Charging bin power supply circuit, charging bin and electronic equipment

Abstract

The utility model relates to the technical field of electronic equipment, and provides a charging bin power supply circuit, a charging bin and electronic equipment. The charging bin power supply circuit comprises a battery, an external contact, an OTG interface, a switching circuit and a main control chip, the battery, the external contact and the OTG interface are electrically connected with the switching circuit. The external contact, the OTG interface and the switching circuit are in communication connection with the main control chip. And the main control chip is used for determining a power supply strategy according to the states of the external contact and the OTG interface, and controlling the switching circuit according to the power supply strategy, so that the switching circuit is connected with any two or three of the battery, the external contact and the OTG interface. According to the invention, multi-path discharging of the charging bin to the outside is realized, the function and the use scene of the charging bin are expanded, the charging bin can be compatible with other universal equipment with a standard interface and can be used for charging by using the charging bin, and the integration level of hardware is improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to a charging case power supply circuit, a charging case, and an electronic device. Background Technology

[0002] For smart wearable devices with built-in rechargeable batteries, convenient charging is a strong requirement. Therefore, many products are equipped with portable power banks to facilitate charging of these devices. Examples include wireless Bluetooth headphones, hearing aids, wireless microphones, and smartwatches. These products typically consist of a separate charging case and a device inside the case. The charging case acts as a portable power source, used to charge the device stored inside.

[0003] For smaller devices that fit inside the charging case, pressure-contact charging is typically used, where the device contacts the charging case. The charging case has a standard interface for connecting to an external power source. However, the charging case is limited in function and cannot discharge externally, meaning it cannot charge other devices with standard interfaces. Utility Model Content

[0004] This invention provides a charging case power supply circuit, a charging case, and an electronic device to solve the problem that the charging cases of existing electronic devices have limited functionality and cannot charge other devices with standard interfaces.

[0005] This utility model provides a charging case power supply circuit, including: a battery, external contacts, an OTG interface, a switching circuit, and a main control chip;

[0006] The battery, the external contact, and the OTG interface are electrically connected to the switching circuit, and the external contact, the OTG interface, and the switching circuit are communicatively connected to the main control chip. The main control chip is used to determine a power supply strategy based on the status of the external contact and the OTG interface, and to control the switching circuit according to the power supply strategy, so that the switching circuit connects any two or three of the battery, the external contact, and the OTG interface.

[0007] According to the present invention, a charging compartment power supply circuit further includes: a charge and discharge management chip, wherein the charge and discharge management chip is electrically connected between the battery and the switching circuit, and the charge and discharge management chip is communicatively connected to the main control chip;

[0008] The main control chip is also used to send the relevant information of the power supply strategy to the charge and discharge management chip, and the charge and discharge management chip is used to connect the charging path or the discharging path of the battery according to the relevant information of the power supply strategy.

[0009] According to the present invention, a charging compartment power supply circuit further includes: a fuel gauge chip, which is electrically connected between the battery and the charge / discharge management chip, and is communicatively connected to the main control chip; the main control chip is also used to adjust the power supply strategy according to the power level monitored by the fuel gauge chip.

[0010] According to the present invention, a charging compartment power supply circuit is provided, wherein the switching circuit includes: a first switch, a second switch and a third switch;

[0011] The battery is connected to one end of the third switch, and the other end of the third switch leads out a first branch path and a second branch path. The external contact is located at the end of the first branch path and is connected to the third switch through the first switch. The OTG interface is located at the end of the second branch path and is connected to the third switch through the second switch. The first switch, the second switch and the third switch are electrically connected to the main control chip.

[0012] According to the present invention, a charging compartment power supply circuit further includes: an overcurrent protection chip; the overcurrent protection chip is electrically connected between the third switch and the battery, and the overcurrent protection chip is electrically connected to the main control chip.

[0013] According to the present invention, a charging case power supply circuit further includes an overvoltage protection chip, which is electrically connected between the second switch and the OTG interface, and is electrically connected to the main control chip.

[0014] According to the charging case power supply circuit provided by this utility model, when the external contact is connected to the charging device and the OTG interface is connected to the external device, the main control chip is used to: control the closing of the first switch, the second switch and the third switch;

[0015] When an external device is connected to the OTG interface and no inbound device is connected to the external contact, the main control chip is used to: control the second switch and the third switch to close, and the first switch to open;

[0016] When the external contact is connected to the inbound device and the OTG interface is not connected to an external device, the main control chip is used to: control the first switch and the third switch to close, and the second switch to open.

[0017] According to the charging case power supply circuit provided by this utility model, when an inlet device is connected to the external contact and an external device is connected to the OTG interface, the main control chip is further configured to: identify the role of the external device; when the external device is determined to be a power source, control the OTG interface to supply power to the external contact first according to a preset priority order; when the external device is determined to be a load, control the battery to supply power to the external contact first according to the priority order.

[0018] This utility model also provides a charging case, including: a shell and any of the above-mentioned charging case power supply circuits, wherein the charging case power supply circuit is disposed inside the shell.

[0019] This utility model also provides an electronic device, including: a storage device and any of the above-mentioned charging compartments, wherein the charging compartment forms a receiving space for accommodating the storage device, and the external contact is disposed within the receiving space.

[0020] The charging case power supply circuit, charging case, and electronic device provided by this utility model, by setting up an OTG interface and a switching circuit, electrically connect the battery, external contacts, and OTG interface to the switching circuit respectively. The main control chip controls the switching circuit according to the status of the external contacts and OTG interface, so that the switching circuit connects any two or three of the battery, external contacts, and OTG interface, realizing multi-path discharge from the charging case to the outside, expanding the function and usage scenarios of the charging case, making it compatible with other general-purpose devices with standard interfaces to charge using the charging case, and improving the hardware integration. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a block diagram of the power supply circuit structure for the charging compartment provided by this utility model.

[0023] Figure label:

[0024] 1. Battery; 2. External contacts; 3. OTG interface; 4. Switching circuit; 41. First switch; 42. Second switch; 43. Third switch; 5. Main control chip; 6. Charge / discharge management chip; 7. Fuel meter chip; 8. Overcurrent protection chip; 9. Overvoltage protection chip. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "first," "second," and "third" are numbered to clearly describe the product components and do not represent any substantial difference.

[0027] like Figure 1 As shown, the charging case power supply circuit provided in this embodiment includes a battery 1, external contacts 2, an OTG interface 3, a switching circuit 4, and a main control chip 5. The battery 1, external contacts 2, and OTG interface 3 are electrically connected to the switching circuit 4. The external contacts 2, OTG interface 3, and switching circuit 4 are communicatively connected to the main control chip 5. The main control chip 5 determines a power supply strategy based on the status of the external contacts 2 and OTG interface 3, and controls the switching circuit 4 according to the power supply strategy, so that the switching circuit 4 connects any two or three of the battery 1, external contacts 2, and OTG interface 3.

[0028] Among them, OTG interface 3 is a standard interface that supports OTG (On-The-Go) function, such as a USB Type-C interface. Battery 1, external contact 2, OTG interface 3, switching circuit 4, and main control chip 5 are all located inside the charging compartment. The main control chip 5 serves as the control center of the entire charging compartment.

[0029] OTG interface 3 is used to connect an external device, which can be an external power source or a general-purpose device with a standard interface. When the external device is a power source, it can charge battery 1. When the external device is a general-purpose device with a standard interface, OTG interface 3 can be used as a charging interface, allowing the general-purpose device to charge battery 1 through OTG interface 3; alternatively, OTG interface 3 can be used as a discharging interface, allowing battery 1 to discharge to the general-purpose device through OTG interface 3.

[0030] The state of external contact 2 includes whether it is connected to the receiving device or not. The state of OTG interface 3 includes whether it is connected to an external device or not, and when connected to an external device, whether OTG interface 3 is used as a charging interface or a discharging interface.

[0031] The main control chip 5 determines the power supply strategy based on the status of the external contact 2 and the OTG interface 3, and then controls the switching circuit 4 based on this power supply strategy to enable switching between various power supply scenarios for any two or three of the battery 1, external contact 2, and OTG interface 3. These power supply scenarios include:

[0032] Scenario 1: OTG interface 3 only supplies power to external contact 2.

[0033] Scenario 2: OTG interface 3 supplies power to battery 1 and external contact 2.

[0034] Scenario 3: OTG interface 3 and battery simultaneously supply power to external contact 2.

[0035] Scenario 4: OTG interface 3 only supplies power to battery 1.

[0036] Scenario 5: Battery 1 supplies power to OTG interface 3 and external contact 2.

[0037] Scenario 6: Battery 1 only supplies power to OTG interface 3.

[0038] Scenario 7: Battery 1 supplies power only to external contact 2.

[0039] The main control chip 5 can adjust the power supply strategy based on the real-time status of the external contact 2 and the OTG interface 3. The main control chip 5 can also adjust the power supply strategy based on the real-time status of the battery 1, including its voltage, discharge current, and discharge capacity.

[0040] The charging case power supply circuit provided in this embodiment of the utility model, by setting up an OTG interface 3 and a switching circuit 4, electrically connects the battery 1, external contact 2 and OTG interface 3 to the switching circuit 4 respectively. The main control chip 5 controls the switching circuit 4 according to the state of external contact 2 and OTG interface 3, so that the switching circuit 4 connects any two or three of the battery 1, external contact 2 and OTG interface 3, realizing multi-path discharge of the charging case to the outside, expanding the function and usage scenarios of the charging case, making it compatible with other general-purpose devices with standard interfaces to charge using the charging case, and improving the hardware integration, which is conducive to more efficient release of battery energy.

[0041] See Figure 1The charging compartment power supply circuit provided in this embodiment of the present invention also includes a charge / discharge management chip 6. The charge / discharge management chip 6 is electrically connected between the battery 1 and the switching circuit 4, and is communicatively connected to the main control chip 5. The main control chip 5 is also used to send relevant information about the power supply strategy to the charge / discharge management chip 6. The charge / discharge management chip 6 is used to connect the charging or discharging path of the battery 1 according to the relevant information about the power supply strategy. In this embodiment of the present invention, the main control chip 5 can control the working mode of the charge / discharge management chip 6 through demand identification, flexibly allocating power between charging and discharging.

[0042] The charge / discharge management chip 6 is primarily responsible for managing the charging and discharging process of battery 1, including regulating charging current and voltage, monitoring charging status, and providing overcharge and over-discharge protection, ensuring the safety and stability of battery 1 during the charging and discharging process. The discharge path of the charge / discharge management chip 6 includes a boost circuit. During the discharge process, the voltage of battery 1 is boosted by the boost circuit and output to the loading device or external equipment.

[0043] When there is no external device connected to the OTG interface 3, but the external contact 2 is connected to the charging device, the main control chip 5 determines that power needs to be supplied to the external contact 2 through the battery 1. The main control chip 5 configures the charging information of the charging compartment and sends it to the charge and discharge management chip 6, so that the charge and discharge management chip 6 closes the charging path.

[0044] When the OTG interface 3 is connected to an external device, the main control chip 5 first determines whether the external device is a power source or a load (i.e., a device that needs charging). If the external device is determined to be a power source, meaning it needs to supply power to the battery 1 through the OTG interface 3, the main control chip 5 configures the charging information for the charging case and sends it to the charge / discharge management chip 6, causing the charge / discharge management chip 6 to close the charging path. If the external device is determined to be a load, meaning it needs to supply power to the OTG interface 3 through the battery 1, the main control chip 5 configures the discharging information for the charging case and sends it to the charge / discharge management chip 6, causing the charge / discharge management chip 6 to close the discharging path.

[0045] See Figure 1 The charging compartment power supply circuit provided in this embodiment of the present invention also includes a fuel gauge chip 7. The fuel gauge chip 7 is electrically connected between the battery 1 and the charge / discharge management chip 6. The fuel gauge chip 7 is communicatively connected to the main control chip 5. The main control chip 5 is also used to adjust the power supply strategy according to the power level monitored by the fuel gauge chip 7.

[0046] The fuel gauge chip 7 monitors the status information of battery 1, such as battery voltage, discharge current, and discharge capacity, and feeds this information back to the main control chip 5. The main control chip 5 adjusts the power supply strategy based on the status information of battery 1. For example, when both the charging device and an external device are connected to the charging compartment simultaneously, if the main control chip 5 determines that the power supply capacity of battery 1 is greater than the demand of the charging device, it will control the switching circuit 4 to connect battery 1 and OTG interface 3, enabling battery 1 to supply power to the external device.

[0047] It should be noted that the fuel gauge chip 7 can be integrated into the charge / discharge management chip 6, and the charge / discharge management chip 6 can be integrated into the main control chip 5.

[0048] See Figure 1 In this embodiment of the invention, the switching circuit 4 includes a first switch 41, a second switch 42, and a third switch 43. Battery 1 is connected to one end of the third switch 43, and the other end of the third switch 43 leads to a first branch path and a second branch path. External contact 2 is located at the end of the first branch path and connected to the third switch 43 via the first switch 41. OTG interface 3 is located at the end of the second branch path and connected to the third switch 43 via the second switch 42. The first switch 41, the second switch 42, and the third switch 43 are electrically connected to the main control chip 5. The first switch 41, the second switch 42, and the third switch 43 can be on / off switches such as relays or contactors.

[0049] This embodiment achieves an integrated design of the charging and discharging paths of the charging compartment by setting up a switching circuit 4 formed by the first switch 41, the second switch 42, and the third switch 43. This improves the integration of the circuit hardware structure and facilitates more efficient release of battery 1's energy. By flexibly controlling the opening and closing of the three sets of switches, user needs are better met, and the user experience is enhanced.

[0050] The charging case power supply circuit provided in this embodiment of the invention also includes an overcurrent protection chip 8. The overcurrent protection chip 8 is electrically connected between the third switch 43 and the battery 1, and is also electrically connected to the main control chip 5. Specifically, the overcurrent protection chip 8 is electrically connected between the third switch 43 and the charge / discharge management chip 6. The overcurrent protection chip 8 is used to monitor the current in the circuit and provide feedback to the main control chip 5. The main control chip 5 has a current threshold; when the monitored current exceeds the current threshold, it controls the overcurrent protection chip 8 to cut off the circuit, thereby ensuring that the external discharge current of the charging case is within a reasonable range and preventing excessive discharge current from causing functional abnormalities.

[0051] The charging case power supply circuit provided in this embodiment of the invention also includes an overvoltage protection chip 9. The overvoltage protection chip 9 is electrically connected between the second switch 42 and the OTG interface 3, and is electrically connected to the main control chip 5. The overvoltage protection chip 9 is used to monitor the voltage in the circuit and feed it back to the main control chip 5. The main control chip 5 has a voltage threshold. When the monitored voltage exceeds the voltage threshold, it controls the overvoltage protection chip 9 to cut off the circuit, thereby protecting the system circuit from the effects of excessive voltage fluctuations. Furthermore, the overvoltage protection chip 9 can also be used in charge / discharge priority control. The main control chip 5 can control the overvoltage protection chip 9 to cut off the circuit, allowing the battery 1 to prioritize powering the external contact 2.

[0052] In this embodiment of the invention, when the external contact 2 is connected to an inbound device and the OTG interface 3 is connected to an external device, the main control chip 5 is used to control the closing of the first switch 41, the second switch 42, and the third switch 43. This configuration can be used to implement scenarios one, two, three, and five described above.

[0053] When an external device is connected to OTG interface 3 and no inbound device is connected to external contact 2, the main control chip 5 is used to: control the second switch 42 and the third switch 43 to close, and the first switch 41 to open. This can be used to implement scenarios four and six above.

[0054] When the external contact 2 is connected to the receiving device and the OTG interface 3 is not connected to an external device, the main control chip 5 is used to: control the first switch 41 and the third switch 43 to close, and the second switch 42 to open. This can be used to implement the above scenario seven.

[0055] In the above embodiments, when the external contact 2 is connected to the inbound device and the OTG interface 3 is connected to the external device, the main control chip 5 is also used to: identify the role of the external device; when the external device is determined to be a power source, control the OTG interface 3 to supply power to the external contact 2 first according to the preset priority order; when the external device is determined to be a load, control the battery 1 to supply power to the external contact 2 first according to the priority order.

[0056] The main control chip 5 can identify the role of the external device through the OTG interface 3, determining whether the external device is a power source or a load. In scenarios two, three, and five, the first switch 41, the second switch 42, and the third switch 43 remain closed, and the main control chip 5 performs charging and discharging control according to a preset priority order. When the external device is a power source, or when the external device is a load,

[0057] When the external device is identified as the load, the main control chip 5 configures the current of the external contact 2 and the OTG interface 3 according to priority to ensure the charging needs of the device in the storage compartment are met first. When the power supply capacity of battery 1 exceeds the needs of the device in the storage compartment, the remaining power is released to the OTG interface 3 to charge the external device.

[0058] When an external device is identified as the power source, the main control chip 5 controls the charge / discharge management chip 6 according to priority, ensuring the charging needs of the device being stored are met first. Specifically, when the main control chip 5 determines that both the device being stored and battery 1 require charging, it prioritizes charging the device being stored. When the main control chip 5 determines that the power supply capacity of the external device exceeds the needs of the device being stored, it releases the remaining power to battery 1. When the main control chip 5 determines that the device being stored needs charging while battery 1 does not, it prioritizes charging the device being stored via the external device. Furthermore, when the main control chip 5 determines that the power supply capacity of the external device is insufficient to meet the needs of the device being stored, it controls battery 1 to supplement the charging of the device being stored.

[0059] In this embodiment of the invention, the information path of the charging case power supply circuit is as follows: OTG interface 3 / external contact 2 / fuel gauge chip 7 → main control chip 5 → charge / discharge management chip 6 / switching circuit 4 / overcurrent protection chip 8 / overvoltage protection chip 9. That is, the main control chip 5 controls the charge / discharge management chip 6 and the switching circuit 4 based on the status information of the OTG interface 3, external contact 2, and battery 1 to implement the corresponding power supply strategy, while simultaneously controlling the overcurrent protection chip 8 and the overvoltage protection chip 9 to protect the circuit.

[0060] The energy transfer path in the above scenario 1 includes: OTG interface 3 → overvoltage protection chip 9 → second switch 42 → first switch 41 → external contact 2.

[0061] The energy transfer path in the above scenario 2 includes: OTG interface 3 → overvoltage protection chip 9 → second switch 42 → third switch 43 → overcurrent protection chip 8 → charge / discharge management chip 6 → fuel gauge chip 7 → battery 1; and OTG interface 3 → overvoltage protection chip 9 → second switch 42 → first switch 41 → external contact 2.

[0062] The energy transfer path in the above scenario three includes: OTG interface 3 → overvoltage protection chip 9 → second switch 42 → first switch 41 → external contact 2; and battery 1 → fuel gauge chip 7 → charge / discharge management chip 6 → overcurrent protection chip 8 → third switch 43 → first switch 41 → external contact 2.

[0063] The energy transfer path in Scenario 4 above includes: OTG interface 3 → overvoltage protection chip 9 → second switch 42 → third switch 43 → overcurrent protection chip 8 → charge / discharge management chip 6 → fuel gauge chip 7 → battery 1.

[0064] The energy transfer path in the above scenario five includes: battery 1 → fuel gauge chip 7 → charge / discharge management chip 6 → overcurrent protection chip 8 → third switch 43 → second switch 42 → overvoltage protection chip 9 → OTG interface 3; and battery 1 → fuel gauge chip 7 → charge / discharge management chip 6 → overcurrent protection chip 8 → third switch 43 → first switch 41 → external contact 2.

[0065] The energy transfer path in Scenario 6 above includes: Battery 1 → Fuel meter chip 7 → Charge / discharge management chip 6 → Overcurrent protection chip 8 → Third switch 43 → Second switch 42 → Overvoltage protection chip 9 → OTG interface 3.

[0066] The energy transfer path in Scenario 7 above includes: battery 1 → fuel gauge chip 7 → charge / discharge management chip 6 → overcurrent protection chip 8 → third switch 43 → first switch 41 → external contact 2.

[0067] This utility model embodiment also provides a charging case, which includes a shell and a charging case power supply circuit as described in any of the above embodiments, the power supply circuit being disposed within the shell. This charging case can be compatible with a wider range of terminal products for charging. It can discharge through customized external contacts 2 and charge and discharge through the OTG interface 3, expanding the device's usage scenarios and improving energy utilization.

[0068] This utility model embodiment also provides an electronic device, which includes a storage device and a charging case as described in the above embodiment. The charging case forms a receiving space for accommodating the storage device, and an external contact 2 is disposed within the receiving space. The storage device can be an earphone, hearing aid, microphone, or watch.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A power supply circuit for a charging case, characterized in that, include: Battery, external contacts, OTG interface, switching circuit and main control chip; The battery, the external contact, and the OTG interface are electrically connected to the switching circuit, and the external contact, the OTG interface, and the switching circuit are communicatively connected to the main control chip. The main control chip is used to determine a power supply strategy based on the status of the external contact and the OTG interface, and to control the switching circuit according to the power supply strategy, so that the switching circuit connects any two or three of the battery, the external contact, and the OTG interface.

2. The charging vault power supply circuit of claim 1, wherein, Also includes: A charge / discharge management chip is electrically connected between the battery and the switching circuit, and the charge / discharge management chip is communicatively connected to the main control chip. The main control chip is also used to send the relevant information of the power supply strategy to the charge and discharge management chip, and the charge and discharge management chip is used to connect the charging path or the discharging path of the battery according to the relevant information of the power supply strategy.

3. The charging vault power supply circuit of claim 2, wherein, Also includes: A fuel gauge chip is electrically connected between the battery and the charge / discharge management chip, and the fuel gauge chip is communicatively connected to the main control chip; the main control chip is also used to adjust the power supply strategy based on the power level monitored by the fuel gauge chip.

4. The charging vault power supply circuit of claim 1, wherein, The switching circuit includes: a first switch, a second switch, and a third switch; The battery is connected to one end of the third switch, and the other end of the third switch leads out a first branch path and a second branch path. The external contact is located at the end of the first branch path and is connected to the third switch through the first switch. The OTG interface is located at the end of the second branch path and is connected to the third switch through the second switch. The first switch, the second switch and the third switch are electrically connected to the main control chip.

5. The charging vault power supply circuit of claim 4, wherein, Also includes: An overcurrent protection chip is electrically connected between the third switch and the battery, and is also electrically connected to the main control chip.

6. The charging vault power supply circuit of claim 4, wherein, Also includes: An overvoltage protection chip is electrically connected between the second switch and the OTG interface, and is also electrically connected to the main control chip.

7. The charging vault power supply circuit of claim 4, wherein, When the external contact is connected to the inbound device and the OTG interface is connected to the external device, the main control chip is used to: control the closing of the first switch, the second switch and the third switch; When an external device is connected to the OTG interface and no inbound device is connected to the external contact, the main control chip is used to: control the second switch and the third switch to close, and the first switch to open; When the external contact is connected to the inbound device and the OTG interface is not connected to an external device, the main control chip is used to: control the first switch and the third switch to close, and the second switch to open.

8. The charging vault power supply circuit of claim 7, wherein, When the external contact is connected to an inbound device and the OTG interface is connected to an external device, the main control chip is also used to: identify the role of the external device; if the external device is determined to be a power source, control the OTG interface to supply power to the external contact first according to a preset priority order; if the external device is determined to be a load, control the battery to supply power to the external contact first according to the priority order.

9. A charging pod, characterized by, include: The housing and the charging compartment power supply circuit as described in any one of claims 1-8, wherein the charging compartment power supply circuit is disposed within the housing.

10. An electronic device, characterized in that, include: The device for receiving the device and the charging compartment as described in claim 9, wherein the charging compartment forms a receiving space for receiving the device for receiving the device, and the external contact is located within the receiving space.

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