A multifunctional combined speaker

Abstract

The present invention discloses a multifunctional speaker combination, comprising a foldback speaker, an ultra-low frequency speaker and a power amplifier, wherein the foldback speaker comprises a low frequency speaker and a full-frequency speaker, a frequency divider is arranged in the power amplifier, the frequency divider is connected with an external audio output device and is suitable for being connected with the low frequency speaker and the full-frequency speaker or with the ultra-low frequency speaker and the full-frequency speaker, a containing cavity is arranged on the low frequency speaker, a fixing device is arranged on the ultra-low frequency speaker, the full-frequency speaker can be installed in the containing cavity or on the top of the fixing device, and the multifunctional speaker combination can be split and combined according to the use requirements, and is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of sound boxes, and in particular to a multifunctional combined sound box. Background Art

[0002] A speaker is a device that converts audio signals into sound.

[0003] However, the existing speakers have single functions and cannot be split or combined according to usage needs, which is inconvenient to use. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a multifunctional combined speaker that can be split and combined according to usage needs and is easy to use.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A multifunctional combined speaker comprises a foldback speaker, an ultra-low frequency speaker and a power amplifier, wherein the foldback speaker comprises a low frequency speaker and a full frequency speaker, the power amplifier is suitable for being connected to the low frequency speaker and the full frequency speaker or to the ultra-low frequency speaker and the full frequency speaker, the low frequency speaker is provided with a containing cavity, the ultra-low frequency speaker is provided with a fixing device, and the low frequency speaker can be installed in the containing cavity or installed on the top of the fixing device.

[0007] Furthermore, the low-frequency speaker includes a low-frequency speaker box body and an iron mesh installed on the surface of the low-frequency speaker box body, the low-frequency speaker box body is provided with a mounting groove, and the iron mesh and the mounting groove surround the accommodating cavity.

[0008] Furthermore, the low-frequency speaker also includes a positioning component arranged on the side of the low-frequency speaker box body, and the positioning component includes a locking pin, a first end of which is formed with a handle, and a second end of which passes through the wall of the accommodating cavity and is threadedly connected to the wall of the accommodating cavity.

[0009] Furthermore, a placement hole connected to the accommodating cavity is opened on the side of the low-frequency speaker, a fixing plate is arranged in the placement hole, the first end of the locking pin is placed in the placement hole, the second end passes through the fixing plate and is placed in the accommodating cavity, and the locking pin is threadedly connected to the fixing plate.

[0010] Furthermore, a support assembly is also provided on the side of the low-frequency speaker, and the support assembly includes a fixing sleeve, a supporting plate and a latch, the first end of the supporting plate is sleeved in the fixing sleeve, and the other end is placed outside the fixing sleeve and is suitable for abutting against the ground, a plurality of first clamping holes are provided on the surface of the supporting plate, and the plurality of clamping holes are equidistantly distributed along the length direction of the supporting plate, a second clamping hole is provided on the surface of the fixing sleeve, and the latch is suitable for passing through the second clamping hole and the first clamping hole to lock the supporting plate.

[0011] Furthermore, the subwoofer includes a subwoofer cabinet, a first baffle and a second baffle are symmetrically arranged in the subwoofer cabinet, a sound unit is installed on the first baffle and the second baffle, a playback port is arranged on one side of the subwoofer cabinet, a sound emitting end of the sound unit is inclined toward the playback port, the sound unit includes an upper basin frame, a voice coil, a magnetic circuit, a paper cone and a lower basin frame, the paper cone is arranged in the lower basin frame, the voice coil is installed at the center of the upper end surface of the paper cone, the upper basin frame is installed at the upper end of the lower basin frame, and the magnetic circuit is installed at the lower end of the upper basin frame and placed directly above the voice coil.

[0012] Furthermore, the subwoofer box includes a first side, a second side opposite to the first side, a third side and a fourth side opposite to the third side, the first side is provided with the playback port, the first partition plate and the second side and the third side form a first cavity, the second partition plate and the second side and the fourth side form a second cavity, and a first guide tube connecting the first cavity and the second cavity is formed between the first partition plate and the second partition plate.

[0013] Furthermore, a first extension plate is extended from the end of the first partition toward the third side, and a second extension plate is extended from the end of the second partition toward the fourth side. The first extension plate divides the first cavity into a first inner cavity and a second guide tube, and the first extension plate and the second side form the second guide tube. The second extension plate divides the second cavity into a second inner cavity and a third guide tube, and the second extension plate and the second side form the third guide tube.

[0014] Furthermore, a first baffle is extended from the end of the first extension plate toward the first side edge, and a second baffle is extended from the end of the second extension plate toward the first side edge. The first baffle and the first side edge form a fourth guide tube connected to the second guide tube, and the second baffle and the third side edge form a fifth guide tube connected to the third guide tube.

[0015] Furthermore, the low-frequency speaker also includes a sound-emitting unit, which includes an upper basin frame, a voice coil, a magnetic circuit, a paper cone and a lower basin frame, the paper cone is arranged in the lower basin frame, the voice coil is installed at the center of the upper end surface of the paper cone, the upper basin frame is installed at the upper end of the lower basin frame, and the magnetic circuit is installed at the lower end of the upper basin frame and placed directly above the voice coil.

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

[0017] By providing a accommodating cavity on the low-frequency speaker and installing a fixing device on the sub-low-frequency speaker, the full-range speaker can be installed on the low-frequency speaker or the sub-low-frequency speaker according to the needs of use, and in conjunction with the provided crossover, the electrical signal can be input into the full-range speaker and the low-frequency speaker or transmitted to the full-range speaker and the sub-low-frequency speaker according to different needs of use, so as to adapt to different needs, with diverse functions, and only one crossover is needed to transmit electrical signals to the full-range speaker and the low-frequency speaker or the full-range speaker and the sub-low-frequency speaker. There is no need to add a crossover separately, and the equipment cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a multifunctional combined sound box of the present invention;

[0019] Figure 2 A schematic diagram of a multifunctional combined speaker in use state 1 of the present invention;

[0020] Figure 3 A schematic diagram of a multifunctional combined speaker in use state 2 of the present invention;

[0021] Figure 4 This is a schematic structural diagram of a multifunctional combined speaker low-frequency speaker of the present invention without the iron mesh;

[0022] Figure 5 It is a structural schematic diagram of a low-frequency speaker box of a multifunctional combined speaker of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a low-frequency speaker support assembly of a multifunctional combined speaker of the present invention;

[0024] Figure 7 It is a structural schematic diagram of a locking pin of a multifunctional combined sound box of the present invention;

[0025] Figure 8 It is a structural schematic diagram of a multifunctional combined speaker and ultra-low frequency speaker of the present invention;

[0026] Fig. 9 A cross-sectional view of a multifunctional combined speaker and a sub-low frequency speaker of the present invention;

[0027] Fig.10 It is a structural schematic diagram of a multifunctional combined sound box sound unit of the present invention;

[0028] Fig.11 A cross-sectional view of a multifunctional combined sound box sound unit of the present invention;

[0029] Fig.12 It is a structural schematic diagram of a multifunctional combined speaker and full-range speaker of the present invention;

[0030] Fig.13 The present invention is a schematic structural diagram of a multifunctional combined sound box power amplifier.

[0031] Illustration: 10, low-frequency speaker; 11, low-frequency speaker box; 111, installation slot; 112, placement hole; 113, handle slot; 114, installation hole; 12, iron net; 13, locking pin; 131, handle; 14, sound unit; 141, upper basin frame; 142, voice coil; 143, magnetic circuit; 144, paper cone; 145, lower basin frame; 15, support assembly; 151, fixing sleeve; 1511, second clamping hole; 152, support plate; 1521, first clamping hole; 153, latch; 16, fixing plate; 20, full-range speaker; 21, handle; 30, subwoofer; 31, subwoofer box; 31, first side; 312, second side; 313, third side; 314, fourth side; 315, playback port; 316, first inner cavity; 317, second inner cavity; 32, first partition; 321, mounting portion; 322, step portion; 323, guide portion; 324, first guide plate; 33, second partition; 331, second guide plate; 34, first guide tube; 35, first extension plate; 36, second extension plate; 37, first baffle; 38, second baffle; 40, fixing device; 50, power amplifier. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] like Figure 1-12 A multifunctional combination speaker is shown, comprising a foldback speaker, a subwoofer 30 and an amplifier 50. The foldback speaker comprises a low-frequency speaker 10 and a full-frequency speaker. The amplifier is suitable for being connected to the low-frequency speaker 10 and the full-frequency speaker or to the subwoofer 30 and the full-frequency speaker. A containing cavity is provided on the low-frequency speaker 10, and a fixing device 40 is provided on the subwoofer 30. The full-frequency speaker 10 can be installed in the containing cavity or on the top of the fixing device 40.

[0034] In the present application, the fixing device 40 is a fixing rod installed on the subwoofer 30. To facilitate the installation of the full-range speaker 20, a mounting seat adapted to the top of the fixing rod is also provided on the full-range speaker 20, and the mounting seat is fixed to the fixing rod by bolts.

[0035] Use state 1, such as Figure 3 As shown, if the low-frequency speaker 10 and the full-frequency speaker 20 need to be used at the same time, the full-frequency speaker 20 is installed in the receiving groove of the low-frequency speaker 10 to form a return speaker, and the frequency divider in the power amplifier is connected to the low-frequency speaker 10 and the full-frequency speaker 20 respectively, so that the audio signal input from the external audio output device is converted into a high-frequency electrical signal and an intermediate-frequency electrical signal through the frequency divider, and the high-frequency electrical signal is transmitted to the full-frequency speaker 20, and the intermediate-frequency signal is transmitted to the low-frequency speaker 10. If the power amplifier 50 is provided with a frequency divider, the external audio output device needs to be transmitted through the external frequency divider. The input audio signal is converted into a high-frequency electrical signal and an intermediate-frequency electrical signal and transmitted to the power amplifier 50, which is respectively transmitted to the low-frequency speaker 10 and the full-range speaker 20. After the full-range speaker 20 receives the high-frequency electrical signal transmitted by the crossover, the high-frequency electrical signal is converted into high-frequency music through the sound-emitting unit 14 (i.e., the speaker) of the full-range speaker 20. After the low-frequency speaker 10 receives the intermediate-frequency electrical signal transmitted by the crossover, the intermediate-frequency signal is converted into intermediate-frequency music through the sound-emitting unit 14 of the low-frequency speaker 10. At this time, the multifunctional speaker of the present application will emit music in the intermediate and high frequency bands.

[0036] Use state 2, such as Figure 2 As shown, the full-range speaker 20 can be taken out according to the needs of use, and then the full-range speaker 20 is installed on the top of the fixing device, and the crossover is connected to the full-range speaker 20 and the subwoofer 30 to meet the needs of the scene. There is no need to add a crossover separately, the equipment cost is low, and the low-frequency speaker 10 and the subwoofer 30 can be combined with the full-range speaker 20 at will to meet various usage needs, which is easy to use.

[0037] like Figure 3-7 As shown, the low-frequency speaker 10 includes a low-frequency speaker box 11 and an iron mesh 12 installed on the surface of the low-frequency speaker box 11. The low-frequency speaker box 11 is provided with an installation groove 111, and the iron mesh 12 and the installation groove 111 form a receiving cavity. By using the iron mesh 12 and the installation groove 111 to form a receiving cavity, it is possible to ensure that the sound unit 14 of the full-frequency speaker 20 transmits music, while preventing foreign objects from contacting the sound unit 14 of the full-frequency speaker 20 and causing damage to it. When installing the full-frequency speaker 20 into the receiving cavity of the low-frequency speaker 10, the sound unit 14 of the full-frequency speaker 20 needs to be installed toward the iron mesh 12 so that the sound unit 14 of the full-frequency speaker 20 transmits sound.

[0038] The low-frequency speaker 10 also includes a positioning assembly arranged on the side of the low-frequency speaker box 11, and the positioning assembly includes a locking pin 13, a first end of the locking pin 13 is formed with a handle 131, and a second end penetrates through the wall of the accommodating cavity and is threadedly connected with the wall of the accommodating cavity. When in use, the user rotates the handle 131 to move the second end of the locking pin 13 toward the accommodating cavity, thereby contacting the full-frequency speaker 20 installed in the accommodating cavity, and as the locking pin 13 continues to extend, the locking pin 13 will be pressed against the full-frequency speaker 20 to limit the displacement of the full-frequency speaker 20 in the accommodating cavity, thereby preventing the full-frequency speaker 20 from leaving the accommodating cavity during use.

[0039] More specifically, a placement hole 112 connected to the accommodating cavity is provided on the side of the low-frequency speaker 10, a fixing plate is provided in the placement hole 112, a first end of the locking pin 13 is placed in the placement hole 112, and a second end passes through the fixing plate and is placed in the accommodating cavity, and the locking pin 13 is threadedly connected with the fixing plate. By providing the placement hole 112 on the side of the low-frequency speaker body 11 to accommodate the first end of the locking pin 13, it is prevented that the handle 131 installed on the first end of the locking pin 13 protrudes from the side of the low-frequency speaker body 11, which is easily deformed by impact, and is easy to cause misoperation, causing the locking pin 13 to continue to move into the accommodating cavity and squeeze the tweeter in the accommodating cavity.

[0040] like Figure 6 As shown, a support assembly 15 is also provided on the side of the low-frequency speaker 10, and the support assembly 15 includes a fixing sleeve 151, a supporting plate 152 and a latch 153. The first end of the supporting plate 152 is sleeved in the fixing sleeve 151, and the other end is placed outside the fixing sleeve 151 and is suitable for abutting against the ground. A plurality of first clamping holes 1521 are provided on the surface of the supporting plate 152, and the plurality of clamping holes are equidistantly distributed along the length direction of the supporting plate 152. A second clamping hole 1511 is provided on the surface of the fixing sleeve 151, and the latch 153 is suitable for passing through the second clamping hole 1511 and the first clamping hole 1521 to lock the supporting plate 152.

[0041] When in use, the pin 153 is pulled out and the support plate 152 can slide in the fixing sleeve 151. At this time, the length of the support plate 152 extended or retracted into the fixing sleeve 151 can be adjusted according to the needs of use, thereby adjusting the distance between the fixing sleeve 151 and the ground when the support plate 152 abuts against the ground, adjusting the inclination angle of the low-frequency speaker 10, and then aligning the first clamping hole 1521 with the second clamping hole 1511, and inserting the pin 153 to lock the support plate 152.

[0042] Specifically, a handle groove 113 for a user to grasp is provided on the side of the low frequency speaker 10 .

[0043] In addition, the low-frequency speaker 10 also includes a fixing plate 16. When the low-frequency speaker 10 needs to be fixed to a fixed surface such as a wall, the fixing plate 16 can be locked on the wall, and the low-frequency speaker 10 is suitable for connecting to a fixed surface such as a wall.

[0044] Specifically, in order to facilitate the user to take the full-range speaker 20 out of the accommodating cavity, a handle 21 is provided on the surface of the full-range speaker 20 .

[0045] In addition, the low frequency speaker 10 and the sub-low frequency speaker 30 further include a sound generating unit 14, such as Fig.10 and 11 As shown, the sound unit 14 includes an upper basin frame 141, a voice coil 142, a magnetic circuit 143, a paper cone 144 and a lower basin frame 145. The paper cone 144 is arranged in the lower basin frame 145, the voice coil 142 is installed at the center of the upper end surface of the paper cone 144, the upper basin frame 141 is installed at the upper end of the lower basin frame 145, and the magnetic circuit 143 is installed at the lower end of the upper basin frame 141 and is placed directly above the voice coil 142. The low-frequency speaker 10 is provided with a mounting hole 114 for mounting the sound unit 14.

[0046] By installing the voice coil 142 at the center of the upper end surface and correspondingly installing the magnetic circuit 143 above the voice coil 142, the space in the recessed portion of the upper end of the paper cone 144 can be fully utilized to reduce the overall thickness of the sound unit 14, thereby reducing the volume of the low-frequency speaker 10 and the sub-low-frequency speaker 30.

[0047] like Figure 8 and 9 As shown, the subwoofer 30 includes a subwoofer box 31, in which a first baffle 32 and a second baffle 33 are symmetrically arranged, and a sound unit is installed on the first baffle 32 and the second baffle 33. A playback port 315 is arranged on one side of the subwoofer box 31, and the sound emitting end of the sound unit is inclined toward the playback port 315. The sound unit includes an upper basin frame 141, a voice coil 142, a magnetic circuit 143, a paper cone 144 and a lower basin frame 145. The paper cone 144 is arranged in the lower basin frame 145, the voice coil 142 is installed at the center of the upper end surface of the paper cone 144, the upper basin frame 141 is installed at the upper end of the lower basin frame 145, and the magnetic circuit 143 is installed at the lower end of the upper basin frame 141 and is placed directly above the voice coil 142.

[0048] The subwoofer box 31 includes a first side 311, a second side 312 opposite to the first side 311, a third side 313 and a fourth side 314 opposite to the third side 313. The first side 311 is provided with a playback port 315. The first partition 32 and the second side 312 and the third side 313 form a first cavity. The second partition 33 and the second side 312 and the fourth side 314 form a second cavity. A first guide tube 34 connecting the first cavity and the second cavity is formed between the first partition 32 and the second partition 33.

[0049] During operation, the paper cone 144 of the pronunciation unit will vibrate to produce sound, and the paper cone 144 will generate airflow during the high-speed vibration process. If the generated airflow is not guided, the airflow will affect the vibration of the paper cone 144 and affect the sound quality. Therefore, in the present application, the first partition 32 and the second side 312 and the third side 313 are used to form a first cavity, and the second partition 33 and the second side 312 and the fourth side 314 are used to form a second cavity. A first guide tube 34 connecting the first cavity and the second cavity is formed between the first partition 32 and the second partition 33, so that during operation, the generated airflow passes through the first guide tube 34 into the first cavity and the second cavity or enters the first guide tube 34 from the first cavity and the second cavity, and is discharged from the playback port 315 along the first guide tube 34, so as to avoid disordered movement of the airflow and affect the sound quality.

[0050] More specifically, a first extension plate 35 is extended from the end of the first partition 32 toward the third side 313, and a second extension plate 36 is extended from the end of the second partition 33 toward the fourth side 314. The first extension plate 35 divides the first cavity into a first inner cavity 316 and a second guide tube. The first extension plate 35 and the second side 312 form a second guide tube. The second extension plate 36 divides the second cavity into a second inner cavity 317 and a third guide tube. The second extension plate 36 and the second side 312 form a third guide tube.

[0051] By extending the first extension plate 35 from the end of the first partition 32 toward the third side 313 to form a second guide tube with the second side 312, and extending the second extension plate 36 from the end of the second partition 33 toward the fourth side 314 to form a third guide tube with the second side 312, it is further convenient to guide the generated airflow into the first cavity and the second inner cavity 317 in an orderly manner, or to discharge the airflow in the first inner cavity 316 and the second inner cavity 317 in an orderly manner along the second guide tube and the third guide tube to the first guide tube 34 and discharge it from the ultra-low frequency speaker cabinet 31 through the playback port 315, which is beneficial for the pronunciation unit to emit low-frequency music.

[0052] More specifically, a first baffle plate 37 is extended from the end of the first extension plate 35 toward the first side edge 311, and a second baffle plate 38 is extended from the end of the second extension plate 36 toward the first side edge 311. The first baffle plate 37 and the first side edge 311 form a fourth guide tube connected to the second guide tube, and the second baffle plate 38 and the third side edge 313 form a fifth guide tube connected to the third guide tube. By providing the fourth guide tube and the fifth guide tube, it is further convenient to introduce the generated airflow into the first cavity and the second inner cavity 317 in an orderly manner, or to discharge the airflow in the first inner cavity 316 and the second inner cavity 317 in an orderly manner to the first guide tube 34 and discharge it out of the ultra-low frequency speaker cabinet 31 through the playback port 315, which is beneficial for the pronunciation unit to emit low-frequency music.

[0053] More specifically, in order to prevent the airflow from contacting the corners of the first partition 32 and the first extension plate 35 and the corners of the second partition 33 and the second extension plate 36 to generate noise, a first guide plate 324 is formed at the end of the first partition 32, and a second guide plate 331 is formed at the end of the second partition 33, so that the first partition 32 and the first extension plate 35 can transition smoothly, and the second partition 33 and the second extension plate 36 can transition smoothly to avoid generating noise, and the first guide plate 324 and the second guide plate 331 are surrounded by a trumpet shape with an opening toward the second side edge 312 to facilitate the airflow to enter the first guide tube 34.

[0054] The first partition 32 and the second partition 33 also include a mounting portion 321 for mounting a sounding unit, a guide portion 323 for enclosing a first guide tube 34, and a step portion 322 connecting the mounting portion 321 and the guide portion 323. The mounting portion 321 and the guide portion 323 are connected by utilizing the step portion 322 so that the sounding unit 14 is mounted on the mounting portion 321, and the sound emitting end surface of the sounding unit 14 is on the same horizontal plane as the guide portion 323, so as to avoid the airflow from contacting the sound emitting end portion of the sounding unit 14 protruding from the guide portion 323 to generate noise.

[0055] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A multifunctional combined sound box, characterized in that: It includes a foldback speaker, a subwoofer and a power amplifier. The foldback speaker includes a subwoofer and a full-range speaker. The power amplifier is suitable for connecting with the subwoofer and the full-range speaker or with the subwoofer and the full-range speaker. The subwoofer is provided with a receiving cavity. The subwoofer is provided with a fixing device. The subwoofer can be installed in the receiving cavity or on the top of the fixing device. The low-frequency speaker box includes a low-frequency speaker box body and an iron mesh installed on the surface of the low-frequency speaker box body, the low-frequency speaker box body is provided with an installation groove, and the iron mesh and the installation groove surround the accommodating cavity; the low-frequency speaker box also includes a positioning component arranged on the side of the low-frequency speaker box body, the positioning component includes a locking pin, the first end of the locking pin is formed with a handle, the second end passes through the cavity wall of the accommodating cavity and is threadedly connected with the cavity wall of the accommodating cavity, the side of the low-frequency speaker box is provided with a placement hole connected to the accommodating cavity, a fixing plate is arranged in the placement hole, the first end of the locking pin is placed in the placement hole, the second end passes through the fixing plate and is placed in the accommodating cavity, and the locking pin is threadedly connected with the fixing plate; A support assembly is also provided on the side of the low-frequency speaker, and the support assembly includes a fixing sleeve, a supporting plate and a latch, wherein a first end of the supporting plate is sleeved in the fixing sleeve, and the other end is placed outside the fixing sleeve and is suitable for contacting with the ground, a plurality of first clamping holes are provided on the surface of the supporting plate, and the plurality of clamping holes are equidistantly distributed along the length direction of the supporting plate, a second clamping hole is provided on the surface of the fixing sleeve, and the latch is suitable for passing through the second clamping hole and the first clamping hole to lock the supporting plate; The subwoofer includes a subwoofer box body, a first baffle and a second baffle are symmetrically arranged in the subwoofer box body, a sound unit is installed on the first baffle and the second baffle, a playback port is arranged on one side of the subwoofer box body, and a sound release end of the sound unit is inclined toward the playback port; The subwoofer box body includes a first side, a second side opposite to the first side, a third side and a fourth side opposite to the third side, the first side is provided with the playback port, the first partition plate and the second side and the third side form a first cavity, the second partition plate and the second side and the fourth side form a second cavity, a first guide tube connecting the first cavity and the second cavity is formed between the first partition plate and the second partition plate, a first extension plate is extended from the end of the first partition plate toward the third side, a second extension plate is extended from the end of the second partition plate toward the fourth side, and the first An extension plate divides the first cavity into a first inner cavity and a second guide tube, the first extension plate and the second side edge form the second guide tube, the second extension plate divides the second cavity into a second inner cavity and a third guide tube, the second extension plate and the second side edge form the third guide tube, a first baffle plate extends from the end of the first extension plate toward the first side edge, a second baffle plate extends from the end of the second extension plate toward the first side edge, the first baffle plate and the first side edge form a fourth guide tube connected to the second guide tube, and the second baffle plate and the third side edge form a fifth guide tube connected to the third guide tube.

2. A multifunctional combination speaker as claimed in claim 1, characterized in that: The sound producing unit comprises an upper basin frame, a voice coil, a magnetic circuit, a paper cone and a lower basin frame. The paper cone is arranged in the lower basin frame, the voice coil is installed at the center of the upper end surface of the paper cone, the upper basin frame is installed at the upper end of the lower basin frame, and the magnetic circuit is installed at the lower end of the upper basin frame and placed directly above the voice coil.

3. A multifunctional combined sound box as claimed in claim 1, characterized in that: The low-frequency speaker also includes a sound-emitting unit, which includes an upper basin frame, a voice coil, a magnetic circuit, a paper cone and a lower basin frame. The paper cone is arranged in the lower basin frame, the voice coil is installed at the center of the upper end surface of the paper cone, the upper basin frame is installed at the upper end of the lower basin frame, and the magnetic circuit is installed at the lower end of the upper basin frame and placed directly above the voice coil.

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