Capacitance key structure of metal float flowmeter

Abstract

The utility model relates to the technical field of flowmeter control buttons, and discloses a metal float flowmeter capacitance button structure, which comprises an installation plugboard, a plurality of button areas, a button switch, a button switch, a button switch, a button switch, a button switch, a button switch, a button switch, a button switch and a button switch, and the button area is provided with a plurality of button areas; the capacitor circuit board is used for being electrically connected with the touch sensing metal sheet; one end of each guide column is fixedly mounted on the mounting insertion plate, and the other end of each guide column is inserted into the capacitor circuit board; the protective cover and the converter are attached to the upper surface of the installation insertion plate after being installed in a spiral mode. The application can meet the requirement of safe use in a dangerous industrial environment.

Description

Technical Field

[0001] This application relates to the technical field of flow meter control buttons, and in particular to a capacitive button structure for a metal float flow meter. Background Technology

[0002] Metal tube float flow meters are suitable for measuring the flow rate of liquids, gases, and steam in closed pipelines. For many years, metal tube float flow meters have been widely used in measurement and automation systems in industries such as petrochemicals, chemicals, fertilizers, metallurgy, power, food, pharmaceuticals, and papermaking, due to their advanced technology, comprehensive functions, stable performance, and reliable safety.

[0003] The flow rate of the metal tube float uses a traditional ordinary control button, which does not have explosion-proof and flameproof performance. It requires opening the cover for operation. The opening process is prone to generating sparks when there is a collision or rotation, which poses a great safety hazard in industrial environments (such as the methane environment in underground coal mines). Utility Model Content

[0004] To meet explosion-proof requirements, this application provides a capacitive button structure for a metal float flowmeter.

[0005] This application provides a capacitive button structure for a metal float flowmeter, employing the following technical solution:

[0006] A capacitive button structure for a metal float flowmeter includes:

[0007] The mounting plate has multiple button areas, and each button area is embedded with a touch-sensitive metal sheet.

[0008] A capacitor circuit board is used for electrical connection with the touch-sensing metal sheet;

[0009] Multiple guide posts, one end of which is fixedly mounted on the mounting plate, and the other end of which is inserted into the capacitor circuit board;

[0010] The protective cover and the converter are screwed together and fit against the upper surface of the mounting plate.

[0011] By adopting the above technical solution, the button function is realized through a touch-sensitive metal sheet, eliminating the need for traditional mechanical button structures and avoiding sparks generated during opening the cover. This meets the safety requirements for use in hazardous industrial environments (such as methane environments in underground coal mines). The guide post serves for positioning and support, ensuring the relative position stability of the mounting plate and the capacitor circuit board, and guaranteeing a reliable electrical connection between the touch-sensitive metal sheet and the capacitor circuit board. The protective cover and converter are screw-mounted and fit snugly against the upper surface of the mounting plate, further enhancing protection and preventing external factors from interfering with the normal operation of the button structure.

[0012] Optionally, an elastic support is installed between the capacitor circuit board and the mounting plate.

[0013] By adopting the above technical solution, the elastic support provides a certain amount of buffering and elastic support. When subjected to external pressure or vibration, it can absorb some energy, reduce the impact on the electrical connection of the capacitor circuit board and the touch-sensitive metal sheet, and ensure the stability and reliability of button operation. In daily use, the elastic support can also drive the mounting plate to fit tightly against the protective cover.

[0014] Optionally, the elastic support member is a compression spring.

[0015] By adopting the above technical solution, the compression spring, a common elastic element, possesses excellent elasticity and restoring properties, providing stable support force. Its simple structure, low cost, and ease of installation and replacement reduce production costs and maintenance difficulty while ensuring elastic support functionality.

[0016] Optionally, the compression spring is sleeved on the guide post.

[0017] By adopting the above technical solution, the compression spring is sleeved on the guide post, which can be used to position and guide the compression spring, preventing it from shifting under force and ensuring its effective elastic support. At the same time, this structure makes the overall button structure more compact and easier to install.

[0018] Optionally, a pad is connected to one end of the guide post that passes through the capacitor circuit board.

[0019] By adopting the above technical solution, the pad prevents the guide post from directly detaching from the capacitor circuit board, further improving the overall structural stability of the button.

[0020] Optionally, the pad can be detachably installed on the guide post.

[0021] 1. By adopting the above technical solution, during the installation and debugging phase of the button structure, the detachable mounting pads make it easier for installers to install the capacitor circuit board onto the guide post and adjust the position and state of the pads to ensure that the relative position and connection state between the capacitor circuit board and the mounting plate meet the design requirements.

[0022] Optionally, the capacitor circuit board is provided with recesses and protrusions for connection with other components.

[0023] By adopting the above technical solution, the design of the recessed and protruding parts facilitates the connection and fixation of the capacitor circuit board with other components, improving the integration of the button structure with other components and the overall stability. This structural design allows for more flexible installation methods to meet the needs of different application scenarios.

[0024] Optionally, the surface of the mounting plate with the button area is covered with a mask.

[0025] By adopting the above technical solution, the mask can protect the touch-sensitive metal sheet on the mounting plate, preventing dust, moisture, and other contaminants from entering the button area and affecting the performance of the touch-sensitive metal sheet. At the same time, the mask also serves an identification and aesthetic purpose, making it easier for users to identify button functions and improving the ease of operation and user experience of the button structure.

[0026] In summary, this application includes at least one of the following beneficial effects:

[0027] 1. The button function is realized by using a touch-sensitive metal sheet, eliminating the need for traditional mechanical button structure, avoiding sparks generated during opening operation, and effectively meeting the safety requirements of use in hazardous industrial environments;

[0028] 2. The guide post serves to position and support, ensuring the relative position of the mounting plate and the capacitor circuit board is stable, and making the electrical connection between the touch-sensitive metal piece and the capacitor circuit board reliable. The elastic support (such as a compression spring) provides buffering and elastic support force, absorbing external pressure or vibration energy and reducing the impact on the electrical connection between the capacitor circuit board and the touch-sensitive metal piece. The pad prevents the guide post from directly detaching from the capacitor circuit board, further improving the overall stability of the button structure and jointly ensuring the stable operation of the button structure in complex industrial environments. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the mounting plate and capacitor circuit board applied to the converter according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the overall structure of the capacitive button structure according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram illustrating the structure of the pad block in an embodiment of this application;

[0032] Figure 4 This is a cross-sectional view of an embodiment of the present application showing the mounting plate attached to the protective cover;

[0033] Figure 5 This is a schematic diagram illustrating the structure of the capacitor circuit board after it has been snapped together and installed, according to an embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 10, mounting plate; 20, capacitor circuit board; 21, recessed part; 22, protruding part; 30, button area; 40, guide post; 41, pad; 50, supporting elastic element; 60, protective cover; 61, spiral mounting part; 62, transparent display part; 70, face film. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail.

[0036] This application discloses a capacitive button structure for a metal float flowmeter.

[0037] Reference Figure 1 A capacitive button structure for a metal float flowmeter includes a mounting plate 10, a capacitive circuit board 20, a capacitive trigger sensor, and a control chip. The mounting plate 10 has multiple independent button areas 30, each embedded in a touch-sensitive metal sheet. The capacitive circuit board 20 is electrically connected to the multiple touch-sensitive metal sheets. The working principle is based on capacitive sensing technology. Each button area 30 forms a capacitance with ground. When no human body is near the button, the capacitance is a very small and relatively fixed value. However, when a user's finger approaches the button, the electric field between the finger and the button changes due to the conductivity of the human body, increasing the total capacitance. This capacitance change is detected by the capacitive trigger sensor and converted into an electrical signal, which is sent to the control chip. The control chip processes these signals using an algorithm. The circuit connection principle of capacitive sensing technology is existing technology and will not be elaborated upon in this application.

[0038] This application mainly focuses on designing a specific capacitive button structure based on the converter structure of a metal float flowmeter to implement capacitive sensing technology.

[0039] Reference Figure 2 and Figure 3 Multiple guide posts 40 are mounted on the mounting plate 10. Three guide posts 40 are arranged at three points on the mounting plate 10. One end of each guide post 40 is welded to the mounting plate 10, and the other end is inserted into the capacitor circuit board 20. A pad 41 is detachably connected to the lower end of each guide post 40 to prevent it from leaving the capacitor circuit board 20. The pad 41 is inserted into or threaded to the guide post 40. The mounting plate 10 is mounted on the capacitor circuit board 20 by sliding up and down via the guide posts 40.

[0040] The capacitive button structure also includes a protective cover 60, which includes a spiral mounting part 61 and a transparent display part 62. The transparent display part 62 is made of tempered glass. The protective cover 60 is spirally mounted on the converter, so that the entire capacitive button structure is installed inside the converter. When the protective cover 60 is rotated and mounted on the converter, it exerts a certain squeezing force on the mounting plate 10 when it is close to it. The guide post 40 allows the mounting plate 10 to be adaptively adjusted along the axial direction of the guide post 40 when it is squeezed by the protective cover 60. However, the mounting plate 10 does not shift in the horizontal direction during the installation of the protective cover 60.

[0041] Furthermore, refer to Figure 3 and Figure 4 After the protective cover 60 is installed, the smaller the gap between the button area 30 of the mounting plate 10 and the protective cover 60, the greater the capacitance change when a human touches the tempered glass, and the more sensitive and reliable the buttons will be. Specifically, an elastic support component, specifically a compression spring, is installed between the mounting plate 10 and the capacitor circuit board 20. The compression spring is directly sleeved on the guide post 40, so that one end of the compression spring stably presses against the mounting plate 10, and the other end of the compression spring stably presses against the capacitor circuit board 20. The elastic force of the compression spring drives the button area 30 of the mounting plate 10 to stably press against the protective cover 60.

[0042] Reference Figure 2 The mounting plate 10 is covered with a film 70, which protects the touch-sensitive metal sheet of the button area 30. When the protective cover 60 is rotated to close tightly, the compression spring drives the film 70 and the protective cover 60 to maintain a close fit, thereby ensuring the reliability and sensitivity of the capacitive buttons.

[0043] Reference Figure 2 and Figure 5 When assembling the capacitive button structure, in order to enable the capacitive button structure to be quickly installed with other components of the converter, the capacitor circuit board 20 is provided with a recess 21 and a protrusion 22 for engaging with other parts. The recess 21 and the protrusion 22 engage with other circuit boards, making it convenient for people to quickly assemble the capacitive button structure.

[0044] The implementation principle of the capacitive button structure for a metal float flowmeter in this application is as follows:

[0045] By setting a button area 30 with an embedded touch-sensitive metal sheet in the mounting plate 10, and utilizing capacitive sensing technology, when a human finger approaches the button area 30, the capacitance value changes. The capacitive trigger sensor detects the capacitance change and converts it into an electrical signal, which is then sent to the control chip to realize the button function. This avoids the sparks generated by traditional mechanical button opening operations and meets the safety requirements for use in hazardous industrial environments. The guide post 40 positions and supports the mounting plate 10 and the capacitor circuit board 20, ensuring their relative position is stable and the touch-sensitive metal sheet is reliably electrically connected to the capacitor circuit board 20. A compression spring sleeved on the guide post 40 is installed between the capacitor circuit board 20 and the mounting plate 10 as an elastic support to provide cushioning. The mounting plate 10 is supported by elastic force, absorbing external pressure or vibration energy, reducing the impact on electrical connections, and simultaneously driving the mounting plate 10 to fit tightly against the protective cover 60. One end of the guide post 40 passing through the capacitor circuit board 20 is connected to a removable pad 41 to prevent the guide post 40 from directly detaching from the capacitor circuit board 20, further improving the overall stability of the button structure. The capacitor circuit board 20 is provided with a recessed part 21 and a protruding part 22, which facilitates connection and fixation with other parts, improving the integration of the button structure with other components and the overall stability. The surface of the mounting plate 10 is covered with a film 70, which protects the touch-sensitive metal sheet and serves as an identifier and aesthetic feature, making it easy for users to identify button functions and improving operational convenience and user experience.

[0046] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A capacitive button structure for a metal float flowmeter, characterized in that, include: The mounting plate (10) is provided with multiple button areas (30), and the button areas (30) are embedded with touch-sensitive metal sheets; Capacitor circuit board (20) is used for electrical connection with the touch-sensitive metal sheet; Multiple guide posts (40), one end of each guide post (40) is fixedly mounted on the mounting plate (10), and the other end of each guide post (40) is inserted into the capacitor circuit board (20); The protective cover (60) and the converter are screwed together and fit against the upper surface of the mounting plate (10).

2. The capacitive button structure of a metal float flowmeter according to claim 1, characterized in that, An elastic support is installed between the capacitor circuit board (20) and the mounting plate (10).

3. The capacitive button structure for a metal float flowmeter according to claim 2, characterized in that, The elastic support is a compression spring.

4. The capacitive button structure for a metal float flowmeter according to claim 3, characterized in that, The compression spring is sleeved on the guide post (40).

5. The capacitive button structure of a metal float flowmeter according to claim 1, characterized in that, The guide post (40) is connected to a pad (41) at its lower end.

6. The capacitive button structure of a metal float flowmeter according to claim 5, characterized in that, The pad (41) is detachably installed on the guide post (40).

7. The capacitive button structure of a metal float flowmeter according to claim 1, characterized in that, The capacitor circuit board (20) is provided with a recess (21) and a protrusion (22) for connection with other components.

8. The capacitive button structure of a metal float flowmeter according to claim 1, characterized in that, The surface of the mounting plate (10) with the button area (30) is covered with a mask (70).

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