Inflatable device

Abstract

This application relates to the technical field of inflatable devices, specifically to an inflatable device. The inflatable device includes an inflator mechanism, a charging circuit, a battery, a charging interface circuit, a charging detection circuit, and a controller. The battery is electrically connected to the charging circuit. The charging interface circuit is used to connect the charging device. The charging detection circuit is electrically connected to the charging interface circuit and outputs a charging trigger signal in response to the connection of the charging device. The controller is electrically connected to the inflator mechanism, the charging circuit, and the charging interface circuit, and controls the working state of the inflator mechanism based on the charging trigger signal. When the charging device is inserted into the charging interface circuit of the inflatable device, the charging detection circuit responds by outputting a charging trigger signal. The controller can flexibly control the working state of the inflator mechanism based on the charging trigger signal, which helps to ensure stable and reliable operation of the inflatable device and safe and reliable charging.

Description

Technical Field

[0001] This application relates to the technical field of inflatable devices, specifically to an inflatable device. Background Technology

[0002] Inflation equipment can inflate, deflate, or deflate user equipment. Typically, when an adapter is plugged in for charging during the inflation process, the existing inflation equipment stops inflating the user equipment and immediately enters charging mode. This results in the inflation process not being completed, leading to unreliable inflation and inconvenience for the user. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides an inflation device that improves upon the technical issue that existing inflation devices cannot flexibly control the working state of the inflation mechanism.

[0004] In a first aspect, embodiments of this application provide an inflation device, including an inflation mechanism, a charging circuit, a battery, a charging interface circuit, a charging detection circuit, and a controller. The battery is electrically connected to the charging circuit. The charging interface circuit is used to plug into the charging device. The charging detection circuit is electrically connected to the charging interface circuit and outputs a charging trigger signal in response to the plugging of the charging device into the charging interface circuit. The controller is electrically connected to the inflation mechanism, the charging circuit, and the charging interface circuit, respectively, and controls the operating state of the inflation mechanism based on the charging trigger signal.

[0005] Optionally, the charging circuit includes a charging chip, a power detection circuit, and a current detection circuit. The charging chip is electrically connected to both the controller and the battery, and is used to manage the battery. The power detection circuit is electrically connected to both the battery and the controller, and is used to detect the battery voltage, so that the controller generates power display information based on the battery voltage. The current detection circuit is electrically connected to both the battery and the controller, and is used to detect the battery's output current, so that the controller performs current protection operations based on the output current.

[0006] Optionally, the power detection circuit includes a first resistor and a second resistor connected in series. The first end of the first resistor is electrically connected to the battery, the second end of the first resistor is electrically connected to the first end of the second resistor and the controller, and the second end of the second resistor is grounded.

[0007] Optionally, the current detection circuit includes a current sampling circuit and a current amplification circuit. The current sampling circuit is electrically connected to the battery and is used to sample the output current of the battery to obtain a current sampling signal. The current amplification circuit is electrically connected to the current sampling circuit and the controller and is used to amplify the current sampling signal so that the controller performs current protection operation based on the amplified current sampling signal.

[0008] Optionally, the charging interface circuit includes a USB interface circuit and an overvoltage protection circuit. The USB interface circuit is used to connect a charging device, and includes a bus pin for outputting the charging voltage of the charging device. The overvoltage protection circuit is electrically connected to the bus pin and is used to pull down the charging voltage of the bus pin to a preset voltage in response to the charging voltage exceeding a preset voltage threshold.

[0009] Optionally, the charging detection circuit includes a third resistor, a fourth resistor, a fifth resistor, and a first NPN transistor. The first end of the third resistor is electrically connected to the charging interface circuit. The second end of the third resistor is electrically connected to the first end of the fourth resistor and the base of the first NPN transistor. The second end of the fourth resistor and the emitter of the first NPN transistor are grounded. An external voltage is applied to the first end of the fifth resistor. The second end of the fifth resistor is electrically connected to the collector of the first NPN transistor and the controller.

[0010] Optionally, the inflation device further includes a low-dropout linear regulator and a power consumption control circuit. The low-dropout linear regulator is electrically connected to the air pressure sensor, and the power consumption control circuit is electrically connected between the battery and the low-dropout linear regulator and also electrically connected to the controller. It is used to establish or disconnect the power supply circuit between the battery and the low-dropout linear regulator under the control of the controller.

[0011] Optionally, the power consumption control circuit includes a first Zener diode, a second Zener diode, a sixth resistor, and a first PMOS transistor. A first voltage is applied to the anode of the first Zener diode. The cathode of the first Zener diode is electrically connected to the cathode of the second Zener diode, the first terminal of the sixth resistor, the source of the first PMOS transistor, and the power supply pin of the controller. The anode of the second Zener diode is electrically connected to the positive terminal of the battery. The second terminal of the sixth resistor and the gate of the first PMOS transistor are both electrically connected to the controller. The drain of the first PMOS transistor is electrically connected to the low-dropout linear regulator.

[0012] Optionally, the inflation device further includes a button circuit and / or a display circuit, wherein the button circuit is electrically connected to the controller and the display circuit is electrically connected to the controller.

[0013] Optionally, the inflation device further includes a pressure sensor and / or a first temperature sampling circuit and / or a lighting circuit. The pressure sensor is electrically connected to the controller and is used to sample the pressure of the inflation mechanism. The first temperature sampling circuit is electrically connected to the controller and is used to sample the operating temperature of the battery. The lighting circuit is electrically connected to the controller.

[0014] The beneficial effects of this application embodiment are as follows: when the charging device is inserted into the charging interface circuit of the inflation device, the charging detection circuit responds to the insertion of the charging device into the charging interface circuit and outputs a charging trigger signal. Based on the charging trigger signal, the controller can flexibly control the working state of the inflation mechanism, which is conducive to enabling the inflation device to work stably and reliably, and to charge safely and reliably. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a schematic diagram of the circuit structure of an inflation device provided in an embodiment of this application;

[0017] Figure 2 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0018] Figure 3 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0019] Figure 4a A schematic diagram of gas flow in inflation mode for an inflation device provided in an embodiment of this application;

[0020] Figure 4b A schematic diagram of gas flow in an inflation device in either a suction or deflation mode, provided in an embodiment of this application.

[0021] Figure 5 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0022] Figure 6 for Figure 5 The diagram shows the specific circuit structure of the solenoid valve drive circuit.

[0023] Figure 7 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0024] Figure 8 for Figure 7 The diagram shows the specific circuit structure of the motor drive circuit.

[0025] Figure 9 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0026] Figure 10a for Figure 9 The schematic diagram of the specific circuit structure of the controller chip is shown.

[0027] Figure 10b for Figure 9 The diagram shows the specific circuit structure of the charging chip.

[0028] Figure 11 for Figure 9 The diagram shows the specific circuit structure of the power detection circuit.

[0029] Figure 12 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0030] Figure 13 for Figure 12 The schematic diagram of the specific circuit structure of the current sampling circuit shown is as follows;

[0031] Figure 14 for Figure 12 The schematic diagram of the specific circuit structure of the current amplifier circuit shown is as follows:

[0032] Figure 15 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0033] Figure 16 for Figure 15 The diagram shows the specific circuit structure of the battery protection circuit.

[0034] Figure 17 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0035] Figure 18 for Figure 1 The diagram shows the specific circuit structure of the charging interface circuit.

[0036] Figure 19 for Figure 1 The schematic diagram of the specific circuit structure of the charging detection circuit shown is as follows:

[0037] Figure 20 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0038] Figure 21 for Figure 20The schematic diagram of the specific circuit structure of the boost circuit shown is as follows;

[0039] Figure 22 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0040] Figure 23 for Figure 22 The diagram shows the specific circuit structure of the barometric pressure sensor.

[0041] Figure 24 for Figure 22 A schematic diagram of the specific circuit structure of the first temperature sampling circuit is shown below.

[0042] Figure 25 for Figure 22 The diagram shows the specific circuit structure of the lighting circuit.

[0043] Figure 26 for Figure 22 The diagram shows the specific circuit structure of the low dropout linear regulator and power consumption control circuit.

[0044] Figure 27 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0045] Figure 28 for Figure 27 The circuit diagram shown is a detailed circuit structure diagram of the reset button circuit.

[0046] Figure 29 for Figure 27 The schematic diagram of the specific circuit structure of the lighting button circuit is shown.

[0047] Figure 30 A circuit structure diagram of an inflation device provided in another embodiment of this application;

[0048] Figure 31 for Figure 30 The diagram shows the specific circuit structure of the display driver chip.

[0049] Figure 32 for Figure 30 The schematic diagram shows the specific circuit structure of the light-emitting diode array.

[0050] Figure 33 for Figure 30 The schematic diagram of the specific circuit structure of the adjustment button circuit is shown below.

[0051] Figure 34 for Figure 22 The diagram shows the specific circuit structure of the power supply circuit for the display. Detailed Implementation

[0052] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "electrically connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Furthermore, technical features involved in the different embodiments of this application described below may be combined with each other as long as they do not conflict with each other.

[0054] The following embodiments of this application provide an inflation device. Please refer to... Figure 1 The inflation device 10 includes an inflation mechanism 20, a charging circuit 30, a battery 40, a charging interface circuit 50, a charging detection circuit 60, and a controller 70.

[0055] The inflation mechanism 20 is electrically connected to the controller 70. The inflation mechanism 20 has inflation, degassing and deflation functions, and can inflate gas into the user equipment 110, or degas the internal gas of the user equipment 110, or deflate the internal gas of the user equipment 110.

[0056] The charging circuit 30 is electrically connected to the controller 70 and is used to charge the inflation device 10 under the control of the controller 70.

[0057] The battery 40 is electrically connected to the charging circuit 30 and is used to receive power from the charging circuit 30 for charging.

[0058] The charging interface circuit 50 is electrically connected to the controller 70 and is used to plug in charging devices, including adapters, etc.

[0059] The charging detection circuit 60 is electrically connected to the charging interface circuit 50 and the controller 70 respectively. It is used to respond to the charging device plugging into the charging interface circuit 50 and output a charging trigger signal. The controller 70 controls the working state of the inflation mechanism 20 based on the charging trigger signal. Therefore, the inflation device 10 can flexibly control the working state of the inflation mechanism 20 in combination with the charging status, which is conducive to the inflation device 10 working stably and reliably, and charging safely and reliably.

[0060] In some embodiments, when the controller 70 detects that the inflation mechanism 20 is in an inflation state in response to a charging trigger signal, it controls the inflation mechanism 20 to remain in an inflation state.

[0061] When the inflation mechanism 20 is in the inflation state, although the charging device has been inserted into the charging interface circuit 100, the inflation device 10 will not interrupt the inflation operation in order to enter the charging state. Instead, it will continue to control the inflation mechanism 20 to maintain the inflation state until the inflation mechanism 20 is de-inflated. Only then will the inflation device 10 enter the charging state. This avoids the user's device not being inflated with enough gas due to the interruption of the inflation operation in order to respond to charging. This ensures that the inflation device can reliably complete the inflation operation, which is beneficial to improving the user experience.

[0062] The inflation mechanism 20 includes an air passage assembly 21 and an air pump body 22. The air pump body 22 is connected to the air passage assembly 21 and is used to inflate the air passage assembly 21 or extract or release the gas flowing through the air passage assembly 22. The air pump body 22 also includes a motor 221.

[0063] In some embodiments, please refer to Figure 2 The inflation device 10 also includes a solenoid valve assembly 80, a solenoid valve drive circuit 90, and a motor drive circuit 100.

[0064] The solenoid valve assembly 80 is mounted on the pneumatic circuit assembly 21.

[0065] The solenoid valve drive circuit 90 is electrically connected to both the solenoid valve assembly 80 and the controller 70. It is controlled by the controller 70 to adjust the operating state of the solenoid valve assembly 80 to change the gas path state of the gas path assembly 21. The gas state includes a filling state, a evacuation state, or a deflation state. The filling state refers to the filling device 10 filling the user equipment 110 with gas. The evacuation state refers to the filling device 10 evacuating the internal gas of the user equipment 110. The deflation state refers to the filling device 10 releasing the internal gas of the user equipment 110 into the atmospheric environment.

[0066] The motor drive circuit 100 is electrically connected to both the motor 221 and the controller 70, and is controlled by the controller 70 to drive the motor 221 to flow gas through the gas path assembly 21. When the gas flows through the gas path assembly 21, the working state of the solenoid valve assembly 80 is adjusted by the solenoid valve drive circuit 90 to change the gas path state of the gas path assembly 21. When the gas path assembly 21 is in different gas path states, the flowing gas will exhibit different flow directions. For example, the flowing gas is injected into the user equipment 110 to achieve the inflation function, or the flowing gas flows out of the user equipment 110 to achieve the evacuation or deflation function.

[0067] In this embodiment, by installing a solenoid valve assembly 80 on the gas circuit assembly 21, the inflation device 10 can be controlled to perform any of the functions of inflation, de-inflation, and deflation simply by controlling the working state of the solenoid valve assembly 80. This eliminates the need for the inflation device to have multiple gas inlets to perform these functions, and also eliminates the need for the user to manually switch the inflation device to the corresponding gas inlet when it is in any of the inflation, de-inflation, or deflation states, thus avoiding the inconvenience of switching gas inlets.

[0068] Please see Figure 3 The solenoid valve assembly 80 includes a first solenoid valve 81 and a second solenoid valve 82. Both the first solenoid valve 81 and the second solenoid valve 82 are mounted on the pneumatic circuit assembly 21. Both the first solenoid valve 81 and the second solenoid valve 82 are electrically connected to the solenoid valve drive circuit 90. The controller 70 controls the working state of the solenoid valve drive circuit 90 to control the working state of the first solenoid valve 81 and the second solenoid valve 82.

[0069] Specifically, when the controller 70 controls the solenoid valve drive circuit 90 to drive the first solenoid valve 81 and the second solenoid valve 82 to the first type of state, the air path state of the air path assembly 21 is the charging state. When the controller 70 controls the solenoid valve drive circuit 90 to drive the first solenoid valve 81 and the second solenoid valve 82 to the second type of state, the air path state of the air path assembly 21 is the suction state or the degassing state.

[0070] Please see Figure 4a and Figure 4b The inflation mechanism 20 has a first cavity 201 and a second cavity 202. The air passage assembly 21 includes a first air passage 211, a second air passage 212, a third air passage 213, a fourth air passage 214, a fifth air passage 215, and a sixth air passage 216. The air pump body 22 includes a motor 221, a gas inlet 222, and a gas outlet 223. The motor 221 provides power to the inflation mechanism 20 so that gas enters the gas inlet 222 and is then output through the gas outlet 223.

[0071] One end of the first air passage 211 is connected to the first side of the first cavity 201, and the other end of the first air passage 211 is connected to the external atmospheric environment.

[0072] One end of the second gas passage 212 is connected to the second side of the first cavity 201, the first side of the first cavity 201 is arranged opposite to the second side, and the other end of the second gas passage 212 is connected to the gas outlet 223.

[0073] One end of the third gas passage 213 is connected to the second side of the first cavity 201, and the other end of the third gas passage 213 is connected to the gas inlet and outlet of the user equipment 110.

[0074] The first solenoid valve 81 is disposed in the first cavity 201. Under normal conditions, the first solenoid valve 81 closes the inlet between the first cavity 201 and the first gas passage 211, but connects the second gas passage 212 and the third gas passage 213. That is, under normal conditions, due to the obstruction of the first solenoid valve 81, the gas will not flow into the first gas passage 211 through the first side of the first cavity 201 and then be output to the atmospheric environment. However, the gas output through the gas outlet 223 can be transmitted to the third gas passage 213 through the second gas passage 212.

[0075] One end of the fourth air passage 214 is connected to the first side of the second cavity 202, and the other end of the fourth air passage 214 is connected to the external atmospheric environment. The second solenoid valve 82 is disposed inside the second cavity 202.

[0076] One end of the fifth gas passage 215 is connected to the second side of the second cavity 202, the first side of the second cavity 202 is arranged opposite to the second side, and the other end of the fifth gas passage 215 is connected to the gas inlet and outlet of the user equipment 110.

[0077] One end of the sixth gas passage 216 is connected to the second side of the second cavity 202, and the other end of the sixth gas passage 216 is connected to the gas inlet 222.

[0078] Under normal conditions, the second solenoid valve 82 closes the inlet between the second cavity 202 and the fifth gas passage 215, but connects the fourth gas passage 214 and the sixth gas passage 216. That is, under normal conditions, due to the obstruction of the second solenoid valve 82, gas will not flow into the fifth gas passage 215 through the second side of the second cavity 202 and then be output to the user equipment 110. However, atmospheric gas can be transmitted to the sixth gas passage 216 through the fourth gas passage 214.

[0079] Based on the air path topology of the air path component 21, the inflation principle, air extraction principle, and air deflation principle of the inflation device 10 are as follows:

[0080] ①Inflation principle:

[0081] The controller 70 controls the solenoid valve drive circuit 90 to drive the first solenoid valve 81 and the second solenoid valve 82 to be in normal state, that is, the first solenoid valve 81 and the second solenoid valve 82 are both in the first type state.

[0082] Under normal conditions, the first solenoid valve 81 closes the entrance between the first cavity 201 and the first air passage 211, but connects the second air passage 212 and the third air passage 213.

[0083] Under normal conditions, the second solenoid valve 82 closes the inlet between the second cavity 202 and the fifth air passage 215, but connects the fourth air passage 214 and the sixth air passage 216.

[0084] The controller 70 controls the motor drive circuit 100 to drive the motor 221 to work. When the motor 221 is working, the gas in the atmospheric environment flows into the first side of the second cavity 202 through the fourth gas passage 214, and then flows into the sixth gas passage 216, the gas inlet 222, the internal gas passage 217 of the air pump body 22, the second gas passage 212, the second side of the first cavity 201, the third gas passage 213, and the gas inlet and outlet of the user equipment 110 in sequence, thereby realizing the filling of the user equipment 110 with sufficient gas.

[0085] ② Principle of air extraction or air release:

[0086] The controller 70 controls the solenoid valve drive circuit 90 to drive both the first solenoid valve 81 and the second solenoid valve 82 to be in an active state, that is, both the first solenoid valve 81 and the second solenoid valve 82 are in the second type of state.

[0087] When the first solenoid valve 81 is in the activated state, it connects the inlet between the first cavity 201 and the first air passage 211, but disconnects the connection between the second air passage 212 and the third air passage 213.

[0088] When the second solenoid valve 82 is in the activated state, it connects the inlet between the second cavity 202 and the fifth air passage 215, but disconnects the connection between the fourth air passage 214 and the sixth air passage 216.

[0089] In the air extraction mode, the controller 70 controls the motor drive circuit 100 to drive the motor 221 to work. When the motor 221 is working, the internal gas of the user equipment 110 is drawn into the fifth air passage 215 through its gas inlet and outlet, and then sequentially passes through the second side of the first cavity 201, the sixth air passage 216, the gas inlet 222, the internal air passage 217 of the air pump body 22, the gas outlet 223, the second air passage 212, the first side of the first cavity 201, and the first air passage 211, thereby expelling the internal gas of the user equipment 110 from the atmospheric environment.

[0090] In the venting mode, the controller 70 controls the motor drive circuit 100 to stop the motor 221 from operating. The internal gas of the user equipment 110 flows into the fifth gas passage 215 through its gas inlet and outlet, and then sequentially passes through the second side of the first cavity 201, the sixth gas passage 216, the gas inlet 222, the internal gas passage 217 of the air pump body 22, the gas outlet 223, the second gas passage 212, the first side of the first cavity 201, and the first gas passage 211, thereby venting the internal gas of the user equipment 110 to the atmosphere.

[0091] In this embodiment, a first solenoid valve 81 and a second solenoid valve 82 are provided on the air circuit assembly 21. By controlling the first solenoid valve 81 and the second solenoid valve 82 to be in different categories, the air circuit state of the air circuit assembly 21 can be set to an inflation state, an air extraction state, or an air deflation state without the need for manual switching, which is beneficial to improving the working efficiency of the inflation device 10.

[0092] Please see Figure 5 The solenoid valve drive circuit 90 includes a first switching transistor 91, which is electrically connected to the first solenoid valve 81, the second solenoid valve 82, and the controller 70. The first switching transistor 91 is used to respond to the first control signal of the controller 70, enter the on state, so that the first driving current flows through the first solenoid valve 81 and the second solenoid valve 82 respectively, or to respond to the second control signal of the controller 70, enter the off state, so that the first driving current stops flowing through the first solenoid valve 81 and the second solenoid valve 82.

[0093] The first switching transistor 91 includes a transistor, a MOSFET, or other types of electronic switches or relays. The first switching transistor 91 can be an NPN transistor, a PNP transistor, an NMOS transistor, or a PMOS transistor.

[0094] In some embodiments, the first control signal is high and the second control signal is low. In other embodiments, the first control signal is low and the second control signal is high.

[0095] Please see Figure 6The first switching transistor is a first NMOS transistor Q1. The solenoid valve drive circuit 90 also includes a seventh resistor R7, a first capacitor C1, and a first diode D1. The gate of the first NMOS transistor Q1 is electrically connected to the controller 70 and the first terminal of the seventh resistor R7, respectively. The second terminal of the seventh resistor R7 is grounded. The source of the first NMOS transistor Q1 is grounded. The cathode of the first diode D1, the first terminal of the first capacitor C1, the anode of the first solenoid valve 81, and the anode of the second solenoid valve 82 are all subject to a driving voltage (e.g., 12V). The anode of the first diode D1, the second terminal of the first capacitor C1, the cathode of the first solenoid valve 81, and the cathode of the second solenoid valve 82 are all electrically connected to the drain of the first NMOS transistor Q1. It is understood that in some embodiments, the first capacitor C1 may be omitted in the solenoid valve drive circuit 90.

[0096] The working principle of the solenoid valve drive circuit 90 is as follows:

[0097] When the inflation device 10 enters the inflation mode, the controller 70 applies a low level to the first NMOS transistor Q1, and the first NMOS transistor Q1 enters the cut-off state. The first drive current will not flow through the first solenoid valve 81 and the second solenoid valve 82. Therefore, the first solenoid valve 81 and the second solenoid valve 82 are both in normal state, and the gas is inflated according to the inflation principle described in the above embodiment, thereby realizing the inflation function.

[0098] When the inflation device 10 enters the air extraction mode or the air release mode, the controller 70 applies a high level to the first NMOS transistor Q1, and the first NMOS transistor Q1 enters the conducting state. The first driving current flows through the first solenoid valve 81 and the second solenoid valve 82. Therefore, both the first solenoid valve 81 and the second solenoid valve 82 are activated, and the gas is pumped according to the air extraction principle or the air release principle described in the above embodiment, thereby realizing the air extraction function or the air release function.

[0099] Please see Figure 7 The motor drive circuit 100 includes a second switch 101, which is electrically connected to the motor 221 and the controller 70 respectively. It is used to respond to the first motor signal of the controller 70, enter the on state to control the motor 221 to work, or respond to the second motor signal of the controller 70, enter the off state to control the motor 221 to stop working.

[0100] The second switching transistor 101 includes a transistor, a MOSFET, or other types of electronic switches or relays. The second switching transistor 101 can be an NPN transistor, a PNP transistor, an NMOS transistor, or a PMOS transistor.

[0101] In some embodiments, the first motor signal is high and the second motor signal is low. In other embodiments, the first motor signal is low and the second motor signal is high.

[0102] Please see Figure 8 The second switch 101 is the second NMOS transistor Q2. The motor drive circuit 100 also includes an eighth resistor R8 and a second diode D2. The gate of the second NMOS transistor Q2 is electrically connected to the controller 70 and the first end of the eighth resistor R8, respectively. The second end of the eighth resistor R8 is grounded. The source of the second NMOS transistor Q2 is grounded. The second diode D2 is connected in parallel with the motor 221 and then electrically connected to the drain of the second NMOS transistor Q2.

[0103] The working principle of the motor drive circuit 100 is as follows:

[0104] When the inflation device 10 enters the inflation mode, the deflation mode, or the air extraction mode, the controller 70 sends a high level to the gate of the second NMOS transistor Q2, the second NMOS transistor Q2 enters the conduction state, the second drive current flows through the motor 221, and the motor 221 starts to work.

[0105] When the inflation device 10 is not required to work, the controller 70 sends a low level to the gate of the second NMOS transistor Q2, the second NMOS transistor Q2 enters the cut-off state, no second drive current flows through the motor 221, and the motor 221 stops working.

[0106] Please see Figure 9 The charging circuit 30 includes a charging chip 31, a power detection circuit 32, and a current detection circuit 33.

[0107] Please see Figure 10a and Figure 10b The charging chip 31 is electrically connected to both the controller 70 and the battery 40, and is used to manage the battery 40, enabling it to be charged stably and reliably. The battery 40 is electrically connected to the charging circuit 60, and is used to store power and provide the power required for the inflation device 10 to operate.

[0108] Specifically, the controller 70 sends an enable signal CHARGE_EN to the charging chip 31. The charging chip 31 responds to the enable signal CHARGE_EN and enters the corresponding operating state. When the enable signal CHARGE_EN is high, the charging function of the charging chip 31 is enabled. When the enable signal CHARGE_EN is low, the charging function of the charging chip 31 is disabled.

[0109] The power detection circuit 32 is electrically connected to the battery 40 and the controller 70 respectively, and is used to detect the voltage of the battery 40. The controller 70 generates power display information of the battery 40 based on the voltage of the battery 40. The power display information is used to indicate the power of the battery 40.

[0110] Please see Figure 11The power detection circuit includes a first resistor R1 and a second resistor R2 connected in series. The first end of the first resistor R1 is electrically connected to the battery, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2 and the controller 70, and the second end of the second resistor R2 is grounded.

[0111] The voltage between the first resistor R1 and the second resistor R2 is the sampling voltage. The controller 70 calculates the battery power of the battery 40 based on the sampling voltage and generates battery power display information based on the battery power of the battery 40.

[0112] The current detection circuit 33 is electrically connected to the battery 40 and the controller 70 respectively, and is used to detect the output current of the battery 40. The output current can be the current flowing through the motor 221, the current flowing through the first solenoid valve and the second solenoid valve, or the sum of the current flowing through the motor 221 and the current flowing through the first solenoid valve and the second solenoid valve, etc.

[0113] Please see Figure 12 The current detection circuit 33 includes a current sampling circuit 331 and a current amplification circuit 332. The current sampling circuit 331 is electrically connected to the battery 40 and is used to sample the output current of the battery 40 to obtain a current sampling signal. The current amplification circuit 332 is electrically connected to the current sampling circuit 331 and the controller 70 and is used to amplify the current sampling signal so that the controller 70 performs current protection operation based on the amplified current sampling signal.

[0114] When the controller 70 detects an abnormality in the output current of the battery 40 based on the amplified current sampling signal, the controller 70 notifies the charging chip 31 to control the battery 40 to stop supplying power to the motor 221. When the controller 70 detects the output current of the battery 40 based on the amplified current sampling signal, the charging chip 31 controls the battery 40 to supply power normally.

[0115] Please see Figure 13 The current sampling circuit 331 is a resistor network composed of multiple resistors. For example... Figure 13 As shown, the current sampling circuit 331 includes resistors R9 to R13. The first end of resistor R9 is electrically connected to the current input node of the inflation device 10, and the second end of resistor R9 is electrically connected to the negative terminal of the battery 40. The current input node is electrically connected to motor 221, first solenoid valve 81, and second solenoid valve 82, respectively.

[0116] Please see Figure 14The current amplification circuit 332 includes fourteenth resistors R14 to seventeenth resistors R17, second capacitors C2 to fourth capacitors C4, and amplifier U1. The positive terminal of amplifier U1 is electrically connected between tenth resistor R10 and eleventh resistor R11, and the negative terminal of amplifier U1 is electrically connected between twelfth resistor R12 and thirteenth resistor R13. The current flowing through motor 221 passes through ninth resistor R9 to obtain a current sampling signal. The current sampling signal is transmitted to amplifier U1 through tenth resistors R10 to thirteenth resistor R13. Amplifier U1 outputs the amplified current sampling signal to controller 70.

[0117] Please see Figure 15 The charging circuit 30 also includes a battery protection circuit 34, which is electrically connected between the positive and negative terminals of the battery 40 and is used to perform battery protection operations. When the battery protection circuit 34 detects overvoltage, overcurrent, or other phenomena in the battery 40 during charging or discharging, the battery protection circuit 34 performs battery protection operations to ensure that the battery is in a safe and reliable state.

[0118] Please see Figure 16 The battery protection circuit 34 includes a battery protection chip U2, an eighteenth resistor R18, a nineteenth resistor R19, and a fifth capacitor C5. The battery protection chip U2 can effectively monitor the voltage and current of the battery 40 and implement protection measures such as overcharge, over-discharge, overcurrent, and load short circuit to ensure that the battery 40 operates in a safe and efficient state.

[0119] Please see Figure 17 The charging interface circuit 50 includes a USB interface circuit 51 and an overvoltage protection circuit 52. The USB interface circuit 51 is used to connect a charging device and includes a bus pin for outputting the charging voltage of the charging device. The overvoltage protection circuit 52 is electrically connected to the bus pin and is used to pull down the charging voltage of the bus pin to the preset voltage in response to the charging voltage exceeding a preset voltage threshold.

[0120] Please see Figure 18 The USB interface circuit 51 includes a TYPE-C interface U3, a twentieth resistor R20, a twenty-first resistor R21, a sixth capacitor C6, and a seventh capacitor C7. The overvoltage protection circuit 52 includes a TVS diode ZD0. When the charging device's interface is plugged into the TYPE-C interface U3, the TYPE-C interface U3 outputs a 5V voltage through the bus pin VBUS. When the voltage output by the TYPE-C interface U3 through the bus pin VBUS exceeds 5V, the TVS diode ZD0 can pull the charging voltage of the bus pin down to a preset voltage, thereby protecting the subsequent circuitry from excessive voltage.

[0121] Please see Figure 19The charging detection circuit 60 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first NPN transistor Q3. The first end of the third resistor R3 is electrically connected to the charging interface circuit 50. The second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the base of the first NPN transistor Q3. The second end of the fourth resistor R4 and the emitter of the first NPN transistor Q3 are grounded. An external voltage VDD is applied to the first end of the fifth resistor R5. The second end of the fifth resistor R5 is electrically connected to the collector of the first NPN transistor Q3 and the controller 70.

[0122] The working principle of the charging detection circuit 60 is as follows:

[0123] When the charging device is plugged into the charging interface circuit 50, the charging interface circuit 50 outputs a 5V high level (i.e., a charging trigger signal). The charging trigger signal is applied to the base of the first NPN transistor Q3. When the charging trigger signal is high, the first NPN transistor Q3 enters the conducting state, pulling down the collector voltage, and the controller 70 detects the low level. The controller 70 responds to the low level by detecting whether the inflation mechanism 20 is in an inflation state. If so, it controls the inflation mechanism 20 to remain in an inflation state; otherwise, it controls the charging chip to operate.

[0124] Please see Figure 20 The inflation device 10 also includes a boost circuit 120, which is electrically connected to the battery 40, the solenoid valve drive circuit 90, and the motor drive circuit 100, respectively. The boost circuit 120 is used to boost the voltage of the battery 40 to obtain a drive voltage. This drive voltage is transmitted to the solenoid valve drive circuit 90 and the motor drive circuit 100 to drive them to operate. The drive voltage is 12V.

[0125] Please see Figure 21 The boost circuit 120 includes capacitors C8 to C21 (eighth), resistors R22 to R30 (twentieth), a fuse F1, an inductor L1, a switch Q4, and a boost chip U4. The boost circuit 120 can boost the voltage of the battery 40 (2.8V to 4.2V) to 12V. The 12V output voltage can be supplied to the solenoid valve drive circuit 90 and the motor drive circuit 100 to reliably drive the solenoid valve assembly 80 and the motor 221.

[0126] Please see Figure 22 The inflation device 10 also includes a pressure sensor 130, a first temperature sampling circuit 140, a second temperature sampling circuit 150, a lighting circuit 160, a low-dropout linear regulator 170, a power consumption control circuit 180, a button circuit 190, a display circuit 200, and a display power supply circuit 210.

[0127] The air pressure sensor 130 is electrically connected to the controller 70 and is used to sample the air pressure of the inflation mechanism 20. The controller 70 controls the working state of the motor 221 based on the air pressure of the inflation mechanism 20.

[0128] In inflation mode, when the controller 70 detects that the air pressure of the inflation mechanism 20 has reached the preset inflation threshold, the controller 70 controls the motor 221 to stop working. When the controller 70 detects that the air pressure of the inflation mechanism 20 has not reached the preset inflation threshold, the controller 70 controls the motor 221 to continue working.

[0129] In the deflation mode, when the controller 70 detects that the air pressure of the inflation mechanism 20 has reached the preset deflation threshold, the controller 70 enters the deflation mode and controls the motor 221 to work.

[0130] In the air-vacuuming mode, when the controller 70 detects that the air pressure of the inflation mechanism 20 has reached the preset minimum threshold, the controller 70 controls the motor 221 to stop working.

[0131] Please see Figure 23 The pressure sensor 130 includes a pressure detection chip U5, a thirty-first resistor R31, a thirty-second resistor R32, and a twenty-second capacitor C22. The pressure detection chip U5 samples the pressure of the inflation mechanism 20 and communicates with the controller 70 through the SDA_SER and SCL_SER pins to transmit the pressure of the inflation mechanism 20 to the controller 70.

[0132] In some embodiments, please continue reading Figure 23 The barometric pressure sensor 130 also includes a thirty-third resistor R33, which is used for impedance matching.

[0133] The first temperature sampling circuit 140 is electrically connected to the controller 70 and is used to sample the operating temperature of the battery 40. The controller 70 monitors the operating status of the battery 40 based on the operating temperature of the battery 40. When the operating temperature of the battery 40 exceeds a first temperature threshold, the controller 70 generates a first alarm message to alert the user that the battery 40 is overheating. Alternatively, the controller 70 controls the charging chip 31 to stop charging the battery 40, or the controller 70 notifies the charging chip 31 to control the battery 40 to stop discharging, thereby protecting the battery 40 from damage due to overheating.

[0134] Please see Figure 24 The first temperature sampling circuit 140 includes a thirty-fourth resistor R34 and a negative temperature coefficient resistor NTC. The negative temperature coefficient resistor NTC is disposed adjacent to or close to the battery 90 and is used to sample the operating temperature of the battery 40.

[0135] The second temperature sampling circuit 150 is electrically connected to the controller 70 and is used to sample the operating temperature of the solenoid valve assembly 80. When the operating temperature of the solenoid valve assembly 80 exceeds the second temperature threshold, the controller 70 generates a second alarm message to alert the user that the temperature of the solenoid valve assembly 80 is too high, or the controller 70 controls the solenoid valve assembly 80 to stop working.

[0136] The second temperature sampling circuit 150 is a temperature sensor, such as a surface-mount temperature sensor, attached to the solenoid valve assembly 80. Please refer to 23; the output of the temperature sensor is inserted into interface J1. In some embodiments, please refer to... Figure 23 The second temperature sampling circuit 150 includes a thirty-fifth resistor R35, which assists the temperature sensor in temperature detection.

[0137] The lighting circuit 160 is electrically connected to the controller 70 and is used to generate light under the control of the controller 70.

[0138] Please see Figure 25 The lighting circuit 160 includes a light source 161, a thirty-sixth resistor R36, a thirty-seventh resistor R37, a twenty-third capacitor C23, and a fifth NMOS transistor Q5.

[0139] The controller 70 outputs a control signal LED_DRV to the fifth NMOS transistor Q5. When the control signal LED_DRV is high, the fifth NMOS transistor Q5 is turned on, and under the action of 12V voltage, the driving current flows through the light source 161, thereby driving the light source 161 to emit light. When the control signal LED_DRV is low, the fifth NMOS transistor Q5 is turned off, and the light source 161 stops emitting light.

[0140] The low-dropout linear regulator 170 is electrically connected to the barometric pressure sensor 130.

[0141] The power consumption control circuit 180 is electrically connected between the battery 40 and the low dropout linear regulator 170 and is also electrically connected to the controller 70. It is used to establish or disconnect the power supply loop between the battery 40 and the low dropout linear regulator 170 under the control of the controller 70.

[0142] When the inflation device 10 is in the off state, the controller 70 disconnects the power supply circuit between the battery 40 and the low-dropout linear regulator 170. The low-dropout linear regulator 170 cannot output power to the pressure sensor 130, thereby reducing the power consumption of the pressure sensor 130 in the off state, which helps to reduce the overall power consumption of the device.

[0143] When the inflation device 10 is in operation, the controller 70 establishes a power supply circuit between the battery 40 and the low-dropout linear regulator 170. The low-dropout linear regulator 170 outputs power to the pressure sensor 130, thereby ensuring that the pressure sensor 130 can work normally.

[0144] Please see Figure 26 The low-dropout linear regulator 170 includes a low-dropout linear regulator chip U6 and capacitors C24 through C26. The low-dropout linear regulator chip U6 outputs a 3.3V voltage to the pressure sensor 130.

[0145] Please see Figure 27 The power consumption control circuit 180 includes a first diode ZD1, a second diode ZD2, a sixth resistor R6, and a first PMOS transistor Q6. A first voltage, the voltage of the positive terminal of the battery, is applied to the anode of the first diode ZD1. The cathode of the first diode ZD1 is electrically connected to the cathode of the second diode ZD2, the first terminal of the sixth resistor R6, the source of the first PMOS transistor Q6, and the power supply pin of the controller 70. The anode of the second diode ZD2 is electrically connected to the positive terminal of the battery 40. The second terminal of the sixth resistor R6 and the gate of the first PMOS transistor Q6 are both electrically connected to the controller 70. The drain of the first PMOS transistor Q6 is electrically connected to the low-dropout linear regulator 170. The first diode ZD1 and the second diode ZD2 can be ordinary diodes or Zener diodes.

[0146] When the inflation device 10 is in the off state, when the controller 70 applies a high level to the gate of the first PMOS transistor Q6, the first PMOS transistor Q6 enters the cut-off state, and the low dropout linear regulator 170 has no power input. Therefore, the low dropout linear regulator 170 cannot output power to the pressure sensor 130. Thus, the pressure sensor 130 does not consume power in the off state, thereby saving power consumption.

[0147] When the controller 70 applies a low level to the gate of the first PMOS transistor Q6, the first PMOS transistor Q6 enters the conducting state. The low dropout linear regulator 170 converts the voltage output by the battery 40 into a 3.3V voltage and outputs a 3.3V voltage to the pressure sensor 130, ensuring that the pressure sensor 130 can work normally.

[0148] The button circuit 190 is electrically connected to the controller 70 and is used to receive user button operations.

[0149] Please see Figure 28 The button circuit 190 includes a reset button circuit 191, an illumination button circuit 192, and a start / stop button circuit 193.

[0150] The reset button circuit 191 is electrically connected to the controller 70 and is used to trigger the controller 70 to perform a reset operation. Please refer to [link / reference needed]. Figure 29 The reset button circuit 191 includes a third diode D3, a fourth diode D4, a thirty-eighth resistor R38 to a forty-second resistor R42, and a seventh switch Q7 to a tenth switch Q10.

[0151] Please see Figure 30 The lighting button circuit 192 includes a first button K1, which is electrically connected to the positive terminal of the third diode D3 and the controller 70. The start / stop button circuit 193 includes a second button K2, which is electrically connected to the positive terminal of the fourth diode D4 and the controller 70.

[0152] When the user briefly presses the first button K1, the controller 70 detects a low-level input and sets the operating mode according to preset logic. When the user presses and holds the first button K1, the controller 70 detects a low-level input for a preset duration and sends a control signal to the lighting circuit 160 to control the lighting circuit 160 to generate light.

[0153] When the inflation device 10 is in operation, and the user presses the second button K2 alone, the controller 70 detects a low-level input and controls the inflation device 10 to stop working. When the inflation device 10 is in a stopped working state, and the user presses the second button K2 alone, the controller 70 detects a low-level input and controls the inflation device 10 to resume operation.

[0154] When the user presses the first button K1 and the second button K2 simultaneously, the seventh switch Q7 and the eighth switch Q8 are both turned on, the ninth switch Q9 is turned off, and the tenth switch Q10 is turned on. This pulls the voltage of the power supply pin VDD_MCU of the controller 70 low, and the controller 70 enters a power-down state. Then, when the user releases the first button K1 and the second button K2, or releases either button, power is restored to the power supply pin VDD_MCU of the controller 70. At this point, the controller 70 enters a reset state and performs a reset operation.

[0155] The display circuit 200 is electrically connected to the controller 70 and is used to display the battery power and / or charging status of the battery 40. Please refer to [link / reference]. Figure 31 The display circuit 200 includes a display driver chip 201, a light-emitting diode array 202, and an adjustment button circuit 203.

[0156] The display driver chip 201 is electrically connected to the light-emitting diode array 202 and the adjustment button circuit 203 respectively, and is used to drive the light-emitting diode array 202 to emit light.

[0157] Please see Figure 32The display driver chip 201 is electrically connected to the light-emitting diode array 202 and the adjustment button circuit 203 through its own pins.

[0158] Please continue reading. Figure 32 The light-emitting diode array 202 includes multiple light-emitting diodes arranged in a matrix. Each light-emitting diode, or each row of light-emitting diodes, or each column of light-emitting diodes, or one or more light-emitting diodes selected according to a preset rule, forms a light-emitting unit used to indicate the power of the battery 40 or the working status of the charging device 10.

[0159] The working principle of the LED array 202 is as follows: When the first column of LEDs needs to light up, the display driver chip 201 outputs a high level through pin A and sets pins GRID1 to GRID6 to a low level, while pin GRID7 is at a high level. At this time, the driving current flows through the first column of LEDs, driving the first column of LEDs to light up.

[0160] Please see Figure 33 The adjustment button circuit 203 includes a third button K3, a fourth button K4, a forty-third resistor R43, a forty-fourth resistor R44, a fifth diode D5, and a sixth diode D6.

[0161] When the user presses the third button K3, the inflation device 10 can increase the inflation speed or deflation speed, or increase the inflation time or deflation time, etc.

[0162] When the user presses the fourth button K4, the inflation device 10 can reduce the inflation speed, reduce the inflation time, or reduce the deflation time, etc.

[0163] The display power supply circuit 210 is electrically connected to the display circuit 200 and is used to provide power to the display circuit 200. Please refer to [link / reference]. Figure 34 The display power supply circuit 210 includes a power chip U7, capacitors C28 (28th) to C31 (31st), capacitor R45 (45th) to resistor R47 (47th), and a second inductor L2. The power chip U7 can reduce the 12V voltage to 5V and transmit the 5V voltage to the display driver chip 201, ensuring the normal operation of the display driver chip 201.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An inflator device characterized by, include: Inflatable mechanism; Charging circuit; The battery is electrically connected to the charging circuit; Charging interface circuit, used to plug in charging devices; A charging detection circuit, electrically connected to the charging interface circuit, is used to output a charging trigger signal in response to the charging device being plugged into the charging interface circuit. The controller is electrically connected to the inflation mechanism, the charging circuit, and the charging interface circuit, respectively, and is used to control the working state of the inflation mechanism based on the charging trigger signal.

2. An inflator according to claim 1, wherein The charging circuit includes: A charging chip is electrically connected to both the controller and the battery, and is used to manage the battery. A power detection circuit, electrically connected to both the battery and the controller, is used to detect the voltage of the battery so that the controller can generate power display information based on the battery voltage. A current detection circuit is electrically connected to both the battery and the controller to detect the output current of the battery, so that the controller can perform current protection operation based on the output current.

3. The inflation device according to claim 2, characterized in that, The power detection circuit includes a first resistor and a second resistor connected in series. The first end of the first resistor is electrically connected to the battery, and the second end of the first resistor is electrically connected to the first end of the second resistor and the controller. The second end of the second resistor is grounded.

4. An inflator according to claim 2, wherein The current detection circuit includes: A current sampling circuit, electrically connected to the battery, is used to sample the output current of the battery to obtain a current sampling signal; A current amplification circuit, electrically connected to the current sampling circuit and the controller, is used to amplify the current sampling signal so that the controller performs current protection operation based on the amplified current sampling signal.

5. The inflator apparatus according to claim 1, wherein The charging interface circuit includes: A USB interface circuit is used to connect a charging device. The USB interface circuit includes a bus pin, which is used to output the charging voltage of the charging device. An overvoltage protection circuit, electrically connected to the bus pin, is used to pull down the charging voltage of the bus pin to the preset voltage in response to the charging voltage exceeding a preset voltage threshold.

6. The inflator apparatus according to claim 1, wherein The charging detection circuit includes a third resistor, a fourth resistor, a fifth resistor, and a first NPN transistor. The first end of the third resistor is electrically connected to the charging interface circuit. The second end of the third resistor is electrically connected to the first end of the fourth resistor and the base of the first NPN transistor. The second end of the fourth resistor and the emitter of the first NPN transistor are grounded. An external voltage is applied to the first end of the fifth resistor. The second end of the fifth resistor is electrically connected to the collector of the first NPN transistor and the controller.

7. An inflator according to any one of claims 1 to 6, wherein Also includes: Low-dropout linear regulator, electrically connected to the pressure sensor; A power consumption control circuit is electrically connected between the battery and the low-dropout linear regulator and also electrically connected to the controller, for establishing or disconnecting the power supply circuit between the battery and the low-dropout linear regulator under the control of the controller.

8. An inflator according to claim 7, wherein The power consumption control circuit includes a first Zener diode, a second Zener diode, a sixth resistor, and a first PMOS transistor. A first voltage is applied to the anode of the first Zener diode. The cathode of the first Zener diode is electrically connected to the cathode of the second Zener diode, the first terminal of the sixth resistor, the source of the first PMOS transistor, and the power supply pin of the controller. The anode of the second Zener diode is electrically connected to the positive terminal of the battery. The second terminal of the sixth resistor and the gate of the first PMOS transistor are both electrically connected to the controller. The drain of the first PMOS transistor is electrically connected to the low dropout linear regulator.

9. An inflator according to any one of claims 1 to 6, wherein Also includes: The button circuit is electrically connected to the controller; and / or, The display circuit is electrically connected to the controller.

10. An inflator according to any one of claims 1 to 6, wherein Also includes: A pressure sensor, electrically connected to the controller, is used to sample the pressure of the inflation mechanism; And / or, A first temperature sampling circuit, electrically connected to the controller, is used to sample the operating temperature of the battery; and / or, The lighting circuit is electrically connected to the controller.

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