Sound box

Abstract

The embodiment of the invention discloses a sound box, which is characterized in that a space between an outer shell and an inner shell of a box body is arranged to be at least one part of an inverter tube, the structure of the box body is fully utilized, the inverter tube can be allowed to have a longer length under the condition that the volume of the box body is smaller, the design space of the length of the inverter tube is increased, and the design cost is reduced. The sound box has a better low-frequency effect; and meanwhile, the inverter tube can be hidden in the box body, so that adverse effects on the appearance of the sound box can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of audio equipment, and more specifically, to a sound box. Background Art

[0002] With the development of the times, consumers' demand for some speaker products has gradually developed in the direction of miniaturization. In order to improve the low-frequency performance of the speaker with limited volume, it is usually necessary to install a reflex tube on the speaker. The reflex tube also utilizes the air vibration behind the speaker, radiates the sound waves outside the speaker, and superimposes with the sound waves emitted forward by the speaker, thereby enhancing the low-frequency effect of the sound. However, due to the small size of the speaker and the small space inside the box, the reflex tube is generally set in a straight tube shape and the length and diameter are limited, which ultimately cannot improve the low-frequency performance of the product. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a speaker, which is beneficial to improving the low-frequency effect of the speaker.

[0004] An embodiment of the present invention provides a sound box, comprising a box body and a speaker; the box body comprises an outer shell and an inner shell, the outer shell cover is arranged outside the inner shell, the box body has a cavity and a bass reflex tube, the space between the outer surface of the inner shell and the inner surface of the outer shell forms at least a part of the bass reflex tube, the bass reflex tube has an inner port and an outer port, the inner port is connected to the cavity, the outer shell also has a first sound outlet, and the outer port is connected to the first sound outlet; the speaker is arranged in the box body, the rear end of the speaker is arranged in the cavity, and the front end of the speaker is away from the cavity to radiate sound waves to the outside of the box body.

[0005] Optionally, the speaker is arranged in the inner shell, and there is a gap between the front end of the speaker and the outer shell, the gap is connected to the first sound outlet hole, and the front end of the speaker radiates sound waves to the outside of the sound box through the first sound outlet hole.

[0006] Optionally, the inverter tube includes a common channel and at least two branch channels, the inner port is arranged in the common channel, at least two branch channels extend from one end of the common channel away from the inner port in different directions, and each branch channel has one outer port.

[0007] Optionally, the inverted tube includes two branch channels, and the external ports of the two branch channels are respectively arranged on both sides of the speaker.

[0008] Optionally, the inverted tube has an extension tube, the extension tube extends from the inner wall of the inner shell into the cavity, the common channel extends along the axis of the extension tube and passes through the extension tube, and the inner port is provided on the extension tube.

[0009] Optionally, the inner port is formed in a trumpet shape, and the cross-sectional area of ​​the inner port gradually increases in the extension direction of the inverted tube and in the direction away from the outer port.

[0010] Optionally, the inner wall of the inverted tube is a smooth surface.

[0011] Optionally, the outer shell further has a second sound outlet hole, the speaker is arranged in the inner shell, and there is a gap between the front end of the speaker and the outer shell, and the gap is connected to both the second sound outlet hole and the first sound outlet hole.

[0012] Optionally, the housing further has a second sound outlet hole, the second sound outlet hole corresponds to the position of the speaker, and the front end of the speaker radiates sound waves to the outside of the sound box through the second sound outlet hole.

[0013] An embodiment of the present invention provides a speaker. By setting the space between the outer shell and the inner shell of the box as at least a part of the bass reflex tube, the structure of the box itself is fully utilized. The bass reflex tube can be allowed to have a longer length when the volume of the box is small, thereby increasing the design space for the length of the bass reflex tube, which is conducive to making the speaker have a better low-frequency effect. At the same time, the bass reflex tube can be hidden in the box, and will not have an adverse effect on the appearance of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0015] Figure 1 is a schematic structural diagram of a speaker according to an embodiment of the present invention;

[0016] Figure 2 is a structural schematic diagram of a speaker according to another embodiment of the present invention;

[0017] Figure 3 is a structural schematic diagram of a speaker according to another embodiment of the present invention;

[0018] Figure 4 It is a structural schematic diagram of a speaker according to another embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1-box; 11-cavity; 12-inverter; 121-common channel; 122-branch channel; 123-inner port; 124-outer port; 125-extension tube; 13-outer shell; 131-first sound outlet; 132-second sound outlet; 14-inner shell; 2-speaker. DETAILED DESCRIPTION

[0021] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0022] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0023] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0024] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0025] Figure 1-Figure 4 Schematic diagram of the structure of the speaker of several embodiments of the present invention. Figure 1-Figure 4 The sound box of the embodiment of the present invention comprises a box body 1 and a speaker 2, wherein the speaker 2 is arranged in the box body 1. The box body 1 has a cavity 11, wherein the rear end of the speaker 2 is arranged in the cavity 11, and the front end of the speaker 2 is away from the cavity 11 to radiate sound waves to the outside of the box body 1. The box body 1 also has a reflex tube 12, and the box body 1 comprises an outer shell 13, wherein the outer shell 13 also has a first sound outlet hole 131 penetrating the inner surface and the outer surface of the outer shell 13, and the reflex tube 12 has an inner port 123 and an outer port 124. Among them, the outer port 124 is connected with the first sound outlet hole 131, thereby being connected with the outside of the box body 1; the inner port 123 is connected with the cavity 11, and when the speaker 2 vibrates and makes a sound, the sound waves generated by the air at the rear end of the speaker 2 being pushed enter the reflex tube 12 through the inner port 123 of the reflex tube 12, and propagate to the outside of the sound box through the outer port 124 and the first sound outlet hole 131. The sound waves propagating outwards through the inverted tube 12 are superimposed on the sound waves emitted from the front end of the speaker 2, which can enhance the low frequency effect.

[0026] In the embodiment of the present invention, the bass reflex tube 12 at least partially extends along the inner surface of the outer shell 13. Compared with the traditional straight-cylindrical bass reflex tube, the bass reflex tube 12 of the present embodiment can allow the bass reflex tube 12 to have a longer length when the volume of the box body 1 is small by adopting a method of extending at least partially along the inner surface of the outer shell 13, thereby increasing the design space for the length of the bass reflex tube 12, which is conducive to making the speaker have a better low-frequency effect. At the same time, this design reduces the occupation of the volume of the cavity 11 while ensuring the low-frequency effect of the speaker, and is more convenient for the installation and arrangement of the speaker 2 and other components in the speaker. In addition, this design method is not easy to limit the design of the appearance of the speaker. If a straight-cylindrical bass reflex tube is used, it will protrude from the outer shell 13 when the length of the bass reflex tube is long; while the technical solution of the embodiment of the present invention does not need to make the bass reflex tube 12 have a structure protruding outside the outer shell 13 when a larger length of the bass reflex tube 12 is obtained, making the speaker more beautiful. The shape of the box body 1 can be a cylinder, a sphere, a cuboid or any other shape. Figure 1-Figure 4 The shape shown in the figure is only an example, and the embodiment of the present invention does not limit the appearance shape of the box body 1.

[0027] In a feasible implementation, a hollow channel may be formed in the wall of the housing 13 . For example, the housing 13 having the channel may be directly formed by injection molding, thereby forming at least a portion of the inverter tube 12 .

[0028] In a possible implementation, Figure 1-Figure 4 As shown, the box body 1 also includes an inner shell 14, the cavity 11 is arranged in the inner shell 14, and the outer shell 13 is covered outside the inner shell 14 and fixed relative to the inner shell, so that there is a certain space between the outer surface of the inner shell 14 and the inner surface of the outer shell 13. In this embodiment, the space defined between the outer surface of the inner shell 14 and the inner surface of the outer shell 13 forms at least a part of the inverted tube 12. In other words, at least a part of the inverted tube 12 is formed by the space between the outer shell 13 and the inner shell 14, which makes full use of the structure of the outer shell 13 and the inner shell 14 itself, which is conducive to reducing the volume of the speaker. The two-layer shell structure of the inner shell 14 and the outer shell 13 is also more conducive to protecting the electronic devices inside the speaker, and at the same time, there is more design space for the appearance of the speaker.

[0029] In some embodiments, reference Figure 2 and Figure 3The speaker 2 is disposed in the inner shell 14, and there is a gap between the front end of the speaker 2 and the outer shell 13. The gap is connected to the first sound outlet 131, and the sound waves emitted from the front end of the speaker 2 can propagate from the gap to the outside of the sound box through the first sound outlet 131, that is, the sound waves generated by the front end of the speaker 2 and the sound waves transmitted from the inverted tube 12 propagate to the outside of the sound box through the first sound outlet 131. Optionally, a dustproof net can be provided at the first sound outlet 131 to prevent dust from entering.

[0030] In other embodiments, reference Figure 1 and Figure 4 The housing 13 may also have a second sound outlet 132. In a feasible implementation, as Figure 4 As shown, the speaker 2 is arranged in the inner shell 14, and there is a gap between the front end of the speaker 2 and the outer shell 13, and the gap is connected to both the first sound outlet 131 and the second sound outlet 132. The sound waves generated by the air in the gap pushed by the front end of the speaker 2 are propagated to the outside of the sound box through the second sound outlet 132 and the first sound outlet 131. Optionally, a dustproof net can also be provided at the second sound outlet 132 to prevent dust from entering.

[0031] In other embodiments, Figure 1 As shown, the outer shell 13 is provided with a second sound outlet hole 132 isolated from the first sound outlet hole 131, and the position of the second sound outlet hole 132 corresponds to the speaker 2. The speaker 2 can be installed at a position corresponding to the second sound outlet hole 132 on the inner shell 14 or installed on the outer shell 13. The front end of the speaker 2 radiates sound waves to the outside of the sound box through the second sound outlet hole 132. Therefore, the first sound outlet hole 131 is used for the sound wave radiation of the inverted tube 12, and the second sound outlet hole 132 is used for the sound wave radiation of the front end of the speaker 2, that is, the sound waves at the front end and the rear end of the speaker 2 are respectively radiated outward through two relatively independent passages in the sound box.

[0032] The box body 1 can be provided with one or more inverted tubes 12 as required. When multiple inverted tubes 12 are required, a partition plate can be provided between the inner shell 14 and the outer shell 13 to separate the multiple inverted tubes 12. For example, Figure 3 The box body 1 has two inverted tubes 12 extending in different directions along the inner wall of the shell 13, and the two inverted tubes 12 can be arranged to have substantially the same shape and size.

[0033] In some embodiments, the inverter tube 12 may have a plurality of external ports 124. Figure 1The inverted tube 12 includes a common channel 121 and at least two branch channels 122. The inner port 123 is provided in the common channel 121. The at least two branch channels 122 extend from one end of the common channel 121 away from the inner port 123 in different directions. Each branch channel 122 has an outer port 124 at one end away from the inner port 123. Therefore, after the sound waves in the cavity 11 pass through the common channel 121, they can propagate to the outside of the box 1 from the multiple branch channels 122. For example, referring to Figure 1 and Figure 2 The bass reflex tube 12 includes two branch channels 122, and the outer ports 124 of the two branch channels 122 are respectively arranged on both sides of the speaker 2. The two branch channels 122 can be designed to be mirror-symmetrical to each other, so that the sound of the speaker can be more balanced.

[0034] In some embodiments, the inverted tube 12 has an extension tube 125, which extends from the inner wall of the inner shell 14 into the cavity 11, the inner port 123 is provided on the extension tube 125, and the common channel 121 extends along the axis of the extension tube 125 and penetrates the extension tube 125. Figure 1 and Figure 2 The branch channel 122 is defined by the space between the outer shell 13 and the inner shell 14, and the common channel 121 is arranged in the extension tube 125. By providing the extension tube 125, the length of the inverted tube 12 can be more conveniently adjusted to meet the need for low-frequency enhancement of the speaker. Figure 1 and Figure 2 The extension tube 125 is arranged at the connection of the two branch channels 122. The extension tube 125 extends into the cavity 11 to receive the airflow generated by the rear end of the speaker 2 when it is working. The common channel 121 in the extension tube 125 and the two branch channels 122 formed between the outer shell 13 and the inner shell 14 constitute a structure similar to an "m" shape.

[0035] Reference Figure 1 Optionally, the inverted tube 12 and the speaker 2 can be respectively arranged in two different areas of the box 1. The inverted tube 12 extends along the portion of the housing 13 located behind the speaker 2, leaving sufficient space for installation. The location of the external port 124 can be selected according to actual needs. For example, referring to Figure 1 The outer port 124 is closer to the plane where the front end of the loudspeaker 2 is located than the inner port 123, and the inverted tube 12 is formed into an arch structure.

[0036] Preferably, the inner wall of the inverted tube 12 is a smooth surface to reduce the noise generated by the friction between the airflow and the inner wall of the inverted tube 12, thereby improving the sound quality of the speaker.

[0037] In some embodiments, the inner port 123 is formed in a trumpet shape, and the cross-sectional area of ​​the inner port 123 gradually increases in the extension direction of the channel along the direction away from the outer port 124, that is, the diameter of the inverter tube 12 at one end close to the cavity 11 gradually increases, which is conducive to guiding the airflow in the cavity 11 into the channel of the inverter tube 12.

[0038] The speaker may also have a control circuit board, which is electrically connected to the speaker 2 for controlling the operation of the speaker 2, and the control circuit board may be disposed in the cavity 11. The speaker of the embodiment of the present invention may be used not only as an audio playback device, but also in a voice interaction device, such as an intelligent interactive speaker. The control circuit may control the operation of the speaker according to the received instructions.

[0039] The speaker of the embodiment of the present invention makes full use of the structure of the box 1 itself by extending the inverted tube 12 along the inner wall of the outer shell 13 of the box 1, and allows the inverted tube 12 to have a longer length when the box 1 is small in size, thereby increasing the design space for the length of the inverted tube 12, which is conducive to making the speaker have a better low-frequency effect. In some embodiments, by setting the space between the outer shell 13 and the inner shell 14 of the box 1 as at least a part of the inverted tube 12, the appearance of the speaker can have a larger design space.

[0040] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sound box, characterized in that: include: A box (1) comprises an outer shell (13) and an inner shell (14), wherein the outer shell (13) is arranged outside the inner shell (14), the box (1) has a cavity (11) and an inverted tube (12), the space between the outer surface of the inner shell (14) and the inner surface of the outer shell (13) forms at least a part of the inverted tube (12), the inverted tube (12) has an inner port (123) and an outer port (124), the inner port (123) is connected to the cavity (11), the outer shell (13) further has a first sound outlet (131), and the outer port (124) is connected to the first sound outlet (131); and A loudspeaker (2) is arranged in the box (1), the rear end of the loudspeaker (2) is arranged in the cavity (11), and the front end of the loudspeaker (2) is away from the cavity (11) so as to radiate sound waves to the outside of the box (1).

2. The speaker according to claim 1, characterized in that: The loudspeaker (2) is arranged in the inner shell (14); a gap is provided between the front end of the loudspeaker (2) and the outer shell (13); the gap is connected to the first sound outlet hole (131); and the front end of the loudspeaker (2) radiates sound waves to the outside of the sound box through the first sound outlet hole (131).

3. The speaker according to claim 1, characterized in that: The inverter tube (12) comprises a common channel (121) and at least two branch channels (122); the inner port (123) is arranged on the common channel (121); at least two branch channels (122) extend from one end of the common channel (121) away from the inner port (123) in different directions; and each branch channel (122) has an outer port (124).

4. The speaker according to claim 3, characterized in that: The inverted tube (12) comprises two branch channels (122), and the external ports (124) of the two branch channels (122) are respectively arranged on both sides of the speaker (2).

5. The speaker according to claim 3, characterized in that: The inverter tube (12) has an extension tube (125), the extension tube (125) extends from the inner wall of the inner shell (14) into the cavity (11), the common channel (121) extends along the axis of the extension tube (125) and passes through the extension tube (125), and the inner port (123) is provided on the extension tube (125).

6. The speaker according to claim 1, characterized in that: The inner port (123) is formed in a trumpet shape, and the cross-sectional area of ​​the inner port (123) gradually increases in the direction away from the outer port (124) in the extending direction of the inverted tube (12).

7. The speaker according to claim 1, characterized in that: The inner wall of the inverted tube (12) is a smooth surface.

8. The speaker according to claim 1, characterized in that: The outer shell (13) also has a second sound outlet hole (132); the loudspeaker (2) is arranged in the inner shell (14); a gap is provided between the front end of the loudspeaker (2) and the outer shell (13); the gap is connected to both the second sound outlet hole (132) and the first sound outlet hole (131).

9. The speaker according to claim 1, characterized in that: The housing (13) also has a second sound outlet hole (132), the loudspeaker (2) corresponds to the position of the second sound outlet hole (132), and the front end of the loudspeaker (2) radiates sound waves to the outside of the sound box through the second sound outlet hole (132).

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