Multifunctional loudspeaker device for construction site

By configuring a power installation window and power inverter output components on the loudspeaker device, the problems of difficulty in using electricity for loudspeaker equipment on construction sites and difficulty in charging workers' equipment are solved, and a convenient power supply and charging solution is achieved.

CN223391444UActive Publication Date: 2025-09-26SHENZHEN JIEMEISI IND CO LTD
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Patent Information

Application Number
CN202422632784.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-30
Publication Date
2025-09-26
Estimated Expiration
2034-10-30

AI Technical Summary

Technical Problem

Existing construction site loudspeaker equipment has difficulty in using electricity and workers have difficulty charging their mobile devices. Existing mobile power supplies are only suitable for electrical tools and cannot meet the power needs of loudspeaker equipment.

Method used

A multifunctional loudspeaker device is designed, which is equipped with a power installation window and a power input plug, can be connected to an external power supply, and is equipped with a power inverter output component to invert the external power supply into AC power for use by the loudspeaker component and external devices.

Benefits of technology

It realizes the convenient use of electricity for construction site sound equipment and charging of workers' mobile devices, solves the problem of difficulty in using electricity for construction site speakers, and improves the convenience of the construction site.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a multifunctional loudspeaking device for a construction site. The multifunctional loudspeaking device comprises a shell, a loudspeaking assembly and a power supply inversion output assembly. The shell comprises a power supply mounting window arranged on a shell main body, and the power supply mounting window is provided with a power supply input plug used for being electrically connected with an external power supply; the loudspeaking assembly is arranged in the shell, and the loudspeaking assembly is electrically connected with the power supply input plug; the power supply inversion output assembly is electrically connected with the power supply input plug, and the power supply input plug can be connected with an external power supply to supply power to the loudspeaking assembly and the power supply inversion output assembly; the power supply inversion output assembly comprises a power supply output plug, and the power supply output plug can supply power to external electric equipment. A power supply mounting window and a power supply input plug used for being electrically connected with an external power supply are arranged on the shell; the problem of difficult power utilization of the construction site loudspeaker box is solved; wherein the power supply inversion output assembly can invert direct current into alternating current, and the alternating current can supply power to external electric equipment through the power supply output plug.
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Description

Technical Field

[0001] The utility model relates to a multifunctional sound-raising device for construction sites, belonging to the technical field of loudspeakers. Background Art

[0002] On field construction sites, each project team is equipped with loudspeakers. These systems are used to broadcast safety warnings, coordinate work, provide entertainment and relaxation, improve work efficiency, and promote site publicity. These loudspeakers play a vital role on construction sites, helping to ensure worker safety, enhance work efficiency, and improve the overall image of the site.

[0003] Currently, the common practice is to use conventional speakers, connected to generators and powered by electricity, which makes it difficult to power the speakers and workers' mobile devices. Existing construction site power drills are equipped with replaceable mobile power banks, which are usually stored before construction and can only be used with electrical tools. Therefore, there is an urgent need for a multifunctional construction site speaker device that can adapt to the mobile power banks of electrical tools and output power to charge workers' mobile devices. Utility Model Content

[0004] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a multifunctional loudspeaker device for use on construction sites, wherein the housing is provided with a power installation window and a power input plug for electrically connecting to an external power source; the external power source can be connected to the power input plug to solve the problem of difficulty in supplying electricity to the speakers on the construction site; a power inverter output component is also provided, the power inverter output component includes a power output plug, and the power inverter output component can invert the external power source into AC power, which can be used to supply power to external electrical equipment via the power output plug.

[0005] To achieve the above-mentioned objectives, the present invention provides a multifunctional loudspeaker device for use on construction sites, comprising: a housing, the housing being provided with a power supply installation window, the power supply installation window penetrating at least one side wall of the housing, the power supply installation window communicating with an interior space of the housing, the power supply installation window being used for allowing an external power supply to be installed in the housing; a power input plug, the power input plug being provided on the housing and disposed in the power supply installation window, the power input plug being used to electrically connect to an external power supply installed in the housing; a loudspeaker assembly, the loudspeaker assembly being provided in the housing and electrically connected to the power input plug; a power inverter output assembly, the power inverter output assembly being electrically connected to the power input plug, the power inverter output assembly including a power output plug, the power output plug being used to electrically connect to an external electrical device; the power input plug being capable of connecting to an external power source to power the loudspeaker assembly and the power inverter output assembly, and the power inverter output assembly being capable of powering the external electrical device through the power output plug.

[0006] Furthermore, as a more preferred embodiment of the present invention, the power inverter output component includes an inverter and a filter, the inverter is electrically connected to the filter, the inverter is used to convert the direct current transmitted by the power input plug into alternating current, the filter is used to filter the alternating current converted from the direct current by the inverter, and the power output plug is used to transmit the alternating current filtered by the filter to an external electrical device.

[0007] Furthermore, as a more preferred embodiment of the present invention, the speaker assembly includes:

[0008] a speaker, disposed on a side wall of the housing;

[0009] An audio processor electrically connected to the speaker; the audio processor is used to perform sound effect processing on the audio information and transmit the processing result to the speaker for output by the speaker;

[0010] A storage unit is connected to the audio processor and is used to store audio information output by the audio processor.

[0011] Furthermore, as a more preferred embodiment of the present invention, the speaker assembly further includes:

[0012] a wireless transmission unit, the wireless transmission unit being wirelessly connected to the audio processor; and / or

[0013] a human-computer interaction unit, the human-computer interaction unit being electrically connected to the audio processor; and / or

[0014] The wireless broadcast sound receiving unit is electrically connected to the audio processor and is used to receive and process wireless broadcast signals so that the signals can be played.

[0015] Furthermore, as a more preferred embodiment of the present invention, the shell also includes a power supply cover, the power supply installation window is recessed in one side surface of the shell, the power supply cover is detachably connected to the shell, and the power supply cover can open and close the power supply installation window.

[0016] Furthermore, as a more preferred embodiment of the present invention, the shell includes a first closing cover and a second closing cover, and the first closing cover and the second closing cover are detachably connected; at least a portion of the speaker assembly is arranged on the first closing cover or the second closing cover; and the power supply installation window is arranged on the second closing cover or the first closing cover.

[0017] Furthermore, as a more preferred embodiment of the present invention, the housing further includes a third closing cover and a fourth closing cover, wherein the third closing cover is arranged on the top of the first closing cover and the second closing cover, and is detachably connected to the first closing cover and the second closing cover respectively; the fourth closing cover is arranged on the bottom of the first closing cover and the second closing cover, and is detachably connected to the first closing cover and the second closing cover respectively;

[0018] The third cover is used for installing the human-computer interaction part and the wireless broadcast receiving part of the speaker assembly; the fourth cover is used for installing the speaker of the speaker assembly.

[0019] Furthermore, as a more preferred embodiment of the present invention, the housing further includes:

[0020] a first guardrail member, the guardrail member being detachably connected to the top of the third closing cover, the first guardrail member being larger than the third closing cover; and / or

[0021] The second guardrail piece is detachably connected to the bottom of the fourth closing cover, and the size of the second guardrail piece is larger than that of the fourth closing cover.

[0022] Furthermore, as a more preferred embodiment of the present invention, the first guardrail member or the second guardrail member includes a ring-shaped guardrail portion and at least two transit connection portions for detachably connecting the guardrail portion with the third closing cover or the fourth closing cover.

[0023] Furthermore, as a more preferred embodiment of the present invention, the first guardrail member or the second guardrail member includes a handle portion, and the first closing cover and / or the second closing cover are respectively provided with a movable hand-carrying groove, and the position of the movable hand-carrying groove corresponds to the position of the handle portion.

[0024] Furthermore, as a more preferred embodiment of the present invention, the power supply cover includes a rotating connection portion arranged on one side of the power supply cover body and a snap-fit ​​portion arranged on the other side of the power supply cover body, the rotating connection portion is rotatably connected to one side of the power supply installation window, and the snap-fit ​​portion is snap-fitted to the other side of the power supply installation window.

[0025] A multifunctional loudspeaker device for construction sites has a housing equipped with a power supply installation window and a power input plug for electrically connecting to an external power source. The external power source can be connected to the power input plug and stored within the power installation window, solving the problem of power shortage for speakers on construction sites. The multifunctional loudspeaker device for construction sites also includes a power inverter output assembly for inverting direct current (DC) power provided by the external power source into alternating current (AC) power output. The power inverter output assembly includes a power output plug and is capable of inverting DC power into AC power, which can then be supplied to external electrical equipment via the power output plug. This allows construction workers working in the field to more conveniently use the loudspeaker device and power source. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of a multifunctional loudspeaker device for use on a construction site in an embodiment.

[0027] Figure 2 1 is a structural block diagram of a multifunctional loudspeaker device for use on a construction site in an embodiment.

[0028] Figure 3 Schematic diagram of the structure of the housing and the power cover in the embodiment.

[0029] Figure 4 Schematic diagram of the expanded structure of the multifunctional loudspeaker device for use on a construction site in the embodiment.

[0030] Figure 5 Schematic diagram of the overall structure of the multifunctional loudspeaker device for construction sites in the embodiment.

[0031] Reference numerals:

[0032] 1-shell, 11-power installation window, 12-power cover, 121-rotating connection part, 1211-rotating shaft, 122-buckle part, 111-power input plug, 13-locking slot, 14-first closing cover, 15-second closing cover, 16-third closing cover, 17-fourth closing cover, 18-first guardrail, 181-guardrail part, 182-transfer connection part, 183-handle part, 184-portable movable slot, 19-second guardrail; 2-speaker assembly, 21-speaker, 22-audio processor, 23-input and output module, 24-storage unit, 25-wireless transmission unit, 26-human-computer interaction part, 27-wireless broadcast receiving part; 3-power inverter output assembly, 31-power output plug. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0034] It should be noted that when an element is referred to as being “fixed on” or “set on” another component, it can be directly on the other component or indirectly set on the other component; when a component is referred to as being “connected to” another component, it can be directly connected to the other component or indirectly connected to the other component.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0037] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0038] Example

[0039] This embodiment aims to address the existing difficulties in obtaining electricity for construction site speakers and the difficulty in charging workers' mobile devices. To this end, this embodiment provides a multifunctional speaker device for construction sites. Its housing 1 is equipped with a power supply installation window 11 and a power input plug 111 for electrically connecting to an external power source. The external power source can be connected to the power input plug 111, thereby resolving the problem of difficulty in obtaining electricity for construction site speakers. The device also includes a power inverter output assembly 3, which includes a power output plug 31. The power inverter output assembly 3 can invert the external power source into AC power, which can then be used to supply power to external electrical devices via the power output plug 31.

[0040] Reference Figure 1 As shown, a multifunctional loudspeaker device for use on a construction site includes a housing 1 , a loudspeaker assembly 2 and a power inverter output assembly 3 .

[0041] Among them, the shell 1 is provided with a power supply installation window 11, which passes through at least one side wall of the shell. The power supply installation window 11 is connected to the internal space of the shell 1, and the power supply installation window 11 is used for an external power supply to be installed on the shell; it should be added that the external power supply used in this embodiment is a mobile power supply equipped with power tools on the construction site. For example, among the power tools, electric drills, construction workers will charge the backup power supplies of all electric drills before construction, and then transport them to the construction site, waiting for call.

[0042] The power input plug 111 is provided on the housing 1 and is provided in the power installation window 11. The power input plug 111 is used to electrically connect to an external power source installed in the housing.

[0043] The speaker assembly 2 is disposed in the housing 1 and is electrically connected to the power input plug 111 . When the power input plug 111 is connected to an external power source, power can be supplied to the speaker assembly 2 , and the speaker assembly 2 can start working.

[0044] Reference Figure 2As shown, the speaker assembly 2 includes: a speaker 21, which is arranged on the side wall of the shell 1; illustratively, the speaker 21 can be a speaker in the prior art, which serves as a sound conversion device, and its core function is to convert electrical signals into sound signals.

[0045] The audio processor 22 is electrically connected to the speaker 21; the audio processor 22 is used to perform sound effect processing on the audio information and transmit the processing results to the speaker 21 for output by the speaker 21; the audio processor 22 is responsible for receiving and processing the audio information. It should be supplemented that the audio processor 22 also includes a decoder for decoding compressed audio data (such as MP3, WAV and other formats) into original audio information. In addition, the audio processor 22 may also include a digital signal processing (DSP) function for performing various processing on the audio information, such as equalization, filtering, noise reduction, etc., to improve the sound quality or adapt to different playback environments. It should be supplemented that the audio processor 22 also includes an amplification module for amplifying the processed audio information to a sufficient level to drive the speaker 21 or other audio output devices. Exemplarily, the amplification module uses a power amplifier that can amplify a small signal to a power level sufficient to drive the speaker 21 to produce sound.

[0046] Further, refer to Figure 2 As shown, the speaker assembly 2 also includes an input / output module 23 electrically connected to the audio processor 22, responsible for connecting the multifunctional construction site speaker system to external devices. The input module may include an audio input interface (e.g., a 3.5mm jack, USB port, etc.) for receiving audio information from other devices (e.g., mobile phones, computers, etc.). The output module may include a headphone jack, Bluetooth transmitter, etc. for transmitting audio information to external devices (e.g., headphones, speakers, etc.) for playback.

[0047] The storage unit 24 is connected to the audio processor 22 and is used to store the audio information output by the audio processor 22. It should be noted that the storage unit 24 is used to store audio files, for example, a common TF card or SD card, and audio content is loaded by inserting these memory cards.

[0048] It should be noted that, referring to Figure 1As shown, in a multifunctional loudspeaker device for construction sites, the power inverter output assembly 3 is electrically connected to a power input plug 111. The power input plug 111 can connect to an external power source to power the loudspeaker assembly 2 and the power inverter output assembly 3. The power inverter output assembly 3 includes a power output plug 31, which can supply power to external electrical devices. The power input plug 31 can connect to an external power source to power the loudspeaker assembly 2 and the power inverter output assembly 3, and the power inverter output assembly 3 can also supply power to external electrical devices through the power output plug 31. The power output plug 31 includes, but is not limited to, one or more combinations of a USB port, a Type-C port, a Type-A port, a Lightning port, or an AC outlet, and is used to provide construction workers with appropriate interface power.

[0049] Further, refer to Figure 2 As shown, the speaker assembly 2 also includes: a wireless transmission unit 25, which is wirelessly connected to the audio processor 22; illustratively, the wireless transmission unit 25 can use a Bluetooth module, which can be matched and connected with an external mobile device through the Bluetooth module to transmit audio information to the multi-functional speaker device used at the construction site for playback.

[0050] Further, refer to Figure 2 and 3 As shown, the speaker assembly 2 also includes: a human-computer interaction unit 26, which is electrically connected to the audio processor 22; it should be noted that the human-computer interaction unit 26 is responsible for processing user input, including buttons, touch screens, microprocessors, microcontrollers or other user interfaces for controlling the operation of the player, such as play, pause, stop, volume adjustment and other control commands.

[0051] Reference Figure 2 and 3 As shown, a wireless broadcast receiver 27 is electrically connected to the audio processor 22 and is used to receive and process wireless broadcast signals for playback. For example, the wireless broadcast receiver 27 utilizes a radio with an antenna, utilizing electrical energy to convert radio wave signals into audible audio information. This is conventional technology, and its operating principle will not be described in detail here.

[0052] It should be added that the power inverter output component 3 includes an inverter and a filter. The inverter is electrically connected to the filter. The inverter is used to convert the direct current transmitted by the power input plug 111 into alternating current. The filter is used to filter the alternating current converted from the direct current by the inverter. The power output plug 31 is used to transmit the alternating current filtered by the filter to external electrical equipment.

[0053] Reference Figure 3As shown, the housing 1 further includes a power cover 12, and the power installation window 11 is recessed in one side surface of the housing 1. The power cover 12 is detachably connected to the power installation window 11. The power installation window 11 can accommodate an external power supply in the housing 1 and is covered by the power cover 12. The power cover 12 can open and close the power installation window 11. Figure 3 As shown, the power cover 12 includes a rotating connection portion 121 arranged on one side of the power cover 12 main body and a snap-fit ​​portion 122 arranged on the other side of the power cover 12 main body. The rotating connection portion 121 is rotatably connected to one side of the power installation window 11 through a rotating shaft 1211, and the snap-fit ​​portion 122 is snap-fitted to the other side of the power installation window 11. The power installation window 11 is provided with a locking slot 13 adapted to the snap-fit ​​portion 122.

[0054] Reference Figure 4 and 5 As shown, the shell 1 includes a first closing cover 14 and a second closing cover 15, which are detachably connected; at least a portion of the speaker assembly 2 is arranged on the first closing cover 14 or the second closing cover 15; and the power supply installation window 11 is arranged on the second closing cover 15 or the first closing cover 14.

[0055] Reference Figure 4 and 5 As shown, the shell 1 also includes a third closing cover 16 and a fourth closing cover 17. The third closing cover 16 is arranged on the top of the first closing cover 14 and the second closing cover 15, and is detachably connected to the first closing cover 14 and the second closing cover 15 respectively; the fourth closing cover 17 is arranged on the bottom of the first closing cover 14 and the second closing cover 15, and is detachably connected to the first closing cover 14 and the second closing cover 15 respectively; the third closing cover 16 is used to install the human-computer interaction part 26 and the wireless broadcast receiving part 27; the fourth closing cover 17 is used to install the speaker 21, forming a humanized speaker layout.

[0056] Reference Figure 4 and 5 As shown, the housing 1 further includes: a first guardrail 18, which is detachably connected to the top of the third closing cover 16 and is larger in size than the third closing cover 16; and / or a second guardrail 19, which is detachably connected to the bottom of the fourth closing cover 17 and is larger in size than the fourth closing cover 16. The first guardrail 18 and the second guardrail 19 are both larger in size than the third closing cover 16 and the fourth closing cover 17. In the event of tipping or collision, the first guardrail 18 and the second guardrail 19 will be preferentially contacted, thereby providing good protection for components on the first closing cover 14, the second closing cover 15, the third closing cover 16, and the fourth closing cover 17.

[0057] Reference Figure 4 and 5As shown, the first guardrail member 18 or the second guardrail member 19 includes an annular guardrail portion 181 and at least two intermediate connecting portions 182 for detachably connecting the guardrail portion 181 to the third closing cover 16 or the fourth closing cover 17. For example, this embodiment may employ two symmetrically arranged intermediate connecting portions 182. The guardrail portion 181 may be an annular shape formed by two U-bars detachably connected to the two sides of the intermediate connecting portion 182.

[0058] Reference Figure 1 、 3 As shown in FIG4 , the first guardrail member 18 or the second guardrail member 19 includes a handle portion 183 , and the first closing cover 14 and / or the second closing cover 15 are respectively provided with a portable movable groove 184 , and the position of the portable movable groove 184 corresponds to the position of the handle portion 183 .

[0059] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional loudspeaker device for construction sites, characterized in that: include: a housing, the housing being provided with a power supply installation window, the power supply installation window penetrating at least one side wall of the housing, the power supply installation window being in communication with an interior space of the housing, and the power supply installation window being used for installing an external power supply into the housing; A power input plug is provided on the housing and disposed in a power supply installation window, and is used to electrically connect to an external power supply installed in the housing; a speaker assembly, the speaker assembly being disposed in the housing and electrically connected to the power input plug; A power inverter output component, the power inverter output component is electrically connected to the power input plug, the power inverter output component includes a power output plug, and the power output plug is used to electrically connect to an external power device; The power input plug can be connected to an external power source to supply power to the speaker assembly and the power inverter output assembly, and the power inverter output assembly can supply power to an external power-consuming device through the power output plug.

2. The multifunctional loudspeaker device for construction sites according to claim 1, characterized in that: The power inverter output component includes an inverter and a filter. The inverter is electrically connected to the filter. The inverter is used to convert the direct current transmitted by the power input plug into alternating current. The filter is used to filter the alternating current converted from the direct current by the inverter. The power output plug is used to transmit the alternating current filtered by the filter to an external power-consuming device.

3. The multifunctional loudspeaker device for construction sites according to claim 1, characterized in that: The speaker assembly includes: a speaker, disposed on a side wall of the housing; An audio processor electrically connected to the speaker; the audio processor is used to perform sound effect processing on the audio information and transmit the processing result to the speaker for output by the speaker; A storage unit is connected to the audio processor and is used to store audio information output by the audio processor.

4. The multifunctional loudspeaker device for construction sites according to claim 3, characterized in that: The speaker assembly further includes: a wireless transmission unit, the wireless transmission unit being wirelessly connected to the audio processor; and / or a human-computer interaction unit, the human-computer interaction unit being electrically connected to the audio processor; and / or The wireless broadcast sound receiving unit is electrically connected to the audio processor and is used to receive and process wireless broadcast signals so that the signals can be played.

5. The multifunctional loudspeaker device for construction sites according to claim 1, characterized in that: The housing further comprises a power supply cover, the power supply installation window is recessed in a side surface of the housing, the power supply cover is detachably connected to the housing, and the power supply cover covers the power supply installation window so as to be openable and closable.

6. The multifunctional loudspeaker device for construction sites according to claim 1, characterized in that: The housing includes a first cover and a second cover, wherein the first cover and the second cover are detachably connected; at least a portion of the speaker assembly is disposed on the first cover or the second cover; The power supply installation window is arranged on the second closing cover or the first closing cover.

7. The multifunctional loudspeaker device for construction sites according to claim 6, characterized in that: The housing further includes a third closing cover and a fourth closing cover, wherein the third closing cover is disposed on the top of the first closing cover and the second closing cover and is detachably connected to the first closing cover and the second closing cover respectively; the fourth closing cover is disposed on the bottom of the first closing cover and the second closing cover and is detachably connected to the first closing cover and the second closing cover respectively; The third cover is used for installing the human-computer interaction part and the wireless broadcast receiving part of the speaker assembly; the fourth cover is used for installing the speaker of the speaker assembly.

8. The multifunctional loudspeaker device for construction sites according to claim 7, characterized in that: The housing further comprises: a first guardrail member, the guardrail member being detachably connected to the top of the third closing cover, the first guardrail member being larger than the third closing cover; and / or The second guardrail piece is detachably connected to the bottom of the fourth closing cover, and the size of the second guardrail piece is larger than that of the fourth closing cover.

9. The multifunctional loudspeaker device for construction sites according to claim 8, characterized in that: The first guardrail member or the second guardrail member includes a ring-shaped guardrail portion and at least two transfer connection portions for detachably connecting the guardrail portion with the third closing cover or the fourth closing cover.

10. The multifunctional loudspeaker device for construction sites according to claim 9, characterized in that: The first guardrail member or the second guardrail member includes a handle portion, and the first closing cover and / or the second closing cover are respectively provided with a movable hand-carrying slot, and the position of the movable hand-carrying slot corresponds to the position of the handle portion.