A retractable dry electrode

Abstract

The present invention discloses a retractable dry electrode. The electrode is composed of an upper and lower part, which are made into a sleeve to form relative axial sliding. A spring is installed between the two sliding sleeves. Under normal conditions, a certain sliding distance is left between the two parts. When in use, the upper part of the electrode is connected to the electrode buckle, and the lower part is in contact with the skin. When the upper part of the electrode is pressed, the spring in the sleeve is compressed, thereby changing the tightness of the contact between the lower part and the skin to form a better contact. Since the height of the electrode is compressible, even if it is used on an uneven human body surface, the electrode can still have good contact with the skin surface.

Description

Technical Field

[0001] The invention relates to a retractable dry electrode. Background Art

[0002] Existing human body potential collection is usually achieved through sticky wet electrodes. In order to ensure good contact between the skin and the electrodes, such electrodes need to use conductive paste, which is very inconvenient to use. In portable mobile wearable and home use environments, dry electrodes can be used instead. There is no need to apply conductive paste when using them, which is simple and convenient to use.

[0003] However, the use of dry electrodes often leads to poor contact between the electrodes and human skin. In addition to increasing the degree of engagement between the electrodes and the skin by adding micro-protrusions to the contact surface between the electrodes and the human body, the solution is to increase the external force to press the electrodes tightly to increase their tightness to the skin being tested. However, in some tests, due to the unevenness of the tested human body parts, when the electrodes are pressed, the degree of compression of different electrodes is different, and the tightness of some electrodes to the skin is not enough, resulting in poor contact and affecting the sensitivity of signal acquisition.

[0004] In order to solve the above problems, the present invention discloses a retractable dry electrode, which is divided into two parts, connected by a spring in the middle, and different electrode heights can be obtained by compressing the spring, thereby solving the problem that the electrode cannot make good contact with different parts of the human body when detecting them. At the same time, due to the elasticity of the electrode, good contact between the electrode and the human skin can be ensured when the detected human body moves. Summary of the invention

[0005] The invention discloses a retractable dry electrode, which consists of an upper part and a lower part. The upper part and the lower part slide relative to each other along the axial direction through a sleeve. A connecting spring is installed between the two sleeves. Under normal conditions, a certain distance is left between the upper part and the lower part. By pressing the upper and lower parts tightly, the height of the electrode can be compressed, so that the electrode meets different detection height and tightness requirements.

[0006] Preferably, the lower part of the electrode is made of a large disc with tiny protrusions and a cylinder to form a step shape; the upper part of the electrode is made of two cylinders to form a step shape, wherein one end of the small cylinder is made into a hemispherical shape for installing an electrode buckle; the diameter of the cylinder in the lower part is smaller than the diameter of the large cylinder in the upper part, that is, the cylinder in the lower part is inserted into the inner cylinder of the large cylinder in the upper part to form an axial sliding sleeve structure.

[0007] Furthermore, the upper and lower sleeve parts of the electrode are properly matched so that they can slide flexibly along the axial direction.

[0008] Furthermore, when the lower cylinder is inserted into the upper cylinder, the two are connected by a spring, and the spring uses a conductive adhesive to adhere the upper and lower parts together, so that the upper and lower parts of the electrode have good conductivity and are not easy to fall off.

[0009] Preferably, the length of the spring is determined by the sleeve spring installation structure and the compressed distance (height) of the electrode, ensuring that the upper and lower parts are sleeved together to form a whole, and that the upper sleeve is at a certain distance from the lower step, which is the compressed height of the electrode.

[0010] Furthermore, the elasticity of the spring depends on the force with which the electrode is compressed when in use. The greater the elasticity, the greater the force required when compressed, and vice versa.

[0011] The beneficial effects of the present invention are:

[0012] By adjusting the contact force of the electrode, adjusting the electrode height and the contact tightness of the measuring point of contact with the human skin, the problem of the electrode not being able to make good contact with the body due to unevenness when testing different parts of the human body can be overcome. At the same time, due to the elasticity of the electrode, good contact between the electrode and the human skin can be ensured when the tested body moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a retractable dry electrode appearance structure of a preferred embodiment of the present invention;

[0014] Figure 2 It is a retractable dry electrode internal structure of a preferred embodiment of the present invention;

[0015] Figure 3 The invention relates to a three-lead electrocardiogram detector according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic principles, basic structures and basic functions of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0017] A person skilled in the art may be aware of some variations and equivalent substitutions of the present invention, but these variations and equivalent substitutions should not be construed as exceeding the protection scope of the present invention.

[0018] like Figure 1The appearance structure of a retractable dry electrode of the preferred embodiment of the present invention is shown as follows: 11 is the upper part of the electrode, 12 is the lower part of the electrode; 11 and 12 are connected by sliding sleeves 15 and 16, 15 is the inner wall of the outer sleeve, which is a part of 11; 16 is the inner sleeve, which is a part of 12; a spring 18 is installed between the two sliding sleeves; 14 is a hemispherical head connecting the upper part of the electrode with the electrode buckle, which is used to fix the detection buckle with the upper part of the electrode; 17 is the contact part of the lower part of the electrode with the measured skin, which forms a step shape with 16; the contact surface of the electrode 12 with the human skin is pressed tightly, and the spring 18 in the sleeve is compressed, so that the electrode is pressed into 11, and the elastic force of the spring adjusts the tightness of the contact surface of the electrode 12 with the surface of the detected human body, so that it can be well contacted. The micro protrusion 13 on 12 ensures that the electrode is in good contact with the human skin, and the shape and size of 13 can be appropriately selected to make it feel more comfortable when in contact with the human skin.

[0019] like Figure 2 The internal structure of a retractable dry electrode of the preferred embodiment of the present invention is shown in FIG. 21, which is a cross-sectional view of the electrode. 21 is the upper part of the electrode, 22 is the lower part of the electrode; 23 is the spherical part where the electrode and the electrode buckle are installed; 24 is the inner hole where the spring 30 is installed in the upper part of the electrode; 27 is the inner hole where the spring is installed in the lower part of the electrode; 26 is the step in the lower part of the electrode, which is used as an outer cylinder embedded in the inner cylinder 25 of 21. After 26 is embedded in 25, the two can slide well; 28 and 29 are the telescopic distances of the electrode after installation, and the two are consistent. As shown in the figure, the two ends of the spring 30 are fixed in the holes 24 and 27 respectively with conductive glue. After the electrode is installed, the upper and lower parts form a whole and can only form axial movement.

[0020] like Figure 3 The preferred embodiment of the present invention is a three-lead electrocardiograph detector, 31 is the shell of the electrocardiograph detector, and the electrode 32 is installed on the bottom of the shell, and the bottom of the shell is a plane. If 32 is not a retractable dry electrode, when detecting different parts of the human body, due to the curvature of the human body surface, four electrodes with the same height cannot completely contact the skin of the person being detected. The retractable electrode of the present invention can make up for this defect, and by pressing 31 tightly, different heights can form good contact when clicking on different skin surfaces.

[0021] Beneficial technical effects of the preferred embodiments of the present invention:

[0022] The direct benefit of the present invention is that the electrodes automatically adjust the height and pressure according to the degree of pressing, thus overcoming the problem that the electrodes cannot make good contact with the surface of the skin being tested due to unevenness when testing different parts of the human body. For example, the portable three-lead electrocardiogram detector of the preferred embodiment of the present invention can ensure that all four electrodes make good contact with the surface of the skin being tested when used on different people or different parts of the human body by using the electrodes.

[0023] Based on the above embodiments of the present invention, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A retractable dry electrode, characterized in that: It consists of an upper part, a lower part and a connecting spring: the upper part of the electrode is used to fix the electrode buckle, and one end of the fixing spring is used as the outer sleeve for fixing the electrode to the device housing and the axial extension of the electrode; the lower part of the electrode is used to fix one end of the spring, and is used as the inner sleeve for axial movement and extension of the electrode, and is used as the contact surface between the electrode and the skin of the human body being tested; the connecting spring of the electrode is used to connect the upper and lower parts of the electrode, and make it axially extend and retract by compressing the spring; A certain distance is left between the upper part and the lower part, and the distance is the distance by which the electrode is compressed; The elasticity and length of the connecting spring can be adjusted, thereby adjusting the telescopic distance of the retractable dry electrode and the strength and tightness of contact with the skin surface; the length of the spring is determined by the sleeve spring installation structure and the distance the electrode is compressed; The upper and lower parts of the electrode are properly matched through the sleeve so that they can slide flexibly along the axial direction; The lower part is composed of a stepped cylinder and a disc, one end of the cylinder is inserted into the inner hole of the upper part of the electrode to form a movable sleeve, the inner hole of which is used to fix the spring, and the spring uses a conductive adhesive to adhere the upper and lower parts together, so that the upper and lower parts of the electrode have good conductivity and are not easy to fall off; The lower surface of the disc is provided with tiny protrusions to ensure good contact between the electrode and human skin.

2. The retractable dry electrode as claimed in claim 1, characterized in that: The upper part is composed of two stepped cylinders. One end of the small diameter cylinder is made into a hemispherical shape to facilitate connection with the electrode buckle. The outside of the large cylinder is used to fix with the detection equipment shell. A large hole is drilled in the inner wall to serve as a movable sleeve for the lower part of the electrode.

3. A three-lead electrocardiogram detector, characterized in that: It comprises a shell and the retractable dry electrode as described in any one of claims 1 to 2, wherein the retractable dry electrode is mounted on the bottom of the shell; and the bottom of the shell is a plane.

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