Airflow loop compensation structure of inverter tube and sound box

Abstract

The utility model relates to the technical field of inverter tubes, in particular to an airflow loop compensation structure of an inverter tube and a sound box. The inverter tube is provided with an airflow channel, the airflow channel penetrates through one end of the inverter tube to form an airflow outlet, and the airflow channel penetrates through the other end of the inverter tube to form an airflow inlet; a backflow cover is arranged on the outer side of the inverter tube and provided with a backflow channel, the backflow channel is provided with a backflow inlet and a backflow outlet which are communicated and connected with the airflow channel, and the backflow inlet and the backflow outlet are sequentially arranged at intervals in the output direction of airflow in the airflow channel. Compared with the prior art, the airflow channel and the backflow channel communicated and connected with the airflow channel are arranged; by utilizing the arrangement of the airflow channel, the output capability of low audio frequency is enhanced; meanwhile, secondary compensation is carried out on the air flow in the air flow channel by means of the flow-back channel, so that the output capacity of middle audio and high audio is enhanced, and the tone quality effect of the full frequency band is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of inverted tubes, in particular to an airflow loop compensation structure of an inverted tube and a sound box. Background Art

[0002] The bass reflex tube, also called the reflex tube or guide tube, is often used in acoustic equipment such as speakers. The bass reflex speaker exposes the speaker diaphragm to the outside to produce sound, and the air behind the speaker will also vibrate. At this time, the bass reflex tube is installed behind the speaker. The bass reflex tube can also utilize the vibration of the speaker to the rear, which will strengthen the sound waves and ultimately improve the bass effect of the speaker.

[0003] For example, Chinese invention CN1547417A discloses a method for extending the low-frequency lower limit of a guided speaker, which increases the length of the guide tube on the speaker and adjusts the resonance point of the speaker and the guide tube to correspond to the low-frequency boost point of TUBASS or other heavy bass technology, thereby reducing the low-frequency sound pressure drop and lowering the low-frequency lower limit of the flat response, thereby achieving a better bass restoration effect. However, the inventor discovered in the actual research and development process that although the installation of the above-mentioned type of inverted tube in the speaker can enhance the bass output capability of the speaker to a certain extent, the setting of the inverted tube will simultaneously weaken the output capability of the mid-frequency and high-frequency audio, making the full-band output capability of the speaker worse, which seriously affects the full-band sound quality of the speaker.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide an airflow loop compensation structure for a bass reflex tube, which effectively solves the technical defect in the prior art that the speaker provided with a bass reflex tube enhances the low-frequency output capability while reducing the output capability of the mid-frequency and high-frequency frequencies, thereby improving the full-band output capability of the speaker and improving the full-band sound quality effect of the speaker.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an airflow loop compensation structure of an inverted tube, comprising an inverted tube, the inverted tube is provided with an airflow channel, the airflow channel penetrates one end of the inverted tube to form an airflow outlet, and the airflow channel penetrates the other end of the inverted tube to form an airflow inlet; a return cover is provided on the outside of the inverted tube, the return cover is provided with a return channel, the return channel is provided with a return inlet and a return outlet which are connected to the airflow channel, and the return inlet and the return outlet are sequentially arranged at intervals along the output direction of the airflow in the airflow channel.

[0007] The beneficial effects of the airflow loop compensation structure of the bass reflex tube provided in the present application are: compared with the prior art, by setting an airflow channel and a return channel connected to the airflow channel; utilizing the setting of the airflow channel, the output capacity of the low frequency is enhanced; at the same time, with the help of the return channel, the airflow in the airflow channel is compensated for a second time, so as to enhance the output capacity of the mid-frequency and high-frequency, so as to enhance the sound quality effect of the full frequency band.

[0008] As a preferred solution: the inverted tube is a straight tube structure, the air flow channel penetrates the rear surface of the inverted tube to form an air flow inlet, the air flow channel penetrates the front surface of the inverted tube to form an air flow outlet, and the air flow inlet, air flow channel and air flow outlet are coaxially arranged.

[0009] As a preferred solution: the inverted tube is a circular straight tube structure, the diameters of the airflow outlet and the airflow inlet are the same, and the diameter of the airflow channel is larger than the diameters of the airflow inlet and the airflow outlet.

[0010] As a preferred solution: the reflux hood includes

[0011] a first horizontal cover portion;

[0012] A first vertical cover portion, one end of which is integrally formed at the front end of the first horizontal cover portion, and the other end of which is connected to the outer side surface of the inverted tube;

[0013] A second vertical cover portion, one end of which is integrally formed at the rear end of the first horizontal cover portion, and the other end of which is connected to the outer side surface of the inverted tube;

[0014] The first vertical cover body is arranged in parallel with the second vertical cover body, the first horizontal cover body is arranged in parallel with the outer side of the inverted tube, and the first horizontal cover body, the first vertical cover body, the second vertical cover body and the outer side of the inverted tube form a reflux channel.

[0015] As a preferred solution: the inverted tube is provided with a first opening running through its inner and outer surfaces, and the first opening is used to conduct and connect the air flow channel and the reflux channel; a first partition is provided at the first opening, and the front side surface of the first partition is spaced apart from the front side surface of the first opening to form a reflux outlet, and the rear side surface of the first partition is spaced apart from the rear side surface of the first opening to form a reflux inlet.

[0016] As a preferred solution: the first vertical cover body and the return outlet are arranged at a front-to-back spacing to form a first airflow detour gap on the front side of the return channel; the return inlet and the second vertical cover body are arranged at a front-to-back spacing to form a second airflow detour gap on the rear side of the return channel.

[0017] As a preferred solution: the first airflow detour gap and the second airflow detour gap have the same size, and the reflux inlet and the reflux outlet have the same size.

[0018] As a preferred solution: the inner side surface of the first partition is flush with the inner side surface of the inverted tube, the outer side surface of the first partition is flush with the outer side surface of the inverted tube, and at least the inner side surface of the first horizontal cover body is flush with the outer side surface of the first partition.

[0019] As a preferred solution: the width of the airflow channel in the up-down direction is defined as the first width, the width of the return channel in the up-down direction is defined as the second width, and the second width is one third of the first width.

[0020] The present application also provides a speaker, equipped with an airflow loop compensation structure of a phase reversal tube. Compared with the prior art, the speaker equipped with an airflow loop compensation structure of a phase reversal tube can enhance the output capacity of low frequencies while compensating the output capacity of mid-range and high frequencies, effectively solving the unstable frequency response fluctuation capacity of the mid-high frequency speaker box and enhancing the hierarchical expression of mid-high frequencies, making the human voice clearer and more restored, thereby improving the sound quality effect of the speaker in the full frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0022] Figure 1 is a cross-sectional view of an airflow loop compensation structure of a bass reflex tube provided in an embodiment of the present application installed in a sound box;

[0023] Figure 2 yes Figure 1 The specific structural diagram of the airflow loop compensation structure of the inverter tube shown;

[0024] Figure 3 yes Figure 2 A partial enlarged view of the airflow loop compensation structure of the inverter tube shown in FIG.

[0025] Figure 4 This is a sound quality test analysis diagram of the airflow loop compensation structure of the inverted tube provided in the embodiment of the present application;

[0026] Figure 5 This is a sound quality test analysis diagram of the airflow loop compensation structure of the bass reflex tube provided in the embodiment of the present application.

[0027] Among them, the reference numerals in the figure are:

[0028] 10. Inverted phase tube; 11. Air flow channel; 12. Air flow outlet; 13. Air flow inlet; 14. Backflow cover; 141. First horizontal cover body; 142. First vertical cover body; 143. Second vertical cover body; 15. Backflow channel; 151. Backflow inlet; 152. Backflow outlet; 153. First air flow detour notch; 154. Second air flow detour notch; 16. First opening; 161. First baffle; 20. Sound box; 21. First chamber; 22. First mounting hole; 23. Second mounting hole; 24. Speaker;

[0029] w1, first width; w2, second width. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0032] 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 drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Please also read Figures 1 to 3Now, the airflow loop compensation structure of the phase-inverting tube 10 provided in the embodiment of the present application is described. The airflow loop compensation structure of the phase-inverting tube 10 includes: the phase-inverting tube 10 and the return cover 14.

[0036] The inverted tube 10 is provided with an air flow channel 11, which passes through one end of the inverted tube 10 to form an air flow outlet 12, and passes through the other end of the inverted tube 10 to form an air flow inlet 13; the return cover 14 is arranged on the outside of the inverted tube 10, and the return cover 14 is provided with a return channel 15, and the return channel 15 is provided with a return inlet 151 and a return outlet 152 which are connected to the air flow channel 11, and the return inlet 151 and the return outlet 152 are arranged in sequence along the output direction of the air flow in the air flow channel 11.

[0037] Specifically, when the speaker 20 with the airflow loop compensation structure of the inverted tube 10 is installed; when the speaker vibrates backward, a compression wave will be formed inside the speaker 20, and when it vibrates forward, a rarefaction wave will be formed. After these sound waves enter the airflow channel 11, due to their different propagation paths, they will be aligned or inverted in phase with the sound waves in front at the airflow outlet 12. When the sound waves emitted in front of the speaker 20 and the sound waves emitted by the inverted tube 10 are the same in frequency and opposite in phase, they are superimposed in the air and can enhance each other, thereby increasing the low-frequency sound pressure level and making the bass deeper and more powerful. At the same time, by setting a return channel 15 connected to the airflow channel 11, the airflow in the airflow channel 11 is compensated twice to enhance the output capacity of the mid-frequency and high-frequency, so as to enhance the sound quality effect of the full frequency band.

[0038] In some embodiments of the present application, the inverted tube 10 is a straight tube structure, the air flow channel 11 penetrates the rear surface of the inverted tube 10 to form an air flow inlet 13, the air flow channel 11 penetrates the front surface of the inverted tube 10 to form an air flow outlet 12, and the air flow inlet 13, the air flow channel 11 and the air flow outlet 12 are coaxially arranged.

[0039] Preferably, the inverted tube 10 is a circular straight tube structure, the diameters of the airflow outlet 12 and the airflow inlet 13 are the same, and the diameter of the airflow channel 11 is larger than the diameters of the airflow inlet 13 and the airflow outlet 12 .

[0040] In other embodiments of the present application, the return cover 14 includes a first horizontal cover body portion 141, a first vertical cover body portion 142 and a second vertical cover body portion 143, one end of the first vertical cover body portion 142 is integrally formed at the front end of the first horizontal cover body portion 141, and the other end is connected to the outer side surface of the inverter tube 10; one end of the second vertical cover body portion 143 is integrally formed at the rear end of the first horizontal cover body portion 141, and the other end is connected to the outer side surface of the inverter tube 10; the first vertical cover body portion 142 and the second vertical cover body portion 143 are arranged in parallel, and the first horizontal cover body portion 141 is arranged in parallel with the outer side surface of the inverter tube 10, and the return channel 15 is enclosed by the first horizontal cover body portion 141, the first vertical cover body portion 142, the second vertical cover body portion 143 and the outer side surface of the inverter tube 10.

[0041] Preferably, the first vertical cover portion 142 and the second vertical cover portion 143 are respectively formed integrally with the outer side surface of the inverted tube 10 to reduce the generation of assembly gaps and make the inverted tube 10 more controllable when conducting sound wave guidance.

[0042] Specifically, the inverted tube 10 is provided with a first opening 16 that runs through its inner and outer surfaces, and the first opening 16 is used to conduct and connect the air flow channel 11 and the reflux channel 15; a first partition plate 161 is provided at the first opening 16, and the front side surface of the first partition plate 161 is spaced apart from the front side surface of the first opening 16 to form a reflux outlet 152, and the rear side surface of the first partition plate 161 is spaced apart from the rear side surface of the first opening 16 to form a reflux inlet 151.

[0043] The first vertical cover portion 142 and the return outlet 152 are arranged at a front-to-back spacing to form a first airflow detour notch 153 at the front side of the return channel 15; the return inlet 151 and the second vertical cover portion 143 are arranged at a front-to-back spacing to form a second airflow detour notch 154 at the rear side of the return channel 15. The first airflow detour notch 153 and the second airflow detour notch 154 are of the same size, and the return inlet 151 and the return outlet 152 are of the same size. Such a structure can enhance the compensation capability of mid-range and high-range frequencies.

[0044] In more detail, the inner side surface of the first partition 161 is flush with the inner side surface of the inverter tube 10 , the outer side surface of the first partition 161 is flush with the outer side surface of the inverter tube 10 , and at least the inner side surface of the first horizontal cover body 141 is flush with the outer side surface of the first partition 161 .

[0045] In some other embodiments of the present application, the width of the airflow channel 11 in the vertical direction is the first width w1, and the width of the return channel 15 in the vertical direction is the second width w2, and the second width w2 is one third of the first width w1. By setting the airflow channels 11 and the return channels 15 of different sizes, the output capacity of the mid-range and high-range frequencies is compensated while the low-frequency output capacity is enhanced, and the unstable frequency response fluctuation capacity of the mid-range and high-range speaker cabinet is effectively solved and the mid-range and high-range layer expression is enhanced, so that the human voice is clearer and the restoration degree is higher.

[0046] In other embodiments of the present application, a speaker 20 is further provided. The speaker 20 is provided with a first chamber 21. The speaker 20 is provided with a first mounting hole 22 and a second mounting hole 23 that penetrate through the front and rear surfaces thereof and connect to the first chamber 21. The first mounting hole 22 is used for mounting a speaker 24, and the second mounting hole 23 is used for mounting an airflow loop compensation structure of the bass reflex tube 10.

[0047] When the speaker 20 is working, the speaker generates sound waves inside the first chamber 21, and the sound waves enter the air flow channel 11 from the air flow inlet 13, and the air flow channel 11 is used to enhance the low frequency. At the same time, the sound waves enter the return channel 15 for secondary compensation to enhance the output capacity of the mid-frequency and high-frequency. It effectively solves the unstable frequency response fluctuation of the mid-high frequency speaker cabinet and enhances the level expression of the mid-high frequency, making the human voice clearer and more restored, thereby improving the sound quality effect of the full-band of the speaker 20.

[0048] Please also read Figures 4 to 5 , providing a speaker 20 equipped with an airflow loop compensation structure equipped with a bass reflex tube 10, using a Soundcheck electroacoustic test system; in a test environment anechoic chamber, testing is performed under test conditions of 1 meter 100mv and 1 meter 1V.

[0049] Among them, the red curve is the curve of the unmodified speaker 20, and the blue line is the comparison of the curve of the modified speaker 20. The data between the two show technical differences. After comparison and evaluation by professional electroacoustic engineers on the actual sound listening experience, the result is that the sound quality of the modified speaker 20 is significantly better than that of the unmodified speaker 20, especially in the 1KHZ-7KHZ mid-frequency band and high-frequency band.

[0050] It can be seen that only by setting up the reflux channel 15, the mid-high frequency response width can be effectively increased within the area of ​​1KHZ-7KHZ for sound compensation, solving the unstable frequency response fluctuation of the mid-high frequency speaker cabinet and enhancing the mid-high frequency layer expression, making the human voice clearer and more restored.

[0051] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An airflow loop compensation structure of an inverted tube, comprising an inverted tube (10), wherein the inverted tube (10) is provided with an airflow channel (11), wherein the airflow channel (11) penetrates one end of the inverted tube (10) to form an airflow outlet (12), and the airflow channel (11) penetrates the other end of the inverted tube (10) to form an airflow inlet (13); Features: A return cover (14) is provided on the outside of the inverted tube (10), the return cover (14) is provided with a return channel (15), the return channel (15) is provided with a return inlet (151) and a return outlet (152) which are connected to the airflow channel (11), and the return inlet (151) and the return outlet (152) are arranged in sequence at intervals along the output direction of the airflow in the airflow channel (11).

2. The airflow loop compensation structure of the inverter tube according to claim 1, characterized in that: The inverted tube (10) is a straight tube structure, the airflow channel (11) penetrates the rear surface of the inverted tube to form an airflow inlet (13), the airflow channel (11) penetrates the front surface of the inverted tube (10) to form an airflow outlet (12), and the airflow inlet (13), the airflow channel (11) and the airflow outlet (12) are coaxially arranged.

3. The airflow loop compensation structure of the inverter tube according to claim 1 or 2, characterized in that: The inverted tube (10) is a circular straight tube structure, the diameters of the airflow outlet (12) and the airflow inlet (13) are the same, and the diameter of the airflow channel (11) is larger than the diameters of the airflow inlet (13) and the airflow outlet (12).

4. The airflow loop compensation structure of the inverter tube according to claim 3, characterized in that: The return hood (14) comprises A first horizontal cover portion (141); A first vertical cover body (142), one end of which is integrally formed at the front end of the first horizontal cover body (141), and the other end of which is connected to the outer side surface of the inverted tube (10); A second vertical cover portion (143), one end of which is integrally formed at the rear end of the first horizontal cover portion (141), and the other end of which is connected to the outer side surface of the inverted tube (10); The first vertical cover body portion (142) is arranged in parallel with the second vertical cover body portion (143), the first horizontal cover body portion (141) is arranged in parallel with the outer side surface of the inverter tube (10), and the return channel (15) is surrounded by the first horizontal cover body portion (141), the first vertical cover body portion (142), the second vertical cover body portion (143) and the outer side surface of the inverter tube (10).

5. The airflow loop compensation structure of the inverter tube according to claim 4, characterized in that: The inverted tube (10) is provided with a first opening (16) penetrating the inner and outer surfaces thereof, and the first opening (16) is used to conduct and connect the air flow channel (11) and the return flow channel (15); A first partition (161) is provided at the first opening (16), and a front side surface of the first partition (161) is spaced apart from a front side surface of the first opening (16) to form a reflux outlet (152), and a rear side surface of the first partition (161) is spaced apart from a rear side surface of the first opening (16) to form a reflux inlet (151).

6. The airflow loop compensation structure of the inverter tube according to claim 5, characterized in that: The first vertical cover portion (142) and the return outlet (152) are arranged at a front-to-rear spacing to form a first airflow detour notch (153) at the front side of the return channel (15); The return inlet (151) and the second vertical cover portion (143) are arranged at a front-to-rear spacing to form a second airflow detour gap (154) at the rear side of the return channel (15).

7. The airflow loop compensation structure of the inverter tube according to claim 6, characterized in that: The first airflow detour notch (153) and the second airflow detour notch (154) are of the same size, and the reflux inlet (151) and the reflux outlet (152) are of the same size.

8. The airflow loop compensation structure of the inverter tube according to any one of claims 5 to 7, characterized in that: The inner side surface of the first partition plate (161) is arranged flush with the inner side surface of the inverter tube (10), the outer side surface of the first partition plate (161) is arranged flush with the outer side surface of the inverter tube (10), and at least the inner side surface of the first horizontal cover body (141) is arranged flush with the outer side surface of the first partition plate (161).

9. The airflow loop compensation structure of the inverter tube according to claim 1, characterized in that: The width of the airflow channel (11) in the up-down direction is defined as a first width (w1), and the width of the return channel (15) in the up-down direction is defined as a second width (w2), and the second width (w2) is one third of the first width (w1).

10. A sound box, characterized in that: An airflow loop compensation structure equipped with a phase-inverting tube as claimed in any one of claims 1 to 9.

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