with ducts can achieve an acoustic output power increase of more than double, significantly improving energy conservation and emission reduction, which is in line with market developments.

[0003] For example, Chinese utility model patent CN218830583U discloses a bass reflex pipe structure and a speaker, comprising: a bass reflex pipe and a center pipe. The center pipe is sleeved in the bass reflex pipe, with a gap between the center pipe and the bass reflex pipe. One end of the center pipe is connected to the bass reflex pipe, and a protective net is provided in the gap between the center pipe and the bass reflex pipe to prevent foreign matter from entering.

[0004] However, during the actual research and development process, the inventors discovered that using a protective net to prevent foreign matter from entering the speaker through the bass reflex port is inexpensive and easy to install. However, the multiple holes in the net can cause acoustic noise when air flows through the holes. The dynamic flow of the air duct also generates significant wind noise on the iron net, which can easily distort the audio signal output.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the shortcomings of the prior art. Its main purpose is to provide a barrier structure for an inverted tube, effectively resolving the technical defect in the prior art that an inverted tube equipped with a protective net is prone to causing abnormal noise, thereby reducing the occurrence of distorted audio signal output.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a barrier structure for a bass reflex tube, comprising a bass reflex tube, wherein the bass reflex tube is provided with a first sound cavity, the first sound cavity extending along a first direction and penetrating the two free ends of the bass reflex tube to form a first sound inlet and a first sound outlet; the characteristic is that a barrier structure is provided in the first sound cavity, the barrier structure comprises a plurality of barrier plates, the plurality of barrier plates are arranged in sequence at intervals along a second direction, and the extension direction of the second direction is different from that of the first direction.

[0008] The beneficial effect of the barrier structure for the bass reflex tube provided in the present application is that, compared with the prior art, multiple barrier plates are set, and the multiple barrier plates are set at intervals along the second direction, and the extension direction is different from the first direction of the first sound cavity; such a structure, using the barrier plates set at intervals, can reduce the acoustic noise and wind noise caused by the airflow while preventing foreign objects from entering the interior of the speaker from the first sound cavity, and effectively solve the technical defect of the traditional technology that the protective net structure is prone to cause acoustic noise and audio signal distortion.

[0009] As a preferred solution: the first sound cavity is extended along the first direction to form an arc-shaped cavity. When the bass reflex tube is installed in the speaker, the first sound outlet is higher than the first sound inlet.

[0010] As a preferred solution: the first sound inlet is vertically arranged, and each blocking plate is vertically extended; the angle between the second direction and the first sound inlet is between 65 degrees and 85 degrees.

[0011] As a preferred solution: the thickness of the plurality of barrier plates are the same, and the distance between each two barrier plates is more than three times the thickness of the barrier plates.

[0012] As a preferred solution: a plurality of arc-shaped convex portions are provided on the surface of the first sound cavity, and the plurality of arc-shaped convex portions are sequentially arranged at intervals along the first direction, and an arc-shaped groove is formed between every two arc-shaped convex portions.

[0013] As a preferred solution: the blocking plate is arranged close to one side of the first sound outlet, and the multiple arc-shaped protrusions are located between the first sound outlet and the blocking plate.

[0014] As a preferred solution, the inverted tube includes a first shell and a second shell arranged on the left and right, the first shell and the second shell are assembled together to enclose a first sound cavity;

[0015] The sides of the first shell and the second shell facing the first sound cavity are both provided with a plurality of baffles, and each baffle extends toward the center of the first sound cavity;

[0016] The arc-shaped convex parts are respectively convexly arranged on the side surfaces of the first shell and the second shell facing the first sound cavity.

[0017] As a preferred solution: the first housing is provided with a first assembly portion, and the second housing is provided with a second assembly portion;

[0018] One of the first assembly portion and the second assembly portion is provided with a first assembly ridge, and the other is provided with a first assembly groove;

[0019] When the first shell and the second shell are assembled together, the first assembly portion and the second assembly portion abut against each other and the first assembly protrusion is inserted into the first assembly groove.

[0020] As a preferred solution: one of the first shell and the second shell is provided with a first positioning column, and the other is provided with a first positioning hole; when the first shell and the second shell are assembled together, the first positioning column can be inserted into the first positioning hole.

[0021] As a preferred solution: the first shell and the second shell are provided with a first assembly notch at the first sound inlet, and the first assembly notch is used for installing a sealing strip;

[0022] When the bass reflex tube is installed in the speaker, the sealing strip can rest against the surface of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 1 is a schematic diagram of the three-dimensional structure of a barrier structure for an inverted tube provided in an embodiment of the present application;

[0025] Figure 2 yes Figure 1 An exploded view of the barrier structure for the reflex tube is shown;

[0026] Figure 3 yes Figure 2 A front view of the first shell in the barrier structure for the inverted tube is shown;

[0027] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the barrier structure for the inverted tube from another angle is shown;

[0028] Figure 5 yes Figure 2 A rear view of the second housing in the barrier structure for a reflex tube is shown.

[0029] Among them, the reference numerals in the figures are:

[0030] 10. Inverter tube; 101. First housing; 102. Second housing; 103. First assembly portion; 104. Second assembly portion; 105. First assembly ridge; 106. First assembly groove; 107. First positioning post; 108. First positioning hole; 109. First assembly notch; 11. First sound cavity; 12. First sound inlet; 13. First sound outlet; 14. Arc-shaped ridge; 15. Arc-shaped groove;

[0031] 20. Barrier structure; 21. Barrier plate;

[0032] x1, first direction; x2, second direction; a1, first angle. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application 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 only used to explain this application and are not intended to limit this application.

[0034] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do 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 therefore cannot be understood as a limitation on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0038] Please also refer to Figures 1 to 5 The barrier structure 20 for the inverted tube 10 provided in the embodiment of the present application is now described. The barrier structure 20 for the inverted tube 10 includes: the inverted tube 10 and the barrier structure 20.

[0039] The bass reflex tube 10 is provided with a first sound cavity 11, which extends along a first direction x1 and passes through the two free ends of the bass reflex tube 10 to form a first sound inlet 12 and a first sound outlet 13; a blocking structure 20 is provided in the first sound cavity 11, and the blocking structure 20 includes a plurality of blocking plates 21, which are arranged in sequence at intervals along a second direction x2, and the second direction x2 extends in a different direction from the first direction x1.

[0040] Specifically, by setting up multiple baffles 21, and the multiple baffles 21 are set at intervals along the second direction x2, and are different from the extension direction of the first direction x1 of the first sound cavity 11; with such a structure, the baffles 21 set at intervals can reduce the acoustic noise and wind noise caused by the passage of airflow while preventing foreign objects from entering the interior of the speaker from the first sound cavity 11, and effectively solve the technical defect of the traditional technology that the protective net structure is prone to cause acoustic noise and audio signal distortion.

[0041] In some embodiments of the present application, the first sound cavity 11 extends along a first direction x1 to form an arc-shaped cavity. When the bass reflex tube 10 is installed in the speaker, the first sound outlet 13 is higher than the first sound inlet 12. The first sound inlet 12 is vertically disposed, and each baffle 21 extends vertically. The angle between the second direction x2 and the first sound inlet 12 is between 65 and 85 degrees.

[0042] See IPX waterproof rating standard (0-8)

[0043] The international industrial waterproof grade standard IPx and the Japanese industrial waterproof standard JS grade are consistent, and are divided into 9 levels from 0 to 8.

[0044] Level 0 no protection

[0045] Level 1: Eliminates the harmful effects of falling water drops

[0046] Level 2 provides protection against water drops falling within 15 degrees from the vertical direction

[0047] Level 3 can eliminate the harmful effects of spray droplets at 60 degrees from vertical

[0048] Level 4 eliminates the harmful effects of water splashing from different directions

[0049] Level 5 can eliminate harmful effects on the nozzle water flow in all directions

[0050] Level 6 can eliminate the harmful effects of strong water jets from nozzles in all directions

[0051] The top of level 7 is 0.15-1 meter away from the water surface for 30 minutes without any impact on performance or leakage.

[0052] The top of the 8th level is 1.5-30 meters away from the water surface for 60 minutes without any impact on performance or leakage.

[0053] As can be seen, when multiple first baffles 21 are spaced apart along the second direction x2, the angle between the second direction x2 and the first sound inlet 12 is defined as first angle a1, and the value of first angle a1 is 70 degrees. Combined with the vertically arranged first sound inlet 12, the structure can achieve a waterproof rating of Level 4 when tested. Furthermore, the spacing of multiple baffles 21 is less prone to clogging than conventional structures using protective nets, further reducing the risk of acoustic noise. It also reduces wind noise generated when the audio airflow passes through the protective net, preventing audio signal distortion.

[0054] More specifically, the thickness of the plurality of baffles 21 is the same, and the distance between each two baffles 21 is at least three times the thickness of the baffles 21. This structure can effectively prevent foreign matter from entering the speaker through the first sound cavity 11 in a finger-blocking test.

[0055] In other embodiments of the present application, a plurality of arcuate protrusions 14 are provided on the surface of the first sound cavity 11. The plurality of arcuate protrusions 14 are sequentially spaced along the first direction x1, with an arcuate groove 15 formed between every two arcuate protrusions 14. A baffle plate 21 is provided near one side of the first sound outlet 13, with the plurality of arcuate protrusions 14 located between the first sound outlet 13 and the baffle plate 21.

[0056] Specifically, the curved protrusion 14 and the curved groove not only prevent water from flowing directly into the speaker through the first sound cavity 11, but also reduce the wind resistance during the output of the audio airflow by utilizing the wave-like structure of the curved protrusion 14 and the curved groove. This further improves safety requirements and waterproof performance, while effectively amplifying acoustic power.

[0057] In some embodiments of the present application, the bass reflex tube 10 includes a first shell 101 and a second shell 102 arranged on the left and right. The first shell 101 and the second shell 102 are assembled together and enclose a first sound cavity 11; the sides of the first shell 101 and the second shell 102 facing the first sound cavity 11 are provided with multiple baffles 21, and each baffle 21 extends toward the center of the first sound cavity 11; the arc-shaped protrusions 14 are respectively protruded on the sides of the first shell 101 and the second shell 102 facing the first sound cavity 11.

[0058] Specifically, the first shell 101 is provided with a first assembly portion 103, and the second shell 102 is provided with a second assembly portion 104; one of the first assembly portion 103 and the second assembly portion 104 is provided with a first assembly ridge 105, and the other is provided with a first assembly groove 106; when the first shell 101 and the second shell 102 are assembled together, the first assembly portion 103 and the second assembly portion 104 abut against each other and the first assembly ridge 105 is inserted into the first assembly groove 106.

[0059] Next, the first housing 101 and the second housing 102 have a first positioning post 107 on one side and a first positioning hole 108 on the other side. When the first housing 101 and the second housing 102 are assembled together, the first positioning post 107 is inserted into the first positioning hole 108 .

[0060] It can be understood that most of the structures of the first shell 101 and the second shell 102 are the same. The difference is that the first assembly protrusion 105 and the first assembly groove 106, the first positioning column 107 and the first positioning hole 108 need to be respectively provided in the first shell 101 and the second shell 102 according to the actual assembly method; as long as it can be achieved, after the first shell 101 and the second shell 102 are assembled, the first assembly protrusion is inserted into the first assembly groove 106, and the first positioning column 107 is inserted into the first positioning hole 108.

[0061] It should be noted here that the length of the first positioning column 107 needs to be greater than the length of the first assembly protrusion, so that the first positioning column 107 can be inserted into the first positioning hole 108 in advance to complete the positioning of the first shell 101 and the second shell 102, and then continue to assemble the first shell 101 and the second shell 102 so that the first assembly protrusion is inserted into the first assembly groove 106 to complete the assembly.

[0062] Meanwhile, the first shell 101 and the second shell 102 can be assembled by interference fit, screw fastening, glue bonding, ultrasonic welding, etc.

[0063] In more detail, the first shell 101 and the second shell 102 are provided with a first assembly notch 109 at the first sound inlet 12, and the first assembly notch 109 is used to install a sealing strip; when the bass reflex tube 10 is installed in the speaker, the sealing strip can be against the surface of the speaker.

[0064] It should be noted that when the bass reflex tube 10 is installed inside the speaker by fastening with screws, corresponding screw holes and other structures need to be provided on the outer surfaces of the first shell 101 and the second shell 102 for screw locking. This is a conventional design method for those skilled in the art and will not be elaborated here.

[0065] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A barrier structure for an inverted tube, comprising an inverted tube (10), wherein the inverted tube (10) is provided with a first sound cavity (11), wherein the first sound cavity (11) extends along a first direction (x1) and passes through two free ends of the inverted tube (10) to form a first sound inlet (12) and a first sound outlet (13); characterized in that: A barrier structure (20) is provided in the first sound cavity (11), the barrier structure (20) comprising a plurality of barrier plates (21), the plurality of barrier plates (21) being sequentially spaced along a second direction (x2), the second direction (x2) extending in a direction different from that of the first direction (x1).

2. The barrier structure for an inverted tube according to claim 1, characterized in that: The first sound cavity (11) is extended along a first direction (x1) to form an arc-shaped cavity. When the inverted tube (10) is installed in the sound box, the first sound outlet (13) is higher than the first sound inlet (12).

3. The barrier structure for an inverted tube according to claim 1 or 2, characterized in that: The first sound inlet (12) is vertically arranged, and each baffle (21) is vertically extended; the angle between the second direction (x2) and the first sound inlet (12) is between 65 degrees and 85 degrees.

4. The barrier structure for an inverted tube according to claim 3, characterized in that: The thickness of the plurality of baffle plates (21) are all the same, and the distance between each two baffle plates (21) is more than three times the thickness of the baffle plates (21).

5. The barrier structure for an inverted tube according to claim 1, 2 or 4, characterized in that: A plurality of arc-shaped convex portions (14) are provided on the surface of the first sound cavity (11), and the plurality of arc-shaped convex portions (14) are sequentially spaced along the first direction (x1), with an arc-shaped groove (15) formed between every two arc-shaped convex portions (14).

6. The barrier structure for an inverted tube according to claim 5, characterized in that: The baffle plate (21) is arranged close to one side of the first sound outlet (13), and the plurality of arc-shaped protrusions (14) are located between the first sound outlet (13) and the baffle plate (21).

7. The barrier structure for an inverted tube according to claim 5, characterized in that: The inverted tube (10) comprises a first shell (101) and a second shell (102) arranged on the left and right, wherein the first shell (101) and the second shell (102) are assembled together and enclose a first sound cavity (11); The first shell (101) and the second shell (102) are both provided with a plurality of baffles (21) on the side facing the first sound cavity (11), and each baffle (21) extends toward the center of the first sound cavity (11); The arc-shaped convex portions (14) are respectively convexly arranged on the side surfaces of the first shell (101) and the second shell (102) facing the first sound cavity (11).

8. The barrier structure for an inverted tube according to claim 7, characterized in that: The first shell (101) is provided with a first assembly portion (103), and the second shell (102) is provided with a second assembly portion (104); The first assembly portion (103) and the second assembly portion (104), one of which is provided with a first assembly ridge (105), and the other of which is provided with a first assembly groove (106); When the first shell (101) and the second shell (102) are assembled together, the first assembly portion (103) and the second assembly portion (104) abut against each other and the first assembly ridge (105) is inserted into the first assembly groove (106).

9. The barrier structure for an inverted tube according to claim 7 or 8, characterized in that: One of the first shell (101) and the second shell (102) is provided with a first positioning column (107), and the other is provided with a first positioning hole (108); when the first shell (101) and the second shell (102) are assembled together, the first positioning column (107) is inserted into the first positioning hole (108).

10. The barrier structure for an inverted tube according to claim 7 or 8, characterized in that: The first shell (101) and the second shell (102) are provided with a first assembly notch (109) at the first sound inlet (12), and the first assembly notch (109) is used for installing a sealing strip; When the inverted phase tube (10) is installed in the speaker, the sealing strip can abut against the surface of the speaker.

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