CN215348991U

CN215348991U - Electrode adjusting device and dry electrode electroencephalogram cap

Info

Publication number: CN215348991U
Application number: CN202121871292.8U
Authority: CN
Inventors: 裴为华; 查爱华; 章祥; 闫玉庆; 陈茹茹
Original assignee: Jiangsu Jicui Brain Machine Integration Intelligent Technology Research Institute Co Ltd
Current assignee: Suzhou Yiyiji Technology Co.,Ltd.
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2021-12-31
Anticipated expiration: 2031-08-11

Abstract

The utility model discloses an electrode adjusting device and a dry electrode electroencephalogram cap. The shell is provided with an installation cavity in a penetrating way. The adjusting component comprises a supporting structure and a knob structure, the supporting structure is movably arranged in the mounting cavity, the knob structure acts on the supporting structure, one end of the supporting structure is provided with an open accommodating cavity, the knob structure is partially arranged in the mounting cavity and is in threaded connection with the side wall of the mounting cavity, and the knob structure can drive the supporting structure to rotate and move in the mounting cavity. The electrode structure is movably arranged at the open end of the accommodating cavity, part of the electrode structure is arranged to be convex to the surface of the shell, and the electrode structure is elastically connected with the accommodating cavity through a first elastic piece. The dry electrode brain cap can adjust the position of the electrode and the size of the brain cap according to the head shape of a testee, so that the electrode is in contact with the scalp with proper pressure, and the comfortable feeling of the testee is ensured while good signal acquisition is ensured.

Description

Electrode adjusting device and dry electrode electroencephalogram cap

Technical Field

The utility model relates to the technical field of an electrode device and an electroencephalogram cap, in particular to an electrode adjusting device and a dry electrode electroencephalogram cap.

Background

The electroencephalogram cap is a wearable device which can be assembled with an electroencephalogram collecting electrode and can be stably placed on the head. The common electroencephalogram cap is an elastic fabric electroencephalogram cap used in cooperation with a wet electrode. When the electroencephalogram cap is used, sufficient conductive paste is required to be injected into the reserved holes of the electrodes one by one to eliminate the obstruction of hairs to form a lower electrode/tissue impedance interface, although the wet electrode electroencephalogram cap is still widely used, the following defects exist during use:

firstly, the wearing and gluing of the wet electrode brain electricity cap requires the operation of professional personnel, the process is time-consuming and labor-consuming, the injection process of the conductive paste is long, the residues bring inconvenience to users and the maintenance of the electrodes, and the daily application is not facilitated; secondly, the conductive paste dries out over time, which increases the interface impedance and is not suitable for long-term electroencephalogram monitoring.

The dry electrode is a novel sensing technology developed and formed aiming at the defects of the wet electrode, can be directly contacted with the scalp without matching with a conductive paste, is worn and used, does not need to be cleaned after being used, and is a key technology of wearable electroencephalogram technologies such as brain state monitoring and brain-computer interface technologies, and the like, which is going to practical application.

Compared with a wet electrode, the dry electrode does not have the assistance of a conductive paste, and the electrode body needs to be in direct contact with the scalp. The contact impedance depends on the conductive material of the electrode on one hand and the fixing device of the electrode on the other hand, and the stable and reliable fixing structure not only can enable the electrode to smoothly penetrate through hair to contact the scalp, but also can provide stable pressure for the electrode to form a good contact interface.

The existing dry electrode electroencephalogram cap fixing structure is relatively heavy and complex, has large inertia in a motion state, is easy to generate sliding displacement with the scalp when the head moves, and causes signal quality reduction, and a subject feels uncomfortable and cannot monitor for a long time because the dry electrode is directly pressed on the scalp.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electrode adjusting device and a dry electrode electroencephalogram cap, which can adjust the position of an electrode and the size of the electroencephalogram cap according to the head shape of a subject, so that the electrode is in contact with the scalp with proper pressure, good signal acquisition is ensured, and the comfortable feeling of the subject is ensured.

To achieve the above object, the present invention provides an electrode adjustment device, which includes a housing, an adjustment assembly, and an electrode structure.

The shell is provided with an installation cavity in a penetrating mode.

The adjusting part including the activity set up in bearing structure in the installation cavity and act on bearing structure's knob structure, bearing structure has one end and is the open chamber of acceping that sets up, knob structure part set up in the installation cavity and with threaded connection between the lateral wall of installation cavity, the knob structure can drive bearing structure is in installation cavity internal rotation and removal.

The electrode structure is movably arranged at the open end of the accommodating cavity, part of the electrode structure is arranged to be protruded out of the surface of the shell, and the electrode structure is elastically connected with the accommodating cavity through a first elastic piece.

In one or more embodiments, the knob structure includes a knob body and a connecting member, the connecting member is in threaded connection with a side wall of the mounting cavity, the knob body penetrates through the connecting member and is axially movable relative to the connecting member, a free end of the knob body is configured to be a prismatic structure, and a first limiting cavity matched with the free end is formed in one side of the connecting member.

In one or more embodiments, the supporting structure includes a supporting seat and a supporting member, the supporting seat is elastically connected to the mounting cavity, the supporting seat has a first raised annular step portion, the supporting member is fixed to the first raised annular step portion, and the receiving cavity is formed in the supporting member.

In one or more embodiments, a second limiting cavity is formed in a side of the supporting seat, which is in contact with the knob structure, the shape of the second limiting cavity is matched with the shape of the free end of the knob body, and the knob body can move in the connecting piece so that the free end of the knob body can be switchably configured in the first limiting cavity or the second limiting cavity, so as to drive the connecting piece to move spirally or drive the supporting structure to drive the electrode structure to rotate.

In one or more embodiments, a first abutting cavity is formed in the supporting seat in the first annular step portion, one end of the first elastic element is disposed in the first abutting cavity, and the other end of the first elastic element abuts against the electrode structure.

In one or more embodiments, a second annular step portion is formed at an open end of the receiving cavity of the supporting member, and the electrode structure is abutted against the second annular step portion under the action of the first elastic member.

In one or more embodiments, the receiving cavity is configured as a prismatic structure.

In one or more embodiments, the electrode structure includes a fixing member, an electrode holder, and an electrode, the fixing member is configured as a prismatic structure adapted to the accommodating cavity, a third annular step portion adapted to the second annular step portion is disposed on the fixing member, the electrode holder is fixed in the fixing member, and the electrode is detachably mounted in the electrode holder.

In one or more embodiments, the housing is provided with a gasket on a side surface thereof on which the electrode structure is provided.

In another aspect, the utility model also provides a dry electrode brain wave cap which comprises a head ring provided with a plurality of the electrode adjusting devices which are arranged in a connected mode.

In one or more embodiments, the headgear includes:

an arc-shaped fixing part;

the movable part is formed by hinging a plurality of electrode adjusting devices; and

the telescopic adjusting structure is arranged between the movable part and the fixed part, and the telescopic adjusting structure is rotatably connected with the fixed part and hinged with the movable part.

In one or more embodiments, the telescopic adjustment structure includes a first adjustment portion and a second adjustment portion slidably connected to each other, and a control portion acting on the first adjustment portion and the second adjustment portion to fix the first adjustment portion and the second adjustment portion relative to each other.

In one or more embodiments, the first adjusting portion has an adjusting tongue, at least one side of which parallel to the sliding direction is configured in a rack-like structure,

the second adjusting part is provided with a built-in cavity for accommodating the adjusting tongue, the adjusting tongue can be inserted into the built-in cavity and can be controlled to move in the built-in cavity,

the control part comprises an engaging part which is arranged in the built-in cavity and is matched with the rack of the adjusting tongue and a button which is movably arranged on the second adjusting part, extends into the built-in cavity and is fixedly connected with the engaging part, and the button is elastically connected with the second adjusting part through a fourth elastic piece.

In one or more embodiments, a signal amplifier is disposed on the fixed portion, and the signal amplifier is electrically connected with the electrode structure in the electrode adjusting device.

In one or more embodiments, the movable portions are movably connected to two ends of the fixed portion through the telescopic adjusting structure, and the telescopic adjusting structure is coupled to the fixed portion.

Compared with the prior art, the electrode adjusting device adopts the adjustable elastic electrode structure, and the electrode structure can rotate and stretch, so that the electrode structure can contact the scalp with proper pressure, and the comfortable feeling of a testee is ensured while good signal acquisition is ensured.

The dry electrode electroencephalogram cap adopts a light head ring style, so that the weight of the electroencephalogram cap is reduced; the size of the head ring can be adjusted through the telescopic adjusting structure, and the head ring is suitable for head circumference of most people; by arranging the electrode adjusting device, the electrode is in contact with the scalp with proper pressure, so that the comfortable feeling of a testee is ensured while good signal acquisition is ensured.

Drawings

Fig. 1 is a perspective view of a dry electrode brain cap according to an embodiment of the present invention.

Fig. 2 is a perspective view of a telescopic adjustment structure according to an embodiment of the present invention.

Fig. 3 is a first adjustment unit configuration diagram of the telescopic adjustment structure according to the embodiment of the present invention.

Fig. 4 is a structural view (one surface thereof is omitted) of a second adjustment portion of the telescopic adjustment structure according to the embodiment of the present invention.

Fig. 5 is a structural view of a control unit of the telescopic adjustment structure according to the embodiment of the present invention.

Fig. 6 is a perspective view of an electrode adjustment device according to an embodiment of the present invention.

Fig. 7 is a sectional view of an electrode adjustment apparatus according to an embodiment of the present invention.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in FIG. 1, an embodiment of the present invention provides a dry electrode brain electric cap, which comprises an arc-shaped fixing portion 10, a telescopic adjusting structure 20, an electrode adjusting device 30 and a signal amplifier 40. The plurality of electrode adjustment structures 30 are hinged to each other to form a rotatably adjustable movable portion 50. The two ends of the movable part 50 are respectively connected with the arc-shaped fixing part 10 through the telescopic adjusting structures 20 to form a head ring structure. The signal amplifier 40 is fixedly arranged on the arc-shaped fixing part 10, and each electrode adjusting structure 30 is in signal connection or electric connection with the signal amplifier 40.

In one embodiment, two sets of movable portions 50 are disposed on the arc-shaped fixing portion 10, and the two ends of the two sets of movable portions 50, and the movable portion 50 and the arc-shaped fixing portion 10 can be rotatably connected.

The telescopic adjusting structure 20 is disposed between the movable portion 50 and the arc-shaped fixing portion 10, and the telescopic adjusting structure 20 is coupled to the arc-shaped fixing portion 10 and hinged to the movable portion 50.

As shown in fig. 2, the telescopic adjusting structure 20 includes a first adjusting portion 21 and a second adjusting portion 22 slidably connected to each other, and a control portion 23 acting on the first adjusting portion 21 and the second adjusting portion 22 to fix the two portions relative to each other.

As shown in fig. 3 to 5, the first adjustment portion 21 has an integrally formed stopper portion 211 and an adjustment tongue 212, and a width h1 of the stopper portion 211 is greater than a width h2 of the adjustment tongue 212. One side of the adjustment tongue 212 parallel to the sliding direction is configured in a rack-like structure. The second adjusting portion 22 has a built-in cavity 221 for accommodating the adjusting tongue 212, the second adjusting portion 22 has a built-in cavity opening 222, and the length of the built-in cavity opening 222 is smaller than the width of the limiting portion 211. The adjustment tongue 212 is insertable into the interior cavity 221 from the interior cavity opening 222 and is movable or fixed within the interior cavity 221 under the control of the control portion 23. The second adjustment part 22 is provided with a mounting part 223 at the built-in cavity opening 222, and the control part 23 is provided on the mounting part 223.

The control unit 23 includes a tooth-engaging portion 231 and a button 232. The button 232 is disposed in the mounting portion 223 and elastically and movably connected to the mounting portion 223 by a spring. The tooth-engaging portions 231 are provided in the built-in cavity 221 and fix the connection button 232. The engaging portion 231 is provided with a engaging structure adapted to the rack of the adjusting tongue 212. After the button 232 is pressed outside the second adjusting part 22, the tooth-engaging part 231 is separated from the rack on the adjusting tongue 212, the first adjusting part 21 or the second adjusting part 22 is moved, the direct distance between the two parts is adjusted to meet the head circumference of the subject, the button 232 is released, the tooth-engaging part 231 is engaged with the rack on the adjusting tongue 212 under the action of the spring, and the first adjusting part 21 and the second adjusting part 22 are relatively fixed.

As shown in fig. 1, the signal amplifier 40 may be connected to each electrode adjustment device 30 through a built-in wire, and transmit the collected electrode signals to a terminal device for analysis processing through a network, bluetooth, or the like.

As shown in fig. 6 and 7, the electrode adjustment device 30 includes a housing 31, an adjustment assembly 32, and an electrode structure 33.

The housing 31 is used for placing the adjusting component 32 and the electrode structure 33, and the housing 31 is provided with a mounting cavity 311 in a penetrating manner.

The adjusting assembly 32 includes a supporting structure 321 movably disposed in the mounting cavity 311 and a knob structure 322 acting on the supporting structure 321, wherein the knob structure 322 can drive the supporting structure 321 to rotate and move in the mounting cavity 311.

The knob structure 322 includes a knob body 3221 and a connecting member 3222, the connecting member 3222 is in threaded connection with the upper portion of the side wall of the mounting cavity 311, the knob body 3221 is disposed through the connecting member 3222 and can move axially relative to the connecting member 3222, the knob body 3221 has a holding portion and a free end which are disposed oppositely, the free end is configured to be a prismatic structure or the free end is fixed with a prismatic block, and a first limiting cavity 32221 matched with the free end is disposed at one side of the connecting member 3222.

The supporting structure 321 includes a supporting seat 3211 and a supporting member 3212, and the supporting seat 3211 is elastically connected to the mounting cavity 311 through a spring.

A second limiting cavity 32111 is formed in one side of the supporting seat 3211, which is in contact with the knob structure 322, the shape of the second limiting cavity 32111 matches the shape of the free end of the knob body 3221, and the knob body 3221 can move in the connecting element 3222 so that the free end of the knob body can be switched and disposed in the first limiting cavity 32221 or the second limiting cavity 32111, so as to drive the connecting element 3222 to move spirally or drive the supporting structure 321 to drive the electrode structure 33 to rotate.

The supporting seat 3211 has a raised first annular step portion 32112, the supporting element 3212 is fixedly sleeved on the first annular step portion 32112, an accommodating cavity 32121 is formed in the supporting element 3212, and the accommodating cavity 32121 is configured as a prismatic structure and is used for mounting the electrode structure 33. The supporting seat 3211 forms a first abutting cavity 32113 in the first annular step 32112. The electrode structure 33 is elastically connected to the first abutting cavity 32113 through a spring. Specifically, one end of the spring is disposed in the first abutting cavity 32113, and the other end abuts against the electrode structure 33. The supporting member 3212 may have a second annular step 32122 formed at an open end of the accommodating cavity 32121, and the electrode structure 33 may be supported by the second annular step 32122 under the action of the spring.

A connecting piece 3223 is further disposed between the first abutting cavity 32113 and the spring. An opening is formed in the first annular step portion 32112, a connecting piece 3223 extends into the housing 31 from the opening, the connecting piece is used for connecting a signal line, and correspondingly, a wiring hole is also formed in the housing 31.

The electrode structure 33 is movably disposed at the open end of the accommodating cavity 32121, and a portion of the electrode structure protrudes from the surface of the housing 31. The electrode structure 33 includes a fixing member 331, an electrode holder 332, and an electrode 333. The fixing member 331 is configured as a prismatic structure adapted to the accommodating cavity 32121, and a third annular step portion adapted to the second annular step portion 32122 is disposed on the fixing member 331. The electrode holder 332 is fixed in the fixing member 331, and the electrode 333 is detachably engaged with the electrode holder 332.

The shell 31 is provided with a flexible gasket 312 on the surface of one side provided with the electrode structure 33, so that the comfort of contact between the electroencephalogram cap and the scalp is improved.

The utility model provides a dry electrode electroencephalogram cap structure, wherein an electrode adjusting device is fixed by using the style of an adjustable head ring, and meanwhile, the electrode adjusting device is designed with the telescopic adjusting function of the electrode structure.

When the dry electrode electroencephalogram cap is used, the head ring is sleeved on the head of a subject, the positions among the movable parts are adjusted, and the size of the head ring is adjusted through the telescopic adjusting structure, so that the head ring can be firmly and comfortably fixed on the head of the subject. After the head ring is fixed, the knob body on the electrode adjusting device is adjusted again to adjust the depth of the electrode structure, so that the electrode structure can well press the contact skin, the spring between the electrode structure and the supporting seat ensures the proper edge degree required by the electrode to contact the scalp, the pressure is not too small, the contact is not good, the pressure is not too large, and discomfort is brought to a testee. Each electrode can be connected to a signal amplifier (electrode, electrode holder, spring, electric conduction or signal conduction between connecting sheets) through a built-in lead (through the connecting sheet), and the signal amplifier transmits the acquired signals to terminal equipment for analysis and processing in a network, Bluetooth and other modes.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the utility model and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the utility model and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims

1. An electrode conditioning device, comprising:

the shell is provided with a mounting cavity in a penetrating way;

the adjusting assembly comprises a supporting structure movably arranged in the mounting cavity and a knob structure acting on the supporting structure, the supporting structure is provided with an accommodating cavity with one open end, the knob structure is partially arranged in the mounting cavity and is in threaded connection with the side wall of the mounting cavity, and the knob structure can drive the supporting structure to rotate and move in the mounting cavity; and

2. The electrode adjustment device of claim 1, wherein the knob structure comprises a knob body and a connecting member, the connecting member is in threaded connection with the side wall of the mounting cavity, the knob body is disposed through the connecting member and can move axially relative to the connecting member, the free end of the knob body is configured to be a prismatic structure, and a first limiting cavity matched with the free end is formed in one side of the connecting member.

3. The electrode conditioner of claim 2, wherein the support structure includes a support base and a support member, the support base is elastically connected to the mounting cavity, the support base has a first raised annular step, the support member is fixed to the first raised annular step, and the receiving cavity is formed in the support member.

4. The electrode adjustment apparatus of claim 3, wherein a second limiting cavity is formed on a side of the support base contacting the knob structure, the shape of the second limiting cavity matches the shape of the free end of the knob body, and the knob body is movable in the connecting member such that the free end of the knob body can be switched and disposed in the first limiting cavity or the second limiting cavity to drive the connecting member to move spirally or drive the support structure to rotate the electrode structure.

5. The electrode adjustment apparatus of claim 3, wherein the support seat has a first abutting cavity formed in the first annular step portion, one end of the first elastic member is disposed in the first abutting cavity, and the other end abuts against the electrode structure.

6. The electrode adjustment apparatus of claim 5, wherein the support member has a second annular step portion formed at an open end of the receiving cavity, and the electrode structure is supported against the second annular step portion by the first elastic member.

7. A dry electrode brain wave cap, which is characterized by comprising a head ring provided with a plurality of electrode adjusting devices according to any one of claims 1 to 6, which are connected.

8. The dry electrode brain wave cap of claim 7, wherein the headring comprises:

an arc-shaped fixing part;

9. The dry electrode brain cap of claim 8, wherein the telescoping adjustment structure comprises a first adjustment portion and a second adjustment portion slidably coupled to each other, and a control portion acting on the first adjustment portion and the second adjustment portion to effect relative fixation therebetween.

10. The dry electrode brain cap of claim 9,

the first adjusting portion has an adjusting tongue, at least one side of which parallel to the sliding direction is configured into a rack-like structure,