Maximum bubble method surface tension meter control circuit board

Abstract

The utility model discloses a maximum bubble method surface tension meter control circuit board, which comprises a control circuit board body, the control circuit board body is detachably mounted in a host shell through a dismounting mechanism, the dismounting mechanism comprises a mounting hole, a limiting sleeve and a cylindrical tube, the mounting hole is arranged at the corner of the top of the control circuit board body, and the limiting sleeve is arranged in the cylindrical tube. A pressing ring is formed at the top of the limiting sleeve, the lower end of the limiting sleeve is slidably inserted into the mounting hole, the bottom of the cylindrical pipe is fixedly connected with the inner top of the host shell, a notch is formed in the bottom of the cylindrical pipe, a through groove is formed in the bottom of the cylindrical pipe, and a sliding block is slidably arranged at the upper end in the limiting sleeve. The bottom of the sliding block is fixedly connected with a movable rod, the lower end of the movable rod slidably penetrates through the bottom of the limiting sleeve and then is fixedly connected with a baffle, the side face of the baffle is fixedly connected with a clamping head, the clamping head can be screwed into the notch, the top of the clamping head abuts against the notch, and at the moment, the pressing ring can press the top of the control circuit board body.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a maximum bubble method surface tension meter control circuit board. Background Art

[0002] The maximum bubble method is an experimental method for determining the surface tension of a solution. Its basic principle is to use the properties of liquid surface tension to measure the surface tension of a liquid. This method calculates the surface tension by forming bubbles in a liquid and measuring the additional pressure required during the bubble formation process. Specifically, when bubbles are formed in a liquid, the surface tension of the bubble is proportional to the additional pressure and inversely proportional to the radius of curvature of the bubble. By measuring the additional pressure when the bubble is formed and the radius of curvature of the bubble, the surface tension of the liquid can be calculated.

[0003] For example, the liquid surface tension dynamic measurement experimental instrument and measurement method disclosed in the Chinese patent with announcement number CN102564907B include a measurement chamber, a gear track, a manual lifting gear, a ruler, a host, a temperature display window, a data acquisition USB port, a measurement control button, an air pump control button, a timing or pause switch, a reset switch, a timing display window, a bubble instantaneous pressure indicator, a heating pad, a measuring beaker, a thermometer, a gas flow adjustment knob, a gas flow meter, a first capillary, a second capillary and a heating pad power switch; a bubble instantaneous pressure indicator is provided on the left side of the panel of the host, and the panel of the host A timing display window and a temperature display window are arranged in sequence on the upper right side; a reset switch, a timing or pause switch, an air pump control button, a measurement control button, and a USB port for a data logger are arranged in sequence on the lower right side of the panel of the main unit; a heating pad and a gear track are arranged on the upper surface of the main unit; a heating pad power switch is arranged on the heating pad; a measuring beaker is arranged above the heating pad; a ruler and a manual lifting gear are arranged on the gear track; a measuring chamber is arranged on the manual lifting gear; a gas flowmeter and an air flow adjustment knob are arranged on the surface of the measuring chamber; a thermometer, a first capillary, and a second capillary are arranged at the lower end of the outer side of the measuring chamber, suspended above the measuring beaker.

[0004] However, the control circuit board in the existing host is generally fixed in the host housing by screws. When the screws are removed, they are prone to slippage. In addition, the removed screws will be separated from the control circuit board and easily lost, which is inconvenient for subsequent installation of the control circuit board.

[0005] Therefore, a control circuit board of a maximum bubble method surface tension meter is proposed. Utility Model Content

[0006] The utility model aims to provide a maximum bubble method surface tension meter control circuit board, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0007] To achieve the above object, the main technical solutions adopted by the present utility model include:

[0008] A control circuit board for a maximum bubble method surface tension meter, including a control circuit board body for the maximum bubble method surface tension meter, and the control circuit board body is detachably installed in the main housing of the maximum bubble method surface tension meter through a disassembly and assembly mechanism;

[0009] The disassembly and assembly mechanism includes a mounting hole, a limiting sleeve and a cylindrical tube. The mounting hole is opened at the top corner of the control circuit board body. A pressing ring is formed at the top of the limiting sleeve. The lower end of the limiting sleeve is slidably inserted into the mounting hole. The bottom of the cylindrical tube is fixedly connected to the inner top of the main housing. A notch is opened at the bottom of the cylindrical tube, and a through groove is opened at the bottom of the cylindrical tube. A slider is slidably arranged at the upper end inside the limiting sleeve. A movable rod is fixedly connected to the bottom of the slider. The lower end of the movable rod slidably penetrates the bottom of the limiting sleeve and then is fixedly connected to a baffle. A clamping head is fixedly connected to the side of the baffle. The clamping head can be screwed into the notch so that the top of the clamping head abuts against the notch. At this time, the pressing ring can press on the top of the control circuit board body.

[0010] In a control circuit board for a maximum bubble method surface tension meter according to the present utility model, wherein, there is a frictional contact between the top of the clamping head and the top of the notch.

[0011] In a control circuit board for a maximum bubble method surface tension meter according to the present utility model, wherein, a spring is sleeved on the movable rod. The bottom of the spring presses on the inner bottom of the limiting sleeve, and the upper end of the spring abuts against the bottom of the slider.

[0012] In a control circuit board for a maximum bubble method surface tension meter according to the present utility model, wherein, a card slot is opened at the bottom of the cylindrical tube. The card slot is communicated with the notch. The clamping head can move along the notch to the bottom of the card slot, and the clamping head can be clamped into the card slot under the elastic force of the spring.

[0013] In a control circuit board for a maximum bubble method surface tension meter according to the present utility model, wherein, an epoxy resin anti-oxidation coating is sprayed on the spring.

[0014] In a control circuit board for a maximum bubble method surface tension meter according to the present utility model, wherein, a groove is opened at the top of the slider.

[0015] In a control circuit board for a maximum bubble method surface tension meter according to the present utility model, wherein, four groups of the disassembly and assembly mechanisms are provided, and the four groups of the disassembly and assembly mechanisms are respectively arranged at the four corners of the control circuit board body.

[0016] In a surface tension meter control circuit board using the maximum bubble method according to the present utility model, an elastic sheet is fixedly connected to the inner bottom of the main body housing. The elastic sheet is located inside the cylindrical tube, and the elastic sheet can apply an upward elastic force to the bottom of the baffle.

[0017] In a surface tension meter control circuit board using the maximum bubble method according to the present utility model, the elastic sheet is arranged in an inverted V shape.

[0018] In a surface tension meter control circuit board using the maximum bubble method according to the present utility model, the length of the elastic sheet is less than the diameter of the baffle.

[0019] The present utility model at least has the following beneficial effects:

[0020] The disassembly and assembly mechanism provided by the present utility model can realize the rapid disassembly and assembly between the main body housing and the control circuit board body, and effectively prevent the limit sleeve and related components installed in the limit sleeve from falling off the control circuit board body, avoiding the phenomenon of loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0022] Figure 1 is one of the sectional structure schematic diagrams when the control circuit board body of the present utility model is connected to the main body housing;

[0023] Figure 2 is one of the partial structure schematic diagrams of the surface tension meter control circuit board using the maximum bubble method of the present utility model;

[0024] Figure 3 is the second sectional structure schematic diagram when the control circuit board body of the present utility model is connected to the main body housing;

[0025] Figure 4 is the structure schematic diagram of the cylindrical tube of the present utility model;

[0026] Figure 5 is the second partial structure schematic diagram of the present utility model;

[0027] Figure 6 is Figure 3 the enlarged structure schematic diagram of part A in

[0028] Explanation of the reference numerals in the drawings:

[0029] 1. Main body housing; 2. Control circuit board body; 3. Disassembly and assembly mechanism; 301. Limit sleeve; 302. Cylindrical tube; 3021. Through groove; 3022. Notch; 3023. Card slot; 303. Movable rod; 304. Spring; 305. Slide block; 3051. Groove; 306. Baffle; 307. Chuck; 308. Elastic sheet. Detailed implementation mode

[0030] The following will cooperate with the drawings and embodiments to elaborate on the implementation mode of the present application, so as to fully understand the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects and implement accordingly.

[0031] Embodiment 1

[0032] Please refer to Figures 1 to 6 As shown, this embodiment provides a control circuit board for the maximum bubble method surface tension meter. For the control circuit board body 2 of the maximum bubble method surface tension meter, the control circuit board body 2 is detachably installed in the main body housing 1 of the maximum bubble method surface tension meter through the disassembly and assembly mechanism 3;

[0033] The disassembly and assembly mechanism 3 includes a mounting hole, a limit sleeve 301 and a cylindrical tube 302. The mounting hole is opened at the top corner of the control circuit board body 2. A pressing ring 3011 is formed at the top of the limit sleeve 301. The lower end of the limit sleeve 301 is slidably inserted into the mounting hole. The bottom of the cylindrical tube 302 is fixedly connected to the inner top of the main body housing 1. A notch 3022 is opened at the bottom of the cylindrical tube 302. A through groove 3021 is opened at the bottom of the cylindrical tube 302. A slide block 305 is slidably arranged at the upper end inside the limit sleeve 301. A movable rod 303 is fixedly connected to the bottom of the slide block 305. The lower end of the movable rod 303 slidably penetrates the bottom of the limit sleeve 301 and is fixedly connected to a baffle 306. A chuck 307 is fixedly connected to the side of the baffle 306. In order to facilitate the rotation of the movable rod 303, a groove 3051 is opened at the top of the slide block 305. The chuck 307 can be screwed into the notch 3022 so that the top of the chuck 307 abuts against the notch 3022. In this embodiment, the top of the chuck 307 and the top of the notch 3022 are in frictional contact, thereby preventing the chuck 307 from easily sliding out of the notch 3022. At this time, the pressing ring 3011 can press on the top of the control circuit board body 2.

[0034] By adopting the above technical solution, during installation, align the chuck 307 with the through slot 3021, then insert the lower end of the limit sleeve 301 into the cylindrical tube 302. Then, insert a flat-tip screwdriver into the groove 3051 and rotate the flat-tip screwdriver to screw the chuck 307 into the notch 3022. When disassembling, just rotate the slider 305 in the reverse direction to rotate the chuck 307 from the notch 3022 to the bottom of the through slot 3021. At this time, the limit sleeve 301 can be pulled out from the cylindrical tube 302.

[0035] Specifically, a spring 304 is sleeved on the movable rod 303. The bottom of the spring 304 presses against the inner bottom of the limit sleeve 301, and the upper end of the spring 304 abuts against the bottom of the slider 305. Through this setting, the friction between the chuck 307 and the notch 3022 can be increased, thereby improving the stability during installation.

[0036] Embodiment 2

[0037] The difference between this embodiment and Embodiment 1 is that a card slot 3023 is opened at the bottom of the cylindrical tube 302. The card slot 3023 is communicated with the notch 3022. The chuck 307 can move along the notch 3022 to the bottom of the card slot 3023. The chuck 307 can be snapped into the card slot 3023 under the elastic force of the spring 304. In order to improve the service life of the spring 304, an epoxy resin anti-oxidation coating is sprayed on the spring 304. By adopting the above technical solution, the stability of the connection between the limit sleeve 301 and the cylindrical tube 302 can be further improved.

[0038] In this embodiment, four sets of disassembly and assembly mechanisms 3 are provided, and the four sets of disassembly and assembly mechanisms 3 are respectively arranged at the four corners of the control circuit board body 2.

[0039] In this embodiment, in order to further improve the stability when the limit sleeve 301 is connected to the cylindrical tube 302, an elastic piece 308 is fixedly connected to the inner bottom of the main body housing 1. The elastic piece 308 is located inside the cylindrical tube 302. The elastic piece 308 can apply an upward elastic force to the bottom of the baffle 306. The elastic piece 308 is arranged in an inverted V shape. In order to prevent the elastic piece 308 from blocking the chuck 307 when rotating the baffle 306, the length of the elastic piece 308 is less than the diameter of the baffle 306.

[0040] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0041] Working principle: During installation, align the chuck 307 with the through slot 3021, then insert the lower end of the limit sleeve 301 into the cylindrical tube 302. Then, insert a flat-tip screwdriver into the groove 3051, press down the slider 305, and then rotate the flat-tip screwdriver so that the chuck 307 moves along the notch 3022 to the bottom of the card slot 3023. At this time, both the elastic piece 308 and the spring 304 are in a compressed state. Then release the slider 305. At this time, the chuck 307 is snapped into the card slot 3023 under the elastic force of the elastic piece 308 and the spring 304;

[0042] During disassembly, insert a flat-tip screwdriver into the groove 3051, then press down the slider 305 to press the chuck 307 out of the card slot 3023. Then rotate the slider 305 in the reverse direction to move the chuck 307 along the notch 3022 to the bottom of the through slot 3021. At this time, lift the control circuit board body 2 upward to disassemble the host housing 1 and the control circuit board body 2.

[0043] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in the relevant field. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A maximum bubble method surface tension meter control circuit board, characterized in that: It comprises a control circuit board body (2) for a maximum bubble method surface tension meter, wherein the control circuit board body (2) is detachably mounted in a mainframe housing (1) of the maximum bubble method surface tension meter via a disassembly and assembly mechanism (3); The disassembly and assembly mechanism (3) comprises a mounting hole, a limiting sleeve (301) and a cylindrical tube (302); the mounting hole is provided at the top corner of the control circuit board body (2); the top of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is slidably plugged into the mounting hole; the bottom of the cylindrical tube (302) is fixedly connected to the inner top of the main housing (1); the bottom of the cylindrical tube (302) is provided with a notch (3022); the bottom of the cylindrical tube (302) is provided with a through groove (3021); the limiting sleeve (301 ... provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (301) is provided with a pressure ring (3011); the lower end of the limiting sleeve (3 A slider (305) is slidably provided at the inner upper end of the cylinder (301), and a movable rod (303) is fixedly connected to the bottom of the slider (305). The lower end of the movable rod (303) slides through the bottom of the limiting sleeve (301) and is fixedly connected to a baffle (306). A clamp (307) is fixedly connected to the side of the baffle (306). The clamp (307) can be screwed into the notch (3022) so that the top of the clamp (307) is against the notch (3022). At this time, the pressure ring (3011) can be pressed on the top of the control circuit board body (2).

2. A maximum bubble method surface tension meter control circuit board according to claim 1, characterized in that: There is friction contact between the top of the clamp (307) and the top of the notch (3022).

3. A maximum bubble method surface tension meter control circuit board according to claim 2, characterized in that: A spring (304) is sleeved on the movable rod (303), the bottom of the spring (304) is pressed against the inner bottom of the limiting sleeve (301), and the upper end of the spring (304) is against the bottom of the sliding block (305).

4. A maximum bubble method surface tension meter control circuit board according to claim 3, characterized in that: A slot (3023) is provided at the bottom of the cylindrical tube (302), and the slot (3023) is connected to the notch (3022). The clamping head (307) can move along the notch (3022) to the bottom of the slot (3023), and the clamping head (307) can be clamped into the slot (3023) under the elastic force of the spring (304).

5. A maximum bubble method surface tension meter control circuit board according to claim 3, characterized in that: The spring (304) is sprayed with an epoxy resin anti-oxidation coating.

6. A maximum bubble method surface tension meter control circuit board according to claim 3, characterized in that: The top of the sliding block (305) is provided with a groove (3051).

7. A maximum bubble method surface tension meter control circuit board according to claim 6, characterized in that: Four groups of the disassembly and assembly mechanisms (3) are provided, and the four groups of the disassembly and assembly mechanisms (3) are respectively arranged at the four corners of the control circuit board body (2).

8. The maximum bubble method surface tension meter control circuit board according to claim 3, characterized in that: An elastic sheet (308) is fixedly connected to the inner bottom of the main body housing (1); the elastic sheet (308) is located inside the cylindrical tube (302); and the elastic sheet (308) can exert an upward elastic force on the bottom of the baffle (306).

9. A maximum bubble method surface tension meter control circuit board according to claim 8, characterized in that: The elastic sheet (308) is arranged in an inverted V shape.

10. A maximum bubble method surface tension meter control circuit board according to claim 9, characterized in that: The length of the elastic sheet (308) is smaller than the diameter of the baffle (306).

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