CN117883088A - Ear clip electrode - Google Patents

Abstract

The invention discloses an ear clip electrode which can record brain electrical signals and transmit electric stimulation. Comprises a first clamp body, a second clamp body, an electrode column, a porous column and a wire. The first clamp body and the second clamp body are hinged to form an ear clamp body; an electrode holder is arranged on the first clamp body. The electrode column is fixed in the electrode seat on the first clamp body, and the connection part of the electrode column and the lead adopts waterproof sealing. The porous column is made of porous materials, and can generate elastic deformation in the axial direction and the radial direction when being stressed, and the axial compression deformation is smaller than the radial compression deformation. The porous column can absorb and slowly release the conductive medium and is fixed in the cavity of the electrode seat by radial extrusion. The ear clip electrode provided by the invention can be used for recording brain electrical signals and transmitting current stimulation, the electrode column is directly contacted with skin, the porous column can accurately release trace conductive medium, the electrode-skin interface is stable, the fixing effect is good, the wearing is comfortable, and the cleaning and the maintenance are easy.

Description

Ear clip electrode

Technical Field

The invention relates to an ear clip electrode which is mainly used for electroencephalogram recording or nerve electrical stimulation application.

Background

Electroencephalograms have been widely used in medical settings as a standard examination of neurology, from routine diagnosis to nerve monitoring of critically ill patients or ICUs. The diagnosis and treatment of the brain electricity in rehabilitation also becomes a new application of rapid development. In electroencephalogram monitoring, the ear clip electrode can be used as a reference electrode and a ground electrode in the electroencephalogram acquisition process, and the signal quality and convenient and comfortable use experience of the ear clip electrode provide new requirements for the existing products.

The prior ear clip electrode mainly has the following three structures. The first is a pure metal spring structure, electrodes are fixed on two sides of the spring, and the ear clip has small clipping force, large volume and poor stability. Chinese patent CN 203493637U discloses an electroencephalogram ear electrode fixed on a metal ear electrode bracket, which is designed by a liquid storage structure and is matched with cotton to absorb Cl-containing material Conductive liquid is used. But uses cotton to absorb Cl-containing The release of the conductive liquid is uncontrollable and easy to volatilize, and the conductive liquid is difficult to achieve accurate slow release, so the service time is short; in addition due to Cl The high corrosiveness to metal easily causes the ear clip to lose clamping force, and the service life is short. The other type is a plastic clip matched with a stainless steel spring, the clip force is provided by the stainless steel spring, conductive paste needs to be smeared when the brain electricity is collected, the ear clip is matched with the conductive paste for use, the operation is inconvenient, the tested experience is poor, and meanwhile, the conductive paste contains high-concentration Cl The stainless steel spring is easy to corrode in the use process, so that the ear clip is corroded, and the service life is poor. The third type ear clip adopts a plastic clip to be matched with a rubber ring, provides clamping force through the rubber ring, is matched with conductive paste for use, is inconvenient to operate, causes inconvenience in a plurality of application scenes due to the use of the conductive paste, and is especially suitable for household application scenes. In addition, the conductive paste is easy to remain and the cleaning is more time-consuming. Chinese patent CN 207506573U discloses an ear clip electrodeThe two clamping pieces are fixed by using the rubber ring, and the electrode terminal is designed with the conductive paste in a concave manner to store the conductive paste, but the problem that whether the whole electrode contains other metal components or not is not explicitly disclosed, and the use of the conductive paste is inconvenient to operate and troublesome to clean and maintain is solved.

Transcranial microcurrent stimulation utilizes ear clip electrodes to stimulate low-intensity pulse microcurrent to the brain, improves abnormal brain waves, promotes the release of a series of neurotransmitters related to sleep and emotion to regulate brain activities so as to achieve the aim of treating insomnia and anxiety, and is widely applied to the treatment of anxiety, insomnia, depression and other diseases. In the prior art, the metal electrode or the silica gel electrode is matched with the sponge plaster and the conductive liquid for use, the saline is volatilized fast, the electrode-skin interface is unstable, the electrode-skin impedance is high and unstable, and the pricking pain is strong. In addition, the ear clip body contains a metal component, and is easy to corrode under the action of conductive liquid, so that the service life of the ear clip body is reduced, and the use effect is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the ear clip electrode which can be used for recording brain electrical signals and transmitting current stimulation, the ear clip structure is free of metal materials, corrosion is effectively avoided, the electrode column is directly contacted with skin, the porous column can accurately release trace conductive media, the electrode-skin interface is stable, the signal quality is high, the fixing effect is good, the wearing is comfortable, and the cleaning and the maintenance are easy.

The technical scheme of the invention is as follows:

an ear clip electrode can record brain electrical signals and transmit current stimulation, and comprises a first clip body, a second clip body, an electrode column, a porous column and a lead; the first clamp body and the second clamp body are hinged to form an ear clamp body; the first clamp body is provided with an electrode seat; the electrode column is fixed in the electrode seat on the first clamp body, and the connection part of the electrode column and the lead is waterproof sealed; the porous column is made of porous materials, and can generate elastic deformation in the axial direction and the radial direction when stressed, and the axial compression deformation is smaller than the radial compression deformation; the porous column can absorb and slowly release the conductive medium and is fixed in the cavity of the electrode seat by radial extrusion.

The further technical scheme is as follows:

the ear clip electrode is characterized in that corresponding clamping grooves are formed in the first clip body and the second clip body, and plastic reeds for fixing the two clip bodies are arranged in the clamping grooves.

The height of the porous column of the ear clip electrode, which is higher than the electrode seat, is 0.1-3.0 mm, and the height of the electrode column, which is higher than the porous column, is 0-3.0 mm.

The porous column of the ear clip electrode can absorb conductive medium with the mass 1-12 times of that of the ear clip electrode.

The axial compression deformation of the porous column of the ear clip electrode is 10% -30% of the radial compression deformation when the porous column is subjected to the same pressure.

The end face of the electrode column of the ear clip electrode is provided with a plurality of micro-protrusion structures, and the height of the ear clip electrode is 0.1-2 mm.

The first clamp body and the second clamp body of the ear clamp electrode are made of nonmetallic materials; corresponding fixing grooves are formed in the first clamp body and the second clamp body, and rubber rings for fixing the two clamp bodies are arranged in the fixing grooves.

The number of the fixing grooves of the ear clip electrode is 1-3 pairs.

The lead of the ear clip electrode passes through the lead hole on the electrode seat and is fixed in the lead groove, and passes through the tail end wire outlet hole.

The front section and the rear section of the wire groove of the ear clip electrode deviate from the middle section of the wire groove by an angle of 3-30 degrees.

The tail ends of the first clamp body and the second clamp body of the ear clamp electrode are provided with anti-slip designs.

The ear clip electrode is made of porous material selected from water-absorbing fiber and sponge; the conductive medium is conductive liquid, flowable conductive adhesive or a mixture of the conductive liquid and the flowable conductive adhesive; the electrode column is made of one of Ag/AgCl powder, ag/AgCl plating, ABS plating Ag/AgCl, silver, gold, stainless steel and carbon-based conductive materials.

The ear clip electrode provided by the invention has the remarkable beneficial effects that:

the ear clip electrode absorbs and slowly releases the conductive medium through the porous column, is convenient and quick to operate, is easy to clean and maintain, and is suitable for multiple scenes such as medical treatment, families and the like. The electrode column can be in direct contact with skin to be detected, and the micro-protrusion structure arranged on the end face of the electrode column can further improve the stability and effectiveness of connection between the electrode and the skin under the action of the clamping force of the ear clip. The porous column is fixed in the electrode seat through radial extrusion, and due to the radial restorability elastic deformation of the porous column, the stability of the porous column in the electrode seat is ensured, the close contact between the porous column and the electrode column is ensured, and a stable electrode-conductive medium interface can be formed after the porous column absorbs the conductive medium; meanwhile, the porous column is used as a liquid storage carrier for absorbing the conductive medium, and the conductive medium can be continuously and slowly released through capillary action and surface tension, so that the skin is wetted, an effective electrode-skin interface can be formed between the electrode and the skin, the skin impedance is reduced, the stability of the conductive medium-skin interface is maintained, and the quality of the acquired signal or the effectiveness of current stimulation conduction is ensured.

Because the porous column is smaller in axial deformation when being stressed and has certain rigidity in the axial direction, the porous column around the electrode column can well support the skin under the action of the clamping force of the ear clip, and simultaneously can accurately slowly release trace conductive medium to wet the skin, so that the electrode column and the conductive medium released by the porous column are simultaneously contacted with the skin, and the stability of an electrode-conductive medium-skin interface is better maintained. The existing saline electrode technology adopts cotton absorbed with saline or flexible sponge soaked with conductive liquid to be placed between the electrode and the skin, so that the conductive liquid squeezed out during stress is too much to realize accurate slow release, the stability of the electrode-conductive medium-skin interface is poor, and the working time is short.

In addition, the ear clip body is made of nonmetallic materials, so that high-concentration Cl of a conductive medium is effectively avoided The metal is corroded strongly, and the service life is long. The ear clip electrode cavity type electrode seat structural design can effectively avoid volatilization of a conductive medium and prolong the working time of an electrode. The ear clip electrode cable has special wire slot and tail end wire outlet hole, and the front and rear sections of the wire slot and middle section have certain deflection angle, so that it can fix wire and reduce stress of wireConduction, signal noise and instability caused by unexpected external force pulling of the lead are avoided, and the service life of the ear clip electrode is prolonged. The tail end of the clamp body is provided with an anti-slip design, which is convenient for a user to operate and use.

Drawings

Fig. 1 is a schematic view of an ear clip electrode according to the present invention.

Fig. 2 is a schematic structural view of another ear clip electrode provided by the invention, wherein corresponding fixing grooves are formed in the first clip body and the second clip body, and rubber rings for fixing the two clip bodies are arranged in the fixing grooves.

1-a first clamp; 11-an electrode holder; 12-a wire groove; 13-a tail end wire outlet hole; 2-a second clamp; 21-an anti-slip structure; 3-an electrode; 31-a microprojection structure; 4-a porous column; 5-conducting wires; 6-plastic reed; 61-a clamping groove; 7-a rubber ring; 71-a fixed slot.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings.

Example 1: is a basic embodiment of the present invention. As shown in FIG. 1, an ear clip electrode is capable of recording brain electrical signals and delivering current stimuli. The ear clip electrode comprises a first clip body 1, a second clip body 2, an electrode column 3, a porous column 4 and a lead 5. The first clamp body 1 and the second clamp body 2 are hinged to form an ear clamp body. The first clamp body 1 is provided with an electrode seat 11. The electrode column 3 is fixed in an electrode seat 11 on the first clamp body 1, and the joint of the electrode column 3 and the lead 7 is waterproof and sealed. The porous column 4 is made of porous materials, and can generate elastic deformation in the axial direction and the radial direction when being stressed, and the axial compression deformation is smaller than the radial compression deformation. The porous column 4 can absorb and slowly release the conductive medium and is fixed in the cavity of the electrode seat 11 by radial extrusion.

The ear clip electrode has the advantages that: the porous column is used for absorbing and slowly releasing the conductive medium, is convenient and quick to operate, is easy to clean and maintain, and is suitable for multiple scenes such as medical treatment, families and the like. The electrode column can be in direct contact with skin to be detected, the microprojection structure is arranged on the end face of the electrode column, under the action of the clamping force of the ear clamp, the conductive liquid infiltrates into the interface between the electrode and the skin to form a stable low electrode-skin impedance interface, and the stability and effectiveness of connection between the electrode and the skin are further improved. The porous column is fixed in the electrode seat through radial extrusion, and due to the radial restorability elastic deformation of the porous column, the stability of the porous column in the electrode seat is ensured, the close contact between the porous column and the electrode column is ensured, and a stable electrode-conductive medium interface can be formed after the porous column absorbs the conductive medium; meanwhile, the porous column is used as a liquid storage carrier for absorbing the conductive medium, and the conductive medium can be continuously and slowly released through capillary action and surface tension, so that the skin is wetted, the skin impedance is reduced, the stability of a conductive medium-skin interface is maintained, and the quality of the collected signals or the effectiveness of current stimulation conduction is ensured. Because the porous column is smaller in axial deformation when being stressed and has certain rigidity in the axial direction, the porous column around the electrode column can well support the skin under the action of the clamping force of the ear clip, and simultaneously can accurately slowly release trace conductive medium to wet the skin, so that the electrode column and the conductive medium released by the porous column are simultaneously contacted with the skin, and the stability of an electrode-conductive medium-skin interface is better maintained. The existing saline electrode technology adopts cotton absorbed with saline or flexible sponge soaked with conductive liquid to be placed between the electrode and the skin, so that the conductive liquid squeezed out during stress is too much to realize accurate slow release, the stability of the electrode-conductive medium-skin interface is poor, and the working time is short.

Example 2: is a preferred embodiment of the present invention. As shown in fig. 1 and 2, an ear clip electrode can record brain electrical signals and transmit current stimuli. The ear clip electrode comprises a first clip body 1, a second clip body 2, an electrode column 3, a porous column 4 and a lead 5. The first clamp body 1 and the second clamp body 2 are made of nonmetallic materials (such as plastics), so that high-concentration Cl of a conductive medium can be effectively avoided The metal is corroded strongly, and the service life is long. Corresponding clamping grooves 61 are formed in the first clamp body 1 and the second clamp body 2, plastic reeds 6 for fixing the two clamp bodies are arranged in the clamping grooves, and the ear clamp bodies are formed through hinging. When the first clamp body 1 and the second clamp body 2 are internally provided with 1, 2 or 3 pairs of fixing grooves 71, the fixing groovesA rubber ring 7 for fixing the two clamp bodies is arranged in the clamp body, so that the clamp body is an equivalent embodiment. The clamping force of the ear clip electrode can be provided like a plastic reed through the fixing groove and the rubber ring. In order to further enhance the clamping force of the ear clip electrode, a design of a fixing groove and a rubber ring can be added on the basis of the plastic reed 6. The rubber ring 7 is one of natural rubber, EPDM rubber, chloroprene rubber, fluorinated rubber, nitrile rubber, silicone rubber, thermoplastic elastomer TPU and thermoplastic elastomer TPE. The electrode holder 11 is arranged on the first clamp body 1, so that volatilization of a conductive medium is effectively avoided, and the working time of the electrode is prolonged. The tail ends of the first clamp body 1 and the second clamp body 2 are provided with an anti-slip design 21, so that the operation and the use of a user are facilitated. The electrode column 3 is higher than the porous column 4 by 0.1mm, 0.5 mm, 1mm or 2 mm. The end face of the electrode column 3 is provided with a number of micro-protrusion structures 31, the heights of which are preferably from 0.1mm, 0.5 mm, 1.0 mm, 2.0mm, 3.0 mm. The electrode column 3 is fixed in an electrode seat 11 on the first clamp body 1, and the joint of the electrode column 3 and the lead 7 is waterproof and sealed. The lead 5 passes through the lead hole on the electrode seat and is fixed in the lead groove 12, and passes through the tail end wire outlet hole 13. The front section and the rear section of the wire groove deviate from the middle section of the wire groove by an angle of 3-30 degrees. Therefore, the lead can be effectively fixed, the stress conduction of the lead can be reduced, the signal noise and instability caused by pulling the lead by unexpected external force are avoided, and the service life of the ear clip electrode is prolonged. The microprotrusion structure can increase the contact area and contact pressure of the electrode and the skin without affecting comfort. While facilitating penetration of the conductive medium released by the peripheral porous pillars between the electrode and the skin. The electrode column 3 is made of one of Ag/AgCl powder, ag/AgCl plating, ABS plating Ag/AgCl, silver, gold, stainless steel and carbon-based conductive materials. The porous column 4 is made of porous materials and is selected from one of water-absorbing fibers and sponge. The porous column 4 can generate elastic deformation in the axial direction and the radial direction when being stressed, and the axial compression deformation is smaller than the radial compression deformation. Preferably, the porous column is one of 10%, 20% or 30% of the radial compression set when subjected to the same pressure. The porous column 4 can absorb 1, 4, 6, 8 or 12 times of the conductive mediumAnd the sustained-release conductive medium is fixed in the cavity of the electrode holder 11 by radial extrusion. The height of the porous column 4 above the electrode holder 11 may be 0.1mm, 0.5 mm mm, 1.0 mm, 2.0mm or 3.0 mm. The conductive medium is conductive liquid, flowable conductive adhesive or a mixture of the conductive liquid and the flowable conductive adhesive.

The above-described embodiments of the present invention are merely exemplary of further technical solutions, principles, applications, effects, etc., and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the inventive concept of the present invention, which fall within the scope of the present invention. That is, the scope of the claims of the present invention is not limited to the above-described embodiments.

Claims (12)

1. An ear clip electrode, characterized in that: the brain electrical signal and the transmission current stimulation can be recorded; comprises a first clamp body (1), a second clamp body (2), an electrode column (3), a porous column (4) and a lead (5); the first clamp body (1) and the second clamp body (2) are hinged to form an ear clamp body; an electrode seat (11) is arranged on the first clamp body (1); the electrode column (3) is fixed in an electrode seat (11) on the first clamp body (1), and the joint of the electrode column (3) and the lead (5) is waterproof and sealed; the porous column (4) is made of porous materials, can generate elastic deformation in the axial direction and the radial direction when stressed, and has smaller axial compression deformation than radial compression deformation; the porous column (4) can absorb and slowly release the conductive medium and is fixed in the cavity of the electrode seat (11) through radial extrusion.

2. The ear clip electrode of claim 1, wherein: corresponding clamping grooves (61) are formed in the first clamp body (1) and the second clamp body (2), and plastic reeds (6) for fixing the two clamp bodies are arranged in the clamping grooves.

3. The ear clip electrode of claim 1, wherein: the height of the porous column (4) higher than the electrode seat (11) is 0.1-3.0 mm, and the height of the electrode column (3) higher than the porous column (4) is 0-3.0 mm.

4. The ear clip electrode of claim 1, wherein: the porous column (4) can absorb conductive medium with the mass 1-12 times of that of the porous column.

5. The ear clip electrode of claim 1, wherein: the axial compression deformation of the porous column (4) is 10% -30% of the radial compression deformation when the porous column is subjected to the same pressure.

6. The ear clip electrode of claim 1, wherein: the end face of the electrode column (3) is provided with a plurality of micro-protrusion structures (31), and the height of the micro-protrusion structures is 0.1-2 mm.

7. The ear clip electrode of claim 1, wherein: the first clamp body (1) and the second clamp body (2) are made of nonmetallic materials; corresponding fixing grooves (71) are formed in the first clamp body (1) and the second clamp body (2), and rubber rings (7) for fixing the two clamp bodies are arranged in the fixing grooves.

8. The ear clip electrode of claim 7, wherein: the number of the fixing grooves (71) is 1-3 pairs.

9. The ear clip electrode of claim 1, wherein: the lead (5) passes through a lead hole on the electrode seat and is fixed in the lead groove (12) and passes through a tail end wire outlet hole (13).

10. The ear clip electrode of claim 9, wherein: the front section and the rear section of the wire groove (12) deviate from the middle section of the wire groove by an angle of 3-30 degrees.

11. The ear clip electrode of claim 1, wherein: the tail ends of the first clamp body (1) and the second clamp body (2) are provided with anti-skid designs (21).

12. The ear clip electrode of claim 1, wherein: the porous hydrophilic material is selected from one of water-absorbing fiber and sponge; the conductive medium is conductive liquid, flowable conductive adhesive or a mixture of the conductive liquid and the flowable conductive adhesive; the electrode column is made of one of Ag/AgCl powder, ag/AgCl plating, ABS plating Ag/AgCl, silver, gold, stainless steel and carbon-based conductive materials.