CN115920175A - Medical injection pump - Google Patents
Medical injection pump Download PDFInfo
- Publication number
- CN115920175A CN115920175A CN202310028700.0A CN202310028700A CN115920175A CN 115920175 A CN115920175 A CN 115920175A CN 202310028700 A CN202310028700 A CN 202310028700A CN 115920175 A CN115920175 A CN 115920175A
- Authority
- CN
- China
- Prior art keywords
- motor
- lead screw
- electromagnetic clutch
- box body
- groove
- 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
Images
Abstract
The invention discloses a medical injection pump, which comprises a box body, wherein the box body comprises a top surface used for sealing the top of the box body; a groove is arranged in the middle of the top surface of the box body; a long hollow groove is formed in the bottom of the groove, and the interior of a slider box body of the medical injection pump penetrates through the long hollow groove and moves linearly along the long hollow groove; a fixed seat for accommodating the syringe of the injector is arranged on the right side of the groove, and a clamping groove is arranged at the left end of the fixed seat and used for clamping the end part of the syringe; four lead screw lifters are arranged at four corners inside the box body, a motor is arranged in the middle of the inside of the box body, and an output shaft of the motor transmits power to the four lead screw lifters through a transfer case; when the motor rotates, the four screw rod lifters synchronously rotate to realize synchronous lifting or lowering. The medical injection pump has the characteristics of compact structure, small volume, high precision, high level and high safety.
Description
Technical Field
The invention relates to an injection pump, in particular to a medical injection pump.
Background
The medical injection pump has the advantages of stable injection and capability of eliminating pressure fluctuation during injection, thereby being widely applied to various medical injection occasions.
However, the existing medical syringe pumps also face a number of problems that need to be improved. If the medical injection pump is usually in a clamping type and clamped on the movable support, the clamping type medical injection pump cannot accurately ensure that the syringe needle cylinder is in a horizontal state, so that the injection speed is influenced by gravity when high-precision injection is required.
Meanwhile, the existing medical injection pump generally has no good method for solving the problems of unsmooth injection caused by the winding of an injection pipe channel when facing the blockage of an injector, and particularly, the blockage of the injection pipe easily causes the rise of injection pressure, has the risk of leakage of the injection and seriously harms the health of a patient.
There is a need for a medical injector that is highly precisely adjustable to meet the needs.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a medical injection pump, which specifically adopts the following technical scheme:
a medical syringe pump comprising a housing including a top surface for closing the top of the housing; a groove is arranged in the middle of the top surface of the box body, the groove is provided with a bottom plate which is sunken downwards from the top surface, and three left end side plates, an upper end side plate and a lower end side plate which extend downwards from the top surface, so that the groove with one end opened to the outer side of the box body is formed; the bottom of the groove is provided with a long hollow groove, the long hollow groove extends from the left end side plate to the right end of the groove, and the inside of a slider box body of the medical injection pump penetrates through the long hollow groove and moves linearly along the long hollow groove; a fixed seat for accommodating the syringe of the injector is arranged on the right side of the groove, and a clamping groove is arranged at the left end of the fixed seat and used for clamping the end part of the syringe; four lead screw lifters are arranged at four corners inside the box body, a motor is arranged in the middle of the inside of the box body, and an output shaft of the motor transmits power to the four lead screw lifters through a transfer case; the transfer case comprises an input shaft, an input bevel gear is fixed at the end part of the input shaft, the input bevel gear is respectively meshed with a first output bevel gear and a second output bevel gear which are arranged oppositely, the first output bevel gear transmits power to a first lead screw lifter through a first transfer case output shaft, the second output bevel gear transmits power to a second lead screw lifter through a second transfer case output shaft, the first transfer case output shaft and the second transfer case output shaft are both lead screws, the first lead screw lifter is connected to a third lead screw lifter through the lead screws, and the second rod lifter is connected to a fourth lead screw lifter through the lead screws; when the motor rotates, the four screw rod lifters synchronously rotate to realize synchronous lifting or lowering.
Furthermore, the fixed seat is provided with a semicircular groove matched with the shape of the syringe; the upper part of the fixed seat is also provided with a semicircular buckle which is used for firmly binding the needle cylinder on the fixed seat.
Furthermore, four lead screw lifters are respectively fixed at the middle positions of four corners inside the box body, each lead screw lifter is vertically provided with a lead screw lifting rod, one end of each lead screw lifting rod is connected with the corresponding lead screw lifter, and the other end of each lead screw lifting rod extends out of the box body through a through hole at the bottom of the box body; the bottom end of the screw rod lifting rod is provided with an anti-skid buffer pad; the length of the lead screw lifting rod enables the upper end of the lead screw lifting rod to be located below the top surface of the box body or penetrate through the top surface of the box body.
Furthermore, the motor is of a through shaft structure, the through shaft is provided with a front end shaft and a rear end shaft, the front end shaft is connected with a first electromagnetic clutch, and an output shaft of the first electromagnetic clutch is used as an input shaft of the transfer case; when the first electromagnetic clutch is engaged, the rotation of the motor will be transmitted to the input shaft of the transfer case, and when the electromagnetic clutch is disengaged, the rotation of the motor will not be transmitted to the transfer case.
Furthermore, a rear end shaft of the motor is used as a power input shaft of the dynamic torque sensor, a load access shaft of the dynamic torque sensor is connected with a second electromagnetic clutch, an output shaft of the second electromagnetic clutch is used as a driving screw rod, a screw rod part is arranged in the middle of the driving screw rod, and a sliding block on the screw rod part is driven to move back and forth; two ends of an output shaft of the second electromagnetic clutch are of polished rod structures and are respectively and rotatably supported on the first bearing and the second bearing, two through holes are respectively formed in the first bearing and the second bearing and used for fixing two parallel sliding rods, the two parallel sliding rods respectively penetrate through the sliding block, and therefore the sliding block moves back and forth along the direction of the sliding rod under the driving of the lead screw portion.
Further, the motor, the first clutch, the second electromagnetic clutch, the transfer case, the dynamic torque sensor and the sliding block are coaxially arranged, the motor, the first clutch, the second clutch and the dynamic torque sensor are all connected to the controller ECU, and the ECU controls the rotating speed of the motor and the connection or disconnection of the first clutch and the second clutch.
Further, when the height of the medical injection pump needs to be adjusted, an adjusting button is pressed, the ECU controls the motor to rotate, and meanwhile, the first electromagnetic clutch is switched on, and the second electromagnetic clutch is switched off; the power of the motor is transmitted to the four-linkage screw rod lifter through the first electromagnetic clutch and the transfer case, the lifting of the four-linkage screw rod lifter is synchronously and accurately adjusted, the adjusting button is pressed again after the height adjustment of the medical injection pump is completed, the first electromagnetic clutch is disconnected, and the motor stops rotating; when the propulsion system needs to work, the working button is pressed, the motor rotates at the moment, the first electromagnetic clutch is kept disconnected, the second electromagnetic clutch is connected, and the motor drives the screw rod to partially rotate to provide driving force for the sliding block.
Further, the dynamic torque sensor is used for measuring the torque change of the screw rod part; when the torque transmission of the screw part 22 is undesirably increased, the dynamic torque sensor sends a signal to the controller ECU, which determines whether its torque value exceeds a predetermined range based on the signal sent at 5, and if so, the ECU sends an off command to the second clutch, discontinuing the transmission to the screw part.
Further, the slider includes the drive division that is located the bottom, and the drive division passes through connecting portion and connects thrust portion, the drive division is including the screw hole that is located the center for partly cooperate with the lead screw, still including being located screw hole top both sides
The two through holes are used for the sliding rod to pass through, so that the function of guiding is achieved; the connecting part extends upwards from the inside of the box body 0 and passes through the long hollow groove, so that the driving part stands above the long hollow groove; the middle part of the driving part is provided with a telescopic contact part which is contacted with the end part of a piston push rod of the injector.
Also provided is an operating method of the medical injection pump, comprising the following steps:
In the invention, the injector and the sliding block are arranged in the middle groove of the injection pump box body, so that the installation space of the lifting mechanism can be obtained at four corners of the injection pump box body, and meanwhile, in the middle part of the box body, the part without the groove obtains higher installation space for arranging the motor and the transfer case.
The ECU sends an off command to the second clutch, discontinuing torque transfer to the lead screw portion. Therefore, the injector stops delivering the liquid medicine to the patient, and the effect of protecting the patient is achieved.
In the prior art, the injector is usually stopped by stopping the motor, but the motor has rotational inertia, so that the delivery of the injection liquid cannot be accurately stopped. The invention adopts a mode of interrupting the clutch, and can further reduce the impact of inertia.
The medical injection pump has the characteristics of high precision, high level and high safety, and has wide application space in the field of precision medicine injection.
Drawings
FIG. 1 is a schematic top view of a medical syringe pump of the present invention;
FIG. 2 is an enlarged, fragmentary schematic view of the medical syringe pump of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic diagram of the drive system of the medical infusion pump of the present invention;
FIG. 4 is a schematic view of the lift mechanism of the medical syringe pump of the present invention;
FIG. 5 is a front view of the slide of the medical syringe pump of the present invention;
fig. 6 is a side view and a partial cross-sectional view of the slide of the medical syringe pump of fig. 5 in accordance with the present invention.
Detailed Description
In order to more specifically describe the present invention, the following detailed description is provided for the technical solution of the present invention with reference to the accompanying drawings and the specific embodiments.
Referring to fig. 1-4, an embodiment of the medical syringe pump of the present invention will be described in detail. The medical injection pump comprises a box body 1, wherein the box body 1 can be of a cuboid structure integrally and comprises a top surface, and the top surface is used for sealing the top of the box body 1. Fig. 1 is a plan view of the case 1, and a groove 11 is provided in the middle of the case 1, the groove 11 having a bottom plate recessed downward from the top surface, and three side plates extending downward from the top surface, which are shown as a left end side plate, an upper end side plate, and a lower end side plate in fig. 1, thereby constituting the groove 11 having one end opened to the outside of the case 1. The bottom of the groove 11 is provided with a long hollow-out groove 12, the long hollow-out groove 12 extends from the left end side plate to the right end of the groove, the sliding block 2 of the injection pump penetrates through the long hollow-out groove 12 from the inside of the box body 1, and the sliding block 2 can move linearly along the long hollow-out groove 12. A fixed seat 15 is arranged at the right side of the groove 11, the fixed seat 15 protrudes from the groove 11, and preferably, the fixed seat 15 is provided with a semicircular groove matched with a syringe so as to accommodate the syringe. The left end of fixing base is provided with draw-in groove 13, and the right-hand member of fixing base 15 is open structure.
Referring to fig. 2, the injector of the present invention comprises a needle cylinder 33, the needle cylinder 33 is accommodated in the fixing seat 15, the end portion 32 of the needle cylinder 33 typically has a diameter larger than that of the needle cylinder 33, and the end portion 32 is snapped into the snap groove 13, so that the positioning of the needle cylinder 33 is completed. In a particular embodiment, a semicircular clip 14 is further provided above the fixed seat 15, and the clip 14 is used for firmly binding the syringe 33 to the fixed seat 15. The end 31 of the plunger rod of the syringe can be in contact with the thrust portion 21 of the slide 2 of the syringe pump. The pushing part 21 pushes the end part 31 to realize the pushing of the injector.
In the invention, the injector and the sliding block 2 are arranged in the groove at the middle part of the injection pump box body 1, so that the installation space of the lifting mechanism can be obtained at four corners of the injection pump box body 1, and meanwhile, in the middle part of the box body 1, the part without the groove 11 obtains higher installation space for arranging the motor 4 and the transfer case 7 of the invention.
Referring to FIG. 3, a schematic diagram of the powertrain of the present invention is shown. At the middle part position of the inside of box 1, be provided with motor 4, motor 4 fixes on the bottom plate of box 1, motor 4 is for penetrating the axle construction, it has front end axle 42 and rear end axle 41 to penetrate the axle, front end axle 42 is connected with first electromagnetic clutch 5, and first electromagnetic clutch 5's input shaft is front end axle 42, and electromagnetic clutch's output shaft 43 is connected with transfer case 7, and first electromagnetic clutch's output shaft 43 regards as transfer case 7's input shaft. When the electromagnetic clutch is engaged, the rotation of the motor 4 will be transmitted to the input shaft of the transfer case 7, and when the electromagnetic clutch 5 is disengaged, the rotation of the motor 4 will not be transmitted to the transfer case 7.
The transfer case 7 comprises an input shaft, an input bevel gear 44 is fixed at the end part of the input shaft, the input bevel gear 44 is respectively meshed with a first output bevel gear 72 and a second output bevel gear 71 which are opposite, the first output bevel gear 72 transmits power to a first lead screw lifter 76 through a first transfer case output shaft 73, the second output bevel gear 71 transmits power to a second lead screw lifter 75 through a second transfer case output shaft 74, the first transfer case output shaft 73 and the second transfer case output shaft 74 are both lead screws, thus, the output power of the motor 4 is transmitted to the first lead screw lifter 76 and the second lead screw lifter 75 through the transfer case 7 and the first transfer case output shaft 73 and the second transfer case output shaft 74, the first lead screw lifter 76 is connected to a third lead screw lifter 79 through a lead screw 77, and the second lead screw lifter 75 is connected to a fourth lead screw lifter 78 through a lead screw 791. The first to fourth lead screw lifters are respectively provided at four corners of the case 1, and when the motor 4 rotates, they are synchronously rotated to realize synchronous elevation or lowering.
Referring to fig. 4, a pair of exemplary lead screw elevators is shown, with a second lead screw elevator 75 connected to a fourth lead screw elevator 78 by a lead screw 791. A second lead screw lifter 75 and a fourth lead screw lifter 78 are arranged at the middle position in the box body 1 in the figure, and a fixing device is arranged in the box body to firmly fix the second lead screw lifter and the fourth lead screw lifter. First to fourth lead screw riser all is provided with lead screw lifter 8 perpendicularly, the one end of lead screw lifter 8 is connected with the lead screw riser, and the perforation of one end through box 1 bottom stretches out box 1, when motor 4 drive lead screw riser is rotatory, because it fixes on the box, consequently, when its lead screw 8 was driven rotatory, will stretch out box 1 or withdrawal box 1 has driven box 1 from this and has realized going up and down. Because the motor 4 synchronously drives the screw rod lifter to lift, the invention obtains good horizontal consistency, so that the injection in the needle cylinder is kept in a horizontal state without being influenced by gravity, and the injection is more accurate when being pushed.
In a particular embodiment, the bottom end of the screw 8 is provided with a non-slip cushion. The upper end of the screw rod 8 can not penetrate through the top surface of the box body 1, and can also penetrate through the top surface of the box body 1, namely the length of the screw rod 8 is controlled, and the adjustment of the lifting height of the box body 1 can be realized.
The four screw rod lifters are respectively arranged at the four corners of the box body 1, and the motor driving system is arranged in the middle of the box body 1, so that the size of the medical injection pump can be reduced. The motor drive system is arranged in the middle of the tank body, so that the tank body can be arranged in the form of a groove 11 in the middle of the top of the tank body parallel to the motor drive system, and the groove 11 is further arranged as a propelling part of the medical injection pump.
The rear end shaft 41 of the motor 4 is used as a power input shaft of the dynamic torque sensor 6, a load connecting shaft 52 of the dynamic torque sensor 6 is connected with a second electromagnetic clutch 51, an output shaft 53 of the second electromagnetic clutch 51 is used as a driving screw rod, a screw rod part 22 is arranged in the middle of the driving screw rod, and the sliding block 2 on the screw rod part 22 is driven to move back and forth. The two ends of the output shaft are of a polished rod structure and are respectively and rotatably supported on a first bearing 25 and a second bearing 23, two through holes are respectively formed in the first bearing 25 and the second bearing 23 and are used for fixing two parallel sliding rods 24, and the two parallel sliding rods 24 respectively penetrate through the sliding block 2, so that the sliding block 2 moves back and forth along the directions of the sliding rods under the driving of the lead screw part 22.
The motor 4, the first clutch 5, the second clutch 51, the transfer case 7, the dynamic torque sensor 6 and the sliding block 2 are coaxially arranged, the motor 4, the first clutch 5, the second clutch 51 and the dynamic torque sensor 6 are all connected to a controller ECU, and the ECU controls the rotating speed of the motor 4 and the connection or disconnection of the first clutch 5 and the second clutch 51.
When the height of the medical injection pump needs to be adjusted, the adjusting button is pressed, the ECU controls the motor 4 to rotate, and meanwhile, the first clutch 5 is switched on, and the second clutch 51 is switched off, so that the power of the motor 4 is not transmitted to a propulsion system. At the moment, the power of the motor 4 is transmitted to the four-linkage screw rod lifter through the first electromagnetic clutch 5 and the transfer case 7, the four-linkage screw rod lifter is synchronously and accurately regulated to lift, after the height adjustment of the medical injection pump is completed, the regulating button is pressed again, the first electromagnetic clutch 5 is disconnected, and the motor 4 stops rotating. When the propulsion system is required to work, the working button is pressed, the motor 4 rotates at the same time, the first electromagnetic clutch 5 is kept disconnected, the second electromagnetic clutch 51 is engaged, and the motor 4 drives the screw rod portion 22 to rotate to provide driving force to the slider 2.
The dynamic torque sensor 6 is used to measure the torque variation of the screw part 22. When the medical syringe pump is blocked due to winding, squeezing and the like of a syringe hose, for example, the thrust of the slide block 2 on the syringe piston is increased, the torque of the screw rod part 22 is increased at the same time, the torque increase is an unexpected increase, after the dynamic torque sensor 6 detects the torque increase, a signal is sent to the controller ECU, the ECU judges whether the torque value exceeds a preset range according to the sent signal, and if the torque value exceeds the preset range, the ECU sends a disconnection command to the second clutch 51 to stop transmitting the torque to the screw rod part 22. Therefore, the injector stops delivering the liquid medicine to the patient, and the effect of protecting the patient is achieved.
In the prior art, the injector is usually stopped by stopping the motor, but the motor has rotational inertia, so that the delivery of the injection liquid cannot be accurately stopped. The invention adopts a mode of interrupting the clutch, and can further reduce the impact of inertia.
In the invention, the through shaft type motor 4 is used for driving the lifting system and the propulsion system of the invention at the same time, and the space of the injection pump box body 1 is skillfully utilized, so that the injection pump is accurately adjusted and a compact installation space is obtained at the same time.
Referring to fig. 1,2,5, the sliding block 2 of the present invention comprises a driving portion 25 at the bottom, the driving portion 25 is connected to the thrust portion 21 through a connecting portion 26, the driving portion 25 comprises a threaded hole 28 at the center for matching with the screw rod portion 22, and two through holes 27 at two sides above the threaded hole 28, and the two through holes 27 are used for passing the sliding rod 24 to play a role of guiding. The connecting portion 26 extends upward from the inside of the case 1 through the elongated hollow 12, so that the driving portion 25 stands above the elongated hollow 12. The middle of the drive part 25 is provided with a contact part 29 which contacts the plunger rod end 31 of the syringe, and the pushing force of the slider 2 is applied to the syringe piston through the contact part 29. The contact portion 29 is provided with, for example, an anti-slip or friction-increasing arrangement.
Referring to fig. 6, in a preferred embodiment of the present invention, in order to further reduce the influence of the inertia of the slider 2 on the syringe after the second electromagnetic clutch 51 is turned off, the present invention further designs a thrust force stopping means. The thrust portion 21 of the slider 2 has a hollow cavity 210, and the hollow cavity 210 has an opening for disposing the contact portion 29, and the contact portion 29 can move in the opening to extend or retract the surface of the thrust portion 21. The electromagnetic valve 9 is arranged in the hollow cavity 210, the electromagnetic valve is fixed on the inner wall of the cavity 210 with the opposite openings, the electromagnetic valve is provided with a valve rod 91, one end of the valve rod 91 is fixedly connected with the contact part 29, the other end of the valve rod is fixed with an armature of the electromagnetic valve 9, when the electromagnetic valve 9 is electrified, the valve rod 91 extends out towards the outside of the opening, and therefore the contact part 29 is pushed to extend out of the surface of the thrust part 21, and the contact of the contact part and the end part 31 of the piston rod of the injector applies thrust to the surface. When the solenoid is de-energized, the valve stem 91 retracts in the direction of the opening under the action of the spring, thereby retracting the contact 29 in the direction of the cavity 210, breaking contact with the syringe plunger rod end 31. The solenoid valve 9 is connected to the controller ECU.
When the second electromagnetic clutch 51 is turned off, the controller ECU simultaneously controls the electromagnetic valve 9 to be turned off, so that the valve rod 91 is rapidly retracted, whereby the contact portion 29 is rapidly separated from the piston rod, whereby no inertial force is transmitted to the piston rod. With this configuration, the injection of the injection liquid can be stopped more accurately, and the separation from the plunger rod end 31 of the syringe can be completed almost at the moment when the second electromagnetic clutch 51 is turned off, and even if the slider still has inertia at this time, the gap between the contact portion 29 and the plunger rod end 31 is sufficient to satisfy the cushioning distance.
In one embodiment, the present invention also provides a method of operating a medical syringe pump, comprising the steps of:
And 5, setting the pushing speed and/or flow rate of the injector, starting a working button after the setting is finished, engaging the second electromagnetic clutch 51, moving the slider 2 towards the end 31 of the piston push rod of the injector under the driving of the motor, and pushing the piston rod to inject until the slider is contacted.
In a particular embodiment, in this step, the ECU controls the solenoid valve 9 to be energized, the valve stem 91 of the solenoid valve 9 pushes the contact portion 29 to protrude outward, and the application of the pushing force is realized by the contact of the contact portion 29 with the end of the piston rod.
And 6, if the injector hose is found to be blocked, pressing the emergency button, and controlling the second electromagnetic clutch 51 and the electromagnetic valve 9 to be disconnected by the ECU so as to stop the movement of the sliding block 2 and separate the sliding block from the piston rod of the injector.
In this step, the ECU receives the torque signal from the dynamic torque sensor 6 at any time, determines whether the torque value of the load connecting shaft 52 is within a predetermined range at the current pushing speed and/or flow rate, and if the torque 5 value is out of the predetermined range, the ECU starts an emergency operation to disconnect the second electromagnetic clutch 51 and the electromagnetic valve 9.
The data corresponding to the thrust speed and/or flow rate of the injector and the torque value of the load access shaft 52 are stored in advance in the ECU.
This data can be obtained experimentally.
The medical injection pump has the characteristics of high precision, high level and high safety, and has wide application space in the field of precision medicine injection.
0 although the present invention has been described in detail with reference to the related embodiments, it will be apparent to those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention.
Claims (10)
1. A medical infusion pump, characterized by comprising a tank body, wherein the tank body comprises a top surface for closing the top of the tank body; a groove is arranged in the middle of the top surface of the box body, the groove is provided with a bottom plate which is sunken downwards from the top surface, and three left end side plates, an upper end side plate and a lower end side plate which extend downwards from the top surface, so that the groove with one end opened to the outer side of the box body is formed; the bottom of the groove is provided with a long hollow groove, the long hollow groove extends from the left end side plate to the right end of the groove, and the inside of a slider box body of the medical injection pump penetrates through the long hollow groove and moves linearly along the long hollow groove; a fixed seat for accommodating the syringe of the injector is arranged on the right side of the groove, and a clamping groove is arranged at the left end of the fixed seat and used for clamping the end part of the syringe; four lead screw lifters are arranged at four corners inside the box body, a motor is arranged in the middle of the inside of the box body, and an output shaft of the motor transmits power to the four lead screw lifters through a transfer case; the transfer case comprises an input shaft, an input bevel gear is fixed at the end part of the input shaft, the input bevel gear is respectively meshed with a first output bevel gear and a second output bevel gear which are arranged oppositely, the first output bevel gear transmits power to a first lead screw lifter through a first transfer case output shaft, the second output bevel gear transmits power to a second lead screw lifter through a second transfer case output shaft, the first transfer case output shaft and the second transfer case output shaft are both lead screws, the first lead screw lifter is connected to a third lead screw lifter through the lead screws, and the second lead screw lifter is connected to a fourth lead screw lifter through the lead screws; when the motor rotates, the four screw rod lifters synchronously rotate to realize synchronous lifting or lowering.
2. The medical syringe pump as claimed in claim 1, wherein the holder is provided with a semicircular groove adapted to the shape of the syringe barrel; the upper part of the fixed seat is also provided with a semicircular buckle which is used for firmly binding the needle cylinder on the fixed seat.
3. The medical injection pump according to claim 2, wherein four lead screw lifters are respectively fixed at the middle positions of four corners inside the box body, each lead screw lifter is vertically provided with a lead screw lifting rod, one end of each lead screw lifting rod is connected with the lead screw lifter, and the other end of each lead screw lifting rod extends out of the box body through a through hole at the bottom of the box body; the bottom end of the screw rod lifting rod is provided with an anti-skid buffer pad; the length of the lead screw lifting rod enables the upper end of the lead screw lifting rod to be located below the top surface of the box body or penetrate through the top surface of the box body.
4. The medical injection pump according to any one of claims 1 to 3, wherein the motor is of a through shaft structure, the through shaft is provided with a front end shaft and a rear end shaft, the front end shaft is connected with a first electromagnetic clutch, and an output shaft of the first electromagnetic clutch is used as an input shaft of the transfer case; when the first electromagnetic clutch is engaged, the rotation of the motor will be transmitted to the input shaft of the transfer case, and when the electromagnetic clutch is disengaged, the rotation of the motor will not be transmitted to the transfer case.
5. The medical injection pump as claimed in claim 4, wherein the rear end shaft of the motor is used as a power input shaft of the dynamic torque sensor, a load connection shaft of the dynamic torque sensor is connected with a second electromagnetic clutch, an output shaft of the second electromagnetic clutch is used as a driving screw rod, a screw rod part is arranged in the middle of the output shaft, and a sliding block on the screw rod part is driven to move back and forth; two ends of an output shaft of the second electromagnetic clutch are of polished rod structures and are respectively and rotatably supported on the first bearing and the second bearing, two through holes are respectively formed in the first bearing and the second bearing and used for fixing two parallel sliding rods, the two parallel sliding rods respectively penetrate through the sliding block, and therefore the sliding block moves back and forth along the direction of the sliding rod under the driving of the lead screw portion.
6. The medical syringe pump of claim 5, wherein the motor, the first clutch, the second electromagnetic clutch, the transfer case, the dynamic torque sensor and the slider are coaxially arranged, the motor, the first clutch, the second clutch and the dynamic torque sensor are all connected to a controller ECU, and the ECU controls the rotation speed of the motor and the connection or disconnection of the first clutch and the second clutch.
7. The medical injection pump according to claim 6, wherein when the height of the medical injection pump needs to be adjusted, an adjusting button is pressed, the ECU controls the motor to rotate, and simultaneously, the first electromagnetic clutch is switched on, and the second electromagnetic clutch is switched off; the power of the motor is transmitted to the four-linkage screw rod lifter through the first electromagnetic clutch and the transfer case, the lifting of the four-linkage screw rod lifter is synchronously and accurately adjusted, the adjusting button is pressed again after the height adjustment of the medical injection pump is completed, the first electromagnetic clutch is disconnected, and the motor stops rotating; when the propulsion system needs to work, the working button is pressed, the motor rotates at the moment, the first electromagnetic clutch is kept disconnected, the second electromagnetic clutch is connected, and the motor drives the screw rod to partially rotate to provide driving force for the sliding block.
8. The medical syringe pump of claim 7, wherein the dynamic torque sensor is configured to measure a torque change of the lead screw portion; when the torque of the screw rod part is undesirably increased, the dynamic torque sensor sends a signal to the controller ECU, the ECU judges whether the torque value exceeds a preset range or not according to the sent signal, and if so, the ECU sends a disconnection command to the second clutch to stop the torque to the screw rod part.
9. The medical injection pump of claim 8, wherein the slide block comprises a driving part at the bottom, the driving part is connected with the thrust part through a connecting part, the driving part comprises a threaded hole at the center for matching with the screw rod part, and two through holes at two sides above the threaded hole for the slide rod to pass through for guiding; the connecting part extends upwards from the interior of the box body and passes through the long hollow groove, so that the driving part stands above the long hollow groove; the middle part of the driving part is provided with a telescopic contact part which is contacted with the end part of a piston push rod of the injector.
10. A method of operating a medical syringe pump as claimed in any one of claims 1 to 9, comprising the steps of:
step 1, moving the medical injection pump to a specified position, and powering on a power supply;
step 2, adjusting the height of the medical injection pump according to the requirement, pressing the adjusting button again after the height adjustment of the medical injection pump is completed, disconnecting the first electromagnetic clutch and stopping the rotation of the motor;
step 3, pressing down a working button, rotating the motor at the moment, keeping the first electromagnetic clutch disconnected, connecting the second electromagnetic clutch, driving the sliding block by the motor, moving the sliding block backwards, simultaneously carrying out self-checking, and then disconnecting the second electromagnetic clutch and stopping the sliding block from moving;
step 4, placing the needle cylinder of the injector into the fixed seat of the medical injection pump, and clamping the end part of the needle cylinder into the clamping groove on the fixed seat, so that the positioning of the needle cylinder is completed; buckling the semicircular buckles;
step 5, setting the pushing speed and/or flow rate of the injector, starting a working button, engaging a second electromagnetic clutch, and moving a sliding block towards the end part direction of a piston push rod of the injector under the driving of a motor to push the piston rod to inject;
step 6, if the abnormal blockage of the injector hose is found, pressing an emergency button, and controlling the second electromagnetic clutch and the electromagnetic valve to be disconnected by the ECU to realize the stopping movement of the sliding block and separate the sliding block from the piston rod of the injector; if there is no abnormality, the injection is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310028700.0A CN115920175A (en) | 2023-01-09 | 2023-01-09 | Medical injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310028700.0A CN115920175A (en) | 2023-01-09 | 2023-01-09 | Medical injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115920175A true CN115920175A (en) | 2023-04-07 |
Family
ID=86656123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310028700.0A Pending CN115920175A (en) | 2023-01-09 | 2023-01-09 | Medical injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115920175A (en) |
-
2023
- 2023-01-09 CN CN202310028700.0A patent/CN115920175A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7406851B2 (en) | Die cushion controlling apparatus and die cushion controlling method | |
| EP2460547A1 (en) | A device for drug infusion | |
| BR112018075483B1 (en) | DRUG ADMINISTRATION SYSTEM AND DRIVE ASSEMBLY | |
| JP5536868B2 (en) | Dual-use hydraulic electric jack | |
| CA2440018A1 (en) | Improvements in and relating to an injection device | |
| US9610400B2 (en) | Device for moving a piston inside a cartridge | |
| WO2004058327A3 (en) | Drug delivery apparatus | |
| JP2000084075A (en) | Monitoring method for monitoring pressure of medical fluid | |
| BR122022009351B1 (en) | DRUG DELIVERY SYSTEMS | |
| CA2820636A1 (en) | Medicine feeder | |
| CN115920175A (en) | Medical injection pump | |
| CN108653871B (en) | Injection pump | |
| KR101402751B1 (en) | Pitch Adjustment Type of Auxiliary Device for Injecting Drug | |
| EP2014323B1 (en) | Cartridge liquid injector | |
| CN217886682U (en) | Medicine injection execution system | |
| CN114624014A (en) | Syringe performance detection mechanism | |
| CN110123284B (en) | Skin flap capillary vessel reflux state monitoring device | |
| CN110840171B (en) | Exhibition stand with lifting and rotating functions | |
| CN216382007U (en) | Energy accumulator | |
| CN218931952U (en) | Supporting device for moving glass annealing furnace | |
| CN216769026U (en) | Cavity type grease quantifying system | |
| TWI702345B (en) | Preloaded structure of gravity-compensated linear drive device | |
| CN220324105U (en) | Display device | |
| CN108194694B (en) | Control device for precisely controlling displacement of movable rod | |
| KR101672616B1 (en) | Insulin pump driver installed in a small housing |
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 |