CN210834751U - Screen printing electrode connector - Google Patents

Abstract

The utility model discloses a screen-printed electrode connector. The rear end of the connector body is provided with a VGA interface, the front end of the connector body is provided with a wafer stage, and the wafer stage has a groove, the size of which is consistent with that of a flat electrode , which is used to secure the flat electrode to the stage. An electrode card slot is arranged at the intersection of the middle part of the connector body and the base of the slide table, and the inside of the electrode card slot is provided with a pressure pin contact piece, and the pressure needle contact piece is arranged in a paperclip elastic U-shaped structure. The screen-printed electrodes of the flat plate are fixedly inserted into the electrode grooves by pressing the needle contacts. The new screen-printed electrode connector is easy to use and has a good connection effect. Repeated use does not affect elasticity, reduces insertion and removal loss, and improves the stability of electrode detection. Improved detection efficiency. VGA multi-pin wiring and multi-array contact electrode layout increase the diversity of contamination analysis and broaden the scope of applications.

Description

A screen-printed electrode connector

technical field

The utility model belongs to the technical field of electrode connection equipment, in particular to a screen-printed electrode connector.

Background technique

At present, the commonly used detection methods of heavy metal ions include atomic emission spectrometry (AES), atomic absorption spectrometry (AAS), inductively coupled plasma-mass spectrometry (ICP-MS) and so on. However, these methods are difficult to achieve on-site monitoring due to complicated operation, expensive instruments, and inconvenient portability. In scientific research and practical application, electrochemical method is not only an analytical method, but also a necessary tool for research. It usually takes only a few minutes to measure a sample, the data is automatically saved, and it can be detected online in complex environments.

Most of the existing screen-printed electrodes are suspended in the actual use, and the support is unstable, and there is no special connection device. Due to vibration interference and other phenomena in the on-site monitoring environment, they are easily disturbed by environmental physical disturbances. Therefore, it is easy to cause the detected droplets to slip off, which affects the accuracy and repeatability of the detection. Secondly, connecting with guide clips will also generate noise and affect the sensitivity of the analysis. The screen-printed electrodes in the prior art have a single structure, and the common interface has only three electrodes (of which there is only one working electrode), and can only detect one metal ion at a time. The limitations affect the efficiency of the analysis and the application is limited. In addition, the plug-in port adapted to the screen-printed electrode has a single structure, which leads to a plug-in loss during use and a short service life. Therefore, how to develop a screen-printed electrode connector to achieve rapid, sensitive and accurate on-site online detection of various heavy metal ions in complex water bodies has important practical significance.

Utility model content

Aiming at the technical problems in the prior art that the use and connection support of SPE screen-printed electrodes is poor, resulting in inaccurate detection results, the purpose of the present invention is to provide a screen-printed electrode connector, which has a simple structure and is easy to use. It is easier to control the stay of the droplet on the electrode. The structure of the paperclip elastic U-shaped indenter is simple and novel, the contact effect is good, and the elasticity is not affected by repeated use; VGA multi-pin wiring and multi-array contact electrode layout have a wide range of applications .

The technical scheme adopted by the utility model is as follows: a screen-printed electrode connector includes a connector body, a VGA interface is arranged at the rear end of the connector body, a wafer stage is arranged at the front end of the connector body, and a wafer stage is arranged on the wafer stage. There is a groove, the size of which is the same as that of the plate electrode, through which the plate electrode is fixed on the stage; the position where the middle part of the connector body and the base of the stage meet is provided with an electrode slot, and the inside of the electrode slot is provided There is a pressing needle contact piece, the pressing needle contact piece is arranged in a paperclip type elastic U-shaped structure, and the flat screen printing electrode is fixedly inserted into the electrode card slot through the pressing needle contact piece.

Further, the thickness of the recess of the wafer stage is the same as the thickness of the plate electrode, and the plate electrode is arranged in a rectangular parallelepiped plate-like structure that is compatible with the wafer stage.

Further, one end of the flat electrode is set as a circuit connection end, and is inserted into the electrode slot through the circuit connection end; the other end of the flat electrode is set as the electrode working area, and the detected water sample is set in the electrode working area. detection. Test water samples

Further, the electrode working area of the flat electrode is arranged in a ring shape from the inside to the outside and is provided with a reference electrode, a contrast electrode, and a working electrode, the reference electrode is arranged at the center position, and the contrast electrode is along the periphery of the reference electrode. It is set as a ring-shaped structure, and the working electrode is set along the periphery of the comparative electrode as a circular structure formed by several arc-shaped electrodes arranged at equal intervals, and the comparative electrode and the working electrode form a conductive loop.

Further, the reference electrode is made of pure silver material, and the reference electrode is made of carbon material.

Further, the working electrode is prepared by selecting silver, gold or other conductive materials according to different detection pollutants and detection systems.

Further, the working electrode is configured as several arc electrodes, and the several arc electrodes are prepared by using the same material or using different materials.

Further, the VGA interface is configured as an interface with several pins, one of which is grounded, and the other pins are respectively connected to the corresponding working electrode, reference electrode and contrast electrode.

Further, the working electrodes are provided with 6 correspondingly, and the VGA interface is set as an interface with 9 pins, one of which is a ground wire, and the remaining 8 pins are respectively connected to the corresponding 6 working electrodes and 1 reference electrode. , 1 contrast electrode.

Further, when the screen-printed electrode of the flat plate is inserted into the electrode slot, the U-shaped bottom end of the pressing pin contact member will bounce up, and the screen-printed electrode will be pressed down by the elastic force.

The beneficial effects of the present utility model are:

(1) The application adds a slide table, which plays a stable supporting role for the screen-printed electrode of the flat plate, which can ensure that it is placed horizontally on the electrode stage, so that the solution to be detected is dripped more uniformly and balanced. Cover the detection end of the electrode (electrode group around the center of the circle) to improve the accuracy of the measurement and the stability of repeated detection.

(2) The flat electrode of the present application is set as a screen-printed electrode with a plurality of working electrodes, which can be detected at the same time. Multiple working electrodes can be the same electrode material for parallel detection of the same pollutant, or different electrode materials. One electrode can analyze different pollutants at the same time, and the degree of freedom of analysis selection is higher and the applicability is stronger.

(3) The electrode card slot in this application adopts the form of a plug-in interface containing a paperclip-type elastic U-shaped structure, which is convenient and quick to plug and pull, the elastic contact tightness is high, and it is not easy to fall off, which is conducive to reducing the electromagnetic field interference of the working environment, Reduce noise and improve analysis accuracy.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the connector in the present invention.

FIG. 2 is a schematic structural diagram of a flat electrode in the utility model.

FIG. 3 is a schematic structural diagram of the mutual cooperation between the electrode slot and the pressing pin contact piece in the present invention.

Among them, 1, VGA interface; 2, electrode card slot; 3, water sample detection; 4, flat electrode; 5, slide table; 6, working electrode I; 7, working electrode II; 8, working electrode III; 9, reference electrode; 10, working electrode IV; 11, contrast electrode; 12, working electrode V; 13, working electrode VI; 14, pressing needle contact.

Detailed ways

The present utility model is further described below in conjunction with the accompanying drawings.

Example 1

The utility model is designed in order to make the use of the screen-printed electrodes more convenient, the detection more accurate and reliable, and the simultaneous analysis of multiple pollutants, thereby shortening the analysis time and improving the efficiency. As shown in FIG. 1, a screen-printed electrode connector includes a connector body, the rear end of the connector body is provided with a VGA interface 1, and the VGA interface 1 is configured as an interface of several pins, one of which is grounded The remaining needles are connected to the corresponding working electrode, reference electrode 9 and reference electrode 11 respectively.

The rear end of the connector body is provided with a wafer stage 5, and the wafer stage 5 is recessed inward along the surface of the connector body to form a groove that is compatible with the plate electrode 4. The middle part of the connector body and the wafer stage 5 The position where the bases meet is provided with an electrode slot 2, and a pressure pin contact piece 14 is arranged inside the electrode slot 2. The pressure pin contact piece 14 is set to a paperclip-type elastic U-shaped structure (as shown in FIG. 3), and the plate electrode 4 passes through The pressing pin contact piece 14 is inserted into the electrode slot 2. After the screen-printed electrode of the flat plate is inserted into the slot, the U-shaped bottom end of the pressing pin contact piece 14 will bounce, and the screen-printed electrode will be pressed by the elastic force. .

The concave thickness of the wafer stage 5 is the same as the thickness of the flat electrode 4 , and the flat electrode 4 is arranged in a rectangular parallelepiped plate-like structure adapted to the wafer stage 5 .

One end of the plate electrode 4 is set as the circuit connection end, and is inserted into the electrode slot 2 through the circuit connection end; the other end of the plate electrode 4 is set as the electrode working area, and the detection water sample 3 is set in the electrode working area for detection.

There are 6 working electrodes correspondingly, and VGA interface 1 is set as a 9-pin interface, one of which is a ground wire, and the remaining 8 pins are respectively connected to the corresponding 6 working electrodes, 1 reference electrode 9, and 1 for comparison. Electrode 11.

The VGA interface 1 can be replaced with a U disk interface.

The electrodes in this application are printed with different electrode materials on a flat plate (usually ceramic sheets are used), one end is a circuit connection end, which is inserted into the interface part of the connector (such as inserting a U disk), and the other end is an electrode The working area is composed of three parts. The reference electrode 9, the reference electrode 11 and the working electrode are arranged in a ring shape from the inside to the outside. A ring is the reference electrode 11 (a ring-shaped structure is arranged along the periphery of the reference electrode 9 ), which forms a conductive loop with the working electrode. The outermost six arc electrodes are working electrodes (arranged in a circular structure formed by several arc electrodes arranged at equal intervals along the periphery of the comparison electrode 11 ), which are the detection target pollutants and the core area of the electrodes. The central reference electrode 9 is generally pure silver, the outer ring reference electrode 11 is carbon material, and the outer working electrode can be silver, gold or other conductive materials, which can be freely selected according to different detection pollutants and detection systems.

The reference electrode 9 is made of pure silver material, and the reference electrode 11 is made of carbon material.

The working electrode is prepared by selecting silver, gold or other conductive materials according to different detection pollutants and detection systems.

The working electrodes are set as six arc electrodes, and the six arc electrodes are prepared with the same material or with different materials.

Example 2

On the basis of Embodiment 1, different from Embodiment 1, as shown in FIG. 1 , FIG. 2 and FIG. 3 ,

This connector device is used for screen printing electrodes (as shown in Figure 2), working electrode I6, working electrode II7, working electrode III8, reference electrode 9, working electrode IV10, contrast electrode 11, working electrode V12, working electrode VI13.

The thickness of the depression of the electrode stage 5 is the same as the thickness of the electrode (2mm). The pressure pin contact piece 14 adopts a paperclip elastic U shape, and the diameter of the metal wire is 1mm. When the flat screen-printed electrode is inserted, the pressure pin contact piece 14 The bottom end of the U will bounce, and the elastic force of the U bend will press the electrode, making the contact tighter and the conductivity better. The position of the bottom end of U in contact with the indenter contact piece 14 is exactly in the middle of each contact point of the plate electrode 4 (the thickness of the contact line on the electrode is 2mm, after the contact, 0.5mm is left on both sides of the indenter contact piece 14). Inside the device body, the end of the pressure pin contact piece 14 is connected with the VGA interface 1 by a wire, so that each pin of the VGA is connected with a specific electrode, and one of the nine VGA pins is a ground wire, which is not connected to any pressure pin contact piece. 14 U bottom end (only 8 electrodes).

It solves the shortcomings of the other interfaces mentioned above, improves the stability of detection, expands the simultaneous detection of multiple pollutants analyzed, and improves the detection efficiency. At the same time, it also makes the device more beautiful, more convenient to use, and less disturbed by external noise.

The above is not a limitation of the present utility model, it should be pointed out: for those of ordinary skill in the art, without departing from the essential scope of the present utility model, several changes, modifications, additions or replacements can also be made , these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (9)

1. A screen printing electrode connector is characterized by comprising a connector body, wherein a VGA interface is arranged at the rear end of the connector body, a slide holder is arranged at the front end of the connector body, a groove is formed in the slide holder, the size of the groove is consistent with that of a flat electrode, and the flat electrode is fixed on the slide holder through the groove; the middle part of the connector body and the position where the slide glass table base is connected are provided with electrode clamping grooves, pressing needle contact pieces are arranged inside the electrode clamping grooves and are of a flexible U-shaped structure, and flat screen printing electrodes are fixedly inserted into the electrode clamping grooves through the pressing needle contact pieces.

2. The screen-printed electrode connector as claimed in claim 1, wherein the thickness of the recess of the stage is the same as the thickness of the plate electrode, and the plate electrode is configured as a rectangular plate-like structure adapted to the stage.

3. The screen-printed electrode connector according to claim 1, wherein one end of the plate electrode is provided as a circuit connection end, and is inserted into the electrode card slot through the circuit connection end; the other end of the flat electrode is set as an electrode working area, and the detected water sample is dripped in the electrode working area for detection.

4. The screen printing electrode connector according to claim 1, wherein the electrode working area of the flat electrode is sequentially provided with a reference electrode, a contrast electrode and a working electrode in an annular shape from inside to outside, the reference electrode is arranged at the central position, the contrast electrode is arranged in a circle of annular structure along the periphery of the reference electrode, the working electrode is arranged in an annular structure formed by a plurality of arc electrodes in an equidistant arrangement along the periphery of the contrast electrode, and the contrast electrode and the working electrode form a conductive loop.

5. The screen-printed electrode connector according to claim 4, wherein the reference electrode is made of pure silver and the reference electrode is made of carbon material.

6. The screen printed electrode connector of claim 4, wherein the working electrode is fabricated from a silver, gold or other conductive electrode material selected for different contaminant and detection systems.

7. The screen printed electrode connector of claim 6, wherein the working electrode is provided as a plurality of arc-shaped electrodes, and the plurality of arc-shaped electrodes are made of the same material or different electrode materials.

8. The screen-printed electrode connector according to claim 1, wherein the VGA interface is provided as an interface with a plurality of pins, one of the pins is connected with a ground wire, and the other pins are respectively connected with a corresponding working electrode, a corresponding reference electrode and a corresponding comparison electrode.

9. The screen-printed electrode connector according to claim 1, wherein when the screen-printed electrode of the flat plate is inserted into the electrode card slot, the U-shaped bottom end of the pressing pin contact piece is sprung up, and the screen-printed electrode is pressed by the spring force.

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