Anti-crossing structure at the speaker wire crossing

Abstract

This utility model relates to a cavity-based anti-leakage structure for a loudspeaker cable passage, comprising a loudspeaker driver, a panel, and a rear shell. The loudspeaker driver is disposed inside the panel. The panel also has a cavity, through which the connecting wire of the loudspeaker driver passes. A circular hole is provided on the rear shell corresponding to the cavity. The rear shell and panel are ultrasonically sealed after the circular hole aligns with the cavity, and the circular hole contains sealing adhesive. This utility model uses ultrasonic welding to completely eliminate the risk of air leakage at the joint surface of the partition; external adhesive injection directly seals the wire perforation, eliminating the air leakage channel; and the adhesive injection location is exposed, allowing direct visual inspection of the adhesive filling state, avoiding hidden defects; at the same time, precise external adhesive injection significantly reduces the amount of adhesive used, eliminating the internal adhesive application process and simplifying the assembly process; thus significantly improving the airtightness of the cavity, ensuring that low-frequency response and distortion control meet acoustic design requirements.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a cavity anti-cross-flow structure at the wire passage of a loudspeaker. Background Technology

[0002] In a multi-chamber speaker design, speaker wires need to pass through partitions to achieve electrical connections. To prevent air from flowing between different acoustic chambers through the wire perforations (i.e., "air leakage"), traditional methods typically involve manually filling the gaps between the wires and the partition perforations with sealant.

[0003] However, traditional techniques have the following drawbacks:

[0004] 1. Low sealing reliability: Manual application of glue is prone to insufficient glue amount or incomplete accumulation, resulting in air leakage through micro gaps, which damages the independence of the acoustic chamber and causes problems such as low-frequency acoustic short circuit and frequency response distortion.

[0005] 2. Difficult to control quality: The glue filling state is hidden inside the cavity, making it impossible to visually inspect the integrity of the seal;

[0006] 3. High cost: To ensure sealing, excessive glue needs to be applied, resulting in a large amount of glue used and a long curing time. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a cavity anti-cross-flow structure at the speaker wire passage, which solves the problems of low sealing reliability, difficult quality control and high cost in traditional processes.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a cavity anti-crossing structure for a speaker wire passage, including a speaker unit, a panel, and a back shell; the speaker unit is disposed inside the panel; the panel is also provided with a bread-shaped cavity, and the connecting wire of the speaker unit passes through the bread-shaped cavity; a circular hole is provided on the back shell corresponding to the position of the bread-shaped cavity; the back shell and the panel are ultrasonically sealed after the circular hole and the bread-shaped cavity are aligned, and the circular hole contains a sealing adhesive.

[0009] Furthermore, the bread cavity of this invention has a guide groove, and the connecting line passes through the guide groove.

[0010] Furthermore, the inner side of the panel of this utility model is also provided with a wiring groove, and the connecting wire passes through the wiring groove and the bread cavity in sequence.

[0011] Furthermore, the wiring channel described in this invention is located above the bread compartment.

[0012] Furthermore, the circular hole of this utility model has an upper edge and a lower edge; the upper edge has a downward bevel; and the lower edge is connected to the upper part of the bread cavity.

[0013] The beneficial effect of this utility model is that it solves the defects existing in the background technology.

[0014] Ultrasonic welding completely eliminates the risk of air leakage at the joint surface of the partition; external glue injection directly seals the wire perforations, eliminating air leakage channels; and the glue injection position is exposed, allowing direct visual inspection of the glue filling status to avoid hidden defects; at the same time, precise external glue injection significantly reduces the amount of glue used, eliminates the internal glue application process, and simplifies the assembly process; thus significantly improving the airtightness of the chamber and ensuring that the low-frequency response and distortion control meet the acoustic design requirements. Attached Figure Description

[0015] Figure 1 This is an exploded view of the structure of this utility model;

[0016] Figure 2 This is a partial sectional view of the bread cavity and the circular hole connection structure of this utility model;

[0017] In the diagram: 1. Front panel; 2. Speaker unit; 3. Rear shell; 4. Bread-shaped cavity; 5. Connecting wire; 6. Round hole; 7. Guide groove; 8. Wiring groove; 9. Top edge; 10. Bottom edge; 11. Bevel. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] like Figure 1 The speaker cable isolation cavity anti-crossing structure shown includes a speaker driver 2, a panel 1, and a rear shell 3; the speaker driver 2 is disposed inside the panel 1; the panel 1 is also provided with a bread-shaped cavity 4, and the connecting wire 5 of the speaker driver 2 passes through the bread-shaped cavity 4; the rear shell 3 is provided with a circular hole 6 corresponding to the position of the bread-shaped cavity 4; the rear shell 3 and the panel 1 are ultrasonically sealed after the circular hole 6 and the bread-shaped cavity 4 are aligned, and the circular hole 6 contains a sealing adhesive.

[0020] The bread-shaped cavity 4 has a guide groove 7 through which the connecting wire 5 passes. The width of the guide groove 7 is slightly larger than the diameter of the connecting wire 5 (e.g., 1.5-2 mm wide), and its function is to precisely position the connecting wire 5 in the center of the cavity, preventing it from moving freely within the cavity. The bottom of the guide groove 7 is preferably designed as an arc-shaped recess (R angle ≥ 0.5 mm) to further reduce local pressure on the connecting wire 5. The entrance end of the bread-shaped cavity 4 (the end near the cable tray 8) may have a guide slope of about 45° to facilitate the smooth transition of the connecting wire 5 from the cable tray 8 into the guide groove 7.

[0021] A wiring channel 8 is also provided on the inner side of the panel 1, located above the bread-shaped cavity 4. The cross-sectional shape of the wiring channel 8 is preferably U-shaped or semi-circular, and its depth is designed to accommodate the connecting wire 5, for example, 1.5-2 times the diameter of the connecting wire 5 (e.g., 1.5-2 mm deep), and its width is slightly larger than the diameter of the connecting wire 5 (e.g., 3-4 mm wide). The edges of the channel opening need to be rounded (R angle ≥ 0.5 mm) to avoid scratching the insulation layer of the connecting wire 5. After the connecting wire 5 is led out from the speaker unit 2, it is first guided and partially embedded in this wiring channel 8.

[0022] The circular hole 6 has an upper edge 9 and a lower edge 10; the upper edge 9 has a downward bevel 11 (i.e., an inner chamfer); the lower edge 10 connects to the upper part of the bread cavity 4. The diameter of the circular hole 6 should be slightly larger than the opening size at the top of the bread cavity 4, forming a fitting gap of 0.1-0.3 mm between them to ensure assembly accuracy and provide space for subsequent sealing. The angle of the bevel 11 is preferably between 30° and 45° (e.g., 35°). The main functions of the bevel 11 are: first, to guide the subsequently injected sealing adhesive towards the center of the circular hole 6; second, to increase the contact area between the adhesive and the back shell 3; and third, to form an overflow buffer zone, so that a small amount of overflowing adhesive forms a smooth rounded corner rather than a burr. The lower edge 10 may be provided with a small annular boss with a height of about 0.2-0.3 mm. This boss forms a certain mechanical fitting relationship with the plane or corresponding structure at the top of the bread cavity 4 during assembly, which helps to improve the sealing reliability.

[0023] The ultrasonic sealing layer forms the first core sealing barrier at the wire crossing point, effectively preventing crosstalk between the gas (sound waves) between the front cavity (panel 1 side) and the rear cavity (rear shell 3 side) of the speaker through the path of the connecting wire 5 (i.e., preventing crosstalk). The sealing colloid forms the second core sealing barrier, which not only completely seals any microscopic gaps that may exist between the connecting wire 5 and the surrounding structure, but also buffers wire vibration and further enhances the airtightness of the entire cavity.

[0024] The assembly steps are as follows:

[0025] 1. Lead the connecting wire 5 out from the speaker unit 2.

[0026] 2. Embed the connecting wire 5 into the wiring groove 8 inside the panel 1.

[0027] 4. Guide the connecting wire 5 through the guide ramp and pass it through the guide groove 7 at the bottom of the bread compartment 4.

[0028] 5. Align the back cover 3 with the front panel 1 and fasten it, ensuring that the round hole 6 on the back cover 3 precisely covers the bread cavity 4 on the front panel 1, and that the lower edge 10 of the round hole 6 is in good contact with the top edge of the bread cavity 4.

[0029] 6. Apply ultrasonic energy to the annular area corresponding to the circular hole 6 and the bread cavity 4 to melt the plastic material of the back shell 3 and the panel 1 to form a continuous welded edge.

[0030] 7. Inject liquid silicone rubber (sealing colloid) into the fused and sealed wire-passing cavity through the round hole 6 until the colloid fills the cavity and slightly overflows the bevel 11 of the upper edge 9 of the round hole 6 (forming a smooth colloid convex surface).

[0031] 8. Let stand until the adhesive has completely cured.

[0032] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the description without departing from the essence and scope of the utility model.

Claims

1. A cavity-based anti-cross-flow structure at the speaker wire passage, characterized in that: The device includes a speaker unit (2), a panel (1), and a back cover (3); the speaker unit (2) is disposed inside the panel (1); the panel (1) is also provided with a bread cavity (4), and the connecting wire (5) of the speaker unit (2) passes through the bread cavity (4); the back cover (3) is provided with a round hole (6) corresponding to the position of the bread cavity (4); the back cover (3) and the panel (1) are ultrasonically sealed after the position of the round hole (6) and the bread cavity (4) are aligned, and the round hole (6) contains a sealing adhesive.

2. The anti-cross-flow structure at the speaker wire passage as described in claim 1, characterized in that: The bread compartment (4) has a guide groove (7), and the connecting line (5) passes through the guide groove (7).

3. The anti-cross-flow structure at the speaker wire passage as described in claim 1, characterized in that: The inner side of the panel (1) is also provided with a wiring groove (8), and the connecting wire (5) passes through the wiring groove (8) and the bread cavity (4) in sequence.

4. The anti-cross-flow structure at the speaker wire passage as described in claim 3, characterized in that: The wiring groove (8) is located above the bread cavity (4).

5. The anti-cross-flow structure at the speaker wire passage as described in claim 1, characterized in that: The circular hole (6) has an upper edge (9) and a lower edge (10); the upper edge (9) has a downward bevel (11); the lower edge (10) is connected to the upper part of the bread cavity (4).

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