Pressure gauge assembly, air pump, circuit and air pumping method

Abstract

The present invention provides a pressure gauge assembly, an air pump, a circuit, and an air pumping method. The pressure gauge assembly includes: a display screen for receiving control from a control mainboard and displaying the pressure value; a pressure sensor for detecting air pressure and transmitting the detected air pressure signal to the control mainboard; a control mainboard for receiving the air pressure signal and controlling the display screen to display the pressure value in real time according to the air pressure signal; or, collecting the digital signal pressure generated by the rotation of a rotary encoder and controlling the display screen to display the set inflation pressure value; a rotary encoder electrically connected to the control mainboard. The rotary encoder is introduced into the air pump and the rotary encoder is cleverly combined with the display screen, so the pressure gauge assembly is small in size, easy to operate, and portable; and has low cost. When the pressure gauge assembly is used in the air pump, the pressure gauge assembly is arranged in the thickness direction of the air pump, so the areas on the front of the air pump where internal components are not arranged can be hollowed out, saving volume and cost.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure gauges, and in particular to a pressure gauge assembly, an air pump, a circuit and an air pumping method. Background Art

[0002] A pressure gauge is a test tool used to measure the tire pressure of a vehicle, and a general air pump is equipped with a pressure gauge. Air pumps have a wide range of uses, such as using air pumps to inflate car tires, leather balls, bicycle tires, rubber boats, etc. The design of existing air pumps is unreasonable. When the air pump inflates the inflatable parts, in order to prevent the above-mentioned tire pressure from being too high or too low, a pressure gauge is used to accurately measure the tire pressure, thereby monitoring the tire pressure at all times to ensure driving safety. Alternatively, the tire pressure can be set in advance, and then automatically inflated to the ideal pressure by the air pump. However, the existing technology generally uses a button to set the air pressure value, and two display screens are set, one to display the set pressure and the other to display the real-time pressure, resulting in a larger size of the air pump.

[0003] Secondly, in order to improve efficiency, existing air pumps use high-power motors and large cylinder diameters. They are mainly used in applications with large air output (such as inflating car tires). Therefore, the design volume of their inflation core is large, resulting in a corresponding increase in the volume of their external shell.

[0004] The prior art lacks a pressure gauge assembly and an air pump that are small in size, low in cost, and high in efficiency.

[0005] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Summary of the Invention

[0006] In order to solve the existing problems, the present invention provides a pressure gauge assembly, an air pump, a circuit and an air pumping method.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0008] A pressure gauge assembly comprises: a display screen, a pressure sensor, a control mainboard and a rotary encoder; the display screen is used to receive control from the control mainboard and display the pressure value; the pressure sensor is used to detect air pressure and transmit the detected air pressure signal to the control mainboard; the control mainboard is used to receive the air pressure signal and control the display screen to display the pressure value in real time according to the air pressure signal; or, collect the digital signal pressure generated by the rotation of the rotary encoder and control the display screen to display the set inflation pressure value; the rotary encoder is electrically connected to the control mainboard.

[0009] Preferably, the display screen is an LCD display screen; and the control main board is a PCB board.

[0010] Preferably, it includes: a watch case and a watch base, the watch case is fixedly connected to the watch base; a PCB board fixing plate, an LCD display screen, a backlight panel, a conductive strip, a printed circuit board, and a rotating support frame are sequentially included between the watch case and the watch base; the rotating support frame passes through the watch base and is connected to a rotary switch, and the rotary switch is fixedly connected to the watch base.

[0011] Preferably, the watch case and the watch base are fixedly connected via an inverted hook; the watch base and the rotary switch are fixedly connected via an inverted hook.

[0012] Preferably, different rotation speeds of the rotary encoder generate different pressures of the digital signal.

[0013] The present invention further provides an air pump, comprising: a housing, the housing comprising a first half shell and a second half shell, the first half shell and the second half shell being fastened together to form a mounting cavity, the pressure gauge assembly as described above being disposed in the mounting cavity with the display screen facing outward;

[0014] A driving assembly includes a driving motor and a cylinder arranged in the installation cavity, wherein the central axis of the driving motor is perpendicular to the central axis of the cylinder and the central axis of the cylinder is parallel to the central axis of the pressure gauge assembly; a control assembly is arranged in the installation cavity and located below the pressure gauge assembly, and is used to identify the inflation mode and the charging mode, and to control the driving assembly and the pressure gauge assembly; a switch assembly is connected to the control assembly and is used to start the air pump.

[0015] Preferably, the pressure gauge assembly is fixed on a printed circuit board; a wire hole is provided on the printed circuit board for introducing the wires of the control assembly into the pressure gauge assembly.

[0016] Preferably, it further includes a detachable power supply assembly, which is arranged at the bottom of the shell and electrically connected to the shell; or, includes an electrical connection hole for connecting to an external power supply.

[0017] Preferably, a cooling fan is provided below the cylinder of the driving assembly, and the housing is provided with ventilation holes for the cooling fan to dissipate heat.

[0018] The present invention further provides a circuit, including a control circuit, a driving circuit and a display screen driving circuit, wherein the control end of the control circuit is connected to the input end of the driving circuit, the driving circuit is connected to the device to be inflated, and the driving end of the control circuit is connected to the input end of the display screen driving circuit.

[0019] The present invention also provides an inflation method, comprising the following steps: S1: receiving a start-up circuit through a switch component; S2: collecting the digital signal pressure generated by the rotation of the rotary encoder and controlling the display screen to display the set inflation pressure value; S3: detecting whether the charging power supply is an external power supply or a built-in battery, and starting the drive component; S4: implementing the reception of the air pressure signal and controlling the display screen to display the real-time pressure value according to the air pressure signal; S5: when it is determined that the real-time displayed pressure value is equal to the set inflation pressure value, stopping the drive component.

[0020] The present invention further provides an inflation method, comprising the following steps: T1: receiving a start circuit through a switch component; T2: detecting whether the charging power supply is an external power supply or a built-in battery, and starting the drive component; T3: receiving an air pressure signal in real time and controlling the display screen to display the pressure value in real time according to the air pressure signal; T4: stopping the drive component according to the real-time displayed pressure value.

[0021] The beneficial effects of the present invention are: providing a pressure gauge assembly, an air pump, a circuit and an air pumping method, introducing a rotary encoder into the air pump, and cleverly combining the rotary encoder with the display screen, so that the pressure gauge assembly is small in size, easy to operate, and portable; and low in cost.

[0022] Furthermore, when the pressure gauge assembly is used in an air pump, the pressure gauge assembly is arranged in the thickness direction of the air pump, so the area on the front of the air pump where no internal components are arranged can be hollowed out, saving volume and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a pressure gauge assembly in an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of another pressure gauge assembly in an embodiment of the present invention.

[0025] Figure 3 It is a structural schematic diagram of an air pump in an embodiment of the present invention.

[0026] Figure 4 This is a circuit diagram of an air pump according to an embodiment of the present invention.

[0027] Figure 5 Schematic diagram of an inflation method in an embodiment of the present invention.

[0028] Figure 6 Schematic diagram of another inflation method in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit connection.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0033] like Figure 1 As shown, the present invention provides a pressure gauge assembly, including: a display screen, a pressure sensor, a control mainboard and a rotary encoder;

[0034] Display screen, used to receive control from the control mainboard and display the pressure value;

[0035] The pressure sensor is used to detect the air pressure and transmit the detected air pressure signal to the control main board;

[0036] The control mainboard is used to receive the air pressure signal and control the display screen to display the pressure value according to the air pressure signal; or, collect the digital signal pressure generated by the rotation of the rotary encoder and control the display screen to display the pressure value;

[0037] The rotary encoder is electrically connected to the control main board.

[0038] The existing technology uses a push button to set the voltage value, and the push button needs to be set separately from the screen, usually on the front of the air pump, which increases the size of the air pump. The present invention pioneered the introduction of a rotary encoder into the air pump, cleverly combining the rotary encoder with the display screen, reducing the problem of the large size of the air pump caused by the encoder.

[0039] Furthermore, when the rotary encoder is used in the air pump, the rotary encoder is set in the thickness direction of the air pump, so the areas on the front of the air pump where no internal components are set can be hollowed out, saving volume and cost.

[0040] A rotary encoder is a device used to measure rotational speed and can achieve rapid speed regulation in conjunction with PWM technology. A photoelectric rotary encoder can convert mechanical quantities such as the angular displacement and angular velocity of the output shaft into corresponding electrical pulses as digital outputs (REP) through photoelectric conversion. In one embodiment of the present invention, a hollow rotary shaft encoder is used. Preferably, an absolute encoder is used. There are many lines on the optical code disk, and each line is arranged in 2 lines, 4 lines, 8 lines, and 16 lines in sequence. In this way, at each position of the encoder, by reading the light and dark of each line, a unique binary code (Gray code) from 2 to the power of 0 to 2 to the power of n-1 is obtained. This is called an n-bit absolute encoder.

[0041] In another embodiment of the present invention, the rotary encoder generates digital signals with different pressures at different rotational speeds. Using a grating rotary encoder, the air pressure can be quickly set by adjusting the rotation rate. For example, if the desired pressure setting is 5, the encoder can be rotated slowly. If the desired pressure setting is 500, the encoder can be rotated quickly to quickly reach the desired pressure.

[0042] In one embodiment of the present invention, the display screen is an LCD display screen, and the control mainboard is a printed circuit board. Printed circuit boards (PCBs), also known as printed circuit boards, provide electrical connections for electronic components.

[0043] like Figure 2As shown, the pressure gauge assembly includes a gauge case 24 and a gauge base 16, which are fixedly connected. Between the gauge case 24 and the gauge base 16, there are, in order, a PCB mounting plate 23, an LCD display 22, a backlight panel 21, conductive strips 20, a PCB board 19, and a rotating support frame 18. The rotating support frame 18 passes through the gauge base 16 and connects to a rotary switch 15, which is fixedly connected to the gauge base 16. The outer ring of the rotary switch 15 can rotate 360° and transmit signals. The gauge case 24 and the gauge base 16 are fixedly connected by a barbed hook. The barbed hook secures the rotary switch 15 to the gauge base 16, allowing rotation of the gauge case 24 to adjust the rotary switch 15 and output a digital signal. The rotary switch 15 is soldered to the PCB 14.

[0044] like Figure 3 As shown, the present invention also provides an air inflator, comprising:

[0045] The shell includes a first half shell 29 and a second half shell 37. The first half shell 29 and the second half shell 37 are fastened together by screws 38 to form an installation cavity. Before installation, it is a "mouth" shape, and the place in the middle where there is no installation component is empty.

[0046] The pressure gauge assembly as described above is arranged in the installation cavity with the display screen facing outward; it can be understood that the pressure gauge assembly is arranged in the thickness direction of the air pump and does not need to occupy the front area of the air pump.

[0047] The drive assembly includes a drive motor 7 and a cylinder 8 arranged in the installation cavity. The central axis of the drive motor 7 is perpendicular to the central axis of the cylinder 8, and the central axis of the cylinder 8 is parallel to the central axis of the pressure gauge assembly; that is, the drive assembly is arranged vertically to reduce the volume and make full use of the space of the installation cavity.

[0048] The control component is arranged in the installation cavity and located below the pressure gauge component, and is used to identify the inflation mode and the charging mode, and control the drive component and the pressure gauge component; in a specific embodiment, the control component includes a PCB board 11.

[0049] The switch assembly is connected to the control assembly and is used to start the air pump. The switch assembly includes a switch cover 30, a torsion spring 31 and a switch 32. The switch assembly is arranged in a hollow area of the housing to further save space. In one embodiment of the present invention, the switch assembly is welded to the power board 11, and the switch cover 30 and the torsion spring 31 are loaded on the housing. The function of the switch cover 30 is to protect the switch 32 so that the switch 32 does not need to be directly exposed to the outside. At the same time, the user can trigger the switch 32 by pressing the switch cover 30; the function of the torsion spring 31 is to keep the switch cover 30 in the same position at all times when it is not pressed due to its elasticity.

[0050] In one embodiment of the present invention, a detachable power supply assembly is further included, and the power supply assembly is arranged at the bottom of the shell and electrically connected to the shell; or, an electrical connection hole is included for connecting to an external power supply. It is ensured that the air pump can be powered by both the mains and the plug-in. It is understandable that in order to facilitate plug-in power supply, the battery needs to be removed when plug-in power supply is adopted. The power supply assembly includes an EC5 connector 25, a battery terminal 26, a negative spring 27 and a positive spring 28. The EC5 connector 25, the negative spring 27 and the positive spring 28 are connected to the power board 11 through wiring, and the negative spring 27 and the positive spring 28 are connected to the battery terminal 26. The EC5 connector 25 is connected to the power cord 39, and the power cord 39 is connected to the car and other equipment through the cigar head 40. The interior of the air pump is connected through the internal wiring 12 and the wire 13.

[0051] In another embodiment of the present invention, a cooling fan is provided under the cylinder of the driving assembly, and the housing is provided with ventilation holes for the cooling fan to dissipate heat, so as to facilitate the discharge of heat generated during the operation of the pump and avoid overheating of the pump.

[0052] In one embodiment of the present invention, the housing is made of plastic.

[0053] In another embodiment of the present invention, the pressure gauge assembly is fixed on the PCB board 14; the PCB board 14 is provided with a wire hole for introducing the wires of the control assembly into the pressure gauge assembly.

[0054] It is understandable that the air pump of the present invention further includes a component connected to the air nozzle.

[0055] like Figure 4 As shown, the present invention also provides a circuit, including a control circuit, a driving circuit and a display screen driving circuit, wherein the control end of the control circuit is connected to the input end of the driving circuit, the driving circuit is connected to the device to be inflated, and the driving end of the control circuit is connected to the input end of the display screen driving circuit. It can be understood that Figure 4 It is merely an example, and the circuit elements in the figure can be replaced within the scope of the prior art. What the present invention intends to protect is the combination of various circuit elements to support the use of the inflator of the present invention.

[0056] like Figure 5 As shown, the present invention provides an air pumping method, comprising the following steps:

[0057] S1: Receives and starts the circuit through the switch component;

[0058] S2: Collect the digital signal pressure generated by the rotation of the rotary encoder and control the display screen to display the set inflation pressure value;

[0059] S3: Detect whether the charging power source is an external power source or a built-in battery, and start the driving component;

[0060] S4: receiving an air pressure signal and controlling the display screen to display a pressure value in real time according to the air pressure signal;

[0061] S5: When it is determined that the value of the real-time displayed pressure is equal to the set inflation pressure value, the driving component is stopped.

[0062] It can be understood that the above method is applicable to the case where the air pressure is pre-set and the air pump of the present invention is used for inflating.

[0063] like Figure 6 As shown, the present invention also provides an air pumping method, comprising the following steps:

[0064] T1: Receives and starts the circuit through the switch component;

[0065] T2: Detect whether the charging power source is an external power source or a built-in battery, and start the drive component;

[0066] T3: receiving the air pressure signal in real time and controlling the display screen to display the pressure value in real time according to the air pressure signal;

[0067] T4: Stop the driving component according to the value of the real-time displayed pressure.

[0068] It can be understood that the above method is applicable to the case of direct inflation using the air pump of the present invention.

[0069] For the two aforementioned inflation methods, the LCD display is used to display pressure data in both automatic and manual modes. In automatic mode, the user can pre-set a certain value, and the pump stops driving the assembly when the real-time pressure value reaches the pre-set value. The case drives the encoder to rotate to the angular position corresponding to the pressure value. By using the pre-set pressure relationship corresponding to the encoder rotation angle position, a digital pressure signal can be collected without using a pressure sensor and displayed on the digital pressure gauge display. When the pump starts working and reaches the pre-set pressure value, the control circuit immediately controls the drive assembly to stop working. It is understood that the diameter of the pressure gauge is less than or equal to the thickness of the case.

[0070] In manual mode, the user can keep pressing the switch, and the LCD screen will show the real-time pressure until the user is satisfied; the real-time air pressure is displayed during punching, and the set air pressure is displayed when the punch is in place.

[0071] In one embodiment of the present invention, the magnetoelectric encoder includes a sensing magnet, an encoder chip, and an MCU circuit. The sensing magnet, encoder chip, and MCU circuit are connected in sequence from front to back. The sensing magnet is connected to the rear pointer through the pointer shaft. The encoder chip is located on the MCU circuit, and the MCU circuit is integrated on the circuit board.

[0072] In one embodiment of the present invention, when the air pump of the present invention is started, it is in manual mode, and the rotary encoder enters automatic mode to achieve automatic switching. Specifically, on the case, the automatic to manual mode is turned to 0 and then turned one grid.

[0073] The present invention provides a rotary pressure gauge assembly and an air pump, which are combined with an encoder through a rotatable case. By setting a structural design inside the case, the case is made rotatable after being combined with the pressure gauge, and the case can be controlled to rotate back and forth within 360 degrees. When the whole is used and combined with a device such as an air pump, a small and easy-to-operate pressure gauge assembly can be provided to observe the working pressure of the air pump, which is convenient for users to use.

[0074] It is understandable that when the structure of the present invention is used in other components of a rotary pressure gauge, it should also fall within the scope of protection of the present invention.

[0075] The user pulls the trigger to turn on the charger power and enter manual mode. The pump reads and displays the pressure. The user pulls the trigger to check whether the switch is in the on position. If so, the LCD display shows the actual pressure. For manual mode, the starting pressure is 0PSI. The switch is triggered for more than 15 seconds or the pump is idle for more than one minute. If so, the power is turned off.

[0076] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0077] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0078] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0079] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. Those skilled in the art will recognize that, without departing from the scope of the present invention, several equivalent substitutions or obvious variations can be made, and the performance or use of the same should be considered to fall within the scope of protection of the present invention.

Claims

1. A pressure gauge assembly, characterized in that: include: Display screen, pressure sensor, control board, rotatable case, table base and rotary encoder; The display screen is used to receive control from the control mainboard and display the pressure value; The pressure sensor is used to detect air pressure and transmit the detected air pressure signal to the control mainboard; The control mainboard is used to receive the air pressure signal and control the display screen to display the pressure value in real time according to the air pressure signal; or to collect the digital signal pressure generated by the rotation of the rotary encoder and control the display screen to display the set inflation pressure value; The rotary encoder includes a rotary switch, and the rotary switch is electrically connected to the control main board; The control main board includes a PCB board, and the watch case is fixedly connected to the watch base; the accommodating space between the watch case and the watch base includes a PCB board fixing plate, a display screen, a backlight panel, a conductive strip, the PCB board, and a rotating support frame in sequence from the watch case to the watch base; the rotating support frame passes through the watch base in the axial direction and is connected to a rotary switch, and the rotary switch is fixedly connected to the watch base. The outer ring of the rotary switch rotates 360° and transmits signals. After being combined with the pressure gauge assembly, the watch case forms a rotatable state, and the watch case is controlled to rotate back and forth within 360 degrees. When the watch case is rotated, the rotary switch can be adjusted to output a digital signal.

2. The pressure gauge assembly according to claim 1, wherein The display screen is an LCD display screen.

3. The pressure gauge assembly according to claim 1, wherein: The watch case and the watch base are fixedly connected via an inverted hook; the watch base and the rotary switch are fixedly connected via an inverted hook.

4. The pressure gauge assembly according to any one of claims 1 to 3, characterized in that: The digital signal pressure generated by the rotary encoder is different due to different rotation speeds.

5. An air pump, characterized in that: include: The housing comprises a first half shell and a second half shell, wherein the first half shell and the second half shell are buckled together to form a mounting cavity. The pressure gauge assembly according to any one of claims 1 to 4, arranged in the mounting cavity with the display screen facing outward; a drive assembly comprising a drive motor and a cylinder disposed in the mounting cavity, wherein a central axis of the drive motor is perpendicular to a central axis of the cylinder and the central axis of the cylinder is parallel to a central axis of the pressure gauge assembly; a control assembly, disposed in the mounting cavity and below the pressure gauge assembly, for identifying an inflation mode and a charging mode, and controlling the drive assembly and the pressure gauge assembly; The switch assembly is connected to the control assembly and is used to start the air pump.

6. The air pump according to claim 5, characterized in that The pressure gauge assembly is fixed on a printed circuit board; a wire hole is provided on the printed circuit board for introducing the wires of the control assembly into the pressure gauge assembly.

7. The air pump according to claim 5, characterized in that Also included is a detachable power supply assembly, which is disposed at the bottom of the housing and electrically connected to the housing; Or, include an electrical connection hole for connecting to an external power source.

8. The air pump according to claim 5, wherein: A cooling fan is provided below the cylinder of the driving assembly, and the housing is provided with ventilation holes for the cooling fan to dissipate heat.

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