CN209347925U - Nerve stimulator - Google Patents
Nerve stimulator Download PDFInfo
- Publication number
- CN209347925U CN209347925U CN201821406392.1U CN201821406392U CN209347925U CN 209347925 U CN209347925 U CN 209347925U CN 201821406392 U CN201821406392 U CN 201821406392U CN 209347925 U CN209347925 U CN 209347925U
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- reference voltage
- stimulus
- capacitor
- nerve stimulator
- voltage
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- 210000005036 nerve Anatomy 0.000 title claims abstract description 32
- 230000000638 stimulation Effects 0.000 claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims description 40
- 210000001367 artery Anatomy 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001225 therapeutic effect Effects 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000035475 disorder Diseases 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 208000037816 tissue injury Diseases 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/36125—Details of circuitry or electric components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/36128—Control systems
- A61N1/36142—Control systems for improving safety
Landscapes
- Health & Medical Sciences (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electrotherapy Devices (AREA)
Abstract
The utility model provides a kind of nerve stimulator, including stimulus, is connected at least two stimulation accesses and the overvoltage crowbar of the stimulus.The overvoltage crowbar includes control chip, voltage comparator and reference voltage module; the voltage comparator has first input end, the second input terminal and the output end for being connected to the control chip, and the first input end is connected to the stimulus and to receive operating voltage；Second input terminal is connected to the reference voltage module and to receive reference voltage.By the reference voltage of comparison operating voltage and the output of reference voltage module, the open circuit that can identify that stimulation access occurs in time is abnormal, stops stimulus output.The overvoltage crowbar is simple for structure, can be realized the open circuit detection of stimulation access, avoids in a plurality of stimulation access operation irregularity and possible body injury caused by partial failure.
Description
Technical field
The utility model relates to technical field of medical equipment more particularly to a kind of nerve stimulators.
Background technique
Nerve stimulator has significant curative effect to certain nervous disorder illnesss, and has minimal invasive and safety, in recent years
To have started to be widely used in clinical treatment.Existing nerve stimulator includes stimulus, conducting wire and electrode, caused by stimulus
Pulse current acts on limb tissue by electrode, to realize the treatment of certain diseases or the rehabilitation of limb function.
Existing nerve stimulator includes that constant pressure stimulus modality and constant current stimulus modality are used compared to constant pressure stimulus modality
The nerve stimulator of constant current stimulus modality is not influenced by human body impedance variation, but relative energy consumption is big, and structure is relative complex.It removes
This generally requires a plurality of stimulation access and works at the same time to realize better therapeutic effect.As shown in Figure 1,101 ' connection of stimulus
It is provided with a plurality of 102 ' of stimulation access, when wherein one or more stimulation 102 ' of access opens a way, residue stimulation access
102 ' are the stabilization for maintaining electric current, and voltage increases with it, and overstimulation may cause adverse reaction, influence therapeutic effect, even
Human tissue injury occurs.CN107802958A discloses a kind of open circuit detection module for nerve stimulator, passes through voltage
Comparator detects the voltage for the sample resistance for being serially connected with stimulation access to judge whether corresponding stimulation access opens a way, but
For it is a plurality of stimulation access detection need control module carry out real-time control and switching, increase control chip performance requirement and
System power dissipation.
In consideration of it, it is necessary to provide a kind of new nerve stimulators.
Utility model content
It is simple for structure the purpose of this utility model is to provide a kind of nerve stimulator, stimulation access can be identified in time
Open circuit it is abnormal, it is ensured that at least two stimulation accesses for being connected to stimulus work at the same time, and meet Treatment need, avoid excessively piercing
Swash.
To realize above-mentioned purpose of utility model, the utility model provides a kind of nerve stimulator, including stimulus, connection
To at least two stimulation accesses and the overvoltage crowbar of the stimulus, the stimulus is to issue electric arteries and veins to stimulation access
Signal is rushed, the overvoltage crowbar includes control chip, voltage comparator and reference voltage module, the voltage comparator tool
There are first input end, the second input terminal and the output end for being connected to the control chip, the first input end is connected to described
Stimulus and to receive correspond to the electric impulse signal operating voltage；Second input terminal is connected to the benchmark electricity
Die block and the reference voltage to receive the reference voltage module output.
There is the control chip interruption being connected with the output end to draw as a further improvement of the utility model,
Foot.
The overvoltage crowbar further includes that be connected in described first defeated as a further improvement of the utility model,
Enter the diode between end and stimulus, and the first input end is connected with the cathode of the diode.
Overvoltage crowbar further includes being connected in the first input end as a further improvement of the utility model,
Divider between stimulus.
The reference voltage module includes capacitor, to fill for the capacitor as a further improvement of the utility model,
The digital analog converter of electricity and the first switch being arranged between the digital analog converter and capacitor, one end ground connection of the capacitor,
The other end of the capacitor is connected to the second input terminal of the voltage comparator.
The reference voltage module further includes being connected in the voltage ratio as a further improvement of the utility model,
Compared between device and capacitor and the analog-digital converter to acquire capacitance voltage.
The reference voltage module further includes being arranged in the analog-digital converter as a further improvement of the utility model,
Second switch between capacitor.
The reference voltage module further includes being arranged in the analog-digital converter as a further improvement of the utility model,
Buffer between capacitor.
The beneficial effects of the utility model are: circuit structure is succinct using the utility model nerve stimulator, pass through voltage
Comparator compares the reference voltage of operating voltage and the output of reference voltage module, then corresponding from output end to control chip output
Low level signal or high level signal, the control chip can identify that the open circuit of stimulation access is abnormal in time, it is ensured that be connected to
At least two stimulation accesses of stimulus work at the same time, and meet Treatment need, avoid overstimulation.
Detailed description of the invention
Fig. 1 is the composition schematic diagram of existing nerve stimulator；
Fig. 2 is the composition schematic diagram of the utility model nerve stimulator；
Fig. 3 is the composition schematic diagram of one preferred embodiment of the utility model nerve stimulator；
Fig. 4 is the composition schematic diagram of another preferred embodiment of the utility model nerve stimulator.
Specific embodiment
The utility model is described in detail below with reference to embodiment shown in the drawings.But the embodiment is not
Limit the utility model, structure that those skilled in the art are made according to the embodiment, method or functionally
Transformation is all contained in the protection scope of the utility model.
As shown in Fig. 2, the utility model provides a kind of nerve stimulator 100 using constant current stimulus modality, including stimulation
Source 101, the stimulation access 102 and overvoltage crowbar 103 for being connected to the stimulus 101.
Herein, the stimulation access 102 is preferably arranged at least two, and the stimulus 101 is to at least two institutes
State stimulation 102 output electric pulse signal of access.The overvoltage crowbar 103 includes control chip, voltage comparator and benchmark
Voltage module.The voltage comparator with first input end, the second input terminal and be connected to it is described control chip it is defeated
Outlet.The first input end is anode and the equivalent load for being connected to the stimulus 101 with several stimulation accesses 102
Between, to receive the operating voltage for the electric impulse signal for corresponding to the stimulus 101 output；Second input terminal is cathode
And it is connected to reference voltage module and the reference voltage to receive the reference voltage module output.The control chip has
The interrupt pin being connected with the output end, so that the control chip is without stimulation access 102 described in real-time detection
Open circuit situation saves power consumption.
Particularly, the amplitude for the electric impulse signal that the control chip is exported according to the stimulus 101, control benchmark electricity
Die block exports a reference voltage, and second input terminal receives the reference voltage.The reference voltage need to be according to stimulus 101
Actual operating conditions determine that reference voltage is higher, then when 101 output voltage of stimulus increases, the voltage compares
Device cannot export corresponding signal to control chip in time, and the stimulus 101 is opened a way abnormal feelings in part stimulation access 102
It works under condition, influences therapeutic effect, local stimulation excessively even generates body injury；Reference voltage is relatively low, then is stimulating
When source 101 works normally, the control chip issues false command according to the output signal of voltage comparator, stops stimulus
101 outputs.
Join shown in Fig. 3, is also connected between the stimulus 101 and first input end and is provided with diode D.The diode
The anode of D is connected to the stimulus 101, and the cathode of the diode D is connected with the first input end.The stimulus
It is the operating voltage that the first input end receives that 101 output voltage, which subtracts diode D pressure drop, if the operating voltage is super
Corresponding reference voltage is crossed, the voltage comparator exports high level signal, and then passes through control chip judgement stimulation access 102
It is abnormal to there is open circuit, stops stimulus 101 and exports.Certainly, the diode D can also be reduced in 101 progress of work of stimulus
The electrical interference that may be subject to.
Join shown in Fig. 4, overvoltage crowbar 103 further include be connected in the first input end and stimulus 101 it
Between divider.The biggish resistance of resistance value can be used to realize partial pressure for the divider, to reduce it to the stimulation access 102
Shunt influence；On the other hand, when the amplitude of the electric impulse signal of the stimulus 101 output is larger, the divider can have
Effect control reduces the operating voltage that the first input end of the voltage comparator receives, and avoids working beyond the voltage comparator
Range.
The reference voltage module include capacitor C, to the digital analog converter (DAC) that charges for the capacitor C and
Be arranged in first switch K1, the capacitor C between the digital analog converter and capacitor C one end ground connection, the capacitor it is another
One end is connected to the second input terminal of the voltage comparator.When the nerve stimulator 100 opens work, the control chip
First switch K1 closure is controlled, and the digital analog converter is controlled according to the electric impulse signal that stimulus 101 exports and exports one
To charge to the capacitor C, the second input terminal of this specific voltage, that is, voltage comparator receives specific voltage
Reference voltage.
It is inevitable due to itself and its between the second input terminal of voltage comparator after the capacitor C charging complete
Ground will appear electric leakage, and the voltage on the capacitor C will be slow decline.Therefore, in the present embodiment, the reference voltage module is also
Including being connected between the voltage comparator and capacitor C and the analog-digital converter to acquire capacitance voltage (ADC), institute
It states analog-digital converter to be connected with control chip, by the voltage on the analog-digital converter timing acquiring capacitor C, if voltage
Too low, digital analog converter described in the control chip controls charges again to the capacitor C.Certainly, for reduction capacitor C's
Electric leakage, the reference voltage module further include the second switch K2 being arranged between the analog-digital converter and capacitor C, and described the
Two switch K2 are set as the closure when analog-digital converter is acquired measurement, and when the analog-digital converter is measured, control
Second switch K2 processed is disconnected.
Generally, the input current of the analog-digital converter is larger, if the analog-digital converter is connected directly to described
On capacitor C, voltage on the capacitor C is more difficult to be accurately.Herein, the reference voltage module further includes that connection setting exists
Buffer between the analog-digital converter and capacitor C, to ensure more accurately to measure the voltage on capacitor C.Described second opens
When closing K2 disconnection, the control chip controls close the analog-digital converter and buffer, reduce stand-by power consumption.
In actual application, firstly, nerve stimulator 100 is opened, according to the set operating mode of stimulus 101, if
Determine the reference voltage of the quasi- output of reference voltage module；Secondly, the stimulus 101 opens work, electric impulse signal is issued, it is described
First input end receives the operating voltage corresponding to electric impulse signal, and it is defeated that second input terminal receives reference voltage module
Reference voltage out compares operating voltage and reference voltage.If operating voltage is lower than reference voltage, voltage comparator exports low electricity
Ordinary mail number, control chip judgement at least two stimulation accesses 102 are in normal operating conditions, and stimulus 101 is protected
Hold output；If operating voltage is higher than reference voltage, voltage comparator exports high level signal, the control chip judgement at least one
Item stimulates access 102 to open a way, and control stimulus 101 stops output.
Wherein, the reference voltage corresponds to the amplitude of the electric impulse signal, and the control chip is believed according to electric pulse
Number amplitude, control reference voltage module export a set reference voltage.Preferably, work is opened in the stimulus 101
During, the first switch K1 is closed once at interval of the first set duration T1, and controls number in first switch closure
Mode converter is capacitor C charging, after the capacitor C charging complete, disconnects first switch K1.
To better assure the voltage stabilization on the capacitor C, the reference voltage module is additionally provided with to capacitor C
On voltage be timed the digital analog converter, buffer and second switch K2 of measurement.The process of work is opened in stimulus 101
In, the second switch K2 is closed once at interval of the second set duration T2, and is turned in second switch K2 closure time control molding number
Parallel operation measures the voltage on capacitor C, and when being measured, and disconnects second switch K2.If the voltage that detection obtains capacitor C is lower than
Given threshold is then closed first switch K1, and controlling the digital analog converter is that the capacitor C charges, and is charging
Cheng Shi, control disconnect first switch K1.Wherein, the given threshold is less than reference voltage, and the given threshold is preferably big
It is in the operating voltage under normal operating conditions in the stimulation access 102, false triggering is avoided, influences nerve stimulator 100
Normal work.
Except this, aforementioned overvoltage crowbar 103 also can be used for only being arranged the nerve stimulator of a stimulation access 102 (not
Diagram), when open loop state occurs in the stimulation access 102, the overvoltage crowbar can detect the abnormal letter of acquisition in time
Breath, stops the output of corresponding stimulus 101, electronic device is avoided to damage, safeguard convenient for user to the nerve stimulator
Processing.
In conclusion circuit structure is succinct using the utility model nerve stimulator 100, compared by voltage comparator
The reference voltage of operating voltage and the output of reference voltage module, then corresponding low level signal is exported from output end to control chip
Or high level signal, the control chip can identify that the open circuit of stimulation access 102 is abnormal in time, it is ensured that be connected to stimulus
101 at least two stimulation accesses 102 work at the same time, and meet Treatment need, avoid overstimulation.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of nerve stimulator, including stimulus, it is connected at least two stimulation accesses and the overvoltage protection of the stimulus
Circuit, the stimulus is to issue electric impulse signal to stimulation access, it is characterised in that: the overvoltage crowbar includes control
Coremaking piece, voltage comparator and reference voltage module, the voltage comparator have first input end, the second input terminal and connection
To the output end of the control chip, the first input end is connected to the stimulus and corresponds to the electric arteries and veins to receive
Rush the operating voltage of signal；Second input terminal is connected to the reference voltage module and to receive the reference voltage mould
The reference voltage of block output.
2. nerve stimulator according to claim 1, it is characterised in that: the control chip has and the output end phase
The interrupt pin of connection.
3. nerve stimulator according to claim 1, it is characterised in that: the overvoltage crowbar further includes connection setting
Diode between the first input end and stimulus, and the first input end is connected with the cathode of the diode
It connects.
4. nerve stimulator according to claim 1, it is characterised in that: overvoltage crowbar further includes being connected in institute
State the divider between first input end and stimulus.
5. nerve stimulator according to any one of claims 1 to 4, it is characterised in that: the reference voltage module includes
Capacitor, to the digital analog converter for the capacitor charging and what is be arranged between the digital analog converter and capacitor first open
It closes, one end ground connection of the capacitor, the other end of the capacitor is connected to the second input terminal of the voltage comparator.
6. nerve stimulator according to claim 5, it is characterised in that: the reference voltage module further includes connection setting
Between the voltage comparator and capacitor and the analog-digital converter to acquire capacitance voltage.
7. nerve stimulator according to claim 6, it is characterised in that: the reference voltage module further includes being arranged in institute
State the second switch between analog-digital converter and capacitor.
8. nerve stimulator according to claim 6, it is characterised in that: the reference voltage module further includes being arranged in institute
State the buffer between analog-digital converter and capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821406392.1U CN209347925U (en) | 2018-08-29 | 2018-08-29 | Nerve stimulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821406392.1U CN209347925U (en) | 2018-08-29 | 2018-08-29 | Nerve stimulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209347925U true CN209347925U (en) | 2019-09-06 |
Family
ID=67777969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821406392.1U Active CN209347925U (en) | 2018-08-29 | 2018-08-29 | Nerve stimulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209347925U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585594A (en) * | 2019-09-24 | 2019-12-20 | 喜临门家具股份有限公司 | Current output control system and method for transcranial micro-current therapy device |
| CN110870944A (en) * | 2018-08-29 | 2020-03-10 | 苏州景昱医疗器械有限公司 | Nerve stimulator and overvoltage protection method thereof |
| CN112675424A (en) * | 2019-10-18 | 2021-04-20 | 苏州景昱医疗器械有限公司 | Stimulus source generating circuit for neural stimulator |
| EP4039323A4 (en) * | 2019-09-30 | 2023-10-11 | Sceneray Co., Ltd | Detection circuit for nerve stimulator |
-
2018
- 2018-08-29 CN CN201821406392.1U patent/CN209347925U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110870944A (en) * | 2018-08-29 | 2020-03-10 | 苏州景昱医疗器械有限公司 | Nerve stimulator and overvoltage protection method thereof |
| CN110585594A (en) * | 2019-09-24 | 2019-12-20 | 喜临门家具股份有限公司 | Current output control system and method for transcranial micro-current therapy device |
| CN110585594B (en) * | 2019-09-24 | 2024-02-06 | 喜临门家具股份有限公司 | Current output control system of transcranial micro-current treatment equipment |
| EP4039323A4 (en) * | 2019-09-30 | 2023-10-11 | Sceneray Co., Ltd | Detection circuit for nerve stimulator |
| CN112675424A (en) * | 2019-10-18 | 2021-04-20 | 苏州景昱医疗器械有限公司 | Stimulus source generating circuit for neural stimulator |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Building C16, biological nano Park, 218 Xinghu street, Suzhou Industrial Park, Jiangsu Province Patentee after: Jingyu Medical Technology (Suzhou) Co.,Ltd. Address before: Building C16, Bionano Park, No. 218 Xinghu Street, Suzhou City, Jiangsu Province, 215123 Patentee before: SCENERAY Co.,Ltd. |