CN211019149U

CN211019149U - Low-frequency sound box

Info

Publication number: CN211019149U
Application number: CN201921688030.0U
Authority: CN
Inventors: 曾山
Original assignee: Maloney Guangzhou Technology Development Co ltd
Current assignee: Guangzhou Meizhen Electronic Technology Co.,Ltd.
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-07-14
Anticipated expiration: 2029-10-10

Abstract

The utility model discloses a low-frequency sound box, which comprises a box body and a horn unit, wherein the opening surface of the horn unit faces the bottom wall of the box body, and the side wall of the box body is provided with sound outlet holes; a first sound channel is arranged between the horn unit and the bottom wall of the box body, so that air on the opening surface of the horn unit flows to the sound outlet hole through the first sound channel; a second sound channel is arranged between the loudspeaker unit and the top wall of the box body, so that air flow behind the loudspeaker unit flows to the sound outlet hole through the second sound channel. The first sound channel and the second sound channel are added by changing the direction of the opening surface of the horn unit, so that the distance of air flowing through the box body is increased, the condition that the air in the box body flows out of the box body due to pressure change is avoided, and sufficient air can be still pushed under the condition of low frequency. Compared with the prior art, the utility model discloses a low frequency audio amplifier has overall small, and occupation space is little, the characteristics of the transportation of being convenient for.

Description

Low-frequency sound box

Technical Field

The utility model relates to a sound equipment technical field especially relates to a low frequency sound box.

Background

In sound systems, a sound box is an important device. The speaker box generally comprises a speaker unit and a box body. The loudspeaker unit is used as a sound production component, the sound production principle is that electric energy is converted into sound, when different electronic energy is transmitted to the coil, the coil generates energy to interact with the magnetic field of the magnet, and the interaction causes the vibration of the paper disc, so that the density degree of air is changed to produce sound. The sound boxes can be classified into high-frequency sound boxes, medium-frequency sound boxes and low-frequency sound boxes according to the sound reproduction frequency. Where the low frequencies have wavelengths much longer than the high frequencies, the horn unit is required to push enough air to have sufficient loudness in a low frequency loudspeaker enclosure.

In the prior art, an opening surface of a horn unit of a low-frequency sound box generally faces the outside of the sound box, and a sound-producing cavity is a space between the back surface of the horn unit and the sound box. In order to push enough air, a loudspeaker unit in a traditional low-frequency sound box is set to be larger, so that mechanical energy generated by the cone when the cone vibrates is larger; correspondingly, the sound-generating chamber with which it cooperates is also arranged to be relatively large, otherwise, since air is a fluid, it is pushed at a low frequency and has not yet had time to produce a pressure change, and the air is already flowing away. Therefore, the low-frequency sound box in the prior art is large in overall size, large in occupied space and inconvenient to transport.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a: the low-frequency sound box is small in overall size, small in occupied space and convenient to transport.

The purpose of the utility model is realized by adopting the following technical scheme:

a low-frequency sound box comprises a box body and a loudspeaker unit, wherein an opening surface of the loudspeaker unit faces to the bottom wall of the box body, and sound outlet holes are formed in the side wall of the box body; a first sound channel is arranged between the horn unit and the bottom wall of the box body, so that air on the opening surface of the horn unit flows to the sound outlet hole through the first sound channel; and a second sound channel is arranged between the loudspeaker unit and the top wall of the box body, so that air flow behind the loudspeaker unit flows to the sound outlet hole through the second sound channel.

As a further embodiment, the sound outlet holes are provided with two, namely a first sound outlet hole and a second sound outlet hole; the first sound outlet is formed in the lower end of the side wall of the box body and communicated with the first sound channel; the second sound outlet is formed in the upper end of the side wall of the box body and communicated with the second sound channel.

In this embodiment, the sound of the first sound channel is emitted from the first sound emitting hole at the lower end, and the sound of the second sound channel is emitted from the second sound emitting hole at the upper end, so that the sound emitting effect is more uniform.

As a further embodiment, the plane of the opening surface of the horn unit is parallel to the plane of the bottom wall of the box body.

In the embodiment, the process for installing the horn units in a parallel mode is simple and rapid, and the efficiency is high.

As a further embodiment, a plane where the opening surface of the horn unit is located intersects with a plane where the bottom wall of the box body is located, and the opening surface of the horn unit is inclined toward the side wall of the box body where the sound outlet hole is provided.

In this embodiment, the horn unit is installed in an inclined manner, which is beneficial to reducing oblique vibration sound although the process is complicated.

As a further embodiment, the second sound channel is a meandering channel.

In this embodiment, the second sound channel is arranged in a bent manner, so that the distance through which air flows in the box body can be further increased, and thus sufficient air can be still pushed under the condition of further ensuring low frequency.

As a further embodiment, the portable sound outlet device further comprises a protection net, wherein the protection net is fixedly installed on the outer end face of the side wall provided with the sound outlet hole.

In this embodiment, the protection net is used for protecting the internal components of the sound box, such as preventing dust, small insects and the like from entering the box body.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a low frequency sound box, including box and loudspeaker unit, through the orientation direction that changes loudspeaker unit opening face, increase first sound passageway and second sound passageway to increase the distance that the air flowed through in the box, reach the condition that produces pressure variation just to flow to the box outside in order to avoid the air in the box still, and then still can promote abundant air under the condition of guaranteeing the low frequency. In the prior art, since the conventional low-frequency sound box is not provided with a sound channel, the sound-emitting cavity needs to be set larger, thereby resulting in an increase in the overall volume. Therefore, compared with the prior art, the utility model discloses a low frequency audio amplifier has overall small, and occupation space is little, the characteristics of the transportation of being convenient for.

Drawings

Fig. 1 is an appearance schematic diagram of a low frequency sound box provided by the present invention;

FIG. 2 is a schematic cross-sectional view of the low frequency enclosure shown in FIG. 1 (arrows indicate the flow of air);

in the figure: 1. a box body; 2. a horn unit; 3. a first sound outlet; 4. a second sound outlet; 5. a first sound channel; 6. a second sound channel; 7. and (4) a protection net.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-2, the low frequency speaker of the present invention includes a box body 1 and a speaker unit 2. Wherein, the opening surface of the horn unit 2 faces the bottom wall of the box body 1, and the side wall of the box body 1 is provided with a sound outlet. A first sound channel 5 is arranged between the horn unit 2 and the bottom wall of the box body 1, so that the air flow on the opening surface of the horn unit 2 flows to the sound outlet through the first sound channel 5; a second sound passage 6 is provided between the speaker unit 2 and the top wall of the cabinet 1, so that the air flow behind the speaker unit 2 flows to the sound outlet hole through the second sound passage 6 (the arrow in fig. 2 is the flow direction of the air).

The utility model discloses a low frequency audio amplifier is through changing the orientation direction of 2 opening faces of loudspeaker unit, increases first sound passageway 5 and second sound passageway 6 to increase the distance that the air flowed through in box 1, with the air of avoiding in the box 1 still not reach and produce the condition that pressure variation just flowed to the box 1 outside, and then still can promote abundant air under the circumstances of guaranteeing the low frequency. In the prior art, since the conventional low-frequency sound box is not provided with a sound channel, the sound-emitting cavity needs to be set larger, thereby resulting in an increase in the overall volume. Therefore, compared with the prior art, the utility model discloses a low frequency audio amplifier has overall small, and occupation space is little, the characteristics of the transportation of being convenient for.

Further, the second sound channel 6 in this embodiment is a bent channel, and when air flows through the second sound channel 6, the air needs to turn, so that the flow path of the air flowing through the box body 1 is increased, and further sufficient air can be still pushed under the condition of low frequency. As shown in fig. 2, the low frequency sound box of the present embodiment is provided with a bending portion.

Wherein, the mounting means of loudspeaker has two kinds: the plane of the opening surface of the horn unit 2 is parallel to the plane of the bottom wall of the box body 1, and the arrangement mode is simple in process, easy to install and high in efficiency. Secondly, the plane of the opening surface of the horn unit 2 intersects with the plane of the bottom wall of the box body 1, the opening surface of the horn unit 2 inclines towards the side wall of the box body 1 provided with the sound outlet (namely, one end of the horn unit 2 is far away from the bottom wall, and the other end is close to the bottom wall, wherein the end far away from the bottom wall is close to the side wall provided with the sound outlet).

Preferably, the sound outlet holes are provided with two, respectively a first sound outlet hole 3 and a second sound outlet hole 4. Wherein, the first sound outlet 3 is arranged at the lower end of the side wall of the box body 1 and is communicated with the first sound channel 5; the second sound outlet 4 is arranged at the upper end of the side wall of the box body 1 and communicated with the second sound channel 6, so that the sound outlet effect is more uniform.

Preferably, the outer end face of the side wall of the sound outlet hole is also fixedly provided with a protective net 7. The protective net 7 is used for protecting the internal components of the sound box, such as preventing dust, small insects and the like from entering the box body 1.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a low frequency audio amplifier, includes box and loudspeaker unit, its characterized in that: the opening surface of the horn unit faces the bottom wall of the box body, and a sound outlet hole is formed in the side wall of the box body; a first sound channel is arranged between the horn unit and the bottom wall of the box body, so that air on the opening surface of the horn unit flows to the sound outlet hole through the first sound channel; and a second sound channel is arranged between the loudspeaker unit and the top wall of the box body, so that air flow behind the loudspeaker unit flows to the sound outlet hole through the second sound channel.

2. The low frequency sound box of claim 1, wherein: the two sound outlet holes are respectively a first sound outlet hole and a second sound outlet hole; the first sound outlet is formed in the lower end of the side wall of the box body and communicated with the first sound channel; the second sound outlet is formed in the upper end of the side wall of the box body and communicated with the second sound channel.

3. The low frequency sound box of claim 1, wherein: the plane of the opening surface of the horn unit is parallel to the plane of the bottom wall of the box body.

4. The low frequency sound box of claim 1, wherein: the plane of the horn unit opening surface is intersected with the plane of the bottom wall of the box body, and the opening surface of the horn unit inclines towards the side wall of the box body, which is provided with the sound outlet hole.

5. The low frequency sound box of claim 1, wherein: the second sound channel is a bent channel.

6. The low frequency sound box of claim 1, wherein: the sound outlet device further comprises a protection net which is fixedly arranged on the outer end face of the side wall provided with the sound outlet hole.