CN219980506U - Power supply switching control circuit and medical instrument - Google Patents
Power supply switching control circuit and medical instrument Download PDFInfo
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- CN219980506U CN219980506U CN202222569759.4U CN202222569759U CN219980506U CN 219980506 U CN219980506 U CN 219980506U CN 202222569759 U CN202222569759 U CN 202222569759U CN 219980506 U CN219980506 U CN 219980506U
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Abstract
The utility model discloses a power supply switching control circuit and a medical instrument, wherein the power supply switching control circuit comprises: the device comprises a first MOS tube, a second MOS tube and a diode, wherein the grid electrode of the first MOS tube is electrically connected with a wired power supply, and the drain electrode of the first MOS tube is electrically connected with a battery power supply; the grid electrode of the second MOS tube is electrically connected with the wired power supply, and the source electrode of the second MOS tube is electrically connected with the source electrode of the first MOS tube; the positive pole of diode is connected with wired power electricity, and the negative pole of diode is connected with the drain electrode and the load electricity of second MOS pipe respectively. When the wired power supply is adopted to supply power, the first MOS tube and the second MOS tube are in the cut-off state, so that the power supply passage of the battery power supply is cut off, the energy of the battery power supply is not consumed at the moment, the service life of the battery power supply is prolonged, meanwhile, the body diode of the first MOS tube is cut off, a charging passage does not exist in the power supply switching control circuit, and reverse charging of the battery power supply is avoided, so that the service life of the battery power supply is prolonged.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a power supply switching control circuit and a medical instrument.
Background
The pedal controller is widely applied to medical instruments at present, the pedal controller is connected to the medical instruments, when in operation, a doctor tramples the pedal controller, the pedal controller converts the trampling force of the doctor into a driving signal, the driving signal is transmitted to control equipment through the pedal controller and a connecting wire thereof, the control of the medical instruments is realized, and the power of the medical instruments is regulated.
The power supply mode adopted by the existing foot controller comprises the wired connection power supply of a host and the power supply of a battery. When the pedal controller is powered by a wired power supply, due to different pressure differences between the wired power supply and the battery power supply, the pedal controller is not automatically switched to the wired power supply, and at the moment, the battery power is still supplied by the battery power supply to consume battery energy, and the power supply is stopped until the battery power supply is consumed to a certain degree, so that the service life of the battery is shortened; and when the pedal controller is switched to the wired power supply, the wired power supply is reversely charged at the same time because the pedal controller does not perform reverse charging protection design, and the battery power supply adopts a dry battery, so that the battery is expanded and damaged, and the service life of the battery power supply is shortened.
Disclosure of Invention
The utility model mainly aims to provide a power supply switching control circuit and a medical instrument, and aims to solve the technical problem that the service life of a battery power supply is shortened due to untimely power supply switching and reverse charging of the battery power supply when the conventional foot controller adopts a wired power supply for power supply.
In order to achieve the above object, the present utility model provides a power supply switching control circuit including:
the grid electrode of the first MOS tube is electrically connected with a wired power supply, and the drain electrode of the first MOS tube is electrically connected with a battery power supply;
the grid electrode of the second MOS tube is electrically connected with the wired power supply, and the source electrode of the second MOS tube is electrically connected with the source electrode of the first MOS tube;
and the anode of the diode is electrically connected with the wired power supply, and the cathode of the diode is electrically connected with the drain electrode of the second MOS tube and the load respectively.
Further, the first MOS tube and the second MOS tube are PMOS tubes.
Further, the power supply switching control circuit further comprises a first resistor;
the wired power supply is electrically connected with the grid electrode of the first MOS tube and the grid electrode of the second MOS tube through the first resistor respectively.
Further, the power supply switching control circuit further comprises a second resistor;
one end of the second resistor is electrically connected with the first resistor, the grid electrode of the first MOS tube and the grid electrode of the second MOS tube respectively, and the other end of the second resistor is grounded.
Further, the power supply switching control circuit further comprises a first capacitor;
one end of the first capacitor is electrically connected with the first resistor, the grid electrode of the first MOS tube and the grid electrode of the second MOS tube respectively, and the other end of the first capacitor is grounded.
Further, the power supply switching control circuit further comprises a second capacitor;
one end of the second capacitor is electrically connected with the wired power supply and the anode of the diode respectively, and the other end of the second capacitor is grounded.
Further, the power supply switching control circuit further comprises a third capacitor;
one end of the third capacitor is electrically connected with the cathode of the diode, the drain electrode of the second MOS tube and the load respectively, and the other end of the third capacitor is grounded.
Further, the power supply switching control circuit further comprises a fourth capacitor;
one end of the fourth capacitor is respectively grounded with the cathode of the diode, the drain electrode of the second MOS tube and the load, and the other end of the fourth capacitor is grounded.
Further, the load includes a foot controller of the medical device.
The utility model also provides a medical instrument which comprises the power supply switching control circuit and a foot controller.
According to the technical scheme, when the wired power supply is adopted for power supply, the first MOS tube Q1 and the second MOS tube Q2 are in the cut-off state, so that a power supply passage of the battery power supply is cut off, and the energy of the battery power supply cannot be consumed at the moment, so that the service life of the battery power supply is prolonged. And when the wired power supply is adopted to supply power, the wired power supply supplies power to the load through the diode D1 capable of preventing reverse connection, and as the first MOS tube Q1 and the second MOS tube Q2 are in the cut-off state, the condition that a charging path is formed through the first MOS tube Q1 and the second MOS tube Q2 does not exist, and meanwhile, as the body diode of the first MOS tube Q1 is reversely connected, the body diode of the first MOS tube Q1 is cut off, and further, the condition that the charging path is formed through the body diode of the first MOS tube Q1 and the body diode of the second MOS tube Q2 does not exist during the wired power supply, so that the anti-recoil function of the power supply switching control circuit can be realized, the battery power supply is prevented from being reversely charged, the service life of the battery power supply is prolonged, and the pedal controller is prevented from being damaged due to reverse charging.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of a power switching control circuit according to the present utility model.
Fig. 2 is a schematic structural view of the medical device of the present utility model.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a power supply switching control circuit.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of an embodiment of a power switching control circuit according to the present utility model.
In the embodiment of the present utility model, as shown in fig. 1, the power supply switching control circuit includes a first MOS transistor Q1, a second MOS transistor Q2, and a diode D1.
The grid electrode G of the first MOS tube Q1 is electrically connected with a wired power supply ZJ, and the drain electrode D of the first MOS tube Q1 is electrically connected with a battery power supply VBATF;
the grid electrode G of the second MOS tube Q2 is electrically connected with a wired power supply, and the source electrode S of the second MOS tube Q2 is electrically connected with the source electrode S of the first MOS tube Q1;
the positive pole of the diode D1 is electrically connected with the wired power supply, and the negative pole of the diode D1 is electrically connected with the drain electrode D of the second MOS tube Q2 and the load respectively. I.e. the output Vout of the power switching control circuit is electrically connected to a load, wherein the load comprises a foot controller of the medical device.
The first MOS transistor Q1 and the second MOS transistor Q2 are PMOS transistors, and the turn-on voltage Ugs (on) of the PMOS transistors is-1.5V. Because the PMOS tube has quite low power consumption, only tens of millivolts of loss, the low power consumption of the power supply switching control circuit can be realized, the service life of a battery power supply is further prolonged, and meanwhile, the cost of the PMOS tube is low, and the cost of the power supply switching control circuit can be reduced. The rated voltage of the battery power supply is 6V, the maximum voltage of the battery power supply is about 6.5V and less than 6.5V, and the voltage of the wired power supply is 5V.
In this embodiment, when the wired power supply is used to supply power to the load, the 5V wired power supply supplies power to the load through the anti-reverse diode D1, and at the same time, the gate of the first MOS transistor Q1 and the gate of the second MOS transistor Q2 are at a high level of about 5V, because the maximum voltage of the battery power supply is about 6.5V, and the voltages of the source of the first MOS transistor Q1 and the source of the second MOS transistor Q2 are less than 6.5V, the first MOS transistor Q1 and the second MOS transistor Q2 do not have the condition that Ugs is less than or equal to-1.5V, and no matter what the voltage difference between the host power supply (wired power supply) and the battery power supply is, when the wired power supply supplies power, the first MOS transistor Q1 and the second MOS transistor Q2 are in an off state, so that the power supply path of the battery power supply is cut off, and the service life of the battery power supply is not consumed.
In addition, when the wired power supply is adopted, the first MOS tube Q1 and the second MOS tube Q2 are in the cut-off state, so that the condition that a charging path is formed through the first MOS tube Q1 and the second MOS tube Q2 does not exist, meanwhile, the body diode (also called a parasitic diode) of the first MOS tube Q1 is reversely connected, the body diode (also called a parasitic diode) of the first MOS tube Q1 is cut off, the condition that the charging path is formed through the body diode of the first MOS tube Q1 and the body diode of the second MOS tube Q2 does not exist when the wired power supply is adopted, the anti-recoil function of the power supply switching control circuit can be realized, reverse charging of a battery power supply is avoided, the service life of the battery power supply is prolonged, and the foot controller is prevented from being damaged due to reverse charging.
When the wired power supply is disconnected, the grid electrode G of the first MOS tube Q1 is at a low level, the grid electrode G of the second MOS tube Q2 is at a low level, the battery power supply is conducted through the body diode of the first MOS tube Q1, so that the source electrode S of the first MOS tube Q1 is at a low level, the source electrode S of the second MOS tube Q2 is at a high level, and then the first MOS tube Q1 and the second MOS tube Q2 are in a conducting state, and the battery power supply supplies power to a load through the first MOS tube Q1 and the second MOS tube Q2.
Further, in an embodiment, referring to fig. 1, the power supply switching control circuit further includes a first resistor R1, and the wired power supply is electrically connected to the gate G of the first MOS transistor Q1 and the gate G of the second MOS transistor Q2 through the first resistor R1.
Preferably, referring to fig. 1, the power supply switching control circuit further includes a second resistor R2; one end of the second resistor R2 is electrically connected to the first resistor R1, the gate G of the first MOS transistor Q1, and the gate G of the second MOS transistor Q2, respectively, and the other end is grounded.
In this embodiment, the voltage of the gate G of the first MOS transistor Q1 and the voltage of the gate G of the second MOS transistor Q2 can be reduced by the voltage division of the first resistor R1. The resistance of the second resistor is larger than that of the first resistor, and the voltage of the grid G of the first MOS tube Q1 and the voltage of the grid G of the second MOS tube Q2 can be further reduced through the voltage division of the first resistor R1 and the second resistor R2.
Preferably, referring to fig. 1, the power supply switching control circuit further includes a first capacitor C1; one end of the first capacitor C1 is electrically connected to the first resistor R1, the gate G of the first MOS transistor Q1, and the gate G of the second MOS transistor Q2, respectively, and the other end is grounded.
In another embodiment, referring to fig. 1, the power switching control circuit further includes a second capacitor C2; one end of the second capacitor C2 is electrically connected to the wired power supply and the anode of the diode D1, respectively, and the other end is grounded.
In yet another embodiment, referring to fig. 1, the power switching control circuit further includes a third capacitor C3; one end of the third capacitor C3 is electrically connected to the cathode of the diode D1, the drain D of the second MOS transistor Q2, and the load, and the other end is grounded.
Preferably, referring to fig. 1, the power switching control circuit further includes a fourth capacitor C4; one end of the fourth capacitor C4 is grounded with the cathode of the diode D1, the drain D of the second MOS transistor Q2, and the load, respectively.
In this embodiment, when the wired power supply is used to supply power to the load, the 5V wired power supply supplies power to the load through the anti-reverse diode D1, and meanwhile, through the voltage division between the first resistor R1 and the second resistor R2 (R2 > > R1), the voltage supplied to the gate of the first MOS transistor Q1 and the voltage supplied to the gate of the second MOS transistor Q2 are about 5V, because the maximum voltage of the battery power supply is about 6.5V, and the voltage of the source of the first MOS transistor Q1 and the voltage of the source of the second MOS transistor Q2 are less than 6.5V, the first MOS transistor Q1 and the second MOS transistor Q2 do not have the condition that Ugs is less than or equal to-1.5V, and no matter what the voltage difference between the host power supply (wired power supply) and the battery power supply is, when the wired power supply supplies power, the first MOS transistor Q1 and the second MOS transistor Q2 are in the cut off state, so that the power supply path of the battery power supply is cut off, and the service life of the battery power supply is not consumed.
And when the wired power supply is adopted, as the first MOS tube Q1 and the second MOS tube Q2 are in the cut-off state, the condition that a charging path is formed by the first MOS tube Q1 and the second MOS tube Q2 does not exist, and meanwhile, as the body diode of the first MOS tube Q1 is reversely connected, the body diode of the first MOS tube Q1 is cut off, so that the condition that the charging path is formed by the body diode of the first MOS tube Q1 and the body diode of the second MOS tube Q2 does not exist when the wired power supply is adopted, the anti-recoil function of the power supply switching control circuit can be realized, reverse charging of a battery power supply is avoided, the service life of the battery power supply is prolonged, and the foot controller is prevented from being damaged due to reverse charging.
When the wired power supply is disconnected, the grid electrode G of the first MOS tube Q1 is at a low level and the grid electrode G of the second MOS tube Q2 is at a low level through the second resistor R2, the battery power supply is conducted through the body diode of the first MOS tube Q1, so that the source electrode S of the first MOS tube Q1 is at a low level and the source electrode S of the second MOS tube Q2 is at a high level, the first MOS tube Q1 and the second MOS tube Q2 are in a conducting state, and the battery power supply supplies power to a load through the first MOS tube Q1 and the second MOS tube Q2.
The utility model also provides a medical instrument, which comprises a power supply switching control circuit and a pedal controller, wherein the specific structure of the power supply switching control circuit refers to the embodiment, and the pedal controller adopts all the technical schemes of all the embodiments, so that the medical instrument has all the beneficial effects brought by the technical schemes of the embodiments and is not repeated herein.
Referring to fig. 2, the medical apparatus 100 includes a foot controller 110, a host computer 120, and a surgical knife 130, wherein the foot controller 110 is respectively connected to a wired power source ZJ and a battery power source VBATF, that is, a power switching control circuit 111 of the foot controller 110 is respectively electrically connected to the wired power source ZJ and the battery power source VBATF, the surgical knife 130 is electrically connected to the host computer 120, and an operating state of the surgical knife 130 can be controlled by the foot controller 110. In this embodiment, the power supply modes adopted by the foot controller 110 include a wired power supply and a battery power supply, when the foot controller 110 adopts the wired power supply to supply power, the power supply path of the battery power supply VBATF is cut off, so that the energy of the battery power supply VBATF is not consumed, the anti-recoil function can be realized, the battery power supply VBATF is prevented from being reversely charged, the service life of the battery power supply VBATF is prolonged, and the foot controller 110 is prevented from being damaged due to reverse charging.
The medical apparatus 100 may be a radio frequency surgical device, a plasma surgical device, an ultrasonic surgical device, etc., and the corresponding surgical knife 130 may be a radio frequency surgical knife, a plasma surgical knife, an ultrasonic surgical knife, etc.
It should be noted that the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the embodiments, and when the technical solutions are contradictory or cannot be implemented, those skilled in the art should consider that the technical solutions are not combined, and are not within the scope of protection claimed by the present utility model.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.
Claims (10)
1. A power supply switching control circuit, characterized by comprising:
the grid electrode of the first MOS tube is electrically connected with a wired power supply, and the drain electrode of the first MOS tube is electrically connected with a battery power supply;
the grid electrode of the second MOS tube is electrically connected with the wired power supply, and the source electrode of the second MOS tube is electrically connected with the source electrode of the first MOS tube;
and the anode of the diode is electrically connected with the wired power supply, and the cathode of the diode is electrically connected with the drain electrode of the second MOS tube and the load respectively.
2. The power switching control circuit of claim 1, wherein the first MOS transistor and the second MOS transistor are PMOS transistors.
3. The power switching control circuit of claim 1, wherein the power switching control circuit further comprises a first resistor;
the wired power supply is electrically connected with the grid electrode of the first MOS tube and the grid electrode of the second MOS tube through the first resistor respectively.
4. The power switching control circuit of claim 3, wherein the power switching control circuit further comprises a second resistor;
one end of the second resistor is electrically connected with the first resistor, the grid electrode of the first MOS tube and the grid electrode of the second MOS tube respectively, and the other end of the second resistor is grounded.
5. The power switching control circuit of claim 3, wherein the power switching control circuit further comprises a first capacitor;
one end of the first capacitor is electrically connected with the first resistor, the grid electrode of the first MOS tube and the grid electrode of the second MOS tube respectively, and the other end of the first capacitor is grounded.
6. The power switching control circuit of claim 1, wherein the power switching control circuit further comprises a second capacitor;
one end of the second capacitor is electrically connected with the wired power supply and the anode of the diode respectively, and the other end of the second capacitor is grounded.
7. The power switching control circuit of claim 1, wherein the power switching control circuit further comprises a third capacitor;
one end of the third capacitor is electrically connected with the cathode of the diode, the drain electrode of the second MOS tube and the load respectively, and the other end of the third capacitor is grounded.
8. The power switching control circuit according to claim 7, wherein the power switching control circuit further comprises a fourth capacitor;
one end of the fourth capacitor is respectively grounded with the cathode of the diode, the drain electrode of the second MOS tube and the load, and the other end of the fourth capacitor is grounded.
9. The power switching control circuit according to any one of claims 1 to 8, wherein the load includes a foot controller of a medical instrument.
10. A medical device comprising the power switching control circuit of any one of claims 1 to 9 and a foot controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222569759.4U CN219980506U (en) | 2022-09-27 | 2022-09-27 | Power supply switching control circuit and medical instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222569759.4U CN219980506U (en) | 2022-09-27 | 2022-09-27 | Power supply switching control circuit and medical instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219980506U true CN219980506U (en) | 2023-11-07 |
Family
ID=88595363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222569759.4U Active CN219980506U (en) | 2022-09-27 | 2022-09-27 | Power supply switching control circuit and medical instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219980506U (en) |
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2022
- 2022-09-27 CN CN202222569759.4U patent/CN219980506U/en active Active
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