Construction site audio playback device, in particular construction site radio

Abstract

The invention relates to a construction site audio playback device, in particular a construction site radio, having an audio playback unit (12), having a control or regulation unit (14), having a battery interface (16) for detachably receiving a replaceable battery (18) without tools, the battery interface is provided in at least one operating state for supplying energy to the audio playback unit (12), and has at least one network operating interface (20), which is provided to be connected to an external network, in at least one operating state, the electrical network operating interface is provided for supplying energy to the audio playback unit (12). According to the invention, the network operating interface (20) is provided in at least one operating state for charging a replaceable battery (18) accommodated in the battery interface (16).

Description

Field of the Invention

[0001] The present invention relates to a construction site audio playback device, in particular to a construction site radio device. Background Art

[0002] There has been disclosed a construction site audio playback device, in particular a construction site radio device, which has an audio playback unit, a control or adjustment unit, a battery interface for removably accommodating a replaceable battery without tools, the battery interface being arranged in at least one operating state for supplying energy to the audio playback unit, and having at least one mains operation interface, the mains operation interface being arranged for connection to an external mains network, and the mains operation interface being arranged in at least one operating state for supplying energy to the audio playback unit. Summary of the Invention

[0003] The present invention is based on a construction site audio playback device, in particular a construction site radio device, which has an audio playback unit, a control or adjustment unit, a battery interface for removably accommodating a replaceable battery without tools, the battery interface being arranged in at least one operating state for supplying energy to the audio playback unit, and having at least one mains operation interface, the mains operation interface being arranged for connection to an external mains network, and the mains operation interface being arranged in at least one operating state for supplying energy to the audio playback unit.

[0004] It is proposed that the mains operation interface is arranged in at least one operating state for charging the replaceable battery accommodated at the battery interface. Preferably, the replaceable battery can not only be charged but also discharged via the battery interface. Preferably, the mains operation interface can be arranged in at least one operating state not only for charging only one replaceable battery accommodated in the battery interface, but also for charging the replaceable battery accommodated in the battery interface and simultaneously providing energy supply to the audio playback unit.

[0005] "Construction site audio playback device" should be understood in the context especially as a playback device for audio playback, for example especially for playing music. Preferably, the construction site audio playback device consists of a construction site radio device. However, it is also conceivable that the construction site audio playback device consists of, for example, Bluetooth and / or WLAN speakers. Preferably, the construction site audio playback device is suitable for use at the construction site due to being drop-proof, dust-proof and / or waterproof. Preferably, the construction site audio playback device includes an analog and / or digital radio receiver. Preferably, the construction site audio playback device includes a protective housing. "Protective housing" should be understood especially as a housing that encloses at least one electronic device of the protected construction site audio playback device arranged inside the construction site audio playback device. This protective housing especially connects and / or fixes different components of the construction site audio playback device. Preferably, this protective housing is arranged to protect the electronic device of the construction site audio playback device so that no functional limitations are caused when dropping from a height of at least 1 m. Advantageously, at least according to the protection class IP53, advantageously at least according to the protection class IP55, the radio device housing protects the interior from the environment.

[0006] Furthermore, in the context, "audio playback unit" should be understood especially as a unit that is arranged to process and play audio signals. Preferably, the audio playback unit includes electronic devices especially having a signal receiver and an amplifier, and at least one speaker. "Control and / or regulation unit" should be understood especially as a unit having at least one control electronic device. "Control electronic device" should be understood especially as a unit having a processor unit, a storage unit, and a unit having a running program stored in the storage unit.

[0007] "Battery interface" should be understood especially as an interface that is arranged to receive electrical energy from a replaceable battery, especially a hand tool battery. Preferably, the battery interface is arranged to mechanically fix the replaceable battery, especially a hand tool battery. Preferably, the battery interface is partly integrally constructed with the radio device housing, and more precisely, especially the part of the battery interface that mechanically fixes the replaceable battery, which is a hand tool battery. "Coupling" should be preferably understood as establishing a functional connection. Preferably, the construction site audio playback device has a battery accommodation area for spatially accommodating the replaceable battery of the battery interface.

[0008] "The battery accommodation area" shall be understood as the space predefined by the battery interface, which space is occupied by the replaceable battery in the state fixed to the battery interface. Preferably, the radio device housing is in particular in direct contact with the battery accommodation area. The battery accommodation area in particular includes a gap, which gap is arranged between the radio device housing and the replaceable battery coupled to the battery interface. Preferably, the battery accommodation area has a cuboid shape. In particular on at least one side, advantageously on at least two sides, particularly advantageously on three sides, the battery accommodation area is constructed to be open. The replaceable battery in particular consists of a power tool battery. "Power tool battery" shall in particular be understood as a battery which is provided for supplying at least one power tool with energy, particularly in predefined application cases. Preferably, the power tool battery is removably connectable to the power tool without tools in the ready-to-operate state.

[0009] "Grid operation interface" shall in the context in particular be understood as an electrical interface which is provided for connection to an external grid, for example in particular to a domestic power grid or a similar grid. The grid operation interface is provided in at least one operating state for supplying energy to the construction site audio playback device, in particular to the audio playback unit. Preferably, the grid operation interface is provided or for direct coupling to a power supply line or directly includes a power supply line. In particular preferably, the grid operation interface has a USB interface for supplying energy. Preferably, the grid operation interface is provided in operation to be supplied with direct current via the USB interface.

[0010] By virtue of the configuration of the construction site audio playback device according to the invention, a particularly advantageous and more flexible operation of the construction site audio playback device can be achieved. The construction site audio playback device can in particular advantageously operate with only one replaceable battery or without an additional charger, since the construction site audio playback device itself can be used as a charger. In addition, an additional charger does not have to be carried. In an advantageous embodiment, furthermore, the construction site audio playback device and the replaceable battery can be charged simultaneously. This can provide a particularly advantageous high level of user comfort.

[0011] Furthermore, the invention provides that the grid operation interface is provided in at least one operating state for supplying energy to the audio playback unit and the replaceable battery accommodated in the battery interface, in particular simultaneously. Preferably, the control or regulation unit is provided for supplying the audio playback unit and the battery interface with the energy of the grid operation interface during grid operation. Preferably, the control and regulation unit is provided for providing the audio playback unit with the required energy via the grid operation interface, wherein the excess energy of the grid operation interface is fed to the battery interface. The control and regulation unit is in particular for energy or power management. Thus, a particularly reliable operation of the audio playback unit and simultaneous charging of the replaceable battery can be provided. This can provide a particularly advantageous high level of user comfort.

[0012] Furthermore, the present invention proposes that the power grid operation interface is constituted by a USB-interface. The USB-C interface, in particular the USB Type-C interface, is herein a 24-pin USB interface for accommodating a USB-C cable. Preferably, the USB-C interface is used to connect to an external power grid via a USB-C cable. Preferably, the USB-C interface is herein particularly used to supply energy. Additionally, it is also conceivable that the USB-C interface is arranged to supply energy bidirectionally. Alternatively or additionally, it is also conceivable that additional data can be transmitted to or read from the construction site audio playback device via the USB-C interface. In particular, it is conceivable that audio data can be transmitted to the construction site audio playback device and / or the firmware of the construction site audio playback device can be updated via the USB-C interface. Herein, it is particularly advantageous to provide a standardized power grid operation interface. High performance is possible in particular via USB-C and the scope of application is expanded. USB-C is gradually becoming the standard for the supply interface of electronic devices with an external plug-in power supply unit. Due to the improved performance of the USB-C interface, preferably, rechargeable batteries in use can also be charged.

[0013] In addition to the external voltage supply, the power grid operation interface via the USB-C interface can also have a built-in fixedly mounted power supply unit.

[0014] Furthermore, the present invention proposes that the construction site audio playback device has a charging interface for charging external devices. The charging interface is, for example, particularly used to charge a tablet computer, a smart phone or a mobile phone. Preferably, the charging interface can be used not only during power grid operation via the power grid operation interface, but also during battery operation via the battery interface. In particular, it is conceivable that charging via the charging interface is restricted or impossible depending on the charging state of the rechargeable battery and / or depending on the power requirements of the audio playback unit. Additionally, the charging interface can be constituted not only by a wired-connected charging interface but also by a wireless charging interface. For example, the charging interface can constitute an inductive charging surface, for example particularly according to the Qi standard. This can provide particularly advantageous high user comfort. Preferably, the construction site audio playback device is additionally used as a charger.

[0015] The present invention further proposes that the charging interface can be supplied with energy by the battery interface or the grid operation interface according to the operating state. Preferably, the charging interface can be used not only through the grid operation interface during grid operation but also through the battery interface during battery operation. In particular, it can be envisaged here that charging via the charging interface is restricted or impossible depending on the charging state of the replaceable battery and / or depending on the power requirements of the audio playback unit. In particular, external devices can also be charged via the replaceable battery. Thus, particularly advantageous higher comfort can be provided. Preferably, the construction site audio playback device is additionally used as a charger and / or a mobile power source.

[0016] The present invention further proposes that the charging interface is constituted by a USB interface, in particular by a USB-C interface. The USB interface is in particular configured as a USB-C interface, but it can also be envisaged, for example, to be configured as a USB-A interface. The preferred charging interface is arranged to be directly connected to an external device, such as in particular a smartphone or a tablet, via a USB-C cable. In particular, it can be envisaged that the USB-C interface can be used not only for energy output but also for data transfer. In particular, it can be envisaged here that audio data can be transmitted to the construction site audio playback device via the USB-C interface and / or the firmware of the construction site audio playback device can be upgraded. Thus, a standardized charging interface can be provided in particular.

[0017] Alternatively or additionally, it can also be envisaged that the charging interface has a USB-A interface or other USB ports for charging external devices, as well as other plug connections via which electrical energy can be provided.

[0018] Furthermore, the present invention provides that the control or regulation unit is configured to control the energy flow according to the operating state, wherein supplying energy to the audio playback unit takes precedence over charging the replaceable battery. The construction site audio playback device can be supplied with electrical energy via a mains operation interface, in particular by means of an external plug-in power unit. Alternatively, electrical energy can be provided via the replaceable battery, in particular via different voltage levels. If both voltage sources are available, the power supply interface is preferentially used. This means that in this case the replaceable battery is not discharged. Furthermore, the present invention provides that when the mains operation interface is connected, the audio playback unit is configured to be supplied with energy by the mains operation interface. The connected mains interface should be understood in particular in the context that the mains interface is connected to the external mains via an external plug-in power unit. The replaceable battery is discharged only when no plug-in power unit is connected to the mains interface. In special cases, this priority can also be changed and the replaceable battery can be used as a buffer battery, for example. The functionality of the construction site audio playback device based on electrical energy should be achieved with the available energy. The audio playback unit should operate with the first, highest priority. The second priority should in particular be to charge a third-party device via the charging interface. The third priority should in particular be to charge the replaceable battery via the battery interface. However, other priorities are also conceivable. When there is a sufficient energy supply, all three functions of the construction site audio playback device should be available to the user. When, for example, very loud music is played via the audio playback unit, an energy shortage may occur. In this case, the generation of sound energy should not be restricted by the audio playback unit. Instead, the functions are switched off according to their priority. This can be explained according to different levels of the volume of the radio device. It must be distinguished here via which energy source the radio device is supplied.

[0019] The priority depends in particular on the system configuration. Alternatively, for example, the focus can be placed on charging the replaceable battery or on charging via the charging interface. It is also conceivable that the priority can be set by the user. When the charging priority of the replaceable battery is higher than the priority of the audio playback unit, then at least part of the volume must be reduced, for example. Similarly, the construction site audio playback device can be switched to the intelligent mode automatically or under user control. In this case, the battery pack with the inserted power unit can also be partially discharged to meet the peak power. This is precisely an advantage in converting electrical energy into sound energy, since short-term current peaks must be intercepted by the power unit here, for example during bass playback. Thanks to this intelligent module, it is possible to reduce the size of the power unit with the same sound power or to continue charging external devices via the construction site audio playback device. If a lower sound power is required, the mains operation interface can again supply electrical energy for charging the replaceable battery.

[0020] In addition, the present invention is based on a method for operating a construction site audio playback device. The present invention proposes that in at least one operating charging step, the grid operating interface supplies energy to the audio playback unit and simultaneously charges the replaceable battery accommodated in the battery interface via the grid operating interface. The construction site audio playback device will be supplied with electrical energy via the grid operating interface, especially by means of an external plug-in power supply unit, in the operating charging step or in the grid operating step. Alternatively, in the battery operating step, electrical energy can be provided via the replaceable battery, especially via different voltage levels. If two voltage sources are available, the grid interface is preferably used especially. This means that in this case, the replaceable battery will not discharge. The replaceable battery will only discharge when no plug-in power supply unit is connected to the grid interface. In addition to the supply of the audio playback unit, other electrical energy is available in the grid operating step and if the replaceable battery is connected, the construction site audio playback device switches to the operating charging step, in which the replaceable battery is additionally charged. Therefore, it is possible to achieve an advantageously variable operation especially. The construction site audio playback device can operate especially advantageously with only one replaceable battery and without an additional charger because the construction site audio playback device itself can also be used as a charger. In addition, there is no need to carry an additional charger. In an advantageous embodiment, the operation of the construction site audio playback device and the charging of the replaceable battery are carried out simultaneously in addition. Therefore, a particularly advantageous higher level of comfort can be provided.

[0021] In addition, the present invention proposes that in at least one battery operating step, the audio playback unit operates via the replaceable battery accommodated in the battery interface. Preferably, according to the operating state, the charging interface is supplied with energy by the battery interface or the grid operating interface equally. Preferably, the charging interface can be used not only by the grid operating interface during grid operation but also by the battery interface during battery operation. In particular, it can be considered here that the charging via the charging interface is restricted or impossible according to the charging state of the replaceable battery and / or according to the power requirement of the audio playback unit. If, in addition to the supply of the audio playback unit, other electrical energy is available in the battery step and an external device is connected at the charging interface, the construction site audio playback device switches to another operating charging step, in which the external device is additionally charged via the charging interface. Therefore, a particularly advantageous higher level of comfort can be provided. Preferably, the construction site audio playback device can be additionally used as a charger and / or a mobile power supply thereby. The battery operation can be further realized especially.

[0022] The construction site audio playback device and method according to the present invention should not be limited to the applications and embodiments described above. In particular, the construction site audio playback device according to the present invention and the method for satisfying the working principles described herein may have a number different from the number of individual elements, components, and units and method steps described herein. In addition, the numerical ranges and the numerical values within the so-called boundaries mentioned in this disclosure document should also be regarded as publicly disclosed and arbitrarily usable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other advantages result from the following description of the drawings. Embodiments of the present invention are shown in the drawings. Many combinations of features are included in the drawings, the description, and the claims. Those skilled in the art will also consider the features separately and purposefully and summarize them into other meaningful combinations.

[0024] SHOWS:

[0025] Figure 1 : A system having a construction site audio playback device according to the present invention in a schematic diagram, the construction site audio playback device having an audio playback unit, a battery interface, and a grid operation interface, and having a replaceable battery,

[0026] Figure 2 : A schematic energy flow diagram of a construction site audio playback device according to the present invention and

[0027] Figure 3 : A schematic flowchart of a method for operating a construction site audio playback device according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Figure 1 A system having a construction site audio playback device 10 and a replaceable battery 18 is shown. The construction site audio playback device 10 consists of a construction site radio device. However, it is also conceivable that there are different configurations of other construction site audio playback devices 10 that are meaningful to those skilled in the art.

[0029] The construction site audio playback device 10 has a housing 30. The housing 30 has a basic shape of a basic cuboid. The housing 30 is composed of a plastic housing. The construction site audio playback device 10 further has an audio playback unit 12. The audio playback unit 12 includes an electronic unit 32 having a radio receiver, an audio processor, and an amplifier. In addition, the audio playback unit 12 includes, for example, two speakers 34, 36. The audio playback unit 12 may further have other speakers. The speakers 34, 36 are integrated in the housing 30. The area of the housing 30 that houses the speakers 34, 36 is formed as a circle deviating from the basic cuboid shape. In addition, the construction site audio playback device 10 has a control or adjustment unit 14. The control or adjustment unit 14 is arranged in the housing 30. The control or adjustment unit 14 is provided for power management. In addition, the construction site audio playback device 10 has a battery interface 16. The battery interface 16 is provided for detachably receiving a replaceable battery 18 without tools. The battery interface 16 is particularly suitable for receiving different replaceable batteries 18, especially replaceable batteries 18 with different voltage levels. The illustrated replaceable battery 18 is composed of, for example, a 18V hand tool battery. The battery interface 16 is provided for supplying energy to the audio playback unit 12 in at least one operating state. The battery interface 16 is arranged on the rear side of the housing 30. The construction site audio playback device 10 further includes a mains operation interface 20, which is provided for connection to an external power supply. The mains operation interface 20 is provided for supplying energy to the audio playback unit 12 in at least one operating state. The mains operation interface 20 is composed of a USB-C interface. The mains operation interface 20 is arranged on one side of the housing 30. The mains operation interface 20 is provided for connecting via a USB-C cable 38 and a plug-in power unit and switching on via the plug-in power unit on an external power grid, such as especially a domestic power grid or the like.

[0030] In addition, the construction site audio playback device 10 has two charging interfaces 22 for charging external devices 24. The charging interfaces 22 are each composed of a USB-C interface. The charging interfaces 22 are arranged, for example, on the front of the housing 30. The charging interfaces 22 are used, for example, to charge a tablet computer, a smartphone, or a mobile phone.

[0031] The construction site audio playback device 10 further has two handle devices 40, an operation unit 42, a display screen 44, and an antenna 46. The handle devices 40 are arranged on both sides of the housing 30. The operation unit 42 and the display screen 44 are arranged on the front of the housing 30. The antenna 46 is arranged on the top of the housing 30.

[0032] The construction site audio playback device 10 can operate in different ways. The construction site audio playback device 10 has mains operation and battery operation.

[0033] The grid operation interface 20 is configured in at least one operating state to charge the replaceable battery 18 accommodated in the battery interface 16. The grid operation interface 20 can not only charge the replaceable battery 18 accommodated in the battery interface 16 or also supply electrical energy to, for example, the audio playback unit 12 and charge the replaceable battery 18 accommodated in the battery interface 16. The grid operation interface 20 is configured in at least one operating state to supply electrical energy to the audio playback unit 12 and the replaceable battery 18 accommodated in the battery interface 16 simultaneously. The control or regulation unit 14 is configured to supply energy from the grid operation interface 20 to the audio playback unit 12 and the battery interface 16 during grid operation. Preferably, the control or regulation unit 14 is configured to supply the required energy to the audio playback unit 12 via the grid operation interface 20, and the excess energy of the grid operation interface 20 is delivered to the battery interface 16. When the grid operation interface 20 is switched on, the audio playback unit 12 is configured to be supplied with energy by the grid operation interface 20.

[0034] The charging interface 22 is supplied with energy by the battery interface 16 or the grid operation interface 20 depending on the operating state. The charging interface 22 can be used not only by the grid operation interface 20 during grid operation but also by the battery interface 16 during battery operation.

[0035] The control or regulation unit 14 is configured to control the energy flow depending on the operating state, wherein the energy supply to the audio playback unit 12 has priority over the charging of the replaceable battery 18.

[0036] The construction site audio playback device 10 can be supplied with electrical energy via the grid operation interface 20 by means of an external plug-in power supply unit. Alternatively, electrical energy can be provided via the replaceable battery 18. If both voltage sources are available, the grid operation interface 20 is preferably used. This means that in this case, the replaceable battery 18 will not discharge. When the grid operation interface 20 is connected, the audio playback unit 12 is set to be supplied with energy by the grid operation interface 20. The replaceable battery 18 only discharges when no plug-in power supply unit is connected to the grid operation interface 20. In special cases, this priority can also be changed and the replaceable battery 18 is used as a buffer battery, for example. With the available energy, the functions of the construction site audio playback device 10 based on electrical energy should be realized. Here, the audio playback unit 12 operates with the first, highest priority. The second priority should be to charge the third-party device 24 via the charging interface 22. The third priority should be to charge the replaceable battery 18 via the replaceable battery 16. However, other priorities are also conceivable. When the energy supply is sufficient, all three functions of the construction site audio playback device 10 should be available to the user. When, for example, very loud music is played via the audio playback unit 12, a shortage of energy may occur. In this case, the sound energy generated by the audio playback unit 12 should not be limited. Instead, functions are switched off according to their priority. This can be illustrated according to different levels regarding the volume of the radio device. Here, it must be distinguished via which energy source the construction site audio playback device 10 is supplied.

[0037] During grid operation, when the grid operation interface 20 is connected to the external grid, in particular, four levels of the audio playback unit 12 are available. At level 0, in this level, the audio playback unit 12 operates at an appropriate volume and all functions are available, so that not only can the external device 24 be charged via the charging interface 22, but also the replaceable battery 18 can be charged via the battery interface 16. At level 1, in this level, the audio playback unit 12 operates at a higher volume, and charging the replaceable battery 18 via the battery interface 16 is cut off. At level 2, in this level, the audio playback unit 12 operates at a very high volume, and moreover, charging the external device 24 via the charging interface 22 is cut off. At level 3, in this level, the audio playback unit 12 operates at an extremely high volume, and the replaceable battery 18 arranged at the battery interface 16 is used as a buffer energy source in the case of extremely high load peaks exceeding the power capacity of the plug-in power supply unit. In particular, level 3 is only available when the replaceable battery 18 is connected.

[0038] When the storage battery is in operation and energy is supplied via the replaceable storage battery 18, three levels of the audio playback unit 12 are particularly available. At level 0, in this level, the audio playback unit 12 operates at an appropriate volume, and all functions except charging the replaceable storage battery 18 are available, so that the external device 24 can also be charged via the charging interface 22. At level 1, in this level, the audio playback unit 12 operates at a higher volume, and all functions except charging the replaceable storage battery 18 are available, so that the external device 24 can also be charged via the charging interface 22. At level 2, in this level, the audio playback unit 12 operates at a very high volume, and moreover, charging the external device 24 via the charging interface 22 is cut off.

[0039] Figure 3 A schematic flow chart showing a method of operating a construction site audio playback device 10 is shown.

[0040] The method includes a startup step (Inbetriebnahmeschritt) 48. If the construction site audio playback device 10 is activated, then in the startup step 48, it is checked by the control or regulation unit whether the construction site audio playback device 10 is supplied with electrical energy via the grid operation interface 20 or via the storage battery interface 16.

[0041] If the construction site audio playback device 10 is supplied with electrical energy via the grid operation interface 20, then a grid operation step 50 is carried out, in which the audio playback unit 12 is supplied with energy via the grid operation interface 20. Depending on a level of the audio playback unit 12 and depending on whether the replaceable storage battery 18 is located in the storage battery interface 16, the control or regulation unit 14 is switched to the operation charging step 26. In the operation charging step 26, the grid operation interface 20 supplies energy to the audio playback unit 12, yet at the same time charges the replaceable storage battery 18 accommodated in the storage battery interface 16 via the grid operation interface 20. In the operation charging step 26, moreover, the external device 24 connected at the charging interface 22 can be charged.

[0042] If the construction site audio playback device 10 is supplied with electrical energy via the battery interface 16 and the replaceable battery 18, the battery operation step 28 is performed, in which the audio playback unit 12 is supplied with energy via the battery interface 16 and the replaceable battery 18. In the battery operation step 28, the audio playback unit 12 operates via the replaceable battery 18 accommodated at the battery interface 16. Depending on the level of the audio playback unit 12 and depending on whether the external device 24 is located at the charging interface 22, the switching control or regulation unit 14 is switched to the battery operation charging step 52. In the battery operation charging step 52, the battery interface 16 and the replaceable battery 18 supply energy to the audio playback unit 12, yet at the same time charge the external device 24 connected at the charging interface 22.

Claims

1. Construction site audio playback device, especially a construction site radio device, said construction site audio playback device having an audio playback unit (12), having a control or regulation unit (14), having a battery interface (16) for tool-free, detachable accommodation of a replaceable battery (18), said battery interface being set up in at least one operating state for supplying energy to the audio playback unit (12), and having at least one mains operation interface (20), said mains operation interface being set up for connection to an external mains network, and said mains operation interface being set up in at least one operating state for supplying energy to the audio playback unit (12), characterized in that The grid operation interface (20) is configured in at least one operating state to charge a replaceable battery (18) accommodated in the battery interface (16).

2. The construction site audio playback device according to claim 1, wherein The grid operation interface (20) is configured in at least one operating state to supply energy to the audio playback unit (12) and, in particular, simultaneously to the replaceable battery (18) accommodated in the battery interface (16).

3. The construction site audio playback device according to claim 1 or 2, characterized in that, The grid operation interface (20) consists of a USB-C interface.

4. The construction site audio playback device according to any one of the preceding claims, characterized in that A charging interface (22) for charging an external device (24).

5. The construction site audio playback device according to claim 4, wherein The charging interface (22) can be supplied with energy by the battery interface (16) or the grid operation interface (20) depending on the operating state.

6. The construction site audio playback device according to at least claim 4, characterized in that The charging interface (22) consists of a USB interface, in particular a USB-C interface.

7. The construction site audio playback device according to any one of the preceding claims, characterized in that, The control or regulation unit (14) is configured to control the energy flow depending on the operating state, wherein the energy supply to the audio playback unit (12) has priority over charging the replaceable battery (18).

8. The construction site audio playback device according to any one of the preceding claims, characterized in that, When the grid operation interface (20) is switched on, the audio playback unit (12) is configured to be supplied with energy by the grid operation interface (20).

9. A method for operating a construction site audio playback device (10) according to any one of the preceding claims, characterized in that, In at least one operating charging step (26), the grid operation interface (20) supplies energy to the audio playback unit (12) and simultaneously charges the replaceable battery (18) accommodated in the battery interface (16) via the grid operation interface (20).

10. The method according to claim 9, wherein In at least one battery operating step (28), the audio playback unit (12) operates via the replaceable battery (18) accommodated in the battery interface (16).

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