CN112089416B - Ground wire electrode for electromyography - Google Patents
Ground wire electrode for electromyography Download PDFInfo
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- CN112089416B CN112089416B CN202010961745.XA CN202010961745A CN112089416B CN 112089416 B CN112089416 B CN 112089416B CN 202010961745 A CN202010961745 A CN 202010961745A CN 112089416 B CN112089416 B CN 112089416B
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- 238000002567 electromyography Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000002184 metal Substances 0.000 claims abstract description 28
- 229920000742 Cotton Polymers 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 8
- 230000001965 increasing effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 230000004936 stimulating effect Effects 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention belongs to the field of electromyography acquisition, and particularly relates to a ground wire electrode for electromyography. A ground wire electrode for electromyography, comprising a connecting wire, further comprising: the skin connecting piece is fixed on the skin and is contacted with the skin; the lead connecting end is electrically connected with the connecting wire and detachably connected with the skin connecting piece; the wire connection terminal includes: one end of the connector is detachably connected with the skin connecting sheet; one end of the stretching cylinder is sleeved on the other end of the connector and is in sliding connection with the outer wall of the connector; one end of the extension rod is arranged on the outer wall of the connector and is fixedly connected with the connector; the metal conductive rod is inserted into the connector and the stretching cylinder and is in sliding connection with the connector and the stretching cylinder, and is electrically connected with the connecting wire. The ground wire electrode fixing mode that this application mentioned is simple and convenient, has moreover and can initiatively stay the conductive liquid, and can initiatively observe the surplus of conductive liquid, in time carries out the effect of adding to the conductive liquid.
Description
Technical Field
The invention belongs to the field of electromyography acquisition, and particularly relates to a ground wire electrode for electromyography.
Background
When the electromyogram is acquired, the ground wire is needed, so that the human skin is grounded, noise in the electromyogram can be reduced, and when the stimulation is needed to be applied to the muscle, the pain of the patient caused by the electrical stimulation can be relieved.
The general ground wire is connected to the limbs of the patient by connecting clips or magic tapes, and water needs to be coated at the connecting parts to increase the conductivity and reduce the skin resistance. However, in this connection, 4 ground wires are required, and if the patient needs to turn over for measurement or the like during measurement, the patient needs to be rearranged and re-coated with water, and the wires are otherwise paid together. In addition, when the electromyography is measured for a long time, water needs to be applied to the ground wire from time to time, and whether the water needs to be applied is generally judged by hands.
Disclosure of Invention
Aiming at the prior art, the invention provides a ground wire electrode for electromyography.
In order to achieve the above object, the technical scheme adopted by the invention is that the ground wire electrode for electromyography comprises a connecting wire and further comprises: the skin connecting piece is fixed on the skin and is contacted with the skin; the lead connecting end is electrically connected with the connecting wire and detachably connected with the skin connecting piece; the wire connection terminal includes: one end of the connector is detachably connected with the skin connecting sheet; one end of the stretching cylinder is sleeved on the other end of the connector and is in sliding connection with the outer wall of the connector; one end of the extension rod is arranged on the outer wall of the connector and is fixedly connected with the connector; the metal conductive rod is inserted into the connector and the stretching cylinder, is connected with the connector and the stretching cylinder in a sliding manner and is electrically connected with the connecting wire; the pressure head is arranged at the other end of the extension rod, hinged with the extension rod and propped against one end of the metal conductive rod.
Preferably, the skin connecting piece comprises: the ground wire connecting shell is used for being connected with the wire connecting end and contacted with the skin; the adhesive tape is fixedly arranged on the side surface of the electric wire connecting shell and used for fixing the ground wire connecting shell on the skin; the ground wire connection shell includes: the shell is of a barrel-mounted structure and is fixedly connected with the adhesive tape; the cover body is arranged at one end of the shell and is detachably connected with the shell; the cotton core is arranged in the shell, fixedly connected with the shell, extends out from the other end of the shell and is contacted with the skin; the liquid level observation structure is arranged on the shell, is rotationally connected with the shell, is communicated with the inside of the shell and is used for observing the liquid level; and the shell is internally provided with a limiting piece, and the limiting piece is fixedly connected with the shell and is used for limiting the cotton core.
Preferably, the liquid level observation structure includes: the L-shaped conduit is a hollow tube, and one end of the L-shaped conduit is rotationally connected with the shell and is communicated with the inside of the shell; the piston body is arranged in the other end of the L-shaped conduit and is in sliding connection with the inner wall of the L-shaped conduit; one end of the counterweight rod is fixedly connected with the piston body.
Preferably, the connector includes: the connecting cylinder is of a cylinder-mounted structure; the connecting port is arranged at one end of the connecting cylinder and is detachably connected with the shell; the limiting plate is arranged in the connecting cylinder and is fixedly connected with the inner wall of the connecting cylinder; the limiting ring is arranged on the outer wall of the connecting cylinder and is fixedly connected with the connecting cylinder; the connecting port consists of a plurality of arc plates; one end of the arc-shaped plate is fixedly connected with the connecting cylinder, and a gap is reserved between the arc-shaped plates; the arc plate is used for extending into the shell.
Preferably, the metal conductive rod includes: one end of the rod body passes through the stretching cylinder and is positioned outside the stretching cylinder, and the other end of the rod body passes through the limiting plate and is positioned in the connecting port; the opening supporting plate is sleeved on the rod body, fixedly connected with the rod body and connected with the inner wall of the connector in a sliding manner; and one end of the reset spring is fixedly connected with the opening supporting plate, and the other end of the reset spring is fixedly connected with the limiting plate.
Preferably, the stretching cylinder includes: one end of the cylinder body is sleeved on the connecting cylinder and is in sliding connection with the connecting cylinder; the first sealing ring is arranged between the inner wall of the cylinder body and the outer wall of the connecting cylinder and is fixedly connected with the cylinder body; the bottom plate is of an annular structure, is arranged at the other end of the cylinder, is fixedly connected with the cylinder and is in sliding connection with the metal conductive rod; and the second sealing ring is arranged between the inner annular wall of the bottom plate and the metal conductive rod, is in sliding connection with the metal conductive rod and is fixedly connected with the bottom plate.
Preferably, the bottom plate includes: the plate body is of an annular structure, the outer annular wall is fixedly connected with the cylinder body, and threads are carved on the inner annular wall; the adjusting bolt is arranged in the inner ring of the plate body and is matched with threads on the inner ring wall of the plate body; the adjusting bolt is provided with a through hole, and the second sealing ring is arranged on the through hole.
Preferably, the adjusting bolt includes: the head is positioned outside the bottom plate and is carved with vertical lines for increasing friction force; one end of the neck is fixedly connected with the head; one end of the tail part is fixedly connected with the neck part and is matched with threads on the annular wall in the plate body; the diameter of the neck is smaller than the diameter of the tail, while the diameter of the neck is smaller than the diameter of the head.
Preferably, when the other end of the L-shaped conduit is perpendicular to the ground, the weight force born by the weight rod and the piston body is equal to the maximum static friction force of the piston body and the inner wall of the L-shaped conduit.
Preferably, two extension rods are oppositely arranged in parallel and are both arranged on the outer wall of the limiting ring of the connecting cylinder and fixedly connected with the limiting ring; the pressing plates are arranged between the extension rods and hinged with the extension rods; a hemispherical bulge is arranged on one plane of the connecting end of the pressing plate and the extension rod; the hemispherical bulges are propped against the end part of the metal conductive rod, which is positioned outside the stretching cylinder.
The invention has the beneficial effects that: the existing clip-type or magic tape-type ground wire has to be arranged on the limbs due to the problem of connection relation. The present application therefore proposes a ground electrode that can be directly connected to any part of the body so that the ground electrode is placed between the stimulating and recording electrodes in an arrangement that meets the electromyographic specifications. The ground wire electrode fixing mode that this application mentioned is simple and convenient, has moreover and can initiatively stay the conductive liquid, and can initiatively observe the surplus of conductive liquid, in time carries out the effect of adding to the conductive liquid. When the collection point needs to be replaced, the position is also convenient to replace.
Drawings
In order to more clearly illustrate the inventive embodiments, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a schematic diagram showing the overall structure of a ground electrode for electromyography
FIG. 2 is a schematic overall cross-sectional view of a ground electrode for electromyography
FIG. 3 is a schematic overall structure of a connection port of a wire connection terminal
FIG. 4 is a schematic view of the overall structure of the wire connection terminal
FIG. 5 is a schematic view of the overall structure of a skin connecting piece
Reference numerals:
1-adhesive tape, 21-shell, 22-limit piece, 31-L-shaped guide tube, 32-piston body, 33-counterweight rod, 4-stretching cylinder, 41-bottom plate, 51-stretching rod, 52-pressing plate, 53-limit plate, 54-connecting cylinder, 55-limit ring, 56-arc plate, 6-metal conductive rod, 61-opening supporting plate, 62-return spring, 63-adjusting bolt, 631-head, 632-neck and 633-tail.
Detailed Description
Embodiments of the inventive aspects of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for the purpose of more clearly illustrating the technical solutions of the present invention and are therefore only exemplary and not intended to limit the scope of protection of the present invention.
As shown in fig. 1 and 5, a ground electrode for electromyography includes a connection line, and further includes: skin tab and wire connection. The skin connecting piece is fixed on the skin and is contacted with the skin. The wire connecting end is electrically connected with the connecting wire and is detachably connected with the skin connecting piece.
The skin connecting piece includes: the ground wire is connected with the shell and the adhesive tape 1. The ground wire connection shell is used for being connected with the wire connection end and is contacted with the skin. The adhesive tape 1 is fixedly installed at a side of the wire connection housing for fixing the ground connection housing to the skin.
The ground wire connection housing includes: a shell 21, a cover body, a liquid level observing structure and a cotton core. The shell 21 is of a barrel-mounted structure and is fixedly connected with the adhesive tape 1. The cover is mounted at one end of the housing 21 and is detachably connected with the housing 21. The cotton core is installed in the housing 21, fixedly connected with the housing 21, and extended from the other end of the housing 21, and contacted with the skin. The liquid level observation structure is installed on the casing 21, is rotationally connected with the casing 21, and is communicated with the inside of the casing 21 for observing the liquid level. The shell 21 is internally provided with a limiting piece 22, and the limiting piece 22 is fixedly connected with the shell 21 and used for limiting the cotton core.
The liquid level observation structure includes: an L-shaped guide tube 31, a piston body 32 and a weight rod 33. The L-shaped conduit 31 is a hollow tube, and one end is rotatably connected to the housing 21 and communicates with the inside of the housing 21. The piston body 32 is installed inside the other end of the L-shaped duct 31 and slidably coupled to the inner wall of the L-shaped duct 31. One end of the weight rod 33 is fixedly connected with the piston body 32.
When the other end of the L-shaped conduit 31 is perpendicular to the ground, the weight force applied by the weight rod 33 and the piston body 32 is equal to the maximum static friction force between the piston body 32 and the inner wall of the L-shaped conduit 31.
The wire connection end includes: the metal conductive rod comprises a connector, an extension rod 51, a metal conductive rod 6, a stretching cylinder 4 and a pressing head. One end of the connector is detachably connected with the skin connecting sheet.
As shown in fig. 2, 3 and 4, the connector includes: the connecting cylinder 54, the limiting plate 53, the limiting ring 55 and a plurality of arc plates 56. The connecting cylinder 54 is a cylinder-mounted structure. The connection port is mounted at one end of the connection cylinder 54 and is detachably connected to the housing 21. The limiting plate 53 is installed in the connecting cylinder 54 and fixedly connected with the inner wall of the connecting cylinder 54. And a limiting ring 55 which is arranged on the outer wall of the connecting cylinder 54 and is fixedly connected with the connecting cylinder 54. The connection port is made up of a number of arcuate plates 56. One end of the arc plate 56 is fixedly connected with the connecting cylinder 54, and a gap is reserved between the arc plates 56. The arcuate plate 56 is adapted to extend into the housing 21.
An extension rod 51, one end of which is mounted on the outer wall of the connector and fixedly connected with the connector. The two extension rods 51 are oppositely arranged in parallel, and are both arranged on the outer wall of the limiting ring 55 of the connecting cylinder 54 and fixedly connected with the limiting ring 55. The metal conductive rod 6 is inserted into the connector and the stretching cylinder 4, and is connected with the connector and the stretching cylinder 4 in a sliding manner, and is electrically connected with the connecting wire. The metal conductive rod 6 includes: a rod body, a port supporting plate 61 and a return spring 62. One end of the rod body passes through the stretching cylinder 4 and is positioned outside the stretching cylinder 4 and is connected with the connecting wire, and the other end passes through the limiting plate 53 and is positioned in the connecting port. The opening supporting plate 61 is sleeved on the rod body, fixedly connected with the rod body and slidably connected with the inner wall of the connector. One end of the return spring 62 is fixedly connected with the opening supporting plate 61, and the other end is fixedly connected with the limiting plate 53.
The pressure head is arranged at the other end of the extension rod 51, hinged with the extension rod 51 and propped against one end of the metal conductive rod 6. The pressing plate 52 is installed between the two extension rods 51 and hinged with the extension rods 51. A hemispherical protrusion is provided on one plane of the connection end of the pressing plate 52 and the extension rod 51. The hemispherical protrusion abuts against the end of the metal conductive rod 6 located outside the drawing cylinder 4.
One end of the stretching cylinder 4 is sleeved on the other end of the connector and is in sliding connection with the outer wall of the connector. The stretching cylinder 4 includes: barrel, sealing washer No. one, bottom plate 41 and sealing washer No. two. One end of the cylinder body is sleeved on the connecting cylinder 54 and is in sliding connection with the connecting cylinder 54. And the first sealing ring is arranged between the inner wall of the cylinder body and the outer wall of the connecting cylinder 54 and is fixedly connected with the cylinder body. The bottom plate 41 has a ring-shaped structure, is mounted at the other end of the cylinder, is fixedly connected with the cylinder, and is slidably connected with the metal conductive rod 6. The second sealing ring is arranged between the inner annular wall of the bottom plate 41 and the metal conductive rod 6, is in sliding connection with the metal conductive rod 6, and is fixedly connected with the bottom plate 41.
The bottom plate 41 includes: a plate body and an adjusting bolt 63. The plate body is of an annular structure, the outer annular wall is fixedly connected with the cylinder body, and threads are carved on the inner annular wall. An adjusting bolt 63 is mounted in the inner ring of the plate body and cooperates with threads on the inner ring wall of the plate body. The adjusting bolt 63 is provided with a through hole, and the second sealing ring is arranged on the through hole.
The adjusting bolt 63 includes: head 631, neck 632, and tail 633. Head 631 is located outside of base 41 and is notched with friction enhancing ribs. One end of neck 632 is fixedly connected to head 631. One end of the tail 633 is fixedly connected to the neck 632, and external threads are engraved on the tail 633. The external thread is matched with the internal thread on the inner annular wall of the plate body. Wherein the diameter of neck 632 is smaller than the diameter of tail 633, while the diameter of neck 632 is smaller than the diameter of head 631.
When the device is used, the cotton core exposed end of the skin connecting piece is fixed on a patient, the cover body is taken down, then the connecting port of the wire connecting end is inserted into the shell 21, and then the pressing plate 52 is pressed down, so that the metal conductive rod 6 is in contact with the cotton core, and the connecting port is simultaneously fixed with the shell 21. A conductive liquid is provided in the space between the connection port and the stretching cylinder 4. When the pressing plate 52 is pressed down, the opening supporting plate 61 is driven by the metal conductive rod 6 to move downwards to the position of the arc plate 56. The arc plate 56 is bent inwards in a normal state, and the opening supporting plate 61 moves downwards at the moment, so that the contact part of the arc plate 56 and the opening supporting plate 61 expands, the outer wall of the arc plate 56 is propped against the inner wall of the shell 21, and meanwhile, the maximum static friction force between the arc plate 56 and the inner wall of the shell 21 is increased due to the compression of the opening supporting plate 61, so that the fixation of the connecting port and the shell 21 is completed.
Because of the gaps between the arcuate plates 56, the conductive fluid flows into the cotton core along the gaps, wetting the cotton core and wetting the skin in contact with the cotton core, and a common ground connection is achieved. At this time, the L-shaped guide tube 31 is rotated according to the ground installation position such that the end where the piston body 32 and the weight rod 33 are installed is perpendicular to the ground. Since one end of the L-shaped conduit 31 communicates with the inside of the housing 21, the L-shaped conduit 31 and the wire connection end form a U-shaped tube structure. The height of the conductive liquid in the wire connection can now be observed through the L-shaped catheter 31. However, since the other end of the L-shaped duct 31 is less likely to be made too long in consideration of the limited overall size of the skin connecting piece, the piston body 32 and the weight lever 33 are provided therein, and the maximum static friction force of the piston body 32 with the inner wall of the L-shaped duct 31 is made equal to the weight force exerted on the piston body 32 and the weight lever 33. So when the liquid level in the connecting end of the wire is too high, the piston body 32 and the weight rod 33 move upwards for a certain distance at this time, and the piston body 32 stops rising when the hydraulic pressure difference between the two ends is equal to the sum of the weight force applied to the whole of the piston and the weight rod 33 and the maximum static friction force between the piston body 32 and the inner wall of the L-shaped conduit 31.
When the conductive liquid is gradually consumed, the liquid level at the connecting end of the lead is reduced, at the moment, the buoyancy of the liquid in the L-shaped conduit 31 to the piston body 32 is reduced, so that the static friction force born by the piston body 32 is gradually reduced, and when the liquid in the L-shaped conduit 31 loses buoyancy to the piston body 32, the direction of the maximum static friction force of the piston body 32 is upward. Since the maximum static friction is equal to the weight of the piston body 32 and the weight rod 33 as a whole. When the liquid level in the L-shaped duct 31 continues to drop, the inner space of the L-shaped duct 31 increases so that the atmospheric pressure is smaller than the external air pressure, so that the piston body 32 moves downward under the atmospheric pressure, so that the height and the remaining amount of the conductive liquid in the housing 21 and in the wire connection end can be observed through the position of the piston body 32.
When the residual quantity of the conductive liquid in the wire connection end is insufficient, the wire connection end needs to be replenished with liquid. In a specific operation, the pressing plate 52 is pulled up first, so that the opening supporting plate 61 is separated from the position where the arc plate 56 is located, and the arc plate 56 is separated from the housing 21. Then, the connection port of the wire connection end is inserted into the container containing the conductive liquid, which floods the connection port portion, and then the pressing plate 52 is pressed down again so that the space behind the opening supporting plate 61 communicates with the conductive liquid. At this time, the stretching cylinder 4 is pulled upwards, so that the space between the bottom plate 41 and the opening supporting plate 61 is enlarged, then the conductive liquid is sucked into the space between the bottom plate 41 and the opening supporting plate 61, after the washing liquid is completed, the pressing plate 52 is lifted, the opening supporting plate 61 is separated from the connection opening, the communication between the inner space of the wire connecting end and the outside is cut off, and the wire connecting end is taken out from the conductive liquid and inserted into the shell 21.
Initially, the conductive liquid is consumed, so that the air space between the opening supporting plate 61 and the bottom plate 41 is increased, and the stretching cylinder 4 and the connection opening can slide, so that the stretching cylinder 4 slowly descends until the bottom of the stretching cylinder 4 abuts against the limiting ring 55 on the communicating cylinder. At this time, as the conductive liquid continues to be consumed, negative pressure occurs between the opening supporting plate 61 and the bottom plate 41, so that the conductive liquid is difficult to flow out smoothly. So in this application, an adjusting bolt 63 is further disposed on the bottom plate 41, and the adjusting bolt 63 can be screwed out, so that the cavity of the wire connection end is communicated with the outside.
However, due to the negative pressure in the cavity of the wire connection end, the adjusting bolt 63 is difficult to screw out upwards, so the diameter of the tail 633 of the adjusting bolt 63 is larger than that of the neck 632, and the adjusting bolt 63 is screwed downwards when in use, so that the tail 633 is separated from the bottom plate 41, and air can enter the cavity through the gap between the neck 632 and the bottom plate 41. In addition, since the adjusting bolt 63 is slidably connected with the metal conductive rod 6, the adjusting bolt 63 does not naturally fall down, and the head 631 is covered on the bottom plate 41.
Therefore, in use, the electrode fills water to the connecting end of the lead, then fixes the skin connecting piece on the skin, then connects the connecting end of the lead with the skin fixing piece, observes the residual quantity of the conductive liquid through the L-shaped conduit 31, and supplements the liquid in time.
Therefore, unlike the existing clip-type or magic tape-type ground wire, the ground wire electrode can be directly connected to any part of a body, so that the ground wire can be arranged between the stimulating electrode and the recording electrode in the electromyography operation specification. The ground wire electrode fixing mode that this application mentioned is simple and convenient, has moreover and can initiatively stay the conductive liquid, and can initiatively observe the surplus of conductive liquid, in time carries out the effect of adding to the conductive liquid. When the collection point needs to be replaced, the position is also convenient to replace.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention and the scope of the embodiments, which are intended to be covered by the claims and specification.
Claims (9)
1. A ground wire electrode for electromyography, comprising a connecting wire, characterized by further comprising:
the skin connecting piece is fixed on the skin and is contacted with the skin;
the lead connecting end is electrically connected with the connecting wire and detachably connected with the skin connecting piece;
the wire connection terminal includes:
one end of the connector is detachably connected with the skin connecting sheet;
one end of the stretching cylinder is sleeved on the other end of the connector and is in sliding connection with the outer wall of the connector;
one end of the extension rod is arranged on the outer wall of the connector and is fixedly connected with the connector;
the metal conductive rod is inserted into the connector and the stretching cylinder, is connected with the connector and the stretching cylinder in a sliding manner and is electrically connected with the connecting wire;
the compression bar is arranged at the other end of the extension bar, hinged with the extension bar and propped against one end of the metal conductive rod;
the skin connecting piece includes: the ground wire connecting shell is used for being connected with the wire connecting end and contacted with the skin; the adhesive tape is fixedly arranged on the side surface of the ground wire connecting shell and used for fixing the ground wire connecting shell on the skin; the ground wire connection shell includes: the shell is of a cylindrical structure and is fixedly connected with the adhesive tape; the cover body is arranged at one end of the shell and is detachably connected with the shell; the cotton core is arranged in the shell, fixedly connected with the shell, extends out from the other end of the shell and is contacted with the skin; the liquid level observation structure is arranged on the shell, is rotationally connected with the shell, is communicated with the inside of the shell and is used for observing the liquid level; and the shell is internally provided with a limiting piece, and the limiting piece is fixedly connected with the shell and is used for limiting the cotton core.
2. The ground electrode for electromyography in claim 1, wherein said liquid level observation structure comprises:
the L-shaped conduit is a hollow tube, and one end of the L-shaped conduit is rotationally connected with the shell and is communicated with the inside of the shell;
the piston body is arranged in the other end of the L-shaped conduit and is in sliding connection with the inner wall of the L-shaped conduit;
one end of the counterweight rod is fixedly connected with the piston body.
3. The ground electrode for electromyography in claim 1, wherein said connector comprises:
the connecting cylinder is of a cylindrical structure;
the connecting port is arranged at one end of the connecting cylinder and is detachably connected with the shell;
the limiting plate is arranged in the connecting cylinder and is fixedly connected with the inner wall of the connecting cylinder;
the limiting ring is arranged on the outer wall of the connecting cylinder and is fixedly connected with the connecting cylinder;
the connecting port consists of a plurality of arc plates; one end of the arc-shaped plate is fixedly connected with the connecting cylinder, and a gap is reserved between the arc-shaped plates; the arc plate is used for extending into the shell.
4. A ground electrode for electromyography according to claim 3 wherein said metal conductive rod comprises:
one end of the rod body passes through the stretching cylinder and is positioned outside the stretching cylinder, and the other end of the rod body passes through the limiting plate and is positioned in the connecting port;
the opening supporting plate is sleeved on the rod body, fixedly connected with the rod body and connected with the inner wall of the connector in a sliding manner;
and one end of the reset spring is fixedly connected with the opening supporting plate, and the other end of the reset spring is fixedly connected with the limiting plate.
5. The ground electrode for electromyography of claim 4 wherein said stretch tube comprises:
one end of the cylinder body is sleeved on the connecting cylinder and is in sliding connection with the connecting cylinder;
the first sealing ring is arranged between the inner wall of the cylinder body and the outer wall of the connecting cylinder and is fixedly connected with the cylinder body;
the bottom plate is of an annular structure, is arranged at the other end of the cylinder, is fixedly connected with the cylinder and is in sliding connection with the metal conductive rod;
and the second sealing ring is arranged between the inner annular wall of the bottom plate and the metal conductive rod, is in sliding connection with the metal conductive rod and is fixedly connected with the bottom plate.
6. The ground electrode for electromyography of claim 5, wherein said bottom plate comprises:
the plate body is of an annular structure, the outer annular wall is fixedly connected with the cylinder body, and threads are carved on the inner annular wall;
the adjusting bolt is arranged in the inner ring of the plate body and is matched with threads on the inner ring wall of the plate body;
the adjusting bolt is provided with a through hole, and the second sealing ring is arranged on the through hole.
7. The ground electrode for electromyography of claim 6 wherein said adjusting bolt comprises:
the head is positioned outside the bottom plate and is carved with vertical lines for increasing friction force;
one end of the neck is fixedly connected with the head;
one end of the tail part is fixedly connected with the neck part and is matched with threads on the annular wall in the plate body;
the diameter of the neck is smaller than the diameter of the tail, while the diameter of the neck is smaller than the diameter of the head.
8. The ground wire electrode for electromyography according to claim 2, wherein when the other end of said L-shaped conduit is perpendicular to the ground, the weight force applied by the weight rod to the piston body is equal to the maximum static friction force between the piston body and the inner wall of the L-shaped conduit.
9. The ground wire electrode for electromyography according to claim 3, wherein two extension rods are oppositely arranged in parallel and are both arranged on the outer wall of a limiting ring of the connecting cylinder and fixedly connected with the limiting ring; the pressing plates are arranged between the extension rods and hinged with the extension rods; a hemispherical bulge is arranged on one plane of the connecting end of the pressing plate and the extension rod; the hemispherical bulges are propped against the end part of the metal conductive rod, which is positioned outside the stretching cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010961745.XA CN112089416B (en) | 2020-09-14 | 2020-09-14 | Ground wire electrode for electromyography |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961745.XA CN112089416B (en) | 2020-09-14 | 2020-09-14 | Ground wire electrode for electromyography |
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| CN112089416A CN112089416A (en) | 2020-12-18 |
| CN112089416B true CN112089416B (en) | 2024-03-01 |
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