CN215652520U - Cardio-pulmonary resuscitation machine - Google Patents
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- CN215652520U CN215652520U CN202120844397.8U CN202120844397U CN215652520U CN 215652520 U CN215652520 U CN 215652520U CN 202120844397 U CN202120844397 U CN 202120844397U CN 215652520 U CN215652520 U CN 215652520U
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Abstract
The utility model discloses a cardio-pulmonary resuscitation machine, which adopts the technical scheme that a host and a battery accessory are separately arranged, a power supply end of a battery pack is connected into an inverted input end of a voltage comparison circuit through a second voltage division circuit to serve as a judgment voltage, an output end of a voltage reduction type conversion circuit is connected into a non-inverted input end of the voltage comparison circuit through a first voltage division circuit to serve as a reference voltage, the reference voltage and the judgment voltage are input into the voltage comparison circuit, an output end of the voltage comparison circuit is connected into an electric quantity display control circuit, and the residual electric quantity of the battery accessory is judged according to the electric quantity display control circuit.
Description
Technical Field
The utility model relates to the technical field of machine equipment, in particular to a cardio-pulmonary resuscitation machine.
Background
At present, current cardiopulmonary resuscitation machine can reduce the volume of battery for the convenience of guaranteeing to carry, so can make the battery electric quantity too low, lead to duration weak, and the battery is placed for a long time in addition, and the electric quantity of battery can reduce gradually, when the check out test set electric quantity, just can learn the residual capacity after the start, not only brings inconvenience for medical personnel check out test set, and the switch-on and switch-off can also cause extra electric quantity extravagant moreover each time.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a cardio-pulmonary resuscitation machine, and aims to solve the technical problem that electric energy is wasted due to startup and shutdown when the electric quantity of equipment is checked in the prior art.
In order to achieve the purpose, the utility model provides a cardio-pulmonary resuscitation machine, which comprises a host machine and a battery accessory, wherein the host machine and the battery accessory are separately arranged, and the battery accessory comprises a battery pack, a voltage-reducing conversion circuit and a plurality of electric quantity display circuits; wherein,
the power supply end of the battery pack is connected with the host through a lead with a preset length, and the power supply end of the battery pack is also connected with the input end of the buck conversion circuit;
the electric quantity display circuit comprises a first voltage division circuit, a second voltage division circuit, a voltage comparison circuit and a display control circuit; wherein,
the input end of the first voltage division circuit is connected with the output end of the buck conversion circuit, and the output end of the first voltage division circuit is connected with the positive phase input end of the voltage comparison circuit;
the input end of the second voltage division circuit is connected with the power supply end of the battery pack, and the output end of the second voltage division circuit is connected with the inverting input end of the voltage comparison circuit;
and the output end of the voltage comparison circuit is connected with the input end of the display control circuit.
Optionally, the first voltage dividing circuit comprises a first resistor and a second resistor; wherein,
one end of the first resistor is connected with the second resistor in series, the other end of the first resistor is connected with the output end of the buck conversion circuit, one end of the second resistor is grounded, and the other end of the second resistor is connected with the positive phase input end of the voltage comparison circuit.
Optionally, the second voltage division circuit includes a third resistor, a fourth resistor, and a fifth resistor; wherein,
one end of the third resistor is connected with the fifth resistor in series, the other end of the third resistor is connected with the power supply end of the battery pack, the fourth resistor is connected with the third resistor in parallel, one end of the fifth resistor is grounded, and the other end of the fifth resistor is connected with the inverting input end of the voltage comparison circuit.
Optionally, the voltage comparison circuit comprises a voltage comparator, a sixth resistor, a seventh resistor and a first capacitor; wherein,
one end of the sixth resistor is connected with the output end of the buck conversion circuit, the other end of the sixth resistor is connected with the output end of the voltage comparator, one end of the first capacitor is connected with the output end of the buck conversion circuit, the other end of the first capacitor is grounded, one end of the seventh resistor is connected with the positive phase input end of the voltage comparator, and the other end of the seventh resistor is connected with the output end of the voltage comparator.
Optionally, the display control circuit includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second capacitor, a third capacitor, a first triode, a second triode, and an indicator light; wherein,
one end of the eighth resistor is connected with the output end of the voltage comparison circuit, and the other end of the eighth resistor is connected with the base electrode of the first triode;
one end of the second capacitor is connected with the base electrode of the first triode, the other end of the second capacitor is grounded, the ninth resistor is connected with the second capacitor in parallel, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with one end of the tenth resistor, and the other end of the tenth resistor is connected with the output end of the buck conversion circuit;
one end of the eleventh resistor is connected with a collector electrode of the first triode, the other end of the eleventh resistor is connected with a base electrode of the second triode, one end of the twelfth resistor is connected with the base electrode of the second triode, the other end of the twelfth resistor is grounded, the third capacitor is connected with the twelfth resistor in parallel, the collector electrode of the second triode is connected with the indicator light, an emitting electrode of the second triode is grounded, one end of the thirteenth resistor is connected with an output end of the voltage-reducing conversion circuit, and the other end of the second triode is connected with the indicator light.
Optionally, the voltage comparator is a LM393 type voltage comparator.
Optionally, the first transistor and the second transistor in the display control circuit are NPN transistors.
The technical scheme of the utility model provides a cardio-pulmonary resuscitation machine which comprises a host and battery accessories, wherein the host and the battery accessories are separately arranged, and the battery accessories comprise a battery pack, a voltage-reducing conversion circuit and a plurality of electric quantity display circuits; the power supply end of the battery pack is connected with the host through a lead with a preset length, and the power supply end of the battery pack is also connected with the input end of the buck conversion circuit; the electric quantity display circuit comprises a first voltage division circuit, a second voltage division circuit, a voltage comparison circuit and a display control circuit; the input end of the first voltage division circuit is connected with the output end of the buck conversion circuit, and the output end of the first voltage division circuit is connected with the positive phase input end of the voltage comparison circuit; the input end of the second voltage division circuit is connected with the power supply end of the battery pack, and the output end of the second voltage division circuit is connected with the inverting input end of the voltage comparison circuit; the output end of the voltage comparison circuit is connected with the input end of the display control circuit, and the main machine of the cardio-pulmonary resuscitation machine and the battery accessories are separately arranged, the power supply end of the battery pack is connected with the reverse phase input end of the voltage comparison circuit through the second voltage division circuit to serve as judgment voltage, the output end of the voltage reduction type conversion circuit is connected with the normal phase input end of the voltage comparison circuit through the first voltage division circuit to serve as reference voltage, and the output end of the voltage comparator is connected with the electric quantity display control circuit, so that the residual electric quantity of the battery accessories is judged according to the electric quantity display control circuit, the technical problem of electric energy waste caused by power on and off during equipment electric quantity inspection in the prior art is solved, and the technical effects of quickly inspecting the electric quantity of the cardio-pulmonary resuscitation machine and saving the electric energy are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first voltage dividing circuit and a second voltage dividing circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a voltage comparison circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display control circuit according to an embodiment of the utility model.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
20 | |
| 201 | |
202 | Battery pack |
| 2031 | A first voltage dividing |
2032 | Second |
| 2033 | |
2034 | Display control circuit |
| D | Power supply terminal of battery pack | IN1 | Input end of buck conversion circuit |
| OUT1 | Output end of buck conversion circuit | IN2 | Input terminal of first voltage division circuit |
| IN3 | Second voltage division circuitInput terminal of | OUT3 | Output terminal of the second voltage division circuit |
| IN4 | Inverting input terminal of voltage comparison circuit | IN5 | Positive phase input end of voltage comparison circuit |
| OUT4 | Output terminal of voltage comparison circuit | IN6 | Input terminal of display control circuit |
| R1 | A first resistor | R2 | Second resistance |
| R3 | Third resistance | R4 | Fourth resistor |
| R5 | Fifth resistor | R6 | Sixth resistor |
| R7 | Sixth resistor | R14 | Sixth resistor |
| R15 | Sixth resistor | C1 | First capacitor |
| GND | Grounding terminal | R8 | Eighth resistor |
| C2 | Second capacitor | R9 | Ninth resistor |
| R10 | Tenth resistor | R11 | Eleventh resistor |
| R12 | Twelfth resistor | R13 | Thirteenth resistor |
| Q1 | A first triode | Q2 | Second triode |
| C3 | Third capacitor | D1 | Indicator light |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a cardio-pulmonary resuscitation machine.
Referring to fig. 1, in an embodiment of the present invention, the cardiopulmonary resuscitation machine includes a host 10 and a battery assembly 20, where the host 10 and the battery assembly 20 are separately disposed, and the battery assembly includes a battery pack 202, a voltage-reducing conversion circuit 201, and a plurality of power display circuits 203; wherein,
the power supply end of the battery pack 202 is connected with the host computer 10 through a lead with a preset length, and the power supply end of the battery pack 202 is also connected with the input end of the buck conversion circuit 201;
the electric quantity display circuit includes a first voltage dividing circuit 2031, a second voltage dividing circuit 2032, a voltage comparing circuit 2033, and a display control circuit 2034; wherein,
an input end of the first voltage dividing circuit 2031 is connected to an output end of the buck conversion circuit 201, and an output end of the first voltage dividing circuit 2031 is connected to a non-inverting input end of the voltage comparing circuit 2032;
an input terminal of the second voltage dividing circuit 2032 is connected to a power supply terminal of the battery pack 202, and an output terminal of the second voltage dividing circuit 2032 is connected to an inverting input terminal of the voltage comparing circuit 2033;
the output terminal of the voltage comparison circuit 2033 is connected to the input terminal of the display control circuit 2034.
It should be understood that the supply voltage of the battery pack can control the magnitude of the output voltage through the buck conversion circuit, the power display circuit further comprises a key circuit, when the residual power of the equipment needs to be checked, a key switch in the key circuit is pressed to connect the battery pack with the buck conversion circuit and the second voltage division circuit, and the power display circuit is connected to display the residual power of the battery.
It can be understood that the buck conversion circuit converts the power supply voltage and inputs the converted voltage to the first voltage division circuit, and after voltage division, the output voltage of the first voltage division circuit is input to the non-inverting input terminal of the voltage comparison circuit as the reference voltage.
It can be understood that the power supply terminal of the battery pack is directly connected with the reverse input terminal of the voltage comparison circuit as the judgment voltage, and the power supply voltage of the battery pack changes along with the change of the electric quantity of the battery pack.
It can be understood that, cardiopulmonary resuscitation machine of this embodiment, host computer and battery accessories set up separately, and battery accessories's group battery is connected with the host computer through the wire of predetermineeing length, for host computer work provides the electric energy, in the in-service use, can select the group battery of different capacity according to the use scene of difference, under the prerequisite of guaranteeing continuation of the journey, can not increase cardiopulmonary resuscitation machine's volume, the wire of predetermineeing length is the wire of connecting host computer and group battery for the host computer power supply of selecting according to actual conditions.
It is to be understood that the voltage output from the first voltage dividing circuit to the positive input terminal of the voltage comparing circuit is used as a reference voltage, the voltage input from the second voltage dividing circuit to the negative input terminal of the voltage comparing circuit is used as a determination voltage, the voltage comparing circuit outputs a high level when the voltage at the positive input terminal is greater than the voltage at the negative input terminal, the voltage comparing circuit outputs a low level when the voltage at the positive input terminal is less than the voltage at the negative input terminal, and the voltage output from the voltage comparing circuit is input to the display control circuit, so that the remaining amount of electricity is determined according to the display control circuit.
It should be understood that the present embodiment includes a plurality of power display circuits, and different power display circuits can reflect the remaining power of the battery.
The cardiopulmonary resuscitation machine comprises a host and a battery accessory, wherein the host and the battery accessory are separately arranged, and the battery accessory comprises a battery pack, a voltage reduction type conversion circuit and a plurality of electric quantity display circuits; the power supply end of the battery pack is connected with the host through a lead with a preset length, and the power supply end of the battery pack is also connected with the input end of the buck conversion circuit; the electric quantity display circuit comprises a first voltage division circuit, a second voltage division circuit, a voltage comparison circuit and a display control circuit; the input end of the first voltage division circuit is connected with the output end of the buck conversion circuit, and the output end of the first voltage division circuit is connected with the positive phase input end of the voltage comparison circuit; the input end of the second voltage division circuit is connected with the power supply end of the battery pack, and the output end of the second voltage division circuit is connected with the inverting input end of the voltage comparison circuit; the output end of the voltage comparison circuit is connected with the input end of the display control circuit, and the main machine of the cardio-pulmonary resuscitation machine and the battery accessories are separately arranged, the power supply end of the battery pack is connected with the reverse phase input end of the voltage comparison circuit through the second voltage division circuit to serve as judgment voltage, the output end of the voltage reduction type conversion circuit is connected with the normal phase input end of the voltage comparison circuit through the first voltage division circuit to serve as reference voltage, and the output end of the voltage comparator is connected with the electric quantity display control circuit, so that the residual electric quantity of the battery accessories is judged according to the electric quantity display control circuit, the technical problem of electric energy waste caused by power on and off during equipment electric quantity inspection in the prior art is solved, and the technical effects of quickly inspecting the electric quantity of the cardio-pulmonary resuscitation machine and saving the electric energy are achieved.
Further, referring to fig. 2, the first voltage dividing circuit 2031 includes a first resistor R1 and a second resistor R2; wherein,
one end of the first resistor R1 is connected IN series with the second resistor R2, the other end of the first resistor R1 is connected with the output end OUT1 of the buck converter circuit, one end of the second resistor R2 is connected to the ground GND, and the other end of the second resistor R2 is connected with the non-inverting input end IN5 of the voltage comparator circuit.
It can be understood that the input voltage at the positive phase input end of the voltage comparison circuit is the voltage at the two ends of the resistor R2, and can be calculated according to the output voltage of the buck change circuit and the resistance values of the resistor R1 and the resistor R2, and in practical applications, a resistor with a proper resistance value can be selected according to different use scenarios.
Further, referring to fig. 2, the second voltage dividing circuit 2032 includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5; wherein,
one end of the third resistor R3 is connected IN series with the fifth resistor R5, the other end of the third resistor R3 is connected with the power supply end D of the battery pack, the fourth resistor R4 is connected IN parallel with the third resistor R3, one end of the fifth resistor R5 is grounded, and the other end of the fifth resistor R5 is connected with the inverting input end IN4 of the voltage comparison circuit.
It can be understood that the input voltage at the inverting input terminal of the voltage comparison circuit is the voltage across the resistor R5, and the resistance value of each resistor can be determined according to actual conditions.
Further, referring to fig. 3, the voltage comparison circuit includes a voltage comparator LM393, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1; wherein,
one end of the sixth resistor R6 is connected with the output end OU1 of the buck converter circuit, the other end of the sixth resistor R6 is connected with the output end OUT4 of the voltage comparator, one end of the first capacitor C1 is connected with the output end OUT1 of the buck converter circuit, the other end of the first capacitor C1 is grounded, one end of the seventh resistor R7 is connected with the positive-phase input end OUT2 of the voltage comparator, and the other end of the seventh resistor R7 is connected with the output end OUT4 of the voltage comparator.
It can be understood that pin 3 and pin 5 of LM393 are non-inverting inputs, pin 2 and pin 6 are inverting inputs, pin 1 and pin 7 are outputs, pin 8 is a power supply, and pin 4 is a ground terminal, and in use, pin 8 is connected to a buck converter circuit to supply power to LM393, and in power supply, capacitor C1 is connected and grounded to perform a filtering function, pin 4 is grounded, pin 1, pin 2 and pin 3 are used as a set of inputs and outputs, and pin 5, pin 6 and pin 7 are used as a set of inputs and outputs.
It should be understood that the resistor R6 is used as a pull-up resistor and connected to the output terminal of the buck converter circuit, so that when there is no output signal from the LM393, the output terminal is at a high voltage, and one end of the resistor R7 is connected to the output terminal OUT4 of the LM393, and the other end is connected to the non-inverting input terminal IN5, thereby forming a hysteresis comparator circuit, which can improve the anti-interference capability of the circuit.
In a specific implementation, a plurality of electric quantity display circuits may be provided, and each electric quantity display circuit has the same structure, wherein the resistances of the resistors in the first voltage-dividing circuit of each electric quantity display circuit are equal, for example, there are two electric quantity display circuits 1 and 2, wherein the value of the first resistor in the first voltage-dividing circuit of the electric quantity display circuit 1 is 20K, and the value of the second resistor is 18K, then the value of the first resistor in the first voltage-dividing circuit of the electric quantity display circuit 2 is also 20K, and the value of the second resistor is 18K.
Further, referring to fig. 4, the display control circuit includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a second capacitor C2, a third capacitor C3, a first transistor Q1, a second transistor Q2, and an indicator light D1; wherein,
one end of the eighth resistor R8 is connected with the output end OUT4 of the voltage comparison circuit, and the other end of the eighth resistor R8 is connected with the base electrode of the first triode Q1;
one end of the second capacitor C2 is connected to the base of the first transistor Q1, the other end of the second capacitor C2 is grounded, the ninth resistor R9 is connected in parallel to the second capacitor C2, the emitter of the first transistor Q1 is grounded, the collector of the first transistor Q1 is connected to one end of the tenth resistor R10, and the other end of the tenth resistor R10 is connected to the output OU1 of the buck converter circuit;
one end of the eleventh resistor R11 is connected to a collector of the first triode Q1, the other end of the eleventh resistor R11 is connected to a base of the second triode Q2, one end of the twelfth resistor R12 is connected to a base of the second triode Q2, the other end of the twelfth resistor R12 is grounded, the third capacitor C3 is connected in parallel to the twelfth resistor R12, a collector of the second triode Q2 is connected to the indicator light D1, an emitter of the second triode Q2 is grounded, one end of the thirteenth resistor R13 is connected to the output OU1 of the buck conversion circuit, and the other end of the second triode Q2 is connected to the indicator light D1.
It can be understood that when no output signal is provided by LM393, the output terminal of LM393 is connected to the pull-up resistor, the output terminal is at a high level, and at this time, transistor Q1 is turned on, Q2 is turned off, and the indicator light is not on; when the output end of the LM393 outputs a low level, the triode Q1 is disconnected, the Q2 is conducted, and the indicator light is turned on.
In a specific implementation, for example, there are two electricity quantity display circuits 1 and 2, where the first resistance of the first voltage division circuit of the two electricity quantity display circuits 1 and 2 is 20K, the second resistance is 18K, and the output voltage of the buck conversion circuit is 5V; the resistance value in the second voltage division circuit of the electric quantity display circuit 1 is as follows: the third resistor is 6.2K, the fourth resistor is 15K, and the fifth resistor is 1K; the resistance value in the second voltage division circuit of the electric quantity display circuit 2 is as follows: the third resistance is 8.2K, the fourth resistance is 12K, and the fifth resistance is 1K, so that it can be calculated that the output voltage of the first voltage-dividing circuit of the power display circuits 1 and 2 is 2.368V, the output voltage of the second voltage-dividing circuit of the power display circuit 1 is 0.186Vd, and the output voltage of the second voltage-dividing circuit of the power display circuit 2 is 0.17Vd, where Vd is the battery pack power supply terminal voltage, for the power display circuit 1: when 0.186Vd is greater than 2.368V, namely Vd is greater than 12.73V, the output end of LM393 outputs a low level; for the electricity amount display circuit 2: when 0.17Vd is greater than 2.368V, namely Vd is greater than 13.93V, the output end of LM393 outputs a low level, at this time, when the voltage of the power supply end of the battery pack is greater than 13.92V, the indicator lamps of the two display control circuits are on, when the voltage of the power supply end of the battery pack is greater than 12.73V and less than 13.92V, the indicator lamp corresponding to the electric quantity display circuit 1 is on, and when the voltage of the power supply end of the battery pack is less than 12.73V, the indicator lamps corresponding to the two electric quantity display circuits are not on, so that the residual electric quantity of the battery pack is displayed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A cardio-pulmonary resuscitation machine comprises a host machine and a battery accessory, and is characterized in that the host machine and the battery accessory are separately arranged, and the battery accessory comprises a battery pack, a voltage-reducing conversion circuit and a plurality of electric quantity display circuits; wherein,
the power supply end of the battery pack is connected with the host through a lead with a preset length, and the power supply end of the battery pack is also connected with the input end of the buck conversion circuit;
the electric quantity display circuit comprises a first voltage division circuit, a second voltage division circuit, a voltage comparison circuit and a display control circuit; wherein,
the input end of the first voltage division circuit is connected with the output end of the buck conversion circuit, and the output end of the first voltage division circuit is connected with the positive phase input end of the voltage comparison circuit;
the input end of the second voltage division circuit is connected with the power supply end of the battery pack, and the output end of the second voltage division circuit is connected with the inverting input end of the voltage comparison circuit;
and the output end of the voltage comparison circuit is connected with the input end of the display control circuit.
2. The cardiopulmonary resuscitation machine of claim 1, wherein the first voltage divider circuit comprises a first resistor and a second resistor; wherein,
one end of the first resistor is connected with the second resistor in series, the other end of the first resistor is connected with the output end of the buck conversion circuit, one end of the second resistor is grounded, and the other end of the second resistor is connected with the positive phase input end of the voltage comparison circuit.
3. The cardiopulmonary resuscitation device of claim 1, wherein the second voltage divider circuit comprises a third resistor, a fourth resistor, and a fifth resistor; wherein,
one end of the third resistor is connected with the fifth resistor in series, the other end of the third resistor is connected with the power supply end of the battery pack, the fourth resistor is connected with the third resistor in parallel, one end of the fifth resistor is grounded, and the other end of the fifth resistor is connected with the inverting input end of the voltage comparison circuit.
4. The cardiopulmonary resuscitation device of claim 1, wherein the voltage comparison circuit comprises a voltage comparator, a sixth resistor, a seventh resistor, and a first capacitor; wherein,
one end of the sixth resistor is connected with the output end of the buck conversion circuit, the other end of the sixth resistor is connected with the output end of the voltage comparator, one end of the first capacitor is connected with the output end of the buck conversion circuit, the other end of the first capacitor is grounded, one end of the seventh resistor is connected with the positive phase input end of the voltage comparator, and the other end of the seventh resistor is connected with the output end of the voltage comparator.
5. The cardiopulmonary resuscitation device of claim 1, wherein the display control circuit comprises an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second capacitor, a third capacitor, a first transistor, a second transistor, and an indicator light; wherein,
one end of the eighth resistor is connected with the output end of the voltage comparison circuit, and the other end of the eighth resistor is connected with the base electrode of the first triode;
one end of the second capacitor is connected with the base electrode of the first triode, the other end of the second capacitor is grounded, the ninth resistor is connected with the second capacitor in parallel, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with one end of the tenth resistor, and the other end of the tenth resistor is connected with the output end of the buck conversion circuit;
one end of the eleventh resistor is connected with a collector electrode of the first triode, the other end of the eleventh resistor is connected with a base electrode of the second triode, one end of the twelfth resistor is connected with the base electrode of the second triode, the other end of the twelfth resistor is grounded, the third capacitor is connected with the twelfth resistor in parallel, the collector electrode of the second triode is connected with the indicator light, an emitting electrode of the second triode is grounded, one end of the thirteenth resistor is connected with an output end of the voltage-reducing conversion circuit, and the other end of the second triode is connected with the indicator light.
6. The cardiopulmonary resuscitation device of claim 4, wherein said voltage comparator is an LM393 type voltage comparator.
7. The cardiopulmonary resuscitation device of claim 5, wherein the first transistor and the second transistor in the display control circuit are NPN transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120844397.8U CN215652520U (en) | 2021-04-22 | 2021-04-22 | Cardio-pulmonary resuscitation machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120844397.8U CN215652520U (en) | 2021-04-22 | 2021-04-22 | Cardio-pulmonary resuscitation machine |
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| CN215652520U true CN215652520U (en) | 2022-01-28 |
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| CN202120844397.8U Active CN215652520U (en) | 2021-04-22 | 2021-04-22 | Cardio-pulmonary resuscitation machine |
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