CN212936103U - Intelligent control public address set - Google Patents

Abstract

The utility model discloses an intelligent control public address set, which relates to the public address equipment field, comprising a public address set, a sliding cover A and a rubber tube, wherein one side of the sliding cover A is provided with a clamping groove, the clamping plate is sleeved inside the clamping groove, one side of the clamping plate is fixedly connected with the sliding cover B, the bottom surface of the sliding cover A is provided with a sliding groove, the bottom surface of the sliding cover B is provided with a sliding groove, and a protective net is fixedly connected with the bottom surface of the public address set, the utility model can compress the rubber tube at one side downwards by applying vertical external force to one side of the rubber tube, and the side opposite to the one side can extend upwards at the same time, so that the public address set forms a certain inclination angle, and further people can adjust the proper position, and through a standby battery placed in the standby groove, thereby facilitating people to replace the battery at any time when the equipment is without electricity, therefore, the problem that the device cannot be used when people go out for amplifying the sound is solved.

Description

Intelligent control public address set

Technical Field

The utility model relates to a public address equipment technical field specifically is an intelligent control public address set.

Background

The power amplifier is called power amplifier for short, and is one of the most basic devices in sound system, commonly called loudspeaker, and its task is to amplify weak electric signal from signal source to drive loudspeaker to make sound. But may also refer to other devices that perform power amplification. The power amplifier is used for amplifying weak signals from the sound source or the pre-amplifier and pushing the sound box to play sound. The power of a set of good sound system power amplifier is not available. The power amplifier is the largest family of various sound equipment and mainly has the function of amplifying a weak signal input by a sound source equipment and then generating enough current to push a loudspeaker to replay sound. Different power amplifiers are also different in internal signal processing, circuit design and production process due to the consideration of power, impedance, distortion, dynamics and different application ranges and control and regulation functions. The frequency shift power amplifier can effectively inhibit on-site whistling except the function of amplifying the amplified signal of the common power amplifier to drive the loudspeaker to amplify sound, ensures the transmission quality of voice, can also greatly inhibit whistling even in the occasion with poor environment, and protects the sound equipment from being burnt out due to whistling. The frequency shift power amplifier is widely applied to high-grade multimedia electric classrooms, training rooms, small meeting rooms or other simple sound amplification occasions, the microphone can be directly connected with the frequency shift power amplifier, the howling of the microphone to the sound box can be effectively inhibited, and background music is connected for sound amplification.

However, the existing smart phone has limited sound effect, if the existing smart phone has no effect in a noisy environment, an external sound amplifying device is needed to enhance the sound amplifying effect, but most of the existing smart phone sound amplifying devices are fixed in direction and angle, so that people are inconvenient to adjust the angle freely according to their own purposes, the existing smart phone sound amplifying devices are heavy, dust is easily attached to the existing smart phone sound amplifying devices after the existing smart phone sound amplifying devices are used at the time, especially under the action of no place, unnecessary invasion tasks are added to people, the existing smart phone sound amplifying devices are easily blocked at fine seams, and the existing smart phone sound amplifying devices are not easy to clean, so that the cleaning difficulty of people is increased, and the service life of the existing smart phone sound amplifying devices is further shortened.

Accordingly, one skilled in the art provides an intelligent control loudspeaker device to solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an intelligent control sound amplification device to solve the problems that the prior smart phone proposed in the background art has limited sound effect, and basically has no effect in a more noisy environment, so that an external sound amplification device is needed to enhance the sound amplification effect, however, most of the existing public address devices of smart phones are public address devices with fixed directions and angles, which is inconvenient for people to adjust the angles arbitrarily according to their own needs, and is heavy, moreover, the existing microphone device of the smart phone is easily contaminated by dust after being used at the time, especially under the action of no place, unnecessary invasion tasks are added to people, moreover, the existing smart phone public address device is easy to clamp dust at the slit position and is not easy to clean, this has just increaseed people's the washing degree of difficulty, and then has also reduced current smart mobile phone public address device's life problem.

In order to achieve the above object, the utility model provides a following technical scheme:

an intelligent control public address device comprises a loudspeaker, a sliding cover A and a rubber tube, wherein one side of the sliding cover A is provided with a clamping groove, a clamping plate is sleeved in the clamping groove, one side surface of the clamping plate is fixedly connected with a sliding cover B, the bottom surface of the sliding cover A is provided with a sliding groove, the bottom surface of the sliding cover B is provided with a sliding groove, the bottom surface of the loudspeaker is fixedly connected with a protection net, the inside of the loudspeaker is fixedly connected with a sound generating device, the bottom of the sound generating device is provided with a central processing unit, one side of the central processing unit is provided with a wireless signal receiver, the outer surface of the loudspeaker is fixedly connected with a control button, the bottom surface of the loudspeaker is fixedly connected with a power supply layer, the inside of the power supply layer is provided with a battery, the bottom surface of the power supply layer is provided with a fixed connection, the outer wall swing joint of ball has the swivelling chute, the surface and the power supply layer fixed connection of swivelling chute, the rubber tube is at the one end fixedly connected with base of keeping away from fixed connection board, the inside of base is provided with the reserve tank, one side of reserve tank is provided with the pneumatic pump, the pneumatic pump is at the one side fixedly connected with drawer of keeping away from the reserve tank, the leading flank swing joint of drawer has the hand (hold), the inside of drawer is provided with the hose groove, the back fixedly connected with ash storage groove in hose groove, the inside leading flank fixedly connected with mount in hose groove, the suction head has been cup jointed to the inside of mount, the one end and the hose fixed connection of suction head, the output and the ash storage groove swing joint of hose.

As a preferred embodiment of the present invention: the dust collection button is fixedly connected to the front side face of the base, the outer surface of the base is fixedly connected with the protection plate bottom plate, the expansion plate is movably connected to the inner portion of the protection plate bottom plate, and the top face of the expansion plate is connected with a rotating shaft in a clamped mode.

As a preferred embodiment of the present invention: the surface setting of axis of rotation is in the inside of spout, and the swivelling chute joint is in fixed connection board's inside, and the bottom surface of flexible post and the top surface center fixed connection of base, the shape of protection net are arc, the top and the fixed connection board fixed connection of rubber tube.

As a preferred embodiment of the present invention: the number of axis of rotation has two, the top joint of two axis of rotation and two expansion plates, and the number of expansion plate has eight, and the number of protection shield bottom plate has four, and four protection shield bottom plate fixed connection are around the outer wall of base, and the expansion plate setting in the inside of protection shield bottom plate and with protection shield bottom plate swing joint.

As a preferred embodiment of the present invention: the cross section of base, rubber tube and power supply layer and megaphone is circular, and the expansion plate after the expansion surrounds around the outside of base, rubber tube and power supply layer and megaphone, and the appearance is the shape of cuboid, and the expansion plate that stretches out is higher than the sum of the height of base, rubber tube and power supply layer and megaphone.

As a preferred embodiment of the present invention: the inside fixedly connected with wireless signal receiver of the megaphone, the bottom of guard net is provided with sound generating mechanism, and the bottom surface one side fixedly connected with of sliding closure A hangs the board, and the bottom surface one side fixedly connected with of sliding closure B hangs the board.

As a preferred embodiment of the present invention: the control button is electrically connected with the wireless signal receiver through an electric wire, the wireless signal receiver is electrically connected with the battery through an electric wire, the wireless signal receiver is electrically connected with the central processing unit through an electric wire, the battery is electrically connected with the sound generating device through an electric wire, and the wireless signal receiver is electrically connected with the sound generating device through an electric wire.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model relates to an intelligent control public address set, through the protection shield bottom plate and the flexible sheet of swing joint at the inside of protection shield bottom plate all around with base fixed connection, people can stretch the expansion sheet and expand when not using this equipment, then through the axis of rotation with expansion sheet top fixed connection and through spout swing joint sliding closure A and sliding closure B at the axis of rotation surface, and set up draw-in groove and the cardboard of fixed connection at sliding closure B a side at sliding closure A side, just so make things convenient for people when not using this equipment, be in the same place sliding closure A and sliding closure B joint along the spout, and then get up the top of this equipment with protecting all around, still play dirt-proof effect simultaneously and avoided carrying the problem that this equipment received the damage in-process, people just can be when using this equipment, open sliding closure A and sliding closure B after again, just can hang the board through a side of fixed connection sliding closure A and sliding closure B bottom surface with sliding closure B and fix sliding closure A and sliding closure B with At the expansion plate top surface, thereby avoided traditional operation of uncapping still to need to cause the problem that the closing cap is lost easily with the equipment separation, rubber tube through fixed connection at the base top surface and the fixed connection board with rubber tube top fixed connection, people just can be according to the hobby of oneself, external force through applying the vertical direction to one side of rubber tube just can compress the rubber tube of this one side downwards, can upwards extend simultaneously with the relative one side of this one side, make this megaphone form certain angle of inclination, and then people just can adjust out suitable position of oneself, set up at the inside flexible post of rubber tube and with flexible post welded ball and with ball surface swing joint's swivelling chute, can play the effect of support to this equipment after people's rotation, thereby improved the stability of this equipment when using, through the pneumatic pump of fixed connection in drawer side and set up at the inside hose groove of drawer and ash storage tank and set up the inside inhaling of hose groove Head and hose, people just can be when this equipment has fallen the dust, pull out the drawer through the pulling hand (hold), take out suction head and hose, press the dust absorption button simultaneously and start the pneumatic pump, aim at the position that needs the dust of gettering through pulling the hose, just so can clear away the dust on this equipment, both made things convenient for people to clean at any time, the life of this equipment has also been prolonged, through placing the reserve battery at the reserve tank, just so make things convenient for people when equipment does not have the electricity, carry out the battery replacement at any time, just so solved people's public address that the equipment electricity can't use of going out.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a front view of an intelligent control loudspeaker device for unfolding internal details;

FIG. 2 is a schematic diagram of a front view of the internal details of an intelligent control loudspeaker;

FIG. 3 is a schematic diagram of a side-view internal detail structure of an intelligent control sound amplifying device;

FIG. 4 is a schematic diagram of a structure for intelligently controlling the local amplification at the baffle in the sound amplifying device;

FIG. 5 is a schematic view of a structure for intelligently controlling the local enlargement of a hose in a sound amplifying device;

fig. 6 is a schematic structural diagram of a sphere local amplification in an intelligent control loudspeaker device.

Fig. 7 is a schematic diagram of a circuit connection structure of an intelligent control loudspeaker device.

In the figure: 1-a sliding closure A; 2-clamping plate; 3-a sliding cover B; 4-a telescopic plate; 5-protecting the board bottom; 6-drawer; 7-a rubber tube; 8-a protection net; 9-a sound generating device; 10-a control button; 11-a wireless signal receiver; 12-a loudspeaker; 13-a power supply layer; 14-a spare groove; 15-telescopic column; 16-a battery; 17-a central processing unit; 18-fixing the connecting plate; 19-a card slot; 20-a suspension plate; 21-a rotating shaft; 22-a chute; 23-a suction head; 24-a fixing frame; 25-a hose; 26-hose groove; 27-ash storage tank; 28-round balls; 29-a rotating trough; 30-a handle; 31-dust-suction button; 32-pneumatic pump; 33-base.

Detailed Description

Referring to fig. 1 to 7, in an embodiment of the present invention, an intelligent control sound amplifying device includes a sound amplifier 12, a sliding cover a1 and a rubber tube 7, a clamping groove 19 is disposed on one side of the sliding cover a1, a clamping plate 2 is sleeved inside the clamping groove 19, one side surface of the clamping plate 2 is fixedly connected to a sliding cover B3, a sliding groove 22 is disposed on a bottom surface of the sliding cover a1, a sliding groove 22 is disposed on a bottom surface of the sliding cover B3, a protection net 8 is fixedly connected to a bottom surface of the sound amplifier 12, a sound generator 9 is fixedly connected to the inside of the sound amplifier 12, a central processor 17 is disposed at a bottom of the sound generator 9, a wireless signal receiver 11 is disposed on one side of the central processor 17, a control button 10 is fixedly connected to an outer surface of the sound amplifier 12, a power supply layer 13 is fixedly connected to a bottom surface of the sound amplifier, the bottom surface of the power supply layer 13 is provided with a fixed connection plate 18, the inside of the rubber tube 7 is provided with a telescopic column 15, the top end of the telescopic column 15 is welded with a round ball 28, the outer wall of the round ball 28 is movably connected with a rotary groove 29, the outer surface of the rotary groove 29 is fixedly connected with the power supply layer 13, one end of the rubber tube 7 far away from the fixed connection plate 18 is fixedly connected with a base 33, the inside of the base 33 is provided with a standby groove 14, one side of the standby groove 14 is provided with an air pressure pump 32, the air pressure pump 32 is fixedly connected with a drawer 6 at one side far away from the standby groove 14, the front side surface of the drawer 6 is movably connected with a handle 30, the inside of the drawer 6 is provided with a hose groove 26, the back surface of the hose groove 26 is fixedly connected with an ash storage groove 27, the inside front side surface of the hose groove 26 is fixedly connected with, one end of the suction head 23 is fixedly connected with a hose 25, and the output end of the hose 25 is movably connected with a dust storage groove 27.

Wherein, one side of sliding closure A1 is provided with draw-in groove 19, cardboard 2 has been cup jointed to draw-in groove 19's inside, the purpose makes more durable that sliding closure A1 and sliding closure B3 are connected, a side and sliding closure B3 fixed connection of cardboard 2, sliding closure A1's bottom surface is provided with spout 22, sliding closure B3's bottom surface is provided with spout 22, the purpose makes things convenient for people to open sliding closure A1 and sliding closure B3 fast, the bottom surface fixedly connected with guard net 8 of megaphone 12, be used for protecting the inside device of megaphone 12, the inside fixedly connected with sound generating mechanism 9 of megaphone 12, play the effect of raising one's voice.

Referring to fig. 1 and 3 in this embodiment, a dust collection button 31 is fixedly connected to a front side surface of the base 33, an outer surface of the base 33 is fixedly connected to the protection plate bottom plate 5, an expansion plate 4 is movably connected to an inside of the protection plate bottom plate 5, and a rotation shaft 21 is fastened to a top surface of the expansion plate 4.

Wherein, the leading flank fixedly connected with dust absorption button 31 of base 33 for open pneumatic pump 32, the inside swing joint of protection shield bottom plate 5 has expansion plate 4, mainly used protection still speaker and the space saving, the top surface joint of expansion plate 4 has axis of rotation 21, makes things convenient for sliding closure A1 and sliding closure B3 to slide.

In this embodiment, referring to fig. 2, 3 and 4, the outer surface of the rotating shaft 21 is disposed inside the sliding groove 22, the rotating groove 29 is clamped inside the fixed connecting plate 18, the bottom surface of the telescopic column 15 is fixedly connected with the center of the top surface of the base 33, the protection net 8 is arc-shaped, and the top end of the rubber tube 7 is fixedly connected with the fixed connecting plate 18.

Wherein, the inside at fixed connection board 18 is connected to the swivelling chute 29 joint, makes things convenient for people can be more stable rotation when this equipment angle of adjustment, and the bottom surface of flexible post 15 and the top surface center fixed connection of base 33 play fine supporting role to this equipment.

In this embodiment, referring to fig. 1, fig. 3 and fig. 4, there are two rotating shafts 21, two rotating shafts 21 are connected to the top ends of two telescopic plates 4 in a snap-fit manner, eight telescopic plates 4 are provided, four protective plate bottom plates 5 are provided, the four protective plate bottom plates 5 are fixedly connected to the periphery of the outer wall of the base 33, and the telescopic plates 4 are arranged inside the protective plate bottom plate 5 and movably connected to the protective plate bottom plate 5.

Wherein, the number of expansion plate 4 has eight, and the number of protection shield bottom plate 5 has four, and four protection shield bottom plate 5 fixed connection are around the outer wall of base 33, can be more family tight like this protect around this equipment, and expansion plate 4 sets up in protection shield bottom plate 5 inside and with protection shield bottom plate 5 swing joint, saves the required space that occupies, conveniently carries the use.

In this embodiment, referring to fig. 1, fig. 2 and fig. 3, the cross-section of the base 33, the rubber tube 7, the power supply layer 13 and the loudspeaker 12 is circular, the expanded expansion plate 4 surrounds the outer periphery of the base 33, the rubber tube 7, the power supply layer 13 and the loudspeaker 12, the outer shape is a rectangular parallelepiped, and the expanded expansion plate 4 is higher than the sum of the heights of the base 33, the rubber tube 7, the power supply layer 13 and the loudspeaker 12.

The expanded expansion plate 4 surrounds the outside of the base 33, the rubber tube 7, the power supply layer 13 and the loudspeaker 12, the expanded expansion plate 4 can prevent dust pollution, the expanded expansion plate 4 is higher than the sum of the heights of the base 33, the rubber tube 7, the power supply layer 13 and the loudspeaker 12, and people can conveniently close the sliding cover A1 and the sliding cover B3 to protect the top surface of the equipment.

Referring to fig. 1, 2 and 4 in this embodiment, a wireless signal receiver 11 is fixedly connected inside the microphone 12, a sound generating device 9 is disposed at the bottom of the protection net 8, a suspension plate 20 is fixedly connected to one side of the bottom surface of the sliding cover a1, and a suspension plate 20 is fixedly connected to one side of the bottom surface of the sliding cover B3.

The inside fixedly connected with wireless signal receiver 11 of megaphone 12 for carry out wireless connection with the smart mobile phone, the bottom surface one side fixedly connected with of sliding closure A1 hangs board 20 for fix fixed live sliding closure A1 after opening, the bottom surface one side fixedly connected with of sliding closure B3 hangs board 20, is used for fix fixed live sliding closure B3 after opening.

Referring to fig. 7 in this embodiment, the control button 10 is electrically connected to the wireless signal receiver 11 through a wire, the wireless signal receiver 11 is electrically connected to the battery 16 through a wire, the wireless signal receiver 11 is electrically connected to the central processing unit 17 through a wire, the battery 16 is electrically connected to the sound generating device 9 through a wire, and the wireless signal receiver 11 is electrically connected to the sound generating device 9 through a wire.

The wireless signal receiver 11 is electrically connected to the battery 16 through an electric wire for providing power to the device, the battery 16 is electrically connected to the sound generator 9 through an electric wire, and the wireless signal receiver 11 is electrically connected to the sound generator 9 through an electric wire for mainly performing a speaker operation on the received sound signal.

It should be noted that the utility model relates to an intelligent control public address set, which comprises a 1-sliding cover A; 2-clamping plate; 3-a sliding cover B; 4-a telescopic plate; 5-protecting the board bottom; 6-drawer; 7-a rubber tube; 8-a protection net; 9-a sound generating device; 10-a control button; 11-a wireless signal receiver; 12-a loudspeaker; 13-a power supply layer; 14-a spare groove; 15-telescopic column; 16-a battery; 17-a central processing unit; 18-fixing the connecting plate; 19-a card slot; 20-a suspension plate; 21-a rotating shaft; 22-a chute; 23-a suction head; 24-a fixing frame; 25-a hose; 26-hose groove; 27-ash storage tank; 28-round balls; 29-a rotating trough; 30-a handle; 31-dust-suction button; 32-pneumatic pump; 33-base.

The components are standard parts in general or known to those skilled in the art, and their structure and principle are known to those skilled in the art through technical manuals or through routine experimentation.

The utility model discloses a theory of operation is: firstly, through the protection board bottom plate 5 fixedly connected with the periphery of the base 33 and the expansion board 4 movably connected inside the protection board bottom plate 5, people can stretch and unfold the expansion board 4 when not using the device, then through the rotating shaft 21 fixedly connected with the top end of the expansion board 4, the sliding cover A1 and the sliding cover B3 movably connected with the outer surface of the rotating shaft 21 through the sliding chute 22, and the card slot 19 arranged on one side surface of the sliding cover A1 and the card board 2 fixedly connected with one side surface of the sliding cover B3, so that when not using the device, people can conveniently clamp the sliding cover A1 and the sliding cover B3 together along the sliding chute 22, when using the device, people can fix the sliding cover A1 and the sliding cover B3 on the top surface of the expansion board 4 through the suspension board 20 fixedly connected with one side surface of the bottom surfaces of the sliding cover A1 and the sliding cover B3 after opening the sliding cover A1 and the sliding cover B3, and fix the rubber tube 7 fixedly connected with the top end of the, according to the preference of a user, the rubber tube 7 on one side of the rubber tube 7 is compressed downwards by applying a vertical external force to the side, the side opposite to the side is extended upwards at the same time, so that the loudspeaker forms a certain inclination angle, and the user can adjust a proper position, the telescopic column 15 arranged in the rubber tube 7, the round ball 28 welded with the telescopic column 15 and the rotary groove 29 movably connected with the surface of the round ball 28 support the equipment, then the user can pull out the drawer 6 by pulling the suction head 30 to take out the suction head 23 and the hose 25 by the pneumatic pump 32 fixedly connected with one side of the drawer 6, the hose groove 26 and the dust storage groove 27 arranged in the drawer 6 and the suction head 23 and the hose 25 arranged in the hose groove 26 when the equipment has dust, and simultaneously press the dust collection button 31 to start the pneumatic pump 32, dust removal is performed by pulling the hose 25 to align the suction head 23 with the location where dust is to be sucked, and if the apparatus is not powered, one can replace the battery 16 by removing the backup battery placed in the backup tank 14.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (7)

1. The intelligent control public address device comprises a public address (12), a sliding cover A (1) and a rubber tube (7), and is characterized in that a clamping groove (19) is arranged on one side of the sliding cover A (1), a clamping plate (2) is sleeved inside the clamping groove (19), one side face of the clamping plate (2) is fixedly connected with a sliding cover B (3), a sliding groove (22) is arranged on the bottom face of the sliding cover A (1), a sliding groove (22) is arranged on the bottom face of the sliding cover B (3), a protection net (8) is fixedly connected on the bottom face of the public address (12), a sound production device (9) is fixedly connected inside the public address (12), a central processing unit (17) is arranged at the bottom of the sound production device (9), a wireless signal receiver (11) is arranged on one side of the central processing unit (17), and a control button (10) is fixedly connected on the outer surface of the public, the loudspeaker is characterized in that a power supply layer (13) is fixedly connected to the bottom surface of the loudspeaker (12), a battery (16) is arranged inside the power supply layer (13), a fixed connecting plate (18) is arranged on the bottom surface of the power supply layer (13), a telescopic column (15) is arranged inside the rubber tube (7), a round ball (28) is welded at the top end of the telescopic column (15), a rotary groove (29) is movably connected to the outer wall of the round ball (28), the outer surface of the rotary groove (29) is fixedly connected with the power supply layer (13), a base (33) is fixedly connected to one end, far away from the fixed connecting plate (18), of the rubber tube (7), a standby groove (14) is arranged inside the base (33), a pneumatic pump (32) is arranged on one side of the standby groove (14), a drawer (6) is fixedly connected to one side, far away from the standby groove (14), of the pneumatic, the utility model discloses a portable dust collector, including drawer (6), front side swing joint has hand (hold) 30, the inside of drawer (6) is provided with hose groove (26), back fixedly connected with ash storage groove (27) of hose groove (26), inside front side fixedly connected with mount (24) of hose groove (26), suction head (23) have been cup jointed to the inside of mount (24), the one end and hose (25) fixed connection of suction head (23), the output and the ash storage groove (27) swing joint of hose (25).

2. The intelligent control sound amplification device as claimed in claim 1, wherein a dust collection button (31) is fixedly connected to the front side of the base (33), the outer surface of the base (33) is fixedly connected to the protection plate base plate (5), the interior of the protection plate base plate (5) is movably connected to a telescopic plate (4), and a rotating shaft (21) is clamped to the top surface of the telescopic plate (4).

3. The intelligent control sound amplification device as claimed in claim 2, wherein the outer surface of the rotating shaft (21) is arranged inside the sliding groove (22), the rotating groove (29) is clamped inside the fixed connecting plate (18), the bottom surface of the telescopic column (15) is fixedly connected with the center of the top surface of the base (33), the protection net (8) is arc-shaped, and the top end of the rubber tube (7) is fixedly connected with the fixed connecting plate (18).

4. The intelligent control sound amplification device as claimed in claim 2, wherein the number of the rotation shafts (21) is two, the two rotation shafts (21) are connected with the top ends of the two expansion plates (4) in a clamping manner, the number of the expansion plates (4) is eight, the number of the protection plate bottom plates (5) is four, the four protection plate bottom plates (5) are fixedly connected around the outer wall of the base (33), and the expansion plates (4) are arranged inside the protection plate bottom plates (5) and are movably connected with the protection plate bottom plates (5).

5. An intelligent control public address set according to claim 1, wherein the cross section of the base (33), the rubber tube (7), the power supply layer (13) and the public address set (12) is circular, the expanded expansion plate (4) surrounds the outer periphery of the base (33), the rubber tube (7), the power supply layer (13) and the public address set (12), the shape of the expansion plate is cuboid, and the expanded expansion plate (4) is higher than the sum of the heights of the base (33), the rubber tube (7), the power supply layer (13) and the public address set (12).

6. The intelligent control public address system according to claim 1, wherein a wireless signal receiver (11) is fixedly connected inside the public address system (12), a sound generating device (9) is arranged at the bottom of the protective net (8), a suspension plate (20) is fixedly connected to one side of the bottom surface of the sliding cover A (1), and a suspension plate (20) is fixedly connected to one side of the bottom surface of the sliding cover B (3).

7. The intelligent control sound amplification device according to claim 1, wherein the control button (10) is electrically connected to the wireless signal receiver (11) through a wire, the wireless signal receiver (11) is electrically connected to the battery (16) through a wire, the wireless signal receiver (11) is electrically connected to the central processing unit (17) through a wire, the battery (16) is electrically connected to the sound generation device (9) through a wire, and the wireless signal receiver (11) is electrically connected to the sound generation device (9) through a wire.

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