CN204618235U - Eeg signal acquisition electrode - Google Patents

Abstract

The utility model provides an electroencephalogram signal acquisition electrode, which includes a fixed plate, a pin group pierced on the fixed plate, an extrusion plate and a power source. The pin group includes a plurality of pins, and each pin includes a central The conductive needle body of the through hole and the operating mechanism for extruding and sucking the conductive gel from the through hole, which are arranged on the upper part of the conductive needle body and communicated with the through hole, and each conductive needle body in the pin group is connected by a wire form a network structure, and each conductive needle body is located at a node of the network structure. In the EEG signal acquisition electrode of the utility model, the conductive needle body passes through the hair and is pressed on the scalp under the elastic force of the elastic mounting plate to prevent poor contact. , can detect EEG signals stably and accurately, and greatly reduce the requirements for the detected person, and the detected person can even move freely.

Description

EEG signal acquisition electrodes

technical field

The utility model relates to a medical device, in particular to an electroencephalogram signal collecting electrode.

Background technique

EEG measurement is a common medical diagnosis method, and physiological and pathological information can be obtained by collecting EEG signals. EEG measurements can also provide an important source of EEG signals for emerging wearable devices. EEG measurement is to place electrodes at a certain position on the head to accurately acquire weak EEG signals, and then collect, amplify, process and record the EEG signals through EEG equipment such as EEG.

At present, the EEG signal acquisition electrodes can be divided into three types: the first is columnar electrodes, which are large-volume columnar electrodes, and each columnar electrode is inserted into the mesh electrode cap one by one. The barrier makes it difficult for the electrodes to be closely attached to the scalp, which affects the inspection effect. The columnar electrodes are bulky and easily fall from the mesh electrode cap when the head is shaken, which is not suitable for long-term brain examinations. The second type is a metal disc electrode. When in use, it needs to be pasted and fixed on the corresponding position of the patient's scalp with electrode paste or foam glue one by one. The disadvantage is that the paste process needs to be peeled off the hair one by one, which is time-consuming and labor-intensive. The electrode paste or collodion often causes damage to the patient's scalp. At the same time, even if the hair is peeled off, there will still be adhesion under the disc electrode when pasting. A lot of hair strands affect the inspection results. The third is to pre-fix the metal disk electrode in the electrode cap. The disadvantage is that due to the individual differences in the patient's head circumference, the position of each electrode in this electrode cap is fixed, and it is difficult to match the international standard of 10. The -20 standard is in line with the standard, and the electrode is difficult to be close to the scalp due to the barrier of the hair, which affects the inspection effect.

Contents of the invention

The purpose of the utility model is to provide an electroencephalogram signal collecting electrode to solve the problems existing in the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the EEG signal acquisition electrode, which is characterized in that it includes a fixed plate, a pin group pierced on the fixed plate, and an extrusion pin set above the pin group. The pressing plate and the power source driving the reciprocating movement of the pressing plate, the pin group includes a plurality of pins, and each pin includes a conductive pin body with a through hole in the center and a conductive pin body arranged on the upper part of the conductive pin body and connected to the pin body. The through hole communicates with an operating mechanism for extruding and sucking the conductive gel out of the through hole, and each of the conductive pins in the pin group is electrically connected to each other through an electrical connector.

Preferably, the operating mechanism is a piston mechanism, including a piston cylinder, a piston and a piston rod, the piston rod is connected to the bottom of the extrusion plate, and the lower port of the piston cylinder communicates with the through hole.

Preferably, the operating mechanism is a hollow body made of elastic material, and the lower port of the hollow body communicates with the through hole.

Preferably, the power source is an electric push rod or a pneumatic cylinder located above the extrusion plate and fixed on the fixed plate, the push rod of the electric push rod is connected with the extrusion plate or the The piston rod of the pneumatic cylinder is connected with the extrusion plate.

Preferably, the pin group has nine pins, the conductive pin bodies of the nine pins are connected by wires to form a "Tian" shape, and the area of the enclosed area is 80mm ² -150mm ² .

Preferably, the protruding length of the pins from the lower surface of the fixing plate is 2 mm to 5 mm.

The pins of the EEG signal acquisition electrode of the utility model can easily pass through the hair to reach the scalp detection site. The conductive needles are electrically connected to each other through electrical connectors to form a certain area. Further, the conductive needles are used to extrude conductive gel to the scalp to increase the contact area. The specific operation is: the power source outputs a linear motion downwards to drive the extrusion The plate squeezes the operating mechanism. The operating mechanism squeezes the conductive gel downward through the through hole of the conductive needle and directly acts on the scalp. Since the conductive gel is located at the root of the hair, the hair has almost no effect on signal acquisition. No effect, after the test is completed, the power source drives the extrusion plate to move upward, the operating mechanism returns to its original state, and the conductive gel at the scalp and hair roots is sucked back into the pin to realize the recovery of the conductive gel without causing damage to the scalp. The conductive gel can be used many times, which greatly reduces the detection cost.

Furthermore, the operating mechanism is a piston mechanism, including a piston cylinder, a piston and a piston rod. The piston rod is connected to the bottom of the extrusion plate, and the lower port of the piston cylinder is connected to the through hole, which is very convenient to use.

Furthermore, the operating mechanism is a hollow body made of elastic material, and the lower port of the hollow body communicates with the through hole. When in use, the extrusion plate only needs to squeeze the hollow body.

Furthermore, the power source is an electric push rod or a pneumatic cylinder located above the extrusion plate and fixed on the fixed plate, the push rod of the electric push rod is connected with the extrusion plate or the piston rod of the air cylinder Connected with the extrusion plate, the electric push rod and the pneumatic cylinder are easy to control and easy to use.

Furthermore, the pin group has nine pins, and the conductive pins of the nine pins are connected by wires to form a "Tian" shape, and the area of the enclosed area is 80 mm ² to 150 mm ² . Experiments show that the area is Appropriate measurement area.

Description of drawings

FIG. 1 is a schematic structural view of the EEG signal acquisition electrodes in the embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be further described in detail through specific implementation methods below.

The embodiment of electroencephalogram signal acquisition electrode, as shown in Figure 1, comprises fixed plate 4, the pin group that passes through this fixed plate, is located at the extrusion plate 1 above the pin group and drives the extrusion plate to reciprocate The power source, the power source in this embodiment is an electric push rod (not shown in the figure) located above the extrusion plate 1 and fixed on the fixed plate 4, and the push rod of the electric push rod is connected to the extrusion plate 1. The pin group includes a plurality of pins, and each pin includes a conductive pin body 5 with a through hole in the center and an upper part of the conductive pin body 5 and communicated with the through hole for extruding the conductive gel from the through hole. The suction operating mechanism, in this embodiment, the operating mechanism is a hollow body 2 made of elastic material, and the lower port of the hollow body 2 communicates with the through hole. The length of the pins protruding from the lower surface of the fixing plate 4 is 2 mm to 5 mm, 3 mm in this embodiment, and the conductive pin bodies 5 in the pin group are electrically connected to each other through electrical connectors, which can be wires or conductive plates , in this embodiment, the pin group has nine pins, the electrical connector is a wire 3, and the conductive needle body 5 of the nine pins is connected by the wire 3 to form a "Tian" shape, and the area of the enclosed area is 80mm ² ~ 150mm ² .

In the EEG signal collection electrode of this embodiment, the pins can easily pass through the hair and reach the scalp detection site. Each conductive needle body is electrically connected to each other through an electrical connector. The commonly used method is that each conductive needle body in the pin group is connected by a wire to form a network structure with a certain area, and each conductive needle body is located at a node of the network structure. Of course, the conductive needle body can also be worn on the conductive plate to form a certain area. Further, the conductive needle body can be used to squeeze out the conductive gel to the scalp to increase the contact area. The specific operation is: the power source outputs a linear motion downward, Drive the extrusion plate to squeeze the operating mechanism, and the operating mechanism will squeeze the conductive gel downward through the through hole of the conductive needle body and directly act on the scalp. Since the conductive gel is located at the root of the hair, the hair is There is almost no influence on the signal acquisition. After the detection is completed, the power source drives the extrusion plate to move upwards, and the operating mechanism returns to its original state, and the conductive gel at the scalp and hair roots is sucked back into the pin to realize the recovery of the conductive gel without causing damage to the scalp. damage, while the conductive gel can be used multiple times, greatly reducing the detection cost.

In other embodiments of the present utility model, different from the above embodiments, the operating mechanism is a piston mechanism, including a piston cylinder, a piston and a piston rod, the piston rod is connected with the bottom of the extrusion plate, and the bottom of the piston cylinder The port is connected with the through hole, the piston mechanism is simple in structure, easy to operate, and it is easier to control the extrusion amount of the conductive gel; in other embodiments of the utility model, different from the above embodiments, the power source is located Above and fixed on the pneumatic cylinder on the fixed plate, the piston rod of the pneumatic cylinder is connected with the extrusion plate; Wait, the pins are evenly distributed in an area of 80 mm ² to 150 mm ² , and the pins are connected by wires.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not limit it; although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should understand that: still The specific implementation of the utility model can be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solution of the utility model, all of them should be included in the scope of the technical solution claimed by the utility model.

Claims (6)

1. EEG signal collection electrode, it is characterized in that: comprise fixed plate, the pin group that passes through this fixed plate, be located at the extruding plate above this pin group and drive the power that described extruding plate reciprocates source, the pin group includes a plurality of pins, and each pin includes a conductive pin body with a through hole in the center and an upper part of the conductive pin body and communicated with the through hole for transferring the conductive gel from the An operating mechanism for extruding and sucking in the through hole, and each of the conductive pins in the pin group is electrically connected to each other through an electrical connector. 2. The EEG signal acquisition electrode according to claim 1, characterized in that: the operating mechanism is a piston mechanism, comprising a piston cylinder, a piston and a piston rod, and the piston rod is connected to the bottom of the extruding plate , the lower port of the piston cylinder communicates with the through hole. 3. The electroencephalogram signal acquisition electrode according to claim 1, characterized in that: the operating mechanism is a hollow body made of elastic material, and the lower port of the hollow body communicates with the through hole. 4. The EEG signal acquisition electrode according to claim 1, 2 or 3, characterized in that: the power source is an electric push rod or an air pressure that is positioned above the extrusion plate and fixed on the fixed plate cylinder, the push rod of the electric push rod is connected with the extrusion plate or the piston rod of the pneumatic cylinder is connected with the extrusion plate. 5. The electroencephalogram signal acquisition electrode according to claim 1, characterized in that: the pin group has nine pins, and the conductive needle bodies of the nine pins are connected by wires to form a "field". ", and the area of the enclosed area is 80mm ² to 150mm ² . 6. The EEG signal acquisition electrode according to claim 1, characterized in that: the length of the pin protruding from the lower surface of the fixing plate is 2 mm to 5 mm.