Blockage monitoring mechanism for application type insulin pump and application type insulin pump

Abstract

The utility model relates to the technical field of medical instruments, and discloses a blockage monitoring mechanism for an application type insulin pump and the application type insulin pump. A blocking monitoring mechanism for an application type insulin pump comprises a stepping motor, an encoder, a liquid medicine container, a plunger pump, a pressure sensor and a warning device, and the stepping motor drives the plunger pump to operate; the plunger pump comprises a push rod rotationally arranged on the liquid medicine container and a piston arranged in the liquid medicine container and arranged on the push rod, and the push rod rotates to drive the piston to move in the axial direction of the push rod so as to achieve pumping output of insulin; the encoder is arranged on the stepping motor, the pressure sensor is arranged at the end of the push rod, and the warning device is electrically connected with the encoder and the pressure sensor. Double monitoring is formed, the conveying state can be known more comprehensively, then the blockage risk is accurately warned, and the problem that an existing conveying system blockage warning structure is prone to misinformation of blockage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular, to an obstruction monitoring mechanism for a patch-type insulin pump. In addition, the utility model also relates to a patch-type insulin pump comprising the obstruction monitoring mechanism for the patch-type insulin pump. Background Art

[0002] The patch insulin pump is mainly used for insulin infusion management for diabetic patients. It adopts a catheter-free design, and has the advantages of small size, light weight, easy operation, safety and intelligence. These features of the patch insulin pump make it a powerful tool for diabetic patients to manage blood sugar and improve their quality of life.

[0003] Due to its small size, patch-type insulin pumps may have problems with delivery system obstruction during use. Obstruction usually refers to poor delivery of insulin due to various reasons (such as bubbles, insulin crystals, catheter blockage, etc.). Once obstruction occurs, patients need to replace consumables or dispose of the pump urgently; if obstruction is not discovered in time, the amount of insulin received by the patient may be less than the scheduled dose, affecting blood sugar control. Insufficient delivery will directly lead to increased blood sugar levels and increase the risk of diabetic complications.

[0004] In order to solve the problem of blocking of the patch-type insulin pump, such as the Chinese utility model patent CN217593509U, an insulin pump including a new blocking alarm structure is disclosed, in which one end of the patch-type pressure sensor switch is pasted on the back cover of the insulin pump, and the other end contacts the reducer housing trigger button. When the infusion line is blocked, the transmission screw will apply a unidirectional force to the insulin pump reducer under the reaction force of the reservoir. At this time, the reducer housing trigger button will produce a slight displacement to apply the reaction force to the patch switch to trigger the electrical signal, which is transmitted to the circuit board, thereby sounding an alarm. However, this method is often prone to false alarms, such as artificial contact with the patch-type insulin pump, micro-vibration caused by exercise, stepping loss, etc., so the patient needs to urgently replace consumables or handle the pump, or even the entire patch-type insulin pump, resulting in increased use costs. Utility Model Content

[0005] The utility model provides a blockage monitoring mechanism for a patch-type insulin pump and a patch-type insulin pump, wherein an encoder provides position feedback, ensures that the stepper motor rotates according to a predetermined number of steps and provides real-time feedback on the step loss situation, and a pressure sensor monitors the actual injection pressure, thereby forming a dual monitoring mechanism. This dual monitoring mechanism can provide a more comprehensive understanding of the delivery status, thereby accurately warning of the blockage risk, and the probability of false positive blockage is low. The combination of the stepper motor and the encoder and the arrangement of the pressure sensor provide a powerful monitoring and control mechanism for the patch-type insulin pump, which can effectively prevent and deal with the problem of blockage in the delivery of liquid medicine, ensure the safety and effectiveness of treatment, and solve the technical problem that the blockage alarm structure of the existing delivery system is prone to false positive blockage.

[0006] According to one aspect of the utility model, there is provided a blockage monitoring mechanism for a patch-type insulin pump, comprising a stepping motor, an encoder, a medicine liquid container, a plunger pump, a pressure sensor and a warning device, wherein the stepping motor drives the plunger pump to operate; the plunger pump comprises a push rod rotatably arranged in the medicine liquid container and a piston arranged in the medicine liquid container and on the push rod, wherein the push rod is rotated to drive the piston to move axially along the push rod to achieve the pumping output of insulin; the encoder is arranged on the stepping motor, the pressure sensor is arranged at the end of the push rod, and the warning device is electrically connected to the encoder and the pressure sensor respectively.

[0007] Furthermore, the warning device includes a signal conditioning device, a controller and a display which are electrically connected in sequence, and the signal conditioning device is electrically connected to the encoder and the pressure sensor respectively.

[0008] Furthermore, the controller has a signal transceiver module for remotely transmitting and receiving signals.

[0009] Furthermore, the warning device includes a buzzer electrically connected to the controller and / or a warning light electrically connected to the controller.

[0010] Furthermore, the encoder is arranged on the motor shaft of the stepping motor.

[0011] Furthermore, the power output end of the stepping motor is connected to the gear set, and the transmission output end of the gear set is connected to the push rod.

[0012] Furthermore, the medicine liquid container is a cylindrical structure, and the push rod is arranged at the central axis position of the medicine liquid container along the length direction of the medicine liquid container. One end of the push rod extends out of the medicine liquid container and is connected to the transmission output end of the gear set. The extended end of the push rod and the medicine liquid container are matched with a dynamic seal, and the radial periphery of the piston is sealed and fitted with the inner wall surface of the medicine liquid container.

[0013] Furthermore, a one-way valve for replenishing the medicine into the medicine container is provided at the bottom of the medicine container, and the one-way valve is arranged away from the stepping motor.

[0014] Furthermore, the output end of the drug liquid container is connected to a delivery tube, and the output end of the delivery tube is connected to the input end of the hose of the needle-assisting mechanism.

[0015] According to another aspect of the present invention, a patch-type insulin pump is provided, which includes the above-mentioned occlusion monitoring mechanism for the patch-type insulin pump.

[0016] The utility model has the following beneficial effects:

[0017] The utility model is used for the blocking monitoring mechanism of the patch-type insulin pump, and the stepper motor drives the plunger pump to operate so as to realize the pumping and output of the liquid medicine in the liquid medicine container. By setting an encoder on the stepper motor, the stepper motor moves according to a predetermined step angle after receiving a pulse signal, and the encoder is installed on the stepper motor for real-time monitoring of the rotation position and speed of the stepper motor, and by comparing the expected position with the position actually fed back by the encoder, it is known whether the stepper motor has moved the correct number of steps according to the instruction, and if the actual position does not match the expected position, that is, a step loss occurs, which may indicate that there is a blockage in the conveying path; optionally, when an incremental encoder is used, the rotation position of the motor shaft can be determined by recording the number of pulses through a counter, and when the reading of the counter does not match the expected position, a step loss is detected; optionally, when an absolute value encoder is used, the current position of the motor shaft can be directly read and compared with the expected position to detect the step loss. At the same time, pressure sensors are arranged at the supporting and force-bearing ends of the plunger pump's push rod. The pressure sensors directly monitor the pressure changes at the end of the push rod, and can provide real-time feedback on the injection force, ensuring that the drug solution is pushed into the hose or directly into the patient's body with appropriate force; by monitoring the pressure, excessive injection due to excessive thrust can be avoided, reducing drug waste and potential side effects; if the pressure rises abnormally, it may indicate that there is a blockage in the delivery path; by monitoring step loss and pressure, the delivery volume of the drug solution can be ensured to be accurate and safe, avoiding insufficient or excessive delivery due to blockage or step loss; step loss and pressure abnormalities can be used as a basis for fault diagnosis, helping to quickly locate problems and take measures, such as stopping delivery, alarming or automatically resynchronizing; recording step loss and pressure data can be used to analyze delivery efficiency, optimize equipment design and treatment strategies.

[0018] The encoder provides position feedback, ensuring that the stepper motor rotates according to the predetermined number of steps and providing real-time feedback on step loss. The pressure sensor monitors the actual injection pressure, forming a dual monitoring system that can provide a more comprehensive understanding of the delivery status, and then accurately warn of the risk of blockage, with a low chance of false positive blockage. The combination of the stepper motor and the encoder and the layout of the pressure sensor provide a powerful monitoring and control mechanism for the patch-type insulin pump, which can effectively prevent and deal with the problem of drug delivery blockage and ensure the safety and effectiveness of treatment.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0021] Figure 1 This is one of the structural schematic diagrams of the occlusion monitoring mechanism for a patch-type insulin pump according to a preferred embodiment of the utility model;

[0022] Figure 2 This is the second structural schematic diagram of the occlusion monitoring mechanism for a patch-type insulin pump according to the preferred embodiment of the utility model.

[0023] Legend:

[0024] 100, stepping motor; 200, encoder; 300, liquid medicine container; 400, plunger pump; 401, push rod; 402, piston; 500, gear set; 600, delivery tube; 700, needle-assisting mechanism. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0026] Figure 1 This is one of the structural schematic diagrams of the occlusion monitoring mechanism for a patch-type insulin pump according to a preferred embodiment of the utility model; Figure 2 This is the second structural schematic diagram of the occlusion monitoring mechanism for a patch-type insulin pump according to the preferred embodiment of the utility model.

[0027] like Figure 1 and Figure 2As shown, the blockage monitoring mechanism for the patch-type insulin pump of this embodiment includes a stepping motor 100, an encoder 200, a liquid medicine container 300, a plunger pump 400, a pressure sensor and a warning device. The stepping motor 100 drives the plunger pump 400 to operate; the plunger pump 400 includes a push rod 401 rotatably arranged on the liquid medicine container 300 and a piston 402 arranged in the liquid medicine container 300 and arranged on the push rod 401, and the push rod 401 is rotated to drive the piston 402 to move axially along the push rod 401 to achieve the pumping output of insulin; the encoder 200 is arranged on the stepping motor 100, the pressure sensor is arranged at the end of the push rod 401, and the warning device is electrically connected to the encoder 200 and the pressure sensor respectively. The utility model is used for the blockage monitoring mechanism of the patch-type insulin pump, and the stepping motor 100 drives the plunger pump 400 to operate to achieve the pumping output of the liquid medicine in the liquid medicine container 300. By setting an encoder 200 on the stepping motor 100, the stepping motor 100 moves according to a predetermined step angle after receiving a pulse signal. The encoder 200 is installed on the stepping motor 100 to monitor the rotation position and speed of the stepping motor 100 in real time. By comparing the expected position and the position actually fed back by the encoder 200, it is determined whether the stepping motor 100 has moved the correct number of steps according to the instruction. If the actual position does not match the expected position, that is, a step is lost, it may indicate that there is a blockage in the conveying path; optionally, when using an incremental encoder 200, the rotation position of the motor shaft can be determined by recording the number of pulses through a counter. When the counter reading does not match the expected position, a step is detected; optionally, when using an absolute encoder 200, the current position of the motor shaft can be directly read and compared with the expected position to detect a step loss. At the same time, a pressure sensor is arranged at the supporting and force-bearing end of the push rod 401 of the plunger pump 400. The pressure sensor directly monitors the pressure change at the end of the push rod 401, and can provide real-time feedback on the injection force to ensure that the drug solution is pushed into the hose or directly into the patient's body with appropriate force; by monitoring the pressure, excessive injection due to excessive thrust can be avoided, reducing drug waste and potential side effects; if the pressure rises abnormally, it may indicate that there is a blockage in the delivery path; by monitoring the step loss and pressure, the delivery amount of the drug solution can be ensured to be accurate and safe, avoiding insufficient or excessive delivery due to blockage or step loss; step loss and pressure abnormalities can be used as a basis for fault diagnosis, helping to quickly locate problems and take measures, such as stopping delivery, alarming or automatically resynchronizing; recording step loss and pressure data can be used to analyze delivery efficiency, optimize equipment design and treatment strategies.The encoder 200 provides position feedback, ensuring that the stepper motor 100 rotates according to the predetermined number of steps and providing real-time feedback on step loss, while the pressure sensor monitors the actual injection pressure, forming a dual monitoring. This dual monitoring can provide a more comprehensive understanding of the delivery status, and then accurately warn of the risk of blockage, with a low chance of false positive blockage. The combination of the stepper motor 100 and the encoder 200 and the layout of the pressure sensor provide a powerful monitoring and control mechanism for the patch-type insulin pump, which can effectively prevent and deal with the problem of drug delivery blockage and ensure the safety and effectiveness of treatment.

[0028] like Figure 1 and Figure 2 As shown, in this embodiment, the warning device includes a signal conditioning device, a controller and a display which are electrically connected in sequence, and the signal conditioning device is electrically connected to the encoder 200 and the pressure sensor respectively. The signal conditioning device is responsible for converting and conditioning (such as amplifying, filtering, analog-to-digital conversion, etc.) the original signals of the encoder 200 and the pressure sensor (for example, position pulse signals and analog pressure signals) into a format suitable for processing by the controller; optionally, for the encoder 200, the signal conditioning device includes a counter or a decoder to convert the pulse signal into position information; optionally, for the pressure sensor, the signal conditioning device includes an amplifier and an analog-to-digital converter (ADC) to convert the analog pressure signal into a digital signal; the controller receives the conditioned signal and performs further processing, such as calculating the step loss ratio, monitoring the pressure threshold, etc.; the display displays the data processed by the controller to the user in a graphical or digital form, so that the user can intuitively understand the monitoring status of the obstruction monitoring mechanism; it can monitor the position information fed back by the encoder 200 and the pressure data of the pressure sensor in real time to ensure the normal operation of the insulin pump; when the step loss or pressure abnormality is detected, the controller can activate the warning information or sound alarm on the display to remind the user; the electrical connection between the signal conditioning device, the controller and the display realizes the effective integration between different components and improves the collaborative working ability of the system; the clear display and timely warning improve the user's trust and satisfaction with the device.

[0029] like Figure 1 and Figure 2 As shown, in this embodiment, the controller has a signal transceiver module for remotely transmitting and receiving signals, allowing users or medical personnel to monitor the working status of the insulin pump at a remote location, including step loss and pressure readings.

[0030] like Figure 1 and Figure 2As shown, in this embodiment, the warning device includes a buzzer electrically connected to the controller and / or a warning light electrically connected to the controller. When the controller detects an abnormal situation (such as lost steps, abnormal pressure, etc.), the buzzer will sound a warning and the warning light will light up to immediately alert the user; the warning light can indicate different states or warning levels through different colors or flashing modes, providing intuitive feedback to the user; the warning device increases safety and ensures that the user can respond in time when potential problems occur to avoid treatment interruptions or errors; for users with hearing or vision impairments, the buzzer and warning light provide an effective auxiliary prompt method to ensure that they can also receive warning information in time; at night or in a quiet environment, the visual prompt of the warning light can serve as a supplement to the buzzer sound to ensure that the user will not miss any warnings; after hearing the buzzer or seeing the warning light, the user can take quick action, such as checking the equipment, suspending treatment, or contacting medical staff.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, the encoder 200 is arranged on the motor shaft of the stepper motor 100. The encoder 200 provides accurate information about the rotation angle of the motor shaft, and then tracks the exact angular position of the stepper motor 100 in real time; by monitoring the output of the encoder 200, it can be detected whether the stepper motor has lost steps, that is, whether the stepper motor rotates according to the expected number of steps; the encoder 200 can measure the rotation speed of the motor shaft, which is helpful to control and adjust the movement speed; the data of the encoder 200 can be fed back to the control system for closed-loop control to improve the overall control accuracy. Optionally, in addition to being arranged on the motor shaft of the stepper motor 100, the encoder 200 can also be arranged on the output shaft, coupling, and push rod 401 of the gear set 500.

[0032] like Figure 1 and Figure 2As shown, in this embodiment, the power output end of the stepping motor 100 is connected to the gear set 500 , and the transmission output end of the gear set 500 is connected to the push rod 401 . The power generated by the stepper motor 100 is transmitted to the push rod 401 through the gear set 500 to achieve force conversion and transmission; the gear set 500 can increase the torque output by the system through the deceleration effect of the gears, which is conducive to pushing heavier loads or overcoming greater resistance; the precise control characteristics of the stepper motor combined with the transmission ratio of the gear set 500 can achieve precise control of the position and speed of the push rod 401; the gear set 500 can be compactly integrated with the stepper motor 100 and the push rod 401 to save space and is suitable for application scenarios with limited size; the use of the gear set 500 improves the load-bearing capacity of the entire system and is suitable for occasions that need to withstand large torques; the gear set 500 can reduce the movement speed of the push rod 401 by deceleration, which is very useful in applications that require slow and fine control; the use of the gear set 500 can reduce the vibration caused by direct motor drive and improve the stability of the system; the gear set 500 can select a suitable reduction ratio according to different needs to adapt to different working conditions and performance requirements.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, the medicine liquid container 300 is a columnar structure, and the push rod 401 is arranged at the central axis position of the medicine liquid container 300 along the length direction of the medicine liquid container 300. One end of the push rod 401 extends out of the medicine liquid container 300 and is connected to the transmission output end of the gear set 500. The extended end of the push rod 401 and the medicine liquid container 300 are matched with a dynamic seal, and the radial periphery of the piston 402 is sealed and fitted with the inner wall surface of the medicine liquid container 300.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, a one-way valve for replenishing liquid medicine into the liquid medicine container 300 is provided at the bottom of the liquid medicine container 300, and the one-way valve is arranged away from the stepping motor 100. The liquid medicine can be replenished into the liquid medicine container 300 in a timely manner through the one-way valve as needed, so as to improve the service life of the entire patch-type insulin pump, and facilitate the miniaturization design of the patch-type insulin pump.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the output end of the drug liquid container 300 is connected to the delivery tube 600 , and the output end of the delivery tube 600 is connected to the input end of the hose of the needle-assisting mechanism 700 .

[0036] The patch-type insulin pump of this embodiment includes the above-mentioned occlusion monitoring mechanism for the patch-type insulin pump.

[0037] Matters not covered in this utility model are known technologies.

[0038] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

[0040] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An occlusion monitoring mechanism for a patch-type insulin pump, characterized in that: It comprises a stepping motor (100), an encoder (200), a liquid medicine container (300), a plunger pump (400), a pressure sensor and a warning device, wherein the stepping motor (100) drives the plunger pump (400) to operate; The plunger pump (400) comprises a push rod (401) rotatably arranged on the drug liquid container (300) and a piston (402) arranged in the drug liquid container (300) and arranged on the push rod (401), and the push rod (401) is rotated to drive the piston (402) to move axially along the push rod (401) to achieve the pumping output of insulin; The encoder (200) is arranged on the stepping motor (100), the pressure sensor is arranged on the end of the push rod (401), and the warning device is electrically connected to the encoder (200) and the pressure sensor respectively.

2. The occlusion monitoring mechanism for a patch-type insulin pump according to claim 1, characterized in that: The warning device comprises a signal conditioning device, a controller and a display which are electrically connected in sequence, and the signal conditioning device is electrically connected to the encoder (200) and the pressure sensor respectively.

3. The occlusion monitoring mechanism for a patch-type insulin pump according to claim 2, characterized in that: The controller has a signal transceiver module for remotely transmitting and receiving signals.

4. The occlusion monitoring mechanism for a patch-type insulin pump according to claim 2, characterized in that: The warning device includes a buzzer electrically connected to the controller and / or a warning light electrically connected to the controller.

5. The occlusion monitoring mechanism for a patch-type insulin pump according to any one of claims 1 to 4, characterized in that: The encoder (200) is arranged on the motor shaft of the stepping motor (100).

6. The occlusion monitoring mechanism for a patch-type insulin pump according to any one of claims 1 to 4, characterized in that: The power output end of the stepping motor (100) is connected to the gear set (500). The transmission output end of the gear set (500) is connected to the push rod (401).

7. The occlusion monitoring mechanism for a patch-type insulin pump according to claim 6, characterized in that: The liquid medicine container (300) is a columnar structure. The push rod (401) is arranged at the central axis of the medicine liquid container (300) along the length direction of the medicine liquid container (300), and one end of the push rod (401) extends out of the medicine liquid container (300) and is connected to the transmission output end of the gear set (500). The extended end of the push rod (401) is matched with the liquid medicine container (300) in a dynamic seal, and the radial periphery of the piston (402) is arranged in a sealing fit with the inner wall surface of the liquid medicine container (300).

8. The occlusion monitoring mechanism for a patch-type insulin pump according to any one of claims 1 to 4, characterized in that: A one-way valve for replenishing the liquid medicine in the liquid medicine container (300) is provided at the bottom of the liquid medicine container (300). The one-way valve is arranged away from the stepping motor (100).

9. The occlusion monitoring mechanism for a patch-type insulin pump according to any one of claims 1 to 4, characterized in that: The output end of the liquid medicine container (300) is connected to a delivery pipe (600). The output end of the delivery tube (600) is connected to the input end of the hose of the needle-assisting mechanism (700).

10. A patch-type insulin pump, characterized in that: An occlusion monitoring mechanism for a patch-type insulin pump comprising any one of claims 1 to 9.

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