A universal neurostimulator

Abstract

The utility model discloses a universal neurostimulator, comprising a replaceable probe front cover, a handle and a cable which are arranged in sequence from front to back; a stimulation probe assembly is fixed to the front end of the probe front cover, the stimulation probe assembly comprises two stimulation probes, and each stimulation probe comprises a stimulation electrode; a first magnet is arranged inside the probe front cover; the handle comprises a handle shell, the handle shell comprises a mounting portion and a gripping portion, two mounting cavities are arranged in the mounting portion corresponding to the two stimulation probes, a connecting assembly is arranged in the mounting cavity, and the connecting assembly is electrically connected to the cable; a second magnet is arranged in the mounting portion corresponding to the first magnet; the front part of the mounting portion has an outer contour matching the inner cavity of the probe front cover, when the probe front cover is closed to the front part of the mounting portion, the first magnet and the second magnet attract each other to fix the probe front cover, and the tail of the stimulation electrode penetrates into the corresponding mounting cavity, so that the tail end of the stimulation electrode squeezes the connecting assembly to form a passage.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a universal nerve stimulator. Background Art

[0002] A neurostimulator is a medical device in the field of electrophysiological monitoring, which is used to apply electrical stimulation to target nerve tissue. A neurostimulator generally consists of a handle, a wire, and a pair of stimulation probes. The wires are connected to the stimulation probes to conduct current stimulation.

[0003] In clinical use, stimulation probes with different electrode spacings are needed for patients of different ages; stimulation electrodes with different angles and shapes are needed for different stimulation sites.

[0004] In traditional neurostimulators, the stimulation probe and handle are injection-molded as one piece and cannot be detached. Therefore, a single neurostimulator can only have a single spacing, angle, and shape. If stimulation electrodes with different spacing, angles, and shapes are required, a different neurostimulator needs to be replaced. This greatly reduces the utilization rate of the handle and wires and increases the cost of use. Therefore, a neurostimulator that can replace the stimulation probe is very necessary.

[0005] The stimulation probes of existing neurostimulators with replaceable stimulation probes are mostly connected to the handle by means of threaded connection, snap connection or spring terminal. The threaded connection has a simple structure, but has the disadvantages of a single direction and easy slipping and wear. The snap connection has high requirements on the toughness and fatigue life of the material, has low connection strength, and is prone to deformation, fracture and failure after long-term use. The connection force and life of the spring terminal connection are poor, and the connection force will be reduced after frequent plugging and unplugging. Utility Model Content

[0006] The utility model aims at solving the problems and shortcomings of the prior art and provides a novel universal nerve stimulator.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] The utility model provides a universal nerve stimulator, comprising a replaceable probe front cover, a handle and a cable which are arranged in sequence from front to back;

[0009] A stimulation probe assembly is fixed at the front end of the probe front cover, and the stimulation probe assembly includes two stimulation probes, and each stimulation probe includes a stimulation electrode; at least one first magnet placement cavity is arranged inside the probe front cover, and a first magnet is arranged in the first magnet placement cavity;

[0010] The handle comprises a handle shell, and the handle shell comprises a mounting portion and a gripping portion arranged in sequence from front to back, two mounting cavities are arranged in the mounting portion corresponding to the two stimulation probes, and an insertion port respectively connected to the two mounting cavities is arranged on the front end surface of the mounting portion corresponding to the two stimulation probes, and a connection assembly is arranged in each of the mounting cavities, and the connection assembly is electrically connected to the cable; a second magnet placement cavity is arranged in the mounting portion corresponding to the first magnet placement cavity, and a second magnet is arranged in the second magnet placement cavity;

[0011] The front portion of the mounting portion has an outer contour that matches the inner cavity of the probe front cover; when the probe front cover is closed onto the front portion of the mounting portion, the first magnet and the second magnet are correspondingly arranged and attract each other to fix the probe front cover; the tail end of the stimulation electrode passes through the insertion port into the corresponding mounting cavity, so that the tail end of the stimulation electrode squeezes the connecting assembly to form a passage.

[0012] Optionally, the stimulation electrode is wrapped with a surface insulating layer, and the rear part of each stimulation electrode wrapped with the surface insulating layer is inserted into and fixed in the probe front cover, and the front end and the tail end of the stimulation electrode extend out of the surface insulating layer; the connection assembly is composed of a first metal sheet, a metal spring and a second metal sheet connected in sequence from front to back, and the second metal sheets in the two installation cavities are respectively welded and connected to the corresponding two branch lines of the cable arranged in the holding part; when the probe front cover is closed to the front of the installation part, the first metal spring is squeezed by the tail end of the stimulation electrode and connected to the stimulation electrode to form a passage.

[0013] Optionally, positive and negative pole indication marks are provided on the outer surface of one rear side of the mounting portion corresponding to the two mounting cavities; the positive and negative pole indication marks include a positive pole indication mark and a negative pole indication mark, and the second metal sheets in the two mounting cavities corresponding to the positive pole indication mark and the negative pole indication mark are respectively welded and connected to the red line and the black line of the branch line.

[0014] Optionally, there are multiple types of probe front covers, and each type of probe front cover is equipped with a different stimulation probe assembly, and the stimulation probe assemblies include a wide-pitch felt stimulation probe assembly, a wide-pitch metal stimulation probe assembly, a narrow-pitch felt stimulation probe assembly and a narrow-pitch metal stimulation probe assembly; the front ends of the stimulation electrodes of the two wide-pitch felt stimulation probes of the wide-pitch felt stimulation probe assembly and the two narrow-pitch felt stimulation probes of the narrow-pitch felt stimulation probe assembly are both provided with felt; the front ends of the stimulation electrodes of the two narrow-pitch felt stimulation probes of the narrow-pitch felt stimulation probe assembly and the two narrow-pitch metal stimulation probes of the narrow-pitch metal stimulation probe assembly are bent in a direction close to each other to form a narrow spacing.

[0015] Optionally, the felt is a hard wool felt soaked in physiological saline.

[0016] Optionally, the spacing between the front ends of the stimulation electrodes of the two wide-pitch felt stimulation probes of the wide-pitch felt stimulation probe assembly and the two wide-pitch metal stimulation probes of the wide-pitch metal stimulation probe assembly is 2cm-3cm, and the spacing between the front ends of the stimulation electrodes of the two narrow-pitch felt stimulation probes of the narrow-pitch felt stimulation probe assembly and the two narrow-pitch metal stimulation probes of the narrow-pitch metal stimulation probe assembly is 1cm-1.5cm.

[0017] Optionally, a wire fixing block is provided at the end of the cable connecting the branch line, a matching wire fixing groove is provided in the gripping portion near the tail end, and the wire fixing block is limited and fixed in the wire fixing groove; a connector is provided at the end of the cable away from the branch line.

[0018] Optionally, the handle shell includes a handle upper shell and a handle lower shell, the mounting cavity and the second magnet placement cavity are arranged at the front end inner of the mounting portion of the handle upper shell, the positive and negative pole indication marks are arranged on the outer surface of the rear end of the mounting portion of the handle upper shell corresponding to the mounting cavity; the second magnet placement cavity is arranged at the front end inner of the mounting portion of the handle lower shell.

[0019] Optionally, a screw column is provided at the front end of the mounting portion of the upper shell of the handle, and a screw hole is provided at the front end of the mounting portion of the lower shell of the handle. The lower shell of the handle is locked and fixed to the upper shell of the handle by locking the screw column with a screw passing through the screw hole.

[0020] Optionally, a buckle is provided on the inner edge of the gripping portion of the upper handle shell, a slot is provided on the inner edge of the gripping portion of the lower handle shell corresponding to the buckle, and the upper handle shell and the lower handle shell are buckled and connected with the slot via the buckle.

[0021] Optionally, the stimulation electrode is made of medical 304 stainless steel or gold-plated copper, and the stimulation electrode is formed by machining or metal powder injection molding.

[0022] The positive and progressive effects of the utility model are:

[0023] The universal neurostimulator provided by the utility model is provided with a replaceable probe front cover, so that flexible switching of stimulation probes of different materials, spacings or shapes arranged on the probe front cover can be achieved. The probe front cover is covered on the front end of the handle and is fixed by attraction through magnets arranged in the probe front cover and the handle. At the same time, the stimulation electrode of the stimulation probe is abutted and connected with the connecting assembly in the handle. The connection is stable and reliable, the operation is simple, and the installation is easy to plug and unplug, which greatly reduces the operation time and the patient's wound exposure time; the disassembly and installation of the stimulation probe itself is avoided, and the service life is extended. Even if the stimulation probe is frequently replaced, it will not affect the transmission of electrical signals, thereby improving the success rate of diagnosis or surgery; the handle and cable are reusable to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a universal neural stimulator according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the disassembly of a universal neurostimulator according to an embodiment of the utility model;

[0026] Figure 3 (a)-(d) are schematic diagrams of various stimulation probe assemblies according to an embodiment of the present invention;

[0027] Figure 4 A cross-sectional view of the connection of stimulation electrodes of a universal neurostimulator according to an embodiment of the utility model;

[0028] Figure 5 It is a partial cross-sectional view of the connection between the upper shell and the lower shell of the handle of the universal neurostimulator according to the embodiment of the utility model;

[0029] Figure 6 This is a cross-sectional view of the upper shell and lower shell of the handle of a universal neurostimulator and the front cover of the probe according to an embodiment of the present utility model.

[0030] In the figure:

[0031] 1. Felt; 2. Stimulation probe; 2-1. Wide-pitch felt stimulation probe; 2-2. Wide-pitch metal stimulation probe; 2-3. Narrow-pitch felt stimulation probe; 2-4. Narrow-pitch metal stimulation probe; 2-5. Stimulation electrode; 3. Surface insulation layer; 4. Probe front cover; 4-1. Anti-slip pattern; 4-2. First magnet placement cavity; 5. Handle lower shell; 5-1. Second magnet placement cavity; 5-2. Screw hole; 6. Handle upper shell; 6-1. Positive and negative pole indicator mark; 6-2. Screw column; 6-3. Buckle; 6-4. Wire fixing groove; 6-5. Second magnet placement cavity; 7. Cable; 7-1. Wire fixing block; 7-2. Branch line; 8. Connector; 9. Magnet; 9-1. First magnet; 9-2. Second magnet; 10. Connection assembly; 10-1. First metal sheet; 10-2. Metal spring; 10-3. Second metal sheet; 11. Screw. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-Figure 6 This embodiment provides a universal neurostimulator, including a replaceable probe front cover 4, a handle and a cable 7 arranged in sequence from front to back.

[0034] A stimulation probe assembly is fixed to the front end of the probe front cover 4, and the stimulation probe assembly includes two stimulation probes 2. Each stimulation probe 2 includes a stimulation electrode 2-5. The stimulation electrode 2-5 is wrapped with a surface insulating layer 3. The rear part of each stimulation electrode 2-5 wrapped with the surface insulating layer 3 is inserted into and fixed in the probe front cover 4, and the front end and tail of the stimulation electrode 2-5 extend out of the surface insulating layer 3; at least one first magnet placement cavity 4-2 is arranged inside the probe front cover 4, and a first magnet 9-1 is arranged in the first magnet placement cavity 4-2.

[0035] In a specific implementation, the stimulation probe 2 and the probe front cover 4 are fixed by injection molding, the surface insulation layer 3 adopts a heat shrink tube, and the outer surface of the probe front cover 4 is provided with anti-slip grooves 4-1 to increase the friction when plugging, installing or removing the probe front cover 4, which is convenient for operation.

[0036] The handle includes a handle shell, which includes a mounting portion and a holding portion arranged in sequence from front to back. Two mounting cavities are arranged in the mounting portion corresponding to the two stimulation probes 2. The front end surface of the mounting portion is provided with insertion ports respectively connected to the two mounting cavities corresponding to the two stimulation probes 2. A connecting assembly 10 is arranged in each mounting cavity. The connecting assembly 10 is composed of a first metal sheet 10-1, a metal spring 10-2 and a second metal sheet 10-3 connected in sequence from front to back. The second metal sheets 10-3 in the two mounting cavities are respectively welded and connected to the corresponding two branch lines 7-2 of the cable 7 arranged in the holding portion; second magnet placement cavities 5-1 and 6-5 are arranged in the mounting portion corresponding to the first magnet placement cavity 4-2, and second magnets 9-2 are arranged in the second magnet placement cavities 5-1 and 6-5.

[0037] In a specific implementation, the first magnet 9-1 is glued and fixed in the first magnet placement cavity 4-2, and the second magnet 9-2 is glued and fixed in the second magnet placement cavities 5-1 and 6-5.

[0038] The front part of the mounting portion has an outer contour matching the inner cavity of the probe front cover 4; the outer surface of one side of the rear part of the mounting portion is provided with positive and negative pole indication marks 6-1 corresponding to the two mounting cavities.

[0039] In a specific implementation, by holding the probe front cover 4, the probe front cover 4 is closed to the front of the mounting portion, at which time the first magnet 9-1 and the second magnet 9-2 are arranged correspondingly and attract each other to fix the probe front cover 4; the tail of the stimulation electrode 2-5 passes through the insertion port into the corresponding mounting cavity, and the first metal spring 10-1 is squeezed by the tail end of the stimulation electrode 2-5 and connected to the stimulation electrode 2-5 to form a passage. The stimulation electrode 2-5 is connected to the wire 7 through the first metal sheet 10-1, the spring 10-2 and the second metal sheet 10-3. The spring 10-2 can ensure the stability of the magnetic connection, and an assembly tolerance margin is left between the stimulation electrode 2-5 and the first metal sheet 10-1.

[0040] Please refer to Fig. 3. In some embodiments, the probe front cover 4 is of multiple types, and each probe front cover 4 is provided with a different stimulation probe assembly, and the stimulation probe assembly includes a wide-pitch felt stimulation probe assembly, a wide-pitch metal stimulation probe assembly, a narrow-pitch felt stimulation probe assembly, and a narrow-pitch metal stimulation probe assembly; the front ends of the stimulation electrodes 2-5 of the two wide-pitch felt stimulation probes 2-1 of the wide-pitch felt stimulation probe assembly and the two narrow-pitch felt stimulation probes 2-3 of the narrow-pitch felt stimulation probe assembly are both provided with felt 1; the front ends of the stimulation electrodes 2-5 of the two narrow-pitch felt stimulation probes 2-3 of the narrow-pitch felt stimulation probe assembly and the two narrow-pitch metal stimulation probes 2-4 of the narrow-pitch metal stimulation probe assembly are bent toward each other to form a narrow spacing. The probe front cover 4 is detachably connected to the handle, and each set of neurostimulators only needs to be equipped with one handle and multiple probe front covers 4, which reduces the number of handles and saves materials and costs.

[0041] In a specific implementation, the felt 1 is a hard wool felt soaked in physiological saline.

[0042] In some embodiments, the distance between the front ends of the stimulation electrodes 2-5 of the two wide-pitch felt stimulation probes 2-1 of the wide-pitch felt stimulation probe assembly and the two wide-pitch metal stimulation probes 2-2 of the wide-pitch metal stimulation probe assembly is 2cm-3cm, and the distance between the front ends of the stimulation electrodes 2-5 of the two narrow-pitch felt stimulation probes 2-3 of the narrow-pitch felt stimulation probe assembly and the two narrow-pitch metal stimulation probes 2-4 of the narrow-pitch metal stimulation probe assembly is 1cm-1.5cm. The wide-pitch stimulation probe assembly is used for adults, and the narrow-pitch stimulation probe assembly is used for children; the felt 1 has a lower skin contact resistance than the metal head of the stimulation electrode 2-5, has better conductivity, reduces the stimulation voltage, and relieves the patient's pain.

[0043] In some embodiments, the positive and negative pole indicator marks 6-1 include a positive pole indicator mark and a negative pole indicator mark, and the second metal sheet 10-3 in the two installation cavities corresponding to the positive pole indicator mark and the negative pole indicator mark are respectively welded to the red line and the black line of the branch line 7-2.

[0044] In some embodiments, the positive and negative pole indication marks 6 - 1 are printed on the handle by silk screen printing.

[0045] In some embodiments, a wire fixing block 7-1 is provided at the end of the cable 7 connected to the branch line 7-2, and a matching wire fixing groove 6-4 is provided near the tail end in the gripping portion, and the wire fixing block 7-1 is limited and fixed in the wire fixing groove 6-4; a connector 8 is provided at the end of the cable 7 away from the branch line 7-2, and the connector 8 is a common medical equipment interface DIN type or LEMO type interface. The connector 8 can be connected to a nerve stimulator, and when the stimulation electrodes 2-5 or the felt 1 are in contact with human skin, the stimulation current is transmitted to the human body.

[0046] In some embodiments, the handle shell includes a handle upper shell 6 and a handle lower shell 5, and an installation cavity and a second magnet placement cavity 6-5 are set at the front end of the installation part of the handle upper shell 6, and a positive and negative pole indication mark 6-1 is set on the outer surface of the rear end of the installation part of the handle upper shell 6 corresponding to the installation cavity; a second magnet placement cavity 5-1 is set at the front end of the installation part of the handle lower shell.

[0047] In a specific implementation, the handle shell is made of common engineering plastics such as PVC, PC, ABS, etc. The handle upper shell 6 and the handle lower shell 5 are formed by mold injection molding. The handle upper shell 6 and the handle lower shell 5 are connected by screws or snaps, and ultrasonic welding can also be used.

[0048] In some embodiments, a screw column 6-2 is provided at the front end of the mounting portion of the handle upper shell 6, and a screw hole 5-2 is provided at the front end of the mounting portion of the handle lower shell 5. The handle lower shell 5 is locked and fixed to the handle upper shell 6 by locking the screw column 6-2 with a screw 11 passing through the screw hole 5-2.

[0049] In some embodiments, a buckle 6-3 is provided on the inner edge of the gripping portion of the upper handle shell 6, and a slot is provided on the inner edge of the gripping portion of the lower handle shell 5 corresponding to the buckle 6-3, and the upper handle shell 6 and the lower handle shell 5 are connected by buckling the buckle 6-3 and the slot.

[0050] In some implementation examples, anti-skid patterns or silicone anti-skid pads are provided on the outer surface of the grip portion to increase friction when gripping and facilitate operation.

[0051] In some implementation examples, the grip portion has a streamlined design that conforms to ergonomic design, thereby improving the comfort of gripping.

[0052] In some embodiments, the material of the stimulation electrode 2-5 is medical 304 stainless steel or gold-plated copper. The stimulation electrode 2-5 is formed by machining or metal powder injection molding. 304 stainless steel and gold-plated copper have the advantages of good conductivity, good biocompatibility, wear resistance, corrosion resistance and oxidation resistance. They can cope with the corrosion of salt water, alcohol, and sweat in actual use, and will not be toxic to the human body.

[0053] In some embodiments, the stimulation electrodes 2 - 5 can also be obtained by plating a metal film on the surface of a plastic injection molded part.

[0054] In some embodiments, the first metal sheet 10 - 1 , the spring 10 - 2 , and the second metal sheet 10 - 3 are all made of 304 stainless steel.

[0055] In some embodiments, the first magnet 9 - 1 and the second magnet 9 - 2 are both permanent magnets.

[0056] In summary, the universal neurostimulator provided by the utility model is provided with a replaceable probe front cover 4, so as to realize flexible switching of stimulation probes of different materials, spacings or shapes provided on the probe front cover 4. The probe front cover 4 covers the front end of the handle and is fixed by attraction between the probe front cover 4 and the magnet 9 provided in the handle. At the same time, the stimulation electrodes 2-5 of the stimulation probe 2 are abutted and connected with the connecting assembly 10 in the handle. The connection is stable and reliable, the operation is simple, and the installation is easy to plug and unplug, which greatly reduces the operation time and the patient's wound exposure time; the disassembly and installation of the stimulation probe 2 itself is avoided, and the service life is extended. Even if the stimulation probe 2 is frequently replaced, it will not affect the transmission of electrical signals, thereby improving the success rate of diagnosis or surgery; the handle and cable 7 are reusable to reduce costs.

[0057] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A universal neurostimulator, characterized in that: It includes a replaceable probe front cover, a handle and a cable which are arranged in sequence from front to back; A stimulation probe assembly is fixed at the front end of the probe front cover, and the stimulation probe assembly includes two stimulation probes, and each stimulation probe includes a stimulation electrode; at least one first magnet placement cavity is arranged inside the probe front cover, and a first magnet is arranged in the first magnet placement cavity; The handle comprises a handle shell, and the handle shell comprises a mounting portion and a gripping portion arranged in sequence from front to back, two mounting cavities are arranged in the mounting portion corresponding to the two stimulation probes, and an insertion port respectively connected to the two mounting cavities is arranged on the front end surface of the mounting portion corresponding to the two stimulation probes, and a connection assembly is arranged in each of the mounting cavities, and the connection assembly is electrically connected to the cable; a second magnet placement cavity is arranged in the mounting portion corresponding to the first magnet placement cavity, and a second magnet is arranged in the second magnet placement cavity; The front portion of the mounting portion has an outer contour that matches the inner cavity of the probe front cover; when the probe front cover is closed onto the front portion of the mounting portion, the first magnet and the second magnet are correspondingly arranged and attract each other to fix the probe front cover; the tail end of the stimulation electrode passes through the insertion port into the corresponding mounting cavity, so that the tail end of the stimulation electrode squeezes the connecting assembly to form a passage.

2. The universal neurostimulator according to claim 1, characterized in that: The stimulation electrodes are wrapped with a surface insulating layer, the rear portion of each stimulation electrode wrapped with the surface insulating layer is inserted into and fixed in the front cover of the probe, and the front end and the tail of the stimulation electrode extend out of the surface insulating layer; The connection assembly is composed of a first metal sheet, a metal spring, and a second metal sheet connected in sequence from front to back, and the second metal sheets in the two installation cavities are respectively welded and connected to two corresponding branch lines of the cable arranged in the gripping portion; When the probe front cover is closed onto the front of the mounting portion, the first metal sheet is squeezed by the tail end of the stimulation electrode and connected to the stimulation electrode to form a passage.

3. The universal neurostimulator according to claim 2, characterized in that: The outer surface of one side of the rear portion of the mounting portion is provided with positive and negative pole indication marks corresponding to the two mounting cavities; the positive and negative pole indication marks include a positive pole indication mark and a negative pole indication mark, and the second metal sheets in the two mounting cavities corresponding to the positive pole indication mark and the negative pole indication mark are respectively welded and connected to the red line and the black line of the branch line.

4. The universal neural stimulator according to claim 1, characterized in that: There are multiple types of probe front covers, and each type of probe front cover is equipped with a different stimulation probe assembly. The stimulation probe assemblies include a wide-pitch felt stimulation probe assembly, a wide-pitch metal stimulation probe assembly, a narrow-pitch felt stimulation probe assembly and a narrow-pitch metal stimulation probe assembly; the front ends of the stimulation electrodes of the two wide-pitch felt stimulation probes of the wide-pitch felt stimulation probe assembly and the two narrow-pitch felt stimulation probes of the narrow-pitch felt stimulation probe assembly are both provided with felt; the front ends of the stimulation electrodes of the two narrow-pitch felt stimulation probes of the narrow-pitch felt stimulation probe assembly and the two narrow-pitch metal stimulation probes of the narrow-pitch metal stimulation probe assembly are bent in a direction close to each other to form a narrow spacing.

5. The universal neural stimulator according to claim 4, characterized in that: The felt is a hard wool felt soaked in physiological saline.

6. The universal neural stimulator according to claim 4, characterized in that: The spacing between the front ends of the stimulation electrodes of the two wide-pitch felt stimulation probes of the wide-pitch felt stimulation probe assembly and the two wide-pitch metal stimulation probes of the wide-pitch metal stimulation probe assembly is 2cm-3cm; the spacing between the front ends of the stimulation electrodes of the two narrow-pitch felt stimulation probes of the narrow-pitch felt stimulation probe assembly and the two narrow-pitch metal stimulation probes of the narrow-pitch metal stimulation probe assembly is 1cm-1.5cm.

7. The universal neural stimulator according to claim 2, characterized in that: A wire fixing block is arranged at the end of the cable connecting the branch line, a matching wire fixing groove is arranged near the tail end in the gripping part, and the wire fixing block is fixed in the wire fixing groove; a connector is arranged at the end of the cable away from the branch line.

8. The universal neural stimulator according to claim 3, characterized in that: The handle shell includes an upper handle shell and a lower handle shell, the installation cavity and the second magnet placement cavity are arranged at the front end of the installation part of the upper handle shell, the positive and negative pole indication marks are arranged on the outer surface of the rear end of the installation part of the upper handle shell corresponding to the installation cavity; the second magnet placement cavity is arranged at the front end of the installation part of the lower handle shell.

9. The universal neural stimulator according to claim 8, characterized in that: A screw column is arranged at the front end of the mounting part of the upper shell of the handle, and a screw hole is arranged at the front end of the mounting part of the lower shell of the handle. The lower shell of the handle is locked and fixed to the upper shell of the handle by locking the screw column with a screw passing through the screw hole.

10. The universal neural stimulator according to claim 8, characterized in that: The inner edge of the gripping portion of the upper handle shell is provided with a buckle, the inner edge of the gripping portion of the lower handle shell is provided with a slot corresponding to the buckle, and the upper handle shell and the lower handle shell are buckled and connected with the buckle and the slot.

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