CN111529927A

CN111529927A - Medical intermediate frequency electrode pen

Info

Publication number: CN111529927A
Application number: CN202010272245.5A
Authority: CN
Inventors: 王建明; 龙航; 祁斌; 戴迪; 李宁宁; 孙九峰
Original assignee: Shandong Silin Pharmaceutical Technology Co ltd
Current assignee: Shandong Silin Pharmaceutical Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-08-14
Anticipated expiration: 2040-04-09
Also published as: CN111529927B

Abstract

The invention relates to the field of physiotherapy instruments, and provides a medical intermediate-frequency electrode pen which comprises a pen point, a pen holder and a pen tail, wherein the pen point comprises a central electrode, a measuring electrode, a protective head, a sheath and a pen head cover; the central electrode and the measuring electrode are movably sleeved in the head protector; the exciting electrode, the receiving electrode, the electrode switch and the single-board computer are sequentially connected in series to form a measuring circuit, and the single-board computer is used for receiving electric signals for impedance measurement, converting the electric signals into digital signals and processing a plurality of groups of digital signals. Therefore, the invention carries out impedance measurement and treatment on the measured epidermis through the multipoint impedance measurement loop, and compares and displays the impedance measurement result, so that a user can quickly find the acupuncture points needing physical therapy according to the prompt and can carry out physical therapy through the pulse electrode. The invention can reduce the difficulty of searching acupuncture points for a user, improve the accuracy of point diagnosis, enhance the physical therapy effect on the affected part and provide parameterized diagnosis results for the user.

Description

Medical intermediate frequency electrode pen

Technical Field

The invention relates to the field of physiotherapy instruments and provides a medical intermediate-frequency electrode pen.

Background

The bioimpedance technique is a nondestructive detection technique for extracting biomedical information related to human physiology and pathology by using the electric characteristics and changes of biological tissues and organs, and is characterized by that it utilizes the electrodes placed on the body surface to feed a small measuring current or voltage into the detected object to detect correspondent electric impedance and its change condition, then according to different application purposes, the related physiology and pathology information can be obtained.

According to the research, the biological impedance value of the acupuncture points is lower than that of non-acupuncture points. When the human body is diseased, the biological impedance values of the corresponding acupuncture points can change, so that the health condition of the human body can be grasped simply, conveniently and intuitively by monitoring the change trend of the biological impedance values of the acupuncture points.

The theory of traditional Chinese medicine considers that the electrical pulse method is used for stimulating a meridian system, particularly acupuncture points, and the purposes of dredging the meridian, promoting local vasodilatation and accelerating blood flow speed and cell activity can be achieved. Improving pain and regulating nerve function by electrotherapy has certain curative effect. At present, electrodes directly acting on a human body have various styles such as electrode plates, needle electrodes, electrode probes and the like, the electrode plates are mainly used for human skin, and the needle electrodes and the electrode probes are mainly used for human subcutaneous tissues and are basically used for transmitting myoelectric signals and monitoring certain specific parameters of the human body.

At present, when the physiotherapy instrument is used, electrode slices and the like are pasted on a measured epidermis, because the accurate positions of acupuncture points are not clear, the error of point selection is allowed by using a large electrode patch, so that the cost is increased, the treatment effect is reduced, and the body around the measured epidermis is damaged. The diagnosis result and effectiveness of traditional Chinese medicine depend on the subjective judgment of doctors to a great extent. How to make the diagnosis index of the traditional Chinese medicine more objective and have the diagnosis reference value is a breakthrough in the development of the modern traditional Chinese medicine.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention provides a medical medium frequency electrode pen, which can determine the positions of acupuncture points through impedance, quickly align the positions to be treated with physical therapy, treat the affected part in an electric pulse manner, and provide visual numerical parameters for the diagnosis of doctors.

In order to achieve the aim, the invention provides a medical medium-frequency electrode pen which comprises a pen point, a pen holder and a pen tail, wherein the pen point and the pen holder are buckled in an interference manner, the pen tail is screwed at the end part of the pen holder, and the pen point, the pen holder and the pen tail are sequentially connected; the pen point comprises a central electrode, a measuring electrode, a protective head, a sheath and a pen point cover; one end of the sheath is movably sleeved with the protective head, the other end of the sheath is fixedly connected with the pen head cover, the central electrode is movably sleeved on the axis of the protective head, and measuring electrodes movably sleeved on the protective head are uniformly distributed around the central electrode; the penholder comprises a holder body, an electrode switch and a single board computer; the rod body contains the electrode switch and a single board computer which is used for receiving electric signals of impedance measurement, converting the electric signals into digital signals and comparing and processing a plurality of groups of digital signals; the excitation electrode, the receiving electrode, the electrode switch and the single-board computer are sequentially connected in series to form a measuring loop; the electrode switch comprises a rod body and a single-board computer, wherein the rod body is provided with a pen point, the single-board computer is fixedly connected with the rod body, and the rod body is provided with an electrode switch mounting hole for mounting the electrode switch.

According to the medical intermediate frequency electrode pen, the central electrode is provided with the measuring electrode contact and the pulse electrode, and the pulse electrode and the physiotherapy instrument form a physiotherapy loop.

According to the medical medium-frequency electrode pen, the number of the measuring electrode contacts is not less than 5.

According to the medical medium-frequency electrode pen, the pen head further comprises a head protection spring, and the head protection spring, the head protection and the sheath form a protective sleeve for the central electrode and the measuring electrode.

According to the medical intermediate-frequency electrode pen, the pen point further comprises an electrode spring and a piezoelectric crystal, wherein the electrode spring and the piezoelectric crystal are used for controlling the opening and closing of the measurement loop.

According to the medical intermediate frequency electrode pen, the constant current output by the measuring loop is 160 muA.

According to the medical intermediate frequency electrode pen, the single board computer is provided with a display for displaying digital signals.

According to the medical intermediate-frequency electrode pen, four arrow display areas, namely an upper arrow display area, a lower arrow display area, a left arrow display area, a right arrow display area and a central oval display area are arranged on the display.

According to the medical intermediate-frequency electrode pen, the display area of the display is provided with the LED backlight.

According to the medical intermediate frequency electrode pen, the pen tail is provided with an external interface used for connecting a physiotherapy instrument.

The invention carries out impedance measurement and treatment on the measured epidermis by a multipoint impedance measurement loop consisting of the exciting electrode, the receiving electrode and the single board computer, compares and displays the impedance measurement result, and instructs a user to search the position of the acupuncture point according to the prompt of the display, so that the user can quickly find the acupuncture point needing physical therapy according to the prompt and can carry out physical therapy by the pulse electrode. The invention can reduce the difficulty of searching acupuncture points for a user, improve the accuracy of point diagnosis, enhance the physical therapy effect on the affected part and provide parameterized diagnosis results for the user.

Drawings

FIG. 1 is a schematic view of an exploded structure of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of the structure of the center electrode of the present invention;

FIG. 4 is a front view of the center electrode of the present invention;

FIG. 5 is a schematic structural view of the pen tip cap of the present invention;

FIG. 6 is a schematic view of the structure of the shaft of the present invention;

FIG. 7 is a schematic view of the construction of the connector of the present invention;

FIG. 8 is a schematic illustration of the display content of the display of the present invention;

FIG. 9 is a schematic diagram of the operation of the measurement circuit of the present invention;

FIG. 10 is a schematic view of the working state of the present invention;

in the figure, 1-pen head, 11-center electrode, 111-pulse electrode, 12-measuring electrode, 121-measuring electrode contact, 122-exciting electrode, 123-receiving electrode, 13-protective head, 131-limit platform, 132-measuring electrode mounting hole, 133-center electrode mounting hole, 14-sheath, 141-limit retainer ring, 15-pen head cover, 151-spring mounting column, 152-female buckle, 16-protective head spring, 17-electrode spring, 18-piezoelectric crystal, 2-pen holder, 21-rod, 211-male buckle, 212-connector fixing hole, 213-observation port, 214-electrode switch mounting hole, 22-connector, 221-connector mounting hole, 23-electrode switch, 24-battery, 25-single board computer, 251-display, 3-pen tail, 31-external interface, 32-internal interface and 4-tested epidermis.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Referring to fig. 1, the invention comprises a pen point 1, a pen holder 2 and a pen tail 3. The pen point 1 comprises a central electrode 11, a measuring electrode 12, a protective head 13, a sheath 14, a pen point cover 15, a protective head spring 16, an electrode spring 17 and a piezoelectric crystal 18. The central electrode 11 is sleeved in the head protector 13, the head protector 13 is provided with a limiting table 131, the head protector 13 is further provided with a measuring electrode mounting hole 132 for sleeving the measuring electrode 12, and the head protector 13 is further provided with a central electrode mounting hole 133 for sleeving the central electrode 11. The sheath 14 is provided with a limiting retainer 141, and the limiting retainer 141 is matched with the limiting table 131 and used for blocking and limiting the head protector 13. The pen head cover 15 is adhered to the sheath 14 in an adhesion mode, and a hollow spring mounting column 151 is arranged on the pen head cover 15. The head protection spring 16 is sleeved on the measuring electrode 12, and the head protection spring 16 is installed between the head protection 13 and the spring installation column 151. The electrode spring 17 is arranged in the spring mounting column 151, the electrode spring 17 is arranged between the measuring electrode 12 and the piezoelectric crystal 18, the piezoelectric crystal 18 is annular, and the piezoelectric crystal 18 is bonded on the pen point cover 15.

Preferably, the head guard 13 is provided with a measuring electrode mounting hole 132. The measuring electrode 12 can slide freely in the measuring electrode mounting hole 132, and the measuring electrode mounting hole 132 can be pushed by the head protection spring 16 when the measuring electrode mounting device is not used, so that the limiting table 131 is attached to the limiting retainer ring 141, and the measuring electrode 12 is protected from being stained by the outside.

In order to improve the accuracy and speed of the measuring electrode 12 during operation, not less than 5 measuring electrodes can be sleeved in the protective head 13. The larger the number of the measuring electrodes 12, the higher the accuracy of the measurement and the faster the speed of searching for the acupuncture points, which also results in the larger the volume of the head protector 13. In the invention, 5 measuring electrodes 12 are sleeved on the head guard 13, wherein 4 measuring electrodes 12 are arranged in the measuring

electrode mounting holes

132, and 1 measuring electrode 12 is arranged in the center of the central electrode 11. When the invention works, the impedance of 5 measuring points in the 4 areas of the measured surface skin can be monitored simultaneously.

The pen holder 2 comprises a shaft 21, a connector 22, an electrode switch 23, a battery 24 and a single board computer 25. The shaft 21 is adapted to receive the connector 22, the pole switch 23, the battery 24 and the single board computer 25. The connector 22 is used for connecting an internal circuit of the shaft 21. The battery 24 is a power unit of the present invention, and an ac/dc conversion module is disposed inside the battery 24 to provide ac and/or dc power for the electronic components in the present invention. The single board computer 25 includes a microprocessor unit, a data storage unit, an I/O interface, a constant current power supply module, an interrupt controller, an analog/digital converter, a modem, and the like.

Preferably, the piezoelectric crystal 18 is connected to a control circuit on the single board computer 25 for controlling an internal measurement circuit to measure the impedance of the skin 4 under test. The measuring electrode 121 can push the electrode spring 17 to compress, the electrode spring 17 presses the piezoelectric crystal 18 to generate an electric signal, and when the electric signal generated by the pressure of the electrode spring 17 reaches a preset value of a control circuit on the single board computer 25, a condition for starting a measuring loop is met. The electrode switch 23 is a primary physical switch of all the measuring electrodes 12, and can lead out the static electricity of the user through the ground wire of the physiotherapy circuit connected to the pen tail 3, when the user uses the pen, the electrode switch 23 is pressed first, and when the electric signal generated by the piezoelectric crystal 18 pressed by the electrode spring 17 reaches the preset value of the control circuit on the single board computer 25, the measuring circuit can be started.

The pen tail 3 is connected with the rod body 21, and the pen head 1, the pen holder 2 and the pen tail 3 are sequentially connected to form a pen body.

Referring to fig. 2, when the head guard 13 contacts the measured epidermis 4, the head guard 13 is forced to compress the head guard spring 16, the measuring electrode 12 sleeved in the head guard 13 is exposed, the measuring electrode 12 contacts the measured epidermis 4, the user continues to apply pressure to the measured epidermis 4, the measuring electrode 12 presses the electrode spring 17, and the electrode spring 17 presses the piezoelectric crystal 18 to generate an electric signal. A single board 25 is bonded within the shaft 21 and is also provided with a display 251, the display 251 being adhered to the viewing port 213. The electrode switch 23 is mounted in the electrode switch mounting hole 214, and the battery 24 is mounted in a battery compartment in the shaft 21. The pen tail 3 is screwed on the rod body 21, and the pen tail 3 is also provided with an external interface 31 and an internal interface 32. The external interface 31 is used for connecting a physiotherapy instrument, and at least 5 jacks are connected to the external interface 31; the internal interface 32 is used for switching the electric energy and the electric signals transmitted from the physiotherapy instrument and providing the electric energy and the electric signals for the measuring circuit and the pulse circuit in the rod body 21.

Referring to fig. 3, the central electrode 11 includes a pulse electrode 111 and a middle measuring electrode 12, the pulse electrode 111 and the measuring electrode 12 are insulated from each other, the measuring electrode 12 is used for measuring the impedance of the measured epidermis 4, and the pulse electrode 111 is used for transmitting the pulse signal of the physiotherapy instrument. The measuring electrode 12 is further provided with a measuring electrode contact 121, and the center electrode 11 is further connected with a pin for transmitting a signal.

Referring to fig. 4, the measuring electrode contact 121 is provided with an excitation electrode 122 and a receiving electrode 123. As shown in fig. 4, the excitation electrode 122 is disposed at the center of the measurement electrode contact 121, the central electrode 111 is sequentially and annularly disposed from the center to the periphery with the excitation electrode 122, the receiving electrode 123 and the pulse electrode 111, and the excitation electrode 122, the receiving electrode 123 and the pulse electrode 111 are insulated from each other.

Referring to fig. 5, the tip cap 15 is used to enclose the sheath 14, and provide protection for the central electrode 11 and the measuring electrode 12 with the sheath 14 and the tip 13. The nib cover 15 is also provided with a female snap 152. A pin for transmitting a signal is connected to the cap 15.

Referring to fig. 6, a male snap 211 matched with the female snap 152 is arranged on the shaft 21, the male snap 211 and the female snap 152 are in interference fit, and after assembly, the shaft 21 and the nib 1 can be tightly combined. The shaft 21 is also provided with connector fixing holes 212 for mounting the connectors 22, and the connector fixing holes 212 are uniformly arranged on the circumference of the shaft 21. The shaft 21 is further provided with a viewing port 213 for mounting the display 251, and the user can view the display 251 through the viewing port 213. The shaft 21 is also provided with an electrode switch mounting hole 214 for mounting the electrode switch 23.

Referring to fig. 7, the connector 22 is provided with a connector mounting hole 221, and the connector mounting hole 221 is engaged with the connector fixing hole 212. The connector 22 is also connected with pins and jacks for transmitting signals.

Referring to fig. 8, the single board computer 25 is provided with a display 251, and an analog/digital converter on the single board computer 25 converts the impedance electrical signal of the skin 4 to be measured collected from the measuring electrode 12 into an impedance digital signal, and displays the impedance digital signal on the display 251.

Preferably, the display 251 is provided with four elliptical display areas with an upper arrow, a lower arrow, a left arrow, a right arrow and a center, the electric signals measured by the measuring electrodes 12 are converted by an analog-to-digital converter and then are connected to the corresponding display areas, and each measuring electrode 12 corresponds to the display area in the upper, the lower, the left and the right; the measurement data of the measurement electrode 12 in the central electrode 11 is connected to the oval display area in the center of the display 251, and the measurement data of 4 measurement electrodes 12 uniformly distributed on the head guard 13 correspond to four arrow display areas, up, down, left, and right, respectively.

Preferably, the display area of the display 251 is connected with led backlight, and when one measuring electrode 12 collects the impedance signal of the measured epidermis 4, the led backlight of the corresponding display area is lighted, so that the user can observe the measured impedance data.

Further, led backlight of the display area of the display 251 may flash a reminder. When the invention detects 5 groups of measurement data transmitted by all the measurement electrodes 12, the micro-processing unit on the single board computer 25 compares the 5 groups of data, and according to the research of the theory of traditional Chinese medicine, the impedance at the acupuncture point is lower than the impedance around the acupuncture point, so the invention sets the led backlight of the minimum group of display area in the 5 groups of data to flash for reminding.

Referring to fig. 9, a schematic diagram of the operation of the impedance measurement circuit of the present invention is shown. The invention adopts the current excitation voltage measurement technology and adopts a double-electrode method to measure impedance. In fig. 9, I represents a constant current power supply module with an ammeter for measuring a real-time current, I is integrated on the single board computer 25, the constant current power supply module I, a current limiting resistor R, the excitation electrode 122 and the receiving electrode 123 form a complete measuring circuit, and V is used for measuring a voltage between the excitation electrode 122 and the receiving electrode 123. The impedance of the measurement point can be calculated from ohm's law R ═ U/I. In order to ensure that the user is not pricked by overlarge current at the surface skin 4 to be measured in the measuring process, the output current of the constant current power supply module is constant at 160 muA.

When the impedance is measured by using the double-electrode method, the contact tightness degree between the measured surface skin 4 and the measuring electrode 12 can cause different contact resistances, and the measurement precision of the acupuncture point impedance is directly influenced. The measuring electrode 12, the electrode spring 17 and the piezoelectric crystal 18 are formed, that is, the piezoelectric crystal 18 must bear certain elastic force of the electrode spring 17 to open the measuring loop. Therefore, the contact resistance of each measured surface skin 4 is basically consistent, and the measurement accuracy of the impedance of the acupuncture points can be improved.

Referring to fig. 10, a user working with the present invention holds the present invention in a hand-held position as shown in fig. 10. The user's middle finger needs to touch the electrode switch 23 to touch the protective head 13 to the measured surface skin 4, the user applies pressure in the direction of the figure F, and under the action of the pressure, the protective head 13 compresses the protective head spring 16 to expose the central electrode 11 and the measuring electrode 1 inside the protective head 13. The user continues to increase the pressure F, the measuring electrode contact 121 on the measuring electrode 12 contacts the measured epidermis 4, the measuring electrode 12 pushes the electrode spring 17 to press the piezoelectric crystal 18, when the pressure F reaches a preset pressure, an electric signal generated by the piezoelectric crystal 18 is transmitted to a control circuit on the single board computer 25 to close a measuring loop, so that impedance data of 5 surrounding points are measured, the impedance data are processed by the single board computer 25 and displayed at corresponding positions on the display 251, and the battery 24 provides electric energy for the measuring loop.

When the minimum value in the measured 5 groups of data is displayed in the display areas of the four arrows, namely the upper arrow, the lower arrow, the left arrow and the right arrow, the user can combine led backlight flicker to remind that the invention is moved to the prompting direction; the user then translates the present invention an appropriate distance in the direction indicated by the display 251, again measures the impedance data of the skin epidermis, and moves accordingly according to the prompts of the display 251 of the present invention.

When the minimum value among the measured 5 sets of data is displayed in the oval display area at the center of the display 251, it is approximated to the position of the selected acupuncture point here. So far, according to the theory of traditional Chinese medicine, the impedance at the acupuncture point is lower than the impedance around the acupuncture point, and the detection of the acupuncture point position is finished.

According to the acupuncture point position of above-mentioned detection, can connect the external interface 31 and the physiotherapy equipment of tail 3, select suitable physiotherapy parameter through physiotherapy equipment, through pulse electrode 111 on the central electrode 11 carries out the physiotherapy to the affected part.

In summary, the invention measures and processes the impedance of the measured epidermis by the multi-point impedance measurement circuit composed of the measurement electrode, the electrode switch and the single board computer, compares and displays the impedance measurement result, and instructs the user to search the position of the acupuncture point according to the prompt of the display, so that the user can quickly find the acupuncture point needing physical therapy according to the prompt, and can carry out physical therapy by the pulse electrode of the invention. The invention can reduce the difficulty of searching acupuncture points for a user, improve the accuracy of point diagnosis, enhance the physical therapy effect on the affected part and provide parameterized diagnosis results for the user.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A medical intermediate frequency electrode pen is characterized by comprising a pen point, a pen holder and a pen tail, wherein the pen point and the pen holder are buckled in an interference mode, the pen tail is screwed to the end portion of the pen holder, and the pen point, the pen holder and the pen tail are sequentially connected;

the pen point comprises a central electrode, a measuring electrode, a protective head, a sheath and a pen point cover; one end of the sheath is movably sleeved with the protective head, the other end of the sheath is fixedly connected with the pen head cover, the central electrode is movably sleeved on the axis of the protective head, measuring electrodes which are movably sleeved on the protective head are uniformly distributed on the periphery of the central electrode, and a measuring electrode contact at the front end of each measuring electrode is provided with an excitation electrode and a receiving electrode;

the pen holder comprises a holder body, a plug connector, an electrode switch and a single board computer; the rod body contains an electrode switch and a single board computer which is used for receiving electric signals of impedance measurement, converting the electric signals into digital signals and comparing and processing a plurality of groups of digital signals; the excitation electrode, the receiving electrode, the electrode switch and the single board computer are sequentially connected in series through a lead to form a measurement loop; the electrode switch comprises a rod body and a single-board computer, wherein the rod body is provided with a pen point, the single-board computer is fixedly connected with the rod body, and the rod body is provided with an electrode switch mounting hole for mounting the electrode switch.

2. The medical intermediate frequency electrode pen according to claim 1, wherein the central electrode is provided with a measuring electrode contact and a pulse electrode, and the pulse electrode and the physiotherapy instrument constitute a physiotherapy loop.

3. The medical medium frequency electrode pen according to claim 1, wherein the number of the measuring electrode contacts is not less than 5.

4. The medical medium-frequency electrode pen as claimed in claim 1, wherein the pen head further comprises a head-protecting spring, and the head-protecting spring, the head-protecting spring and the sheath form a protective sleeve for the central electrode and the measuring electrode.

5. The medical intermediate frequency electrode pen according to claim 1, wherein the pen head further comprises an electrode spring and a piezoelectric crystal for controlling the measurement circuit to open and close.

6. The medical intermediate frequency electrode pen according to claim 1, wherein the constant current output by the measuring circuit is 160 μ Α.

7. The medical intermediate frequency electrode pen as claimed in claim 1, wherein the single board computer is provided with a display for displaying digital signals.

8. The medical medium-frequency electrode pen as claimed in claim 7, wherein the display is provided with four arrow display areas, an upper arrow display area, a lower arrow display area, a left arrow display area, a right arrow display area and a central oval display area.

9. The medical medium frequency electrode pen according to claim 8, wherein the display area of the display is provided with an LED backlight.

10. The medical intermediate frequency electrode pen as claimed in claim 1, wherein the pen tail is provided with an external interface for connecting a physiotherapy instrument.