CN114558198A - Drive structure of drug infusion device - Google Patents
Drive structure of drug infusion device Download PDFInfo
- Publication number
- CN114558198A CN114558198A CN202011357646.7A CN202011357646A CN114558198A CN 114558198 A CN114558198 A CN 114558198A CN 202011357646 A CN202011357646 A CN 202011357646A CN 114558198 A CN114558198 A CN 114558198A
- Authority
- CN
- China
- Prior art keywords
- unit
- drive
- driving
- linear driver
- infusion device
- 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
- 238000001802 infusion Methods 0.000 title claims abstract description 52
- 239000003814 drug Substances 0.000 title claims abstract description 40
- 229940079593 drug Drugs 0.000 title claims abstract description 39
- 230000008859 change Effects 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 11
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 8
- 239000008280 blood Substances 0.000 description 7
- 210000004369 blood Anatomy 0.000 description 7
- 230000004044 response Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 102000004877 Insulin Human genes 0.000 description 4
- 108090001061 Insulin Proteins 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 229940125396 insulin Drugs 0.000 description 4
- 206010012601 diabetes mellitus Diseases 0.000 description 3
- 210000000496 pancreas Anatomy 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 102000051325 Glucagon Human genes 0.000 description 1
- 108060003199 Glucagon Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000016097 disease of metabolism Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- MASNOZXLGMXCHN-ZLPAWPGGSA-N glucagon Chemical compound C([C@@H](C(=O)N[C@H](C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(O)=O)C(C)C)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](C)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CO)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC=1C=CC(O)=CC=1)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CO)NC(=O)[C@H](CC=1C=CC(O)=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@@H](NC(=O)CNC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](N)CC=1NC=NC=1)[C@@H](C)O)[C@@H](C)O)C1=CC=CC=C1 MASNOZXLGMXCHN-ZLPAWPGGSA-N 0.000 description 1
- 229960004666 glucagon Drugs 0.000 description 1
- 208000030159 metabolic disease Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004203 pancreatic function Effects 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
-
- 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
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
Abstract
The invention discloses a driving structure of a drug infusion device, comprising: the driving unit moves in the driving direction to drive the driving wheel to rotate; the linear driver is electrically connected with the driving unit; a power supply for supplying power to the linear driver; the program unit and the first switch unit are electrically connected with each other to form a power supply circuit, when the linear driver is powered on, the driving unit drives, the driving unit can trigger a first signal representing that the driving direction terminal is reached, and the first signal controls the first switch unit to be disconnected so as to cut off power supply to the linear driver, so that power consumption of the infusion device is reduced.
Description
Technical Field
The invention mainly relates to the field of medical instruments, in particular to a driving structure of a drug infusion device.
Background
The pancreas in a normal human body can automatically monitor the glucose content in the blood of the human body and secrete the required insulin/glucagon automatically. The function of pancreas of diabetics is abnormal, and insulin required by human bodies cannot be normally secreted. Therefore, diabetes is a metabolic disease caused by abnormal pancreatic functions of a human body, and is a lifelong disease. At present, the medical technology can not cure the diabetes radically, and only can control the occurrence and the development of the diabetes and the complications thereof by stabilizing the blood sugar.
Diabetics need to test their blood glucose before injecting insulin into their body. At present, most detection means can continuously detect blood sugar and transmit blood sugar data to remote equipment in real time, so that a user can conveniently check the blood sugar data. The method needs the detection device to be attached to the surface of the skin, and the probe carried by the detection device is penetrated into subcutaneous tissue fluid to finish detection. According to the blood sugar value detected by the CGM, the infusion equipment inputs the currently required insulin subcutaneously so as to form a closed-loop or semi-closed-loop artificial pancreas.
However, the current driving structure of the drug infusion device has large power consumption, increases the requirement on the power supply, and has poor reliability.
Thus, there is a need in the art for a drug infusion device that consumes less power and is more reliable.
Disclosure of Invention
The embodiment of the invention discloses a driving structure of a drug infusion device, wherein the power supply to a linear driver is controlled by a program unit and a first switch unit, the power supply to the linear driver is cut off by the first switch unit, the response speed of the first switch unit is high, and the power consumption of the drug infusion device is reduced.
The invention discloses a driving structure of a drug infusion device, comprising: the driving unit moves in the driving direction to drive the driving wheel to rotate; the linear driver is electrically connected with the driving unit, and the electrified linear driver can pull the driving unit to move in the driving direction; a power supply for supplying power to the linear driver; the linear driver is electrically connected with the power supply, the program unit, the first switch unit and the linear driver to form a power supply circuit, when the linear driver is powered on, the driving unit drives, the driving unit can trigger a first signal representing that the terminal point of the driving direction is reached, and the first signal controls the first switch unit to be switched off so as to cut off the power supply to the linear driver.
According to one aspect of the invention, the drive unit comprises at least one drive part, on which gear teeth are arranged, which drive part pushes the gear teeth to drive the drive wheel.
According to an aspect of the invention, the movement pattern of the drive unit comprises a linear reciprocating movement or a rotary reciprocating movement.
According to one aspect of the invention, the linear driver further comprises an elastic member, the elastic member applies a return resilience to the driving unit, and the elastic member cooperates with the linear driver to reciprocate the driving unit.
According to one aspect of the invention, the device further comprises an electrical contact point for determining an end point of the movement of the drive unit in the driving direction, the drive unit being in contact with the electrical contact point for triggering a first signal, the first signal being an electrical signal.
According to an aspect of the present invention, the electrical contact is electrically connected to the first switching unit to form a connection circuit, and the electrical signal controls the first switching unit to be opened.
According to one aspect of the invention, the device further comprises a controller, the controller is respectively electrically connected with the first switch unit and the electric contact, and the electric signal is controlled by the controller to open the first switch unit.
According to one aspect of the invention, before and after the driving unit contacts with the electric contact point, the voltage of the electric contact point is different, and the electric signal is a voltage change signal.
According to one aspect of the invention, the program element is electrically connected to the electrical contacts for receiving an electrical signal.
According to one aspect of the invention, the program unit comprises a timer, the timer starts to time when the linear driver starts to be powered, the timer controls to disconnect the power supply circuit after the timer times a period of time T, and T is larger than or equal to T if the linear driver is T from the time when the linear driver starts to be powered to trigger the first signal.
According to one aspect of the invention, 0ms ≦ T-T ≦ 30 ms.
According to one aspect of the invention, the power supply circuit further comprises a second switch unit, the second switch unit is arranged on the power supply circuit, and the program unit is used for disconnecting the power supply circuit by controlling the second switch unit.
According to one aspect of the invention, the linear driver further comprises an electrical connection point, the electrical connection point is located on the power supply circuit between the linear driver and the first switch unit, the program unit is electrically connected with the electrical connection point to acquire a second signal of the electrical connection point, and the second signal is a voltage change signal.
According to an aspect of the invention, the apparatus further comprises a pressure sensor for determining an end point of the movement of the drive unit, and the first signal is a pressure change signal.
According to an aspect of the present invention, the first switching unit or the second switching unit includes a MOS field effect transistor, an analog switch, or a relay.
According to one aspect of the invention, the linear actuator is a shape memory alloy.
Compared with the prior art, the technical scheme of the invention has the following advantages:
in the driving structure of the drug infusion device, the program unit and the first switch unit are electrically connected, the power supply, the program unit, the first switch unit and the linear driver form a power supply circuit, when the linear driver is powered on, the driving unit drives, the driving unit can trigger a first signal representing that the end point of the driving direction is reached, and the first signal controls the first switch unit to be switched off so as to cut off the power supply to the linear driver. The response speed of the first switch unit is faster than that of the program unit. Compared with the program unit which controls the power on and power off of the linear driver at the same time, the first switch unit can cut off the power supply to the linear driver more quickly, shorten the time for which the linear driver is powered and reduce the power consumption of the infusion device. In addition, the time for the linear driver to be powered is shortened, the probability of fatigue fracture of the linear driver is reduced, the driving safety is improved, and the infusion reliability of an infusion device is improved.
Furthermore, the elastic component applies a return force to the driving unit, and the elastic component and the linear driver are matched with each other to enable the driving unit to reciprocate. The elastic component can enable the driving unit to reset automatically, electric energy does not need to be consumed, and power consumption of the infusion device is reduced.
Further, the program unit is electrically connected to the electrical contacts to receive the electrical signal. The program unit receives the electric signal and can be used for controlling and cutting off a power supply circuit for supplying power to the linear driver, the power-on and power-off times of the linear driver can be recorded, and the control process of the program unit is optimized.
Drawings
Fig. 1 is a schematic view showing a structural connection relationship of unit modules of a driving structure of a drug infusion device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a portion of a drive configuration according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a portion of a driving structure according to another embodiment of the present invention;
FIGS. 4 a-4 c are schematic diagrams of a control circuit for a driving structure according to an embodiment of the present invention;
FIGS. 5 a-5 c are schematic diagrams of control circuits for driving structures according to another embodiment of the present invention;
fig. 6 a-6 b are schematic diagrams of a control circuit of a driving structure according to another embodiment of the present invention.
Detailed Description
As previously mentioned, the power consumption in prior art infusion devices is large.
It has been found that the above problems are caused by the fact that the linear driver is completely controlled by the program unit when being powered on or powered off, and the linear driver is powered on for a long time and consumes a large amount of power because the program unit needs to respond for a long time.
In order to solve the problem, the invention provides a driving structure of a drug infusion device, wherein the power supply to a linear driver is controlled by a program unit and a first switch unit, the power supply to the linear driver is cut off by the first switch unit, the response speed of the first switch unit is high, and the power consumption of the drug infusion device is reduced.
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments should not be construed as limiting the scope of the present invention unless it is specifically stated otherwise.
Further, it should be understood that the dimensions of the various elements shown in the figures are not necessarily drawn to scale, for example, the thickness, width, length or distance of some elements may be exaggerated relative to other structures for ease of illustration.
The following description of the exemplary embodiment(s) is merely illustrative and is not intended to limit the invention, its application, or uses in any way. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail herein, but are intended to be part of the specification as applicable.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, further discussion thereof will not be required in the subsequent figure description.
Fig. 1 is a schematic structural connection diagram of unit modules of a driving structure of a drug infusion device according to an embodiment of the present invention.
The drug infusion device comprises an infusion needle, a drug storage unit, a piston arranged in the drug storage unit, a screw rod connected with the piston, a driving structure and the like. The screw rod can directly push the piston to advance to realize the medicine infusion.
The drive structure of the drug infusion device comprises a power supply, a program unit, a first switch unit, a linear driver, a drive unit and a drive wheel.
The power supply is used to supply power to the linear driver. The linear driver and the driving unit are electrically connected to each other. The power supply, the program unit, the first switch unit and the linear driver are electrically connected, and a power supply circuit for supplying power to the linear driver is further formed.
It should be noted that the connection sequence between the first switch unit and the program unit is not limited in the implementation of the present invention. Preferably, in the embodiment of the present invention, the program unit, the first switch unit and the linear driver are electrically connected in sequence. In another embodiment of the present invention, the first switching unit, the program unit and the linear driver are electrically connected in sequence.
The program unit is used for controlling some functional units of the infusion device to perform corresponding functions, such as but not limited to directly controlling the power supply circuit to be switched on or switched off to the linear driver, detecting the drug residual quantity, alarming and filling the infusion needle.
In one embodiment of the invention, the driving device further comprises a second switching unit. The second switch unit is arranged on the power supply circuit. The program unit controls the connection and disconnection of the power supply circuit by controlling the connection and disconnection of the second switch unit. Wherein the second switching unit operates in a similar manner to the first switching unit. The operating principle of the first switching unit is as follows.
In an embodiment of the invention, the first switching unit is adapted to cut off power supply to the linear drive such that the drive unit stops driving the drive wheel. The first switching unit or the second switching unit includes a MOS field effect transistor, an analog switch, or a relay. Preferably, in the embodiment of the present invention, the first switching unit is a MOS field effect transistor, and controls the channel to be turned on and off according to a change of a voltage applied to the gate, so as to connect and disconnect the power supply circuit. The second switch unit is an analog switch.
It should be noted here that "power supply to the linear driver is cut off" and "power supply circuit to the linear driver is cut off" have completely different meanings. "cutting off the power supply to the linear actuator" means directly causing the power supply to the linear actuator to be stopped, thereby stopping the application of the pulling force to the drive unit, e.g. the opening of the first switching unit directly causes the linear actuator to be stopped from being supplied with power. However, the "disconnection of the power supply circuit supplying power to the linear driver" merely means that the power supply circuit is disconnected, and does not necessarily directly result in the termination of power supply to the linear driver, and it is the power supply circuit that is disconnected as controlled by the program unit described below.
The linear driver is used for applying power to the driving unit to move the driving unit. After the linear driver is electrified, the physical form of the material of the linear driver is changed, the linear driver is contracted and deformed, and the driving force for driving the driving unit to rotate is output. The larger the current, the larger the amount of contraction deformation of the linear actuator, and the larger the driving force. Obviously, when the current is constant, the driving force output by the linear driver is constant. Thus, the linear driver is able to output a stable and controllable infusion driving force.
The linear driver is an electrically driven type linear driver or an electrically heated type linear driver. By alternately turning on and off, the linear drive outputs or stops outputting power. Preferably, in the practice of the present invention, the linear actuator is a shape memory alloy.
The driving unit can drive the driving wheel to rotate, and then drug infusion is achieved. In an embodiment of the present invention, the driving unit includes at least one driving portion (e.g. 151 in fig. 2), and the driving portion is provided with gear teeth, and the driving portion can push the gear teeth to drive the driving wheel to rotate, so as to drive the screw to advance. Preferably, in the embodiment of the present invention, the driving unit is provided with a driving part, the driving wheel is a ratchet wheel, and the gear teeth are ratchet wheel teeth. The ratchet teeth can be more easily pushed, improving the driving efficiency.
The movement pattern of the driving unit includes a linear reciprocating motion or a rotary reciprocating motion. Preferably, in the embodiment of the present invention, the driving unit performs a rotational reciprocating motion about a fixed rotation shaft. The drive structure further comprises an elastic member (170 in fig. 2) for applying a return resilience to the drive unit. When the driving unit moves towards the driving direction, the elastic component exerts continuously enhanced resilience force on the driving unit. The elastic component can enable the driving unit to reset automatically, electric energy does not need to be consumed, and power consumption of the infusion device is reduced. Preferably, the elastic member is a spring. The driving unit performs a rotary reciprocating motion under the mutual cooperation of the elastic component and the linear driver. And the drive unit moves in the drive direction to push the gear teeth, and moves in the reset direction to stop pushing the gear teeth. As will be described in detail below in connection with fig. 2.
In other embodiments of the present invention, the driving unit may further include two or more driving parts. Different driving parts can be matched with different driving wheels for driving. At this moment, the linear driver can pull the driving unit to respectively push the gear teeth in two directions of reciprocating rotation, so as to drive the driving wheel to rotate, and at this moment, an elastic component is not required to be arranged.
In other embodiments of the present invention, the driving unit may also be a gear and cooperate with the driving wheel, which is not limited herein.
Conventionally, the drive unit needs to stop moving after a certain stroke of movement. Therefore, in order to determine the end of the movement of the drive unit in the drive direction, the drive unit needs to trigger a first signal indicative of its reaching the end of the drive direction, which first signal is used to control the first switching unit to open in order to cut off the supply of power to the linear drive. As will be described in detail below.
Fig. 2 is a schematic partial structure diagram of a driving structure according to an embodiment of the present invention.
In the embodiment of the present invention, when the linear driver 180 is FPWhen the driving unit 150 is pulled, the driving unit 150 rotates counterclockwise around the rotating shaft 160 to push the gear teeth 141 to move forward, the driving wheel 140 rotates, and the screw 130 is driven to move toward DAThe direction is advanced. At this time, the elastic member 170 generates a gradually increasing elastic force FR. The drive structure is further provided with electrical contacts 171 for determining the end of the movement in the driving direction of the drive unit 150, the contact of the drive unit 150 with the electrical contacts 171 triggering an electrical signal. The electrical contact 171 is electrically connected directly to the first switching unit to form a connection circuit. When the driving unit 150 contacts the electrical contact point 171, the voltage level of the electrical contact point 171 changes. The voltage variation signal directly turns off the first switch unit, cuts off the power supply to the linear driver 180, the linear driver 180 stops providing power, and the driving unit 150 is under the elastic force FRIs rotated clockwise about the rotational axis 160.
Fig. 3 is a partial structural schematic diagram of a driving structure according to another embodiment of the present invention.
The linear driver 280 and the elastic member 270 respectively apply the power FP、FRActing on the driving unit 250 to make the driving unit 250 linearly reciprocate in the L direction, the driving unit 250 can push the gear teeth 241 in the driving direction to make the driving wheel 240 rotate in the W direction to realize the drug infusion.
Likewise, electrical contacts 271 are provided in the drive structure. When the driving unit 250 moves in the linear driving direction to contact the electrical contact point 271, the first switching unit is turned off to cut off the power supply to the linear driver 280, and the driving unit 250 stops moving and is reset by the elastic member 270. For the driving principle, please refer to the foregoing description, and further description is omitted here.
In a further embodiment of the invention, the pressure sensor is used for determining the end of the movement of the drive unit in the drive direction, whereby the first signal is a pressure change signal.
Similarly, in other embodiments of the present invention, the first electrical signal is not limited to the electrical signal or the pressure variation signal, but may be other signals known to those skilled in the art as long as the condition for determining the end point of the movement of the driving unit in the driving direction can be satisfied.
The circuit control principle of the driving structure will be explained below by taking the rotational reciprocating motion of the driving unit as an example. The elastic member is not shown in fig. 4 a-6 b.
Fig. 4 a-4 c are schematic diagrams of a driving structure control circuit according to an embodiment of the present invention.
As shown in fig. 4a, the electrical contact 3710 is electrically connected to the first switch unit 3200 to form a connection circuit. When the driving unit 3500 is not in contact with the electrical contact 3710, the driving unit 3500 is at a low voltage and the electrical contact 3710 is at a high voltage. When the infusion device needs the linear controller 3800 to work, the program unit 3100 and the first switch unit 3200 control power supplied from the power supply 3000 to the linear controller 3800, and the driving unit 3500 starts driving, that is, the driving unit 3500 moves in a driving direction (e.g., rotates in a counterclockwise direction).
As shown in FIG. 4b, when the driving unit 3500 contacts the electrical contact 3710, the voltage at the electrical contact 3710 changes, e.g., from high to low. The voltage variation signal can immediately control to turn off the first switching unit 3200. In an embodiment of the present invention, the program unit 3100 is also electrically connected to the electrical contacts 3710 for receiving the voltage variation signal, and can control to disconnect the power supply circuit supplying power to the linear controller 3800.
Obviously, the program unit 3100 and the first switch unit 3200 can receive the voltage variation signal at the same time, and both disconnect the power supply circuit supplying power to the linear controller 3800. However, conventionally, the response of the program unit 3100 requires time, and the speed of the response of the first switching unit 3200 is extremely fast, and therefore, the first switching unit 3200 cuts off the power supply to the linear controller 3800.
As shown in fig. 4c, when the driving unit 3500 leaves the electrical contact 3710 under the action of the elastic member, the electrical contact 3710 returns to the high voltage state again, and the first switch unit 3200 is closed again. Since the program unit 3100 controls to turn off the power supply circuit, the linear driver 3800 still cannot be powered and the driving unit 3500 resets the motion. When the next power supply starts, the program unit 3100 controls to close the power supply circuit and the linear driver 3800 is powered again.
Fig. 5 a-5 c are schematic diagrams of a driving structure control circuit according to another embodiment of the present invention.
The power supply 4000, the program unit 4100, the first switch unit 4200, and the linear driver 4800 are electrically connected to form a power supply circuit. The movement of the drive unit 4500 is the same as described above. As shown in fig. 5a, the electrical connection point a is located on the power supply circuit between the first switch unit 4200 and the linear driver 4800. The program unit 4100 is electrically connected to the electrical connection point a to obtain a second signal of the electrical connection point a. Preferably, the second signal is a voltage signal. Before the drive unit 4500 makes contact with the electrical contact 4710, electrical connection point a is at a low voltage.
As shown in fig. 5b, when the driving unit 4500 contacts the electrical contact 4710, a triggered first signal (e.g., a voltage signal) will open the first switching unit 4200, cutting off power to the linear driver 4800, and the electrical contact 4710 is in a low voltage state. Conventionally, since the linear actuator 4800 does not immediately withdraw or unload the pulling force after being de-energized (a certain time is required for the material to undergo a phase change), the driving unit 4500 will be in continuous contact with the electrical contact 4710 for a certain period of time. The voltage of the electric connection point a will coincide with the voltage of the electric contact point 4710, i.e., become a high voltage state. Therefore, before and after the first switching unit 4200 is turned off, the voltage at the electrical connection point a changes, and a second signal is generated and transmitted to the program unit 4100. Obviously, in the embodiment of the present invention, the second signal is a voltage variation signal.
As shown in fig. 5c, when the linear actuator 4800 releases the pulling force, the driving unit 4500 moves away from the electrical contact point 4710 by the elastic member, the electrical contact point 4710 returns to the high voltage state again, and the first switch unit 4200 is closed again. Since the program unit 4100 controls the power supply circuit to be cut off, the linear drive 4800 cannot be supplied with power, and the drive unit 4500 is moved to be reset. When power supply starts next time, the program unit 4100 controls to close the power supply circuit, and the linear drive 4800 is supplied with power again from the power supply 4000.
Fig. 6 a-6 b are schematic diagrams of a driving structure control circuit according to another embodiment of the present invention.
As shown in fig. 6a, in this embodiment, the program unit 5100 includes a timer 5101 for controlling the opening and closing of a power supply circuit supplying power to the linear driver 5800. After the timer 5101 counts a period of time T, the timer 5101 controls to disconnect the power supply circuit, and if the time taken by the linear driver 5800 from the beginning of power supply to the triggering of the first signal is T, T is more than or equal to T. In some embodiments of the present invention, 0ms ≦ T-T ≦ 30 ms. Preferably, T-T is 5 ms. In another embodiment of the present invention, T-T is 10 ms. In yet another embodiment of the present invention, T-T is 25 ms.
As shown in fig. 6b, when the driving unit 5500 contacts the electrical contact 5710, the triggered first signal opens the first switch unit 5200 and the linear driver 5800 is stopped from being powered by the power supply 5000. After the T-T time has elapsed, the timer 5101 controls to turn off the power supply circuit supplying power to the linear driver 5800.
As mentioned before, when the driving unit 5500 leaves the electrical contact 5710, the first switch unit 5200 is closed again, but the linear driver 5800 is not powered until the next driving is started because the timer 5101 controls to open the power supply circuit.
In an embodiment of the invention, the response speed of the first switching unit is faster than the program unit. Compared with the program unit which controls the power on and off of the linear driver at the same time, the first switch unit can cut off the power supply to the linear driver more quickly, shorten the time for which the linear driver is powered and reduce the power consumption of the infusion device. In addition, the power supply time of the linear driver is shortened, the fatigue fracture probability of the linear driver is reduced, the driving safety is improved, and the infusion reliability of an infusion device is improved.
Here, the first switching unit having a faster response speed than the program unit means that the first switching unit rapidly cuts off power supply to the linear driver after receiving the electric signal, thereby preventing the program unit from controlling a power supply circuit that cuts off power supply to the linear driver. Therefore, the first signal or the second signal detected by the program unit is not necessarily used for disconnecting the power supply circuit for supplying power to the linear drive, but may also be used for other purposes, such as recording the number of times the linear drive is supplied with power, and optimizing the control process of the program unit.
In summary, the present invention discloses a driving structure of a drug infusion device, wherein the power supply to the linear driver is controlled by the program unit and the first switch unit, and the power supply to the linear driver is cut off by the first switch unit, thereby improving the reliability of the drug infusion device.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (16)
1. A drive arrangement for a drug infusion device, comprising:
the driving unit moves in a driving direction to drive the driving wheel to rotate;
the linear driver is electrically connected with the driving unit, and the electrified linear driver can pull the driving unit to move in the driving direction;
a power supply for supplying power to the linear driver;
the power supply, the program unit, the first switch unit and the linear driver are electrically connected to form a power supply circuit for supplying power to the linear driver, when the linear driver is supplied with power, the drive unit drives, the drive unit can trigger a first signal representing that the end point of the driving direction is reached, and the first signal controls to disconnect the first switch unit so as to cut off the power supply to the linear driver.
2. A drive arrangement of a drug infusion device according to claim 1, characterised in that the drive unit comprises at least one drive part, on which drive wheel gear teeth are arranged, which drive part pushes the gear teeth to drive the drive wheel.
3. The drive structure of a drug infusion device according to claim 2, characterized in that the movement pattern of the drive unit comprises a linear reciprocating motion or a rotational reciprocating motion.
4. The drive structure of a drug infusion device according to claim 3, further comprising an elastic member applying a return spring force to the drive unit, the elastic member cooperating with the linear driver to reciprocate the drive unit in a drive direction and a return direction.
5. A drive structure of a drug infusion device according to claim 4, further comprising electrical contact points for determining an end point of the movement of the drive unit in the driving direction, the drive unit being in contact with the electrical contact points for triggering a first signal, the first signal being an electrical signal.
6. The drive structure of a drug infusion device according to claim 5, characterized in that the electrical contact is electrically connected with the first switch unit to form a connection circuit, and the electrical signal controls the first switch unit to open.
7. The driving structure of a drug infusion device according to claim 5, further comprising a controller electrically connected to the first switch unit and the electrical contacts, respectively, wherein the electrical signal controls the opening of the first switch unit through the controller.
8. The driving structure of a drug infusion device according to claim 6 or 7, wherein before and after the driving unit contacts the electrical contact points, the electrical contact points have different voltages, and the electrical signal is a voltage variation signal.
9. The drive arrangement of a drug infusion device according to claim 5, characterized in that the program unit is electrically connected with the electrical contacts for receiving the electrical signal.
10. The driving structure of a drug infusion device according to claim 9, wherein the program unit comprises a timer, the timer starts to count when the linear driver starts to be powered, the timer controls to disconnect the power supply circuit after the timer counts T time, and if the linear driver is T from the start of being powered to trigger the first signal, T ≧ T.
11. The drive structure of a drug infusion device according to claim 10, characterised in that T-T is 0ms ≦ T-T ≦ 30 ms.
12. The drive structure of the medication delivery device according to claim 10, characterized by further comprising a second switch unit provided on the power supply circuit, the program unit disconnecting the power supply circuit by controlling the second switch unit.
13. The drive arrangement of a drug infusion device according to claim 4, further comprising an electrical connection point located on the power supply circuit between the linear driver and the first switch unit, the program unit being electrically connected to the electrical connection point for obtaining a second signal of the electrical connection point, the second signal being a voltage change signal.
14. The drive arrangement of a drug infusion device according to claim 3, further comprising a pressure sensor for determining an end of movement of the drive unit, the first signal being a pressure change signal.
15. The drive structure of a drug infusion device according to claim 12, characterized in that the first switching unit or the second switching unit comprises a MOS field effect transistor, an analog switch or a relay.
16. The drive structure of a drug infusion device according to claim 1, characterized in that the linear actuator is a shape memory alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357646.7A CN114558198A (en) | 2020-11-27 | 2020-11-27 | Drive structure of drug infusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357646.7A CN114558198A (en) | 2020-11-27 | 2020-11-27 | Drive structure of drug infusion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114558198A true CN114558198A (en) | 2022-05-31 |
Family
ID=81711610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011357646.7A Pending CN114558198A (en) | 2020-11-27 | 2020-11-27 | Drive structure of drug infusion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114558198A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024011689A1 (en) * | 2022-07-14 | 2024-01-18 | 湖南千山医疗器械有限公司 | Drive reset insulin pump |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2857962Y (en) * | 2005-05-26 | 2007-01-17 | 胡凤龙 | Intelligent micro-injection device |
| US20070255198A1 (en) * | 2004-09-17 | 2007-11-01 | Psimedica Limited | Substance Delivery Device |
| US20080188796A1 (en) * | 1999-06-03 | 2008-08-07 | Medtronic Minimed, Inc. | Closed-Loop Method for Controlling Insulin Infusion |
| CN102364853A (en) * | 2011-10-21 | 2012-02-29 | 深圳和而泰智能控制股份有限公司 | Switch type resistance capacitance voltage reducing device and method |
| CN102387629A (en) * | 2010-09-06 | 2012-03-21 | 奥斯兰姆有限公司 | Luminous unit driving circuit and luminous device |
| CN104067439A (en) * | 2011-11-18 | 2014-09-24 | 赛诺菲-安万特德国有限公司 | Battery disconnection circuit |
| CN204304499U (en) * | 2014-11-26 | 2015-04-29 | 刘维洪 | A kind of battery quiescent current breaking circuit |
| CN107441587A (en) * | 2016-05-31 | 2017-12-08 | 上海微创生命科技有限公司 | Infusion pump |
| CN208937942U (en) * | 2018-08-10 | 2019-06-04 | 宁波米迪电器有限公司 | Time switching device and timing system |
| CN211352542U (en) * | 2020-07-10 | 2020-08-25 | 深圳市全智芯科技有限公司 | LED drive circuit, driver and lighting device |
| CN211405845U (en) * | 2020-03-26 | 2020-09-01 | 瀚昕微电子(上海)有限公司 | Flyback circuit and switching power supply system |
| CN111766503A (en) * | 2019-04-01 | 2020-10-13 | 宁德时代新能源科技股份有限公司 | Drive failure diagnosis circuit |
| CN111939371A (en) * | 2019-05-17 | 2020-11-17 | 上海移宇科技股份有限公司 | Miniature patch type intelligent control infusion device |
| CN111939387A (en) * | 2019-05-17 | 2020-11-17 | 上海移宇科技股份有限公司 | Drug infusion device with multiple infusion modes |
-
2020
- 2020-11-27 CN CN202011357646.7A patent/CN114558198A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080188796A1 (en) * | 1999-06-03 | 2008-08-07 | Medtronic Minimed, Inc. | Closed-Loop Method for Controlling Insulin Infusion |
| US20070255198A1 (en) * | 2004-09-17 | 2007-11-01 | Psimedica Limited | Substance Delivery Device |
| CN2857962Y (en) * | 2005-05-26 | 2007-01-17 | 胡凤龙 | Intelligent micro-injection device |
| CN102387629A (en) * | 2010-09-06 | 2012-03-21 | 奥斯兰姆有限公司 | Luminous unit driving circuit and luminous device |
| CN102364853A (en) * | 2011-10-21 | 2012-02-29 | 深圳和而泰智能控制股份有限公司 | Switch type resistance capacitance voltage reducing device and method |
| CN104067439A (en) * | 2011-11-18 | 2014-09-24 | 赛诺菲-安万特德国有限公司 | Battery disconnection circuit |
| CN204304499U (en) * | 2014-11-26 | 2015-04-29 | 刘维洪 | A kind of battery quiescent current breaking circuit |
| CN107441587A (en) * | 2016-05-31 | 2017-12-08 | 上海微创生命科技有限公司 | Infusion pump |
| CN208937942U (en) * | 2018-08-10 | 2019-06-04 | 宁波米迪电器有限公司 | Time switching device and timing system |
| CN111766503A (en) * | 2019-04-01 | 2020-10-13 | 宁德时代新能源科技股份有限公司 | Drive failure diagnosis circuit |
| CN111939371A (en) * | 2019-05-17 | 2020-11-17 | 上海移宇科技股份有限公司 | Miniature patch type intelligent control infusion device |
| CN111939387A (en) * | 2019-05-17 | 2020-11-17 | 上海移宇科技股份有限公司 | Drug infusion device with multiple infusion modes |
| CN211405845U (en) * | 2020-03-26 | 2020-09-01 | 瀚昕微电子(上海)有限公司 | Flyback circuit and switching power supply system |
| CN211352542U (en) * | 2020-07-10 | 2020-08-25 | 深圳市全智芯科技有限公司 | LED drive circuit, driver and lighting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024011689A1 (en) * | 2022-07-14 | 2024-01-18 | 湖南千山医疗器械有限公司 | Drive reset insulin pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113750319B (en) | Integrated closed-loop artificial pancreas with multiple infusion modes | |
| US20230011367A1 (en) | High reliability drug infusion device | |
| US5505697A (en) | Electrically powered jet injector | |
| EP3930793B1 (en) | Autoinjector with discharge detection | |
| KR100814493B1 (en) | Injection gun for mesotherapy | |
| CN113663157A (en) | Bilateral drive closed-loop artificial pancreas | |
| CN114558198A (en) | Drive structure of drug infusion device | |
| US20220313918A1 (en) | Rotary Motor Based Transdermal Injection Device | |
| CN113117179B (en) | Unilateral-driving patch type drug infusion device and control circuit thereof | |
| TW201113058A (en) | A glucagon pump controller | |
| US20230330333A1 (en) | Driving structure of a drug infusion device | |
| CN114558197A (en) | Drive structure of drug infusion device | |
| EP3603709A1 (en) | Liquid medicine administration device and operation method thereof | |
| US20230285664A1 (en) | Drug delivery device | |
| US11715391B2 (en) | Injection cartridge detection | |
| JPH0247961Y2 (en) | ||
| CN115779184A (en) | Interlocking type medicine infusion device | |
| KR20190070201A (en) | Self activated implantable drug supply device | |
| WO2019052111A1 (en) | Fluid infusion device and driving system therefor |
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 |