Small-size bass sound box

Abstract

The utility model provides a small volume bass sound box, which comprises a hollow box body, a mega bass horn embedded in the front side surface of the box body, and an air guide pipe vertically penetrating through the front side surface of the box body and extending backwards, the rear end part of the mega bass horn extends into the box body, and the air guide pipe comprises a straight pipe, and a front horn cover and a rear horn cover which are connected to the two end parts of the straight pipe. The gap is formed between the rear horn cover and the inner wall of the box body, and sound waves in the box body can be led out through the air guide pipe, so that the size of the sound box is reduced; the conical flow guide cover is arranged in the gap, the front end of the conical flow guide cover extends into the rear horn cover, the rear end of the conical flow guide cover is attached to the inner wall of the box body, and the outer wall of the conical flow guide cover is parallel to the inner wall of the rear horn cover, so that airflow in the box body can smoothly enter the air guide pipe through matching of the outer wall of the conical flow guide cover and the inner wall of the rear horn cover; the turbulence at the opening of the end part of the air guide pipe is greatly reduced, the energy loss is reduced, the formed bass impact force is strong, the noise in the bass is also weakened, and the purity of the bass is better.

Description

Technical Field

[0001] The utility model relates to the technical field of bass sound boxes, in particular to a small-volume bass sound box with small low-frequency loss and high radiation efficiency. Background Art

[0002] As far as the analysis of an audio segment is concerned, it is composed of sub-bass, bass, mid-bass, mid-range, mid-treble, treble, super treble, etc. The bass (long wave) is the vitality and vigor of the sound, the mid-range (medium wave) is the flesh and blood of the sound, and the treble (short wave) reflects the details of the sound. To better reproduce the sound, the bass part of the audio needs to be reproduced as much as possible through the speakers.

[0003] The speaker diaphragms of existing speakers are mostly exposed to the atmosphere, which is conducive to producing mid-range and treble sounds. However, the bass is relatively weak due to the lack of speaker enhancement, so a larger speaker unit (such as 8-inch to 15-inch) is needed to compensate for it, resulting in a large volume, heavy weight and high cost of the speaker. To solve this problem, a bass speaker with an air duct installed on the speaker has appeared on the market. The air duct is used to guide the sound waves behind the speaker in the speaker to strengthen the heavy bass. However, since the end opening of the air duct is relatively abrupt, the air flow in the speaker is prone to form turbulence at the end opening of the air duct, resulting in a partial energy loss. When it rushes out of the air duct, the impact of the bass formed is weak; furthermore, the turbulence flowing out of the air duct will also form noise in the bass, resulting in poor purity of the bass. Utility Model Content

[0004] The utility model aims to solve one or more defects in the prior art and provide a small-volume bass speaker with strong bass impact and high bass purity.

[0005] In order to achieve the above object, the technical solution provided by the utility model is a small-volume bass speaker, comprising:

[0006] A box body, wherein the interior of the box body is hollow;

[0007] A subwoofer, wherein the subwoofer is embedded in the front side of the box, and the rear end of the subwoofer extends into the box;

[0008] An air duct, the air duct vertically penetrates the front side of the box body and extends backward, the air duct includes a straight pipe, a front speaker cover connected to the front end of the straight pipe and opened forward and outward, and a rear speaker cover connected to the rear end of the straight pipe and opened backward and outward;

[0009] There is a gap between the rear speaker cover and the inner wall of the box body, and a conical air deflector is provided in the gap. The front end of the conical air deflector extends into the rear speaker cover, the rear end of the conical air deflector is in contact with the inner wall of the box body, and the outer wall of the conical air deflector is parallel to the inner wall of the rear speaker cover.

[0010] Preferably, the outer wall of the conical air guide cover is smoothly connected to the inner wall of the box body.

[0011] Further preferably, the inner wall of the box body is provided with a blind hole for embedding the conical air deflector, and the hole depth of the blind hole is greater than or equal to the wall thickness of the conical air deflector.

[0012] Further preferably, the conical air deflector includes a support column located in the middle and an umbrella cover connected to the support column, the rear end face of the support column is pressed against the center of the blind hole, and the edge of the umbrella cover is embedded in the blind hole and flush with the hole edge of the blind hole.

[0013] Preferably, the distance between the outer wall of the conical air deflector and the inner wall of the rear horn cover is half of the inner diameter of the straight pipe.

[0014] Preferably, the rear opening diameter of the rear horn cover is twice the inner diameter of the straight tube, and the front opening diameter of the front horn cover is smaller than the rear opening diameter of the rear horn cover.

[0015] Preferably, a support plate for supporting the straight tube is provided in the box body, and an upper end surface of the support plate is provided with a U-shaped groove matching the outer wall of the straight tube.

[0016] Preferably, the front side surface of the box body is provided with a countersunk hole for mounting the front speaker cover, and the plane where the front opening of the front speaker cover is located is flush with the front side surface of the box body.

[0017] Preferably, there are two air guide ducts, and the two air guide ducts are symmetrically distributed on both sides of the axis of the subwoofer.

[0018] Preferably, the air duct is located below the subwoofer.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] The utility model provides a small-volume bass speaker box, comprising a hollow box body, a subwoofer speaker embedded in the front side of the box body, and an air duct vertically penetrating the front side of the box body and extending backwards, wherein the rear end of the subwoofer speaker extends into the box body, and the air duct comprises a straight pipe, a front speaker cover and a rear speaker cover connected to both ends of the straight pipe. By providing a gap between the rear speaker cover and the inner wall of the box body, the air duct can be used to guide the sound waves in the box body out, thereby reducing the size of the speaker and the volume of the speaker box; by arranging a conical air duct in the gap, the front end of the conical air duct is extended into the rear speaker, and the sound waves in the box body are guided out by the air duct ... The speaker cover is designed so that its rear end is in contact with the inner wall of the box and its outer wall is parallel to the inner wall of the rear speaker cover. The cooperation between the outer wall of the conical air guide cover and the inner wall of the rear speaker cover can make the air flow in the box enter the air duct smoothly, greatly reducing the turbulence at the opening at the end of the air duct and reducing energy loss. The bass impact is strong and the noise in the bass is weakened, making the bass purer. At certain frequencies, the sound waves led out by the air duct can be close to the phase of the sound waves radiated from the front of the subwoofer, thereby improving the radiation efficiency and extending the low-frequency response. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of a preferred embodiment of the utility model.

[0022] Figure 2 yes Figure 1 Schematic cross-sectional view along the AA direction.

[0023] Among them: 10. Box body; 11. Cavity; 12. Blind hole; 13. Support plate; 131. U-shaped groove; 14. Countersunk hole; 20. Subwoofer; 30. Air duct; 31. Straight pipe; 32. Front speaker cover; 33. Rear speaker cover; 331. Gap; 40. Conical air guide cover; 41. Support column; 42. Umbrella cover. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0025] like Figure 1 and Figure 2As shown, the small-volume bass speaker provided by the utility model comprises: a box body 10, a subwoofer 20, an air duct 30, and a conical air duct 40, wherein the box body 10 is hollow inside to form a cavity 11; the subwoofer 20 is embedded in the front side of the box body 10, and the rear end of the subwoofer 20 extends into the cavity 11 of the box body 10; the air duct 30 vertically penetrates the front side of the box body 10 and extends backward, and the air duct 30 comprises a straight pipe 31, a A front horn cover 32 is connected to the front end of the straight pipe 31 and opens forward and outward, and a rear horn cover 33 is connected to the rear end of the straight pipe 31 and opens backward and outward, and a gap 331 is defined between the rear horn cover 33 and the rear inner wall of the box body 10; a conical air guide cover 40 is disposed in the gap 331, a front end of the conical air guide cover 40 extends into the rear horn cover 33, a rear end of the conical air guide cover 40 is in contact with the rear inner wall of the box body 10, and an outer wall of the conical air guide cover 40 is parallel to the inner wall of the rear horn cover 33.

[0026] The advantage of this arrangement is that the air duct can be used to lead the sound waves in the box out, thereby reducing the size of the speaker and the volume of the sound box; and the outer wall of the conical air duct can be used in conjunction with the inner wall of the rear speaker cover to allow the air flow in the box to smoothly enter the air duct, greatly reducing the turbulence at the opening at the end of the air duct and reducing energy loss. The resulting bass has a strong impact and, at the same time, reduces the noise in the bass, making the bass purer. At certain frequencies, the sound waves led out of the air duct can be close in phase with the sound waves radiated from the front of the subwoofer, thereby improving the radiation efficiency and extending the low-frequency response.

[0027] In this embodiment, the outer wall of the conical air deflector 40 is smoothly connected to the rear inner wall of the box body 10. Specifically, the rear inner wall of the box body 10 is provided with a blind hole 12 for embedding the conical air deflector 40. The hole depth of the blind hole 12 is equal to the wall thickness of the conical air deflector 40. Furthermore, the conical air deflector 40 includes a support column 41 located in the middle and an umbrella cover 42 connected to the support column 41. The rear end face of the support column 41 is pressed against the center of the blind hole 12, and the edge of the umbrella cover 42 is embedded in the blind hole 12 and is flush with the hole edge of the blind hole 12.

[0028] The distance between the outer wall of the conical air deflector 40 and the inner wall of the rear speaker cover 32 is positively correlated with the lowest frequency of the sound waves with close phases, that is, the larger the distance between the outer wall of the conical air deflector 40 and the inner wall of the rear speaker cover 32, the smoother the airflow enters, and the higher the lowest frequency of the sound waves with close phases. However, due to the volume limitation of the box 10, when the distance between the outer wall of the conical air deflector 40 and the inner wall of the rear speaker cover 32 is large to a certain extent, the lowest frequency of the sound waves with close phases will no longer increase. In order to balance the lowest frequency of the sound waves with close phases and the volume of the box 10, in the present embodiment, the distance between the outer wall of the conical air deflector 40 and the inner wall of the rear speaker cover 32 is half the inner diameter of the straight pipe 31.

[0029] To ensure the airflow introduction and export effects of the air duct 30, further, the rear opening diameter of the rear speaker cover 32 is twice the inner diameter of the straight tube 31, and the front opening diameter of the front speaker cover 32 is smaller than the rear opening diameter of the rear speaker cover 32, which is approximately 80% to 95% of the rear opening diameter of the rear speaker cover 32.

[0030] To facilitate supporting the air duct 30, in the present embodiment, a support plate 13 for supporting the straight tube 31 is provided in the box body 10, and the upper end surface of the support plate 13 is provided with a U-shaped groove 131 matching the outer wall of the straight tube 31; at the same time, a countersunk hole 14 for installing the front speaker cover 32 is provided on the front side surface of the box body 10, and the plane where the front opening of the front speaker cover 32 is located is flush with the front side surface of the box body 10.

[0031] To enhance the bass effect, in the present embodiment, there are two air ducts 30 , which are symmetrically distributed on both sides of the axis of the subwoofer 20 . Furthermore, the air ducts 30 are located below the subwoofer 20 .

[0032] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A small-volume bass speaker, comprising: A box body, wherein the interior of the box body is hollow; A subwoofer, wherein the subwoofer is embedded in the front side of the box, and the rear end of the subwoofer extends into the box; An air duct, the air duct vertically penetrates the front side of the box body and extends backward, the air duct includes a straight pipe, a front speaker cover connected to the front end of the straight pipe and opened forward and outward, and a rear speaker cover connected to the rear end of the straight pipe and opened backward and outward; Features: There is a gap between the rear speaker cover and the inner wall of the box body, and a conical air deflector is provided in the gap. The front end of the conical air deflector extends into the rear speaker cover, the rear end of the conical air deflector is in contact with the inner wall of the box body, and the outer wall of the conical air deflector is parallel to the inner wall of the rear speaker cover.

2. The small-volume bass speaker according to claim 1, characterized in that: The outer wall of the conical air guide cover is smoothly connected to the inner wall of the box.

3. The small-volume bass speaker according to claim 2, characterized in that: The inner wall of the box body is provided with a blind hole for embedding the conical air deflector, and the hole depth of the blind hole is greater than or equal to the wall thickness of the conical air deflector.

4. The small-volume bass speaker according to claim 3, characterized in that: The conical air deflector comprises a support column in the middle and an umbrella cover connected to the support column, the rear end face of the support column is pressed against the center of the blind hole, and the edge of the umbrella cover is embedded in the blind hole and flush with the hole edge of the blind hole.

5. The small-volume bass speaker box according to claim 1, characterized in that: The distance between the outer wall of the conical air deflector and the inner wall of the rear horn cover is half of the inner diameter of the straight pipe.

6. The small-volume bass speaker box according to claim 1, characterized in that: The rear opening diameter of the rear speaker cover is twice the inner diameter of the straight tube, and the front opening diameter of the front speaker cover is smaller than the rear opening diameter of the rear speaker cover.

7. The small-volume bass speaker box according to claim 1, characterized in that: A support plate for supporting the straight tube is provided in the box body, and a U-shaped groove matching the outer wall of the straight tube is provided on the upper end surface of the support plate.

8. The small-volume bass speaker box according to claim 1, characterized in that: The front side surface of the box body is provided with a countersunk hole for installing the front speaker cover, and the plane where the front opening of the front speaker cover is located is flush with the front side surface of the box body.

9. The small-volume bass speaker box according to claim 1, characterized in that: There are two air ducts, and the two air ducts are symmetrically distributed on both sides of the axis of the subwoofer.

10. The small-volume bass speaker box according to claim 1, characterized in that: The air guide duct is located below the subwoofer.

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