CN205195944U - Phase reversal tube and phase reversal type sound box - Google Patents

Abstract

The utility model relates to an audio amplifier field specifically discloses a paraphase pipe and phase reversal formula audio amplifier, the utility model provides a paraphase pipe includes the face-piece of spiral shape apron and audio amplifier, the apron has a top and an end, the apron includes panel and lateral wall, the panel with the lateral wall combination forms a helical groove, the panel passes through the lateral wall with the lateral surface fixed connection of face-piece, helical groove with the face-piece combination forms spiral shape passageway, the face-piece corresponds the position of the initiating terminal of apron is equipped with the opening. The phase reversal pipe provided by the utility model can increase air damping and low frequency time delay by forming a spiral channel, so that the radiation effect of low frequency sound waves is superposed and enhanced; the size and the length of the inverter tube are reduced, and the inverter tube is suitable for a sound box with small volume; the air flow speed can be reduced, and the noise caused by overlarge air flow speed is avoided.

Description

An inverted tube and an inverted speaker

【Technical field】

The utility model relates to the field of sound boxes, in particular to an inverter tube.

【Background technique】

During the use of the inverted speaker, the anti-phase sound wave radiated from the paper cone to the box, after passing through the box body, and then radiated outward through the inverted tube, the low-frequency sound wave is the same as the paper cone radiated to the outside of the box. The frequency sound waves are close in phase and superimposed in the same direction, thereby strengthening the radiation of low frequency sound waves.

The shape and length of the inverter tube have a great influence on the low-frequency sound waves, which are prone to problems such as too heavy bass or slow speed, too loud airflow, and turbid sound.

【Content of utility model】

The utility model aims to provide a phase-inverted tube and a phase-inverted sound box, and the technical scheme is as follows:

On the one hand, the utility model provides an inverter tube, which includes a spiral cover plate and the shell of the sound box, the cover plate has a starting end and an ending end,

The cover plate includes a panel and a side wall, the panel and the side wall are combined to form a spiral groove, the panel is fixedly connected to the outer surface of the face shell through the side wall, and the spiral groove The groove is combined with the face shell to form a helical channel,

The position of the face shell corresponding to the starting end of the cover plate is provided with an opening, the opening and the cover plate form the air inlet of the channel, and the outer surface of the face shell and the end end of the cover plate form The air outlet of the channel.

In some embodiments, the cross-section of the spiral groove formed by the cover plate is a rectangle or a shape similar to a rectangle.

In some embodiments, the panel is integral with the side wall, and the draft angle of the side wall is in the range of 0-3 degrees.

In some embodiments, the connection between the panel and the side wall is provided with a rounded corner, and the radius of the rounded corner is in the range of 2-6 mm.

In some embodiments, each bending portion of the inverter tube is a smooth transition.

In some embodiments, the fixed connection is welding.

In some embodiments, the welding is ultrasonic welding.

In some embodiments, the air inlet and/or the air outlet are bell-shaped.

On the other hand, the utility model provides a phase-inverted sound box, which includes a sound box body and a loudspeaker fixed on the box body, and the phase-inverted sound box also includes a Inverted tube.

The beneficial effect of the specific embodiment of the utility model is that the inverter tube provided by the utility model can increase air damping and low-frequency delay by forming a spiral channel, so that the radiation effect of low-frequency sound waves is superimposed and enhanced; The size and length of the phase tube are suitable for small-volume speakers; it can also reduce the airflow velocity to avoid noise caused by excessive flow velocity.

【Description of drawings】

Fig. 1 is a schematic diagram of a disassembled structure of an inverter tube provided by an embodiment of the present invention.

Fig. 2 is a schematic diagram of the combined structure of the inverter tube provided by an embodiment of the present invention.

Fig. 3 is a schematic rear view of the combined structure of the inverter tube provided by an embodiment of the present invention.

Reference signs: 1, cover plate; 2, face shell; 3, air inlet; 4, air outlet; 11, starting end; 12, ending end; 13, panel; 14, side wall; 21, opening.

【detailed description】

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

Referring to Fig. 1-Fig. 3, the inverter tube provided by the present embodiment includes a spiral cover plate 1 with a starting end 11 and an ending end 12 and the face shell 2 of the sound box, and the cover plate 1 also includes a panel 13 and a side The wall 14 , the panel 13 and the side wall 14 are combined to form a spiral groove, the panel 13 is fixedly connected to the outer surface of the sound box shell 2 through the side wall 14 , and the spiral groove and the shell 2 form a spiral channel. The face shell 2 is provided with an opening 21 at the position corresponding to the starting end 11 of the cover plate 1, the opening 21 and the cover plate 1 form the air inlet 3 of the channel, and the outer surface of the face shell 2 and the end end 12 of the cover plate 1 form the air outlet of the channel 4.

In this embodiment, when the sound box is working, the sound wave radiated to the inside of the face shell 2 enters the spiral channel of the inverter tube from the air inlet 3, and then radiates to the outside of the face shell 2 by the air outlet 4, and the sound wave is connected with the face shell 2. The outer sound waves of the same frequency or similar frequencies are superimposed and radiated forward together, which enhances the sound wave radiation effect in this frequency range. The cover plate 1 can be in the shape of a parrot spiral, and the design of the spiral inverted tube reduces the size and length of the inverted tube, which is suitable for small-volume speakers, and can also reduce the airflow velocity to avoid noise caused by excessive flow velocity.

Further, the cross section of the spiral groove formed by the cover plate 1 is a rectangle or a shape similar to a rectangle. Preferably, the panel 13 is integrated with the side wall 14, and the draft angle of the side wall 14 ranges from 0 to 3 degrees. Specifically, the draft angle of the side wall 14 may be 0.5 degrees, 1 degree, 1.5 degrees, 2 degrees or 2.5 degrees, etc. In this embodiment, the cover plate 1 can be prepared by plastic injection molding, and the setting of the draft angle can make the cover plate easier to separate from the mold; when the cover plate 1 is fixedly connected to the outer surface of the face shell 2, The draft angle can also play a good positioning role.

Preferably, the connection between the panel 13 and the side wall 14 is provided with rounded corners, and the radius range of the rounded corners is 2-6 mm. The radius of the rounded corners can be 3mm, 4mm or 5mm etc. In this embodiment, the cover plate 1 can be prepared by plastic injection molding, and the setting of the rounded corners can make the cover plate 1 easier to detach from the mold, and is conducive to the preparation of the cover plate 1, improving the strength of the cover plate 1; The rounded corners inside the cover plate 1 can also make the gas circulation in the cover plate 1 smoother, increase air damping and low-frequency delay without affecting the sound quality, and further superimpose and enhance the radiation effect of low-frequency sound waves.

Preferably, each bent portion of the inverter tube is a smooth transition. The smooth pipe can make the gas circulation in the square tubular cover plate more smooth, increase air damping and low-frequency delay without affecting the sound quality, and further superimpose and enhance the radiation effect of low-frequency sound waves.

Preferably, the fixed connection between the cover plate 1 and the face shell 2 is welding. In this embodiment, ultrasonic welding can be selected. The welding place of the ultrasonic welding is smooth and beautiful, which can make the cover plate 1 and the panel 2 form a perfect pipeline without affecting the circulation of the internal air flow.

Preferably, the air inlet 3 and/or the air outlet 4 are bell-shaped. The trumpet-shaped air inlet 3 and/or air outlet 4 can further slow down the flow velocity of the airflow inside the duct, avoid excessive flow velocity to generate noise, and also play a role in delaying low-frequency sound waves.

The inverter tube provided by the utility model can increase air damping and low-frequency delay by forming a spiral pipe, so that the radiation effect of low-frequency sound waves is superimposed and enhanced; the size and length of the inverter tube are reduced, and it is suitable for small-volume applications. Speaker; it can also reduce the airflow velocity to avoid noise caused by excessive flow velocity.

Example 2

This embodiment provides a phase-inverting sound box, including a sound box body, a speaker, and the phase-inversion tube provided by the utility model, and the speaker and the phase-inversion tube are fixed on the box body.

The structure of the inverter tube provided in this embodiment is the same as that of the embodiment 1, and will not be repeated here.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. a kind of inverted tube is characterized in that, comprises the face shell of spiral cover plate and sound box, and described cover plate has a start end and an end end, The cover plate includes a panel and a side wall, the panel and the side wall are combined to form a spiral groove, the panel is fixedly connected to the outer surface of the face shell through the side wall, and the spiral groove The groove is combined with the face shell to form a helical channel, The position of the face shell corresponding to the starting end of the cover plate is provided with an opening, the opening and the cover plate form the air inlet of the channel, and the outer surface of the face shell and the end end of the cover plate form The air outlet of the channel. 2 . The inverter tube according to claim 1 , wherein the cross section of the spiral groove formed by the cover plate is rectangular. 3 . The inverter tube according to claim 2 , wherein the panel is integrated with the side wall, and the draft angle of the side wall ranges from 0 to 3 degrees. 4 . 4 . The inverter tube according to claim 2 , wherein a rounded corner is provided at the joint between the panel and the side wall, and the radius of the rounded corner is in the range of 2-6 mm. 5. The inverter tube according to claim 1, characterized in that, each bending portion of the inverter tube is a smooth transition. 6. The inverter tube according to claim 1, wherein the fixed connection is welding. 7. The inverter tube according to claim 6, wherein the welding is ultrasonic welding. 8. The inverter tube according to claim 1, characterized in that, the air inlet and/or the air outlet are bell-shaped. 9. A phase-inverted sound box, comprising a sound box body, a loudspeaker fixed on the box body, characterized in that, the phase-inverted sound box also includes a loudspeaker fixed on the box body as claimed in any of claims 1-8. One said phase-inverting tube.