Fluid delivery device and blood glucose management system

Abstract

The fluid conveying equipment comprises a medicine storage device, a rotating sleeve, a ratchet wheel, a ratchet wheel transmission part and a power assembly, and a piston rod of the medicine storage device is sleeved with the rotating sleeve in a threaded connection mode; the ratchet wheel is mounted on the rotating sleeve in a circumferential limiting manner; the ratchet wheel transmission part is elastically clamped on the tooth surface of the ratchet wheel; the power assembly is in transmission connection with the ratchet transmission part; wherein the power assembly has a first working mode and a second working mode for continuous operation, and in the first working mode, the power assembly drives the ratchet wheel transmission part to perform first movement and is in linkage with the ratchet wheel to rotate by a first angle in the preset direction; in the second working mode, the power assembly drives the ratchet wheel transmission part to conduct second movement and is in linkage with the ratchet wheel to rotate by a second angle in the preset direction. In this way, the structure of the fluid conveying equipment can be simplified, the size is reduced, and the control precision and reliability of the fluid conveying equipment during working are improved.

Description

Technical Field

[0001] This invention belongs to the field of fluid transport technology, and in particular relates to a fluid transport device and a blood glucose management system. Background Technology

[0002] Fluid delivery devices can be used to deliver liquid medications to patients. For example, diabetic patients with insufficient or lost pancreatic function need to use fluid delivery devices to continuously infuse insulin subcutaneously to simulate pancreatic function and help them control their blood sugar levels and reduce the risk of diabetic complications.

[0003] Fluid delivery equipment includes a reservoir for storing liquid medication and a drive mechanism. The drive mechanism comprises multiple ratchet wheels. The rotation of the ratchet wheels drives a piston rod inside the reservoir to move linearly, discharging the medication from the reservoir to the patient. In this case, the installation of the ratchet wheels and their rotational space both affect the delivery accuracy and reliability. Summary of the Invention

[0004] In view of this, it is necessary to provide a fluid delivery device and a blood glucose management system for solving the above-mentioned technical problems.

[0005] A fluid delivery device, the fluid delivery device including a drug reservoir; the fluid delivery device comprising:

[0006] Rotate the sleeve and fit it onto the piston rod of the medicine reservoir via a threaded connection;

[0007] A ratchet is mounted on the rotating sleeve in a circumferentially limiting manner;

[0008] A ratchet drive component is elastically clamped onto the tooth surface of the ratchet;

[0009] The power assembly is connected to the ratchet drive component.

[0010] The power component has a first working mode and a second working mode for continuous operation. In the first working mode, the power component drives the ratchet transmission component to perform a first movement, thereby driving the ratchet to rotate a first angle along a preset direction. In the second working mode, the power component drives the ratchet transmission component to perform a second movement, thereby driving the ratchet to rotate a second angle along the preset direction.

[0011] It is understood that the power assembly provided in this application has a first working mode and a second working mode. In the first working mode, the power assembly drives the ratchet transmission component to perform a first movement to drive the ratchet to rotate a first angle. The rotation of the first angle corresponds to pushing the piston rod in the drug reservoir forward to expel the drug from the drug reservoir. In the second working mode, the power assembly drives the ratchet transmission component to perform a second movement to drive the ratchet to rotate a second angle. The rotation of the second angle corresponds to pushing the piston rod in the drug reservoir forward again to expel the drug from the drug reservoir. This continuous alternation of the first and second movements achieves continuous expulsion of the drug from the drug reservoir, realizing the drug infusion function. The fluid delivery device provided in this application is equipped with a ratchet transmission component that is elastically clamped on the tooth surface of the ratchet. The power assembly drives the ratchet transmission component to actuate the ratchet. This not only improves the layout and installation method of the ratchet transmission component and the ratchet, but also makes the ratchet actuation method more reliable, avoiding slippage during ratchet rotation and improving the safety of equipment use.

[0012] In one embodiment, the ratchet drive includes a first pawl and a second pawl, the first pawl and the second pawl being arranged opposite to each other and elastically clamped onto the tooth surface of the ratchet;

[0013] In the first working mode, the first movement includes rotating the ratchet along the preset direction by a first angle via the first pawl, and the second pawl sliding on the tooth surface of the ratchet to cooperate with the first pawl rotating the ratchet by the first angle; in the second working mode, the second movement includes rotating the ratchet along the preset direction by a second angle via the second pawl, and the first pawl sliding on the tooth surface of the ratchet to cooperate with the second pawl rotating the ratchet by the second angle.

[0014] It is understood that the ratchet drive component provided in this embodiment includes a first pawl and a second pawl. By utilizing the elastic clamping and transmission cooperation between the first pawl, the second pawl, and the ratchet, in the first working mode, the first pawl moves the ratchet to rotate by a first angle, while the second pawl simultaneously slides on the tooth surface into the next tooth groove to cooperate with the first pawl in moving the ratchet to rotate by the first angle. In the second working mode, the second pawl moves the ratchet to rotate by a second angle, while the first pawl simultaneously slides on the tooth surface into the next tooth groove to cooperate with the second pawl in moving the ratchet to rotate by the second angle. The continuous operation of the first and second working modes continuously drives the ratchet to rotate, thereby causing the piston rod in the drug reservoir to continuously squeeze out the drug, realizing the fluid infusion function.

[0015] In one embodiment, an included angle P is formed between the first pawl and the second pawl, and P ≥ 10°. It is understood that by setting the included angle P between the first pawl and the second pawl, it is ensured that the first pawl and the second pawl simultaneously and elastically clamp onto the two opposing tooth surfaces of the ratchet. In the first operating mode, the first pawl actuates the ratchet to rotate by a first angle, while the second pawl slides on the tooth surface into the next tooth groove to cooperate with the first pawl actuating the first angle. In the second operating mode, the second pawl actuates the ratchet to rotate by a second angle, while the first pawl slides on the tooth surface into the next tooth groove to cooperate with the second pawl actuating the second angle. This embodiment provides that the first pawl and the second pawl simultaneously and elastically clamp onto the opposing sides of the ratchet. In the first operating mode, the first pawl and the second pawl cooperate to achieve a first movement; in the second operating mode, the first pawl and the second pawl cooperate to achieve a second movement. The continuous first and second movements cause the ratchet to rotate.

[0016] In one embodiment, a first elastic element is connected between the first pawl and the second pawl. The first elastic element is used to provide elastic force to the first pawl and the second pawl so that the first pawl and the second pawl are elastically clamped on the tooth surface of the ratchet.

[0017] It is understandable that the first elastic element is used to ensure that the first pawl and the second pawl on the ratchet transmission can be simultaneously and elastically clamped on the tooth surface of the ratchet, so as to avoid problems such as slippage between the first pawl and the second pawl on the tooth surface during the driving process.

[0018] In one embodiment, the first pawl and / or the second pawl are configured as a resilient sheet structure.

[0019] It is understandable that the structural characteristics of the first and second pawls constructed using elastic sheets make it easier to drive the ratchet to rotate at a first angle through the first motion and drive the ratchet to rotate at a second angle through the second motion.

[0020] In one embodiment, the power assembly includes an electromagnet, a traction member, and a second elastic member, wherein a first end face of the traction member is fixedly connected to the ratchet transmission member, and a second end face abuts against the second elastic member;

[0021] In the first operating mode, the power component driving the ratchet drive to perform a first movement includes controlling the electromagnet to be energized to attract the traction member and pull the ratchet drive to perform the first movement, while simultaneously forcing the second elastic member to be compressed; in the second operating mode, the power component driving the ratchet drive to perform a second movement includes controlling the electromagnet to be de-energized and lose its attraction to the traction member, and the compressed second elastic member to return to its original state to push the traction member to drive the ratchet drive to perform the second movement.

[0022] In this embodiment, the movement of the traction member is achieved by controlling the on and off of the electromagnet, and at the same time, the compression or restoration of the second elastic member drives the ratchet drive member to perform the first or second movement, so as to make the ratchet rotate.

[0023] In one embodiment, the fluid delivery device further includes a base, on which the electromagnet, the traction member, and the second elastic member are respectively mounted;

[0024] The base has a limiting groove for accommodating the traction member, and the traction member moves in a restricted manner within the limiting groove.

[0025] It is understandable that the electromagnet, traction component, and second elastic component are respectively mounted on the base to achieve the overall structure of the fluid conveying equipment.

[0026] In one embodiment, the traction member is slidably installed in the limiting groove, and the number of the second elastic members is configured to be at least one. At least one of the second elastic members abuts against the second end face of the traction member. When the electromagnet is de-energized and separated from the traction member, the elastic force generated by the compressed second elastic member returning to its original state causes the traction member to move in a restricted manner, thereby causing the ratchet drive to perform a second movement.

[0027] In one embodiment, one end of the traction member is rotatably mounted on the base, and the other end is a free end, which swings within the limiting groove.

[0028] The second elastic element abuts against the free end of the traction element. When the electromagnet is de-energized and separated from the traction element, the elastic force generated by the compressed second elastic element returning to its original state causes the free end of the traction element to swing, thereby causing the ratchet drive to perform a second movement.

[0029] It is understandable that, through the above structural design, the traction component can drive the first or second movement of the ratchet transmission component while rotating on the base. Since the degree of freedom of rotation is smaller, this can further improve the working stability of the fluid conveying equipment.

[0030] This application also provides a blood glucose management system, including the fluid delivery device described above.

[0031] The fluid delivery device and blood glucose management system claimed in this application, by setting a first working mode and a second working mode for continuous operation, wherein in the first working mode, the power component drives the ratchet transmission component to perform a first movement, and in the second working mode, the power component drives the ratchet transmission component to perform a second movement, thereby driving the ratchet to rotate continuously through the first and second movements of the ratchet transmission component, thereby driving the piston rod in the drug reservoir to move, thus simplifying the main structure of the device. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a fluid conveying device provided in some embodiments of this application, wherein the traction member is slidably installed in the limiting groove of the base and attracted by an electromagnet.

[0034] Figure 2 for Figure 1 A sectional view.

[0035] Figure 3 This is a schematic diagram of the structure of a fluid conveying device provided in some embodiments of this application, wherein the traction member is slidably mounted on the base and reset under the push of the second elastic member.

[0036] Figure 4 for Figure 3 A sectional view.

[0037] Figure 5 This is a cross-sectional view of a fluid transport device provided in some embodiments of this application.

[0038] Figure 6 for Figure 5 Enlarged view of section A.

[0039] Figure 7 This is a cross-sectional view from another perspective of the fluid transport device provided in some embodiments of this application.

[0040] Figure 8 This is a top view of the circuit board, detection component, and conductive metal ring in this application when they are in contact with each other, wherein the conductive metal ring is assembled onto the ratchet via a sleeve.

[0041] Figure 9 This is a front view of the circuit board, detection component, and conductive metal ring in this application when they are in contact with each other, wherein the conductive metal ring is assembled onto the ratchet via a sleeve.

[0042] Figure 10 This is a left view of the circuit board, detection component, and conductive metal ring in this application when they are in contact with each other, wherein the conductive metal ring is assembled onto the ratchet via a sleeve.

[0043] Figure 11 This is a schematic diagram of the structure of a fluid conveying device provided in some embodiments of this application, wherein the traction member is rotatably mounted on the base and attracted by an electromagnet.

[0044] Figure 12 This is a schematic diagram of the structure of a fluid conveying device provided in some embodiments of this application, wherein the traction member is rotatably mounted on the base and reset under the push of the second elastic member.

[0045] Reference numerals: 100, fluid conveying equipment; 10, rotating sleeve; 11, medicine reservoir; 111, inner peripheral wall; 12, piston rod; 121, piston; 122, sealing ring; 20, ratchet; 201, third elastic element; 21, toothed surface; 211, ratchet tooth; 22, mounting sleeve; 221, stepped surface; 23, conductive metal ring; 231, ring body; 232, extending protrusion; 30, ratchet drive element; 301, first 302. Elastic component; 31. Fixing component; 32. First pawl; 33. Second pawl; 40. Connecting body; 41. Power component; 42. Electromagnet; 42. Traction component; 420. Free end; 421. First end face; 422. Second end face; 43. Second elastic component; 50. Circuit board; 51. Detection component; 511. Conductive component; 60. Base; 61. Limiting groove; 611. Groove wall; 70. Battery; 200. Liquid medicine. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] like Figures 1 to 4 , Figure 11 and Figure 12 As shown, the fluid conveying device 100 provided in this application includes a rotating sleeve 10, a ratchet 20, a ratchet drive component 30, and a power assembly 40. The rotating sleeve 10 is threadedly fitted onto the piston rod 12 of the drug reservoir 11. The ratchet 20 is mounted on the rotating sleeve 10 in a circumferentially limiting manner. The ratchet drive component 30 is elastically clamped onto the tooth surface 21 of the ratchet 20. The power assembly 40 is connected to the ratchet drive component 30 in a transmission manner. The power assembly 40 has a first working mode and a second working mode of continuous operation. In the first working mode, the power assembly 40 drives the ratchet drive component 30 to perform a first movement, which drives the ratchet 20 to rotate a first angle along a preset direction. In the second working mode, the power assembly 40 drives the ratchet drive component 30 to perform a second movement, which drives the ratchet 20 to rotate a second angle along a preset direction.

[0050] As can be seen from the above, when the fluid delivery device 100 of this application is working, the power component 40 has a first working mode and a second working mode that operate continuously. In the first working mode, the power component 40 drives the ratchet transmission component 30 to perform a first movement to drive the ratchet 20 to rotate a first angle. Rotating the first angle corresponds to pushing the piston rod 12 in the drug reservoir 11 forward to squeeze out the drug in the drug reservoir 11. In the second working mode, the power component 40 drives the ratchet transmission component 30 to perform a second movement to drive the ratchet 20 to rotate a second angle. Rotating the second angle corresponds to pushing the piston rod 12 in the drug reservoir 11 forward again to squeeze out the drug in the drug reservoir 11. In this way, the first movement and the second movement are executed alternately without interruption to continuously squeeze out the drug in the drug reservoir 11 and realize the drug infusion function. The fluid conveying device provided in this application has a ratchet drive component 30 that is elastically clamped on the tooth surface of the ratchet 20. The ratchet drive component 30 is driven by the power component 40 to move the ratchet 20. This not only improves the layout and installation method of the ratchet drive component 30 and the ratchet 20, but also makes the way the ratchet 20 is moved more reliable, avoids slippage during the rotation of the ratchet 20, and improves the safety of the device.

[0051] Furthermore, the fluid delivery device 100 is equipped with a power component 40 that drives the ratchet transmission component 30 to perform a first movement to rotate the ratchet 20 by a first angle, or drives the ratchet transmission component 30 to perform a second movement to rotate the ratchet 20 by a second angle. The rotation of the ratchet 20 by the first or second angle causes the threaded piston rod 12 to move, extruding the drug from the drug reservoir 11. By configuring the ratchet transmission component 30 to perform the first or second movement, the structure is more compact, not only simplifying the structure and reducing the size of the fluid delivery device 100, but also improving the control accuracy and reliability of the fluid delivery device 100 during operation.

[0052] It should be noted that when the power assembly 40 drives the ratchet transmission component 30 to perform a first movement, the ratchet 20 is driven to rotate in a preset direction by a first angle, specifically the angle corresponding to a ratchet tooth 211 on the tooth surface 21 of the ratchet 20. When the ratchet transmission component 30 performs a second movement under the drive of the power assembly 40, the ratchet 20 can rotate in a preset direction by a second angle, which is also the angle corresponding to a ratchet tooth 211 on the tooth surface 21 of the ratchet 20. In other words, the power assembly 40 drives the ratchet transmission component 30 to perform a first movement and a second movement, with the first movement corresponding to a first angle of rotation of the ratchet 20 and the second movement corresponding to a second angle of rotation of the ratchet 20. Compared to the prior art, which requires more space to move the ratchet by a pivoting pawl, this application drives the ratchet 20 to rotate by linear motion, resulting in a more compact structure. Moreover, the power assembly 40 drives the ratchet transmission component 30 to perform the first and second movements to drive the ratchet to rotate, ensuring driving accuracy and fluid delivery reliability.

[0053] like Figure 5 As shown, in some embodiments, a piston 121 is fixedly connected to one end of the piston rod 12 inside the medicine reservoir 11. The portion of the piston rod 12 extending out of the medicine reservoir 11 extends into the rotating sleeve 10 and is screwed into the rotating sleeve 10. When the rotating sleeve 10 rotates in a preset direction, the ratchet 20 alternately drives the rotating sleeve 10 to rotate at a first angle and a second angle through the threaded engagement structure between the piston rod 12 and the rotating sleeve 10, thereby causing the piston rod 12 to move forward. The piston rod 12 squeezes the liquid medicine 200 in the medicine reservoir 11 outward, so as to infuse the liquid medicine 200 in the medicine reservoir 11. In this embodiment, a sealing ring 122 is fitted on the piston 121, and the piston 121 and the inner peripheral wall 111 of the medicine reservoir 11 can be sealed by the compression-deformed sealing ring 122. It is understood that in other embodiments, the piston rod 12 may also be fitted onto the rotating sleeve 10 and screwed to the rotating sleeve 10 to achieve the purpose of rotational injection, which will not be elaborated here.

[0054] like Figure 5 , Figure 6As shown, in some embodiments, the ratchet 20 is mounted on the mounting sleeve 22, which is fitted onto the rotating sleeve 10 in a circumferentially limiting manner. That is, the ratchet 20 is assembled and connected to the rotating sleeve 10 via the mounting sleeve 22. Here, the mounting sleeve 22 can be connected to the rotating sleeve 10 via a keyway fit. The ratchet 20 can be designed to be integrally connected to the mounting sleeve 22, specifically, it can be integrally injection molded from plastic material.

[0055] like Figure 2 , Figure 4 As shown, the ratchet drive 30 includes a first pawl 31 and a second pawl 32, which are arranged opposite to each other and elastically clamped onto the tooth surface 21 of the ratchet 20. In a first operating mode, the first movement includes the first pawl 31 turning the ratchet 20 to rotate a first angle along a preset direction, and the second pawl 32 sliding on the tooth surface 21 of the ratchet 20 to cooperate with the first pawl 31 turning the ratchet 20 to rotate ... The first pawl 31 and / or the second pawl 32 are configured as elastic sheet structures. The structural characteristics of the first pawl 31 and the second pawl 32 constructed using elastic sheets make it easier to drive the ratchet 20 to rotate at a first angle through a first movement and to drive the ratchet 20 to rotate at a second angle through a second movement.

[0056] like Figure 2 , Figure 4As shown, in some embodiments, an included angle P is formed between the first pawl 31 and the second pawl 32, and P ≥ 10°. Preferably, 115° ≥ included angle P ≥ 90°. By setting the included angle between the first pawl 31 and the second pawl 32, it is ensured that the first pawl 31 and the second pawl 32 are simultaneously elastically clamped on the two opposing tooth surfaces of the ratchet 20. In the first working mode, the first pawl 31 moves the ratchet 20 to rotate by a first angle, while the second pawl 32 slides on the tooth surface of the ratchet 20 to the next tooth groove to cooperate with the first pawl 31 moving by the first angle. In the second working mode, the second pawl 32 moves the ratchet 20 to rotate by a second angle, while the first pawl 31 slides on the tooth surface of the ratchet 20 to the next tooth groove to cooperate with the second pawl 32 moving by the second angle. In this embodiment, the first pawl 31 and the second pawl 32 simultaneously and elastically clamp the opposite sides of the ratchet 20. In the first working mode, the first pawl 31 and the second pawl 32 cooperate to achieve the first movement. In the second working mode, the first pawl 31 and the second pawl 32 cooperate to achieve the second movement. The continuous first and second movements cause the ratchet 20 to rotate continuously, thereby realizing the outward flow of the drug in the drug reservoir 11.

[0057] like Figures 1 to 4 , Figure 11 and Figure 12 As shown, in some embodiments, the ratchet drive 30 further includes a connecting body 33, with the first pawl 31 and the second pawl 32 disposed at both ends of the connecting body 33 and connected to it respectively. In this embodiment, the first pawl 31, the connecting body 33, and the second pawl 32 are integrated. It can be understood that in other embodiments, the first pawl 31 and the second pawl 32 may also be configured as separate structures, respectively connected and fixed to the connecting body 33. The connecting body 33 then transmits power to the power component 40, avoiding power loss and ensuring that the power component drives the first pawl 31 and the second pawl 32 to cooperate in achieving the first and second movements. The specific structural forms of the connecting body 33 are diverse and will not be elaborated here.

[0058] like Figure 1 , Figure 3 , Figure 11 and Figure 12As shown, in some embodiments, a first elastic element 301 connects the first pawl 31 and the second pawl 32. The first elastic element 301 provides elastic force to the first pawl 31 and the second pawl 32, so that the first pawl 31 and the second pawl 32 are elastically clamped onto the tooth surface 21 of the ratchet 20. That is, by utilizing the elastic tension of the first elastic element 301, the first pawl 31 and the second pawl 32 on the ratchet drive 30 can be pressed tightly onto the tooth surface 21 of the ratchet 20, ensuring that in the first working mode or the second working mode, the first pawl 31 and the second pawl 32 can be simultaneously elastically clamped onto the ratchet 20, avoiding the problem of the first pawl 31 and the second pawl 32 slipping on the tooth surface 21 and failing to move the ratchet 20. Here, the first elastic element 301 uses a tension spring or similar device. It is understood that in other embodiments, the ratchet drive 30 can also be reset by utilizing the elasticity of the first pawl 31 and the second pawl 32. For this purpose, the ratchet drive 30 can be made of a highly elastic material, and the first elastic element 301 can be omitted.

[0059] It should be noted that in the first working mode, the power component 40 pushes the first pawl 31 to rotate the ratchet by a first angle through the connecting body 33. The second pawl 32 on the ratchet transmission component 30 will slide on the tooth surface 21 of the ratchet 20. During this process, the ratchet 211 on the tooth surface 21 can push the second pawl 32, causing the second pawl 32 to undergo outward elastic deformation. At the same time, the second pawl 32 can stretch the first elastic element 301 and cause the first elastic element 301 to undergo elastic deformation. When the second pawl 32 moves past the current ratchet 211 and moves to the next ratchet, the second pawl 32 will lose the pushing force of the ratchet 211. At the same time, the stretched first elastic element 301 can drive the second pawl 32 to reset until the second pawl 32 moves to the next ratchet and slides on the tooth surface 21 of the ratchet 20. In the second working mode, the power component 40 pushes the second pawl 32 to rotate the ratchet by a second angle through the connecting body 33, while causing the first pawl 31 to slide on the tooth surface 21 of the ratchet 20. During this process, the first pawl 31 can be pushed by the ratchet teeth 211 on the tooth surface 21, causing the first pawl 31 to undergo outward elastic deformation. At the same time, the first pawl 31 can stretch the first elastic member 301 and cause the first elastic member 301 to undergo elastic deformation. When the first pawl 31 moves past the current ratchet tooth 211 and moves to the next ratchet tooth, the first pawl 31 will lose the pushing force of the ratchet tooth 211. At the same time, the stretched first elastic member 301 can drive the first pawl 31 to reset until the first pawl 31 moves to the next ratchet tooth and slides on the tooth surface 21 of the ratchet 20.

[0060] like Figures 1 to 5 , Figure 7 , Figure 11 and Figure 12 As shown, in some embodiments, the power assembly 40 includes an electromagnet 41, a traction member 42, and a second elastic member 43. The first end face 421 of the traction member 42 is fixedly connected to the ratchet drive member 30, and the second end face 422 abuts against the second elastic member 43. In the first operating mode, the power assembly 40 drives the ratchet drive member 30 to perform a first movement, including controlling the electromagnet 41 to be energized to attract the traction member 42 and pull the ratchet drive member 30 to perform the first movement, while simultaneously forcing the second elastic member 43 to be compressed. In the second operating mode, the power assembly 40 drives the ratchet drive member 30 to perform a second movement, including controlling the electromagnet 41 to be de-energized to lose its attraction to the traction member 42, and the compressed second elastic member 43 to return to its original state to push the traction member 42 to drive the ratchet drive member 30 to perform the second movement. That is, when the fluid conveying device 100 is working, the movement of the traction member 42 is controlled by controlling the on and off of the electromagnet 41 to achieve the first and second movements. Specifically, the ratchet drive component 30 includes a first pawl 31, a second pawl 32, and a connecting body 33. When the electromagnet 41 is energized, it attracts the traction component 42, which pulls the first pawl 31, the second pawl 32, and the connecting body 33 to perform a first movement. When the electromagnet 41 is de-energized, the second elastic component 43 pushes the traction component 42 to perform a second movement using the first pawl 31, the second pawl 32, and the connecting body 33. The principles of the first and second movements are as described above and will not be repeated here. Since the electromagnet 41 is cheaper to manufacture than a micro motor, the overall cost of the fluid conveying device 100 can be reduced. Here, the connecting body 33 can be fixed to the first end face 421 of the traction component 42 using screws, bolts, or other fasteners 302. Alternatively, a shape memory wire can be used instead of the electromagnet 41 to achieve the movement of pulling the first pawl 31, the second pawl 32, and the connecting body 33.

[0061] like Figure 1 , Figure 3 , Figure 11 and Figure 12 As shown, in some embodiments, the fluid conveying device 100 further includes a base 60, on which the electromagnet 41, the traction member 42, and the second elastic member 43 are respectively mounted. That is, the fluid conveying device 100 can be assembled using the base 60 as a mounting foundation, achieving an integrated structure. Here, a limiting groove 61 is provided on the base 60 to accommodate the traction member 42, which moves within the limiting groove 61 with restricted movement. The range of movement of the traction member 42 is limited by the limiting groove 61, ensuring controlled movement, a compact structural layout, and efficient use of the space in the base 60.

[0062] like Figure 5 , Figure 6 As shown, in some embodiments, a third elastic element 201 is also installed inside the mounting sleeve 22. The third elastic element 201 is pre-compressed and abuts against the stepped surface 221 of the mounting sleeve 22 and the medicine reservoir 11 to push the ratchet 20 against one of the groove walls 611 of the limiting groove 61. This can realize the assembly limiting of the ratchet 20 in the base 60 and ensure the accuracy of the assembly position of the ratchet 20 on the base 60, so that the first pawl 31 and the second pawl 32 on the ratchet transmission component 30 can simultaneously elastically clamp onto the tooth surface 21 of the ratchet 20.

[0063] like Figures 1 to 5 As shown, in some embodiments, the traction member 42 is slidably installed in the limiting groove 61, so that when the fluid conveying device 100 is working, the ratchet transmission member 30 can be driven to perform a first movement or a second movement by controlling the sliding of the traction member 42 on the base 60. Here, the number of second elastic members 43 is configured to be at least one, and at least one second elastic member 43 is arranged on the side of the electromagnet 41 and abuts against the second end face 422 of the traction member 42. To ensure the balance of movement, two second elastic members 43 can be provided, respectively arranged on both sides of the electromagnet 41. This allows the traction member 42 to slide in the limiting groove 61 of the base 60 while simultaneously compressing multiple second elastic members 43, and the compressed multiple second elastic members 43 can simultaneously drive the traction member 42 to reset. It should be noted that the above-mentioned second elastic members 43 are configured as compression springs, rubber sleeves, or other accessories with high elasticity. Specifically, the number of second elastic members 43 can be configured to be two, and the two second elastic members 43 are arranged symmetrically on the left and right sides of the electromagnet 41. It is understandable that the number of the aforementioned second elastic element 43 can also be configured to be four, six, or even more.

[0064] like Figure 11 , Figure 12 As shown, in some embodiments, one end of the traction member 42 is rotatably mounted on the base 60, and the other end of the traction member 42 is a free end 420, which swings within the limiting groove 61. When the electromagnet 41 is de-energized and separated from the traction member 42, the elastic force generated by the compressed second elastic member 43 returning to its original state causes the free end of the traction member 42 to swing, thereby causing the ratchet transmission member 30 to perform a second movement.

[0065] In this embodiment, the second elastic element 43 abuts against the free end 420 of the traction element 42. This allows the traction element 42 to compress the second elastic element 43 while rotating within the limiting groove 61, and the compressed second elastic element 43 can drive the traction element 42 to return to its original position. It should be noted that the second elastic element 43 can also be configured as a compression spring, a rubber sleeve, or other highly elastic components; specifically, the number of second elastic elements 43 can be configured as one. It is understood that in other embodiments, the second elastic element 43 can also be configured as a torsion spring, which is installed at the rotatable connection between the traction element 42 and the base 60.

[0066] It is understood that when the power component 40 of the above embodiment is working, it drives the ratchet transmission component 30 to perform a first movement or a second movement by controlling the rotation of the traction component 42 within the base 60. Since the degree of freedom of the rotation mode is smaller, and the second elastic component 43 drives the rotation of the traction component 42 to reset, the stability of the fluid conveying device 100 can be further improved.

[0067] like Figure 5 , Figures 8 to 10 As shown, in some embodiments, the fluid delivery device 100 further includes a circuit board 50, on which a detection component 51 is electrically connected. The detection component 51 is used to detect the rotation angle of the ratchet 20 and to generate a feedback signal on the circuit board 50. Here, the detection component 51 can detect the rotation angle of the ratchet 20 by detecting the rotation angle of the sleeve 22 mounted on the ratchet 20. It should be noted that since the rotation angle of the ratchet 20 corresponds one-to-one with the delivery capacity of the liquid medicine 200 in the medicine reservoir 11 when it is delivered under the pushing of the piston rod 12, the fluid delivery device 100 can ultimately detect the delivery capacity of the liquid medicine 200 by detecting the rotation angle of the ratchet 20 when it is working, thus meeting the needs of automated control of the fluid delivery device 100. It is understood that in other embodiments, the detection component 51 can also be used to detect the rotation angle of the rotating sleeve 10, which will not be elaborated here.

[0068] like Figure 7 As shown, in some embodiments, the circuit board 50 is electrically connected to the electromagnet 41 to control the energization / de-energization of the electromagnet 41. Here, the circuit board 50 is electrically connected to the electromagnet 41 via contact. Specifically, the circuit board 50 can be fixedly mounted on the bottom of the base 60, and a battery 70 is electrically connected to the circuit board 50 to supply power to the circuit board 50. The battery 70 is mounted in the base 60 in an embedded manner.

[0069] It should be noted that the circuit board 50 integrates a main control chip (not shown), a clock chip (not shown), an antenna (not shown), and a Bluetooth module (not shown), among other control systems. When the Bluetooth module remotely receives an injection command, or when the clock chip triggers an injection command at a set time, the main control chip outputs a power-on signal. The control circuit then powers the electromagnet 41 to attract the traction component 42. After a certain period, the main control chip de-energizes the electromagnet 41. Once de-energized, the electromagnet 41 loses its attraction to the traction component 42, causing the traction component 42 to reset under the push of the second elastic element 43, ultimately achieving motion control of the ratchet transmission component 30.

[0070] like Figure 5 , Figures 8 to 10 As shown, in some embodiments, the detection component 51 includes two conductive elements 511, and the circuit board 50 can generate a feedback signal when a power-conducting circuit is formed between the two conductive elements 511. A conductive metal ring 23 is connected to the ratchet 20. One of the two conductive elements 511 maintains constant contact with the conductive metal ring 23, while the other maintains intermittent contact. In other words, the circuit board 50 can detect the rotation angle of the ratchet 20 by checking whether the two conductive elements 511 are conductive. Here, the conductive element 511 is configured as a conductive spring, conductive sheet, or other elastic object. The elastic deformation of the conductive element 511 ensures that one conductive element 511 maintains constant contact with the conductive metal ring 23, while the other conductive element 511 maintains intermittent contact. Simultaneously, it reduces the resistance generated by the contact between the conductive element 511 and the conductive metal ring 23 during the rotation of the ratchet 20.

[0071] As can be seen from the above, since one conductive element 511 is always in contact with the conductive metal ring 23, while the other conductive metal ring 23 is in contact with the conductive metal ring 23 intermittently, the two conductive elements 511 can be intermittently connected during the rotation of the conductive metal ring 23 following the ratchet 20. Thus, the circuit board 50 can generate a feedback signal according to the switching between the on and off states of the two conductive elements 511, ultimately achieving the purpose of detecting the rotation angle of the ratchet 20. Here, the conductive metal ring 23 is fixedly connected to the end of the mounting sleeve 22 that extends out of the ratchet 20. Specifically, it can be connected by a tight fit, or the conductive metal ring 23, the mounting sleeve 22, and the ratchet 20 can be integrally injection molded.

[0072] It should be noted that when the main control chip on the circuit board 50 receives the expected periodic change in the conduction state of the two conductive components 511, it can be determined that the ratchet 20 is rotating normally; however, when the conduction state of the two conductive components 511 no longer changes, it can be determined that the ratchet 20 is stuck, indicating a blockage, depletion of the medicine 200, or other issues. Accordingly, the circuit board 50 can issue an alarm through lights, a buzzer, or information sent via the APP.

[0073] like Figures 8 to 10 As shown, in some embodiments, the conductive metal ring 23 includes a circular body 231 and a plurality of extending protrusions 232. The plurality of extending protrusions 232 are arranged sequentially and spaced apart on one end of the circular body 231 along the circumferential direction of the circular body 231, and can be integrated with the circular body 231. One conductive element 511 is disposed on the outside of the circular body 231 and abuts against the circular body 231, so that the conductive element 511 and the conductive metal ring 23 are in constant contact; another conductive element 511 is disposed on the outside of the plurality of extending protrusions 232, and the conductive element 511 can abut against one of the extending protrusions 232 in a spaced manner, so that the conductive element 511 and the conductive metal ring 23 are in intermittent contact. Here, the area between two adjacent extended protrusions 232 can be filled by the mounting sleeve 22, so that during the rotation of the ratchet 20, the conductive element 511 can alternately contact the extended protrusion 232 or the mounting sleeve 22. When the conductive element 511 contacts the mounting sleeve 22, the two conductive elements 511 are in an open circuit state. It should be noted that multiple extended protrusions 232 can be arranged at equal intervals at one end of the annular body 231. The specific number of extended protrusions 232 can be set according to the specific needs of use, which will not be elaborated here.

[0074] In summary, the fluid delivery device 100 of this application drives the ratchet transmission component 30 by controlling the on and off of the electromagnet 41 to cause the ratchet 20 to rotate at a certain angle in a preset direction, thereby realizing fluid delivery control. This not only simplifies the structure of the fluid delivery device 100, reduces its size and lowers its cost, but also improves the control accuracy and reliability of the fluid delivery device 100 during operation.

[0075] In addition, this application also provides a blood glucose management system, including the fluid delivery device 100 described above. Specifically, the reservoir 11 is filled with insulin. The fluid delivery device 100 provided in this embodiment replaces the motor drive and uses an electromagnet with a more cost-effective method. By switching the power on and off, the second elastic element 43 is linked with the ratchet transmission element 30 or the first pawl 31, the second pawl 32 and the connecting body 33 to achieve the first or second movement, thereby driving the ratchet 20 to rotate at the first or second angle. This drives the piston rod 12 to move linearly in the reservoir 11 through the rotating sleeve 22, squeezing out insulin and realizing automatic insulin infusion. The whole machine structure is lighter and the cost is controlled.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0077] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A fluid delivery device (100), the fluid delivery device (100) comprising a drug reservoir (11); characterized in that, The fluid transport device (100) includes: Rotate the sleeve (10) and thread it onto the piston rod (12) of the medicine reservoir (11); The ratchet (20) is mounted on the rotating sleeve (10) in a circumferential limiting manner; The ratchet drive component (30) is elastically clamped on the tooth surface (21) of the ratchet (20); The power assembly (40) is connected to the ratchet drive (30) in a transmission connection; The power assembly (40) includes a first working mode and a second working mode for continuous operation. In the first working mode, the power assembly (40) drives the ratchet transmission member (30) to perform a first movement, thereby driving the ratchet (20) to rotate a first angle along a preset direction. In the second working mode, the power assembly (40) drives the ratchet transmission member (30) to perform a second movement, thereby driving the ratchet (20) to rotate a second angle along the preset direction.

2. The fluid conveying device according to claim 1, characterized in that, The ratchet drive component (30) includes a first pawl (31) and a second pawl (32), the first pawl (31) and the second pawl (32) are arranged opposite to each other and are elastically clamped on the tooth surface (21) of the ratchet (20); In the first working mode, the first movement includes rotating the ratchet (20) by a first angle along the preset direction by the first pawl (31), and the second pawl (32) sliding on the tooth surface (21) of the ratchet (20) to cooperate with the first pawl (31) to rotate the ratchet (20) by the first angle; in the second working mode, the second movement includes rotating the ratchet (20) by a second angle along the preset direction by the second pawl (32), and the first pawl (31) sliding on the tooth surface (21) of the ratchet (20) to cooperate with the second pawl (32) to rotate the ratchet (20) by the second angle.

3. The fluid conveying device according to claim 2, characterized in that, An included angle P is formed between the first pawl (31) and the second pawl (32), and P ≥ 10°.

4. The fluid conveying device according to claim 2, characterized in that, A first elastic element (301) is connected between the first pawl (31) and the second pawl (32). The first elastic element (301) is used to provide elastic force to the first pawl (31) and the second pawl (32) so that the first pawl (31) and the second pawl (32) are elastically clamped on the tooth surface (21) of the ratchet (20).

5. The fluid conveying device according to claim 2, characterized in that, The first pawl (31) and / or the second pawl (32) are configured as elastic sheet structures.

6. The fluid conveying device according to claim 1, characterized in that, The power assembly (40) includes an electromagnet (41), a traction member (42), and a second elastic member (43). The first end face (421) of the traction member (42) is fixedly connected to the ratchet transmission member (30), and the second end face abuts against the second elastic member (43). In the first working mode, the power component (40) drives the ratchet drive (30) to perform a first movement, which includes controlling the electromagnet (41) to be energized to attract the traction member (42) and pull the ratchet drive (30) to perform the first movement, while the traction member (42) compresses the second elastic member (43) to produce elastic deformation; in the second working mode, the power component (40) drives the ratchet drive (30) to perform a second movement, which includes controlling the electromagnet (41) to lose its attraction to the traction member (42) after being de-energized, and the compressed second elastic member (43) to return to its original state to push the traction member (42) to drive the ratchet drive (30) to perform the second movement.

7. The fluid conveying device according to claim 6, characterized in that, The fluid transport device (100) also includes a base (60), on which the electromagnet (41), the traction member (42), and the second elastic member (43) are respectively mounted; A limiting groove (61) is provided on the base (60), the limiting groove (61) is used to accommodate the traction member (42), and the traction member moves in a restricted manner within the limiting groove (61).

8. The fluid conveying device according to claim 7, characterized in that, The traction member (42) is slidably installed in the limiting groove (61), and the number of the second elastic member (43) is configured to be at least one, with at least one second elastic member (43) abutting against the second end face (422) of the traction member (42).

9. The fluid conveying device according to claim 7, characterized in that, One end of the traction member (42) is rotatably installed in the limiting groove (61), and the other end is a free end (420), which swings in the limiting groove (61); The second elastic member (43) abuts against the free end (420) of the traction member (42).

10. A blood glucose management system, characterized in that, Includes the fluid transport device (100) as described in any one of claims 1 to 9.

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