Disposable electrocardio sensor

Abstract

The disposable electrocardio sensor comprises an electrocardio sensor body, the electrocardio sensor body comprises a flexible circuit layer, an electrocardio sensor is arranged in a sampling circuit of the flexible circuit layer, and a first shielding circuit layer and a second shielding circuit layer are arranged on the two sides of the flexible circuit layer respectively; the first shielding circuit layer is provided with a skin-friendly layer in an attached mode through a double-faced adhesive tape layer, and hydrogel is arranged on the skin-friendly layer. A printed image-text layer is arranged outside the shielding circuit layer II; the sampling circuit comprises a flexible base material provided with a conductive silver paste layer and a signal acquisition sheet, the conductive silver paste layer is provided with a detection point, and the signal acquisition sheet is arranged on the detection point; sampling through holes corresponding to the detection points are respectively formed in the shielding circuit layer I and the double-sided adhesive layer; and the hydrogel is arranged at the positions of the sampling through holes, is in contact with the signal acquisition sheet and can be electrically connected with the signal acquisition sheet. The utility model discloses a disposable electrocardio sensor which is good in skin-friendly effect, excellent in attaching effect and high in anti-interference capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products, in particular to a disposable electrocardiograph sensor. Background Art

[0002] Bioelectric signal measurement can be achieved through wearable sensors, and the sensor device is attached to the skin through sensor attachment accessories. Existing sensor attachment accessories are usually conductive gel close to the skin, which is attached to the special-shaped parts of the silver chloride coating material. The raised part of the special-shaped part penetrates the substrate and interlocks with the metal part on the other side; this silver chloride coating material is in contact with the conductive gel, which can conduct the bioelectric signal of the human body. At the same time, the silver chloride coating material is conductive and can transmit the biological point signal to the metal part on the other side; the substrate is attached with adhesive, which can be attached to the human body to maintain the reliability of the connection; the metal part can be connected to the sensor through wires or contacts.

[0003] For this structure, due to the interlocking of special-shaped parts and metal parts, the structure is relatively complex, which increases the overall thickness; at the same time, due to the docking of metal parts or the connection of longer wires, friction can easily introduce interference signals, resulting in an unstable signal acquisition process and uncomfortable wearing.

[0004] Therefore, further improvements have been made in the prior art, and an ECG sensor accessory and an ECG sensor assembly (patent application number: CN201921111265.3) are disclosed; the ECG sensor accessory is disclosed, including: a first adhesive layer, a first through hole is provided on the first adhesive layer, and the first adhesive layer is used to be bonded to the object to be detected; a first conductive gel, the first conductive gel is provided on the first surface of the first adhesive layer, and the first conductive gel passes through the first through hole on the first adhesive layer to contact the object to be detected to receive the ECG signal of the object to be detected; a conductive substrate and a conductive layer, wherein the conductive layer is provided on the second surface of the conductive substrate, and the second surface is the surface of the conductive substrate away from the first adhesive layer; a second through hole is provided on the conductive substrate; a second conductive gel, the second conductive gel is provided on the second surface of the conductive substrate, and the second conductive gel is electrically connected to the conductive layer. However, the improved ECG sensor accessories in the prior art still have the problem of signal interference.

[0005] Therefore, there is an urgent need to develop a disposable ECG sensor with good skin-friendly effect, excellent fitting effect and strong anti-interference ability. Utility Model Content

[0006] The utility model overcomes the shortcomings of the prior art and provides a disposable electrocardiograph sensor with good skin-friendly effect, excellent fitting effect and strong anti-interference ability.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a disposable ECG sensor, including an ECG sensor body, the ECG sensor body including a flexible circuit layer, and an ECG sensor is arranged in a sampling circuit of the flexible circuit layer, and shielding circuit layer one and shielding circuit layer two are respectively arranged on both sides of the flexible circuit layer; the shielding circuit layer one is provided with a skin-friendly layer through a double-sided adhesive layer, and a plurality of hydrogels are arranged on the skin-friendly layer; a printed graphic layer is arranged on the outside of the shielding circuit layer two; the sampling circuit includes a flexible substrate provided with a conductive silver paste layer and a plurality of signal acquisition sheets, a plurality of detection points are arranged on the conductive silver paste layer, and the signal acquisition sheets are arranged on the detection points; a plurality of sampling through holes corresponding to the detection points are respectively arranged on the shielding circuit layer one and the double-sided adhesive layer, and the hydrogel is arranged at the position of the sampling through hole and contacts with the signal acquisition sheet and can be electrically connected.

[0008] In a preferred embodiment of the present invention, a release paper is arranged outside the skin-friendly layer, and the release paper covers the hydrogel.

[0009] In a preferred embodiment of the utility model, a plurality of connection points electrically connected to the cables are arranged on the flexible circuit layer; the plurality of connection points are arranged in a rectangular shape, a plurality of detection points are located outside the connection points, and a plurality of signal transmission components for transmitting ECG signals are arranged on the connection points.

[0010] Specifically, multiple detection points are arranged in a straight line.

[0011] In a preferred solution of the utility model, the printed graphic layer includes a printed shielding layer arranged outside the second shielding circuit layer, and printed graphics are printed outside the printed shielding layer.

[0012] In a preferred embodiment of the utility model, the flexible circuit layer includes a flexible substrate, a conductive silver paste layer is provided on the flexible substrate, an insulating layer is provided on the conductive silver paste layer, and the insulating layer on the conductive silver paste layer is exposed at the connection points and the detection points, the signal acquisition sheet is electrically connected to the detection points, and the connection points are electrically connected to the cables.

[0013] In a preferred embodiment of the utility model, the shielding circuit layer 1 is arranged on the lower side of the flexible circuit layer, an insulating layer is arranged between the shielding circuit layer 1 and the flexible circuit layer, and the shielding circuit layer 1 is located between the insulating layer and the double-sided adhesive layer.

[0014] In a preferred solution of the utility model, the second shielding circuit layer is arranged on the upper side of the flexible circuit layer, and the second shielding circuit layer is located between the flexible substrate and the printed shielding layer.

[0015] Specifically, the signal acquisition chip adopts a silver chloride sampling chip.

[0016] In a preferred solution of the utility model, the shielding circuit layer 1 and the shielding circuit layer 2 respectively adopt printed circuits; the shielding circuit layer 1, the flexible circuit layer and the shielding circuit layer 2 are provided with connecting through holes corresponding to the connecting points.

[0017] In a preferred embodiment of the utility model, the signal transmission component includes a nail button base and a nail cap, and the protrusion 1 of the nail button base passes through the connection point on one side of the flexible circuit layer and then docks and is embedded in the protrusion 2 of the nail cap, and the nail button base and the nail cap are pressed onto the flexible circuit layer, and the protrusion 2 of the nail cap passes through the avoidance hole of the shielding circuit layer 2 and then leads out to the shielding circuit layer 2 and the printed graphic layer; and the signal transmission component is electrically isolated from the shielding circuit layer 2 and the shielding circuit layer 1.

[0018] In a preferred embodiment of the utility model, the electrocardiogram sensor body is a flexible test patch of T-shaped structure, including a main flexible test patch of straight line shape and a branch flexible test patch connected to the main flexible test patch of straight line shape by T-connection.

[0019] Specifically, a plurality of test branches connected to the signal acquisition sheet are arranged in the branch flexible test patch, and a separation dotted line is arranged between adjacent test branches.

[0020] The utility model solves the defects existing in the background technology:

[0021] The utility model discloses a disposable ECG sensor with good skin-friendly effect, excellent lamination effect and strong anti-interference ability; the flexible circuit layer adopts the conductive silver paste layer and the silver chloride of the signal acquisition sheet with hydrogel as the conductive material, which has good conductive performance, and has excellent biocompatibility and chemical stability. With an ultra-thin flexible substrate as a carrier, it can be closely attached to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of the preferred embodiment of the utility model Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the preferred embodiment of the utility model Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the split structure of the preferred embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the axial structure of the preferred embodiment of the utility model after explosion;

[0027] Figure 5This is a schematic diagram of the flattened structure after explosion of the preferred embodiment of the utility model;

[0028] In the figure, 1-release paper, 2-hydrogel, 3-skin-friendly layer, 4-double-sided adhesive layer, 5-shielding circuit layer one, 6-flexible circuit layer, 61-conductive silver paste layer, 62-signal acquisition sheet, 63-nail button base, 64-nail cap, 612-insulating layer, 611-flexible substrate, 7-shielding circuit layer two, 8-printed graphic layer, 81-printed shielding layer, 82-printed graphics, 91-sampling through hole, 92-detection point, 93-test branch line, 94-connection point, 95-connection through hole, 10-ECG sensor body. DETAILED DESCRIPTION

[0029] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Embodiment 1

[0030] like Figure 1-Figure 5 As shown, a disposable ECG sensor includes an ECG sensor body 10, wherein the ECG sensor body 10 includes a flexible circuit layer 6, and an ECG sensor is arranged in the sampling circuit of the flexible circuit layer 6. The sampling circuit includes a flexible substrate 611 provided with a conductive silver paste layer 61 and a plurality of signal acquisition sheets 62, wherein the conductive silver paste layer 61 is provided with a plurality of detection points 92, and the signal acquisition sheet 62 is arranged on the detection points 92. Specifically, the flexible circuit layer 6 includes a flexible substrate 611, wherein a conductive silver paste layer 61 is provided on the flexible substrate 611, wherein a sampling circuit is arranged on the conductive silver paste layer 61, wherein an ECG sensor is electrically connected in the sampling circuit, and an insulating layer 612 is provided on the conductive silver paste layer 61 for insulating sealing. A plurality of connection points 94 and a plurality of detection points 92 are arranged on the conductive silver paste layer 61 of the flexible circuit layer 6, wherein the plurality of connection points 94 are arranged in a rectangular shape, and a plurality of signal transmission components for connecting with an external device to realize ECG signal transmission are arranged on the connection points 94. The plurality of detection points 92 are located at the periphery of the connection point 94, and the plurality of detection points 92 are arranged in a straight line; the connection point 94 and the detection point 92 of the conductive silver paste layer 61 expose the insulating layer 612 on the conductive silver paste layer 61; the signal acquisition sheet 62 is electrically connected to the detection point 92, and specifically, the signal acquisition sheet 62 is a silver chloride sampling sheet. The flexible substrate 611 is a PET flexible layer.

[0031] Specifically, shielding circuit layer 1 5 and shielding circuit layer 2 7 are respectively arranged on both sides of the flexible circuit layer 6; the shielding circuit layer 1 5 is bonded with the skin-friendly layer 3 through the double-sided adhesive layer 4, the shielding circuit layer 1 5 is arranged on the lower side of the flexible circuit layer 6, and an insulating layer 612 is arranged between the shielding circuit layer 1 5 and the flexible circuit layer 6, and the shielding circuit layer 1 5 is located between the insulating layer 612 and the double-sided adhesive layer 4. A plurality of hydrogels 2 are arranged on the skin-friendly layer 3; a printed graphic layer 8 is arranged on the outside of the shielding circuit layer 2 7. The printed graphic layer 8 includes a printed shielding layer 81 arranged on the outside of the shielding circuit layer 2 7, and a printed graphic 82 is printed on the outside of the printed shielding layer 81. The shielding circuit layer 2 7 is arranged on the upper side of the flexible circuit layer 6, and the shielding circuit layer 2 7 is located between the flexible substrate 611 and the printed shielding layer 81.

[0032] Specifically, a plurality of sampling through holes 91 corresponding to the detection points 92 are respectively provided on the shielding circuit layer 1 5 and the double-sided adhesive layer 4, and the hydrogel 2 is provided at the position of the sampling through hole and is in contact with the signal acquisition sheet 62 and can be electrically connected. A release paper 1 is also provided outside the skin-friendly layer 3, and the release paper 1 covers the hydrogel 2. The shielding circuit layer 1 5 and the shielding circuit layer 2 7 are respectively conductive circuit layers; the shielding circuit layer 1 5, the insulating layer 612, the conductive silver paste layer 61, and the shielding circuit layer 2 7 are provided with connection through holes 95 corresponding to the connection points 94.

[0033] Furthermore, the signal transmission component includes a nail button base 63 and a nail cap 64, and the protrusion one of the nail button base 63 passes through the connection point 94 on one side of the flexible circuit layer 6 and then docks and is embedded in the protrusion two of the nail cap 64, and the nail button base 63 and the nail cap 64 are pressed onto the flexible circuit layer 6, and the protrusion two of the nail cap 64 passes through the avoidance hole of the shielding circuit layer two 7 and then leads out to the shielding circuit layer two 7 and the printed graphic layer 8; and the signal transmission component is electrically isolated from the shielding circuit layer two 7 and the shielding circuit layer one 5.

[0034] Furthermore, the flexible test patch of T-shaped structure includes a main flexible test patch 11 of straight line, and a branch flexible test patch 12 connected to the main flexible test patch 11 of straight line. Specifically, the branch flexible test patch 12 is provided with a plurality of test branches 93 connected to the signal acquisition sheet 62, and a separation dotted line is provided between adjacent test branches 93. The connection point 94 is electrically connected to the test branch 93 to form the branch flexible test patch 12. Embodiment 2

[0035] On the basis of the first embodiment, a through hole exposing the end of the signal transmission element is provided on the printed graphic layer 8 to facilitate the electrical contact between the signal transmission element and the external detection equipment for the transmission and collection of the electrocardiogram signal. Embodiment 3

[0036] On the basis of the first or second embodiment, the patch impedance of the ECG sensor body 10, the hydrogel 2 and the longest resistance need to be less than 1 kΩ, and the longest line impedance of the printed motor index is <2000Ω; it is bendable and wear-resistant.

[0037] The performance test of the electrocardiogram sensor body 10 of the utility model is as follows:

[0038] AC resistance:

[0039] The product test makes the gel-to-gel connection to form an electrode pair, and the average impedance does not exceed 2Ω at 10Hz, with an applied current of no more than 100µA (peak-to-peak). The impedance of each individual gel-to-gel electrode pair does not exceed 3KΩ.

[0040] DC offset voltage:

[0041] After a pair of electrodes connected by glue are stabilized for 1 minute, the offset voltage that appears is no more than 100mv.

[0042] Comply with offset instability and internal noise;

[0043] After a stabilization period of 1 minute for a pair of electrodes connected by glue, the voltage generated in the frequency band of 0.5Hz-100Hz (first-order frequency response) should not exceed 150µV (peak-to-peak) within the next 5 minutes.

[0044] Defibrillation Overload Recovery:

[0045] A 10µF capacitor charged to 200V is discharged through a series circuit of an electrode pair and a 100Ω resistor. In the 5th second after the capacitor begins to discharge, the absolute value of the polarization electromotive force of the electrode pair connected to each other does not exceed 100mv; in the following 30 seconds, the change in the residual polarization electromotive force is not greater than ±1mv / s. When the above experiment is carried out as required, the 10Hz AC impedance of the electrode pair should be no greater than 3KΩ.

[0046] Bias current tolerance:

[0047] A direct current of 200 nA is applied to the electrode pair connected by gel to gel for a duration of 8 h. The voltage change at both ends of the electrode pair observed during the entire duration should not be greater than 100 mv.

[0048] Biosafety:

[0049] Cytotoxicity: should be no greater than level 1. Skin irritation: should be very mild. Delayed sensitization reaction: should be non-sensitizing.

[0050] Application performance:

[0051] Initial adhesion: 1500; Holding force: 200g, no movement for 30 days; Skin-friendly: Low skin resistance when peeling off.

[0052] Working principle:

[0053] like Figure 1-Figure 5 As shown, when the ECG sensor body 10 of the first or second embodiment is used, the release paper 1 on the ECG sensor body 10 is torn off, and the side of the ECG sensor body 10 provided with the skin-friendly layer 3 is torn off and attached to the user's body, thereby improving the skin-friendly effect, fitting performance and anti-interference ability of the ECG sensor body 10 of the utility model. The ECG sensor body 10 obtains ECG signals through the hydrogel 2, four signal acquisition sheets 62, and the detection points 92 on the conductive silver paste layer 61 to sample ECG signals. The shielding circuit layer 1 5 and the shielding circuit layer 2 7 arranged on both sides of the flexible circuit layer 6 utilize the electrostatic shielding effect to shield the interference signal, eliminate the interference, and make the signal easier to transmit to the detection device. The signal transmission component composed of the button base 63 and the nail cap 64 arranged on the connection point 94, the button base 63 and the nail cap 64 are used to connect the flexible circuit layer 6 and the external device to realize ECG signal transmission.

[0054] Based on the ideal embodiment of the utility model, through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content of the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A disposable electrocardiogram sensor, comprising an electrocardiogram sensor body (10), wherein the electrocardiogram sensor body (10) comprises a flexible circuit layer (6), and an electrocardiogram sensor is arranged in a sampling circuit of the flexible circuit layer (6), characterized in that: A shielding circuit layer 1 (5) and a shielding circuit layer 2 (7) are respectively arranged on both sides of the flexible circuit layer (6); the shielding circuit layer 1 (5) is bonded with a skin-friendly layer (3) via a double-sided adhesive layer (4), and a plurality of hydrogels (2) are arranged on the skin-friendly layer (3); a printed graphic layer (8) is arranged on the outside of the shielding circuit layer 2 (7); The sampling circuit comprises a flexible substrate (611) provided with a conductive silver paste layer (61) and a plurality of signal collection sheets (62), a plurality of detection points (92) being provided on the conductive silver paste layer (61), and the signal collection sheets (62) being provided on the detection points (92); The shielding circuit layer 1 (5) and the double-sided adhesive layer (4) are respectively provided with a plurality of sampling through holes (91) corresponding to the detection points (92); the hydrogel (2) is arranged at the positions of the sampling through holes and is in contact with and electrically connected to the signal collection sheet (62).

2. The disposable ECG sensor according to claim 1, characterized in that: A release paper (1) is also provided outside the skin-friendly layer (3), and the release paper (1) covers the hydrogel (2).

3. The disposable ECG sensor according to claim 2, characterized in that: A plurality of connection points (94) are arranged on the flexible circuit layer (6); the plurality of connection points (94) are arranged in a rectangular shape; the plurality of detection points (92) are located outside the connection points (94); and a plurality of signal transmission components for transmitting electrocardiogram signals are arranged on the connection points (94).

4. The disposable ECG sensor according to claim 3, characterized in that: The printed graphic layer (8) comprises a printed shielding layer (81) arranged outside the second shielding circuit layer (7), and printed graphics (82) are printed outside the printed shielding layer (81).

5. The disposable ECG sensor according to claim 4, characterized in that: The flexible circuit layer (6) comprises a flexible substrate (611), a conductive silver paste layer (61) being provided on the flexible substrate (611); an insulating layer (612) being provided on the conductive silver paste layer (61), and the connecting point (94) and the detection point (92) are exposed to the insulating layer (612) on the conductive silver paste layer (61), and the signal collection sheet (62) is electrically connected to the detection point (92).

6. The disposable ECG sensor according to claim 5, characterized in that: The shielding circuit layer one (5) is arranged on the lower side of the flexible circuit layer (6), an insulating layer (612) is arranged between the shielding circuit layer one (5) and the flexible circuit layer (6), and the shielding circuit layer one (5) is located between the insulating layer (612) and the double-sided adhesive layer (4).

7. The disposable ECG sensor according to claim 6, characterized in that: The second shielding circuit layer (7) is arranged on the upper side of the flexible circuit layer (6), and the second shielding circuit layer (7) is located between the flexible substrate (611) and the printed shielding layer (81).

8. The disposable ECG sensor according to claim 7, characterized in that: The shielding circuit layer one (5) and the shielding circuit layer two (7) are respectively printed circuits; the shielding circuit layer one (5), the flexible circuit layer (6) and the shielding circuit layer two (7) are provided with connection through holes (95) corresponding to the connection points (94).

9. The disposable ECG sensor according to claim 8, characterized in that: The signal transmission component comprises a nail button base (63) and a nail cap (64); a protrusion 1 of the nail button base (63) passes through a connection point (94) on one side of the flexible circuit layer (6) and then docks and embeds into a protrusion 2 of the nail cap (64); the nail button base (63) and the nail cap (64) are pressed onto the flexible circuit layer (6); the protrusion 2 of the nail cap (64) passes through an avoidance hole of the shielding circuit layer 2 (7) and then leads out of the shielding circuit layer 2 (7) and the printed graphic layer (8); and the signal transmission component is electrically isolated from the shielding circuit layer 2 (7) and the shielding circuit layer 1 (5).

10. The disposable ECG sensor according to claim 9, characterized in that: The electrocardiographic sensor body (10) is a flexible test patch with a T-shaped structure, comprising a straight-line main flexible test patch (11) and a branch flexible test patch (12) connected to the straight-line main flexible test patch (11).

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