CN219720709U - Monitoring equipment and monitor assembly - Google Patents

Abstract

The utility model relates to the field of electrocardiographic monitoring, in particular to monitoring equipment and a monitor assembly. The monitoring device provided by the utility model comprises a monitor, a first control unit and a second control unit, wherein the monitor is provided with a first electrical interface; an electrocardiograph lead wire provided with a second electrical interface; the second electrical interface is used for being in electrical contact connection with the first electrical interface; the first shielding piece is arranged on the monitor and/or the electrocardiograph lead and is used for surrounding the periphery of the joint of the first electrical interface and the second electrical interface when the first electrical interface and the second electrical interface are in electrical contact connection so as to shield interference signals. The first shielding piece is arranged on the electrocardiograph lead wire and/or the monitor, so that the shielding of interference signals is realized, the power frequency interference resistance of the monitoring equipment is effectively improved, and the stability of the performance of the monitoring equipment is ensured.

Description

Monitoring equipment and monitor assembly

Technical Field

The utility model relates to the field of electrocardiographic monitoring, in particular to monitoring equipment and a monitor assembly.

Background

The monitoring device generally comprises a monitor body and various accessories for measuring specific parameters, such as an electrocardiograph lead, but in the electrocardiograph waveform measurement process, the monitor is subjected to power frequency interference from network electricity or environment, the power frequency interference signal can influence normal electrocardiograph waveform, normal electrocardiograph waveform abnormality is caused, and electrocardiograph function can not be used in serious conditions, so that the electrocardiograph special standard is used for measuring the suppression capability of the machine on power frequency interference, the common mode suppression ratio (CMRR) also becomes an important performance index of electrocardiograph monitoring, and the higher the common mode suppression ratio (CMRR) is, the stronger the common mode suppression capability is, and the stronger the common mode interference resistance capability of the machine is.

At present, most monitors on the market only meet the minimum requirements specified by the standard, and cannot reach a high common mode rejection ratio, but in the practical application process, when the outside has large power frequency interference, electrocardiosignals are likely to be interfered, so that the performance of the monitor is reduced.

Disclosure of Invention

The utility model aims to solve the technical problem of how to provide monitoring equipment and a monitoring instrument assembly so as to improve the power frequency interference resistance of the monitoring equipment.

In order to solve the above problems, the present utility model provides a monitoring device, including a monitor having a first electrical interface; an electrocardiograph lead wire provided with a second electrical interface; the second electrical interface is used for being in electrical contact connection with the first electrical interface; the first shielding piece is arranged on the monitor and/or the electrocardiograph lead and is used for surrounding the periphery of the joint of the first electrical interface and the second electrical interface when the first electrical interface and the second electrical interface are in electrical contact connection so as to shield interference signals.

Optionally, the first shielding member is arranged in a cylindrical shape; one end of the first shielding piece is fixedly arranged on the periphery of the monitor and surrounds the first electrical interface, and the other end of the first shielding piece is used for inserting the second electrical interface, so that the second electrical interface can be electrically contacted and connected with the first electrical interface in the first shielding piece.

Optionally, the monitor includes a connection portion, the first electrical interface is disposed on the connection portion, and the first shielding member is enclosed on a periphery of the connection portion.

Optionally, the monitor further includes a parameter circuit board, the parameter circuit board is connected with the connection portion, the first electrical interface is electrically connected with the parameter circuit board through the connection portion, and the parameter circuit board is provided with an electrocardiographic circuit area; the monitoring device further includes a second shield disposed in the electrocardiographic circuit region.

Optionally, the second shield comprises a first housing and a second housing; the first housing and the second housing are respectively fixed on two opposite side surfaces of the parameter circuit board and are respectively correspondingly covered in the electrocardio circuit area.

Optionally, the connection part has a third electrical interface, the parameter circuit board has a fourth electrical interface, and the third electrical interface is electrically connected with the fourth electrical interface in a contact manner; the first housing and/or the second housing are/is further covered at the connection part of the third electrical interface and the fourth electrical interface.

Optionally, the electrocardiograph lead includes a plug assembly and a cable assembly; the cable assembly is connected with the plug assembly, and the second electrical interface is arranged on the plug assembly; the plug assembly is internally coated with a first shielding layer.

Optionally, the plug assembly comprises a first inner die, a first outer die and a plug, wherein the cable assembly is inserted into one end of the first inner die, and the plug is fixedly arranged at the other end of the first inner die; the second electrical interface is arranged on the plug and is electrically connected with the cable assembly; the first shielding layer is coated on the periphery of the first inner die; the first outer mold is coated on the periphery of the first shielding layer, and then the first inner mold is coated.

Optionally, the first shielding layer further extends to cover an end face of one end of the first inner die; one end of the first outer mold further extends to cover part of the outer surface of the plug, and the other end of the first outer mold further extends to cover part of the outer surface of the cable assembly.

Optionally, the cable assembly includes a main cable, a branching module and a plurality of branching cables, and the main cable is electrically connected with the plurality of branching cables through the branching module; one end of each branching cable is provided with an electrode, and the other end of each branching cable is inserted into the branching module; one end of the main cable is inserted into the plug assembly, and the other end of the main cable is inserted into the branching module; and a second shielding layer is coated inside the branching module.

Optionally, the branching module comprises a second inner die, a second outer die and a branching circuit board; the second internal mold is coated on the periphery of the branching circuit board; the main cable and the plurality of branch cables respectively penetrate through the second internal mold and are connected with the branch circuit board; the second shielding layer is coated on the periphery of the second inner die; the second outer die is coated on the periphery of the second shielding layer, and two ends of the second outer die are respectively and further extended to cover part of the outer surface of the main cable and part of the outer surface of each cable.

Optionally, the main cable includes outer insulating layer, outer shielding layer and a plurality of heart yearn that the syntropy extends, a plurality of heart yearns extend the setting side by side, outer shielding layer cladding in the periphery of a plurality of heart yearns, outer insulating layer cladding in outer shielding layer's periphery.

Optionally, the main cable further comprises a filling insulation layer, and the filling insulation layer fills gaps between the outer shielding layer and the plurality of core wires.

Optionally, the core wire comprises a core wire extending in the same direction, an inner core insulating layer and an inner core shielding layer; the inner core insulating layer is coated on the periphery of the wire core, and the inner core shielding layer is coated on the periphery of the inner core insulating layer.

In order to solve the above-mentioned problems, the present utility model provides a monitor assembly, which includes a monitor having a first electrical interface for electrically contacting and connecting with a second electrical interface of an electrocardiograph lead; the first shielding piece is at least partially arranged on the monitor and is used for surrounding the periphery of the joint of the first electrical interface and the second electrical interface when the first electrical interface and the second electrical interface are in electrical contact connection so as to shield interference signals.

The beneficial effects of the utility model are as follows: compared with the prior art, the utility model discloses the monitoring equipment and the monitor component, and the first shielding piece is arranged on the electrocardio lead and/or the monitor, so that the junction can be surrounded when the first electrical interface is electrically connected with the second electrical interface, the shielding of interference signals is realized, the electrocardio common mode rejection ratio is improved, the power frequency interference resistance of the monitoring equipment is improved, and the stability of the performance of the monitoring equipment is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic structural diagram of an embodiment of a monitoring device according to the present utility model.

Fig. 2 is a schematic view of the monitoring device of fig. 1 at another angle.

Fig. 3 is a schematic structural diagram of a connection portion in an embodiment of the monitoring device of the present utility model.

Fig. 4 is a schematic structural diagram of a parameter circuit board in an embodiment of the monitoring device of the present utility model.

Fig. 5 is a schematic diagram of the structure of the central electrical lead wire of an embodiment of the monitoring device of the present utility model.

Fig. 6 is a schematic cross-sectional view of a plug assembly in an embodiment of the monitoring device of the present utility model.

Fig. 7 is a schematic cross-sectional view of a branching module in an embodiment of the monitoring device of the present utility model.

Fig. 8 is a schematic cross-sectional view of a main cable in an embodiment of the monitoring device of the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "first," "second," and the like in this disclosure are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "include," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The heart is excited by pacing points, atria and ventricles in each cardiac cycle successively, and along with bioelectric changes, the bioelectric changes are called electrocardiograms, according to the principle of electrocardiograms, an electrocardiograph monitor is invented to assist doctors to monitor patients, generally comprises a monitor body and various accessories for specific parameter measurement, such as an electrocardiograph lead, during electrocardiograph waveform measurement, the monitor can be subjected to power frequency interference from network electricity or environment, the power frequency interference signal can influence normal electrocardiograph waveforms, normal electrocardiograph wave abnormality is caused, and the electrocardiograph function can not be used in serious cases, so that the electrocardiograph standard provides a measure for the suppression capability of the machine to the power frequency interference, the minimum CMRR is not lower than 89dB according to the standard, the common mode suppression specific capability also becomes an important performance index of electrocardiograph monitoring, and the higher the common mode suppression ratio (CMRR) is, the stronger the common mode suppression capability is, and the common mode interference resistance of the machine is larger.

In the prior art, the electrocardiograph monitor mainly adopts methods of right leg driving, high common mode rejection ratio devices and the like to ensure that the common mode rejection ratio meets the declared index. In practice, however, most existing monitors claim CMRR >90dB or even lower, and only just meet the minimum requirements specified by the standard, but cannot achieve a higher common mode rejection ratio; in the practical application process, the condition that the outside has larger power frequency interference exists, and when the outside has larger power frequency interference, the electrocardiosignal is likely to be interfered, so that the performance of the machine is reduced.

How to improve the common mode interference resistance of the monitor under the condition of not affecting the working effect is a big problem to be solved by the monitoring device and the monitor component provided by the utility model.

Referring to fig. 1, 2, 3 and 6, fig. 1 is a schematic structural diagram of an embodiment of a monitoring device according to the present utility model. Fig. 2 is a schematic view of the monitoring device of fig. 1 at another angle. Fig. 3 is a schematic structural diagram of a connection portion in an embodiment of the monitoring device of the present utility model. Fig. 6 is a schematic cross-sectional view of a plug assembly in an embodiment of the monitoring device of the present utility model.

The utility model provides a monitoring device which comprises a monitor 1, an electrocardiograph lead 2 and a first shielding piece 3. The monitor 1 has a first electrical interface 1121, and the electrocardiograph lead 2 has a second electrical interface 2111, where the second electrical interface 2111 is used for electrically contacting and connecting with the first electrical interface 1121, so as to transmit the electrocardiograph signal collected by the electrocardiograph lead 2 to the monitor 1. The first shielding member 3 is disposed on the monitor 1 and/or the electrocardiograph lead 2, and is used for surrounding the periphery of the connection position of the first electrical interface 1121 and the second electrical interface 2111 when the first electrical interface 1121 and the second electrical interface 2111 are electrically connected, so as to shield the power frequency interference signal from the internet power or the environment.

Optionally, a part of the first shielding member 3 may be disposed on the monitor 1, another part of the first shielding member 3 is disposed on the electrocardiograph lead 2, and when the first electrical interface 1121 is electrically connected with the second electrical interface 2111, the two parts of the first shielding member 3 can be combined into a complete first shielding member 3 so as to enclose the connection between the first electrical interface 1121 and the second electrical interface 2111, thereby achieving the effect of shielding interference signals.

Optionally, the first shielding member 3 may be disposed on the monitor 1 or on the electrocardiograph lead 2, and when the first electrical interface 1211 is electrically connected to the second electrical interface 2111, the first shielding member 3 can surround the connection portion of the first electrical interface 1121 and the second electrical interface 2111, so as to achieve the effect of shielding the interference signal.

As shown in fig. 3 and 6, in order to enclose the connection between the first electrical interface 1121 and the second electrical interface 2111, the first shielding member 3 may be configured in a cylindrical shape. One end of the first shielding member 3 is fixedly arranged on the monitor 1 and surrounds the periphery of the first electrical interface 1121, and the other end of the first shielding member is open for inserting the second electrical interface 2111, so that the second electrical interface 2111 can be electrically contacted and connected with the first electrical interface 1121 in the first shielding member 3.

In this embodiment, the monitor 1 may include a connection portion 112, the first electrical interface 1121 is disposed on the connection portion 112, and the first shielding member 3 is disposed around the periphery of the connection portion 112.

Alternatively, the first shielding member 3 may be made of copper-clad, zinc-tin-nickel alloy, tin-clad, red copper, copper-clad, aluminum or the like according to practical requirements.

In this embodiment, by arranging the first shielding member 3 on the electrocardiograph lead 2 and/or the monitor 1, the connection part can be surrounded when the first electrical interface 1121 and the second electrical interface 2111 are electrically connected, so as to realize shielding of interference signals, improve the electrocardiograph common mode rejection ratio, and further improve the power frequency interference resistance of the monitoring device, and provide a guarantee for the stability of the performance of the monitoring device.

Referring to fig. 1-4, fig. 4 is a schematic structural diagram of a parameter circuit board in an embodiment of a monitoring device according to the present utility model. The monitor 1 further includes a parameter circuit board 111, and the first electrical interface 1121 is electrically connected to the parameter circuit board 111 through the connection portion 112. The parameter circuit board 111 is provided with an electrocardiographic circuit area 1112, and the monitoring device further comprises a second shielding member 12, and the second shielding member 12 is covered on the electrocardiographic circuit area 1112 and is used for shielding power frequency interference signals from network electricity or environment.

Optionally, the second shield 12 includes a first housing 121 and a second housing 122. The first casing 121 and the second casing 122 are respectively fixed on two opposite sides of the parameter circuit board 111, and are respectively covered on the two sides at positions corresponding to the electrocardiographic circuit regions 1112.

Optionally, the connection portion 112 may have a third electrical interface 1122, the parameter circuit board 111 has a fourth electrical interface 1111, and the third electrical interface 1122 and the fourth electrical interface 1111 are electrically connected in contact. The electrocardiographic signal inputted to the connection portion 112 through the first electrical interface 1121 can be outputted to the parameter circuit board 111 through the third electrical interface 1122, and the electrocardiographic signal can be processed by the parameter circuit board 111.

Optionally, the first housing 121 and/or the second housing 122 can further cover the connection between the third electrical interface 1122 and the fourth electrical interface 1111, so as to better shield the power frequency interference signal from the power grid or the environment.

Alternatively, the first casing 121 and the second casing 122 may be made of copper-nickel alloy, tin-iron alloy, red copper, copper-nickel alloy, aluminum or other materials according to practical requirements.

Optionally, for installation convenience, the first electrical interface 1121 may be disposed on one side of the connection portion 112, and the third electrical interface 1122 is disposed on the other side of the connection portion 112 facing away from the first electrical interface 1121.

Optionally, the fourth electrical interface 1111 may be disposed on a predetermined side of the parameter circuit board 111, and any one of the first housing 121 and the second housing 122 further extends beyond the predetermined side to form a socket space at a periphery of the predetermined side, and a connection portion between the third electrical interface 1122 and the fourth electrical interface 1111 is located in the socket space.

Alternatively, the connection 112 may be in the form of a connection circuit board, in which case the third and fourth electrical interfaces 1122 and 1111 may be board-to-board connectors. The connection portion 112 may be in other forms such as a connection cable.

Optionally, a shielding connector and a shielding cover may be also used on the parameter circuit board 111 to shield the connection between the third electrical interface 1122 and the fourth electrical interface 1111 and the electrocardiographic region 1112 from interference signals.

The utility model also provides an embodiment of a monitor assembly comprising a monitor 1 and a first shield 3. The monitor 1 is provided with a first electrical interface 1121, and the first electrical interface 1121 is configured to be electrically connected to the second electrical interface 2111 of the electrocardiograph lead 2. The first shielding member 3 is at least partially disposed on the monitor 1, and is configured to surround the periphery of the connection portion between the first electrical interface 1121 and the second electrical interface 2111 when the first electrical interface 1121 and the second electrical interface 2111 are electrically connected, so as to shield the interference signal.

Specifically, the first shielding member 3 may be disposed on the monitor 1 entirely, or may be disposed on the monitor 1 partially, and the other portion is disposed on the cardiac electrical lead 2, so as to surround the periphery of the connection portion between the first electrical interface 1121 and the second electrical interface 2111 when the first electrical interface 1121 and the second electrical interface 2111 are electrically connected to each other, so as to shield the interference signal.

Referring to fig. 5 and 6, fig. 5 is a schematic structural diagram of a central electrical lead wire of an embodiment of the monitoring device of the present utility model. The electrocardiograph lead 2 comprises a plug assembly 21 and a cable assembly 22, the second electrical interface 2111 is disposed on the plug assembly 21, and the plug assembly 21 is used for transmitting electrocardiograph signals to the connecting portion 112 through the second electrical interface 2111. One end of the cable assembly 22 is connected with the plug assembly 21, and the other end far away from the plug assembly 21 can collect electrocardiosignals.

Optionally, the interior of the plug assembly 21 may be covered with a first shielding layer 214 in order to shield power frequency interference signals from mains electricity or the environment.

Further, the plug assembly 21 may include a first inner mold 212, a first outer mold 213, and a plug 211, the cable assembly 22 is inserted into one end of the first inner mold 212, and the plug 211 is fixedly disposed at the other end of the first inner mold 212. The second electrical interface 2111 is electrically connected to the two interfaces by a mating relationship between the plug 211 and the structure of the first electrical interface 1121. The second electrical interface 2111 and the cable assembly 22 are electrically connected in the first inner mold 212.

Optionally, the first shielding layer 214 is wrapped around the first inner mold 212, and the first outer mold 213 is wrapped around the first shielding layer 214, thereby wrapping the first inner mold 212.

Alternatively, the first inner mold 212 and the first outer mold 213 may be made of an insulating material.

Optionally, to achieve better shielding effect of the interference signal, the first shielding layer 214 can further extend to cover an end face of one end of the first inner die 212, for example, in fig. 6, the end face of the first inner die 212 near the end of the cable assembly 22 is also covered with the first shielding layer 214.

Optionally, to achieve better insulation and fixation, one end of the first overmold 213 can further extend over a portion of the outer surface of the plug 211. As shown in fig. 6, the other end of the first overmold 213 may also be further extended to cover a portion of the outer surface of the cable assembly 22 to help secure one end of the cable assembly 22 in the first internal mold 212.

Alternatively, the material of the first shielding layer 214 may be a metal foil material such as copper foil or aluminum foil. The metal net can also be made of non-magnetic metal materials by braiding, and the metal net can be made of copper net, tinned copper net or aluminum-magnesium wire net, etc. Two types of superposition can also be used to form a tighter shield against interfering signals.

In this embodiment, the cable assembly 22 may include a main cable 221, a branching module 222 and a plurality of branching cables 223, where the main cable 221 is electrically connected to the plurality of branching cables 223 through the branching module 222. One end of each of the cables 223 may be provided with an electrode 2231, and the other end of each of the cables 223 is inserted into the cable distribution module 222. One end of the main cable 221 is inserted into the plug assembly 21 and electrically connected to the plug 211 in the first inner mold 212. The other end of the main cable 221 may be inserted into the branching module 222 and electrically connected to the plurality of branching cables 223, so as to transmit the electrocardiosignals collected from the electrodes 2231 at the other end of the branching cables 223.

Referring to fig. 5 and 7, fig. 7 is a schematic cross-sectional structure of a branching module in an embodiment of a monitoring device according to the present utility model. In order to shield the interference signals at the electrical connection between the main cable 221 and the plurality of branch cables 223, the branch module 222 may be internally covered with a second shielding layer 2221.

The branching module 222 includes a second inner die 2222, a second outer die 2223, and a branching circuit board 2224. The second inner mold 2222 is wrapped around the outer periphery of the branching circuit board 2224, and the main cable 221 and the plurality of branching cables 223 are respectively connected with the branching circuit board 2224 through the second inner mold 2222, and the electrical connection between the main cable 221 and the plurality of branching cables 223 is achieved through the branching circuit board 2224.

Wherein, the second shielding layer 2221 is coated on the outer periphery of the second inner mold 2222, and the second outer mold 2223 is coated on the outer periphery of the second shielding layer 2221. In order to better fix the main cable 221 and the plurality of branch cables 223 to the branch circuit board 2224, both ends of the second outer mold 2223 further extend to cover a portion of the outer surface of the main cable 221 and a portion of the outer surface of each of the branch cables 223, respectively.

Alternatively, the material of the second shielding layer 2221 may be a metal foil material such as copper foil or aluminum foil. The metal net can also be made of non-magnetic metal materials by braiding, and the metal net can be made of copper net, tinned copper net or aluminum-magnesium wire net, etc. Two types of superposition can also be used to form a tighter shield against interfering signals.

Optionally, a shielding layer may be disposed in the cable 223, so that after the electrode 2231 collects the electrocardiograph signals, the cable 223, the cable branching module 222, the main cable 221, the plug assembly 21, the second electrical interface 2111, the first electrical interface 1121, the third electrical interface 1122, the fourth electrical interface 1111, and the electrocardiograph circuit region 1112 implement interference signal shielding, thereby reducing the distributed capacitance of the electrocardiograph circuit and the field, further greatly improving the common mode rejection ratio, and further improving the capability of the machine for resisting power frequency interference.

Referring to fig. 8, fig. 8 is a schematic cross-sectional structure of a main cable in an embodiment of the monitoring device of the present utility model. The main cable 221 includes an outer covering insulating layer 2211, an outer covering shielding layer 2212 and a plurality of core wires 2214 extending in the same direction, and the plurality of core wires 2214 extend side by side. The outer shielding layer 2212 is coated on the peripheries of the core wires 2214, bundles the core wires 2214 into a main cable 221 and realizes the integral shielding of all the core wires 2214; the outer shielding layer 2212 is covered by the outer shielding layer 2211 to realize the integral insulation of the main cable 221 from the outside.

Optionally, the core 2214 includes a core 2215 extending in the same direction, a core insulation layer 2216, and a core shielding layer 2217, where the core 2215 is used for transmitting an electrocardiographic signal. The inner core insulation layer 2216 is coated on the periphery of the core 2215, the inner core shielding layer 2217 is coated on the periphery of the inner core insulation layer 2216, and the electrical isolation between the core 2215 and the inner core shielding layer 2217 is realized by using the inner core insulation layer 2216.

Optionally, the main cable 221 may further include a filling insulation layer 2213, where the filling insulation layer 2213 fills a gap between the outer jacket shielding layer 2212 and the plurality of core wires 2214 to realize insulation between the inner core shielding layer 2217 and the outer jacket shielding layer 2212.

Alternatively, the materials of the inner core shielding layer 2217 and the outer cladding shielding layer 2212 may be metal foil materials such as copper foil or aluminum foil. The metal net can also be made of non-magnetic metal materials by braiding, and the metal net can be made of copper net, tinned copper net or aluminum-magnesium wire net, etc. Two types of superposition can also be used to form a tighter shield against interfering signals.

The foregoing is only the embodiments of the present utility model, and therefore, the patent scope of the utility model is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the utility model.

Claims (15)

1. A monitoring device, comprising:

the monitor is provided with a first electrical interface;

an electrocardiograph lead wire provided with a second electrical interface; the second electrical interface is used for being in electrical contact connection with the first electrical interface;

the first shielding piece is arranged on the monitor and/or the electrocardiograph lead and is used for surrounding the periphery of the joint of the first electrical interface and the second electrical interface when the first electrical interface and the second electrical interface are in electrical contact connection so as to shield interference signals.

2. The monitoring device of claim 1, wherein,

the first shielding piece is arranged in a cylindrical shape; one end of the first shielding piece is fixedly arranged on the periphery of the monitor and surrounds the first electrical interface, and the other end of the first shielding piece is used for inserting the second electrical interface, so that the second electrical interface can be electrically contacted and connected with the first electrical interface in the first shielding piece.

3. The monitoring device of claim 2, wherein,

the monitor comprises a connecting part, the first electrical interface is arranged on the connecting part, and the first shielding piece is arranged on the periphery of the connecting part in a surrounding mode.

4. The monitoring device of claim 3, wherein,

the monitor further comprises a parameter circuit board, wherein the parameter circuit board is connected with the connecting part, the first electrical interface is electrically connected with the parameter circuit board through the connecting part, and the parameter circuit board is provided with an electrocardio circuit area; the monitoring device further includes a second shield disposed in the electrocardiographic circuit region.

5. The monitoring device of claim 4, wherein,

the second shield includes a first housing and a second housing; the first housing and the second housing are respectively fixed on two opposite side surfaces of the parameter circuit board and are respectively correspondingly covered in the electrocardio circuit area.

6. The monitoring device of claim 5, wherein,

the parameter circuit board is provided with a fourth electrical interface, and the third electrical interface is in electrical contact connection with the fourth electrical interface; the first housing and/or the second housing are/is further covered at the connection part of the third electrical interface and the fourth electrical interface.

7. The monitoring device of claim 1, wherein,

the electrocardiograph lead comprises a plug component and a cable component; the cable assembly is connected with the plug assembly, and the second electrical interface is arranged on the plug assembly; the plug assembly is internally coated with a first shielding layer.

8. The monitoring device of claim 7, wherein,

the plug assembly comprises a first inner die, a first outer die and a plug, wherein the cable assembly is inserted into one end of the first inner die, and the plug is fixedly arranged at the other end of the first inner die; the second electrical interface is arranged on the plug and is electrically connected with the cable assembly; the first shielding layer is coated on the periphery of the first inner die; the first outer mold is coated on the periphery of the first shielding layer, and then the first inner mold is coated.

9. The monitoring device of claim 8, wherein,

the first shielding layer further extends to cover the end face of one end of the first inner die; one end of the first outer mold further extends to cover part of the outer surface of the plug, and the other end of the first outer mold further extends to cover part of the outer surface of the cable assembly.

10. The monitoring device of claim 7, wherein,

the cable assembly comprises a main cable, a branching module and a plurality of branching cables, wherein the main cable is electrically connected with the plurality of branching cables through the branching module; one end of each branching cable is provided with an electrode, and the other end of each branching cable is inserted into the branching module; one end of the main cable is inserted into the plug assembly, and the other end of the main cable is inserted into the branching module; and a second shielding layer is coated inside the branching module.

11. The monitoring device of claim 10, wherein the monitoring device comprises,

the branching module comprises a second inner die, a second outer die and a branching circuit board; the second internal mold is coated on the periphery of the branching circuit board; the main cable and the plurality of branch cables respectively penetrate through the second internal mold and are connected with the branch circuit board; the second shielding layer is coated on the periphery of the second inner die; the second outer die is coated on the periphery of the second shielding layer, and two ends of the second outer die are respectively and further extended to cover part of the outer surface of the main cable and part of the outer surface of each cable.

12. The monitoring device of claim 10, wherein the monitoring device comprises,

the main cable comprises an outer shielding layer, an outer shielding layer and a plurality of core wires which extend in the same direction, wherein the plurality of core wires extend side by side, the outer shielding layer is coated on the periphery of the plurality of core wires, and the outer shielding layer is coated on the periphery of the outer shielding layer.

13. The monitoring device of claim 12, wherein the monitoring device comprises,

the main cable further comprises a filling insulating layer, and the filling insulating layer is filled in gaps between the outer shielding layer and the plurality of core wires.

14. The monitoring device of claim 12, wherein the monitoring device comprises,

the core wire comprises a core wire extending in the same direction, an inner core insulating layer and an inner core shielding layer; the inner core insulating layer is coated on the periphery of the wire core, and the inner core shielding layer is coated on the periphery of the inner core insulating layer.

15. A monitor assembly, comprising:

the monitor is provided with a first electrical interface and is used for being in electrical contact connection with a second electrical interface of the electrocardiograph lead;

the first shielding piece is at least partially arranged on the monitor and is used for surrounding the periphery of the joint of the first electrical interface and the second electrical interface when the first electrical interface and the second electrical interface are in electrical contact connection so as to shield interference signals.