Sound box air pipe and sound box

Abstract

The utility model discloses a sound box air pipe and sound box wherein the sound box air pipe is a double-layer hollow pipe body with both ends blocked, and comprises an air inlet pipeline, a bending pipeline and an air outlet pipeline, the air inlet pipeline and the air outlet pipeline are respectively arranged at both ends of the bending pipeline, the air inlet pipeline, the bending pipeline and the air outlet pipeline are integrally formed, and the bending pipeline is arranged on the bending pipeline. The end, away from the bent pipeline, of the air inlet pipeline is the rear end of the air inlet pipeline, the end, away from the bent pipeline, of the air outlet pipeline is the front end of the air outlet pipeline, the inner wall and the outer wall of the double-layer hollow pipe body are connected through a wavy connecting piece, and the space between the inner wall and the outer wall is filled with a noise reduction agent. The sound box air pipe is designed into the double-layer hollow pipe body with the two ends blocked, the inner wall and the outer wall of the double-layer hollow pipe body are connected through the wavy connecting piece, the wavy connecting piece is beneficial to improving the stability between the inner wall and the outer wall of the sound box air pipe, and noise can be reduced by filling the noise reduction agent between the inner wall and the outer wall.

Description

Technical Field

[0001] The utility model relates to the technical field of audio-visual equipment, in particular to a sound box air duct and a sound box. Background Art

[0002] In order to pursue high-efficiency bass, existing speakers are usually equipped with air ducts connecting the inside and outside of the box. The air duct is also called a phase inversion duct, which can make the sound quality cleaner when the bass of the sound is boosted. The principle is that when the speaker is working, the diaphragm will move back and forth continuously, pushing the air, thereby transmitting the vibration to the human ear, so that people can hear the sound. The speaker air duct exposes the speaker diaphragm to the outside to make sound, and the rear of the speaker will also vibrate. If the vibration of the speaker to the rear is also utilized, the sound wave will be strengthened and the bass efficiency will be improved. However, when the existing speaker air duct is in use, due to the imbalance of air pressure inside and outside the speaker, air flow will flow in the air duct. The air flow rubs and vibrates with the inner wall of the air duct, causing the air duct to generate noise and interfere with the sound originally emitted by the speaker of the speaker, thereby reducing the quality of the sound. Therefore, at this stage, there is an urgent need for an air duct that can reduce noise or noise to solve the interference problem caused by the existing technology. Utility Model Content

[0003] In order to solve the above technical problems, the embodiment of the present application provides a sound box air duct, which adopts the following technical solution:

[0004] A speaker air duct, which is a double-layer hollow tube body with both ends blocked, comprises an air inlet duct, a curved duct and an air outlet duct, the air inlet duct and the air outlet duct are respectively arranged at the two ends of the curved duct, the air inlet duct, the curved duct and the air outlet duct are integrally formed, the end of the air inlet duct away from the curved duct is the rear end of the air inlet duct, the end of the air outlet duct away from the curved duct is the front end of the air outlet duct, the inner wall and the outer wall of the double-layer hollow tube body are connected by a wavy connecting piece, and the space between the inner wall and the outer wall is filled with a noise reducer.

[0005] Preferably, the noise reducer is composed of low-density polyurethane foam balls, rubber balls, foam glass balls, and foamed silicone balls. Designing the sound-absorbing material into a spherical shape can reduce the void ratio, and can also avoid local stress concentration and disperse the pressure on the local part of the air duct.

[0006] Preferably, the curved pipe is an arc-shaped pipe, and the curvature is 80°≤curvature≤130°. The larger the curvature, the more conducive it is to reducing the turbulence of the airflow, but at the same time, the volume of the speaker needs to be taken into consideration. If the curvature is too large, a larger speaker is required to accommodate the speaker air duct. Therefore, a curved pipe with a curvature within this range can meet the design requirements to the greatest extent.

[0007] Preferably, the rear end of the air inlet duct is open. The open design is conducive to the introduction of air.

[0008] Preferably, the front end of the air outlet duct is trumpet-shaped. The trumpet-shaped air outlet duct can make the air flow diffuse more smoothly, help absorb and dissipate sound waves, and thus reduce echo and resonance effects.

[0009] Preferably, a dustproof net is also provided at the rear end entrance of the air inlet duct, and the dustproof net is used to prevent dust and foreign objects from falling into the cavity of the speaker, thereby extending the service life of the speaker.

[0010] Preferably, the cross-sections of the air inlet duct and the air outlet duct are both circular or elliptical. This design can make the airflow in the duct more stable and smooth, reduce the friction between the airflow and the inner wall of the duct, and thus reduce noise.

[0011] In order to solve the above technical problems, the embodiment of the present application further provides a speaker, which adopts the following technical solution:

[0012] A sound box comprises a front cover, a rear cover, a speaker and the above-mentioned sound box air duct, the front cover and the rear cover cooperate to form a cavity, the outer edge of the speaker is arranged on the front cover, the outer edge of the air inlet duct is arranged on the rear cover, the back of the speaker, the air inlet duct, the curved duct and the air outlet duct are all located in the cavity, the rear cover of the speaker is provided with an integrally formed cylindrical hollow duct on one side of the cavity, one end of the cylindrical hollow duct is connected to the outside, and the other end is inserted into the rear end of the air inlet duct, a plurality of anti-foolproofing positions are circumferentially arranged on the inner wall at the rear end of the air inlet duct, a plurality of anti-foolproofing protrusions matching with the anti-foolproofing positions are circumferentially arranged on the outer wall of the cylindrical hollow duct, and an adhesive is filled at the connection between the cylindrical hollow duct and the rear end of the air inlet duct.

[0013] Preferably, a first lip is provided on the opening edge of the front cover of the speaker, a second lip matching the first lip is provided on the opening edge of the rear cover of the speaker, and adhesive is filled between the first lip and the second lip.

[0014] Preferably, the front cover of the speaker is provided with a mounting groove on one side of the cavity, and the mounting groove is used for mounting the speaker.

[0015] The beneficial effect is that the present application first improves the speaker duct, designs the speaker duct into a double-layer hollow tube body with both ends blocked, and the inner wall and outer wall of the double-layer hollow tube body are connected by a wavy connecting piece, which is conducive to increasing the stability between the inner wall and the outer wall of the speaker duct, and filling the noise reducer between the inner wall and the outer wall can reduce noise or noise. When the speaker duct is installed on the speaker, a plurality of foolproof positions are arranged along the circumferential direction on the inner wall at the rear end of the air inlet duct, and a plurality of foolproof protrusions are arranged along the circumferential direction on the outer wall of the cylindrical hollow duct that match the foolproof positions, so as to improve the stability of the speaker duct fixed on the back cover of the speaker. In order to further improve the sealing and structural strength, an adhesive is filled at the connection between the cylindrical hollow duct and the rear end of the air inlet duct, so that the speaker duct can be more stably fixed on the speaker, thereby reducing noise or noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 This is a cross-sectional view of the speaker duct;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the speaker back cover structure;

[0020] In the figure:

[0021] 1. Speaker front cover;

[0022] 2. Speaker back cover; 21. Cylindrical hollow pipe; 211. Anti-fool protrusion;

[0023] 3. Speaker;

[0024] 4. Speaker air duct; 41. Air inlet duct; 411. Dust-proof net; 412. Anti-foolproof positioning; 42. Bent duct; 43. Air outlet duct. DETAILED DESCRIPTION

[0025] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0026] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Example 1

[0029] See also Figure 1 , Figure 1It is a cross-sectional view of the speaker duct. This embodiment provides a speaker duct, which is a double-layer hollow tube body with both ends blocked, with a length of 8 to 15 mm, including an air inlet duct 41, a curved duct 42 and an air outlet duct 43. The curved duct 42 is an arc-shaped duct, and 80°≤radian≤130°. The larger the curvature, the more conducive it is to reducing the turbulence of the airflow, but at the same time, the volume of the speaker needs to be taken into account. If the curvature is too large, a larger speaker is required to accommodate the speaker duct. Therefore, the curved duct within this range can meet the design requirements to the greatest extent. The cross-sections of the air inlet duct 41 and the air outlet duct 43 are both circular or elliptical, which can make the airflow in the duct more stable and smooth, reduce the friction between the airflow and the inner wall of the duct, and thus reduce noise. The air inlet duct 41 and the air outlet duct 43 are respectively arranged at the two ends of the curved duct 42, and the air inlet duct 41, the curved duct 42 and the air outlet duct 43 are integrally formed. The end of the air inlet duct 41 away from the curved duct 42 is the rear end of the air inlet duct, and the rear end of the air inlet duct is open. The open design is conducive to the introduction of air. The end of the air outlet duct 43 away from the curved duct 42 is the front end of the air outlet duct. The front end of the air outlet duct is horn-shaped. The horn-shaped air outlet duct can make the air flow diffuse more smoothly, which helps to absorb and dissipate sound waves, thereby reducing echo and resonance effects. The inner wall and the outer wall of the double-layer hollow tube body are connected by a wavy connecting piece. The inner wall and the outer wall are filled with a noise reducer. The noise reducer is composed of low-density polyurethane foam balls, rubber balls, foam glass balls, and foamed silicone balls. Of course, the sizes of these spherical sound-absorbing materials can be the same or different, preferably large and small so as to improve the filling rate. Of course, the shapes of these sound-absorbing materials are not limited to spherical shapes, and can also be square, triangular, etc. Designing the sound-absorbing material into a spherical shape can reduce the void ratio, and can also avoid local stress concentration and disperse the pressure on the local part of the air duct. A dust screen 411 is also provided at the rear entrance of the air inlet duct, and the dust screen 411 is used to prevent dust and foreign matter from falling into the speaker cavity, thereby extending the service life of the speaker. In this embodiment, the speaker air duct is improved by designing the speaker air duct into a double-layer hollow tube body with both ends blocked, and the inner wall and the outer wall of the double-layer hollow tube body are connected by a wavy connecting piece, which is conducive to increasing the stability between the inner wall and the outer wall of the speaker air duct, and filling a noise reducer between the inner wall and the outer wall can reduce noise or noise.

[0030] Example 2

[0031] See also Figure 2 , Figure 2This is a schematic diagram of the cross-sectional structure of the utility model. This embodiment provides a speaker comprising a speaker front cover 1, a speaker rear cover 2, a speaker 3 and the above-mentioned speaker air duct 4, the speaker front cover 1 is provided with a first lip at the opening edge, the speaker rear cover 2 is provided with a second lip that matches the first lip at the opening edge, the speaker front cover 1 and the speaker rear cover 2 cooperate to form a cavity, and an adhesive is filled between the first lip and the second lip. A mounting groove is provided on one side of the cavity of the speaker front cover 1, and the outer edge of the speaker 3 is installed in the mounting groove. The outer edge of the air inlet duct 41 is provided on the speaker rear cover 2, and the back of the speaker 3, the air inlet duct 41, the curved duct 42 and the air outlet duct 43 are all located in the cavity. An integrally formed cylindrical hollow duct 21 is provided on one side of the cavity of the speaker rear cover 2, and one end of the cylindrical hollow duct 21 is connected to the outside, and the other end is inserted into the rear end of the air inlet duct 41. A plurality of anti-foolproofing positions 412 are circumferentially provided on the inner wall of the rear end of the air inlet duct, and a plurality of anti-foolproofing protrusions 211 matching the anti-foolproofing positions 412 are circumferentially provided on the outer wall of the cylindrical hollow duct 21, and an adhesive is filled at the connection between the cylindrical hollow duct 21 and the rear end of the air inlet duct. When the speaker air duct 4 is installed on the speaker, a plurality of anti-foolproofing positions 412 are circumferentially arranged on the inner wall at the rear end of the air inlet duct, and a plurality of anti-foolproofing protrusions 211 matching the anti-foolproofing positions 412 are circumferentially arranged on the outer wall of the cylindrical hollow pipe 21, thereby improving the stability of the speaker air duct 4 fixed to the speaker back cover 2. In order to further improve the sealing and structural strength, adhesive is filled at the connection between the cylindrical hollow pipe 21 and the rear end of the air inlet duct, so that the speaker air duct can be more stably fixed on the speaker, thereby reducing murmurs or noise.

[0032] In summary, the present application achieves the technical effect of reducing murmurs or noise by improving the structure and installation method of the speaker air duct.

[0033] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A sound box air duct, characterized in that: The double-layer hollow tube body is sealed at both ends, and comprises an air inlet duct (41), a curved duct (42) and an air outlet duct (43); the air inlet duct (41) and the air outlet duct (43) are respectively arranged at the two ends of the curved duct (42); the air inlet duct (41), the curved duct (42) and the air outlet duct (43) are integrally formed; the end of the air inlet duct (41) away from the curved duct (42) is the rear end of the air inlet duct; the end of the air outlet duct (43) away from the curved duct (42) is the front end of the air outlet duct; the inner wall and the outer wall of the double-layer hollow tube body are connected by a wavy connecting piece; and a noise reducing agent is filled between the inner wall and the outer wall.

2. The speaker air duct according to claim 1, characterized in that: The noise reducer consists of low-density polyurethane foam balls, rubber balls, foam glass balls and foamed silica gel balls.

3. The sound box air duct according to claim 2, characterized in that: The curved pipe (42) is an arc-shaped pipe, and the arc angle is 80°≤130°.

4. The sound box air duct according to claim 1, characterized in that: The rear end of the air inlet duct is open.

5. The sound box air duct according to claim 1, characterized in that: The front end of the air outlet duct is in a trumpet shape.

6. The sound box air duct according to claim 1, characterized in that: A dustproof net (411) is also provided at the rear end entrance of the air inlet duct, and the dustproof net (411) is used to prevent dust and foreign matter from falling into the cavity of the sound box.

7. The sound box air duct according to claim 1, characterized in that: The cross-sections of the air inlet duct (41) and the air outlet duct (43) are both circular or elliptical.

8. A sound box, characterized in that: The speaker comprises a front cover (1), a rear cover (2), a speaker (3), and a speaker duct (4) as claimed in any one of claims 1 to 7, wherein the front cover (1) and the rear cover (2) cooperate to form a cavity, the outer edge of the speaker (3) is arranged on the front cover (1), the outer edge of the air inlet duct (41) is arranged on the rear cover (2), the back of the speaker (3), the air inlet duct (41), the curved duct (42) and the air outlet duct (43) are all located in the cavity, and the rear cover (2) is provided at the bottom of the speaker (3). An integrally formed cylindrical hollow pipe (21) is provided on one side of the cavity; one end of the cylindrical hollow pipe (21) is connected to the outside, and the other end is inserted into the rear end of the air inlet pipe (41); a plurality of fool-proofing positions (412) are circumferentially arranged on the inner wall of the rear end of the air inlet pipe; a plurality of fool-proofing protrusions (211) matching the fool-proofing positions (412) are circumferentially arranged on the outer wall of the cylindrical hollow pipe (21); and an adhesive is filled at the connection between the cylindrical hollow pipe (21) and the rear end of the air inlet pipe.

9. The speaker according to claim 8, characterized in that: The opening edge of the speaker front cover (1) is provided with a first lip, and the opening edge of the speaker rear cover (2) is provided with a second lip that matches the first lip, and an adhesive is filled between the first lip and the second lip.

10. The speaker according to claim 8, characterized in that: The speaker front cover (1) is provided with a mounting groove on one side of the cavity, and the mounting groove is used for mounting a speaker (3).

Images