Digital display pressure gauge

Abstract

The utility model discloses a digital display pressure gauge, which comprises a shell, a base, a circuit board, a pressure sensor, a power supply and a display screen, a pressure sensor is arranged in a mounting cavity and communicates with the output end of an air inlet channel, and the pressure sensor is used for sensing the air pressure in the air inlet channel; the display screen is arranged in the installation cavity in cooperation with the display screen and connected with the circuit board, the display screen is exposed out of the shell and is observed by a user, the air pressure in the air inlet channel is monitored in real time through the pressure sensor in the using process, the detected pressure value is displayed through the display screen, and the user can directly read the pressure value conveniently; careful observation of the display panel is not needed, and the use process is more convenient; meanwhile, electronic data sampling is accurate, and regular calibration is not needed; and compared with a precise micro component such as a pointer, the electronic component is more resistant to vibration and can be used in a strong vibration environment, and the use limitation is smaller.

Description

TECHNICAL FIELD

[0001] The utility model relates to the pressure gauge field technology especially is digital display pressure gauge. BACKGROUND

[0002] In the existing manual pressing inflation device class, the common inflation cylinder or inflation pump etc. is often used, and the output pressure value is often displayed by a mechanical pointer rotating pressure gauge, so that the user can understand the change of the output pressure at any time. Because the mechanical parts are easy to produce metal fatigue after long-term rotation, the mechanical pointer rotating pressure gauge needs to be checked regularly to ensure the accuracy of the pressure value. When watching the output pressure value, the specific position of the pointer on the dial needs to be carefully checked, which makes the use process more troublesome. Moreover, the mechanical rotating pointer is a precise and small part, which needs a relatively stable fixed environment to ensure the accuracy of the pressure output. It is also easy to cause damage to the related parts of the pointer due to strong vibration, resulting in large use limitation. Therefore, it is necessary to further improve the structure of the existing pressure gauge. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model mainly aims at the defects of the prior art, and provides a digital display pressure gauge, which can effectively solve the problems of the mechanical pointer rotating pressure gauge, such as the need for regular checking, the troublesome observation of pressure process and the large use limitation.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A digital display pressure gauge, comprising a shell, a base, a circuit board, a pressure sensor, a power supply and a display screen, the shell has an open installation cavity, the base is arranged on the shell and covers the opening of the installation cavity, and an air inlet communicating with the outside is formed in the base, the circuit board is arranged in the installation cavity, the pressure sensor is arranged in the installation cavity and communicates with the output end of the air inlet, and the pressure sensor is used for sensing the air pressure in the air inlet, the pressure sensor is connected with the circuit board, the power supply is arranged in the installation cavity and connected with the circuit board, the display screen is arranged in the installation cavity and connected with the circuit board, and the display screen is exposed to the outside of the shell and used for observation by the user.

[0006] As a preferred scheme, a first fixing hole is recessed in the circumferential wall of the opening of the installation cavity, a second fixing hole matched with the first fixing hole is formed in the base, and a fixing screw passes through the second fixing hole and the first fixing hole in sequence to fix the base and the shell together.

[0007] As a preferred scheme, the pressure sensor communicates with the output end of the air inlet through a connecting pipe, and the connecting pipe is a colloid hose.

[0008] As a preferred scheme, the air inlet channel comprises an air inlet communicating with the outside, an observation port communicating with the outside, and an air outlet communicating with the connecting pipe; the connecting pipe has a first connecting end and a second connecting end at two ends thereof respectively, the first connecting end communicates with the air outlet, and the pressure sensor is arranged in the second connecting end and in conduction with the inside of the connecting pipe.

[0009] As a preferred scheme, the observation port is sealed by an observation port screw.

[0010] As a preferred scheme, the pressure sensor and the power supply are fixed on the circuit board.

[0011] As a preferred scheme, a power switch is further arranged on the circuit board and electrically connected with the power supply.

[0012] As a preferred scheme, the circuit board is provided with a charging port, and the charging port is exposed to the side wall of the shell.

[0013] As a preferred scheme, the shell is provided with an observation window communicating with the mounting cavity at the upper end face, and the display screen is exposed to the shell through the observation window.

[0014] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically speaking, the above technical scheme can know that:

[0015] The pressure sensor is arranged in the mounting cavity and communicates with the output end of the air inlet channel, and the pressure sensor is used for sensing the air pressure in the air inlet channel; and the display screen is arranged in the mounting cavity and connected with the circuit board, the display screen is exposed to the shell and observed by the user, so that the size of the air pressure in the air inlet channel is monitored in real time by the pressure sensor in the use process, and the detected pressure value is displayed through the display screen, the user can directly read out the pressure value, careful observation of the display disc is not needed, and the use process is more convenient; meanwhile, electronic data sampling is accurate, and periodical calibration is not needed; and compared with the precise and small pointer, the electronic component is more resistant to vibration, can be used in a strong vibration environment, and has smaller use limitation.

[0016] In order to more clearly set forth the structural features and effects of the utility model, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a three-dimensional structure schematic diagram of a preferred embodiment of the utility model;

[0018] Fig. 2 is an exploded state schematic diagram of a preferred embodiment of the utility model;

[0019] Fig. 3is the cross section schematic view of the base of the preferable embodiment of the utility model;

[0020] Fig. 4 is the three-dimensional structure schematic view of the shell of the preferable embodiment of the utility model.

[0021] The drawing mark explanation is as follows:

[0022] 1, shell;1-1, first fixed hole;1-2, installation cavity;1-3, observation window;2, base;2-1, air inlet;2-2, air inlet channel;2-3, air outlet;2-4, end portion;2-5, observation port;2-6, second fixed hole;3, display screen;4, power switch;5, pressure sensor;6, power supply;7, connecting pipe;7-1, second connecting end;7-2, first connecting end;8, fixed screw;10, circuit board;11, charging port. Specific implementation

[0023] Please refer to Figs. 1 to 4 The specific structure of the preferable embodiment of the utility model is shown, and it includes shell 1, base 2, circuit board 10, pressure sensor 5, power supply 6 and display screen 3.

[0024] The shell 1 has an open installation cavity 1-2;In the embodiment, the first fixed hole 1-1 is recessed in the open peripheral wall of the installation cavity 1-2;The observation window 1-3 that is communicated with the installation cavity 1-2 is arranged on the upper end face of the shell 1.

[0025] The base 2 is arranged on the shell 1 and covers the opening of the installation cavity 1-2, and the air inlet channel 2-2 that is communicated with the outside is arranged on the base 2, in working, the gas in the external air pump enters the inside through the air inlet channel 2-2;In the embodiment, the second fixed hole 2-6 that cooperates with the first fixed hole 1-1 is arranged on the base 2, and a fixed screw 8 is sequentially passed through the second fixed hole 2-6 and the first fixed hole 1-1 to fix the base 2 and the shell 1 together.

[0026] The circuit board 10 is arranged in the installation cavity 1-2;In the embodiment, the charging port 11 is arranged on the circuit board 10, and the charging port 11 is exposed to the side wall of the shell 1, and the charging port 11 is used to charge the power supply 6.

[0027] The pressure sensor 5 is installed in the mounting cavity 1-2 and connected to the output end of the air intake duct 2-2. The pressure sensor 5 is used to sense the air pressure in the air intake duct 2-2. The pressure sensor 5 is connected to the circuit board 10. In this embodiment, the pressure sensor 5 is connected to the output end of the air intake duct 2-2 through a connecting pipe 7. The connecting pipe 7 is a rubber hose. The rubber hose material of the connecting pipe 7 facilitates bending, effectively reducing the internal space occupied by the connecting pipe 7 and facilitating its installation. The air intake duct 2-2 includes an air inlet 2-1 connected to the outside, an observation port 2-5 connected to the outside, and an air outlet 2-3 connected to the connecting pipe 7. The air outlet 2-3 is provided with an end 2-4 that mates with the connecting pipe 7. The observation port 2-5 is sealed with an observation port 2-5 screw. The two ends of the connecting pipe 7 are a first connecting end 7-2 and a second connecting end 7-1, respectively. The first connecting end 7-2 is connected to the air outlet 2-3, and the pressure sensor 5 is installed in the second connecting end 7-1 and is connected to the inside of the connecting pipe 7.

[0028] The power supply 6 is disposed in the mounting cavity 1-2 and connected to the circuit board 10. In this embodiment, both the pressure sensor 5 and the power supply 6 are fixed on the circuit board 10. The pressure sensor 5 is fixedly mounted on the circuit board 10 by soldering and is electrically connected to the circuit board 10. The power supply 6 is fixedly mounted on the circuit board 10 by adhesive and is electrically connected to the circuit board 10. During installation, the power supply 6 and the pressure sensor 5 can be fixedly mounted on the circuit board 10 first, and then installed together into the mounting cavity 101, making the installation process more convenient. Furthermore, a power switch 4 is also included, which is disposed on the circuit board 10 and electrically connected to the power supply 6.

[0029] The display screen 3 is disposed in the mounting cavity 1-2 and connected to the circuit board 10. The display screen 3 protrudes outward from the housing 1 for user observation. In this embodiment, the display screen 3 protrudes outward from the housing 1 through the observation window 1-3. In other embodiments, the airtightness of the housing 1 can be increased by providing a protective shell of transparent material on the observation window 1-3.

[0030] The working principle of this embodiment is described in detail below:

[0031] During operation, the external gas enters through the air inlet 2-1, passes through the air inlet 2-2, and then enters the connecting pipe 7 through the air outlet 2-3. The gas then reaches the inside of the pressure sensor 5 through the connecting pipe 7. If the power switch 4 is closed at this time, the pressure sensor 5 will work and the circuit on the circuit board 10 will perform corresponding circuit calculations on the pressure changes generated inside the pressure sensor 5 to obtain the accurate value after verification. The pressure value will then be displayed on the display screen 3.

[0032] The key design features of this invention are: a pressure sensor is installed in the mounting cavity and connected to the output end of the air intake duct; the pressure sensor is used to sense the air pressure in the air intake duct; and a display screen is installed in the mounting cavity and connected to the circuit board, with the display screen protruding from the housing for user observation. This allows the pressure sensor to monitor the air pressure in the air intake duct in real time during use, and the detected pressure value is displayed on the screen, making it convenient for users to directly read the pressure value without needing to carefully observe the display dial, thus making the process more convenient. Furthermore, the electronic data sampling is accurate and does not require periodic calibration; and compared to precision micro-components like pointers, electronic components are more vibration-resistant and can be used in environments with strong vibrations, thus having fewer limitations in application.

[0033] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A digital display pressure gauge, characterized in that: The device includes a housing, a base, a circuit board, a pressure sensor, a power supply, and a display screen. The housing has a mounting cavity with an opening at one end. The base is mounted on the housing and covers the opening of the mounting cavity, and has an air intake duct communicating with the outside. The circuit board is located in the mounting cavity. The pressure sensor is located in the mounting cavity and communicates with the output end of the air intake duct. The pressure sensor is used to sense the air pressure in the air intake duct. The pressure sensor is connected to the circuit board. The power supply is located in the mounting cavity and is connected to the circuit board. The display screen is located in the mounting cavity and is connected to the circuit board. The display screen protrudes from the housing for user observation.

2. The digital display pressure gauge according to claim 1, characterized in that: The mounting cavity opening has a recessed first fixing hole in its peripheral sidewall, and the base has a second fixing hole that mates with the first fixing hole. A fixing screw passes through the second fixing hole and the first fixing hole in sequence to fix the base and the housing together.

3. The digital display pressure gauge according to claim 1, characterized in that: The pressure sensor is connected to the output end of the air intake through a connecting pipe, which is a gel hose.

4. The digital display pressure gauge according to claim 3, characterized in that: The air intake includes an air inlet communicating with the outside, an observation port communicating with the outside, and an air outlet communicating with a connecting pipe; the two ends of the connecting pipe are a first connecting end and a second connecting end, the first connecting end communicating with the air outlet, and the pressure sensor is disposed in the second connecting end and communicates with the inside of the connecting pipe.

5. The digital display pressure gauge according to claim 4, characterized in that: The observation port is sealed with an observation port screw.

6. The digital display pressure gauge according to claim 1, characterized in that: Both the pressure sensor and the power supply are fixed on the circuit board.

7. The digital display pressure gauge according to claim 1, characterized in that: It also includes a power switch, which is mounted on the circuit board and electrically connected to the power source.

8. The digital display pressure gauge according to claim 1, characterized in that: A charging port is provided on the circuit board, and the charging port protrudes outward from the side wall of the housing.

9. The digital display pressure gauge according to claim 1, characterized in that: The upper surface of the housing has an observation window that connects to the mounting cavity, and the display screen is exposed to the outside of the housing through the observation window.

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