Dry electrode fixing device applied to electroencephalogram amplifier
The design of the ring-shaped elastic buckle and retaining ring solves the problem of inconvenience in replacement and maintenance caused by the fixed connection of dry electrodes, realizes the detachable connection of dry electrodes, and improves the efficiency of use and the accuracy and comfort of signal acquisition.
Patent Information
- Application Number
- CN202422553463.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-10-22
AI Technical Summary
Most of the dry electrodes used in existing EEG amplifiers are fixed connections, which makes them inconvenient to replace, difficult to maintain, and lacks flexibility, affecting the accuracy and comfort of signal acquisition.
The design employs a ring-shaped elastic buckle and retaining ring to enable a detachable connection between the dry electrode and the back of the EEG amplifier base. The ring-shaped elastic buckle is made of metal materials such as alloy spring steel or chrome vanadium steel, combined with a limiting ring sleeve to ensure the elastic deformation and fixation effect of the retaining ring.
It enables simple and quick installation and disassembly of dry electrode modules, reduces usage costs and maintenance difficulty, adapts to the personalized needs of different testers, and improves the accuracy and comfort of signal acquisition.
Smart Images
Figure CN223569322U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to signal processing equipment technical field, especially, a kind of dry electrode fixing device applied to electroencephalograph.[A1] BACKGROUND
[0002] As an important technical means for detecting the spontaneous electrical activity of the brain, electroencephalogram (EEG) has been widely used in medical, scientific research and neuroscience fields. In the EEG measurement process, the electrode, as the key component connecting the brain and the measurement device, directly affects the quality and reliability of the signal. Although the traditional wet electrode has good conductivity by contacting the scalp with conductive paste or gel, it has the disadvantages of inconvenience in use and difficulty in cleaning residual materials. Therefore, the dry electrode, which does not require a conductive medium and is easy to clean and reuse, has gradually become the mainstream choice for EEG measurement.
[0003] However, the dry electrodes used in existing electroencephalographs are mostly fixedly connected, i.e., the dry electrode and the amplifier are directly fixed together and cannot be detached or replaced. Although this design simplifies the manufacturing process, it has many inconveniences in actual application:
[0004] 1. Inconvenient to replace: when the dry electrode is damaged or its performance decreases, the entire electroencephalograph needs to be replaced, increasing the use cost and maintenance difficulty.
[0005] 2. Difficult to repair: if the amplifier cannot work normally due to dry electrode failure, professional personnel often need to disassemble it during maintenance, increasing the repair time and cost.
[0006] 3. Poor flexibility: different testers have different head sizes and shapes, and the fixedly connected dry electrode is difficult to adapt to individual needs, affecting the accuracy and comfort of signal acquisition INVENTION CONTENTS
[0007] To solve the problem of inconvenient replacement of the dry electrode used in the electroencephalograph, the utility model aims to provide a dry electrode fixing device applied to electroencephalograph.
[0008] To achieve the above utility model purposes, the utility model adopts the following technical solutions:
[0009] The dry electrode fixing device applied to the electroencephalograph is provided with a mounting end in a cylindrical structure with a small middle part and a large head end, and a smooth transition connection between the middle part and the head end of the mounting end, and the dry electrode fixing device comprises a ring-shaped elastic buckle arranged on the back of the base of the electroencephalograph, the ring-shaped elastic buckle is in a cylindrical structure with openings at both ends, the inner diameter of the opening at the top of the ring-shaped elastic buckle is larger than the outer diameter of the head end of the mounting end of the dry electrode, and a clasp ring is arranged in a ring shape at the opening at the top of the ring-shaped elastic buckle, the inner diameter of the clasp ring is larger than the outer diameter of the middle part of the mounting end of the dry electrode and smaller than the outer diameter of the head end of the mounting end under the condition of no external force, and the head end of the mounting end of the dry electrode is in contact with the transition zone of the middle part and the head end of the mounting end when being located in the ring-shaped elastic buckle.
[0010] The basic principle of the dry electrode fixing device applied to the electroencephalograph in the utility model is that when the dry electrode is mounted on the back of the base of the electroencephalograph, the mounting end of the dry electrode is directly inserted into the clasp ring and mounted in the ring-shaped elastic buckle, the clasp ring is expanded in the process of inserting the mounting end of the dry electrode into the clasp ring, the transition zone of the middle part and the head end of the mounting end is in contact with the clasp ring after the mounting end of the dry electrode moves to a specified stroke, and thus the whole dry electrode is fixedly mounted on the back of the base of the electroencephalograph.
[0011] Further, the material of the ring-shaped elastic buckle is metal, which can transmit the electroencephalogram signals collected by the dry electrode, and the metal can be made of alloy spring steel or chrome vanadium steel, etc., such materials not only have good elasticity, but also have high strength and fatigue strength, thereby prolonging the service life of the ring-shaped elastic buckle.
[0012] Further, the ring-shaped elastic buckle is provided below with a conductive column, and the top of the conductive column is fixedly connected with the bottom of the ring-shaped elastic buckle. The conductive column not only fixes the bottom of the ring-shaped elastic buckle, but also transmits the electroencephalogram signals collected by the dry electrode to the base of the electroencephalograph.
[0013] Further, the ring-shaped elastic buckle is provided peripherally with a limiting ring sleeve in a hollow cylindrical structure with a closed top and an open bottom, the top of the limiting ring sleeve is provided with a circular hole through which the head end of the mounting end of the dry electrode passes, a circular limiting groove is arranged at the center of the top inner end face of the limiting ring sleeve, the center line of the circular limiting groove coincides with the center line of the clasp ring, the clasp ring is arranged in the circular limiting groove, the outer diameter of the clasp ring is smaller than the diameter of the circular limiting groove under the condition of no external force, and the outer side of the clasp ring is in contact with the side wall of the circular limiting groove after the clasp ring is expanded under stress. The circular limiting groove in the limiting ring sleeve is arranged to limit the diameter of the clasp ring and the opening at the top of the ring-shaped elastic buckle after being expanded under stress, so as to avoid plastic deformation of the clasp ring and the opening at the top of the ring-shaped elastic buckle caused by excessive expansion of the clasp ring and the opening at the top of the ring-shaped elastic buckle, and improve the service life of the clasp ring and the ring-shaped elastic buckle.
[0014] The utility model discloses a beneficial effect is: the utility model discloses a kind of dry electrode fixing device applied to electroencephalograph, by setting annular elastic buckle and snap ring and using the elastic deformation of both, realize dry electrode and the detachable connection of electroencephalograph base back, so that the installation and disassembly process of dry electrode module is more simple and fast, improve use efficiency.When dry electrode is damaged or needs to be replaced, user can easily complete operation, without replacing entire electroencephalograph, reduce use cost and maintenance difficulty;Dry electrode can be replaced and adjusted according to the head size and shape of different testers, to adapt to individual needs, improve the accuracy and comfort of signal acquisition. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 It is assembly structure diagram for dry electrode and dry electrode fixing device.
[0016] Fig. 2 It is three-dimensional structure schematic diagram for dry electrode fixing device and dry electrode.
[0017] Among them, 1, electroencephalograph base;2, dry electrode fixing device;3, dry electrode;4, dry electrode installation end;5, annular elastic buckle;6, snap ring;7, conductive column;8, limit ring cover;9, round hole;10, circular limit slot. DETAILED DESCRIPTION
[0018] The specific embodiments of the utility model are described below, so that the person skilled in the art can understand the utility model, but it should be clear that the utility model is not limited to the scope of specific embodiments, for the person skilled in the ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, all the invention and creation using the concept of the utility model are within the scope of protection.
[0019] As Figs. 1-2 Indicated, the utility model provides a kind of dry electrode fixing device 2 applied to electroencephalograph, and the dry electrode installation end 4 is the cylindrical structure of middle small, head end big, and installation end middle part is smoothly connected between installation end head end, the dry electrode fixing device 2 includes the annular elastic buckle 5 being set to the back of electroencephalograph base 1, and the annular elastic buckle 5 is the cylindrical structure with opening at both ends, and the inner diameter of annular elastic buckle 5 top opening is greater than the outer diameter of dry electrode installation end 4 head end, and annular elastic buckle 5 top opening is provided with snap ring 6, and under no external force, the inner diameter of snap ring 6 is greater than the outer diameter of dry electrode installation end 4 middle part, and less than the outer diameter of dry electrode installation end 4 head end;When dry electrode installation end 4 head end is located in annular elastic buckle 5, snap ring 6 and installation end middle part and installation end head end transition zone are clamped contact.
[0020] Specifically, the material of the annular elastic buckle 5 is metal, which can transmit the brain electrical signals collected by the dry electrode 3. The metal can be made of alloy spring steel or chromium vanadium steel, etc. Such materials not only have good elasticity, but also have high strength and fatigue strength, thereby prolonging the service life of the annular elastic buckle 5.
[0021] When the dry electrode 3 is installed on the back of the EEG amplifier base 1, the dry electrode installation end 4 is directly inserted into the clasp ring 6 installed in the annular elastic buckle 5. During the process of inserting the dry electrode installation end 4 into the clasp ring 6, the clasp ring 6 is expanded, and after the dry electrode installation end 4 moves to the specified stroke, the transition zone between the middle part and the head end of the installation end is in contact with the clasp ring 6, thereby fixing and installing the entire dry electrode 3 on the back of the EEG amplifier base 1. By using the elastic deformation of the annular elastic buckle 5 and the clasp ring 6, the dry electrode 3 is detachably connected with the back of the EEG amplifier base 1, so that the installation and disassembly process of the dry electrode 3 module is more simple and fast, and the use efficiency is improved. When the dry electrode 3 is damaged or needs to be replaced, the user can easily complete the operation without replacing the entire EEG amplifier, thereby reducing the use cost and maintenance difficulty; the dry electrode 3 can be replaced and adjusted according to the head size and shape of different testers to adapt to individual needs, thereby improving the accuracy and comfort of signal collection
[0022] The annular elastic buckle 5 is provided below with a conductive column 7, and the top of the conductive column 7 is fixedly connected with the bottom of the annular elastic buckle 5. The conductive column 7 not only fixes the bottom of the annular elastic buckle 5, but also transmits the brain electrical signals collected by the dry electrode 3 to the EEG amplifier base 1.
[0023] Preferably but not limitedly, the annular elastic buckle 5 is provided peripherally with a limiting ring sleeve 8, which has a hollow cylindrical structure with a closed top and an open bottom. The limiting ring sleeve 8 is provided at the top with a circular hole 9 through which the head end of the dry electrode installation end 4 passes. The top inner end surface of the limiting ring sleeve 8 is provided at the center with a circular limiting groove 10, and the center line of the circular limiting groove 10 coincides with the center line of the clasp ring 6. The clasp ring 6 is arranged in the circular limiting groove 10. Under the condition of no external force, the outer diameter of the clasp ring 6 is smaller than the diameter of the circular limiting groove 10. After the clasp ring 6 is expanded under stress, the outer side of the clasp ring 6 is in contact with the side wall of the circular limiting groove 10. The circular limiting groove 10 in the limiting ring sleeve 8 is used to limit the diameter of the clasp ring 6 and the top opening of the annular elastic buckle 5 after being expanded under stress, so as to avoid plastic deformation of the clasp ring 6 and the annular elastic buckle 5 caused by excessive expansion of the top opening of the clasp ring 6 and the annular elastic buckle 5, thereby improving the service life of the clasp ring 6 and the annular elastic buckle 5.
Claims
1. A dry electrode fixing device applied to a brain electric amplifier, a mounting end of the dry electrode is in a cylindrical structure with a small middle part and a large head end, and a smooth transition connection is formed between the middle part and the head end of the mounting end, characterized in that, The dry electrode fixing device comprises a ring-shaped elastic buckle arranged on the back of the electroencephalogram amplifier base, the ring-shaped elastic buckle has a cylindrical structure with openings at both ends, the inner diameter of the opening at the top of the ring-shaped elastic buckle is larger than the outer diameter of the dry electrode mounting end head, a snap ring is arranged annularly at the opening at the top of the ring-shaped elastic buckle, the inner diameter of the snap ring is larger than the outer diameter of the middle part of the dry electrode mounting end and smaller than the outer diameter of the dry electrode mounting end head under the condition of no external force, and the dry electrode mounting end head is located in the ring-shaped elastic buckle, and the snap ring is in clamping contact with the transition zone between the middle part and the head end of the mounting end.
2. The dry electrode fixation device for electroencephalograph amplifier according to claim 1, wherein The material of the ring-shaped elastic buckle is metal.
3. The dry electrode fixation device for electroencephalograph amplifier according to claim 2, wherein A conductive column is arranged below the ring-shaped elastic buckle, and the top of the conductive column is fixedly connected with the bottom of the ring-shaped elastic buckle.
4. The dry electrode fixation device for electroencephalograph amplifier according to claim 3, wherein A limiting ring sleeve is arranged around the ring-shaped elastic buckle, the limiting ring sleeve has a hollow cylindrical structure with a closed top and an open bottom, a circular hole is arranged at the top of the limiting ring sleeve for the dry electrode mounting end head to pass through, a circular limiting groove is arranged at the center of the inner end face of the top of the limiting ring sleeve, the center line of the circular limiting groove coincides with the center line of the snap ring, the snap ring is arranged in the circular limiting groove, the outer diameter of the snap ring is smaller than the diameter of the circular limiting groove under the condition of no external force, and the outer side of the snap ring is in contact with the side wall of the circular limiting groove after the snap ring is forced to be opened.