An active sound box with a PCBA board front end sealing structure

Abstract

The utility model discloses a kind of active speaker with PCBA board front end sealing structure, the active speaker includes speaker shell, PCBA control panel, speaker iron back plate, sealing structure, the speaker iron back plate is fixed in the rear of speaker shell, the PCBA control panel is installed in the inside of speaker shell, the bottom of the sealing structure is installed in the front end of PCBA control panel, the sealing structure includes sealing cover and fastener, a layer EVA rubber pad is pasted on the first outer edge and second outer edge of the sealing cover, the sealing cover cover is equipped in the front end of PCBA control panel and the bottom of sealing cover is fixed in the front end of PCBA control panel by fastener, the second outer edge of the sealing cover side wall is abutted to the inside of speaker iron back plate. The utility model is by setting sealing cover in the front end of PCBA control panel, sealing cover and PCBA control panel are assembled into integral frame, it is favorable to promote the anti-shock performance of PCBA control panel, prevent airflow impact to the electronic element of PCBA control panel.

Description

Technical Field

[0001] This utility model relates to the field of speaker PCBA board technology, specifically to an active speaker with a front-end sealing structure of the PCBA board. Background Technology

[0002] A speaker typically consists of a speaker enclosure and a PCBA (Printed Circuit Board Assembly) board housed within the enclosure. The PCBA board primarily amplifies the input signal from the audio source, generating a sufficient current to drive the speaker for sound reproduction. The PCBA board is a crucial component of the speaker enclosure, usually fixed inside. An opening is located on the front or rear panel of the enclosure. RCA connectors, optical fiber connectors, USB connectors, and HDMI connectors are soldered to the front of the PCBA board, extending outwards from the openings in the front or rear panel. Existing speaker structures have the following shortcomings in practical use:

[0003] 1) PCBA boards are usually directly exposed in the internal cavity area of ​​the speaker cabinet. When the speaker plays audio, airflow will be generated inside the speaker cabinet. Especially when the speaker is working at maximum power and playing low frequency signals, violent airflow will be generated inside the speaker cabinet. These violent, high-speed, and turbulent airflow impacts will cause the PCBA board to produce unexpected flutter or vibration, producing abnormal flutter, affecting the sound quality and lifespan of the speaker.

[0004] 2) The intense airflow generated inside the speaker cabinet has a more significant impact on the relatively thin and long cantilevered interface area at the front of the PCBA board. This intense airflow will impact the front interface of the PCBA board, such as RCA connectors, optical fiber connectors, and USB connectors, which can easily cause the solder joints of RCA connectors, optical fiber connectors, USB connectors, and HDMI connectors at the front of the PCBA control board to loosen. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an active speaker that has a sealing cover at the front end of the PCBA control board, the sealing cover and the PCBA control board are assembled into an integral frame, which enhances the strength and anti-turbulence (anti-vibration) capability of the PCBA control board, prevents the airflow inside the speaker housing from running wild, protects the front end of the PCBA control board, and prevents airflow from impacting the electronic components at the front end of the PCBA control board.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An active speaker with a front-end sealing structure for a PCBA board is disclosed. The active speaker includes a speaker housing, a PCBA control board, a rear metal plate, and a sealing structure. The rear metal plate is fixed to the rear of the speaker housing. The PCBA control board is installed inside the speaker housing and on the inner side of the rear metal plate. The bottom of the sealing structure is installed at the front end of the PCBA control board so that the sealing structure covers the front end of the PCBA control board. The sidewall of the sealing structure abuts against the inner side of the rear metal plate. The sealing structure includes a sealing... The sealing cover and fasteners are provided. The PCBA control board is provided with fixing holes that cooperate with the fasteners. The bottom and sidewall of the sealing cover are respectively formed with a first outer edge and a second outer edge. An EVA pad is attached to both the first outer edge and the second outer edge of the sealing cover. The sealing cover is placed on the front end of the PCBA control board and the bottom of the sealing cover is fixed to the front end of the PCBA control board by the fasteners so that the EVA pad of the first outer edge of the sealing cover is in contact with the PCBA control board. The second outer edge of the sidewall of the sealing cover abuts against the inner side of the speaker's rear iron plate.

[0008] Furthermore, the sealing cover is provided with a plurality of connecting posts, which are spaced apart from each other along the vertical direction of the sealing cover. Each connecting post is provided with a fastening hole that mates with a fastener. The fastener passes through the fixing hole of the PCBA control board and the fastening hole of the connecting post on the sealing cover to fix the sealing cover to the front end of the PCBA control board.

[0009] Furthermore, the EVA pads adhered to the first and second outer edges of the sealing cover have a thickness of 1 mm.

[0010] Furthermore, the PCBA control board includes an RCA connector, an earphone connector, and a network connector. The RCA connector, earphone connector, and network connector are sequentially and alternately soldered to the front end of the PCBA control board from left to right. The first outer edge of the bottom end of the sealing cover is fixed to the front end of the PCBA control board so that the sealing cover covers the outer periphery of the RCA connector, earphone connector, and network connector at the front end of the PCBA control board. The first outer edge of the bottom end of the sealing cover is fixed to the front end of the PCBA control board by fasteners so that the sealing cover covers the outer periphery of the RCA connector, earphone connector, and network connector at the front end of the PCBA control board. The front end of the PCBA control board is installed on the inner side of the speaker's rear metal plate.

[0011] Furthermore, the speaker's rear metal plate is provided with a first mounting hole, a second mounting hole, a first connector that mates with the first mounting hole, and a second connector that mates with the second mounting hole. The top of the RCA connector is provided with a first connecting hole that mates with the first connector, and the top of the network connector is provided with a second connecting hole that mates with the second connector. The front end of the PCBA control board passes through the first mounting hole and the first connecting hole of the RCA connector in sequence through the first connector to fix the RCA connector at the front end of the PCBA control board to the speaker's rear metal plate. The PCBA control board passes through the second mounting hole and the second connecting hole of the network connector in sequence through the second connector to fix the network connector at the front end of the PCBA control board to the inner side of the speaker's rear metal plate. The front end of the PCBA control board is installed on the inner side of the speaker's rear metal plate through the RCA connector, the headphone connector, and the network connector.

[0012] Furthermore, the speaker enclosure rear plate is also provided with a third mounting hole and a third connector that mates with the third mounting hole. The front end of the PCBA control board is fixed with a mounting base, which is located on one side of the sealing cover. The middle part of the mounting base is provided with a third connecting hole that mates with the third connector. The third mounting hole, the first mounting hole, and the second mounting hole are distributed sequentially from left to right along the speaker enclosure rear plate and correspond to the positions of the first connecting hole of the RCA connector, the second connecting hole of the network connector, and the third connecting hole in the middle of the mounting base, respectively. The mounting base at the front end of the PCBA control board passes through the third mounting hole of the speaker enclosure rear plate and the third connecting hole of the mounting base in sequence through the third connector so that the mounting base at the front end of the PCBA control board is fixed to the speaker enclosure rear plate.

[0013] Furthermore, the sealing cover includes a first plastic mold and a second plastic mold, with one end of the first plastic mold fixed to one end of the second plastic mold.

[0014] Furthermore, the length of the first plastic mold is greater than the length of the second plastic mold.

[0015] Furthermore, the speaker cabinet's iron rear plate has threaded holes and fixing bolts that mate with the threaded holes on its four periphery. The speaker cabinet's iron rear plate is installed at the rear of the speaker cabinet by passing the fixing bolts through the threaded holes on its four periphery.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The active speaker of this utility model includes a speaker housing, a PCBA control board, a speaker rear plate, and a sealing structure. The speaker rear plate is fixed to the rear of the speaker housing. The PCBA control board is installed inside the speaker housing and on the inner side of the speaker rear plate. The bottom of the sealing structure is installed at the front end of the PCBA control board so that the sealing structure covers the front end of the PCBA control board. The side wall of the sealing structure abuts against the inner side of the speaker rear plate. The sealing structure includes a sealing cover and fasteners. The PCBA control board is provided with fixing holes that cooperate with the fasteners. The bottom and side wall of the sealing cover are respectively formed with a first outer edge and a second outer edge. A layer of EVA rubber gasket is pasted on both the first and second outer edges of the sealing cover. The sealing cover is placed on the front end of the PCBA control board, and the bottom of the sealing cover is fixed to the front end of the PCBA control board by the fasteners so that the EVA rubber gasket on the first outer edge of the sealing cover is in contact with the PCBA control board. The second outer edge of the side wall of the sealing cover abuts against the inner side of the speaker rear plate. This invention improves the shock resistance of the PCBA control board by setting a sealing cover at the front end of the board and assembling the sealing cover and the PCBA control board into an integral frame. This increases the strength and anti-turbulence (shock resistance) capability of the PCBA control board, prevents airflow from running wild inside the speaker housing, and prevents airflow from impacting the electronic components of the PCBA control board. It also provides a certain degree of protection for the electronic components at the front end of the PCBA control board and can extend the service life of the active speaker. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the active speaker of this utility model;

[0019] Figure 2 This is a schematic diagram showing the relationship between the sealing structure of this utility model and the PCBA control board and the rear iron plate of the speaker.

[0020] Figure 3 This is an exploded structural diagram showing the relationship between the sealing structure of this utility model and the PCBA control board and the rear iron plate of the speaker.

[0021] Figure 4 This diagram illustrates the relationship between the sealing structure of this utility model and the PCBA control board. Figure 1 ;

[0022] Figure 5 This diagram illustrates the relationship between the sealing structure of this utility model and the PCBA control board. Figure 2 ;

[0023] Figure 6 This diagram illustrates the relationship between the sealing structure of this utility model and the PCBA control board. Figure 3 ;

[0024] Figure 7This is a schematic diagram of the sealing cover of this utility model.

[0025] In the diagram, the components are: speaker housing 1, sealing structure 2, sealing cover 21, connecting post 211, fixing hole 212, EVA pad 213, first plastic mold 214, second plastic mold 215, first outer edge 216, second outer edge 217, fastener 22, PCBA control board 3, RCA socket 31, first connecting hole 311, audio signal input connector 312, audio signal output connector 313, headphone socket 32, headphone connector 321, network connector 33, second connecting hole 331, network connector 332, fixing seat 34, third connecting hole 341, speaker back plate 4, first mounting hole 41, second mounting hole 42, third mounting hole 43, first opening 44, second opening 45, third opening 46, fourth opening 47, first connector 48, second connector 49, third connector 410, fixing bolt 411, and threaded hole 412. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1-7This utility model provides an active speaker with a front sealing structure 2 for a PCBA board. The active speaker includes a speaker housing 1, a PCBA control board 3, a speaker rear plate 4, and the sealing structure 2. The speaker rear plate 4 is fixed to the rear of the speaker housing 1. Specifically, threaded holes 412 and fixing bolts 411 that mate with the threaded holes 412 are provided around the four periphery of the speaker rear plate 4. The speaker rear plate 4 is installed at the rear of the speaker housing by the fixing bolts 411 passing through the threaded holes 412 around the four periphery of the speaker rear plate 4. The PCBA control board 3 is installed inside the speaker housing 1 and inside the speaker rear plate 4. The bottom of the sealing structure 2 is installed at the front end of the PCBA control board 3 so that the sealing structure 2 covers the front end of the PCBA control board 3. The sidewall of the sealing structure 2 abuts against the inner side of the speaker iron back plate 4. The sealing structure 2 includes a sealing cover 21 and a fastener 22. The PCBA control board 3 is provided with a fixing hole 212 that cooperates with the fastener 22. The sealing cover 21 is a semi-enclosed shell. The bottom and sidewall of the sealing cover 21 are respectively formed with a first outer edge 216 and a second outer edge 217. An EVA pad 213 is pasted on the first outer edge 216 and the second outer edge 217 of the sealing cover 21. The sealing cover 21 is placed on the front end of the PCBA control board 3 and the bottom of the sealing cover 21 is fixed to the front end of the PCBA control board 3 by the fastener 22 so that the EVA pad 213 of the first outer edge 216 of the sealing cover 21 fits against the PCBA control board 3. The second outer edge 217 of the sidewall of the sealing cover 21 abuts against the inner side of the speaker iron back plate 4. In this specific implementation, a plurality of connecting posts 211 are provided on the sealing cover 21. The plurality of connecting posts 211 are distributed at intervals along the vertical direction of the sealing cover 21 and form an integral structure with the sealing cover 21. Each connecting post 211 is provided with a fastening hole that cooperates with the fastener 22. The fastener 22 passes through the fixing hole 212 of the PCBA control board 3 and the fastening hole of the connecting post 211 on the sealing cover 21, and then fixes the sealing cover 21 to the front end of the PCBA control board 3. The fastener 22 is preferably a fastening screw, and the fastening hole can be set as a threaded hole 412. In this utility model, an EVA pad 213 is pasted on the outer edge of the sealing cover 21. When the sealing cover 21 is fixed to the front end of the PCBA control board 3 by the fastener 22, the EVA pad 213 on the first outer edge 216 of the sealing cover 21 is deformed by pressure and then completely adheres to the PCBA control board 3, thereby improving the sealing performance of the bottom end of the sealing cover 21 and the PCBA control board 3.Furthermore, this illustrative invention provides a sealing cover 21 at the front end of the PCBA control board 3. The first outer edge 216 of the sealing cover 21 is in contact with the PCBA control board 3. The EVA pads 213 attached to the first outer edge 216 and the second outer edge 217 of the sealing cover 21 can buffer vibration and distribute stress in the sealing cover 21. Assembling the sealing cover 21 and the PCBA control board 3 into an integral structure is beneficial to improving the shock resistance of the PCBA control board 3, increasing the strength and anti-turbulence (shock resistance) capability of the PCBA control board 3, preventing airflow turbulence inside the speaker housing 1, and preventing abnormal noise caused by airflow disturbance causing the PCBA control board 3 to vibrate. It also protects the front end of the PCBA control board and prevents airflow from impacting the electronic components of the PCBA control board 3, thus extending the service life of the speaker. Fasteners 22 are used to assemble the sealing cover 21 and the PCBA control board 3, facilitating disassembly and subsequent maintenance.

[0028] In this embodiment, the EVA pad 213 adhered to the first outer edge 216 and the second outer edge 217 of the sealing cover 21 has a thickness of 1mm. The EVA pad 213 of this invention has self-adhesive backing; during installation, simply peel off the release paper from the adhesive backing of the EVA pad 213 to attach it to the first outer edge 216 and the second outer edge 217 of the sealing cover 21. The operation is simple and the positioning is accurate. The 1mm thickness of the adhered EVA pad 213 provides good compression resilience. If there is slight unevenness in the first outer edge 216 and the second outer edge 217 of the sealing cover 21, the EVA pad 213 can effectively fill the gap and uneven area between the edge of the sealing cover 21 and the surface of the PCBA control board 3, forming a continuous sealing line and ensuring that the first outer edge 216 of the sealing cover 21 is completely adhered to the PCBA control board 3.

[0029] In a specific implementation, the PCBA control board 3 of this utility model includes an RCA connector 31, an earphone connector 32, and a network connector 33. The RCA connector 31, earphone connector 32, and network connector 33 are sequentially and alternately welded to the front end of the PCBA control board 3 from left to right. The first outer edge 216 of the bottom end of the sealing cover 21 is fixed to the front end of the PCBA control board 3 so that the sealing cover 21 covers the outer periphery of the RCA connector 31, earphone connector 32, and network connector 33 at the front end of the PCBA control board 3. The first outer edge 216 of the bottom end of the sealing cover 21 is fixed to the front end of the PCBA control board 3 by fasteners so that the sealing cover 21 covers the outer periphery of the RCA connector 31, earphone connector 32, and network connector 33 at the front end of the PCBA control board 3. The front end of the PCBA control board 3 is installed on the inner side of the speaker iron back plate 4.

[0030] In this specific implementation, the present invention provides a first mounting hole 41, a second mounting hole 42, a first connector 48 cooperating with the first mounting hole 41, and a second connector 49 cooperating with the second mounting hole 42 on the speaker cabinet rear plate 4. The top of the RCA connector 31 is provided with a first connection hole 311 cooperating with the first connector 48, and the top of the network connector 33 is provided with a second connection hole 331 cooperating with the second connector 49. The front end of the PCBA control board 3 passes through the speaker cabinet rear plate sequentially via the first connector 48. The first mounting hole 41 of the PCBA control board 3 and the first connection hole 311 of the RCA connector 31 are used to fix the RCA connector 31 at the front end of the PCBA control board 3 to the speaker iron back plate 4. The PCBA control board 3 passes through the second mounting hole 42 and the second connection hole 331 of the speaker iron back plate 4 in sequence through the second connector 49 to fix the network connector 33 at the front end of the PCBA control board 3 to the inner side of the speaker iron back plate 4, so that the side wall of the sealing cover 21 at the front end of the PCBA control board 3 abuts against the inner side of the speaker iron back plate 4.

[0031] In this embodiment, the speaker iron back plate 4 of this utility model is also provided with a third mounting hole 43 and a third connector 410 that cooperates with the third mounting hole 43. The front end of the PCBA control board 3 is fixed with a fixing seat 34. The fixing seat 34 is located on one side of the sealing cover 21. The middle part of the fixing seat 34 is provided with a third connecting hole 341 that cooperates with the third connector 410. The third mounting hole 43, the first mounting hole 41, and the second mounting hole 42 are distributed sequentially from left to right along the speaker iron back plate 4 and correspond to the positions of the first connecting hole 311 of the RCA seat 31, the second connecting hole 331 of the network connector 33, and the third connecting hole 341 in the middle of the fixing seat 34, respectively. The fixing seat 34 at the front end of the PCBA control board 3 passes through the third mounting hole 43 and the third connecting hole 341 of the fixing seat 34 in sequence through the third connector 410 so that the fixing seat 34 at the front end of the PCBA control board 3 is fixed to the speaker iron back plate 4. In specific implementation, the first connector 48, the second connector 49, and the third connector 410 can be fastening screws, and the first connecting hole 311, the second connecting hole 331, and the third connecting hole 341 can be set as threaded holes 412. An audio signal input connector 312 and an audio signal output connector 313 are provided on the RCA socket 31, arranged in parallel. An earphone jack 321 is provided on the headphone socket 32, and a network connector 332 is provided on the network connector 33. The speaker enclosure rear plate 4 has a first opening 44 that matches the shape of the audio signal input connector 312, a second opening 45 that matches the shape of the audio signal output connector 313, a third opening 46 that matches the shape of the headphone jack 321, and a fourth opening 47 that matches the shape of the network connector 332. The first opening is provided... 44, 45, 46, and 47 are provided as follows: When the EVA pad 213 of the second outer edge 217 of the sealing cover 21 is in contact with the speaker iron back plate 4, the audio signal input connector 312 and audio signal output connector 313 on the RCA connector 31 can pass through the first opening 44 and the second opening 45 on the speaker iron back plate 4, facilitating the connection of audio signal cables. It also facilitates the connection of the headphone connector 321 on the headphone socket 32 ​​through the third opening 46 on the speaker iron back plate 4, and the connection of the network connector 332 on the network connector 33 through the fourth opening 47 on the speaker iron back plate 4, facilitating the connection of network cables. The first opening 44, second opening 45, third opening 46, and fourth opening 47 on the speaker iron back plate 4 ensure that the audio signal input connector 312, audio signal output connector 313, headphone connector 321, and other connectors can be exposed on the speaker housing 1, thus avoiding any impact on the normal use of the speaker.

[0032] The sealing cover 21 of this utility model includes a first plastic mold 214 and a second plastic mold 215. One end of the first plastic mold 214 is fixed to one end of the second plastic mold 215, and the length of the first plastic mold 214 is greater than the length of the second plastic mold 215. In specific implementation, the first plastic mold 214 and the second plastic mold 215 are made of thermoplastic plastic, and one end of the first plastic mold 214 is fixed to one end of the second plastic mold 215 by ultrasonic welding.

[0033] Regarding the entire manufacturing process of the active speaker of this utility model:

[0034] Step 1) Based on the dimensions of the electronic components at the front end of the PCBA control board 3 that need to be sealed, the sealing cover 21 is made, and the plastic mold is cut into the first plastic mold 214 and the second plastic mold 215, wherein the length of the first plastic mold 214 is greater than the length of the second plastic mold 215.

[0035] Step 2) One end of the first plastic mold 214 and one end of the second plastic mold 215 are ultrasonically bonded to form an integral sealing cover 21.

[0036] Step 3) Cut the EVA pad 213 according to the first outer edge 216 and the second outer edge 217 of the sealing cover 21, and attach a 1mm thick layer of EVA pad 213 along the first outer edge 216 and the second outer edge 217 of the sealing cover 21.

[0037] Step 4) After the fastener 22 passes through the fixing hole 212 of the PCBA control board 3 and the fastening hole of the connecting post 211 on the sealing cover 21, the sealing cover 21 is locked and fixed to the front end of the PCBA control board 3, so that the first outer edge 216 of the sealing cover 216 EVA pad 213 is in contact with the PCBA control board 3, ensuring that the sealing cover 21 is in close contact with the front end of the PCBA control board 3.

[0038] Step 5) Pass the first connector 48 through the first mounting hole 41 and the first connection hole 311 of the RCA connector 31 in sequence to fix the RCA connector 31 at the front end of the PCBA control board 3 onto the speaker back plate 4. Then, pass the second connector 49 through the second mounting hole 42 and the second connection hole 331 of the network connector 33 in sequence to fix the network connector 33 at the front end of the PCBA control board 3 onto the speaker back plate 4. This makes the EVA pad 213 of the second outer edge 217 of the sealing cover 21 fit with the speaker back plate 4. The first connector 48 and the second connector 49 are used to combine the sealing cover 21 at the front end of the PCBA control board 3 with the speaker back plate 4. Then, pass the third connector 410 through the third mounting hole 43 and the third connection hole 341 of the fixing seat 34 in sequence to fix the fixing seat 34 at the front end of the PCBA control board 3 onto the speaker back plate 4.

[0039] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. An active speaker with a front-end sealing structure of a PCBA board, characterized in that: The active speaker includes a speaker housing, a PCBA control board, a speaker rear plate, and a sealing structure. The speaker rear plate is fixed to the rear of the speaker housing. The PCBA control board is installed inside the speaker housing and on the inner side of the speaker rear plate. The bottom of the sealing structure is installed at the front end of the PCBA control board so that the sealing structure covers the front end of the PCBA control board. The side wall of the sealing structure abuts against the inner side of the speaker rear plate. The sealing structure includes a sealing cover and fasteners. The PCBA control board has fixing holes that mate with the fasteners. The bottom and side wall of the sealing cover respectively form a first outer edge and a second outer edge. A layer of EVA rubber gasket is pasted on both the first and second outer edges of the sealing cover. The sealing cover is placed on the front end of the PCBA control board, and the bottom of the sealing cover is fixed to the front end of the PCBA control board by the fasteners so that the EVA rubber gasket on the first outer edge of the sealing cover is in contact with the PCBA control board. The second outer edge of the side wall of the sealing cover abuts against the inner side of the speaker rear plate.

2. The active speaker with a front-end sealing structure of the PCBA board according to claim 1, characterized in that: The sealing cover is provided with several connecting posts, which are spaced apart from each other along the vertical direction of the sealing cover. Each connecting post is provided with a fastening hole that mates with a fastener. The fastener passes through the fixing hole of the PCBA control board and the fastening hole of the connecting post on the sealing cover to fix the sealing cover to the front end of the PCBA control board.

3. The active speaker with a front-end sealing structure of the PCBA board according to claim 1, characterized in that: The EVA pads adhered to the first and second outer edges of the sealing cover are 1 mm thick.

4. The active speaker with a front-end sealing structure of the PCBA board according to claim 1, characterized in that: The PCBA control board includes an RCA connector, an earphone connector, and a network connector. The RCA connector, earphone connector, and network connector are sequentially and alternately soldered to the front end of the PCBA control board from left to right. The first outer edge of the bottom end of the sealing cover is fixed to the front end of the PCBA control board so that the sealing cover covers the outer periphery of the RCA connector, earphone connector, and network connector at the front end of the PCBA control board. The first outer edge of the bottom end of the sealing cover is fixed to the front end of the PCBA control board by fasteners so that the sealing cover covers the outer periphery of the RCA connector, earphone connector, and network connector at the front end of the PCBA control board. The front end of the PCBA control board is installed on the inner side of the speaker's rear metal plate.

5. The active speaker with a front-end sealing structure of the PCBA board according to claim 4, characterized in that: The speaker enclosure's rear plate has a first mounting hole, a second mounting hole, a first connector that mates with the first mounting hole, and a second connector that mates with the second mounting hole. The top of the RCA connector has a first connecting hole that mates with the first connector, and the top of the network connector has a second connecting hole that mates with the second connector. The front end of the PCBA control board passes through the first mounting hole and the first connecting hole of the RCA connector in sequence through the first connector to fix the RCA connector at the front end of the PCBA control board to the speaker enclosure's rear plate. The PCBA control board passes through the second mounting hole and the second connecting hole of the network connector in sequence through the second connector to fix the network connector at the front end of the PCBA control board to the inner side of the speaker enclosure's rear plate. The front end of the PCBA control board is mounted on the inner side of the speaker enclosure's rear plate via the RCA connector, headphone jack, and network connector.

6. The active speaker with a front-end sealing structure of the PCBA board according to claim 5, characterized in that: The speaker enclosure rear plate is also provided with a third mounting hole and a third connector that mates with the third mounting hole. The front end of the PCBA control board is fixed with a mounting base. The mounting base is located on one side of the sealing cover. The middle part of the mounting base is provided with a third connecting hole that mates with the third connector. The third mounting hole, the first mounting hole, and the second mounting hole are distributed sequentially from left to right along the speaker enclosure rear plate and correspond to the positions of the first connecting hole of the RCA connector, the second connecting hole of the network connector, and the third connecting hole in the middle of the mounting base, respectively. The mounting base at the front end of the PCBA control board passes through the third mounting hole of the speaker enclosure rear plate and the third connecting hole of the mounting base in sequence through the third connector so that the mounting base at the front end of the PCBA control board is fixed to the speaker enclosure rear plate.

7. The active speaker with a front-end sealing structure of the PCBA board according to claim 1, characterized in that: The sealing cover includes a first plastic mold and a second plastic mold, with one end of the first plastic mold fixed to one end of the second plastic mold.

8. The active speaker with a front-end sealing structure of the PCBA board according to claim 7, characterized in that: The length of the first plastic mold is greater than the length of the second plastic mold.

9. The active speaker with a front-end sealing structure of the PCBA board according to claim 1, characterized in that: The speaker cabinet's rear iron plate has threaded holes and fixing bolts that mate with the threaded holes around its four perimeter. The speaker cabinet's rear iron plate is installed at the rear of the speaker cabinet by passing the fixing bolts through the threaded holes around its four perimeter.

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