CN117298380A - Electronic injection pen control circuit - Google Patents
Electronic injection pen control circuit Download PDFInfo
- Publication number
- CN117298380A CN117298380A CN202311435458.5A CN202311435458A CN117298380A CN 117298380 A CN117298380 A CN 117298380A CN 202311435458 A CN202311435458 A CN 202311435458A CN 117298380 A CN117298380 A CN 117298380A
- Authority
- CN
- China
- Prior art keywords
- resistor
- chip
- control circuit
- control
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31566—Means improving security or handling thereof
- A61M5/3157—Means providing feedback signals when administration is completed
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2026—Semi-automatic, e.g. user activated piston is assisted by additional source of energy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/50—General characteristics of the apparatus with microprocessors or computers
- A61M2205/502—User interfaces, e.g. screens or keyboards
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Sources (AREA)
Abstract
The invention relates to a control circuit of an electronic injection pen, which belongs to the technical field of electronic injectors and comprises a digital display unit, a driving unit, a power supply unit and a control unit; the power supply unit is respectively and electrically connected with the digital display unit, the driving unit and the control unit; the control unit is respectively and electrically connected with the driving unit and the digital display unit, responds to a button signal for injection operation output by a patient, outputs a first control signal to the driving unit and outputs a second control signal to the digital display unit, so that the digital display unit displays a prompt screen at a first set time, and the driving unit controls a motor of the electronic injection pen to work at a second set time.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of electronic injectors, and more particularly relates to a control circuit of an electronic injection pen.
Background
With the increasing importance of self-health, some patients with epidemic diseases such as diabetes can be treated by regular injection of corresponding drugs. Currently, existing electronic injection pens can mount a container containing a medicament to the electronic injection pen, which is configured with corresponding keys. After a patient presses a key, a motor of the electronic injection pen can push the medicine in the container to be injected into the patient, but the patient is difficult to check the injection process of the electronic injection pen, and the condition of successful injection possibly occurs, so that the experience of the patient is poor.
Disclosure of Invention
It is an object of embodiments of the present disclosure to provide a new solution for a control circuit of an electronic injection pen.
According to a first aspect of the present disclosure, there is provided a control circuit of an electronic injection pen, the control circuit including a digital display unit, a driving unit, a power supply unit, and a control unit;
the power supply unit is electrically connected with the digital display unit, the driving unit and the control unit respectively;
the control unit is respectively and electrically connected with the driving unit and the digital display unit, responds to a key signal for injection operation output by a patient, outputs a first control signal to the driving unit, and outputs a second control signal to the digital display unit, so that the digital display unit displays a prompt screen at a first set time, and the driving unit controls a motor of the electronic injection pen to work at a second set time.
Optionally, the power supply unit includes a power supply module and a charging module, the power supply module is electrically connected with the charging module, a first output end of the power supply module is electrically connected with the driving unit, a second output end and a third output end of the power supply module are respectively electrically connected with the digital display unit, and a first input end and a fourth output end of the power supply module are respectively electrically connected with the digital display unit;
the charging circuit of the charging module for charging the power supply model is at least partially multiplexed with the power supply circuit of the power supply module for discharging the first output end of the power supply module.
The control unit responds to a key signal of corresponding injection operation output by a patient and outputs a third control signal to the first input end of the power supply module, so that the second output end of the power supply module outputs a fourth control signal to the digital display unit, and the digital display unit responds to the fourth control signal and receives the second control signal output by the control unit.
Optionally, the charging module includes resistors R1-R7, a chip IC2, capacitors C1-C4, a transient suppression diode VD1, and a diode VD6;
the VDD terminal of the chip IC2 is connected to the cathode of the diode VD6, the anode of the diode VD6 is connected to the USB5V terminal of the control circuit, the transient suppression diode VD1 and the capacitor C1 are connected across the USB5V terminal and the GND terminal of the control circuit, the resistor R1 and the resistor R2 are connected in series, the other end of the resistor R1 is connected to the anode of the diode VD6, the other end of the resistor R2 is connected to the GND terminal and the ground terminal of the control circuit, the connection point of the resistor R1 and the resistor R2 is connected to the control unit, one end of the resistor R7 is connected to the PROG terminal of the chip IC2, the other end of the resistor R7 is connected to the ground terminal of the control circuit, the capacitor C2 and the capacitor C3 are connected across the VBAT terminal and the VSS terminal of the chip IC2, the VBAT terminal of the chip IC2 is connected to the power supply module, the connection point of the resistor R4 and the resistor R4 are connected to the control circuit, the connection point of the resistor R4 and the resistor R4 is connected to the other end of the resistor R4 is connected to the control circuit, the resistor R4 is connected to the resistor R5 and the other end of the resistor R4 is connected to the resistor R4.
Optionally, the power module includes resistors R9, R10, a transistor Q3, a switch Q4, capacitors C8-C10, C13, C42, C43, a transient suppression diode VD3, a fuse F1, a battery interface XS2, an inductance L4, and a chip IC3;
wherein one end of the battery interface XS2 is connected with a grounding end of the control circuit, the other end of the battery interface XS2 is connected with one end of the fuse F1, a connection point between the fuse F1 and one end of the transient suppression diode VD3 is used as a first output end of the power supply module, the other end of the transient suppression diode VD3 is connected with the grounding end of the control circuit, a connection point between the fuse F1 and one end of the transient suppression diode VD3 is connected with an IN end of the chip IC3, capacitors C9-C10 are all connected between an OUT end and a GND end of the chip IC3 IN a bridging manner, the GND end of the chip IC3 is connected with the grounding end of the control circuit, the OUT end of the chip IC3 is connected with a third output end serving as the power supply module, the OUT end of the chip IC3 is connected with one end of the inductor L4, the other end of the inductor L4 is used as a fourth output end of the power supply module, the capacitor C42 and the capacitor C3 are connected between the inductor L4 and the grounding end of the control power supply IN a bridging mode, the IN end of the chip IC3 is connected with a connecting point of the resistor R10 and the source electrode of the switch tube Q4, the connecting point of the grid electrode of the switch tube Q4 and the resistor R10 is connected with the collector electrode of the triode Q3, the emitting electrode of the triode Q3 is connected with the grounding end of the control circuit, the base electrode of the triode Q3 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the control unit, the connecting point of the drain electrode of the switch tube Q4 and one end of the capacitor C13 is connected with the digital display unit, and the other end of the capacitor C13 is connected with the grounding end of the control circuit.
Optionally, the control unit comprises a control chip IC1 and a key module, wherein the key module comprises switches SW1-SW5;
the control chip IC1 is electrically connected with the digital display unit, the driving unit and the power supply unit respectively, and the control chip IC1 is electrically connected with the switches SW1-SW5 respectively.
Optionally, the driving unit includes a chip IC5, a motor driving interface XS4, and a capacitor C7;
the chip IC5 is connected with the control unit, the chip IC5 is connected with the motor driving interface XS4, the VDD end of the chip IC5 is connected with the first output end of the power supply module, and the capacitor C7 is bridged between the VDD end of the chip IC5 and the grounding end of the control circuit.
Optionally, the control unit further comprises a drive detection module, wherein the drive detection module comprises a chip IC6, resistors R12-R14, and capacitors C11, C12 and C16;
the chip IC6 is connected between the control unit and the motor driving interface XS4, the VCC end of the chip IC6 is connected with the fourth output end of the power module, the 1A end of the chip IC6 is connected with one end of the capacitor C11 after being connected with the motor driving interface XS4, the other end of the capacitor C11 is connected with the ground end of the control power, the resistor R14 is connected between the control unit and the motor driving interface XS4, the capacitor C16 is connected between the resistor R14 and the ground end of the control circuit, the resistor R12 is connected between the motor driving interface XS4 and the resistor R14, the resistor R13 and the capacitor C12 which are connected in series are connected, the other end of the resistor R13 is connected with the resistor R12, and the other end of the capacitor C12 is connected with the ground end of the control circuit.
Optionally, the control circuit further includes a temperature detection module, where the temperature detection module includes resistors R24, R28, a transient suppression diode VD4, temperature detection interfaces XS3 and XS5, and a variable resistor RT1;
one end of the resistor R24 is connected with the control unit, the other end of the resistor R24 is connected with one end of the resistor R28, the other end of the resistor R28 is connected with a fourth output end of the power module, a connection point of the resistor R24 and the resistor R28 is connected with the 1 end of the temperature detection interface XS3, the transient suppression diode VD4 is bridged between the 1 end and the 2 end of the temperature detection interface XS3, the 2 end of the temperature detection interface XS3 is connected with the ground end of the control circuit, and the variable resistor RT1 is bridged between the 1 end and the 2 end of the temperature detection interface XS 5.
Optionally, the control circuit further comprises a speaker module, wherein the speaker module comprises resistors R16-18, a switching tube Q5 and a speaker Buz1;
one end of the resistor R16 is connected with the control unit, a connection point between the other end of the resistor R16 and one end of the resistor R17 is connected with a gate of the switch tube Q5, a connection point between a source of the switch tube Q5 and the other end of the resistor R17 is connected with a ground end of the control circuit, a drain of the switch tube Q5 is connected with the 1 end of the speaker Buz1, the 2 end of the speaker Buz1 is connected with one end of the resistor R18, and the other end of the resistor R18 is connected with a first output end of the power module.
Optionally, the digital display unit comprises a capacitor C45-C50, a resistor R9 and a digital display interface XS1;
the capacitors C48 and C49 are respectively connected with the digital display interface XS1, one ends of the capacitors C45-C47 and C50 and the resistor R9 are connected with the digital display interface XS1, the other ends of the capacitors C45-C47 and C50 and the resistor R9 are connected with the grounding end of the control circuit, and a connection point of the capacitor C50 and the digital display interface XS1 is connected with the third output end of the power supply module.
The embodiment of the disclosure has the beneficial effects that a patient can trigger a button of injection operation, the control unit receives a corresponding button signal, outputs a first control signal to the driving unit and outputs a second control signal to the digital display unit, so that the digital display unit can display a prompt picture at a first set time, the driving unit can control the motor of the electronic injection pen to work at a second set time, and then the condition of medicine injection can be displayed through the digital display unit under the condition that the motor works, thereby facilitating the patient to determine whether the injection is successful or not, and further improving the experience of the patient.
Other features of the disclosed embodiments and their advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the embodiments of the disclosure.
FIG. 1 is a schematic diagram of a control circuit of an electronic injection pen according to an embodiment of the present application;
fig. 2 is a circuit diagram of a control unit and a drive unit of an embodiment of the present application;
FIG. 3 is a circuit diagram of a charging module of an embodiment of the present application;
fig. 4 is a circuit diagram of a charging module of an embodiment of the present application;
FIG. 5 is a circuit diagram of a digital display unit according to an embodiment of the present application;
fig. 6 is a circuit diagram of a communication module and speaker module according to an embodiment of the present application;
fig. 7 is a circuit diagram of a control circuit of an electronic injection pen according to an embodiment of the present application.
Reference numerals illustrate:
1. a digital display unit; 2. a driving unit; 3. a power supply unit; 31. a power module; 32. a charging module; 4. a control unit; 41. a control chip IC1; 42. a key module; 43. a drive detection module; 44. a temperature detection module; 45. a speaker module; 46. a communication module; 47. and a clock module.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
A control circuit for an electronic injection pen is provided according to fig. 1 to 7.
As shown in fig. 1, the control circuit may include a digital display unit 1, a driving unit 2, a power supply unit 3, and a control unit 4.
The power supply unit 3 is electrically connected with the digital display unit 1, the driving unit 2 and the control unit 4 respectively;
the control unit 4 is electrically connected with the driving unit 2 and the digital display unit 1 respectively, the control unit 4 responds to a key signal for injection operation output by a patient, outputs a first control signal to the driving unit 2 and outputs a second control signal to the digital display unit 1, so that the digital display unit 1 displays a prompt screen at a first set time, and the driving unit 2 controls a motor of the electronic injection pen to work at a second set time.
The first setting time and the second setting time may be preset manually in the control unit 4. Further, the time period corresponding to the second set time is within the range of the time period corresponding to the first set time, that is, the prompting screen may be a screen sequentially playing the phases corresponding to the preparation for injection, the start of injection, the middle of injection and the end of injection, the playing time of all the phases is the first set time, and the second set time may be the time corresponding to the phase during injection. The time periods corresponding to the respective stages may be different or the same and may be manually set, which is not specifically described herein. It should be further noted that the control unit 4 outputs the first control signal to the driving unit 2, and the driving unit 2 can control the motor of the electronic injection pen to operate at the time corresponding to the injection, so that the medicine can be injected into the patient along with the operation of the motor. The way in which the motor drives the drug to be injected into the patient is known in the art and is not specifically described herein.
In other words, the patient can trigger the button of injection operation, the control unit 4 receives the corresponding button signal, outputs the first control signal to the driving unit 2 and outputs the second control signal to the digital display unit 1, so that the digital display unit 1 can display the prompt screen at the first setting time, the driving unit 2 can control the motor of the electronic injection pen to work at the second setting time, and then the condition of drug injection can be displayed through the digital display unit 1 under the condition that the motor works, so that the patient can conveniently determine whether the injection is successful, and the experience of the patient is improved.
In some embodiments, as shown in fig. 2, the control unit 4 includes a control chip IC141, where the uart_rx end of the control chip IC141 may be used as a data receiving end, and the uart_tx end may be used as a data transmitting end, so that an operator may set each program of the control chip IC 141. The DVSS terminal of the control chip IC141 is connected to the ground terminal of the control circuit.
In some embodiments, the control unit 4 further includes a clock module 47, where the clock module 47 includes an oscillator G1, capacitors C5, C6, resistors R20, R21, and a chip IC4, the capacitor C5 and the capacitor C6 are connected in series, one end of the capacitor C5 is connected to an OSCI terminal of the chip IC4, the other end of the capacitor C5 is connected to an OSCO terminal of the chip IC4, the oscillator G1 is connected across between the OSCO terminal and an ISCI terminal of the chip IC4, and a connection point between the capacitor C5 and the capacitor C6 is connected to a ground terminal of the control circuit. The chip IC4 may receive the first timing signal corresponding to the injection operation output by the control chip IC141 in the case where the control chip IC141 receives the key signal, the chip IC4 may start the timing operation, and the chip IC4 may output the corresponding signal to the control chip IC141 in the case where the above respective phases are reached, so that the control chip IC141 may determine that the corresponding phase is reached to control the driving unit 2 and/or the digital display unit 1 to operate.
In some embodiments, as shown in fig. 1 and 3, the power supply unit 3 includes a power module 31 and a charging module 32, the power module 31 is electrically connected to the charging module 32, a first output terminal (VBAT terminal) of the power module 31 is electrically connected to the driving unit 2, and a second output terminal (OLED ON/OFF terminal) and a third output terminal (VCC3.0V terminal) of the power module 31 are electrically connected to the digital display unit 1, respectively, and a first input terminal (VBAT terminal) and a fourth output terminal (VDD3.0V terminal) of the power module 31 are electrically connected.
Wherein, the charging circuit of the charging module 32 for charging the power model is at least partially multiplexed with the power supply circuit of the power module 31 for discharging to the first output terminal (VBAT terminal) of the power module 31.
Wherein, the control unit 4 outputs a third control signal to the first input end (VBAT end) of the power module 31 in response to the button signal of the corresponding injection operation output by the patient, so that the second output end (OLED ON/OFF end) of the power module 31 outputs a fourth control signal to the digital display unit 1, and the digital display unit 1 receives the second control signal output by the control unit 4 in response to the fourth control signal.
In other words, by multiplexing the charging line and the power supply line described above, the manufacturing cost of the control circuit can be effectively reduced.
In some embodiments, as shown in FIG. 3, the power module 31 includes resistors R9, R10, a transistor Q3, a switch Q4, capacitors C8-C10, C13, C42, C43, a transient suppression diode VD3, a fuse F1, a battery interface XS2, an inductance L4, and a chip IC3.
One end of the battery interface XS2 is connected to the ground terminal of the control circuit, the other end of the battery interface XS2 is connected to one end of the fuse F1, a connection point between the fuse F1 and one end of the transient suppression diode VD3 is used as a first output terminal (VBAT terminal) of the power module 31, the other end of the transient suppression diode VD3 is connected to the ground terminal of the control circuit, a connection point between the fuse F1 and one end of the transient suppression diode VD3 is connected to the IN terminal of the chip IC3, capacitors C9-C10 are all bridged between the OUT terminal and the GND terminal of the chip IC3, the GND terminal of the chip IC3 is connected to the ground terminal of the control circuit, the OUT terminal of the chip IC3 is connected to a third output terminal (VCC3.0V terminal) serving as the power module 31, the OUT terminal of the chip IC3 is connected to one end of the inductor L4, the other end of the inductor L4 is used as a fourth output terminal (VDD3.0V terminal) of the power module 31, a connection point between the capacitor C42 and the capacitor C3 and the ground terminal of the control power supply is bridged between the inductor L4, the connection point between the IN terminal of the chip IC3 and the resistor R10 and the switch Q4 is connected to the IN terminal of the Q4, the connection point between the Q terminal of the chip IC3 and the Q4 and the Q terminal of the Q3 is connected to the Q terminal of the Q3 and the Q terminal of the Q3, the Q terminal of the Q3 is connected to the Q terminal of the Q3 and the Q terminal of the Q3 is connected to the Q terminal of the Q3.
In other words, the control chip 41 may respond to the key signal for injection operation, the PD terminal of the control chip 41 may output a corresponding on signal to the transistor Q3, the gate of the switching transistor Q4 receives the corresponding on signal after the transistor Q3 is turned on, and the digital display unit 1 starts to operate after the switching transistor Q4 is turned on.
In some embodiments, the charging module 32 includes resistors R1-R7, chip IC2, capacitors C1-C4, transient suppression diode VD1, and diode VD6 as shown in FIG. 4.
The VDD terminal of the chip IC2 is connected to the cathode of the diode VD6, the anode of the diode VD6 is connected to the USB5V terminal of the control circuit, the transient suppression diode VD1 and the capacitor C1 are connected across the USB5V terminal and the GND terminal of the control circuit, the resistor R1 and the resistor R2 are connected in series, the other end of the resistor R1 is connected to the anode of the diode VD6, the other end of the resistor R2 is connected to the GND terminal and the ground terminal of the control circuit, the connection point of the resistor R1 and the resistor R2 is connected to the PA0 terminal of the control chip 41, one end of the resistor R7 is connected to the PROG terminal of the chip IC2, the other end of the resistor R7 is connected to the ground terminal of the control circuit, the capacitor C2 and the capacitor C3 are connected across the VBAT terminal and the VSS terminal of the chip IC2, the VBAT terminal of the chip IC2 is connected to the fuse F1 of the power module 31 and the transient suppression diode VSS terminal of the chip IC3, the other end of the resistor R3 and the resistor R4 are connected in series, the other end of the resistor R3 and the resistor R3 is connected to the ground terminal of the control circuit, the connection point of the resistor R3 and the resistor R4 is connected to the junction point of the chip IC2 and the resistor 6 is connected to the control circuit 6, the other end of the resistor 6 is connected to the resistor C4 is connected to the control circuit, the other end of the resistor 6 is connected to the resistor 6. Wherein, the GND end of the control circuit is connected with the negative end of the USB interface.
In other words, by providing the charging module 32, the direct current output by the usb5.V and GND terminals of the control circuit can be subjected to voltage reduction processing, so as to obtain direct currents with different voltage values required by each unit of the control circuit.
In some embodiments, as shown in fig. 2 and 6, the control unit 4 further includes an oscillator G2, capacitors C21-C26, capacitors C37-C40, and an inductor L1, the capacitor C21 is connected between the VDD1V terminal and the DVSS terminal of the control chip IC141, and a connection point between the capacitor C21 and the DVSS terminal of the control chip IC141 is connected to a ground terminal of the control circuit. The vdd_io terminal of the control chip IC141 is connected to the third output terminal (VCC3.0V terminal) of the power module 31, and the capacitor C22 and the capacitor C23 are connected across the ground terminal of the control circuit and the vdd_io terminal of the control chip IC 141. The internal voltage terminal (VDD 1V2 terminal) of the control chip IC141 is connected to the VCC 1V2 terminal of the control chip IC141, and the capacitor C24 and the capacitor C25 are connected across the VCC 1V2 terminal of the control chip IC141 and the ground terminal of the control circuit. The capacitor C26 is connected across the ground of the control circuit and the VDD_F terminal of the control chip IC 141. The oscillator G2 is connected between the XC1 end and the XC2 end of the control chip IC141 in a bridging manner, a capacitor C39 and a capacitor C40 are connected in series, the other end of the capacitor C39 is connected with the XC2 end of the control chip IC141, the other end of the capacitor C40 is connected with the XC1 end of the control chip IC141, and the connection point of the capacitor C39 and the capacitor C40 is connected with the ground end of the control circuit. The AVDD1V2 terminal of the control chip IC141 is connected to the internal voltage terminal (VDD 1V2 terminal) of the control chip IC141, and the capacitor C37 and the capacitor C38 are connected across the AVDD1V2 terminal of the control chip IC141 and the ground terminal of the control circuit.
In some embodiments, as shown in fig. 2, the driving unit 2 includes a chip IC5, a motor driving interface XS4, and a capacitor C7.
The IN1 end of the chip IC5 is connected with the PA3/IN1 end of the control chip IC, the IN2 end of the chip IC5 is connected with the PA4/IN2 end of the control chip IC, the IN3 end of the chip IC5 is connected with the PA5/IN3 end of the control chip IC, and the IN4 end of the chip IC5 is connected with the PA6/IN4 end of the control chip IC. The OUT1 end, the OUT2 end, the OUT3 end and the OUT4 end of the chip IC5 are respectively connected with different ports of the motor driving interface XS4, the VDD end of the chip IC5 is connected with the first output end (VBAT end) of the power module 31, and the capacitor C7 is bridged between the VDD end of the chip IC5 and the ground end of the control circuit.
In some embodiments, as shown in FIG. 2, the control unit 4 further includes a drive detection module 43, the drive detection module 43 including a chip IC6, resistors R12-R14, and capacitors C11, C12, and C16.
The 1Y end of the chip IC6 is connected with the PC7/INT1 end of the control chip IC, the 2Y end of the chip IC6 is connected with the PA2/INT0 end of the control chip, and the 1A end and the 2A end of the chip IC6 are respectively connected with different ports of the motor drive interface XS 4. The VCC terminal of the chip IC6 is connected to the fourth output terminal (VDD3.0V terminal) of the power module 31, the 1A terminal of the chip IC6 is connected to one terminal of the capacitor C11 after being connected to the motor drive interface XS4, the other terminal of the capacitor C11 is connected to the ground terminal of the control power, the resistor R14 is connected between the PC6 terminal of the control chip IC141 and one of the ports of the motor drive interface XS4, the capacitor C16 is connected between the resistor R14 and the ground terminal of the control circuit, the resistor R12 is connected between the motor drive interface XS4 and the resistor R14, the resistor R13 and the capacitor C12 are connected in series, the other terminal of the resistor R13 is connected to the resistor R12, and the other terminal of the capacitor C12 is connected to the ground terminal of the control circuit.
In other words, the motor drive interface XS4 is provided with ports for the detected operation values, i.e. the respective ports of the motor drive interface XS4 to which the chip IC6 is connected. The motor driving interface XS4 may be driven by the chip IC5, the motor driving interface XS4 may output an analog signal in a corresponding operation process to the chip IC6, the chip IC6 processes the analog signal and outputs the processed analog signal to the control chip IC141, and the control chip IC141 may determine an operation value of the rotation speed of the motor and the like by using a digital signal converted from the analog signal, thereby adjusting the first control signal output to the driving unit 2.
In some embodiments, as shown in FIG. 2, the control circuit further includes a temperature detection module 44, the temperature detection module 44 including resistors R24, R28, a transient suppression diode VD4, temperature detection interfaces XS3 and XS5, and a variable resistor RT1. One end of the resistor R24 is connected with the control unit 4, the other end of the resistor R24 is connected with one end of the resistor R28, the other end of the resistor R28 is connected with a fourth output end of the power module 31, a connection point of the resistor R24 and the resistor R28 is connected with the 1 end of the temperature detection interface XS3, the transient suppression diode VD4 is bridged between the 1 end and the 2 end of the temperature detection interface XS3, the 2 end of the temperature detection interface XS3 is connected with the ground end of the control circuit, and the variable resistor RT1 is bridged between the 1 end and the 2 end of the temperature detection interface XS 5.
In other words, the temperature detection interfaces XS3 and XS5 cooperate with each other to detect the temperature of the medicine and feed back the temperature to the control chip IC141, and the control chip IC141 may output the fifth control signal to the digital display unit 1 according to whether the temperature of the medicine is in the normal range, so that the digital display unit 1 may display a prompt screen of the medicine temperature in the normal range or not in the normal range to the patient, so as to improve the use experience of the patient.
In some embodiments, as shown in FIG. 5, the digital display unit 1 includes capacitors C45-C50, a resistor R9, and a digital display interface XS1.
The capacitors C48 and C49 are respectively connected with the digital display interface XS1, one ends of the capacitors C45-C47, C50 and the resistor R9 are connected with different ports of the digital display interface XS1, the other ends of the capacitors C45-C47, C50 and the resistor R9 are connected with the grounding end of the control circuit, and the connection point of the capacitor C50 and the digital display interface XS1 is connected with the third output end (VCC3.0V end) of the power module 31. The digital display interface XS1 is connected with different ends of the control chip C1, so that different functions such as different prompt pictures and picture reset can be displayed on a display screen connected with the digital display interface XS1.
In some embodiments, as shown in FIG. 6, the control circuit further includes a speaker module 45, the speaker module 45 including resistors R16-18, a switching tube Q5, and a speaker Buz1;
one end of the resistor R16 is connected to the control unit 4, a connection point between the other end of the resistor R16 and one end of the resistor R17 is connected to the gate of the switching tube Q5, a connection point between the source of the switching tube Q5 and the other end of the resistor R17 is connected to the ground end of the control circuit, the drain of the switching tube Q5 is connected to the 1 end of the speaker Buz1, the 2 end of the speaker Buz1 is connected to one end of the resistor R18, and the other end of the resistor R18 is connected to the first output end of the power module 31.
In other words, through the speaker module 45, the digital display unit 1 can cooperate with each other, so that the set prompt voice can be broadcasted in the injection process, and the experience of the user is further improved.
In some embodiments, as shown in fig. 4 and 6, the control circuit further includes a communication module 46, where the communication module 46 includes capacitors C32-C36, C41, inductors L2, L3, and an antenna X1, the capacitor C41 and the inductor L3 are connected in series, the other end of the capacitor C41 is connected to the ANT end of the control chip C1, the other end of the inductor L3 is connected to the connection point between the antenna X1 and the capacitor C36, and the other end of the capacitor C36 is connected to the ground end of the control circuit. The inductor L2 is connected between the ANT end and the VANT end of the control chip C1 in a bridging manner, the capacitor C32 is connected between the VANT end of the control chip C1 and the grounding end of the control circuit in a bridging manner, the capacitor C33 is connected between the connection point of the inductor L2 and the capacitor C41 and the grounding end of the control circuit in a bridging manner, the capacitor C34 is connected between the connection point of the capacitor C41 and the inductor L3 and the grounding end of the control circuit in a bridging manner, and the capacitor C35 is connected between the connection point of the inductor L3 and the capacitor C36 and the grounding end of the control circuit in a bridging manner.
In some embodiments, as shown in FIG. 2, the control unit 4 includes a key module 42, and the key module 42 includes switches SW1-SW5.
The PA1 end of the control chip IC141 is connected to one end of the switch SW1, and the other end of the switch SW1 is connected to the ground end of the control circuit. Under the condition that the trigger switch SW1 is closed, the signal at the PA1 end of the control chip IC141 is pulled low, then, the control chip may enter a power-on time sequence, the internal device of the control circuit starts to work, and the digital display unit 1 may display a corresponding power-on picture. Under the condition that the trigger switch SW1 is turned off, a signal at the PA1 end of the control chip IC141 is pulled high, then, the control chip may enter a shutdown timing sequence, the internal device of the control circuit starts to stop working, and the digital display unit 1 may display a corresponding shutdown picture. The PA4 terminal of the control chip IC141 is connected to the switch SW2, and the other terminal of the switch SW2 is connected to the ground terminal of the control circuit. Under the condition that the trigger switch SW2 is closed, the control chip can enter a setting mode, and a patient can touch corresponding keys through the digital display unit 1 to set the electronic injection pen, for example: a temperature threshold setting for the temperature detection module 44, and so on. The PA5 terminal of the control chip IC141 is connected to the switch SW3, and the other terminal of the switch SW3 is connected to the ground terminal of the control circuit. In the case where the trigger switch SW3 is closed, an injection operation according to the set injection metering can be entered, so that the control chip IC141 can control the digital display unit 1 and the driving unit 2. The PA6 terminal of the control chip IC141 is connected to the switch SW4, and the other terminal of the switch SW4 is connected to the ground terminal of the control circuit. In the case where the trigger switch SW4 is closed, an injection operation according to a set displacement may be entered so that the control chip IC141 may control the digital display unit 1 and the driving unit 2. The PA7 terminal of the control chip IC141 is connected to the switch SW5, and the other terminal of the switch SW5 is connected to the ground terminal of the control circuit. In the case where the trigger switch SW5 is closed, a reset operation may be entered so that the control chip IC141 may control the digital display unit 1 to display a prompt screen for the syringe to retract and control the driving unit 2 to control the motor to operate reversely.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.
Claims (10)
1. The control circuit of the electronic injection pen is characterized by comprising a digital display unit, a driving unit, a power supply unit and a control unit;
the power supply unit is electrically connected with the digital display unit, the driving unit and the control unit respectively;
the control unit is respectively and electrically connected with the driving unit and the digital display unit, responds to a key signal for injection operation output by a patient, outputs a first control signal to the driving unit, and outputs a second control signal to the digital display unit, so that the digital display unit displays a prompt screen at a first set time, and the driving unit controls a motor of the electronic injection pen to work at a second set time.
2. The control circuit of claim 1, wherein the power supply unit comprises a power supply module and a charging module, the power supply module is electrically connected with the charging module, a first output end of the power supply module is electrically connected with the driving unit, a second output end and a third output end of the power supply module are respectively electrically connected with the digital display unit, and a first input end and a fourth output end of the power supply module are respectively electrically connected with the digital display unit;
the charging circuit of the charging module for charging the power supply model is at least partially multiplexed with the power supply circuit of the power supply module for discharging the first output end of the power supply module.
The control unit responds to a key signal of corresponding injection operation output by a patient and outputs a third control signal to the first input end of the power supply module, so that the second output end of the power supply module outputs a fourth control signal to the digital display unit, and the digital display unit responds to the fourth control signal and receives the second control signal output by the control unit.
3. The control circuit of claim 2, wherein the charging module comprises resistors R1-R7, a chip IC2, capacitors C1-C4, a transient suppression diode VD1, and a diode VD6;
the VDD terminal of the chip IC2 is connected to the cathode of the diode VD6, the anode of the diode VD6 is connected to the USB5V terminal of the control circuit, the transient suppression diode VD1 and the capacitor C1 are connected across the USB5V terminal and the GND terminal of the control circuit, the resistor R1 and the resistor R2 are connected in series, the other end of the resistor R1 is connected to the anode of the diode VD6, the other end of the resistor R2 is connected to the GND terminal and the ground terminal of the control circuit, the connection point of the resistor R1 and the resistor R2 is connected to the control unit, one end of the resistor R7 is connected to the PROG terminal of the chip IC2, the other end of the resistor R7 is connected to the ground terminal of the control circuit, the capacitor C2 and the capacitor C3 are connected across the VBAT terminal and the VSS terminal of the chip IC2, the VBAT terminal of the chip IC2 is connected to the power supply module, the connection point of the resistor R4 and the resistor R4 are connected to the control circuit, the connection point of the resistor R4 and the resistor R4 is connected to the other end of the resistor R4 is connected to the control circuit, the resistor R4 is connected to the resistor R5 and the other end of the resistor R4 is connected to the resistor R4.
4. The control circuit of claim 2, wherein the power supply module comprises resistors R9, R10, transistor Q3, switch Q4, capacitors C8-C10, C13, C42, C43, transient suppression diode VD3, fuse F1, battery interface XS2, inductor L4, and chip IC3;
wherein one end of the battery interface XS2 is connected with a grounding end of the control circuit, the other end of the battery interface XS2 is connected with one end of the fuse F1, a connection point between the fuse F1 and one end of the transient suppression diode VD3 is used as a first output end of the power supply module, the other end of the transient suppression diode VD3 is connected with the grounding end of the control circuit, a connection point between the fuse F1 and one end of the transient suppression diode VD3 is connected with an IN end of the chip IC3, capacitors C9-C10 are all connected between an OUT end and a GND end of the chip IC3 IN a bridging manner, the GND end of the chip IC3 is connected with the grounding end of the control circuit, the OUT end of the chip IC3 is connected with a third output end serving as the power supply module, the OUT end of the chip IC3 is connected with one end of the inductor L4, the other end of the inductor L4 is used as a fourth output end of the power supply module, the capacitor C42 and the capacitor C3 are connected between the inductor L4 and the grounding end of the control power supply IN a bridging mode, the IN end of the chip IC3 is connected with a connecting point of the resistor R10 and the source electrode of the switch tube Q4, the connecting point of the grid electrode of the switch tube Q4 and the resistor R10 is connected with the collector electrode of the triode Q3, the emitting electrode of the triode Q3 is connected with the grounding end of the control circuit, the base electrode of the triode Q3 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the control unit, the connecting point of the drain electrode of the switch tube Q4 and one end of the capacitor C13 is connected with the digital display unit, and the other end of the capacitor C13 is connected with the grounding end of the control circuit.
5. The control circuit according to claim 2, wherein the control unit comprises a control chip IC1 and a key module comprising switches SW1-SW5;
the control chip IC1 is electrically connected with the digital display unit, the driving unit and the power supply unit respectively, and the control chip IC1 is electrically connected with the switches SW1-SW5 respectively.
6. The control circuit of claim 2, wherein the drive unit comprises a chip IC5, a motor drive interface XS4, a capacitor C7;
the chip IC5 is connected with the control unit, the chip IC5 is connected with the motor driving interface XS4, the VDD end of the chip IC5 is connected with the first output end of the power supply module, and the capacitor C7 is bridged between the VDD end of the chip IC5 and the grounding end of the control circuit.
7. The control circuit of claim 6, wherein the control unit further comprises a drive detection module comprising a chip IC6, resistors R12-R14, capacitors C11, C12, and C16;
the chip IC6 is connected between the control unit and the motor driving interface XS4, the VCC end of the chip IC6 is connected with the fourth output end of the power module, the 1A end of the chip IC6 is connected with one end of the capacitor C11 after being connected with the motor driving interface XS4, the other end of the capacitor C11 is connected with the ground end of the control power, the resistor R14 is connected between the control unit and the motor driving interface XS4, the capacitor C16 is connected between the resistor R14 and the ground end of the control circuit, the resistor R12 is connected between the motor driving interface XS4 and the resistor R14, the resistor R13 and the capacitor C12 which are connected in series are connected, the other end of the resistor R13 is connected with the resistor R12, and the other end of the capacitor C12 is connected with the ground end of the control circuit.
8. The control circuit of claim 2, further comprising a temperature detection module comprising resistors R24, R28, transient suppression diode VD4, temperature detection interfaces XS3 and XS5, and variable resistor RT1;
one end of the resistor R24 is connected with the control unit, the other end of the resistor R24 is connected with one end of the resistor R28, the other end of the resistor R28 is connected with a fourth output end of the power module, a connection point of the resistor R24 and the resistor R28 is connected with the 1 end of the temperature detection interface XS3, the transient suppression diode VD4 is bridged between the 1 end and the 2 end of the temperature detection interface XS3, the 2 end of the temperature detection interface XS3 is connected with the ground end of the control circuit, and the variable resistor RT1 is bridged between the 1 end and the 2 end of the temperature detection interface XS 5.
9. The control circuit of claim 2, further comprising a speaker module comprising a resistor R16-18, a switching tube Q5, and a speaker Buz1;
one end of the resistor R16 is connected with the control unit, a connection point between the other end of the resistor R16 and one end of the resistor R17 is connected with a gate of the switch tube Q5, a connection point between a source of the switch tube Q5 and the other end of the resistor R17 is connected with a ground end of the control circuit, a drain of the switch tube Q5 is connected with the 1 end of the speaker Buz1, the 2 end of the speaker Buz1 is connected with one end of the resistor R18, and the other end of the resistor R18 is connected with a first output end of the power module.
10. The control circuit according to claim 1, wherein the digital display unit comprises a capacitor C45-C50, a resistor R9 and a digital display interface XS1;
the capacitors C48 and C49 are respectively connected with the digital display interface XS1, one ends of the capacitors C45-C47 and C50 and the resistor R9 are connected with the digital display interface XS1, the other ends of the capacitors C45-C47 and C50 and the resistor R9 are connected with the grounding end of the control circuit, and a connection point of the capacitor C50 and the digital display interface XS1 is connected with the third output end of the power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311435458.5A CN117298380A (en) | 2023-10-31 | 2023-10-31 | Electronic injection pen control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311435458.5A CN117298380A (en) | 2023-10-31 | 2023-10-31 | Electronic injection pen control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117298380A true CN117298380A (en) | 2023-12-29 |
Family
ID=89242766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311435458.5A Pending CN117298380A (en) | 2023-10-31 | 2023-10-31 | Electronic injection pen control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117298380A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1481262A (en) * | 2000-12-22 | 2004-03-10 | DCA��ƹ�������˾ | Pen-type injector with electronic control unit |
| CN103208839A (en) * | 2013-03-29 | 2013-07-17 | 天津大学 | Lithium ion battery pack charger based on controller area network (CAN) bus and charging control method |
| CN105990879A (en) * | 2016-07-06 | 2016-10-05 | 歌尔股份有限公司 | Device for battery charging and electronic device |
| CN206711200U (en) * | 2017-04-13 | 2017-12-05 | 深圳怡化电脑股份有限公司 | A kind of failure detector and fault alarm safeguarded for ATM installations |
| CN107450600A (en) * | 2017-07-31 | 2017-12-08 | 京东方科技集团股份有限公司 | Display device and its system for regulating angle and method |
| CN108718110A (en) * | 2018-06-21 | 2018-10-30 | 贵州电网有限责任公司 | Information acquisition system and charging network transmission method suitable for power system device |
| CN110711294A (en) * | 2019-09-11 | 2020-01-21 | 杭州瀚科医疗科技有限公司 | Novel electronic pen type injector |
| CN112506094A (en) * | 2020-11-18 | 2021-03-16 | 深圳市海之景科技有限公司 | Temperature and humidity monitoring circuit for 5G communication module |
| CN114784923A (en) * | 2017-04-13 | 2022-07-22 | Oppo广东移动通信有限公司 | Device to be charged and charging method |
| CN221655437U (en) * | 2023-10-31 | 2024-09-06 | 江苏德尔福医疗器械有限公司 | Control circuit of electronic injection pen |
-
2023
- 2023-10-31 CN CN202311435458.5A patent/CN117298380A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1481262A (en) * | 2000-12-22 | 2004-03-10 | DCA��ƹ�������˾ | Pen-type injector with electronic control unit |
| CN103208839A (en) * | 2013-03-29 | 2013-07-17 | 天津大学 | Lithium ion battery pack charger based on controller area network (CAN) bus and charging control method |
| CN105990879A (en) * | 2016-07-06 | 2016-10-05 | 歌尔股份有限公司 | Device for battery charging and electronic device |
| CN206711200U (en) * | 2017-04-13 | 2017-12-05 | 深圳怡化电脑股份有限公司 | A kind of failure detector and fault alarm safeguarded for ATM installations |
| CN114784923A (en) * | 2017-04-13 | 2022-07-22 | Oppo广东移动通信有限公司 | Device to be charged and charging method |
| CN107450600A (en) * | 2017-07-31 | 2017-12-08 | 京东方科技集团股份有限公司 | Display device and its system for regulating angle and method |
| CN108718110A (en) * | 2018-06-21 | 2018-10-30 | 贵州电网有限责任公司 | Information acquisition system and charging network transmission method suitable for power system device |
| CN110711294A (en) * | 2019-09-11 | 2020-01-21 | 杭州瀚科医疗科技有限公司 | Novel electronic pen type injector |
| CN112506094A (en) * | 2020-11-18 | 2021-03-16 | 深圳市海之景科技有限公司 | Temperature and humidity monitoring circuit for 5G communication module |
| CN221655437U (en) * | 2023-10-31 | 2024-09-06 | 江苏德尔福医疗器械有限公司 | Control circuit of electronic injection pen |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103973287B (en) | On/off circuit | |
| CN221655437U (en) | Control circuit of electronic injection pen | |
| CN117298380A (en) | Electronic injection pen control circuit | |
| CN216699971U (en) | Key reset circuit and electronic equipment | |
| CN218958613U (en) | Low-power consumption power supply circuit, low-power consumption system and electronic equipment | |
| CN2757279Y (en) | A device for one-time programmable operation of a driver chip of a liquid crystal display module | |
| CN216751719U (en) | Multi-key awakening identification circuit and electronic equipment | |
| CN101488047A (en) | Keyboard with power on/off function | |
| CN105897240A (en) | Single-button soft on-off circuit with hardware forced power-off function | |
| CN221551213U (en) | Interface control circuit and electronic equipment | |
| CN210895397U (en) | Liquid crystal handwriting board driving chip, application circuit thereof and liquid crystal handwriting board | |
| CN216596892U (en) | Circuit for switching and displaying multiplexing and gas stove | |
| CN222509287U (en) | Switch button circuit | |
| CN218450072U (en) | Pulse signal generating circuit based on key and electronic product | |
| CN208805695U (en) | Terminal power-on control circuit and data acquisition terminal | |
| CN221010349U (en) | LED lamp circuit with display | |
| CN101175345A (en) | Boot flashing indicator circuit | |
| CN220274897U (en) | Atomizer control circuit with lock and electronic cigarette | |
| CN218213858U (en) | Stable input/output circuit | |
| CN211563412U (en) | Perfume spraying motor control circuit | |
| CN222896371U (en) | A low-cost quick switch circuit | |
| CN221174911U (en) | Power supply voltage detection circuit of electronic fan driver | |
| CN210404789U (en) | Power self-locking circuit and printer with same | |
| CN222484684U (en) | Starting self-locking circuit | |
| CN109327204A (en) | Pierce circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |