TWI643646B - Skin nerve stimulating device group - Google Patents

Abstract

A cutaneous nerve stimulator group includes a cutaneous nerve stimulator and a safety patch module. The cutaneous nerve stimulator includes a control circuit, a timing generation circuit, a peak current control converter, and a conversion circuit. The safety patch module includes a patch body, The induction circuit and the load end are attached. The control circuit is used to output a cut-off voltage when a sensing voltage exceeds a control voltage. The timing generation circuit receives the cut-off voltage and a clock signal and generates a lead signal. The peak current control conversion The device is used to output a working current. The conversion circuit is used to receive the working current and convert it into a stimulus signal with positive and negative potential changes. The patch body is for attaching to the human skin. The attaching induction circuit is when the patch body is away from the human skin. Stop outputting stimulus signals. The load end is for outputting stimulus signals to human skin.

Description

Cutaneous nerve stimulator group

The invention relates to a cutaneous nerve nerve stimulator group, in particular a cutaneous nerve nerve stimulator group capable of producing stimulation signals to human skin.

In general physical therapy, electrotherapy is the most widely used. The auxiliary equipment used to relieve pain is generally a transcutaneous electrical nerve stimulation (TENS) device that belongs to the low frequency range. It uses electric current on the skin. Generating pulses to change the brain's perception of pain can be used to reduce pain in arthritis or chronic diseases.

However, in the past, cutaneous nerve nerve stimulators used a high-voltage pulse to output a stimulation current. Generally, a variable resistor was set at the output end of the stimulator, and the resistance of the variable resistor was adjusted by the user to change the output current. However, for different human body impedance factors, the stimulus intensity is not easy to be controlled by the user, and the driving voltage provided by the input source will not be changed by the adjustment of the variable resistor, thus causing the wasting of the driving voltage.

On the other hand, electrotherapy patches are consumables. When the number of uses is increased or improper storage and use, it may cause wear of the patches. The most obvious symptom is that they will fall during use. However, this is very dangerous for the user, because when the patch slides down, the area of contact with the skin changes, which may cause the instability of the stimulation current output; and when the patch is reattached, the user may be exposed to sudden pulses. Feel unwell.

And in the past, in order to feel the obvious effect of electrotherapy, the most common way is to increase the output power of the skin nerve stimulator. However, when the input voltage suddenly appears abnormal or even a surge signal appears, the output power will also be abnormal. The user will feel uncomfortable when using it, and the continuous abnormal output of voltage will easily cause power waste. If a battery is used as a power source, the battery power will be quickly consumed.

Therefore, how to provide a method that can effectively reduce the wastage of driving voltage, and improve the unstable stimulus current directly transmitted to the human body when the electrotherapeutic patch contacts the skin, and how to prevent the user's physical discomfort from the abnormal input voltage, while also How to avoid abnormal power consumption will be the issues and focus of this case.

An object of the present invention is to provide a cutaneous nerve stimulator group capable of effectively reducing the wasting of driving voltage.

Another object of the present invention is to provide a cutaneous nerve stimulator group capable of improving unstable stimulation current output.

The dermal nerve stimulator set of the present invention is for producing a stimulation signal to a human skin, and includes a dermal nerve stimulator and a safety patch module. The dermal nerve stimulator includes a control circuit and a timing generator. Circuit, a peak current control converter and a conversion circuit, the safety patch module includes a patch body, an attached induction circuit and a load end, wherein the control circuit is for receiving a sensing voltage And a control voltage, when the sensing voltage exceeds the control voltage, the control circuit outputs a cut-off voltage, the timing generation circuit is electrically connected to the control circuit and receives the cut-off voltage, and receives For a clock signal, the timing generation circuit generates a conduction signal according to a peak of the cut-off voltage corresponding to a period of the clock signal, and the peak current control converter is electrically connected to the timing generation circuit and the A control circuit for outputting a working current and feedback the sensing voltage to the control circuit, wherein the peak current control converter is based on the A communication number controls the output degree of the working current, and the conversion circuit is electrically connected to the peak current control converter and the control circuit for receiving the working current and converting it into the stimulus having a positive and negative potential change A signal, the patch body has an attaching position for attaching the attaching position to the human skin, and the attaching induction circuit is provided at the attaching position and is electrically connected to the attaching position A conversion circuit that stops outputting the stimulus signal when the patch body is far away from the human skin, the load end portion is disposed at an attachment position of the patch body and is electrically connected to the patch The induction circuit and the conversion circuit, and the load end is for outputting the stimulation signal to the human skin.

The skin nerve stimulator group of the present invention compares the sensing voltage and the control voltage through a control circuit, and controls the working current of the peak current control converter, so that the peak current control converter can generate sufficient work with the lowest transformer power consumption. Current, and use the conversion circuit to form the working current with positive and negative half-cycle output stimulation signals to eliminate the accumulation of charge in the human body, so that the neurocutaneous nerve stimulator can directly adjust the specific electrotherapy frequency required through the conversion circuit, and on the other hand, through the safety patch The module's attachment induction circuit determines whether the patch body is still attached to the human skin. If the patch body is far away from the human skin, it can stop outputting a stimulus signal to prevent an unstable stimulus current from being directly transmitted to the human body. Through the control of the control circuit, the output voltage is kept within a safe range to improve the unstable stimulus current output, while avoiding abnormal power consumption and achieving all the above purposes.

A dermal nerve stimulator set according to an embodiment of the present invention, as shown in FIG. 1, is used to produce a stimulation signal Vrb to a human skin, including a dermal nerve stimulator 1 and a safety patch module 2. In this example, Here, the cutaneous nerve stimulator 1 includes a control circuit 10, a timing generation circuit 20, a peak current control converter 30, and a conversion circuit 40. The control circuit 10 is for receiving a sensing voltage Ve and a control voltage Vref. When the sensing voltage Ve exceeds the control voltage Vref, a cut-off voltage is output by the control circuit 10, and the timing generation circuit 20 is electrically connected to the control circuit 10 for receiving the cut-off voltage output by the timing generation circuit 20 and receiving a clock signal CK, The timing generation circuit 20 can generate a conduction signal Q according to the peak of the cut-off voltage corresponding to the period of the clock signal CK. The peak current control converter 30 is electrically connected to the timing generation circuit 20 and provides an operating current Iout. And feedback the sensing voltage Ve to the control circuit 10, wherein the peak current control converter 30 controls the output level of the working current Iout according to the conduction signal Q, and the conversion circuit is electrically conductively connected. To the peak current control converter 30 and the control circuit 10 for receiving the operating current Iout and converting it into a stimulation signal Vrb with positive and negative potential changes. In addition, the circuit structure of the peak current control converter 30 may also use a flyback converter ( flyback converter). Therefore, the peak current control converter 30 is not limited to that shown in FIG. 1.

The security patch module 2 includes a patch body 50, an attachment induction circuit 60, and a load end 70. The patch body 50 has an attachment position 501, which is used by a user to attach the attachment position 501 to the human body. The skin, the attachment induction circuit 60 is disposed at the attachment position 501 and is electrically connected to the conversion circuit 40. When the patch body 50 is far from the human skin, the output of the stimulation signal Vrb is stopped, and the load end 70 is provided at the attachment Position 501, and is electrically connected to the attachment induction circuit 60 and the conversion circuit 40, and is used to output the stimulation signal Vrb to the human skin. When the load terminal 70 is used to output the stimulation signal to the human skin, a load having an impedance value is formed. Terminal resistance.

Referring to FIG. 2 together, the attachment induction circuit 60 of this example has a primary side of a power input and a secondary side of a power output. The attachment induction circuit 60 includes a first optical coupler 601 and a second optical coupling. A first transistor 611, a first transistor 611, a second transistor 612, and a load-side resistor Rb. The first optical coupler 601 and the second optical coupler 602 are electrically disposed on the primary side of the induction circuit 60. And has an input terminal 601 ₁ , 602 ₁ and an output terminal 601 ₂ , 602 _{2 respectively} . The first transistor 611 and a second transistor 622 are electrically disposed on the secondary side of the induction circuit 60 and each have a a first end _{6111, 6121,} a second end _{6112, 6122,} and a control terminal _{6113, 6123,} wherein the first optical coupler 601 to the input terminal ₆₀₁₁ is electrically conductively connected to the second optical coupler 602 output terminal 602 of the terminal ₂ and the end of the load resistor Rb, the other end of the load end of resistor Rb is electrically conductively connected to the primary side of the electrical loop, the output of the first optical coupler 601 is electrically ₆₀₁₂ guide optical coupler 602 to the first input terminal ₆₀₂₁ and the other end of the primary side of the electrical loop, a first transistor 6 11 and the first terminals 611 ₁ and 612 ₁ of the second electrical body 612 are electrically connected to a predetermined voltage Vcc, and a resistor is further connected between the first terminals 611 ₁ and 612 ₁ and the predetermined voltage Vcc. The transistor 611 and the second terminals 611 ₂ and 612 ₂ of the second transistor 612 are electrically connected to a reference voltage Vss. The control terminal 611 ₃ of the first transistor 611 is light-induced by the first optical coupler 601. The driving terminal is turned on, and the control terminal 612 ₃ of the second transistor 612 is turned on by the light induction driving of the second optical coupler 602. Therefore, when the patch body 50 is dropped away from the human skin, the first transistor 611 and the second transistor 612 will not be turned on by the light induction drive and will be open. At this time, the resistance value can be regarded as infinite (open). And stop outputting the stimulation signal Vrb.

In addition, noise may be generated during the output of the stimulus signal Vrb, which is likely to cause discomfort to the human body. Therefore, in this example, the security patch module 2 may further include a noise filter circuit (Latch) 80, which is electrically connected to The induction circuit 60, the timing generation circuit 20, and the load terminal 70 are attached, and receive the clock signal CK and the stimulation signal Vrb. The noise filtering circuit 80 is for comparing the clock signal CK and the stimulation signal Vrb to filter the noise of the stimulation signal Vrb. In this example, the noise filtering circuit 80 includes a first anti-gate 801 and a second anti-gate 802, and the first anti-gate 801 and the second anti-gate 802 have a first input terminal 801, respectively. _{1, 8021,} a second input terminal _8012, an output _8022, and _{8013, 8023,} a first input of a first NAND gate 801 of the guide 801 _a is electrically connected to the first transistor 611 and between the second end of each of the first electrically _{6111, 6121} and a predetermined voltage Vcc crystal 612, first and second input terminal of NAND 801 ₈₀₁₂ is electrically conductively connected to the second output terminal of NAND 802 _8022, a first input of the second NAND 802 ₈₀₂₁ is electrically conductively connected to the timing generating circuit 20, a second NAND 802 An input terminal ₈₀₂₁ is electrically conductively connected to the output terminal of the first NAND 801 801 _2, the output of the first NAND 801 and the second NAND 802 ends _{8013, 8023} are electrically conductively connected to the The control circuit 10 outputs a stop signal to the control circuit 10 when the noise filtering circuit 80 receives the noise, so that the control circuit 10 suspends power supply. The output waveform after filtering by the noise filtering circuit 80 is shown in FIG. 3.

In order to make the output stimulus signal Vrb have a constant output, in this example, the safety patch module 2 may further include a constant output control circuit 90. The constant output control circuit is electrically connected to the timing generation circuit. 20. Noise filtering circuit 80 and load end 70, constant output control circuit 90 is for comparing the clock signal CK and the stimulation signal Vrb. When the patch body 50 is attached to the human skin, it can be constant through the constant output control circuit 90 The stimulus signal Vrb is output. In this example, the constant output control circuit 90 is a mutex or gate, which has a first input terminal 90 ₁ , a second input terminal 90 ₂ and an output terminal 90 ₃ , and the first input terminal 90 ₁ is electrically connected to the timing generating circuit 20, the second input terminal 90 ₂ is electrically connected to the output terminal 801 _{3 of the} first inverse gate 801, and the output terminal 90 ₃ of the mutually exclusive OR gate is electrically connected To one end of the load end portion 70. When the patch body 50 is attached to human skin, the constant output stimulation signal Vrb output through the constant output control circuit 90 is shown in FIG. 4.

In addition, in this example, the control circuit includes an error amplifier 14, the comparator 12 has a first input terminal 12 ₁ , a second input terminal 12 ₂ and an output terminal 12 ₃ , and the first input terminal 12 of the comparator 12 ₁ is receiving the control voltage Vref. The second input terminal 12 of the comparator 12 ₂ is electrically connected to the peak current control converter 30 and receives the sensing voltage Ve. The comparator 12 is based on the received control voltage Vref and the sensing voltage Ve. The comparison is performed to control the cut-off voltage, and the cut-off voltage is output from the output terminal 12 _{3 of the} comparator 12.

The timing generation circuit 20 described in this example includes a bistable unit 22. The control terminal 22 _S receives the clock signal CK and the input terminal 22 _R receives the cut-off voltage. The output terminal 22 _Q outputs the conduction signal Q. According to the cut-off voltage, change the distribution ratio of the high level and low level of the pilot signal in each cycle, and sum up the above circuits. According to the change of the sensing voltage Ve and the inductor current _IL , the noise filter circuit (Latch) 80 The output voltage waveform is shown in Figure 5.

The peak current control converter 30 in this example includes a sensing resistor R, a driving transistor Qt, a transformer unit 32 and a voltage stabilizing unit 34. A sensing resistor R is electrically connected to the reference voltage Vss. a driving transistor having a first terminal Qt Qt _1, Qt _2, and a control terminal and a second _{terminal. 3} Qt, Qt driving the control terminal of transistor _{Qt. 3} is electrically conductively connected to the bistable unit 22, and based on the received The conduction signal controls the on-time of the driving transistor Qt. The second terminal Qt ₂ of the driving transistor Qt is electrically connected to the other terminal of the sensing resistor R and the second terminal 12 _{2 of the} comparator 12, and is driven by the driving transistor. The second terminal Qt _{2 of} Qt outputs a sensed voltage Ve to the comparator 12, wherein the sensed voltage Ve is a voltage across the sense resistor R when the driving transistor Qt is in an on state. The transformer unit 32 has a primary side 322 and The secondary side 324, the primary test 322 of the transformer unit is electrically connected to the driving voltage Vcc and the first terminal Qt ₁ of the driving transistor Qt. When the driving transistor Qt is in a conducting state, it receives and adjusts the driving voltage and changes it by The secondary side 324 of the transformer unit 32 outputs a modulated driving voltage, 34 is a secondary side 324 electrically connected to the transformer unit 34. The voltage stabilizing unit 34 includes a first diode D1, a second diode D2, and an inductor L. The first diode D1 and the first diode D1 D2 are two diode having an input terminal D1 _1, D2 ₁ and an output terminal D1 _2, D2 _2, an input terminal D1 and the second diode D2, a first diode D1 _1, D2 ₁ is electrically conductive Connected to the secondary side 324 of the transformer unit 34, the output terminal D1 ₂ of the first diode D2 is electrically connected to the output terminal D2 _{2 of the} second diode D2 and the inductor L, and the other end of the inductor L is electrically The input terminal of the second diode D2 is electrically connected to the conversion circuit 40 and the secondary side 324 of the transformer unit 32.

Therefore, the comparator 12 described in this case compares the sensed voltage Ve of the primary side 322 coil of the feedback transformer unit 32 with the control voltage Vref to control the current power output. Therefore, when the output current power increases, the user It can be clearly felt that the electrotherapy penetrates directly into the human body. However, due to the limitation of the control voltage Vref, even if the input voltage suddenly rises, the output voltage can still be maintained within a specific range by the comparator 12, which is safer for the user. It can also prevent the waste of power caused by excessive voltage output. When the user uses the battery as a power source, the battery life can be extended.

Therefore, the control voltage Vref can be reached in a short time. Therefore, as long as the control voltage Vref is adjusted, the boost operation of the driving transistor Qt and the transformer unit 32 can be performed, so that the output operating current Iout of the voltage stabilization unit 34 can meet the load requirements. The current power output of the secondary-side coil 324 of the transformer 32 is effectively controlled to reduce unnecessary current power consumption.

Referring to FIG. 6 together, in this example, the conversion circuit 40 uses a full-bridge converter circuit as an example, and receives a group of modulation signals Vc1 and Vc2 with timing and phase complementation for conduction operation (as shown in FIG. 7). The bridge converter circuit includes a first full-bridge transistor Q1, a second full-bridge transistor Q2, a third full-bridge transistor Q3, and a fourth full-bridge transistor Q4. The transistors Q1 to Q4 have an input terminal Q1 ₁ to Q4 ₁ , an output terminal Q1 ₂ to Q4 _2, and a control terminal Q1 ₃ to Q4 _{3 respectively} . Among them, the first terminal Q1 of the first full-bridge transistor Q1 _{1 1} is electrically connected to the first terminal Q3 _{1 of the} third full-bridge transistor Q3 ₁ and the voltage stabilizing unit 34 to receive the working current Iout, and the second terminal Q1 of the first full-bridge transistor Q1 ₂ is electrically connected To the first end Q2 _{1 of the} second full-bridge transistor Q2 and the load-end resistor Rb, the other end of the load-end resistor Rb is electrically connected to the second end Q3 ₂ and the third end of the third full-bridge transistor Q3. The first terminal Q4 _{1 of the} four full-bridge transistor Q4, the second terminals Q3 ₂ and Q4 ₂ of the second full-bridge transistor Q2 and the fourth full-bridge transistor Q4 are electrically connected to the reference voltage Vss, Full-bridge Each control terminal thereof is Q1 ~ Q4 Q1 ₃ ~ Q4 ₃ is subject to modulation signal Vc1, Vc2 mutual timing phase was turned on.

A cutaneous nerve stimulator set according to another embodiment of the present invention, as shown in FIG. 8. In this example, the transformer unit 52 includes a magnetic flux release coil 526 and a magnetic flux release switch 528, wherein the magnetic flux release coil 526 is electrical Connected to the transformer unit, the magnetic leakage switch 528 is a diode in this example. The output terminal of the magnetic leakage switch 528 is electrically connected to the magnetic leakage switch 526, and the input terminal is electrically connected to the reference voltage Vss. When the driving transistor Qt is in an on state, the magnetic leakage switch 528 is in an off state, and the magnetic leakage coil 526 is maintained in an open circuit state. However, when the driving transistor Qt is in a non-conducting state, the demagnetizing switch 528 is conducting, and the energy of the primary measurement coil 522 of the transformer 52 is discharged through the demagnetizing coil 526. In this way, the magnetic saturation of the transformer 52 can be avoided .

A skin nerve stimulator set according to yet another embodiment of the present invention, as shown in FIGS. 9 and 10, wherein the security patch module 2 further includes a security protection circuit 80 ′, and the security protection circuit 80 ′ includes a sum gate 802. 'and a timer 801' and gate 802 'having a first end _8021', a second end ₈₀₂₂ 'and an output terminal _8023', the timer 801 'includes a signal input terminal _8011', a reset signal input terminal ₈₀₁₂ 'and an output terminal _8013', and gate 802 'of the first end _8021' is for receiving a second clock signal CLK _2, the aND gate 802 'the second end _8022' Is receiving the control voltage Vref, and the output terminal 802 ₃ ′ of the gate 802 ′ is electrically connected to the signal input terminal 801 ₁ ′ of the timer 801 ′, and the reset signal input terminal 801 ₂ ′ of the timer is electrically conductive The first terminals 611 ₁ and 612 ₁ of the first transistor 611 and the second transistor 612 are connected. When the patch body 50 is far from the human skin, the timer 801 ′ detects the time when the patch body 50 is far from the human skin. when away from the skin patch body 50 exceeds a second predetermined interval of the clock signal CLK _2, the output a stop signal to the control circuit 10, control circuit 10 temporarily Power supply signal, wherein the safety protection circuit of the present embodiment 80 'is detected as shown in Fig.

The skin nerve stimulator group of the present invention compares the sensing voltage and the control voltage through a control circuit, and controls the working current of the peak current control converter. In this way, the peak current control converter can use the lowest transformer power consumption. , Can generate enough working current, and then use the conversion circuit to form the working current into positive and negative half-cycle stimulation signals to eliminate the accumulation of human body charge, so that the neurodermal nerve stimulator can directly modulate the specific Electrotherapy frequency. On the other hand, it can be judged whether the patch body is still attached to human skin through the attachment induction circuit of the safety patch module. If it is detected that the patch body is far away from the human skin, it can be stopped immediately. Output the stimulus signal to prevent the unstable stimulus current from being directly transmitted to the human body, increasing safety in use, and the case can also detect the time when the patch body is away from the human skin through a safety protection circuit. When the patch body is away from the human body, When the skin exceeds a predetermined time, a stop signal can be output to the control circuit immediately, so that the control circuit Turn off the power supply to ensure that when the user reattaches the patch, the shock voltage is suddenly received to cause discomfort, and when the user increases the output power, the control circuit can maintain the output voltage within a specific range, which can not only improve the The stable stimulation current output can also avoid abnormal power consumption. When the user uses the battery as a power source, the battery life can be extended and all the above purposes can be achieved.

Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the attached patent application.

Vrb‧‧‧stimulus

1‧‧‧ Dermal nerve stimulator

2‧‧‧ Safety SMD Module

10‧‧‧Control circuit

20‧‧‧ timing generation circuit

30‧‧‧peak current control converter

40‧‧‧ conversion circuit

Ve‧‧‧sensing voltage

Vref‧‧‧Control voltage

CK‧‧‧clock signal

Q‧‧‧ pilot signal

22 _S ‧‧‧Control

50‧‧‧ patch body

60‧‧‧ attached induction circuit

70‧‧‧ load end

501‧‧‧ Attachment position

601‧‧‧First Optocoupler

602‧‧‧Second Optocoupler

611‧‧‧First transistor

612‧‧‧Second transistor

Rb‧‧‧Load-end resistance

_{601 1, 602 1, D1 1} , D2 1, Q1 1 ~ Q4 1, 22 R ‧‧‧ input

601 ₂ , 602 ₂ , 801 ₃ , 802 ₃ , 90 ₃ , 14 ₃ , 12 ₃ , D1 ₂ , D2 ₂ , Q1 ₂ ~ Q4 ₂ , 22 _Q ‧‧‧ output terminal

611 ₁ , 612 ₁ , 802 ₁ '‧‧‧ first end

611 ₂ , 612 ₂ , 802 ₂ '‧‧‧ second end

611 ₃ , 612 ₃ , Qt ₃ , Q1 ₃ ~ Q4 ₃ ‧‧‧ Control terminal

Vcc‧‧‧ predetermined voltage

Vss‧‧‧Reference voltage

80‧‧‧Noise filtering circuit

801‧‧‧The first counter and gate

802‧‧‧Second Reverse Gate

Iout‧‧‧Working current

_{801 1, 802 1, 90 1} , 14 1, 12 1, Qt 1 ‧‧‧ a first input terminal

801 ₂ , 802 ₂ , 90 ₂ , 14 ₂ , 12 ₂ , Qt ₂ ‧‧‧ second input

90‧‧‧constant output control circuit

14‧‧‧ Error Amplifier

12‧‧‧ Comparator

22‧‧‧Bistable Unit

Qt‧‧‧Drive Transistor

I _L ‧‧‧ inductor current

32‧‧‧Transformer unit

34‧‧‧Regulator

R‧‧‧Sense resistor

D1‧‧‧First Diode

D2‧‧‧Second Diode

L‧‧‧Inductance

322, 522‧‧‧‧ side

324‧‧‧ secondary side

Q1‧‧‧The first full-bridge transistor

Q2‧‧‧Second Full Bridge Transistor

Q3‧‧‧The third full-bridge transistor

Q4‧‧‧ Fourth Full-Bridge Transistor

Vc1, Vc2‧‧‧ Modulation signal

526‧‧‧Release coil

528‧‧‧Release switch

80 ’‧‧‧Safety protection circuit

802’‧‧‧ and gate

801’‧‧‧ timer

801 ₃ ', 802 ₃ ' ‧‧‧ output

801 ₁ '‧‧‧ signal input

801 ₂ '‧‧‧ reset signal input

CLK ₂ ‧‧‧Second clock signal

1 is a circuit diagram of a cutaneous nerve stimulator group according to an embodiment of the present invention; FIG. 2 is a circuit diagram of an induction circuit and a noise filtering circuit of the cutaneous nerve stimulator group of FIG. 1; FIG. 3 is a cutaneous nerve stimulator of FIG. 1 Wave pattern of the stimulation signal output of the group; FIG. 4 is a waveform diagram of the constant output of the stimulation signal of the skin nerve stimulator group of FIG. 1; FIG. 5 is a schematic diagram of the output waveform of the cutoff voltage of the skin nerve stimulator group of FIG. Figure 6 is a circuit diagram of the full-bridge converter circuit of the skin nerve stimulator group of Figure 1; Figure 7 is a waveform diagram of the modulation signal of the full-bridge converter circuit of Figure 6; and Figure 8 is another embodiment of the present invention A circuit diagram of a cutaneous nerve stimulator group according to an embodiment, FIG. 9 is a circuit diagram of a cutaneous nerve stimulator group according to still another embodiment of the present invention; FIG. 10 is an induction circuit and a safety protection circuit of the cutaneous nerve stimulator group of FIG. 9 FIG. 11 is a waveform diagram of the signal detection and comparison of the safety protection circuit of FIG. 10.

Claims (10)

A cutaneous nerve stimulator set for producing a stimulus signal to a human skin, including a cutaneous nerve stimulator, including: a control circuit for receiving a sensing voltage and a control voltage, when the sensing voltage exceeds the When controlling the voltage, the control circuit outputs a cut-off voltage; a timing generating circuit is electrically connected to the control circuit and receives the cut-off voltage, and receives a clock signal, and the timing generating circuit responds to the peak value of the cut-off voltage. A period of the clock signal generates a lead signal; a peak current control converter is electrically connected to the timing generating circuit and the control circuit, and outputs a working current, and feedbacks the sensing voltage to the control circuit. The peak current control converter controls the output level of the working current according to the pilot signal; and a conversion circuit is electrically connected to the peak current control converter and the control circuit for receiving the working current and converting it into The stimulus signal with positive and negative potential changes; and a safety patch module, including: a patch body having a patch attachment position Is for the attachment position to be attached to the human skin; an attachment induction circuit is provided at the attachment position and electrically connected to the conversion circuit, and stops outputting when the patch body is far away from the human skin The stimulus signal; a load end portion is disposed at the attachment position of the patch body and is electrically connected to the attachment induction circuit and the conversion circuit, and the load end portion is used to output the stimulus signal to the human skin To form a load-side resistor; wherein the control circuit includes a comparator having a first input terminal, a second input terminal, and an output terminal, and the first input terminal of the comparator receives the control voltage, the comparator The second input terminal is electrically connected to the peak current control converter and receives the sensing voltage. The comparator compares the received control voltage and the sensing voltage to control the cut-off voltage, and is controlled by the comparator. The output terminal of the comparator outputs the cut-off voltage. The attaching induction circuit has a primary side of the power input and a secondary side of the power output. The attaching induction circuit includes a first photocoupler, a Two optical couplers, a first transistor, a second transistor, and the first optical coupler and the second optical coupler are electrically disposed on the primary side of the attached induction circuit and each has an input terminal. And an output terminal, the first transistor and a second transistor system are electrically disposed on the secondary side of the attached induction circuit, and each has a first terminal, a second terminal, and a control terminal, wherein the first terminal The input end of the photocoupler is electrically connected to the output end of the second photocoupler and one end of the load end resistor, and the other end of the load end resistor is electrically connected to the electrical circuit of the primary side. The output end of the first optical coupler is electrically connected to the input end of the second optical coupler and the other end of the primary side electrical circuit, the first transistor and the first end of the second electrical body. The first transistor and the second terminal of the second transistor are electrically connected to a reference voltage, and the control terminal of the first transistor is coupled by the first optical coupling. The light-sensitive driving of the converter is turned on, and the control terminal of the second transistor is received by the light of the second optical coupler. The induction drive is turned on. The cutaneous nerve stimulator set according to item 1 of the scope of patent application, wherein the stimulation signal has at least one noise, and the safety patch module further includes a noise filtering circuit, which is electrically connected to the attachment sensor. The circuit, the timing generating circuit and the load end receive the clock signal and the stimulus signal. The noise filtering circuit compares the clock signal and the stimulus signal to filter the noise of the stimulus signal. The cutaneous nerve stimulator set according to item 2 of the scope of patent application, wherein the noise filtering circuit includes a first anti-gate and a second anti-gate, the first anti-gate and the second anti-gate A first input terminal, a second input terminal, and an output terminal are respectively provided. The first input terminal of the first inverting gate is electrically connected to each of the first transistor and the second transistor. Between the first terminal and the predetermined voltage, the second input terminal of the first anti-gate is electrically connected to the output terminal of the second anti-gate and the first input terminal of the second anti-gate is electrically connected. The second input terminal of the second anti-gate is electrically connected to the output terminal of the first anti-gate and the second anti-gate is electrically connected to the output terminal of the first anti-gate and the second anti-gate. The output end is electrically connected to the control circuit. When the noise filtering circuit receives the noise, it outputs a stop signal to the control circuit, so that the control circuit suspends power supply. The skin nerve stimulator set according to item 3 of the patent application scope, wherein the safety patch module further includes a constant output control circuit, which is electrically connected to the timing generation circuit, the noise filtering circuit, and the load terminal. The constant output control circuit compares the clock signal and the stimulus signal, and when the patch body is attached to the human skin, the stimulus signal is constantly output. The cutaneous nerve stimulator set according to item 4 of the scope of patent application, wherein the constant output control circuit is a mutex or gate having a first input terminal, a second input terminal and an output terminal. A first input terminal of the mutex or gate is electrically connected to the timing generating circuit, a second input terminal of the mutex or gate is electrically connected to an output terminal of the first anti-gate and the mutual The output terminal of the repeller or gate is electrically connected to one end of the load end portion. The cutaneous nerve stimulator set according to item 1 of the patent application scope, wherein the safety patch module further includes a safety protection circuit, the safety protection circuit includes a sum gate and a timer, and the sum gate has a first end A second terminal and an output terminal, the timer includes a signal input terminal, a reset signal input terminal and an output terminal, the first terminal of the AND gate is for receiving a second clock signal, and the gate The second terminal of the timer is electrically connected to the control voltage, the output terminal of the gate is electrically connected to the signal input terminal of the timer, and the reset signal input terminal of the timer is electrically connected to the first A timer and each first end of the second transistor, when the patch body is far from the human skin, the timer detects the time when the patch body is far from the human skin, and when the patch body is far from the human skin When the human skin exceeds a predetermined interval of the second clock signal, a stop signal is output to the control circuit, so that the control circuit suspends power supply. The cutaneous nerve stimulator set according to item 1 of the scope of patent application, wherein the timing generating circuit includes a bistable unit, which receives the clock signal and the cutoff voltage, and changes the height of the conduction signal according to the cutoff voltage. The distribution ratio of level and low level in each cycle. The cutaneous nerve stimulator set according to item 7 of the patent application scope, wherein the peak current control converter includes a sensing resistor electrically connected to the reference voltage; a driving transistor having a first terminal, A second terminal and a control terminal. The control terminal of the driving transistor is electrically connected to the bistable unit and controls the conduction time of the driving transistor according to the received conduction signal. The two terminals are electrically connected to the other terminal of the sensing resistor and the second terminal of the comparator, and the second terminal of the driving transistor outputs the sensing voltage to the comparator, wherein the sensing voltage is When the driving transistor is in a conducting state, the voltage across the sensing resistor is generated; a transformer unit has a primary side and a secondary side, and a primary measurement system of the transformer unit is electrically connected to a driving voltage and the driving current. The first end of the crystal, when the driving transistor is in a conducting state, receives and modifies the driving voltage and outputs the modulated driving voltage from the secondary side of the transformer unit; a voltage stabilizing unit, which is electrically conductive Connect to this transformer sheet The secondary side of the element, the voltage stabilizing unit includes a first diode, a second diode, and an inductor, wherein the first diode and the second diode have an input terminal and an output, respectively. Terminal, the first diode and the input terminal of the second diode are electrically connected to the secondary side of the transformer unit, and the output terminal of the first diode is electrically connected to the second The output end of the diode and the inductor, the other end of the inductor is electrically connected to the conversion circuit, and the input end of the second diode is electrically connected to the conversion circuit and the secondary of the transformer unit. side. The skin nerve stimulator set according to item 8 of the scope of the patent application, wherein the conversion circuit is a full-bridge commutation circuit and receives a group of modulation signals with timing and phase complementation to conduct the operation. The full-bridge commutation The circuit includes a first full-bridge transistor, a second full-bridge transistor, a third full-bridge transistor, and a fourth full-bridge transistor. The full-bridge transistors each have an input terminal, An output terminal and a control terminal, wherein the first terminal of the first full-bridge transistor is electrically connected to the first terminal of the third full-bridge transistor and the voltage stabilizing unit to receive the working current; The second end of the first full-bridge transistor is electrically connected to the first end of the second full-bridge transistor and the load resistance, and the other end of the load resistance is electrically connected to the first The second end of the three full-bridge transistor and the first end of the fourth full-bridge transistor, and the second end of the second full-bridge transistor and the fourth full-bridge transistor are electrically connected to With reference to the voltage, the control terminals of the full-bridge transistors are connected to each other in sequence and phase by the modulation signal. The skin nerve stimulator set according to item 8 of the scope of patent application, wherein the transformer unit includes a magnetic leakage coil, which is electrically connected to the transformer unit and a magnetic leakage switch, and one end of the magnetic leakage switch is electrically connected. To the leakage switch, the other end is electrically connected to the reference voltage. When the driving transistor is in a non-conducting state, the leakage switch is turned on for the voltage release of the transformer unit.