CN210843047U

CN210843047U - Telescopic electrode and electroencephalogram detection terminal applying same

Info

Publication number: CN210843047U
Application number: CN201921373680.6U
Authority: CN
Inventors: 胡斌; 赵庆林; 彭宏; 刘景鑫
Original assignee: Lanzhou University
Current assignee: Lanzhou University
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-26
Anticipated expiration: 2029-08-22

Abstract

The utility model provides a telescopic electrode and brain electricity detection terminal, wherein, telescopic electrode include the cavity of tube-shape, with the cavity is connected and is used for cooperating the cavity to install this telescopic electrode in the knob of the casing at brain electricity detection terminal, cavity axial displacement's electrode tip relatively to and be used for making the electrode tip keep away from the reset spring of cavity. But through establishing into relative cavity axial displacement with the electrode tip to make the electrode tip keep away from the trend of cavity, make and can follow the relative position of examinee's forehead position automatically regulated electrode tip and cavity when it is applied to brain electricity detection terminal, guarantee that the electrode tip contacts forehead skin, satisfy different head circumference size users' use, and guarantee the accuracy of testing result.

Description

Telescopic electrode and electroencephalogram detection terminal applying same

Technical Field

The utility model relates to an electroencephalogram detection technology field especially relates to a telescopic electrode and use its electroencephalogram detection terminal.

Background

Some existing consumer-grade electroencephalogram detection terminals can meet the requirement of simple electroencephalogram detection functions and can be applied to a certain extent, wherein the used non-implanted electrodes mostly comprise dry electrodes and wet electrodes, the dry electrodes are mainly used for hairless areas, the use of patch electrodes is the most extensive, and although the patch electrodes have the advantage of convenience in use, the accuracy is low. The wet electrode is mostly used for a hair area, the precision is relatively high, but materials such as conductive paste and physiological saline need to be matched when the wet electrode is used, and the problems that part of testees are allergic to the conductive paste, the wearing is complicated and the like exist. In the existing electroencephalogram detection terminal, after the electrode and the shell are installed, the distance between the electrode tip and the skin of a detected person is fixed, and when the electroencephalogram detection terminal is used next time, if the head circumference of the detected person is different, a gap exists between the electrode tip and the skin, the electrode tip and the skin cannot be tightly attached to the skin of the detected person, and the detection precision is affected.

SUMMERY OF THE UTILITY MODEL

The first object of the present invention is to provide a telescopic electrode which can make the electrode tip tightly attached to the skin of the person under test to improve the accuracy of the test result.

Another object of the utility model is to provide an use electroencephalogram detection terminal of above-mentioned telescopic electrode.

In order to achieve the above object, the present invention provides the following technical solutions:

as a first aspect, the utility model provides a telescopic electrode is applicable to the EEG detection terminal and acts as the effect electrode, its include the tube-shape the cavity, with the cavity is connected and is used for cooperating the cavity with this telescopic electrode installation in the knob of the casing at EEG detection terminal, cavity axial displacement's electrode tip relatively to and be used for making the electrode tip keep away from the reset spring of cavity.

Preferably, the cavity comprises an outer cylinder and an inner cylinder sleeved in the outer cylinder, the inner cylinder can axially move relative to the outer cylinder, one end of the inner cylinder is exposed out of the outer cylinder, and the electrode head is embedded in the exposed end of the inner cylinder; the knob comprises a knob head and a guide post, the knob head is connected with the outer barrel, and the guide post is inserted into the inner barrel and enables the inner barrel to slide axially along the guide post; the reset spring is elastically pressed between the knob head and the inner cylinder.

Preferably, the outer cylinder is provided with a pair of fixed ear plates along the radial direction, and a clamping groove is defined between the fixed ear plates and the knob head and used for clamping the shell when the telescopic electrode is installed on the shell.

Preferably, the end part of the outer cylinder extends inwards to form a stop part; the outer periphery of the inner cylinder is provided with a convex ring, and the convex ring is blocked at the inner side of the blocking part.

Preferably, a partition plate is arranged at one end of the inner cylinder, which penetrates out of the outer cylinder, and the end of the inner cylinder is limited to form an embedding groove, and the partition plate is provided with an seepage hole; the guide post is hermetically connected with the inner cylinder and defines a cavity for storing conductive paste; the electrode tip is embedded in the embedding groove.

Preferably, the end part of the outer cylinder extends inwards to form a stop part, and an abdicating notch is formed in the stop part; the knob head is provided with a clamping block, and the clamping block can enter the outer barrel along the abdicating notch and is blocked at the inner side of the blocking part.

As a second aspect, the utility model discloses still relate to an electroencephalogram detection terminal, include the casing and all locate the effect electrode and the control circuit that casing and electricity are connected, the effect electrode is above-mentioned telescopic electrode.

Preferably, the shell comprises an action electrode part for installing the telescopic electrode, a circuit setting part connected with the action electrode part through a telescopic sleeve and used for setting a control circuit, and a size adjusting part connected with the circuit setting part, wherein the size adjusting part, the action electrode part and the circuit setting part jointly define an annular wearing space and is used for adjusting the size of the wearing space.

Preferably, a plurality of the telescopic electrodes are arranged at intervals on the acting electrode part; the action electrode part is provided with a horizontally extending adjusting groove, and the telescopic electrode penetrates through the adjusting groove and can slide along the adjusting groove.

Preferably, the action electrode part is provided with an installation groove, a top cover magnetically connected with the installation groove is arranged on the action electrode part, and the adjusting groove is arranged in the installation groove.

Compared with the prior art, the utility model discloses a scheme has following advantage:

1. the utility model discloses a telescopic electrode includes cavity, knob, electrode tip and reset spring to make the electrode tip cavity axial displacement relatively, reset spring makes the electrode tip have the driving about of keeping away from the cavity, thereby can follow the relative position between the wide and narrow automatically regulated electrode tip of testee forehead and the cavity, keeps the electrode tip to hug closely the testee forehead skin, guarantees the accuracy of testing result.

2. The utility model discloses an among the telescopic electrode, inject the appearance chamber of storing conductive paste between knob and the cavity to conductive paste can ooze along the clearance of electrode tip and caulking groove along the extrusion of electrode tip, satisfies the coating requirement of conductive paste.

3. The utility model discloses an among the brain electricity test terminal, the position of effect electrode on the casing can be adjusted to can satisfy the testee that the forehead is wide and narrow the size is different and use, increase audience scope, and improve testing result's accuracy.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of an electroencephalogram detection terminal according to an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of the brain electrical detection terminal shown in FIG. 1;

FIG. 3 is a perspective view of the electroencephalogram detection terminal shown in FIG. 1 with a top cover removed, showing the structure of the active electrode part;

fig. 4a is a perspective view of a telescopic electrode according to an embodiment of the present invention;

FIG. 4b is an exploded view of the telescoping electrode of FIG. 4 a;

fig. 4c is a cross-sectional view of the telescoping electrode shown in fig. 4 a.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 to 3, the utility model relates to an electroencephalogram detection terminal 100, including casing 1 and all locate casing 1's response electrode and control circuit, the response electrode is used for gathering testee's EEG signal, control circuit includes the EEG processing module of being connected with the response electrode electricity, and it is used for enlargiing, filtering, analog-to-digital conversion and data preprocessing to the EEG signal that the response electrode gathered to be used for subsequent demonstration, analysis and treatment to use. Wherein the sensing electrode comprises an action electrode for placing at the forehead of the testee and a reference electrode 4 for placing at the mastoid of the testee, and the action electrode is a telescopic electrode 3.

The shell 1 comprises an acting electrode part 11, a circuit setting part 12, a reference electrode part 14 and a size adjusting part 13, wherein the size adjusting part 13, the acting electrode part 11 and the circuit setting part 12 jointly form an annular main body (not numbered, the same below), the annular main body is provided with an annular wearing space 10, and the size of the wearing space 10 can be adjusted through the size adjusting part 13 so as to adapt to testees with different head circumference sizes.

The action electrode part 11 is arranged corresponding to the forehead of the head, and the telescopic electrode 3 is arranged on the action electrode part 11, and the induction part of the telescopic electrode is positioned at the inner side of the annular main body so as to be attached to the forehead skin to induce electroencephalogram signals. The reference electrode part 14 is arranged corresponding to the mastoid, and the reference electrode 4 is arranged on the reference electrode part 14 and used for providing a reference potential, improving the common mode rejection ratio and improving the accuracy of electroencephalogram detection. When one reference electrode 4 is provided, it is used to provide a reference potential, and when two reference electrodes 4 are provided, one is used to provide the reference potential and the other is used to suppress common mode interference. The control circuit is provided in the circuit setting section 12 and is connected to the induction electrodes (the telescopic electrode 3 and the reference electrode 4) through signal lines.

Above say that wear space 10 and refer to the inner space that can supply annular main part to entangle the testee head, because annular main part cover is similar to the head hoop when the testee head, so the utility model discloses an electroencephalogram detection terminal defines for electroencephalogram detection terminal 100.

The utility model discloses an electroencephalogram detection terminal 100, through dividing casing 1 into four kinds of functional units such as action electrode portion 11, circuit setting portion 12, reference electrode portion 14 and size adjustment portion 13, and make four kinds of functional units connect into an entirety, response electrode and control circuit (not shown, the same below) set up in corresponding functional unit, comparatively pleasing to the eye, succinct in appearance; moreover, the wearing space 10 can be adjusted in size through the size adjusting part 13, and the device is suitable for testing testees with different head sizes and has a wide application range.

Referring to fig. 2, preferably, the size adjustment portion 13 is provided with an adjustment assembly 2, which specifically includes a gear 21, a rack 22 and a dial wheel 23, the gear 21 is connected to the housing 1 and can rotate relative to the housing 1, the rack 22 is fixedly connected to the circuit setting portion 12 and is engaged with the gear 21, the dial wheel 23 is fixedly connected to the gear 21 to drive the gear 21 to rotate under the action of an external force, so as to change a horizontal engagement distance between the gear 21 and the rack 22, change a size of the annular main body, and implement size adjustment of the wearing space 10.

Preferably, the circuit setting part 12 and the active electrode part 11 are connected through a telescopic sleeve 15, and the telescopic sleeve 15 is a corrugated sleeve, and the maximum outer diameter of the telescopic sleeve 15 is matched with the size of the active electrode part 11, so that the appearance of the shell 1 is more attractive. By arranging the telescopic sleeve 15 between the circuit setting part 12 and the action electrode part 11, the position between the circuit setting part 12 and the action electrode part 11 can be adjusted, so that the telescopic change can be carried out under the action of the adjusting component 2, and the size adjustment of the wearing space 10 is convenient.

Preferably, the telescopic electrode 3 is detachably provided on the active electrode portion 11, and the telescopic electrode 3 is horizontally movable relative to the housing 1 corresponding to the active electrode portion 11.

Referring to fig. 3, the active electrode portion 11 is horizontally provided with an adjustment groove 112 extending along the length direction of the active electrode portion 11, and the telescopic electrode 3 is inserted into the adjustment groove 112 and can slide relative thereto.

In a better implementation mode, the electroencephalogram signals are acquired by adopting multiple channels, complete waveforms of different brain area positions are obtained simultaneously, and further, the emotion or cognition judgment accuracy of a user is ensured by comparing and correlating basic characteristics of the waveforms of different brain areas.

The number of the telescopic electrodes 3 is three, correspondingly, the action electrode part 11 is arranged in the three adjusting grooves 112 at intervals along the length direction, and the three telescopic electrodes 3 are arranged in the three adjusting grooves 112 in a one-to-one correspondence manner. Therefore, the relative position of the telescopic electrode 3 and the shell 1 can be adjusted according to the width degree of the forehead of the testee, so that the three telescopic electrodes 3 are ensured to be contacted with the skin of the forehead, and the use comfort and the detection precision of the testee are improved.

Further, the action electrode part 11 is provided with an installation groove 111, the adjustment groove 112 is arranged in the installation groove 111, and a top cover (not shown, the same applies below) is covered on the installation groove 111. When the position of the telescopic electrode 3 needs to be adjusted or the telescopic electrode 3 needs to be disassembled and assembled, the top cover can be opened, and then the operation of adjustment or disassembly and assembly is carried out. Wherein, the top cap can be detachably connected with the mounting groove 111 through a magnetic attraction manner.

The reference electrode part 14 is formed by extending the circuit setting part 12 downward, and the reference electrode part 14 is inclined toward the middle of the wearing space 10. The reference electrode portion 14 is opened with an adjustment hole 141 extending in a direction close to the reference electrode portion 14.

The reference electrode 4 penetrates through the adjusting hole and can slide relative to the reference electrode part 14 along the adjusting hole, so that the position of the reference electrode 4 on the reference electrode part 14 can be adjusted, the relative distance between the reference electrode 4 and the telescopic electrode 3 is adjusted, the device is suitable for testers at different mastoid positions, and the application range is enlarged.

In a preferred embodiment, the sensing portions of the telescopic electrode 3 and the reference electrode 4 are both provided with cambered surfaces to enhance the comfort of use when the sensing portions are in contact with the skin of a tested person.

Further, the inner side of the annular main body is provided with a soft leather pad, and the soft leather pad is connected with the acting electrode part 11, the circuit setting part 12 and the size adjusting part 13, so that when the electroencephalogram detection terminal 100 is used, the forehead, the side of the brain and the back of the brain of a human body cannot be in hard contact with the annular main body, and good experience and comfort can be guaranteed when the electroencephalogram detection terminal 100 is used.

Preferably, two circuit setting parts 12 are provided, and are correspondingly connected with two ends of the action electrode part 11 in the length direction. The control circuit further comprises a control module (not shown, the same below), a wireless transmission module, a storage module, a music playing module, a setting control and state prompting module and a power supply module, wherein the wireless transmission module, the storage module, the music playing module, the setting control and state prompting module and the power supply module are all electrically connected with the control module, the wireless transmission module is arranged in one circuit setting part 12 and preferably integrated on one circuit board, and the electroencephalogram processing module is arranged in the other circuit setting part 12 and is electrically connected with the control module. Therefore, the electroencephalogram processing module and other functional circuits of the electroencephalogram detection terminal 100 are respectively arranged in the circuit arrangement parts 12 at two sides, the space of the shell 1 is fully utilized, and the wiring of wires among the functional circuits is facilitated.

The lower surface of the circuit setting part 12 provided with other functional circuits is provided with a USB interface so as to charge and transmit data to the electroencephalogram detection terminal through the interface. In addition, the circuit setting part 12 is further provided with a key electrically connected to the circuit board to realize a control function of the electroencephalogram detection terminal 100.

Referring to fig. 4a to 4c, in a preferred embodiment, the telescopic electrode 3 includes a cavity (not numbered), a knob 32, an electrode head 31 and a return spring 33, the knob is connected to the cavity and is engaged with the cavity to mount the telescopic electrode 3 on the housing 1, the electrode head 31 is connected to the cavity and can move axially relative to the cavity, and the return spring 33 is used to move the electrode head 31 away from the cavity.

The cavity comprises an outer cylinder 30 and an inner cylinder sleeved on the outer cylinder 30.

Two ends of the outer cylinder 30 respectively extend inwards to form a stop portion 302, wherein two abdicating notches 303 are radially arranged on the stop portion 302 at one end, and a pair of fixing ear plates 301 radially extend on the outer periphery of the outer cylinder 30.

The middle portion of the inner cylinder 34 extends outward to form a protruding ring 342, and the inner cylinder 34 is inserted into the outer cylinder 30 in an axially movable manner with one end exposed out of the outer cylinder 30, so that the protruding ring 342 is stopped at the inner side of the stopping portion 302. A partition plate (not shown, the same applies below) is provided in the exposed end of the inner cylinder 34 to form an insertion groove (not shown, the same applies below), and the partition plate is provided with a bleeding hole 341 through which the conductive paste can bleed.

The knob 32 includes a knob head (not shown, the same applies below) and a guide post 320 that are connected to each other. The knob head is used to define a slot (not labeled in fig. 4 c) with the fixing ear plate 301 of the outer cylinder 30 for clamping the housing 1 to fix the telescopic electrode 3 on the active electrode part 11. A pair of fixture blocks 322 are arranged at one end of the guide post 320 close to the knob head, and the fixture blocks 322 can enter the outer barrel 30 through the abdicating notch 303 and are blocked at the inner side of the blocking part 302 by the blocking part 302 after rotating for a certain angle, so that the connection between the knob 32 and the outer barrel 30 is realized; the end of the guide post 320 away from the knob head is inserted into the inner cylinder 34 and is sealingly connected to the inner cylinder 34 to define a cavity 340 for storing conductive paste, and the inner cylinder 34 is axially movable along the guide post 320 relative to the outer cylinder 30. Preferably, an annular groove 321 is formed at an end of the guide post 320 away from the knob head, a sealing ring 35 is sleeved on the annular groove, and the sealing ring 35 is tightly matched with the inner cylinder 34 when the guide post 320 is inserted into the inner cylinder 34, so as to prevent the conductive paste from leaking out of the connection between the knob 32 and the inner and

outer cylinders

34 and 30.

The return spring 33 is biased between the knob 32 and the inner barrel 34 to return the inner barrel 34 when the force on the inner barrel 34 is lost or reduced.

The electrode tip 31 is embedded in the embedding groove. Preferably, the base material of the electrode head 31 is aluminum, and the surface of the electrode head can be provided with a gold-plated coating, so that the electrode head has good conductivity and oxidation resistance, and the service life of the electrode is prolonged; and the electrode tip 31 is provided in the form of an inwardly concave spherical surface, which can increase comfort and ensure good contact with the scalp or forehead skin.

Therefore, when the electroencephalogram detection terminal 100 is worn, the electrode head 31 moves towards the outer cylinder 30 under the action of the forehead of a testee to press the inner cylinder 34, so that axial displacement is generated between the inner cylinder 34 and the guide post 320, the conductive paste in the cavity 340 seeps out of the seepage hole and is extruded out through the gap between the electrode head 31 and the caulking groove, and therefore the extrusion amount of the conductive paste stored in the electrode cavity can be controlled through the extrusion of the forehead and the electrode head 31. Therefore, when a testee finds that the extrusion amount of the conductive paste is inappropriate when using the electroencephalogram detection terminal 100, the conductive paste does not need to be taken off specially for adjustment, the use is more convenient and humanized, the experience degree of a user is improved, the quality of the acquired electroencephalogram signal is ensured to be better, and the follow-up analysis and related processing are facilitated.

Since the telescopic electrode 3 of the present embodiment is detachably connected to the housing 1, it can be detached from the active electrode portion 11 to clean, replace, or add a conductive paste to the electrode. When the telescopic electrode 3 needs to be detached from the housing 1, the telescopic electrode 3 can be taken out from the action electrode part 11 by screwing the telescopic electrode 3 and rotating the fixing lug plate 301 to the horizontal direction, namely corresponding to the adjusting groove 112. The telescopic electrode is inserted into the action electrode part by the fixing lug plate 301 corresponding to the adjusting groove 112, and the fixing lug plate 301 is twisted to be dislocated with the adjusting groove 112, so that the telescopic electrode 3 and the shell can be fixed, and the assembly is convenient and rapid.

The telescopic electrode 3 can also be used as a dry electrode, and in the using process, the electrode tip automatically adjusts the relative distance between the electrode tip and the cavity along with the difference of the width of the forehead of the testee under the action of the return spring, and keeps clinging to the forehead skin of the testee, thereby ensuring the accuracy of the detection result.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a telescopic electrode, is applicable to the EEG detection terminal and acts as the effect electrode, its characterized in that, including the cavity of tube-shape, with the knob that the cavity is connected and be used for cooperating the cavity to install this telescopic electrode in the casing at EEG detection terminal, electrode tip that can relative cavity axial displacement to and be used for making the electrode tip keep away from the reset spring of cavity.

2. The telescopic electrode according to claim 1, wherein the cavity comprises an outer cylinder and an inner cylinder sleeved in the outer cylinder, the inner cylinder is axially movable relative to the outer cylinder and one end of the inner cylinder is exposed out of the outer cylinder, and the electrode head is embedded in the exposed end of the inner cylinder;

the knob comprises a knob head and a guide post, the knob head is connected with the outer barrel, and the guide post is inserted into the inner barrel and enables the inner barrel to slide axially along the guide post;

the reset spring is elastically pressed between the knob head and the inner cylinder.

3. The retractable electrode of claim 2 wherein the outer barrel is provided with a pair of radially extending fixed lugs defining a slot with the knob head for holding the housing when the retractable electrode is mounted to the housing.

4. The telescopic electrode of claim 2, wherein the end of the outer barrel extends inwardly to form a stop; the outer periphery of the inner cylinder is provided with a convex ring, and the convex ring is blocked at the inner side of the blocking part.

5. The telescopic electrode according to claim 2, wherein a partition plate is arranged at one end of the inner cylinder, which penetrates out of the outer cylinder, so that the end of the inner cylinder defines an embedded groove, and the partition plate is provided with seepage holes;

the guide post is hermetically connected with the inner cylinder and defines a cavity for storing conductive paste;

the electrode tip is embedded in the embedding groove.

6. The telescopic electrode according to claim 2, wherein the end of the outer cylinder is provided with a stop part extending inwards, and the stop part is provided with an abdicating notch;

the knob head is provided with a clamping block, and the clamping block can enter the outer barrel along the abdicating notch and is blocked at the inner side of the blocking part.

7. An electroencephalogram detection terminal, which comprises a shell, and an action electrode and a control circuit which are arranged on the shell and electrically connected, and is characterized in that the action electrode is the telescopic electrode as claimed in any one of claims 1 to 6.

8. The electroencephalogram detection terminal according to claim 7, wherein the housing comprises an action electrode part for mounting the telescopic electrode, a circuit setting part connected with the action electrode part through a telescopic sleeve and used for setting a control circuit, and a size adjusting part connected with the circuit setting part, wherein the size adjusting part, the action electrode part and the circuit setting part jointly define an annular wearing space and is used for adjusting the size of the wearing space.

9. The electroencephalogram detection terminal according to claim 8, wherein a plurality of the telescopic electrodes are arranged at intervals on the active electrode part; the action electrode part is provided with a horizontally extending adjusting groove, and the telescopic electrode penetrates through the adjusting groove and can slide along the adjusting groove.

10. The electroencephalogram detection terminal according to claim 9, wherein the action electrode part is provided with an installation groove, a top cover magnetically connected with the installation groove is arranged on the action electrode part, and the adjusting groove is arranged in the installation groove.