A handheld cleaning device

Abstract

The application discloses a handheld cleaning device, comprising a handheld device, a cleaning machine body, an accessory and a detection circuit; wherein the handheld device comprises a first button; the cleaning machine body and the accessory are detachably connected with the handheld device; the detection circuit is arranged on the handheld cleaning device; the handheld device is further provided with a control module connected with the detection circuit, and the first button is electrically connected with the control module; the control module is further used for determining that the cleaning machine body is connected with the handheld device when the detection circuit outputs a wake-up signal and the first button is not triggered within a preset time, and controlling the handheld device to operate in a first mode; the control module is further used for determining that the accessory is connected with the handheld device when the detection circuit outputs the wake-up signal and the first button is triggered within the preset time, and controlling the handheld device to operate in a second mode. The handheld cleaning device in the application can have multiple cleaning modes, greatly improving the utilization rate of the cleaning device.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more specifically, to a handheld cleaning device. Background Technology

[0002] With societal development, the market for household floor scrubbers has expanded rapidly, forming a new industrial chain. However, in current technology, the main form of floor scrubbers is the integrated upright scrubber, which is relatively large and inconvenient for cleaning bed sheets, sofas, and corners. Users need to purchase additional vacuum cleaners for these areas. Therefore, it's clear that the utilization rate of existing handheld cleaning devices like floor scrubbers is low. To address this issue, current technology involves detaching the handheld device from the main unit, allowing it to connect not only to the main unit but also to other accessories for multi-scenario cleaning, thus expanding the utilization rate of handheld cleaning devices. However, this approach requires different operating modes for different cleaning scenarios. Summary of the Invention

[0003] The purpose of this application is to provide a handheld cleaning device that can combine multiple cleaning modes, greatly improving the utilization rate of the cleaning device.

[0004] The embodiments of this application are implemented as follows:

[0005] This application provides a handheld cleaning device, including a handheld unit, a cleaning machine body, accessories, and a detection circuit; wherein, the handheld unit includes a first button; the cleaning machine body and accessories are detachably connected to the handheld unit; the detection circuit is disposed on the handheld cleaning device; the handheld unit also includes a control module connected to the detection circuit, and the first button is electrically connected to the control module; the control module is further configured to determine that the device connected to the handheld unit is the cleaning machine body when a wake-up signal is detected from the detection circuit and the first button is not triggered within a preset time, and control the handheld unit to operate in a first mode; the control module is also configured to determine that the device connected to the handheld unit is an accessory when a wake-up signal is detected from the detection circuit and the first button is triggered within a preset time, and control the handheld unit to operate in a second mode.

[0006] In one embodiment, the detection circuit includes a first detection circuit disposed on the handheld device, and the handheld cleaning device further includes a second button; wherein the second button is disposed on the main body of the cleaning machine and is electrically connected to the first detection circuit; the first detection circuit is used to output a wake-up signal when the first button or the second button is triggered.

[0007] In an embodiment, the first detection circuit includes a first branch and a second branch; the first branch is connected with the control module; the second branch is connected with the control module, and a switch element is arranged in the second branch; the first button is connected with the first branch, and the second button is connected with the second branch; the first detection circuit is further configured to output the wake-up signal through the first branch when the first button is triggered; and the first detection circuit is further configured to turn on the switch element and output the wake-up signal through the second branch when the second button is triggered.

[0008] In an embodiment, the first branch includes a diode and a capacitor; the anode of the diode is connected with the control module, and the cathode of the diode is connected with the first button; one end of the capacitor is connected with the first button, and the other end of the capacitor is grounded.

[0009] In an embodiment, the switch element is a MOS tube; the drain of the MOS tube is connected with the control module, the gate of the MOS tube is connected with the second button, and the source of the MOS tube is grounded.

[0010] In an embodiment, the second branch further includes a voltage stabilizing diode; the cathode of the voltage stabilizing diode is connected with the gate of the MOS tube, and the anode of the voltage stabilizing diode is grounded.

[0011] In an embodiment, the detection circuit further includes a second detection circuit; the second detection circuit includes a first connection end and a second connection end; the first connection end is arranged on the handheld device, and the first connection end is connected with the control module; the second connection end is arranged on the cleaner main body and is configured to be connected with the first connection end; the first connection end is connected with a pull-up circuit, and the second connection end is connected with a pull-down circuit; the first connection end is configured to generate a level change signal when connected with the second connection end; and the control module is further configured to control the handheld device to operate in the first mode when the wake-up signal and the level change signal are detected.

[0012] In an embodiment, the handheld cleaning device further includes a third connection end; the third connection end is arranged on the handheld device, and the third connection end is connected with the second button and the control module; the third connection end is configured to output a detection signal when the second button is triggered; and the control module is further configured to control the handheld device to operate in the first mode when the wake-up signal and the detection signal are detected.

[0013] In an embodiment, the control module is further configured to determine the load type connected with the handheld device based on the working current of the handheld device when the handheld cleaning device is working; the load type is the cleaner main body or the accessory.

[0014] In an embodiment, the accessory includes a dust cup, an electric mattress brush, and an electric floor brush.

[0015] The hand-held cleaning device in the application comprises a hand-held device, a cleaning machine main body, an accessory, a detection circuit, a control module and a first button; the first button is arranged on the hand-held device; the hand-held device can be matched with the cleaning machine main body to realize the function of a floor cleaning machine, and the hand-held device can also be matched with the accessory to complete the function of a general dust collection device. In actual use, the control module can determine the load type currently connected to the hand-held device according to the signal output of the detection circuit and the triggering condition of the first button, so as to finally control the hand-held device to work in different cleaning modes based on different load types. Further, the hand-held cleaning device can work in different cleaning modes according to different application scenarios by controlling the hand-held device to work in different working modes. The utilization rate of the cleaning device is greatly improved, the application scenario of the cleaning device is expanded, and the product competitiveness is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. Other related drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 The connection diagram of the components in the hand-held cleaning device shown in an embodiment of the application;

[0018] Figure 2 The structure diagram of the first detection circuit shown in an embodiment of the application;

[0019] Figure 3 The structure diagram of the first detection circuit shown in another embodiment of the application;

[0020] Figure 4 The connection diagram of the first detection circuit and the control module shown in an embodiment of the application;

[0021] Figure 5 The structure diagram of the second detection circuit shown in an embodiment of the application;

[0022] Figure 6 The connection diagram of the cleaning machine main body and the hand-held device shown in an embodiment of the application;

[0023] Figure 7 The connection diagram of the cleaning machine main body and the hand-held device shown in another embodiment of the application.

[0024] Reference signs:

[0025] 1 - handheld cleaning device; 10 - handheld device; 11 - first button; 12 - control module; 13 - first connection end; 14 - third connection end; 15 - power supply module; 20 - detection circuit; 210 - first detection circuit; 211 - first branch; 212 - second branch; 220 - second detection circuit; 30 - cleaning machine main body; 31 - second button; 32 - trigger circuit; 33 - second connection end; DETAILED DESCRIPTION

[0026] The terms "first", "second", "third", and the like, are used only to distinguish descriptions, and do not indicate the arrangement sequence, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging", and the like, do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements.

[0030] The technical solutions of the present application will be described below in conjunction with the drawings.

[0031] Please refer to Figure 1 , which is a connection diagram of each component in the handheld cleaning device 1 of an embodiment of the present application. As shown in Figure 1 , the handheld cleaning device 1 in the present application includes a handheld device 10 (not shown in Figure 1 ), a cleaning machine main body 30 (not shown in Figure 1 ), and an accessory (not shown in Figure 1The handheld device 10 is connected with a cleaning machine main body 30 and an accessory. The handheld device 10 is provided with a detection circuit 20 and a control module 12. The handheld device 10 is further provided with a first button 11, which can be used to control the start and stop of the handheld device 10, or can be used to control the working gear of the handheld device 10. The cleaning machine main body 30 and the accessory are detachably connected with the handheld device 10. When the cleaning machine main body 30 is matched with the handheld device 10, the floor cleaning machine function can be realized. When the accessory is matched with the handheld device 10, the function of a general cleaning device can be realized. For example, the accessory can be a dust cup, an electric bed brush, an electric floor brush, etc. According to different cleaning scenes, the corresponding accessory can be selected to be matched with the handheld device 10. The control module 12 is connected with the detection circuit 20. The control module 12 is used to determine the load type connected with the handheld device 10 according to the signal output of the detection circuit 20 and the triggering condition of the first button 11, and control the handheld device 10 to work in different working modes based on the load type. Specifically, as shown in Figure 1 In the embodiment, the first button 11 is indirectly connected with the control module 12 by being electrically connected with the detection circuit 20, so that the control module 12 can detect the triggering condition of the first button 11 by hardware.

[0032] The cleaning equipment in the present application is powered by a battery pack and the like. In order to keep the power supply module 15 in good condition for a long time, the power supply module 15 is in a deep sleep state when the cleaning equipment is in an idle state. When the cleaning equipment needs to enter a working state, the power supply module 15 is awakened from the sleep state to supply power to the cleaning equipment, so that the cleaning work can be normally performed. Specifically, the power supply module 15 is awakened by the detection circuit 20 outputting a wake-up signal to the power supply module 15, so that the power supply module 15 can be awakened from the sleep state when receiving the wake-up signal. Since the power supply module 15 and the control module 12 are integrated in the embodiment, the detection circuit 20 can awaken the power supply module 15 by outputting a wake-up signal to the control module 12.

[0033] Based on the principle, the control module 12 in the application can determine the type of the load currently connected with the handheld device 10 based on the output of the wake-up signal and the triggering of the first button 11, and control the handheld device 10 to work in different modes based on the different types of the load. Further, by controlling the handheld device 10 to work in different modes, the handheld cleaning device 1 can run in different cleaning modes according to different application scenarios. Specifically, when the control module 12 detects that the detection circuit 20 outputs the wake-up signal and the first button 11 is not triggered within the preset time, it can be determined that the load currently connected with the handheld device 10 is the cleaner body 30, and at this time the handheld device 10 can be controlled to run in the scrubber mode (first mode). If the control module 12 detects that the detection circuit 20 outputs the wake-up signal and the first button 11 is triggered within the preset time, it can be determined that the load currently connected with the handheld device 10 is the accessory, and at this time the handheld device 10 can be controlled to run in the dust collection mode (second mode). Exemplarily, the preset time can be 5ms-10ms.

[0034] Please refer to Figure 2 , which is a structural schematic diagram of the first detection circuit 210 according to an embodiment of the application. As Figure 2 shown, the cleaner body 30 is provided with a second button 31, and the detection circuit 20 includes a first detection circuit 210 provided on the handheld device 10. The second button 31 is electrically connected with the first detection circuit 210, and the second button 31 can be used to control the opening or closing of the cleaner body 30, or the second button 31 can be used to control the working mode of the cleaner body 30. The first detection circuit 210 is used to output a wake-up signal when the first button 11 or the second button 31 is triggered.

[0035] As Figure 2 shown, the first detection circuit 210 in the embodiment includes a first branch 211 and a second branch 212. The first branch 211 is connected with the control module 12 and the first button 11, the second branch 212 is connected with the second button 31 and the control module 12, and the second branch 212 is connected with the control module 12 and the second button 31. The first branch 211 includes a diode D1 and a capacitor C2. The anode of the diode D1 is connected with the control module 12, and the cathode of the diode D1 is connected with the first button 11. One end of the capacitor C2 is connected with the first button 11, and the other end of the capacitor C2 is grounded. The second branch 212 includes a switching element Q 10 and a zener diode DZ1. The cathode of the zener diode DZ1 is connected with the gate of the MOS tube, and the anode of the zener diode DZ1 is grounded. Exemplarily, the switching element Q 10The MOS tube can be used, and at this time, the drain D of the MOS tube is connected with the control module 12, the gate G of the MOS tube is connected with the second button 31, and the source S of the MOS tube is grounded.

[0036] In an embodiment, as shown in Figure 2 , the first branch 211 and the second branch 212 can be connected with the control module 12 through the same connection end, and the first branch 211 and the second branch 212 can further include a current-limiting resistor R1, a current-limiting resistor R2, and a protection resistor R4. By setting the above resistors, the circuit is protected.

[0037] The principle of the first detection circuit 210 outputting the wake-up signal will be explained in detail below in combination with the structure of the first detection circuit 210 shown in Figure 2 .

[0038] When the first button 11 is triggered, the first branch 211 is turned on, and the first detection circuit 210 outputs the wake-up signal to the control module 12 through the first branch 211. When the second button 31 is triggered, the switch element Q 10 is turned on, the second branch 212 is turned on, and the first detection circuit 210 outputs the wake-up signal to the control module 12 through the second branch 212.

[0039] The principle of the control module 12 driving the handheld device 10 to work will be explained in detail below in combination with Figure 2 .

[0040] The control module 12 controls the handheld device 10 to operate in the dust collection mode when receiving the wake-up signal and identifying that the first button 11 is triggered. The control module 12 controls the handheld device 10 to operate in the scrubber mode when receiving the wake-up signal and identifying that the first button 11 is not triggered.

[0041] In another embodiment, as shown in Figure 3 , in this embodiment, the second button 31 can be indirectly connected with the second branch 212 through a trigger circuit 32. At this time, when the second button 31 is triggered, the trigger circuit 32 outputs a level change signal, and the switch element Q 10 is turned on through the level change signal.

[0042] In another embodiment, as shown in Figure 4As shown, in the embodiment, the control module 12 and the power supply module 15 are separated, and the first detection circuit 210 is indirectly connected with the control module 12 by being connected with the power supply module 15. At this time, the control module 12 can detect whether the first detection circuit 210 outputs the wake-up signal based on the current state of the power supply module 15. Specifically, when the control module 12 identifies that the power supply module 15 is woken up, it can be considered that the first detection circuit 210 has outputted the wake-up signal; when the control module 12 does not identify that the power supply module 15 is woken up, it can be considered that the first detection circuit 210 has not outputted the wake-up signal. After learning the output condition of the wake-up signal, the control module 12 can determine the type of the load currently connected with the handheld device 10 based on the triggering condition of the first button 11.

[0043] The principle of the control module 12 driving the handheld device 10 to work will be explained in detail below in combination with Figure 4

[0044] When the control module 12 detects that the power supply module 15 is woken up and identifies that the first button 11 is triggered, it controls the handheld device 10 to operate in the dust-suction mode. When the control module 12 detects that the power supply module 15 is woken up and identifies that the first button 11 is not triggered, it controls the handheld device 10 to operate in the scrubber mode.

[0045] The second detection circuit 220 provided by an embodiment of the present application will be described below in combination with Figure 5 As shown, the detection circuit 20 in the present application further includes a second detection circuit 220; the second detection circuit 220 includes a first connection end 13 and a second connection end 33; the first connection end 13 is arranged on the handheld device 10 and connected with the control module 12; the second connection end 33 is arranged on the cleaning machine main body 30 and used to be connected with the first connection end 13; the first connection end 13 is connected with a pull-up circuit, and the second connection end 33 is connected with a pull-down circuit; the second connection end 33 is used to generate a level change signal when being connected with the first connection end 13. Figure 5 As shown, the pull-up circuit can include a pull-up resistor R5, and the pull-down circuit can include a pull-down resistor R6. Figure 5 In another embodiment, the first connection end 13 can be connected with a pull-down circuit, and the second connection end 33 can be connected with a pull-up circuit.

[0046] The principle of the control module 12 driving the handheld device 10 to work will be explained in detail below in combination with

[0047] Figure 5 Figure 2

[0048] ​​​​When the control module 12 receives the wake-up signal and identifies that the first button 11 is triggered, the control module 12 controls the handheld device 10 to operate in the cleaning mode. When the control module 12 receives the wake-up signal and the level change signal and does not identify that the first button 11 is triggered within the preset time, the control module 12 controls the handheld device 10 to operate in the scrubber mode.

[0049] Through the above measures, the control module 12 controls the handheld device 10 to operate in the scrubber mode after receiving the wake-up signal and the level change signal at the same time, which fully guarantees the accuracy of the load type identification.

[0050] Please refer to Figure 6 , which is a connection diagram of the cleaning machine body 30 and the handheld device 10 according to an embodiment of the present application. As shown in Figure 6 , in the embodiment, the second connection end 33 is connected to the control module 12, and the first connection end 13 is arranged on the control module 12 and connected to the output end of the first branch 211. For example, as shown in Figure 3 , at this time, the first connection end 13 can be located at the WKUP position in the figure.

[0051] In the embodiment, when the handheld device 10 is connected to the cleaning machine body 30, the second connection end 33 can directly output the wake-up signal to the control module 12; when the handheld device 10 is connected to the accessory, the wake-up signal can be output to the control module 12 by the first connection end 13 through the triggering of the first button 11. Based on this, the control module 12 can determine the load type to which the handheld device 10 is currently connected by judging whether the wake-up signal is output by the first connection end 13 or the second connection end 33.

[0052] It is worth noting that the difference between the embodiment and the embodiment shown in Figure 2 is that in the embodiment, it is not necessary to detect whether the first button 11 is triggered, but only to detect whether the wake-up signal is output by the first connection end 13 or the second connection end 33, so as to determine the load type to which the handheld device 10 is currently connected, and the identification method is simple.

[0053] Please refer to Figure 7 , which is a connection diagram of the cleaning machine body 30 and the handheld device 10 according to another embodiment of the present application. As shown in Figure 7 , the difference between the embodiment and the embodiment shown in Figure 2 is that in the embodiment, the handheld cleaning device 1 further includes a third connection end 14; the third connection end 14 is arranged on the handheld device 10 and connected to the second button 31 and the control module 12, and is used to output a detection signal when the second button 31 is triggered; wherein the detection signal is a high-low level change signal.

[0054] In this embodiment, when the handheld device 10 is connected to the cleaner main body 30, the third connection end 14 can output a detection signal to the control module 12 when the second button 31 is triggered, so that the control module 12 can effectively identify that the second button 31 on the cleaner main body 30 is triggered after receiving the detection signal. Further, the control module 12 can control the handheld device 10 to operate in the scrubber mode when it is detected that the second button 31 is triggered and that the first detection circuit 210 outputs the wake-up signal. When the handheld device 10 operates, the handheld device 10 supplies power to the cleaner main body 30, and sends the button information to the cleaner main body through the electric control module communication circuit in the cleaner main body 30, so that the cleaner main body 30 can correctly respond to the button instruction.

[0055] The principle of the control module 12 driving the handheld device 10 to work will be described in detail below in combination with Figure 7 and Figure 2 .

[0056] When the control module 12 receives the wake-up signal and identifies that the first button 11 is triggered, it controls the handheld device 10 to operate in the dust collection mode. When the control module 12 receives the wake-up signal, detects that the second button is triggered, and does not identify that the first button 11 is triggered within a preset time, it controls the handheld device 10 to operate in the scrubber mode.

[0057] As can be seen from the above embodiments, the handheld cleaning device 1 provided in the present application includes the handheld device 10, the cleaner main body 30, the accessory, the detection circuit 20, the control module 12, and the first button 11. The control module 12 can determine the type of load currently connected to the handheld device 10 by the signal output of the detection circuit 20 and the triggering of the first button 11, and finally control the handheld device 10 to work in different cleaning modes based on different load types. Further, by controlling the handheld device 10 to work in different working modes, the handheld cleaning device 1 can operate in different cleaning modes according to different application scenarios, which greatly improves the utilization rate of the cleaning device, expands the application scenarios of the cleaning device, and improves the product competitiveness.

[0058] In an embodiment, during the operation of the handheld cleaning device 1, the control module 12 can also determine the type of load connected to the handheld device 10 based on the working current of the handheld device 10. Based on the load type, it is determined whether to supply power to the current load. When power supply is not required, power-off operation is performed; when power supply is required, the control module 12 sets corresponding current protection parameters for the handheld device 10 based on the current working current of the handheld device 10, so as to protect the load through this operation. The corresponding relationship between the current protection parameters of each load type is shown in Table 1.

[0059] Table 1 Load Type vs. Current Protection Parameter Table

[0060]

[0061] The above only is the preferred embodiment of the present application, and is not used to limit the present application, for the person skilled in the art, the present application can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hand-held cleaning apparatus, characterized in that, The application relates to a handheld cleaning device. The handheld device comprises a first button; A cleaning machine body and an accessory are detachably connected to the handheld device; A detection circuit is arranged on the handheld cleaning device; The handheld device further comprises a control module connected to the detection circuit, and the first button is electrically connected to the control module; When the control module detects that the detection circuit outputs a wake-up signal and the first button is not triggered within a preset time, the control module determines that the cleaning machine body is connected to the handheld device and controls the handheld device to operate in a first mode; when the control module detects that the detection circuit outputs a wake-up signal and the first button is triggered within a preset time, the control module determines that the accessory is connected to the handheld device and controls the handheld device to operate in a second mode.

2. The hand-cleaning device according to claim 1, characterized in that The detection circuit comprises a first detection circuit arranged on the handheld device; The handheld cleaning device further comprises: A second button arranged on the cleaning machine body and electrically connected to the first detection circuit; The first detection circuit outputs a wake-up signal when the first button or the second button is triggered.

3. The hand-cleaning device according to claim 2, characterized in that The first detection circuit comprises: A first branch connected to the control module; A second branch connected to the control module and provided with a switching element; The first button is connected to the first branch, and the second button is connected to the second branch; The first detection circuit outputs a wake-up signal through the first branch when the first button is triggered; The first detection circuit turns on the switching element and outputs a wake-up signal through the second branch when the second button is triggered.

4. The hand-cleaning device according to claim 3, characterized in that The first branch comprises: A diode with an anode connected to the control module and a cathode connected to the first button; A capacitor with one end connected to the first button and the other end grounded.

5. The hand-cleaning device according to claim 3, wherein The switching element is a MOS tube, the drain of the MOS tube is connected to the control module, the gate of the MOS tube is connected to the second button, and the source of the MOS tube is grounded.

6. The hand-cleaning device according to claim 5, characterized in that The second branch further comprises: A voltage stabilizing diode with a cathode connected to the gate of the MOS tube and an anode grounded.

7. The hand-cleaning device according to claim 2, wherein The detection circuit further comprises a second detection circuit; The second detection circuit comprises: A first connection end arranged on the handheld device and connected to the control module; A second connection end arranged on the cleaning machine body and used for connecting to the first connection end; The first connection end is connected to a pull-up circuit, and the second connection end is connected to a pull-down circuit; The first connection end generates a level change signal when connected to the second connection end; The control module controls the handheld device to operate in the first mode when the control module detects the wake-up signal and the level change signal.

8. The hand-cleaning device according to claim 2, wherein The handheld cleaning device further comprises: A third connection end arranged on the handheld device and connected to the second button and the control module; The third connection end outputs a detection signal when the second button is triggered; The control module is further configured to control the handheld device to operate in the first mode when the wake-up signal and the detection signal are detected.

9. The hand-cleaning device of claim 1, wherein, The control module is further configured to: determine a load type connected to the handheld device based on a working current of the handheld device when the handheld cleaning device is working, wherein the load type is a main body of a cleaning machine or an accessory.

10. The hand-cleaning device according to claim 1, characterized in that The accessory includes a dust cup, an electric bed mattress brush, and an electric floor brush.

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