Sound cavity structure module with double loudspeakers and single air duct
By designing a dual-speaker, single-duct acoustic cavity structure module, the problems of unstable acoustic cavity structure and poor sound quality in projectors have been solved, achieving improved sound quality and structural stability, especially with significant improvements in low-frequency response and mid-to-high-frequency performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 音品电子(深圳)有限公司
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-24
AI Technical Summary
Existing projector acoustic cavity structures are unstable, resulting in poor sound quality, especially with severe distortion in low and mid-high frequencies, making it difficult to meet the demands for high-quality sound.
The module adopts a dual-speaker, single-duct acoustic cavity structure, including a first housing, a second housing, a duct plate, a first speaker, and a second speaker. The structural stability and sound quality are improved through symmetrical design and ultrasonic welding technology, and the connection between the duct plate and the speaker is used to cancel out sound wave interference.
It achieves improved sound quality, a more stable structure, reduced airflow turbulence and howling, better low-frequency response, and purer sound quality.
Smart Images
Figure CN224164895U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electronic device acoustic cavity technology, specifically relating to a dual-speaker single-duct acoustic cavity structure module. Background Technology
[0002] Projectors are widely used in daily life. The acoustic cavity structure of a projector is one of its key components. The acoustic cavity structure has functions such as shaping the sound wave propagation path, adjusting the frequency characteristics of the sound, enhancing the loudness of the sound, reducing sound distortion, and improving the timbre performance. The current trend in demand for projector acoustic cavity structures is to achieve better low-frequency reproduction, that is, to require a sufficiently low resonant frequency, low low-frequency and mid-high frequency distortion, and a sufficiently good mid-high frequency reproduction effect, resulting in purer and clearer sound quality. To achieve this effect, the projector acoustic cavity structure generally incorporates structures such as ducts. Ducts have advantages such as optimizing the airflow path, controlling airflow, adjusting the resonant frequency, and reducing acoustic reflection interference. However, existing acoustic cavity structures using a single duct are structurally unstable during use, and the overall sound quality of the acoustic cavity structure is poor. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a dual-speaker, single-duct acoustic cavity structure module with good sound quality and stable structure.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] The dual-speaker, single-duct acoustic cavity structure module includes:
[0006] First shell;
[0007] The second housing is fastened to the first housing and together with the first housing forms an installation cavity. A protrusion is provided on the upper part of the second housing, and a duct plate installation groove is provided in the protrusion. The first end of the duct plate installation groove is connected to the installation cavity, and the second end of the duct plate installation groove extends out of the protrusion. A notch is provided on the rear side of the first end of the duct plate installation groove.
[0008] The duct segment is adapted to and snapped onto the duct segment mounting groove. A connecting part is provided between the first end and the second end of the duct segment, and the connecting part is snapped into the notch groove.
[0009] The first speaker is located on the left side between the first housing and the second housing;
[0010] The second speaker is located on the right side between the first housing and the second housing and is symmetrically arranged with the first speaker.
[0011] And an electronic connector, the first end of which is connected to the first and second speakers, and the second end of which extends out of the first housing to the outside of the first housing.
[0012] Preferably, both the first and second ends of the duct segment are funnel-shaped.
[0013] Preferably, a first sealing EVA block is provided between the first speaker and the first housing and the second housing, and a second sealing EVA block is provided between the second speaker and the first housing and the second housing.
[0014] By adopting the above technical solution, this utility model has the following beneficial effects:
[0015] (1) This utility model is provided with a first speaker and a second speaker. The first speaker and the second speaker are symmetrically arranged. When used, the sound waves can be canceled out in the installation cavity to avoid howling and effectively improve the sound quality.
[0016] (2) This utility model is provided with a duct plate, the duct plate is adapted to the duct plate mounting groove, and a connecting part is provided between the first end and the second end of the duct plate. The setting of the connecting part can make the structure between the first end and the second end of the duct plate more stable and can effectively reduce the turbulence caused by airflow.
[0017] In summary, this utility model has advantages such as good sound quality and stable structure. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 yes Figure 1 A structural diagram showing the structure when the ductwork segments are removed.
[0020] The components include a first housing 1, a second housing 2, a duct plate 3, a first horn 4, a second horn 5, an electronic connector 6, a protrusion 7, a duct plate mounting groove 8, a notch groove 9, a connecting part 10, a first sealing EVA block 11, and a second sealing EVA block 12. Detailed Implementation
[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.
[0022] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.
[0023] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] Example 1
[0027] In this embodiment, a dual-speaker single-duct acoustic cavity structure module is proposed, which is suitable for use in electronic devices such as projectors. The overall structure is stable and the sound quality is good.
[0028] like Figure 1 and Figure 2As shown, in one embodiment of this utility model, the dual-speaker single-duct acoustic cavity structure module includes a first housing 1, a second housing 2, a duct piece 3, a first speaker 4, a second speaker 5, and an electronic connector 6. The second housing 2 is fastened to the first housing 1 and together with the first housing 1 forms an installation cavity. A protrusion 7 is provided on the upper part of the second housing 2, and a duct piece mounting groove 8 is provided within the protrusion 7. The first end of the duct piece mounting groove 8 communicates with the installation cavity, and the second end of the duct piece mounting groove 8 extends out of the protrusion 7. A notch 9 is provided rearward on the rear side of the first end of the duct piece mounting groove 8, specifically located on the protrusion 7. The duct piece 3... The duct 3 is adapted to and snapped onto the duct mounting groove 8. A connecting part 10 is provided between the first end and the second end of the duct 3. The connecting part 10 is snapped into the notch groove 9. After the duct 3 is snapped onto the duct mounting groove 8, the top surface of the duct 3 is flush with the top surface of the protrusion 7. Moreover, the duct 3 and the duct mounting groove 8 are ultrasonically welded, and the connecting part 10 and the notch groove 9 are also ultrasonically welded to improve the sealing performance. The first end and the second end of the duct 3 are both flared. The inner wall of the duct 3 and the inner wall of the duct mounting groove 8 are both smooth, which can reduce the turbulence and collision of airflow in the duct 3 and the duct mounting groove 8.
[0029] The first horn 4 of this invention is located on the left side between the first housing 1 and the second housing 2. A first sealing EVA block 11 is provided between the first horn 4 and the first housing 1 and the second housing 2. The second horn 5 is located on the right side between the first housing 1 and the second housing 2 and is symmetrically arranged with the first horn 4. A second sealing EVA block 12 is provided between the second horn 5 and the first housing 1 and the second housing 2. The first sealing EVA block 11 and the second sealing EVA block 12 can increase the sealing performance. The first housing 1 and the second housing 2 are also ultrasonically welded. The symmetrical design of the first horn 4 and the second horn 5 utilizes the phase cancellation principle to make the sound waves generated by the first horn 4 and the second horn 5 cancel each other out at a specific position in the mounting cavity, thereby avoiding howling. The first end of the electronic connector 6 of this invention is connected to the first horn 4 and the second horn 5, and the second end of the electronic connector 6 extends out of the first housing 1 and extends to the outside of the first housing 1.
[0030] In this utility model, the air duct segment 3 and the air duct segment mounting groove 8 are an overall extended structure similar to a bend, with the first end and the second end of the air duct segment 3 on the same side, that is... Figure 1On the left side, compared with the existing dual-duct plate 3 design, this application simplifies the structure, reduces costs, and maintains good sound quality. Moreover, the symmetrical arrangement of the first speaker 4 and the second speaker 5 can effectively reduce interference between sound waves, resulting in a better low-frequency response, more substantial low-frequency response, and stronger impact. Furthermore, the symmetrical design of the first speaker 4 and the second speaker 5 ensures that the air pressure and air damping around the first speaker 4 and the second speaker 5 are completely symmetrical, which helps to stabilize the cones of the first speaker 4 and the second speaker 5 during operation, improves the performance and service life of the first speaker 4 and the second speaker 5. This application adds a connecting part 10 between the first end and the second end of the duct plate 3 and connects them through a notch 9, which effectively increases the strength of the duct plate 3.
[0031] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.
Claims
1. A dual-horn single-wind-tube sound cavity structure module, characterized in that, include: First shell; The second housing is fastened to the first housing and together with the first housing forms an installation cavity. A protrusion is provided on the upper part of the second housing, and a duct plate installation groove is provided in the protrusion. The first end of the duct plate installation groove is connected to the installation cavity, and the second end of the duct plate installation groove extends out of the protrusion. A notch is provided on the rear side of the first end of the duct plate installation groove. The duct segment is adapted to and snapped onto the duct segment mounting groove. A connecting part is provided between the first end and the second end of the duct segment, and the connecting part is snapped into the notch groove. The first speaker is located on the left side between the first housing and the second housing; The second speaker is located on the right side between the first housing and the second housing and is symmetrically arranged with the first speaker. And an electronic connector, the first end of which is connected to the first and second speakers, and the second end of which extends out of the first housing to the outside of the first housing.
2. The dual-horn single-wind-tube acoustic cavity structure module according to claim 1, wherein: Both the first and second ends of the duct segment are funnel-shaped.
3. The dual-horn single-wind-tube acoustic cavity structure module according to claim 1, wherein: A first sealing EVA block is provided between the first speaker and the first housing and the second housing, and a second sealing EVA block is provided between the second speaker and the first housing and the second housing.