Electrotherapy device

Abstract

An electrotherapy device comprises a driving module, a conversion module, at least three output modules and a control module. The driving module is used for outputting a direct current driving signal. The conversion module comprises two input ends, at least three switch arms and at least three output ends, the two input ends are electrically connected with the driving module, the switch arms are connected between the two input ends, and each switch arm comprises an upper arm switch element and a lower arm switch element; and each output end is electrically connected with each switch arm. The at least three output modules are electrically connected with the at least three output ends respectively, and each output module comprises an electrode. The control module controls the plurality of switch arms, so that the conversion module converts the direct current driving signal into a stimulation signal with positive and negative potential changes, and the stimulation signal is output to an organism from the electrodes of two of the at least three output modules in turn.

Description

Technical Field

[0001] The present invention relates to an electrotherapy device; in particular, to an electrotherapy device with multiple channels. Background Art

[0002] Electrotherapy is a common treatment method in physical therapy. A stimulation signal is generated by an electrotherapy device, and then the stimulation signal is applied to the skin of a living organism through two electrodes of the electrotherapy device. The stimulation signal is then transmitted into the body to stimulate muscle contraction and blood vessel dilation, thereby relieving muscle soreness and promoting blood circulation in the body, while achieving therapeutic effects such as dredging meridians.

[0003] Conventional electrotherapy devices typically have only one electrotherapy channel, meaning they have two electrodes. Therefore, they can only treat one part of a body. To address two parts of a body, some have developed devices with dual electrotherapy channels. These devices require a separate driver module for each channel, generating two DC drive signals for each channel. The addition of two driver modules increases circuit costs. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide an electrotherapy device that can reduce the circuit cost of configuring a driving module.

[0005] To achieve the above objectives, the present invention provides an electrotherapy device for connecting to a power source and a living organism; the electrotherapy device includes a driving module, a conversion module, at least three output modules and a control module.

[0006] The driving module is electrically connected to the power source and has two DC output terminals. The driving module converts the power of the power source into a DC driving signal and outputs the DC driving signal from the two DC output terminals.

[0007] The conversion module includes two input terminals, at least three switch arms and at least three output terminals. The multiple switch arms are connected in parallel between the two input terminals. Each switch arm includes an upper arm switch element and a lower arm switch element connected in series. The upper arm switch element and the lower arm switch element can be controlled to be turned on or off respectively; each output terminal is electrically connected to the connection point of the upper arm switch element and the lower arm switch element of each switch arm.

[0008] The at least three output modules are electrically connected to the at least three output ends respectively. The at least three output modules respectively include an electrode, and the electrode is used to contact the biological body.

[0009] The control module electrically connects the upper arm switch element and the lower arm switch element of each switch arm, and outputs multiple switching signals to the multiple upper arm switch elements and the multiple lower arm switch elements of the multiple switch arms, so that the conversion module converts the DC drive signal into a stimulation signal with positive and negative potential changes and outputs it to the biological body in turn from the electrodes of two of the at least three output modules.

[0010] The effect of the present invention is that only one driving module is needed to generate a DC driving signal to provide two electrotherapy channels for use, and there is no need to set up a driving module for each electrotherapy channel, thereby achieving the purpose of reducing circuit costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 1 is a schematic diagram of the structure of an electrotherapy device according to a first preferred embodiment of the present invention.

[0012] Figure 2 Schematic diagram of a conversion module and a control module according to a first preferred embodiment of the present invention.

[0013] Figure 3 Schematic diagram of an output module according to a first preferred embodiment of the present invention.

[0014] Figure 4 Schematic diagram of the timing sequence of stimulation signals and switching signals according to the first preferred embodiment of the present invention.

[0015] Figure 5 FIG. 1 is a schematic diagram of the timing sequence of stimulation signals and switching signals according to a second preferred embodiment of the present invention.

[0016] Figure 6 FIG. 1 is a schematic diagram of a conversion module and a control module according to a third preferred embodiment of the present invention.

[0017] Figure 7 Schematic diagram of the timing sequence of stimulation signals and switching signals according to the third preferred embodiment of the present invention.

[0018] Figure 8 FIG. 1 is a schematic diagram of the structure of an electrotherapy device according to a fourth preferred embodiment of the present invention.

[0019] Figure 9 Schematic diagram of an output module according to a fourth preferred embodiment of the present invention.

[0020] Figure 10 FIG. 1 is a schematic diagram of an output module according to a fifth preferred embodiment of the present invention.

[0021] Figure 11 FIG. 1 is a schematic diagram of the structure of an electrotherapy device according to a sixth preferred embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1, 4, 6: Electrotherapy device

[0024] 10: Driver module

[0025] 12: DC output port

[0026] 122: DC output terminal

[0027] 124: DC output terminal

[0028] 14: Conversion module

[0029] 16: Input port

[0030] 162: Input

[0031] 164: Input

[0032] 18: Switch arm

[0033] 182: First switch arm

[0034] 184: Second switch arm

[0035] 186: Third switch arm

[0036] 188: Fourth switch arm

[0037] 20: Upper arm switch element

[0038] 22: Lower arm switch element

[0039] 24: Output port

[0040] 242: Output

[0041] 244: Output

[0042] 246: Output

[0043] 248: Output

[0044] 26: Output module

[0045] 28: Ontology

[0046] 282: Application side

[0047] 282a: Surface

[0048] 30: Electrode

[0049] 302: Conductive layer

[0050] 304: Conductive adhesive layer

[0051] 32: Control module

[0052] 34: Conversion module

[0053] 36: Output module

[0054] 38: Light-emitting unit

[0055] 382: First diode

[0056] 384: Second diode

[0057] 40: Electrode

[0058] 402: Conductive layer

[0059] 404: Conductive adhesive layer

[0060] 42: light-transmitting part

[0061] 44: Output module

[0062] 46: Ontology

[0063] 48: Surface

[0064] 482: light-transmitting part

[0065] 50: Electrode

[0066] 52: Light-emitting unit

[0067] 54: Output module

[0068] 56: Light-emitting unit

[0069] 562: First diode

[0070] 564: Second diode

[0071] 100: Power

[0072] 200: Organisms

[0073] a, b, c, d: nodes

[0074] S1~S8: switching signal

[0075] T: cycle time DETAILED DESCRIPTION

[0076] In order to explain the present invention more clearly, preferred embodiments are given and described in detail with reference to the accompanying drawings. Figures 1 to 3 FIG. 1 illustrates an electrotherapy device 1 according to a first preferred embodiment of the present invention. The device 1 is connected to a power source 100 and a living organism 200. The power source 100 may be a DC power source, and the living organism 200 may be, for example, a human body. The device 1 includes a driver module 10, a converter module 14, at least three output modules 26, and a control module 32.

[0077] The driver module 10 is electrically connected to the power supply 100 and has a DC output port 12. The DC output port 12 has two DC output terminals 122 and 124. The driver module 10 converts the power from the power supply 100 into a DC driving signal and outputs the DC driving signal from the two DC output terminals 122 and 124 of the DC output port 12. One of the two DC output terminals 122 and 124 is a positive terminal, and the other is a negative terminal. The driving signal can be a current or voltage signal. In this embodiment, it is a current signal. The circuit of the driver module 10 can be referred to in Patent No. TWI643646 "Cutaneous Nerve Stimulator Set" and will not be described in detail here.

[0078] The conversion module 14 includes an input port 16, at least three switching arms 18, and an output port 24. The input port 16 has two input terminals 162 and 164, respectively electrically connected to the two DC output terminals 122 and 124 of the driver module 10 and receiving the driving signal. The multiple switching arms 18 are connected in parallel between the two input terminals 162 and 164 of the input port 16. Each switching arm 18 includes an upper switching element 20 and a lower switching element 22 connected in series. The upper switching element 20 and the lower switching element 22 can be controlled to be turned on or off. The output terminals 242, 244, and 246 of the output port 24 are electrically connected to the connection points (i.e., nodes a, b, and c) of the upper switching element 20 and the lower switching element 22 of each switching arm 18. The three switch arms 18 include a first switch arm 182 , a second switch arm 184 , and a third switch arm 186 . Three nodes a, b, and c are located on the first switch arm 182 , the second switch arm 184 , and the third switch arm 186 , respectively.

[0079] In this embodiment, each of the upper-arm switching elements 20 and each of the lower-arm switching elements 22 is, for example, a bipolar junction transistor (BJT), but is not limited thereto and may also be a metal oxide semiconductor field effect transistor (MOSFET). A first terminal (collector) of each of the upper-arm switching elements 20 is electrically connected to one of the input terminals 162 and one of the DC output terminals 122; a second terminal (emitter) of each of the upper-arm switching elements 20 is electrically connected to a first terminal (collector) of each of the lower-arm switching elements 22, and a second terminal (emitter) of each of the lower-arm switching elements 22 is electrically connected to the other input terminal 164 and the other DC output terminal 124; a third terminal (base) of each of the upper-arm switching elements 20 and a third terminal (base) of each of the upper-arm switching elements 20 are electrically connected to the control module 32 and are controlled by the control module 32 to be turned on or off. The output port 24 has at least three output ends 242, 244, and 246. Each of the output ends 242, 244, and 246 of the output port 24 is electrically connected to the second end of each of the upper arm switching elements 20 and the first end of each of the lower arm switching elements 22. That is, each of the output ends 242, 244, and 246 is electrically connected to each of the nodes a, b, and c.

[0080] The three output modules 26 are electrically connected to the three output terminals 242, 244, and 246, respectively. Each of the three output modules 26 includes an electrode 30 for contacting the biological subject. In this embodiment, each output module 26 is implemented as an electrotherapy patch and further includes a body 28. Each body 28 has an application side 282, each having a surface 282a. Each electrode 30 is disposed on the body 28 and protrudes from the application side 282. Each electrode 30 includes, from top to bottom, a conductive layer 302 and a conductive adhesive layer 304. Each conductive layer 302 is bonded to the surface 282a of the application side 282 of each body 28, and each conductive adhesive layer 304 is bonded to each conductive layer 302. The area of ​​each conductive adhesive layer 304 is not less than the area of ​​each conductive layer 302, so that each output module 26 adheres to the skin of the biological subject 200 and does not fall off easily. Each conductive layer 302 is electrically connected to each output terminal 242, 244, 246 of the conversion module 14. The material of each conductive layer 302 can be a metal layer, a conductive composite material containing metal or carbon, etc.

[0081] The control module 32 electrically connects the upper arm switch element 20 and the lower arm switch element 22 of each of the switch arms 18. The control module 32 outputs multiple switching signals S1 to S4 to the multiple upper arm switch elements 20 and the multiple lower arm switch elements 22 of the multiple switch arms 18, so that the conversion module 14 converts the DC drive signal into a stimulation signal with positive and negative potential changes and outputs it to the biological body 200 in turn from the electrodes 30 of two of the three output modules 26.

[0082] In this embodiment, the control module 32 may include a microcontroller to output the plurality of switching signals S1 to S4. Figure 2 and Figure 4 The control module 32 outputs the plurality of switching signals S1-S4 to the plurality of upper-arm switching elements 20 and the plurality of lower-arm switching elements 22 of the plurality of switch arms 18 within a cycle time T, so that the stimulation signal is alternately output from the electrodes 30 of two of the three output modules 26 to the biological subject 200 within the cycle time. The cycle time is between 0.5 and 1 second, for example, a cycle time of 0.7874 seconds. Therefore, within each cycle time T, the stimulation signal may include a positive potential pulse and a negative potential pulse, with the width of each pulse being 0.0937 seconds, for example.

[0083] More specifically, when the switching signals S1-S4 output by the control module 32 to the third end of the corresponding upper arm switching element 20 or the third end of the lower arm switching element 22 are at a high level, the corresponding upper arm switching element 20 or the lower arm switching element 22 is turned on; conversely, when the switching signals S1-S4 are at a low level, the corresponding upper arm switching element 20 or the lower arm switching element 22 is turned off.

[0084] Please cooperate Figure 2 and Figure 4, illustrating the switching signals S1 to S4 that control the multiple switch arms 18 in each cycle time T. The switching signals S1 and S4 output by the control module 32 in a positive half cycle of the cycle time T are at a high level, and the other switching signals S2, S3, S5, and S6 are at a low level. The upper arm switch element 20 of the first switch arm 182 and the lower arm switch element 22 of the second switch arm 184 are turned on, and the other upper arm switch elements 20 and lower arm switch elements 22 are turned off. At this time, the stimulation signal output from the nodes a and b to the corresponding two electrodes 30 is a positive potential, and the stimulation signal has a positive potential pulse. That is, the stimulation signal is a pulse with a positive potential output from the first switch arm 182 and the second switch arm 184 in the positive half cycle of the cycle time T. Then, the switching signals S3 and S6 output by the control module 32 in the positive half cycle of the cycle time T are at a high level, and the other switching signals S1, S2, S4, and S5 are at a low level. The upper arm switch element 20 of the second switch arm 184 and the lower arm switch element 22 of the third switch arm 186 are turned on, and the other upper arm switch elements 20 and lower arm switch elements 22 are turned off. At this time, the stimulation signal output from the nodes b and c to the corresponding two electrodes 30 is a positive potential, and the stimulation signal has a positive potential pulse, that is, it is the turn of the second switch arm 184 and the third switch arm 186 to output a positive potential pulse.

[0085] Similarly, the switching signals S1~S4 output by the control module 32 in a negative half cycle of the cycle time control the lower arm switch element 22 of the first switch arm 182 and the upper arm switch element 20 of the second switch arm 184 to be turned on, and the other upper arm switch elements 20 and the lower arm switch elements 22 are turned off. At this time, the stimulation signal output from nodes a and b to the corresponding two electrodes 30 is a negative potential, and the stimulation signal has a pulse with a negative potential, that is, the stimulation signal in the negative half cycle of the cycle time T is a pulse with a negative potential output from the first switch arm 182 and the second switch arm 184. Then, the switching signals S1~S4 output by the control module 32 in the negative half cycle of the cycle time T control the lower arm switch element 22 of the second switch arm 184 and the upper arm switch element 20 of the third switch arm 186 to be turned on, and the other upper arm switch elements 20 and the lower arm switch elements 22 are turned off. At this time, the stimulation signal output from nodes b and c to the corresponding two electrodes 30 is a negative potential, and the stimulation signal has a pulse with a negative potential, that is, it is the turn of the second switch arm 184 and the third switch arm 186 to output a pulse with a negative potential.

[0086] In addition, Figure 4 In the embodiment, when the plurality of switching signals S1 - S4 are all at low level, the stimulation signal is at zero level.

[0087] The multiple electrodes 30 transmit the stimulation signal to the biological body 200. Two different parts of the biological body 200, like two resistors, form two conductive paths. The three electrodes 30 form two electrotherapy channels. For example, if three electrodes 30 contact three acupuncture points, electronic acupuncture can be performed on two meridian segments. Alternatively, if three electrodes 30 contact two parts, electrical stimulation can be applied to both parts to relieve pain.

[0088] Therefore, only one driving module 10 is needed to generate a DC driving signal to provide two electrotherapy channels. There is no need to set up a driving module 10 for each electrotherapy channel, thereby achieving the purpose of reducing circuit costs.

[0089] Figure 5 This is a timing diagram of a stimulation signal according to a second preferred embodiment of the present invention. This embodiment generates stimulation signals based on the electrotherapy device 1 according to the first embodiment. The difference is that the switching signals S1-S4 output by the control module 32 during the positive and negative half-cycles not only control the first and second switch arms 182, 184, and the second and third switch arms 184, 186 to output stimulation signals, but also control the first and third switch arms 182, 186 to output stimulation signals. In other words, during the positive half-cycle of the cycle time T, the stimulation signal is generated by the first and second switch arms 182, 184 outputting a pulse forming a positive potential, then outputting a pulse forming a positive potential from the second and third switch arms 184, 186, and finally outputting a pulse forming a positive potential from the first and third switch arms 182, 186. In the negative half cycle of the cycle time T, the stimulation signal outputs a pulse of negative potential from the first switch arm 182 and the second switch arm 184, then outputs a pulse of negative potential from the second switch arm 184 and the third switch arm 186, and then outputs a pulse of negative potential from the first switch arm 182 and the third switch arm 186.

[0090] Therefore, the stimulation signals output from the first switch arm 182 and the third switch arm 186 can perform electrotherapy on two parts of the biological body 200 at the same time.

[0091] Figure 6 The conversion module 34 of the electrotherapy device of the third preferred embodiment of the present invention is based on the first embodiment. The plurality of switch arms 18 further includes a fourth switch arm 188. The connection point (node ​​d) of the upper arm switch element 20 and the lower arm switch element 22 of the fourth switch arm 188 is electrically connected to the output end 248 of the output port 24.

[0092] In addition, different from the first embodiment, in this embodiment, Figure 7As shown, the switching signals S1~S8 output by the control module 32 in the positive half cycle of the cycle time T control the upper arm switch element 20 of the first switch arm 182 and the lower arm switch element 22 of the second switch arm 184 to be turned on, and the other upper arm switch elements 20 and the lower arm switch elements 22 are turned off. At this time, the stimulation signal output from nodes a and b to the corresponding two electrodes 30 is a positive potential, and the stimulation signal has a positive potential pulse, that is, the stimulation signal in the positive half cycle of the cycle time T is a pulse output from the first switch arm 182 and the second switch arm 184 to form a positive potential. Then, the switching signal output by the control module 32 in the positive half cycle of the cycle time T controls the upper arm switch element 20 of the third switch arm 186 and the lower arm switch element 22 of the fourth switch arm 188 to be turned on, and the other upper arm switch elements 20 and lower arm switch elements 22 are turned off. At this time, the stimulation signal output from nodes c and d to the corresponding two electrodes 30 is a positive potential, and the stimulation signal has a positive potential pulse, that is, a positive potential pulse is output from the third switch arm 186 and the fourth switch arm 188.

[0093] Similarly, the switching signals S1 to S8 output by the control module 32 in the negative half cycle of the cycle time T control the lower arm switch element 22 of the first switch arm 182 and the upper arm switch element 20 of the second switch arm 184 to be turned on, and the other upper arm switch elements 20 and the lower arm switch elements 22 to be turned off. At this time, the stimulation signal output from nodes a and b to the corresponding two electrodes 30 is a negative potential, and the stimulation signal has a pulse with a negative potential, that is, the stimulation signal in the negative half cycle of the cycle time T is a pulse with a negative potential output from the first switch arm 182 and the second switch arm 184. Then, the switching signals S1~S8 output by the control module 32 in the negative half cycle of the cycle time T control the lower arm switch element 22 of the third switch arm 186 and the upper arm switch element 20 of the fourth switch arm 188 to be turned on, and the other upper arm switch elements 20 and the lower arm switch elements 22 are turned off. At this time, the stimulation signal output from the nodes c and d to the corresponding two electrodes 30 is a negative potential, and the stimulation signal has a pulse of negative potential, that is, a pulse of negative potential is output from the third switch arm 186 and the fourth switch arm 188.

[0094] Therefore, only one driving module 10 is needed to generate a DC driving signal to provide two electrotherapy channels. In addition, the two parts of the biological body 200 contacted by the two pairs of output modules 26 can be spaced farther apart.

[0095] Figure 8 and Figure 9FIG. 4 shows an electrotherapy device 4 according to a fourth preferred embodiment of the present invention. The device has a structure substantially similar to that of the first embodiment, except that each output module 36 further includes a light-emitting unit 38. Each electrode 40 and each light-emitting unit 38 are disposed on each body 28, with each electrode 40 protruding from the application side 282 of each body 28. Light emitted by each light-emitting unit 38 is directed toward the exterior of the application side 282 of each body 28. Each electrode 40 is electrically connected to each output terminal 242, 244, 246 via each light-emitting unit 38. That is, each light-emitting unit 38 is electrically connected to each output terminal 242, 244, 246, and each electrode 40 is electrically connected to each light-emitting unit 38. In this embodiment, each light-emitting unit 38 includes a first diode 382 and a second diode 384, and at least one of the first diode 382 and the second diode 384 is a light-emitting diode. In this embodiment, the first diode 382 and the second diode 384 are both light-emitting diodes, which may be, for example, infrared diodes, laser diodes, or diodes that emit light of a specific color. The first diode 382 and the second diode 384 each have an anode and a cathode. The anode of the first diode 382 is electrically connected to one of the output terminals 242, 244, 246 and the cathode of the second diode 384. The cathode of the first diode 382 is electrically connected to the electrode 40, and the anode of the second diode 384 is electrically connected to the electrode 40.

[0096] Each electrode 40 has a light-transmitting portion 42 formed between each conductive layer 402 and each conductive adhesive layer 404. In this embodiment, the light-transmitting portion 42 is a light-transmitting hole. In other embodiments, the light-transmitting portion 42 can be made of a light-transmitting material, such as a material that is transparent to infrared rays. Each light-emitting unit 38 is located above the light-transmitting portion 42. Light emitted by each light-emitting unit 38 passes through the light-transmitting portion 42 and illuminates the exterior of the application side 282 of each body 28.

[0097] During use, each of the electrodes 40 contacts the organism 200, and the application side 282 of each of the main bodies 28 faces the organism 200. The stimulation signal is applied to the organism 200 in turn via the two light-emitting units 38 of two of the at least three output modules 36 and the two electrodes 40, and each of the light-emitting units 38 is driven by the stimulation signal to emit light to illuminate the organism 200.

[0098] Since the first diode 382 and the second diode 384 of each of the output modules 36 are connected in reverse, when the stimulation signal is at a positive potential, the first diode 382 of each of the output modules 36 conducts forward and emits light; when the stimulation signal is at a negative potential, the second diode 384 of each of the output modules 36 conducts forward and emits light. That is, when the stimulation signal is at a positive potential or a negative potential, the light-emitting unit 38 of each of the output modules 36 will emit light. The stimulation signal drives the light-emitting unit 38 to illuminate the skin of the organism, thereby activating blood circulation, and at the same time, the stimulation signal is transmitted to the skin through the electrode 40, thereby achieving the effect of simultaneous phototherapy and electrotherapy. It is worth mentioning that, in conjunction with phototherapy, it can also accelerate blood circulation in the body and dredge meridians, so that each of the output modules 36 has the effects of both phototherapy and electrotherapy, and shortens the entire treatment course of phototherapy combined with electrotherapy.

[0099] The output module 36 having the light emitting unit 38 in this embodiment can also be applied to the third embodiment.

[0100] Please refer to Figure 10 In a fifth preferred embodiment of the present invention, the structure is substantially the same as that of the fourth embodiment, except that the body 46 of the output module 44 is rod-shaped. Each electrode 50 is a metal rod extending from the application-side surface 48. One end of the metal rod of the electrode 50 contacts the biological body 200, transmitting the stimulation signal into the body. Each light-emitting unit 52 is disposed around each electrode 50. Each surface 48 has at least one light-transmitting portion 482. In this embodiment, the light-transmitting portion 482 is a light-transmitting hole and is correspondingly disposed below each light-emitting unit 52. Each light-emitting unit 52 transmits light through the light-transmitting portion 482 below, thus achieving the effect of simultaneous phototherapy and electrotherapy. Because each electrode 50 is a metal rod, it can directly contact acupuncture points, achieving the purpose of electronic acupuncture. In other embodiments, the light-transmitting portion 482 can be made of a light-transmitting material, such as a material that is transparent to infrared rays.

[0101] Figure 11 The sixth preferred embodiment of the present invention is illustrated as an electrotherapy device 6. This embodiment has a substantially similar structure to the fourth embodiment, differing in that the second diode 564 of the light-emitting unit 56 of each output module 54 is a non-emitting diode. Therefore, this embodiment of the electrotherapy device 6 not only allows for simultaneous light therapy and electrotherapy, but also, when the stimulation signal is positive or negative, only one of the light-emitting units 56 of the two corresponding output modules 54 illuminates, resulting in the two light-emitting units 56 emitting light in turn, i.e., each light-emitting unit 56 emits light intermittently. In other embodiments, the first diode 562 can be replaced with a non-emitting diode as needed.

[0102] The above description is only a preferred embodiment of the present invention. Any equivalent changes made by applying the description and claims of the present invention should be included in the patent scope of the present invention.

Claims

1. An electrotherapy device for connecting to a power source and a living organism; the electrotherapy device comprising: a driving module electrically connected to the power supply, the driving module having two DC output terminals, the driving module converting the power of the power supply into a DC driving signal and outputting the DC driving signal from the two DC output terminals; A conversion module comprising two input terminals, at least three switching arms, and at least three output terminals, wherein a plurality of the switching arms are connected in parallel between the two input terminals, each of the switching arms comprising an upper switching element and a lower switching element connected in series, the upper switching element and the lower switching element being controllable to be turned on or off respectively; and each of the output terminals being electrically connected to a connection point between the upper switching element and the lower switching element of each switching arm; At least three output modules, electrically connected to the at least three output terminals, respectively, each of the at least three output modules comprising an electrode, the electrode being configured to contact the biological body; as well as A control module electrically connects the upper arm switch element and the lower arm switch element of each of the switch arms, and the control module outputs multiple switching signals to the multiple upper arm switch elements and the multiple lower arm switch elements of the multiple switch arms, so that the conversion module converts the DC drive signal into a stimulation signal with positive and negative potential changes and outputs it to the biological body in turn from the electrodes of two of the at least three output modules.

2. The electrotherapy device as described in claim 1, wherein the control module outputs the multiple switching signals to the multiple upper arm switch elements and the multiple lower arm switch elements of the multiple switch arms within a cycle time, so that the stimulation signal is output to the biological body in turn from the electrodes of two of the at least three output modules within the cycle time.

3. The electrotherapy device of claim 2, wherein the cycle time is between 0.5 and 1 second.

4. The electrotherapy device as described in claim 2, wherein the at least three switch arms of the conversion module include a first switch arm, a second switch arm, and a third switch arm; the stimulation signal, in a positive half cycle of the cycle time, is output from the first switch arm and the second switch arm to form a pulse of positive potential, and then the second switch arm and the third switch arm output a pulse of positive potential; the stimulation signal, in a negative half cycle of the cycle time, is output from the first switch arm and the second switch arm to form a pulse of negative potential, and then the second switch arm and the third switch arm output a pulse of negative potential.

5. The electrotherapy device as described in claim 2, wherein the at least three switch arms of the conversion module include a first switch arm, a second switch arm and a third switch arm; the stimulation signal, in a positive half cycle of the cycle time, is output from the first switch arm and the second switch arm to form a pulse of positive potential, then from the second switch arm and the third switch arm to form a pulse of positive potential, and then from the first switch arm and the third switch arm to form a pulse of positive potential; the stimulation signal, in a negative half cycle of the cycle time, is output from the first switch arm and the second switch arm to form a pulse of negative potential, then from the second switch arm and the third switch arm to form a pulse of negative potential, and then from the first switch arm and the third switch arm to form a pulse of negative potential.

6. The electrotherapy device as described in claim 2, wherein the at least three switch arms of the conversion module include a first switch arm, a second switch arm, a third switch arm and a fourth switch arm; the stimulation signal, in a positive half cycle of the cycle time, is output from the first switch arm and the second switch arm to form a pulse of positive potential, and then output from the third switch arm and the fourth switch arm to form a pulse of positive potential; the stimulation signal, in a negative half cycle of the cycle time, is output from the first switch arm and the second switch arm to form a pulse of negative potential, and then output from the third switch arm and the fourth switch arm to form a pulse of negative potential.

7. The electrotherapy device according to claim 1, wherein each of the output modules further comprises a body and a light-emitting unit, each of the bodies has an application side, each of the electrodes and each of the light-emitting units is arranged on each of the bodies, and each of the electrodes protrudes from the application side of each of the bodies, and the light emitted by each of the light-emitting units is directed toward the outside of the application side of each of the bodies; each of the light-emitting units is electrically connected to each of the output ends, and each of the electrodes is electrically connected to each of the light-emitting units; wherein, When each of the electrodes contacts the organism, each of the application sides faces the organism, and the stimulation signal is applied to the organism in turn via the two light-emitting units and the two electrodes of two of the at least three output modules, and each of the light-emitting units is driven by the stimulation signal to emit light to illuminate the organism.

8. The electrotherapy device of claim 7, wherein each of the light-emitting units comprises a first diode and a second diode, the first diode and the second diode respectively having an anode and a cathode, the anode of the first diode being electrically connected to one of the output terminals and the cathode of the second diode, the cathode of the first diode being electrically connected to the electrode, the anode of the second diode being electrically connected to the electrode, and at least one of the first diode and the second diode being a light-emitting diode.

9. The electrotherapy device of claim 8, wherein the first diode and the second diode are both light emitting diodes.

10. The electrotherapy device as described in claim 7, wherein the application side of each of the bodies has a surface; each of the electrodes includes a conductive layer and a conductive adhesive layer, each of the conductive layers is bonded to the surface of the application side of each of the bodies, and each of the conductive adhesive layers is bonded to each of the conductive layers.

11. The electrotherapy device according to claim 10, wherein each of the electrodes has a light-transmitting portion, each of the light-transmitting portions is formed on each of the conductive layers and each of the conductive adhesive layers, and light emitted by each of the light-emitting units is transmitted through each of the light-transmitting portions.

12. The electrotherapy device as claimed in claim 11, wherein each of the light-transmitting portions is a light-transmitting hole.

13. The electrotherapy device as described in claim 7, wherein the application side of each of the bodies has a surface; each of the electrodes is a metal rod protruding from each of the surfaces to the outside; each of the surfaces has at least one light-transmitting portion, and the light emitted by each of the light-emitting units is transmitted through each of the light-transmitting portions. The electrotherapy device according to claim 13 , wherein the at least one light-transmitting portion is a light-transmitting hole.

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