Indirect sound box

Abstract

The indirect sound box comprises a box body, the box body is divided into a first sound production cavity and a super bass sound production cavity which are not communicated with each other, at least one first loudspeaker is arranged in the first sound production cavity, the first loudspeaker is embedded in the side wall of the box body, and a sound outlet faces the outer side of the box body. The super bass loudspeaker is erected in the super bass sounding cavity, and the super bass loudspeaker is arranged in the box body in a hidden mode; according to the utility model, an ultra-bass effect can be integrated in a small-size single sound box, and the ultra-bass sound box can be better hidden in the sound box, so that the portability of the sound box is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sound box equipment, concretely relates to an indirect sound box. BACKGROUND

[0002] Small sound boxes are widely used all over the world, and the most common ones are small Bluetooth sound boxes used in daily life, such as desktop sound boxes in the bedroom, office table, dining table, etc., sports sound boxes carried while cycling or running, or various sound amplifiers, echo walls, TV companions for improving the sound quality of TV sets, or small broadcast sound boxes and small linear array sound boxes, etc.

[0003] The existing small sound boxes have a great difference in sound quality effect from large sound boxes when playing low-frequency sound. The main reason is that the small size of the sound box leads to a small sound radiation area of the loudspeaker, which is not enough to flow a large amount of air and produce deep and extremely powerful bass.

[0004] Therefore, in order to improve the bass effect, the user also needs to increase the bass sound box to improve the sound performance of the low-frequency part. However, increasing a sound box not only reduces the portability of the small sound box, but also makes the line connection more complex, greatly reducing the user's experience. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims to provide an indirect sound box which can integrate ultra-low sound effect in a single sound box with small size, and better hide the ultra-low sound box inside the sound box, increasing the portability of the sound box.

[0006] In order to solve the above technical problems, the technical scheme of the utility model is:

[0007] An indirect sound box comprises a box body, the box body is divided into a first sound cavity and an ultra-low sound cavity which are not connected to each other, at least one first loudspeaker is arranged in the first sound cavity, the first loudspeaker is embedded on the side wall of the box body and the sound outlet is directed to the outside of the box body, an ultra-low sound loudspeaker is arranged in the middle part of the ultra-low sound cavity, and the ultra-low sound loudspeaker is hidden in the box body.

[0008] The further technical scheme of the embodiment is that a partition plate is arranged in the ultra-low sound cavity, the partition plate divides the ultra-low sound cavity into a first cavity and a second cavity, the ultra-low sound loudspeaker and a sound quality enhancement structure are arranged through the partition plate.

[0009] The further technical scheme of the embodiment is that the sound quality enhancement structure is arranged on the opposite sides in the second cavity.

[0010] The further technical scheme of the embodiment is that the sound quality enhancement structure is configured as an inverted phase tube and / or a passive radiator.

[0011] The further technical solution of the embodiment is that the inner side wall of the first sound cavity is provided with an inverting tube and / or a passive radiator.

[0012] The further technical solution of the embodiment is that the side wall of the first sound cavity is further embedded with a second loudspeaker and a sound outlet, and the first sound cavity is communicated with the sound outlet through the inverting tube.

[0013] The further technical solution of the embodiment is that the first cavity is communicated with the sound outlet through the inverting tube.

[0014] The further technical solution of the embodiment is that the sound outlet forms at least two passages, and the passages are respectively communicated with the first inverting tube and the second inverting tube.

[0015] The technical effect of the utility model mainly embodies:

[0016] In the embodiment, the first sound cavity and the subwoofer sound cavity are arranged in the same sound box body, so that the user can obtain good full-frequency sound and low-frequency sound performance without additionally increasing the subwoofer sound box, and the subwoofer sound cavity and the subwoofer loudspeaker are arranged in the sound box, the air pushed by the subwoofer loudspeaker has mass and elasticity, so that the air is in a resonance state, the resonance characteristics are fully utilized, the sound box portability is ensured, the sound box low-frequency frequency is widened, the distortion of the whole sound box is reduced, and the user can feel the sound quality effect of the small sound box with the large professional sound. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the embodiment one of the utility model;

[0018] Figure 2 It is a structural schematic view of the embodiment two of the utility model;

[0019] Figure 3 It is a structural schematic view of the embodiment three of the utility model;

[0020] Figure 4 It is a structural schematic view of the embodiment four of the utility model.

[0021] The reference signs are as follows: 10 - first sound cavity; 11 - first loudspeaker; 12 - second loudspeaker; 13 - sound outlet; 20 - subwoofer sound cavity; 21 - subwoofer loudspeaker; 22 - partition; 23 - first cavity; 24 - second cavity; 30 - passive radiator; A - first inverting tube; B - second inverting tube. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, so that the technical scheme of the present application is easier to understand and master.

[0023] In the present embodiment, it is to be understood that the terms "intermediate", "upper", "lower", "top", "right side", "left end", "upper", "back", "middle", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, in the present embodiment, the connection or fixing method between the components is not specifically described, and the connection or fixing method can be bolted or pinned, or connected by a pin shaft, etc. commonly used in the prior art, so that the present embodiment is not described in detail.

[0025] Example 1

[0026] The existing small sound box cannot simultaneously consider full frequency, low frequency and ultralow frequency signals due to size limitations. To this end, the present embodiment proposes a structure diagram of an indirect sound box as shown in the figure. Figure 1 The cabinet is divided into a first sound cavity 10 and an ultralow sound cavity 20 which are not connected to each other. The first sound cavity 10 is provided with at least one first loudspeaker 11, the first loudspeaker 11 is embedded on the side wall of the cabinet and the sound outlet is directed to the outside of the cabinet, and the ultralow sound cavity 20 is provided with an ultralow loudspeaker 21 in the middle to hide the ultralow loudspeaker 21 inside the cabinet. It can be understood that the first loudspeaker 11 in the first sound cavity 10 no longer needs to bear the original full frequency bandwidth by adding the ultralow sound cavity 20. In the sound box miniaturization, the high, medium and low three-frequency or high and low two-frequency of the first loudspeaker are respectively borne by the first loudspeaker 11 and the ultralow loudspeaker 21, thereby providing better sound effect. Specifically, the first loudspeaker 11 in the present embodiment is usually a full-frequency loudspeaker unit to simplify the number of loudspeakers inside the traditional sound box and reduce the size of the sound box. At the same time, in order to retain good low frequency, the ultralow sound cavity 20 is added in the present embodiment and hidden inside the sound box, and the ultralow loudspeaker 21 arranged therein cooperates with the first loudspeaker 11 to enable the present application to realize full frequency coverage from ultralow frequency to medium and high frequency, provide better bass experience, and at the same time ensure that the device is small in size and more portable.

[0027] Specifically, the subwoofer sound cavity 20 is provided with a baffle 22, the baffle 22 divides the subwoofer sound cavity 20 into a first cavity 23 and a second cavity 24, the baffle 22 is provided with a subwoofer 21 and a sound quality enhancement structure, the first cavity 23 is a cavity in front of the subwoofer, the second cavity 24 is a cavity behind the subwoofer, and the sound quality enhancement structure is configured as a reverse phase tube and / or a passive radiator 30. The reverse phase tube leads the sound waves radiated from the back of the subwoofer 21 to the front of the subwoofer, so that the sound waves are superimposed with the sound waves emitted from the front of the subwoofer, and through the design of the length and diameter of the reverse phase tube, the sound waves and the sound waves emitted from the front of the horn are in phase in a certain frequency range, thereby enhancing the sound output intensity of the frequency band, making the sound box sound louder and fuller in the low frequency band.

[0028] In an optional embodiment, the sound quality enhancement structure is arranged on the opposite two side walls in the second cavity 24, which can effectively increase the low frequency energy output. Through the opposite arrangement of the two reverse phase tubes, the sound waves radiated by the subwoofer in the first cavity 23 and the second cavity 24 are led out and superimposed respectively, which can effectively increase the radiation amount and energy of the low frequency sound waves, make the low frequency sound more full and deep, enhance the bass effect of the sound box, and improve the rhythm and atmosphere of the music.

[0029] In the embodiment, the first sound cavity 10 and the subwoofer sound cavity 20 are both separated from the outside of the box; specifically, the sound outlet of the first subwoofer 11 is embedded on the side wall of the first sound cavity 10, and the sound waves are generated by pushing the air outside the box, and the subwoofer 21 is embedded on the baffle 22 inside the box. Because the sound box is small in size and has strong subwoofer diffraction ability, the sound pressure level generated by the subwoofer 21 will be superimposed and enhanced even if the subwoofer sound cavity 20 is hidden inside the box. In addition, the first sound cavity 10 eliminates the sound quality enhancement structure and is designed as a closed sound box, so that the overall size of the sound box is greatly reduced, the vibration of the sound box is very small, and the product can be carried in the pocket or installed in the computer case, while also having good low frequency performance.

[0030] It can be understood that multiple sound quality enhancement structures such as reverse phase tubes and passive radiators 30 can also be arranged in the first sound cavity 10 to enhance the sound performance of high frequency and medium frequency.

[0031] Embodiment two

[0032] The difference between this embodiment and Embodiment 1 is that the sound enhancement structure in the subwoofer cavity is configured as a passive radiator. The passive radiator 30 is typically a diaphragm. When the subwoofer 21 vibrates, the second cavity 24 and the first cavity 23 compress and expand the air inside the cavity, causing a change in the air pressure inside the cavity. The passive radiator 30 vibrates under the action of this air pressure change. The frequency and amplitude of its vibration depend on the change in air pressure and the physical properties of the passive radiator 30 itself, such as mass and elasticity. Unlike a bass reflex port, the passive radiator 30 radiates sound waves through its own vibration, rather than directly guiding the sound waves from the second cavity 24 to the front of the speaker to generate amplification. It can be understood that both sound enhancement structures in Embodiment 1 and Embodiment 2 can effectively improve the low-frequency performance of the speaker, thereby achieving a fuller low-frequency sound performance in a small-volume speaker.

[0033] Example 3

[0034] like Figure 2 As shown, in this embodiment, an adjacent but non-communicating first bass reflex port A and second bass reflex port B are provided between the first sound cavity 10 and the subwoofer sound cavity 20. Specifically, the first bass reflex port A is located in the first sound cavity 10, and the second bass reflex port B is located in the subwoofer sound cavity 20. The second bass reflex port B and the first cavity 23 inside the subwoofer sound cavity 20 form a Helmholtz resonator, and the first bass reflex port A and the first sound cavity 10 form a Helmholtz resonator. When the speaker in the speaker box emits sound, the sound waves will propagate inside the speaker box and make the air inside the box... The air vibrates, and the presence of the bass reflex port allows the air inside the speaker enclosure to communicate and exchange with the outside air. When the vibration frequency of the air inside the enclosure approaches the Helmholtz resonant frequency formed by the bass reflex port and the internal space of the speaker enclosure, resonance occurs, thereby improving the radiation efficiency of low-frequency sound, making the low-frequency sound fuller and more powerful. The electroacoustic conversion efficiency of the speaker enclosure is improved, thereby effectively reducing distortion and increasing the sound pressure level of low-frequency sound. As a result, a low-frequency sound with a lower frequency, higher sound pressure, and less distortion can be emitted from a small-volume speaker enclosure.

[0035] Specifically, a passive radiator 30 is provided on the partition 22 in the subwoofer cavity 20. When the subwoofer speaker 21 vibrates, the air in the second cavity 24 also vibrates, thereby pulling the passive radiator 30. This causes the passive radiator 30 to generate a sound wave with the same frequency as the sound wave emitted from the front end of the subwoofer speaker 21, thus achieving resonance. The passive radiator 30 and the second cavity 24 constitute a Helmholtz resonator, thereby further increasing the sound pressure level of the ultra-low frequency sound and improving the sound quality of the subwoofer.

[0036] In this embodiment, the first bass reflex tube A and the second bass reflex tube B both lead to a sound outlet 13. The sound outlet 13 is provided with a partition plate in the middle to separate the first bass reflex tube A and the second bass reflex tube B, so as to separate the first bass reflex tube A and the second bass reflex tube B and form the enclosure into an independent first sound cavity and a subwoofer sound cavity.

[0037] In this preferred embodiment, the first sound cavity 10 is provided with a first speaker 11 and a second speaker 12. According to user needs, a high-frequency speaker and a mid-frequency speaker can be selected to further improve the sound performance.

[0038] Example 4

[0039] like Figure 3 As shown, the difference between this embodiment and the second embodiment is that the subwoofer cavity 20 and the first cavity 10 have the same sound outlet 13, which ensures the sound effect while making the speaker design simpler and more beautiful.

[0040] The main technical advantage of this invention is that by setting the first sound cavity and the subwoofer sound cavity in the same speaker enclosure, users can obtain good full-range and low-frequency sound performance without having to add an additional subwoofer speaker. At the same time, since the subwoofer sound cavity and the subwoofer speaker are hidden inside the enclosure, the overall portability of the speaker is improved. The low-frequency performance of the sound can be reproduced with a small volume, which effectively improves the user experience.

[0041] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. An indirect speaker enclosure comprising an enclosure, characterized by, The box is divided into a first sound cavity (10) and a subwoofer sound cavity (20) which are not communicated with each other, at least one first loudspeaker (11) is arranged in the first sound cavity (10), the first loudspeaker (11) is embedded on the side wall of the box and the sound outlet is towards the outside of the box, a subwoofer loudspeaker (21) is arranged in the middle of the subwoofer sound cavity (20), and the subwoofer loudspeaker (21) is arranged in the inside of the box.

2. An indirect speaker as claimed in claim 1, wherein, A partition (22) is arranged in the subwoofer sound cavity (20), the partition (22) divides the subwoofer sound cavity (20) into a first cavity (23) and a second cavity (24), the subwoofer loudspeaker (21) and a sound quality enhancement structure are arranged on the partition (22).

3. An indirect speaker as claimed in claim 2, wherein, The sound quality enhancement structure is arranged on the two opposite sides in the second cavity (24).

4. An indirect speaker as claimed in claim 3, wherein, The sound quality enhancement structure is configured as an inverted phase tube and / or a passive radiator (30).

5. An indirect speaker as claimed in claim 2, wherein, An inverted phase tube and / or a passive radiator (30) is arranged on the inner side wall of the first sound cavity (10).

6. An indirect speaker as claimed in claim 5, wherein, A second loudspeaker (12) and a sound outlet (13) are also embedded on the side wall of the first sound cavity (10), and the first sound cavity (10) is communicated with the sound outlet (13) through the inverted phase tube.

7. An indirect speaker as claimed in claim 6, wherein, The first cavity (23) is communicated with the sound outlet (13) through the inverted phase tube.

8. An indirect speaker as claimed in claim 7, wherein, The first sound cavity (10) and the subwoofer sound cavity (20) are arranged with adjacent and non-communicated first and second inverted phase tubes, and the sound outlet (13) forms at least two paths which are communicated with the first and second inverted phase tubes (14, 25) respectively.

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