Inverter tube and sound box

Abstract

The utility model relates to the technical field of loudspeaker sound boxes, and provides an inverter tube and a sound box, and the inverter tube comprises a main channel through which gas in the sound box flows out; the at least one branch channel is arranged on at least one side of the main channel, an inlet and an outlet of the branch channel are both communicated with the main channel, and the branch channel and the main channel form a Tesla one-way valve structure; the flow direction of gas at the outlets of the branch channels and the flow direction of gas in the main channel are in a reverse flow trend on the whole, so that vortexes are formed at the outlets of the branch channels, and the flow speed of the gas in the main channel is slowed down. According to the utility model, the problem of wind noise caused by airflow sound existing in the inverter tube on the conventional sound box can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to loudspeaker sound box technical field especially relates to a kind of inverted phase pipe and sound box. BACKGROUND

[0002] The kind of loudspeaker sound box is roughly divided into closed box, open box, with passive radiator box body.The closed box low-frequency extension effect is not good, unless the volume of box is sufficient, the volume of sound box in general equipment application is limited, and the box needs to be designed for low-frequency extension.With passive radiator box also has low-frequency extension effect, also has no wind noise problem, but the cost is relatively high.Open box adopts the design of certain ratio of cross-sectional area and length inverted phase pipe, without additional cost, low-frequency extension effect is also good, the disadvantage is that inverted phase pipe has airflow sound.

[0003] Under this background, how to reduce inverted phase pipe airflow sound on open box is particularly important, airflow is too large not only vortex is formed at outlet to form howling sound, and other components cannot be placed near pipe opening in the whole machine stacking, otherwise airflow blows up to also easily form noise, to restrict the stacking of each component in the whole machine. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of inverted phase pipe and sound box, solve the wind noise problem caused by airflow sound of inverted phase pipe on existing sound box.

[0005] The above technical purpose of the utility model is mainly realized by the following technical scheme:

[0006] The utility model provides a kind of inverted phase pipe, it includes: main channel, for the outflow of gas in sound box;At least one branch channel is arranged in at least one side of the main channel, the inlet and outlet of the branch channel are communicated with the main channel and form the structure of the one-way valve of Tesla with the main channel;Wherein, the gas flow direction at the outlet of the branch channel is generally opposite to the gas flow direction in the main channel, to form vortex at the outlet of the branch channel and slow down the gas flow rate in the main channel.

[0007] The inverted phase pipe of the utility model, although it uses completely different gas pipeline structure with existing inverted phase pipe, but retains the original low-frequency extension effect of inverted phase pipe.

[0008] The inverted phase pipe of the utility model, under the action of the structure of the one-way valve of Tesla, the outflow airflow speed is relatively small, and the wind noise caused by airflow is small, without worrying about the occurrence of howling sound, and the sound quality is pure.

[0009] The reverse phase pipe, the sound box design can adopt the open box design without worrying about the future; the cross-sectional area of the main channel can be selected as required, and it is unnecessary to worry about that too small cross-sectional area leads to too large airflow velocity; it is unnecessary to deliberately design the horn mouth at the import and export of the main channel to increase the mold difficulty; in the whole machine stacking, the rest components need not be too far away from the import and export of the reverse phase pipe, space is saved, the whole machine stacking is facilitated, or the saved space is used as the box space, and better low frequency effect is obtained.

[0010] In a preferred embodiment of the present application, the reverse phase pipe comprises: a main shell, a main channel is formed in the main shell; at least one branch shell is connected to at least one side of the main shell, and a branch channel is formed in the branch shell.

[0011] In the embodiment, the reverse phase pipe adopts a pipeline split structure, wherein the main channel and the branch channel are respectively processed and formed, and then the branch shell is connected to the opening on the side edge of the main shell; since the main shell and the branch shell are respectively processed and formed, the cross-sectional area of the channel can be controlled, and various types of branch shells can be replaced to obtain different deceleration effects of the airflow in the main channel.

[0012] In a preferred embodiment of the present application, the reverse phase pipe comprises: oppositely arranged upper and lower cover plates; two side plates are connected between the upper and lower cover plates, each side plate has at least one bending part forming the outer contour of the branch channel; wherein the main channel is formed in the upper and lower cover plates and the two side plates connected thereto, and a blocking piece arranged in the bending part forms the branch channel in the bending part.

[0013] In the embodiment, the reverse phase pipe adopts a pipeline split structure, wherein the main channel and the branch channel are respectively processed and formed, and then the branch shell is connected to the opening on the side edge of the main shell; since the main shell and the branch shell are respectively processed and formed, the cross-sectional area of the channel can be controlled, and various types of branch shells can be replaced to obtain different deceleration effects of the airflow in the main channel.

[0014] In a preferred embodiment of the present application, a plurality of branch channels are arranged on the reverse phase pipe, and each branch channel is arranged on one side or opposite sides of the main channel.

[0015] In the embodiment, a plurality of branch channels are arranged on one side or both sides of the main channel, and the airflow in the main channel can be repeatedly decelerated in the process of sequentially passing through the plurality of branch channels, thereby improving the deceleration effect of the airflow in the main channel.

[0016] In a preferred embodiment of the present application, each branch channel arranged on both sides of the main channel is symmetrically arranged.

[0017] In a preferred embodiment of the utility model, each of the branch channels arranged on the two sides of the main channel is arranged in an asymmetric structure, and one of the branch channels on one side of the main channel is arranged at a corresponding position between the two branch channels adjacent to each other on the other side of the main channel.

[0018] In a preferred embodiment of the utility model, the main channel and the two branch channels arranged symmetrically on the two sides of the main channel form a slow-flow unit, and the width of the slow-flow unit and the height of the slow-flow unit are in a ratio of 0.5:1-2:1.

[0019] In a preferred embodiment of the utility model, the number of the slow-flow units on the inverter pipe is greater than or equal to 3.

[0020] In a preferred embodiment of the utility model, the angle between the axis direction of the main channel and the axis direction of the inlet of the branch channel is 40°-70°.

[0021] On the other hand, the utility model also provides a sound box, which comprises a box body and an inverter pipe as described above, wherein the inlet of the main channel is in communication with a chamber in the box body, and the outlet of the main channel is in communication with the outside.

[0022] The sound box has the inverter pipe with the Tesla one-way valve structure arranged thereon, which, on the basis of retaining the original low-frequency extension effect of the inverter pipe, makes the outflowing airflow in the inverter pipe relatively small in speed, and the airflow-induced wind noise is small, so that the occurrence of howling sound can be avoided, and the sound quality is pure. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor. In the drawings:

[0024] The drawings described herein are only for illustrative purposes, and are not intended to limit the scope of the utility model disclosure in any way. In addition, the shape and scale of each component in the drawings are only illustrative, which is used to help understanding of the utility model, and is not a specific limitation on the shape and scale of each component of the utility model. Those skilled in the art can select various possible shapes and scales to implement the utility model according to specific conditions under the guidance of the utility model.

[0025] Figure 1 It is a structural schematic view of the conventional inverter pipe in the prior art;

[0026] Figure 2 Figure 1 is a structural schematic diagram of a sound box in the prior art;

[0027] Figure 3 Figure 2 is a structural schematic diagram of an inverter tube according to the present application;

[0028] Figure 4 Figure 3 is a schematic diagram of gas flow direction in the inverter tube according to the present application;

[0029] Figure 5 Figure 4 is a structural schematic diagram of a sound box according to the present application;

[0030] Figure 6 Figure 5 is a comparison diagram of sound pressure level test results of the inverter tube according to the present application and the inverter tube in the prior art;

[0031] Figure 7 Figure 6 is a comparison diagram of impedance value test results of the inverter tube according to the present application and the inverter tube in the prior art.

[0032] Explanation of reference signs:

[0033] Prior art:

[0034] 10, inverter tube; 20, sound box;

[0035] The present application:

[0036] 30, main passage; 31, branch passage; 32, blocking member;

[0037] 40, sound box; 41, box body; 42, inverter tube. DETAILED DESCRIPTION

[0038] In order to make the personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person of ordinary skill in the art without making creative efforts should belong to the protection scope of the present application.

[0039] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] Implementation Method 1:

[0042] like Figures 3 to 5 As shown, this utility model provides a phase inverter 42, which includes: a main channel 30 for the outflow of gas from the speaker 40; at least one branch channel 31, disposed on at least one side of the main channel 30, the inlet and outlet of the branch channel 31 being connected to the main channel 30 and forming a Tesla one-way valve structure with the main channel 30; wherein, the gas flow direction at the outlet of the branch channel 31 generally exhibits an opposite flow trend to the gas flow direction in the main channel 30, so as to form a vortex at the outlet of the branch channel 31 and slow down the gas flow rate in the main channel 30.

[0043] The phase inverter 42 described in this utility model, such as Figure 6 and Figure 7 As shown, although a gas pipeline structure completely different from the existing phase inverter 10 is adopted, the original low-frequency extension function of the phase inverter 42 is retained.

[0044] Figure 6 The figures show the sound pressure level test results at different frequencies; the x-axis represents frequency (Hz), and the y-axis represents sound pressure level (dB). The traditional SPL is a loudspeaker equipped with a conventional bass reflex port, while the new SPL is a loudspeaker equipped with a Tesla one-way valve. As can be seen from the figures, the acoustic performance of the two is comparable.

[0045] Figure 7 The graph shows the impedance test results at different frequencies, where the x-axis represents frequency (Hz) and the y-axis represents impedance (Ω). Imp (traditional) refers to a loudspeaker equipped with a traditional bass reflex port, while Imp (new) refers to a loudspeaker equipped with a Tesla one-way valve. As can be seen from the graph, the acoustic performance of the two is comparable.

[0046] The phase inverter 42 described in this utility model has a relatively low outflow velocity due to the Tesla one-way valve structure, resulting in low wind noise caused by airflow. There is no need to worry about howling noise, and the sound quality is pure.

[0047] The reverse phase pipe 42, the sound box 40 design can be without the open box design of adopting the design of the rear; the cross section area of the main channel 30 can be selected as required, need not worry that too small leads to the too big airflow flow rate; need not deliberately design the horn mouth at the import and export of the main channel 30 and other increase the die difficulty; in the whole machine stacking, the rest components need not be too far from the import and export of the reverse phase pipe 42, save space, facilitate the whole machine stacking, or the space saved as the box body 41 space, obtain better low-frequency effect.

[0048] As Figure 1 And Figure 2 Shown, it shows the conventional reverse phase pipe 10 structure and the sound box 20 structure with reverse phase pipe 10 in the prior art.

[0049] Specifically, the reverse phase pipe 10 in the prior art is a pipeline with certain cross section area and length, and the conventional reverse phase pipe 10 reduces the gas flow rate by increasing the cross section area of the pipeline; but maintaining the low-frequency extension effect of the reverse phase pipe 10 requires maintaining the ratio of the cross section area and the length of the pipeline within a certain range, that is, increasing the cross section area requires lengthening the pipeline in proportion.

[0050] Further, in addition to the volume of the sound box 20 being sufficient, the conventional reverse phase pipe 10 cannot arbitrarily reduce the gas flow rate by increasing the cross section area due to size limitations, and can only use circular arcs or horn mouth shapes at the import and export of the pipeline as much as possible, which has little effect on the airflow flow rate and only reduces the possibility of airflow forming a howling sound.

[0051] And the novel reverse phase pipe 42 with an internal flow channel structure provided by the application can solve the above problems, and the specific structure of the reverse phase pipe 42 of the utility model will be described below.

[0052] As Figure 3 And Figure 4 Shown, the reverse phase pipe 42 of the utility model forms a main channel 30 and at least one branch channel 31. Among them, the main channel 30 is a channel extending along a straight line, and the airflow in the sound box 40 can flow to the outside through the main channel 30; the branch channel 31 is arranged on one side of the main channel 30, and the branch channel 31 is a bent pipeline, and the inlet and outlet of the branch channel 31 are connected with the main channel 30, along the flow direction of the gas in the main channel 30, the inlet of the branch channel 31 is connected to the upstream of the main channel 30, and the outlet of the branch channel 31 is connected to the downstream of the main channel 30, thereby forming a Tesla one-way valve structure between the main channel 30 and the branch channel 31.

[0053] That is, the phase inversion pipe 42 in the utility model is designed according to the principle of the Tesla check valve structure, the airflow in the phase inversion pipe 42 is divided into two paths, the airflow in the middle path flows forward along the main channel 30, and the airflow on both sides enters the branch channel 31 so as to make the airflow turn, because the directions of the airflow in the middle path and the gas at the outlet of the branch channel 31 are different when the gas at the outlet of the branch channel 31 meets the airflow in the middle path, the gas vortex is formed at the outlet of the branch channel 31, and the airflow speed in the main channel 30 is offset and reduced.

[0054] The Tesla check valve structure is a known check valve structure in the fluid field, therefore, the principle of reducing the gas flow speed in the phase inversion pipe 42 is not further described.

[0055] According to one embodiment of the utility model, as shown in Figure 3 and Figure 5 The phase inversion pipe 42 comprises a main shell, a main channel 30 is formed in the main shell, at least one branch shell is connected to at least one side of the main shell, and a branch channel 31 is formed in the branch shell.

[0056] The phase inversion pipe 42 in the embodiment adopts a pipeline split structure, wherein the main channel 30 and the branch channel 31 are separately processed and formed, and then the branch shell is connected to the opening on the side edge of the main shell, the main shell and the branch shell are separately processed and formed, so that the cross-sectional area of the channel can be controlled, and various types of branch shells can be replaced to obtain different deceleration effects of the airflow in the main channel 30.

[0057] Specifically, the main shell is a long strip-shaped rectangular frame with two openings, a long strip-shaped main channel 30 with a rectangular cross section is formed in the main shell, a plurality of openings are formed on one side or opposite sides of the rectangular frame, and each opening penetrates the side wall of the main shell. The branch shell is a curved rectangular frame with two openings, a curved branch channel 31 with a rectangular cross section is formed in the branch shell, and the two openings of the branch shell are connected to the openings on the side wall of the main shell, so that the main channel 30 and the branch channel 31 are connected.

[0058] The branch shell can be connected to the opening of the main shell by welding, or can be connected by detachable methods such as insertion, adhesion and bolt connection, so that the branch shell on the main shell can be replaced. The defect of the above structure in the embodiment is that a transition fillet structure cannot be formed at the connection position of the main channel 30 and the branch channel 31, which affects the flow of the gas in the main channel 30 to the branch channel 31 and the backflow of the gas in the branch channel 31.

[0059] According to one embodiment of the utility model, as shown in Figure 3 and Figure 5As shown in the drawings, the phase inverter pipe 42 comprises: oppositely arranged upper cover plate and lower cover plate; two side plates connected between the upper cover plate and the lower cover plate, each side plate having at least one bending part forming the outer contour of the branch channel 31; wherein the main channel 30 is formed in the connected upper cover plate, lower cover plate and two side plates, and the blocking piece 32 arranged in the bending part forms the branch channel 31 in the bending part.

[0060] The phase inverter pipe 42 in the embodiment adopts a pipe piece splicing structure, wherein the upper cover plate, the lower cover plate and the two side plates surround to form the main channel 30 and the branch channel 31, and the two side plates are correspondingly bent and formed to form the side wall of the branch channel 31; the above structure is arranged due to the structure form of the pipe piece splicing, so that the molding is relatively simple and convenient for batch processing and manufacturing.

[0061] Specifically, the upper cover plate and the lower cover plate are the same in shape, which are the whole long strip-shaped plates, and the side edges are provided with the sawtooth-like structure; the two side plates can be bent by the flexible long strip-shaped plate or can be processed by the injection molding process, and the side plate has the bending part which can be matched with the sawtooth-shaped structure on the upper cover plate or the lower cover plate.

[0062] As shown in the drawings, Figure 4 The upper cover plate, the side plate, the lower cover plate and the side are sequentially connected end to end to surround to form the main channel 30, and the blocking piece 32 is arranged between the upper cover plate and the lower cover plate, the blocking piece 32 is arranged in the bending part of the side plate, and the branch channel 31 which is communicated with the main channel 30 is formed in the bending part.

[0063] Of course, in other embodiments of the utility model, the phase inverter pipe 42 can also be integrally processed by the injection molding process.

[0064] According to one embodiment of the utility model, as shown in the drawings, Figure 3 and Figure 4 The phase inverter pipe 42 is provided with a plurality of branch channels 31, and each branch channel 31 is arranged on one side or opposite sides of the main channel 30. A plurality of branch channels 31 are arranged on one side or both sides of the main channel 30, and the airflow in the main channel 30 can realize repeated speed reduction in the process of sequentially passing through a plurality of branch channels 31, thereby improving the speed reduction effect of the airflow in the main channel 30.

[0065] According to one embodiment of the utility model, as shown in the drawings, Figure 3 and Figure 4 Each branch channel 31 arranged on both sides of the main channel 30 is symmetrically arranged.

[0066] According to another embodiment of the utility model, each branch channel 31 arranged on both sides of the main channel 30 is arranged in an asymmetric structure, and one branch channel 31 on one side of the main channel 30 is located at the corresponding position between the adjacent two branch channels 31 on the other side of the main channel 30.

[0067] According to another embodiment of the present application, as shown in Figure 4 and Figure 5 The main channel 30 and the two branch channels 31 symmetrically arranged on both sides of the main channel 30 form a slow flow unit, and the ratio of the width L of the slow flow unit to the height H of the slow flow unit is 0.5:1-2:1; preferably, the ratio of the width L of the slow flow unit to the height H of the slow flow unit is 0.8:1-1.2:1. When the ratio of the width L of the slow flow unit to the height H of the slow flow unit is 0.8:1-1.2:1, the scheme can have better low-frequency extension and high-frequency smoothing effects, and the acoustic performance is better than that of the traditional inverse phase pipe.

[0068] Further, the number of the slow flow units on the inverse phase pipe is greater than or equal to 3, and the more the number of the slow flow units, the more obvious the slowing effect of the inverse phase pipe on the airflow.

[0069] According to another embodiment of the present application, as shown in Figure 3 The angle α between the axis direction of the main channel and the inlet axis direction of the branch channel is 40°-70°, and preferably, α is 45°-60°. When 40°≤α<45° or 60<α≤70°, the scheme can achieve similar acoustic effects as the traditional inverse phase pipe; when 45°≤α≤60°, the scheme can have better low-frequency extension and high-frequency smoothing effects, and the acoustic performance is better than that of the traditional inverse phase pipe.

[0070] Embodiment two:

[0071] On the other hand, as shown in Figure 5 The utility model also provides an audio amplifier 40, it includes: cabinet 41;As described in embodiment one inverse phase pipe 42, the inlet of main channel 30 of inverse phase pipe 42 is communicated with the chamber in cabinet 41, and the outlet of main channel 30 is communicated with the outside.

[0072] The audio amplifier 40 has a Tesla check valve structure inside the inverse phase pipe 42 arranged thereon, which, on the basis of retaining the original low-frequency extension effect of the inverse phase pipe 42, makes the airflow velocity in the inverse phase pipe 42 relatively small, the wind noise caused by the airflow is small, and there is no need to worry about the occurrence of howling, and the sound quality is pure.

[0073] The above-described specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above-described specific embodiments are only specific embodiments of the present application and are not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An inverter tube, characterized by, The application relates to a phase inversion pipe. The phase inversion pipe comprises: a main channel (30) for the outflow of gas in a sound box (40); 2. The inverter tube of claim 1, wherein, at least one branch channel (31) arranged on at least one side of the main channel (30), the inlet and outlet of the branch channel (31) being connected with the main channel (30) and forming a Tesla one-way valve structure with the main channel (30), and a vortex being formed at the outlet of the branch channel (31) to slow down the gas flow in the main channel (30). The phase inversion pipe (42) comprises: a main shell in which the main channel (30) is formed; 3. The inverter tube of claim 1, wherein, at least one branch shell connected to at least one side of the main shell, and the branch channel (31) is formed in the branch shell. The phase inversion pipe (42) comprises: oppositely arranged upper and lower cover plates; two side plates connected between the upper and lower cover plates, and each side plate is provided with at least one bending part forming the outer contour of the branch channel (31); 4. The inverter tube according to any one of claims 1 to 3, characterized by wherein the main channel (30) is formed in the connected upper and lower cover plates and the two side plates, and a blocking piece (32) arranged in the bending part forms the branch channel (31) in the bending part.

5. The inverter tube of claim 4, wherein, A plurality of branch channels (31) are arranged on the phase inversion pipe (42), and each branch channel (31) is arranged on one side or opposite sides of the main channel (30).

6. The inverter tube of claim 4, wherein, Each branch channel (31) arranged on opposite sides of the main channel (30) is symmetrically arranged.

7. The inverter tube of claim 5, wherein, Each branch channel (31) arranged on opposite sides of the main channel (30) is arranged in an asymmetric structure, and one branch channel (31) on one side of the main channel (30) is arranged at a corresponding position between two adjacent branch channels (31) on the other side of the main channel (30).

8. The inverter tube of claim 7, wherein, The main channel (30) and the two branch channels (31) symmetrically arranged on two sides of the main channel (30) form a flow slowing unit, and the width of the flow slowing unit and the height of the flow slowing unit are in a ratio of 0.5:1-2:

1.

9. The inverter tube of claim 7, wherein, The width of the flow slowing unit and the height of the flow slowing unit are in a ratio of 0.8:1-1.2:

1.

10. The inverter tube of claim 1, wherein, The number of the flow slowing units on the phase inversion pipe is greater than or equal to 3.

11. The inverter tube of claim 1, wherein, The angle between the axis direction of the main channel (30) and the axis direction of the inlet of the branch channel (31) is 40-70 degrees.

12. A sound box, characterized in that, The angle between the axis direction of the main channel (30) and the axis direction of the inlet of the branch channel (31) is 45-60 degrees. The application relates to a phase inversion pipe. The phase inversion pipe (42) comprises: a box body (41); the inlet of the main channel (30) of the phase inversion pipe (42) is connected with a cavity in the box body (41), and the outlet of the main channel (30) is connected with the outside.

Images