CN111313185A

CN111313185A - Electrode wire with shielding and negative pressure suction functions

Info

Publication number: CN111313185A
Application number: CN202010122620.8A
Authority: CN
Inventors: 谢春虎; 朱胜清
Original assignee: Shenzhen Xft Medical Ltd
Current assignee: Shenzhen Xft Medical Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-06-19
Anticipated expiration: 2040-02-27
Also published as: CN111313185B

Abstract

The invention provides an electrode wire with shielding and negative pressure suction functions, which comprises a main machine end connecting terminal, a movable middle stop, a wire main body, an electrode cup end connecting terminal, a gas removing pipe and an outer cover forming a gas path.

Description

Electrode wire with shielding and negative pressure suction functions

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to an electrode wire with shielding and negative pressure suction functions.

Background

The negative electrode is widely applied to various electrotherapy devices at present, and has the characteristics of convenient use, long service life and the like compared with the traditional hydrogel electrode. Negative electrode's electrode line has two kinds of passageways of gas circuit and circuit, has signal line and shielded wire among the circuit passageway, the electrode line that prior art exists, like patent application number: CN201910083767 relates to an electrode wire, as shown in fig. 1, circuit parcel gas circuit, the gas circuit has special trachea in the centre, signal line and shielding wire parcel are outside the trachea, outmost be outer quilt, because there is the diameter of special trachea electrode wire just very big, the wire rod is not soft enough, user experience is not good enough, the shielding wire is lived to outer parcel, because outer quilt is soft glue materials such as PVC, the concave-convex trace of shielding wire can be shown on outer quilt surface, influence the outward appearance, it is not high to seem the grade of product, can not reach the maximize of product value. In addition, as shown in fig. 2, in the electrode wire in the prior art, an air gap exists between the shielding terminal of the main machine terminal of the matched device and the insulating cylinder, and an air gap also exists between the signal terminal and the insulating cylinder, so that air can leak through the air gap, and the air tightness is not good.

Disclosure of Invention

Aiming at the defects, the invention provides the electrode wire with the shielding and negative pressure suction functions, the problems are solved, the air pipe is removed, the air passage is formed by the outer cover, the diameter of the wire is small, the flexibility is good, the structure of the signal terminal is changed, the sealing ring is added at the front end of the signal terminal, and the air tightness is good. The invention is realized by the following technical scheme.

The utility model provides an electrode line of utensil shielding and negative pressure suction function, the electrode line includes host computer end connecting terminal, portable well fender, wire rod main part and electrode cup end connecting terminal, wherein, host computer end connecting terminal is connected with supporting device host computer end terminal, the host computer end connecting terminal other end links to each other with the terminal of electrotherapy host computer, switch-on circuit and gas circuit, signal of telecommunication and atmospheric pressure reach electrode cup end connecting terminal through the conveying of wire rod main part, electrode cup end connecting terminal links to each other with the negative pressure electrode cup, the negative pressure electrode cup adsorbs in the human body, the outermost of wire rod main part is the quilt, the quilt inside forms the gas circuit for hollow structure, atmospheric pressure transmits in the gas circuit, the circuit that shielded wire and signal line are constituteed is located in the middle of the gas circuit, the signal line is wrapped up.

Furthermore, the electrode wires can be one group, two groups or multiple groups, and the two groups or multiple groups are connected by a movable middle gear.

Further, the host end connecting terminal comprises a cylinder male seat, a protection cover upper cover, a protection cover lower cover, an isolation ring, a third crown spring, a first crown spring and a sealing head, wherein the cylinder male seat is inserted into the cylinder female seat, the protection cover upper cover is embedded into the cylinder male seat, the protection cover lower cover, the isolation ring, the third crown spring, the first crown spring, the sealing head, the protection cover upper cover and the protection cover lower cover are matched up and down to tightly wrap the isolation ring, the third crown spring, the first crown spring and the air pipe joint, the third crown spring, the isolation ring and the first crown spring are sequentially arranged along a central line from left to right.

Further, electrode cup end connecting terminal includes the female seat of drum, the female seat of signal connector, and the hat spring, and wherein the outer of the female seat parcel of drum in the quilt covers the female seat of signal connector and hat spring, does not have the clearance between the female seat of drum and the quilt between the two, and the hat spring is with the female seat of central line embedding signal connector, and the closed air flue of electrode cup end comprises electrode cup cover, the public seat of signal connector, electrically conductive cylinder and electrode disc.

Further, the invention also comprises a matching device host terminal of the electrode wire with the functions of shielding and negative pressure suction, wherein the matching device host terminal comprises a cylindrical female seat, a shielding terminal, an insulating cylinder, a signal terminal, a first sealing ring, a large nut and a small nut, the cylindrical female seat is positioned at a signal port of the host and is a part of the host, the shielding terminal is positioned in the center of the cylindrical female seat, the insulating cylinder is positioned between the shielding terminal and the signal terminal, the insulating cylinder is assembled along the slotting direction of the shielding terminal, and the first sealing ring 005 is positioned at the head of the signal terminal. Big nut is at the afterbody of shielding terminal, and little nut is at the afterbody of signal terminal, big nut lock solid shielded wire in the afterbody of shielding terminal, and little nut lock solid signal line is in the afterbody of signal terminal, and the first sealing washer of signal terminal front end cover is located between sealed head and the signal terminal, and first sealing washer is interference fit with sealed head and signal terminal, by outer quilt, sealed head, first sealing washer, signal terminal forms closed air flue.

The negative electrode cup comprises an electrode cup cover, a signal connector male seat, a second sealing ring, a conductive cylinder, an electrode disc and water absorption cotton, wherein the signal connector male seat of the negative electrode cup is inserted into a connecting terminal at the end of the negative electrode cup, the signal connector male seat is in tight contact with a cylinder female seat and is in interference fit, the second sealing ring is arranged between the connector male seat and the cylinder female seat and is in interference fit with the connector male seat and the cylinder female seat, the electrode cup cover, the conductive cylinder, the electrode disc and the water absorption cotton are sequentially arranged from top to bottom, and the conductive cylinder and the electrode disc are connected through a laser welding process.

Drawings

FIG. 1 is a cross-sectional view of a prior art electrode wire;

FIG. 2 is a diagram of a host computer of a prior art companion device;

FIG. 3 is a structural diagram of an electrode wire with shielding and negative pressure suction functions according to the present invention;

FIG. 4 is a cross-sectional view of the electrode wire and associated apparatus of the present invention in an unassembled condition;

FIG. 5 is a cross-sectional view of the assembled state of the electrode wire and its associated apparatus of the present invention;

FIG. 5.1 is the general gas path diagram of the electrode wire and its corollary device of the present invention;

FIG. 5.11 is a detail view of a portion of the gas path of the electrode wire of the present invention in FIG. 1;

FIG. 5.12 is a detail view of a portion of the gas path of the electrode wire of the present invention FIG. 2;

fig. 5.2 electrode line circuit diagram of the present invention;

fig. 5.21 electrode line circuit detail view 1 of the invention;

fig. 5.22 electrode line circuit detail fig. 2 of the present invention;

fig. 6 is an assembled cross-sectional view of the main terminal end connection terminal of the electrode wire and the terminal end of the mating main terminal of the present invention;

FIG. 7 is a schematic diagram of a terminal structure of a main machine end of the electrode wire;

fig. 7.1 is a signal terminal structure diagram of the terminal of the main machine matched with the electrode wire of the present invention;

fig. 7.2 is a structure diagram of a shielding terminal of the host machine matched with the electrode wire of the present invention;

fig. 7.3 is a structural view of an insulating cylinder of a host terminal matched with the electrode wire of the invention;

FIG. 8 is a schematic view of a terminal block at the main end of the electrode wire of the present invention;

fig. 8.1 is a structural view of the protective upper cover of the main terminal connecting terminal of the electrode wire of the present invention;

fig. 8.2 is a structural view of a protective lower cover of a main terminal connecting terminal of the electrode wire of the invention;

FIG. 8.3 is a view showing the structure of the terminal spacer of the main terminal of the electrode wire of the present invention;

FIG. 8.4 is a diagram of the welding position of the terminal wire of the main machine end of the electrode wire of the present invention;

FIG. 9 is an assembled cross-sectional view of the electrode cup end connection terminal and negative pressure electrode cup of the electrode wire of the present invention;

FIG. 10 is a view of the electrode cup end connection terminal of the electrode wire of the present invention;

fig. 11 is a structural view of the negative electrode cup of the present invention.

Detailed Description

As shown in fig. 3, 4 and 5, the electrode wire comprises a main machine end connecting terminal 10, a movable middle stop 20, a wire body 30 and an electrode cup end connecting terminal 40, and a main machine end terminal 00 and a negative electrode cup 50 of a matched device are connected with the electrode wire.

In fig. 3, the electrode wires are 3 groups, and in practical application, there may be one group, two groups or more groups, and the two groups or more groups are connected by the movable middle stop 20.

The main machine terminal 00 of the matching device is connected with the main machine terminal connecting terminal 10, the other end of the main machine terminal connecting terminal 10 is connected with the terminal of the electrotherapy main machine, a circuit and an air path are connected, an electric signal and air pressure reach the electrode cup terminal connecting terminal 40 through the transmission of the wire main body 30, the electrode cup terminal connecting terminal 40 is connected with the negative electrode cup 50, and the negative electrode cup 50 is adsorbed on a human body.

The outermost of wire rod main part 30 is outer by 31, and the inside of outer by 31 is hollow structure and forms the gas circuit, and atmospheric pressure transmits in the gas circuit, and the circuit that shielded wire 32 and signal line 33 are constituteed is located in the middle of the gas circuit, and signal line 33 is lived in the parcel of shielded wire 32, and the electric signal also transmits in the gas circuit, and outer by 31 is soft materials such as PVC, TPU. By outer by direct formation gas circuit, no longer add the trachea in addition, the diameter of wire rod main part can be done for a short time, and the pliability becomes good, has also reduced the cost simultaneously, and on the other hand, outer by the inside is cavity, and outer by the surface just can be done very smoothly, has promoted the grade of product, has realized the maximize of product benefit.

As shown in FIG. 5.1, the gas is sucked from the negative pressure electrode cup 50, which is vacuum-sucked, and enters the wire body 30 through the electrode cup connection terminal 40, and enters the main body after reaching the main body terminal 00 of the mating device through the main body terminal connection terminal 10

As shown in fig. 5.11, the electrode cup cover 501, the signal connector male seat 502, the conductive cylinder 504 and the electrode disc 505 form a closed air passage at the end of the electrode cup, the signal connector male seat 502 is in tight contact with the cylinder female seat 401, and is in interference fit, and the sealing ring 503 is located between the signal connector male seat 502 and the cylinder female seat 401 to form a closed air passage. The cylinder female seat 401 is wrapped on the outer layer of the outer cover 31, the cylinder female seat 401 and the outer cover 31 are made of the same soft rubber material, the compatibility of the cylinder female seat and the outer cover is good, no gap exists between the cylinder female seat and the outer cover, and a closed air passage is formed.

As shown in fig. 5.12, the outer cover 31, the sealing head 106, the sealing ring 005 and the signal terminal 004 form a closed air passage.

Referring to fig. 5.2, 5.21, 5.22, an electrical signal is introduced from a signal terminal 004 of a host terminal 00 of a mating device, the signal terminal 004 contacts with a first crown spring 1052 to form an electrical connection, a welding point 10521 is provided on the edge of the first crown spring 1052, one end of a signal line 33 is connected to the welding point 10521, the signal line 33 is electrically connected to the first crown spring 1052, the welding point 4021 is provided at the tail end of a signal connector female base 402, the other end of the signal line 33 is electrically connected to the signal connector female base 402 of an electrode cup terminal connection terminal 40 through the welding point 4021, a second crown spring 403 is embedded in the signal connector female base 402 to form an electrical connection, one end of a signal connector male base 502 of a negative electrode cup 50 contacts with the second crown spring 403 to form an electrical connection, the other end of the signal connector male base 502 is screwed into a conductive cylinder 504 to form an electrical connection, the conductive cylinder 504 is welded to, the absorbent cotton 506 is attached to the electrode disk 505 by negative pressure suction, thus forming the whole path of the electric signal.

The shielding signal is introduced from the shielding terminal 002 of the host terminal 00 of the matching device, the shielding terminal 002 is in contact with the third crown spring 1051 to form electric connection, the edge of the third crown spring 1051 is provided with a welding point 10511, one end of the shielding wire 32 is connected with the welding point 10511, the shielding wire 32 is in electric connection with the third crown spring 1051, the other end of the shielding wire 32 is stopped near the welding point 4021, the terminal point of the shielding wire 32 is sleeved with an insulating tube and is glued to seal the port, so that the reduction of the insulation impedance between the shielding signal and the electric signal due to the fact that moisture is absorbed by negative pressure is avoided.

As shown in fig. 6, 7 and 8, the host terminal is composed of a cylindrical female socket 001, a shield terminal 002, an insulating cylinder 003, a signal terminal 004, a sealing ring 005, a large nut 006 and a small nut 007. The connection terminal at the host end consists of a cylindrical male seat 101, a protective cover upper cover 102, a protective cover lower cover 103, an isolation ring 104, a third crown spring 1051, a first crown spring 1052 and a sealing head 106.

Wherein, the front end of the signal terminal 004 is sleeved with the sealing ring 005, the sealing ring 005 is located between the sealing head 106 and the signal terminal 004, the sealing ring 005 is in interference fit with the sealing head 106 and the signal terminal 004, the sealing ring 005 is made of soft rubber materials such as silicon rubber, the gas is sealed, and the airtightness is effectively ensured, which is an important difference between the present invention and the prior art, and is explained in detail below:

the cylinder female seat 001 is located at a signal port of a host machine and is a part of the host machine, the shielding terminal 002 is located at the center of the cylinder female seat 001, and the production process can be assembly or in-mold injection molding. The insulating cylinder 003 is interposed between the shield terminal 002 and the signal terminal 004, the insulating cylinder 003 is assembled in the direction of the groove of the shield terminal 002, and the seal ring 005 is located at the head of the signal terminal 004. The large nut 006 is arranged at the tail of the shielding terminal 002, the small nut 007 is arranged at the tail of the signal terminal 004, the large nut 006 locks the shielding line at the tail of the shielding terminal 002, and the small nut 007 locks the signal line at the tail of the signal terminal 004.

The shielding terminal 002, the signal terminal 004, the big nut 006 and the small nut 007 are made of metal materials such as brass and stainless steel, the sealing ring 005 is made of silicon rubber material, the cylinder female seat 001 and the insulating cylinder 003 are made of plastic materials such as ABS and PC

The cylinder male seat 101 is inserted into the cylinder female seat 001, and the cylinder male seat 101 is embedded with the upper cover 102 of the protection cover, the lower cover 103 of the protection cover, the isolation ring 104, the third crown spring 1051, the first crown spring 1052 and the sealing head 106. The upper cover 102 and the lower cover 103 are engaged to tightly wrap the isolation ring 104, the third crown spring 1051, the first crown spring 1052 and the tracheal joint. Third crown spring 1051, cage 104, first crown spring 1052, and seal head 106 are arranged in sequence from left to right along a centerline.

The third crown spring 1051, the first crown spring 1052 and the sealing head 106 are made of metal materials such as brass and stainless steel, the upper cover 102 of the protection cover, the lower cover 103 of the protection cover, the isolation ring 104 is made of plastic materials such as ABS and PC, and the cylindrical male seat 101 is made of soft rubber materials such as PVC and TPU.

As shown in fig. 7.1, the signal terminal 004 is a cylindrical hollow structure, the inside of the signal terminal is a gas channel, the front end of the signal terminal is provided with a circular groove 0041, the circular groove 0041 is a full-circle 360-degree groove, and a sealing ring is embedded in the circular groove 0041 to play a sealing role. Boss 0042 is at the middle part, and boss 0042 surfacing, and the effect of boss 0042 is for preventing that signal terminal 004 from beating the commentaries on classics. The tail end is provided with a screw hole 0043, a nut is screwed into the screw hole 0043 to fasten the signal terminal 004, and in addition, a signal wire can be fastened.

As shown in fig. 7.2, the shielding terminal 002 is a cylindrical hollow structure, the front end of the shielding terminal is opened with a notch 0021, the notch 0021 is U-shaped, and the notch 0021 is embedded into the protrusion of the insulating cylinder to prevent the insulating cylinder from rotating. There is hexagonal boss 0022 in the middle of, and hexagonal boss 0022 is the hexagon structure, prevents the not hard up rotation of shielding terminal 002 in the female seat of hexagonal boss 0022 embedding drum. The tail part is a screw opening 0023, a nut is screwed into the screw opening 0023 to fasten the shielding terminal 002, and in addition, a shielding wire can be fastened.

As shown in fig. 7.3, the insulating cylinder 003 is a cylindrical hollow structure, and has a concave 0031 at the front end, and the concave 0031 is tightly engaged with the boss of the signal terminal to prevent the signal terminal from rotating. The protrusion 0034 is fitted into the U-shaped notch of the shield terminal to prevent the insulating cylinder 003 from being rotated. The tail end is provided with a notch 0033, the side edge of the notch 0033 is provided with a protrusion 0032, and the notch 0033 and the protrusion 0032 play roles in facilitating assembly and fastening the insulating cylinder 003

As shown in fig. 8.1, the upper protection cover is in a semi-cylindrical structure, and the middle of the upper protection cover is hollowed out for assembling the crown spring and the isolation ring. The left end is recess 1021, and recess 1021 is semicircle cavity shape, and the effect of recess 1021 is the fastening sealing head. The protruding cylinder 1022 is cylindrical, the protruding cube 1023 is rectangular, and the protruding cylinder 1022 and the protruding cube 1023 are assembled with the protective lower cover to be fastened. The groove 1024 is in a semicircular hollow shape, and an isolation ring is embedded in the groove 1024. The right end is a boss 1025, the boss 1025 is in a semicircular hollow shape, and the boss 1025 is used for fixing the crown spring.

As shown in fig. 8.2, the protective lower cover is a semi-cylindrical structure with a hollow middle for assembling the crown spring and the isolation ring. The left end is a groove 1031, the groove 1031 is in a semi-circle hollow shape, and the groove 1031 is used for fastening a sealing head. Round hole 1032 is cylindrical, and square groove 1033 is the rectangle, and round hole 1032 and square groove 1033 play the fastening effect with the assembly of protection upper cover. The groove 1034 is in a semi-circular hollow shape, and a spacer ring is embedded in the groove 1034. The right end is boss 1035, boss 1035 is in semicircle cavity form, and boss 1035 is used for fixing the crown spring.

As shown in fig. 8.3, the isolating ring is a cylindrical hollow structure, the notches 1041 are opened at two sides and are bilaterally symmetrical, and the notches 1041 are used for avoiding welding points on the crown spring. The clamping grooves 1042 are positioned at two sides and are bilaterally symmetrical, and the clamping grooves 1042 are used for clamping and fixing the crown spring. Boss 1043 is in the middle to isolate the crown spring.

As shown in fig. 8.4, a weld 10511 is located at the edge of the crown spring near the cage, and the shield wire is welded at weld 10511, with the shield wire passing through notch 1044. A weld 10521 is located at the edge of the crown spring near the cage and a signal wire is welded to weld 10521. The notch 1041 serves to avoid the weld 10511 and the weld 10521 on the crown spring.

As shown in fig. 9, 10 and 11, the negative pressure cup end connection terminal is composed of a cylindrical female seat 401, a signal connector female seat 402 and a crown spring 403, and the negative pressure electrode cup is composed of an electrode cup cover 501, a signal connector male seat 502, a sealing ring 503, a conductive cylinder 504, an electrode disc 505 and absorbent cotton 506

The cylinder female seat 401 is arranged at the outermost layer and wraps the signal connector female seat 402 and the crown spring 403, and the crown spring 403 is embedded into the signal connector female seat 402 with the center line.

The cylinder female seat 401 is made of soft rubber materials such as PVC and TPU, and the signal connector female seat 402 and the crown spring 403 are made of metal materials such as brass and stainless steel.

The male connector 502 of the negative electrode cup is inserted into the connecting terminal of the negative electrode cup, the sealing ring 503 is arranged between the male connector 502 and the female cylinder seat 401, and the sealing ring 503 is in interference fit with the male connector 502 and the female cylinder seat 401 to play a sealing role. The electrode cup cover 501, the conductive cylinder 504, the electrode disc 505 and the absorbent cotton 506 are sequentially arranged from top to bottom, and the conductive cylinder 504 and the electrode disc 505 are connected by a laser welding process.

The electrode cup cover 501, the sealing ring 503 are made of soft rubber materials such as silicon rubber, the signal connector male seat 502, the conductive cylinder 504 and the electrode disc 505 are made of metal materials such as brass and stainless steel, and the absorbent cotton 506 is made of wood pulp.

Through the embodiment, the electrode wire can remove the special vent pipe, is simple in process, low in cost, small in wire diameter, good in flexibility and air tightness, and smooth in outer surface, improves the grade of a product, and maximizes the product benefit.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an utensil shielding and negative pressure suction function's electrode line, the electrode line includes host computer end connecting terminal, portable well fender, wire rod main part and electrode cup end connecting terminal, wherein, host computer end connecting terminal is connected with supporting device host computer end terminal, switch-on circuit and gas circuit, the conveying of signal of telecommunication and atmospheric pressure through the wire rod main part reaches electrode cup end connecting terminal, electrode cup end connecting terminal links to each other with the negative pressure electrode cup, the negative pressure electrode cup adsorbs in the human body, the outermost of wire rod main part is the quilt, be hollow structure formation gas circuit inside the quilt, atmospheric pressure transmits in the gas circuit, the circuit that shielded wire and signal line are constituteed is located in the middle of the gas circuit, the signal line is wrapped up in to the shielded wire, the signal of.

2. The electrode wire with shielding and negative pressure suction functions as claimed in claim 1, wherein the electrode wire can be one set, two sets or more sets, and the two sets or more sets are connected by a movable middle stop.

3. The electrode wire with shielding and negative pressure suction functions as claimed in claim 1, wherein the main body terminal connection terminal comprises a cylindrical male housing, a protective upper housing, a protective lower housing, a separation ring, a third crown spring, a first crown spring and a sealing head, wherein the cylindrical male housing is inserted into the cylindrical female housing, the protective upper housing is embedded inside the cylindrical male housing, the protective lower housing, the separation ring, the third crown spring, the first crown spring, the sealing head, the protective upper housing and the protective lower housing are engaged with each other to tightly wrap the separation ring, the third crown spring, the first crown spring and the tracheal cannula, and the third crown spring, the separation ring, the first crown spring and the sealing head are sequentially arranged along a central line from left to right.

4. The electrode wire with shielding and negative pressure suction functions as claimed in claim 1, wherein the electrode cup terminal connection terminal comprises a cylindrical female socket, a signal connector female socket, and a crown spring, wherein the cylindrical female socket is wrapped on the outer layer of the outer cover to wrap the signal connector female socket and the crown spring, no gap is formed between the cylindrical female socket and the outer cover, the crown spring is embedded into the signal connector female socket at the center line, and the closed air passage of the electrode cup terminal is composed of an electrode cup cover, a signal connector male socket, a conductive cylinder and an electrode disk.

5. The mating device main unit terminal for an electrode wire with shielding and negative pressure suction functions as claimed in any one of claims 1 to 4, wherein the mating device main unit terminal comprises a cylindrical female socket, a shielding terminal, an insulating cylinder, a signal terminal, a first sealing ring, a large nut and a small nut, wherein the cylindrical female socket is located at a signal port of the main unit and is a part of the main unit, the shielding terminal is located at the center of the cylindrical female socket, the insulating cylinder is located between the shielding terminal and the signal terminal, the insulating cylinder is assembled along the slotting direction of the shielding terminal, the first sealing ring 005 is located at the head of the signal terminal, the large nut is located at the tail of the shielding terminal, the small nut is located at the tail of the signal terminal, the large nut locks the shielding wire at the tail of the shielding terminal, the small nut locks the signal wire at the tail of the signal terminal, the front end of the signal terminal is sleeved with the first sealing ring, the first sealing ring is located between the sealing, first sealing washer is interference fit with sealed head and signal terminal, by outer quilt, sealed head, first sealing washer, signal terminal form and seal the air flue.

6. A negative electrode cup for an electrode wire with shielding and negative pressure suction functions as claimed in any one of claims 1 to 4, the negative electrode cup comprises an electrode cup cover, a signal connector male seat, a second sealing ring, a conductive cylinder, an electrode disc and absorbent cotton, wherein the signal connector male seat of the negative electrode cup is inserted into a negative pressure cup end connecting terminal, the signal connector male seat is in close contact with a cylinder female seat in an interference fit manner, the second sealing ring is arranged between the connector male seat and the cylinder female seat, the second sealing ring is in interference fit with the connector male seat and the cylinder female seat, the electrode cup cover, the conductive cylinder, the electrode disc and the absorbent cotton are sequentially arranged from top to bottom, and the conductive cylinder and the electrode disc are connected by a laser welding process.