A high-precision chip-based micropump wearable precision syringe

Abstract

The present invention discloses a high-precision chip-type micropump wearable precision syringe, which specifically relates to the technical field of medical devices. The present invention evacuates a hydraulic liquid supply tank to a vacuum to form a negative pressure, and then the needle tip of a liquid-filled injection needle pierces a heparin cap, so that the drug driving liquid is pressed into the hydraulic liquid supply tank and squeezes the piston of the pushing unit to move to one side. The volume of the hydraulic liquid supply tank increases, and the drug driving liquid enters the micropump unit through the micropump liquid inlet hole. Since the micropump unit swings to a fixed value each time, the drug driving liquid is accurately driven and controlled, and the injection volume is accurately controlled. The piston member in the cartridge bottle is pushed forward to quantitatively push the injection liquid, and the liquid drives the liquid, so that the infusion is accurate and reliable; the implanted spring pushes the indwelling needle catheter seat to be clamped into the convex ring cavity. Afterwards, the stainless steel needle is withdrawn, leaving only the soft indwelling needle catheter in the blood vessel. Injection is performed through the indwelling needle catheter without waiting for too long, thereby reducing the discomfort and pain caused to the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a high-precision chip-type micropump wearable precision syringe. Background Art

[0002] A wearable injector is an automatic injection system that can be worn on the body. It is widely used in cancer treatment, autoimmune treatment, blood disease treatment and other fields. It can continuously or periodically deliver drugs to the patient's body. It is usually designed as a patch or wearable so that patients can manage their own treatment at home or in a clinical setting, providing patients with a more convenient, comfortable and autonomous drug injection experience.

[0003] However, existing wearable syringes usually use a needle to pierce the skin for injection. The drug is delivered to the subcutaneous tissue through the needle. The injection process may last from a few seconds to a few minutes. After the injection is completed, the needle retracts. When the injection wait is long, it means that the needle needs to remain extended for a long time. The long-term contact of the needle causes discomfort and pain to the patient, affecting the user experience. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-precision chip-type micropump wearable precision syringe to solve the problem mentioned in the above background technology that when waiting for injection for a long time, the needle needs to remain extended for a long time, and the long-term contact of the needle causes discomfort and pain to the patient, affecting the user experience.

[0005] The present invention can be implemented through the following technical solutions: a high-precision chip-type micro-pump wearable precision syringe, comprising two mutually engaged injection box bodies, wherein the interior of one injection box body is divided into a hydraulic liquid supply chamber, a control chamber, a micro-pump chamber and a semi-engaging chamber 1, and a liquid-filled injection needle for injecting a liquid driving liquid is connected to one side of the injection box body, the micro-pump chamber is connected to the semi-engaging chamber 1, the interior of the other injection box body is divided into a power supply control chamber, a semi-engaging chamber 2 and an infusion chamber, and a convex ring cavity is provided on the upper surface edge of the other injection box body, and a An indwelling needle implantation assembly, wherein a unit piston is slidably mounted on the inner wall surface of the hydraulic liquid supply tank near the end thereof, and a micropump liquid inlet hole communicating with the micropump unit is provided on the inner wall surface of the hydraulic liquid supply tank, a heparin cap for piercing the liquid-filled injection needle is provided on the inner wall surface of the hydraulic liquid supply tank, a micropump unit is installed in the micropump tank, the semi-clamping tank one and the semi-clamping tank two form a complete clamping cavity, a cartridge bottle is detachably arranged in the clamping cavity, a mounting seat connected to the liquid outlet end of the micropump unit is provided on the end surface of the inner wall surface of the semi-clamping tank one, and an adhesive unit is provided on the bottom surface of the injection box body;

[0006] The indwelling needle implantation assembly comprises an indwelling needle catheter seat, wherein the indwelling needle catheter is clamped in the middle of the inner cavity of the indwelling needle catheter seat;

[0007] The indwelling needle implantation assembly further comprises an inner sleeve clamped on the top of the indwelling needle catheter seat, the inner cavity of the inner sleeve is provided with a steel needle seat, the interior of the steel needle seat is sleeved with a return spring, and a stainless steel needle is fixed in the middle of the steel needle seat, and the indwelling needle catheter is arranged outside the stainless steel needle;

[0008] An outer sheath is slidably provided on the outside of the inner sheath, a rotating handle is rotatably sleeved on the outside of the outer sheath, and a safety ring is clamped on the outer surface of the outer sheath. The rotating handle is clamped with the indwelling needle catheter seat, and an implantation spring is sleeved on the outside of the inner sheath.

[0009] A further technical improvement of the present invention is that: two connecting pins are fixedly provided on the locking seat on the inner wall of the outer sleeve, and a slideway for sliding corresponding to the connecting pin is provided on the outer wall of the inner sleeve, and an inclined accommodating groove is provided at the end of each slideway, and one end of the implanted spring is fixed to the locking seat.

[0010] A further technical improvement of the present invention is that: two connecting pins 2 are installed on the outer wall surface of the end of the steel needle seat, and a straight slide groove is provided on the side of the outer wall surface of the inner sleeve adjacent to the slide. There are two straight slide grooves, and the inner wall surface of the straight slide groove is provided with a card groove. Initially, the connecting pin 2 is fixed by the card groove. After the connecting pin 1 enters the accommodating groove from the slide, the inner sleeve rotates. At this time, the connecting pin 2 disengages from the card groove, and then the return spring pushes the steel needle seat to slide in the straight slide groove to a limited position, and the tip of the stainless steel needle is retracted from the indwelling needle catheter.

[0011] A further technical improvement of the present invention is that: a circulation hole is provided on one side surface of the indwelling needle catheter seat, and a sealing rubber cap is embedded and installed on the upper surface of the indwelling needle catheter seat, a fixed block is provided on the top outer surface of the indwelling needle catheter seat, and an elastic oblique protrusion is provided at the end of the straight slide groove to engage with the fixed block, and two lugs are symmetrically provided on the outside of the indwelling needle catheter seat.

[0012] A further technical improvement of the present invention is that: a Luer needle seat is installed on the inner wall surface of the infusion tank, one end of the Luer needle seat is connected to an infusion tube, and the infusion tube is connected to the flow hole;

[0013] A piston is movably provided inside the cartridge, and one end of the cartridge close to the mounting seat is set to be open. A sealing rubber plug is sleeved on the outside of the liquid outlet end of the mounting seat, and the sealing rubber plug contacts the inner wall surface of the open end of the cartridge. A Luer plug is installed at one end of the cartridge close to the Luer needle seat, and the needle on the Luer needle seat pierces the Luer plug and enters the interior of the cartridge.

[0014] A further technical improvement of the present invention is that: the outer surface of the outer sheath is provided with a movable groove for cooperating with the convex strip in the rotating handle, the end of the movable groove is provided with a locking groove for cooperating with the safety ring, the lower surface of the safety ring is provided with a groove for cooperating with the convex strip on the inner wall surface of the rotating handle, and the end of the rotating handle is provided with a blocking block, which is in clamping contact with the lug.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The hydraulic fluid supply tank is evacuated to form a negative pressure, and then the needle tip of the liquid-filled injection needle pierces the heparin cap. Under the action of the external atmospheric pressure, the drug driving liquid is pressed into the hydraulic fluid supply tank and squeezes the piston of the push unit to move to one side. The volume of the hydraulic fluid supply tank increases, and the position of the micropump inlet is exposed at this time. The drug driving liquid enters the micropump unit through the micropump inlet. After passing through the micropump unit, the piezoelectric ceramic is deformed and drives the swing arm to swing. Since the micropump unit swings at a fixed value each time, the drug driving liquid is accurately driven and controlled, and the injection volume is accurately controlled each time. The drug driving liquid is accurately controlled and delivered to the cartridge bottle, and the piston in the cartridge bottle is pushed forward to quantitatively push the injection liquid. Liquid drives liquid, and the infusion is accurate and reliable. The integrated design of the unit and the hydraulic fluid supply tank enables seamless connection between the drug driving fluid and the injection fluid, thereby improving the injection accuracy. Initially, the rotating handle locks the indwelling needle catheter seat, and the implantation spring is in a compressed state at this time. Then, the safety ring is pushed upward, and the handle is rotated. At this time, the locking limit of the rotating handle and the indwelling needle catheter seat is released, and the implantation spring pushes the indwelling needle catheter seat to be locked in the convex ring cavity, thereby completing the insertion of the stainless steel needle and the indwelling needle catheter into the blood vessel together. When the indwelling needle catheter is successfully delivered into the blood vessel, the stainless steel needle is withdrawn, leaving only the soft indwelling needle catheter in the blood vessel, and the injection fluid in the indwelling needle catheter seat is injected through the indwelling needle catheter, without having to wait too long, reducing the discomfort and pain caused to the patient and improving the user experience.

[0017] 2. By setting up the indwelling needle implantation assembly, the blocking block on the rotating handle blocks the lug, and the rotating handle cannot be rotated at this time, and the connecting pin is located at the end of the slideway away from the accommodating groove. At this time, the implantation spring is in a compressed state. As shown in the figure, when the indwelling needle implantation assembly is started, the safety ring is dialed upward. At this time, the convex strip on the rotating handle is disengaged from the restriction of the locking groove. By twisting the rear safety ring, the convex strip on the rotating handle can be rotated in the movable groove. The rotating handle is rotated and dialed to drive the blocking block to move together. After the blocking block rotates, it disengages from the lug, releasing the elastic restriction of the implantation spring. At this time, the implantation spring pushes the indwelling needle catheter seat to be stuck in the convex ring cavity, and then The puncture work of the stainless steel needle and the indwelling needle catheter is completed, and the other end of the implantation spring is fixed to the locking seat. Under the reset of the elastic potential energy of the implantation spring, the connecting pin 1 on the outer sheath is pushed to slide from the slideway to the receiving groove. Under the oblique push of the receiving groove, the inner sheath drives the indwelling needle catheter seat to rotate clockwise for a short distance in the convex ring cavity. At this time, the connecting pin 2 is disengaged from the locking groove, releasing the compression limit of the return spring, and the return spring pushes the steel needle seat to slide within the straight slide groove. The stainless steel needle on the steel needle seat is retracted from the indwelling needle catheter, and the indwelling needle catheter remains in the human body. The split design has a reasonable structure, and the stainless steel needle can be automatically retracted when the indwelling needle catheter is implanted, and the operation is simple.

[0018] 3. The liquid-filled injection needle, indwelling needle implant assembly and cartridge bottle are designed as a split structure, which is easy to dismantle and replace. It is also easy to replace the liquid medicine and use the device twice. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 Schematic diagram of the three-dimensional structure of the bottom of the present invention;

[0022] Figure 3 Schematic diagram of the three-dimensional installation structure of the battery of the present invention;

[0023] Figure 4 The structure of the injection box of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 5 Schematic diagram of the three-dimensional installation structure of the Luer needle hub and the indwelling needle implant assembly of the present invention;

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the micro pump unit of the present invention;

[0026] Figure 7This is a schematic diagram of the three-dimensional disassembled structure of the indwelling needle implant assembly of the present invention;

[0027] Figure 8 A three-dimensional cross-sectional view of the indwelling needle implant assembly of the present invention installed on the injection box from another angle;

[0028] Figure 9 This is a three-dimensional cross-sectional view of the stainless steel needle of the present invention when it rebounds;

[0029] Figure 10 This is a three-dimensional cross-sectional view of the stainless steel needle and the indwelling needle catheter of the present invention in a state of being pierced together;

[0030] Figure 11 This is a three-dimensional cross-sectional view of the initial state of the indwelling needle implantation assembly of the present invention.

[0031] Figure: 1. Injection box; 11. Heparin cap; 12. Applicator layer; 121. Through groove; 122. Protective film; 13. Cartridge; 131. Mounting seat; 14. Luer needle seat; 141. Infusion tube; 15. Micropump unit; 151. Bluetooth module; 152. Micropump control board; 153. Chip pump module; 154. Piezoelectric swing arm; 16. Battery; 161. Control circuit board; 17. Hydraulic fluid supply tank; 171. Unit piston; 172. Micropump inlet hole; 2. Liquid-filled injection needle; 4. Indwelling needle implant assembly; 41. Raised ring Cavity; 42, indwelling needle catheter seat; 421, indwelling needle catheter; 422, flow hole; 423, sealing rubber cap; 424, fixed block; 425, lug; 43, rotating handle; 431, blocking block; 44, outer sheath; 441, movable groove; 442, connecting pin 1; 46, safety ring; 47, inner sleeve; 471, slideway; 472, straight slide groove; 473, implant spring; 474, steel needle seat; 475, connecting pin 2; 476, slot; 477, elastic oblique protrusion; 478, return spring; 479, stainless steel needle. DETAILED DESCRIPTION

[0032] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0033] See also Figures 1-11As shown, the present invention provides a high-precision chip-type micro-pump wearable precision syringe, comprising two mutually engaged injection box bodies 1, the interior of one injection box body 1 is divided into a hydraulic liquid supply chamber 17, a control chamber, a micro-pump chamber and a semi-engaging chamber 1, and one side of the injection box body 1 is connected to a liquid-filled injection needle 2 for injecting a drug driving liquid, the drug driving liquid is injected through the liquid-filled injection needle 2, and when the liquid-filled injection needle 2 is pulled in the reverse direction, the exhaust effect is achieved, the micro-pump chamber is connected to the semi-engaging chamber 1, the interior of the other injection box body 1 is divided into a power supply control chamber, a semi-engaging chamber 2 and an infusion chamber, and the upper surface edge of the other injection box body 1 is provided with a convex ring cavity 41, and a convex ring cavity 41 is provided inside the convex ring cavity 41. There is an indwelling needle implantation component 4, a unit piston 171 is slidably installed on the inner wall surface of the hydraulic liquid supply chamber 17 near the end, and a micropump liquid inlet hole 172 communicating with the micropump unit 15 is provided on the inner wall surface of the hydraulic liquid supply chamber 17, a heparin cap 11 for piercing the liquid-filled injection needle 2 is provided on the inner wall surface of the hydraulic liquid supply chamber 17, a micropump unit 15 is installed in the micropump chamber, the semi-clamping chamber 1 and the semi-clamping chamber 2 form a complete clamping cavity, a cartridge bottle 13 is detachably provided in the clamping cavity, a piston member is movably provided inside the cartridge bottle 13, a mounting seat 131 connected to the liquid outlet end of the micropump unit 15 is provided at the end of the inner wall surface of the semi-clamping chamber 1, and an adhesive unit is provided on the bottom surface of the injection box body 1;

[0034] The indwelling needle implantation assembly 4 includes an indwelling needle catheter seat 42, and an indwelling needle catheter 421 is clamped in the middle of the inner cavity of the indwelling needle catheter seat 42;

[0035] The indwelling needle implantation assembly 4 also includes an inner sleeve 47 that is clamped on the top of the indwelling needle catheter seat 42. The outer side of the inner sleeve 47 is slidingly provided with an outer sleeve 44, and the inner cavity of the inner sleeve 47 is provided with a steel needle seat 474. The interior of the steel needle seat 474 is sleeved with a return spring 478, and a stainless steel needle 479 is fixed to the middle of the steel needle seat 474. The indwelling needle catheter 421 is provided on the outside of the stainless steel needle 479. The outer side of the outer sleeve 44 is rotatably sleeved with a rotating handle 43, and the outer surface of the outer sleeve 44 is clamped with a safety ring 46. The rotating handle 43 is clamped with the indwelling needle catheter seat 42, and the outer side of the inner sleeve 47 is sleeved with an implantation spring 473.

[0036] See also Figure 1 、 Figure 4 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown, the medical staff first installs one end of the cartridge bottle 13 filled with injection liquid into the semi-clamping chamber 1, and then installs the other end of the cartridge bottle 13 into the semi-clamping chamber 2. At this time, the two injection box bodies 1 are completely clamped, and then the needle tip of the Luer needle seat 14 pierces one end of the cartridge bottle 13. The injection box body 1 is attached to the patient's injection site through the provided adhesive unit, and then the indwelling needle implantation assembly 4 is started. Initially, the indwelling needle catheter seat 42 is locked by the rotating handle 43. At this time, the implantation spring 473 is in a compressed state, and then it is pushed to the left. Push the safety ring 46 upward, and then rotate the handle 43. At this time, the locking limit between the rotating handle 43 and the indwelling needle catheter seat 42 is released, and the implantation spring 473 pushes the indwelling needle catheter seat 42 to be clamped into the convex ring cavity 41, thereby completing the insertion of the stainless steel needle 479 and the indwelling needle catheter 421 into the blood vessel. When the indwelling needle catheter 421 is successfully sent into the blood vessel, the stainless steel needle 479 is withdrawn, leaving only the soft indwelling needle catheter 421 in the blood vessel, and the injection liquid in the indwelling needle catheter seat 42 is injected through the indwelling needle catheter 421.

[0037] See also Figure 1 、 Figure 2 and Figure 4 As shown, before injection, the hydraulic fluid supply tank 17 is evacuated to form a negative pressure. Then, the vacuum environment removes air and impurities in the hydraulic fluid supply tank 17 to ensure the purity of the drug driving fluid. On the other hand, since the air is discharged, the drug driving fluid is pressed into the hydraulic fluid supply tank 17 under the action of the external atmospheric pressure. The needle tip of the liquid-filled injection needle 2 pierces the heparin cap 11, and the drug driving fluid enters the hydraulic fluid supply tank 17, squeezing and pushing the unit piston 171 to move to one side, and the volume of the hydraulic fluid supply tank 17 increases. At this time, the position of the micropump liquid inlet hole 172 is exposed, and the drug driving liquid enters the micropump unit 15 through the micropump liquid inlet hole 172. The micropump unit 15 and the hydraulic liquid supply tank 17 are designed as an integrated whole, so that the drug driving liquid and the injection liquid are seamlessly connected, thereby improving the injection accuracy and ensuring accurate and reliable infusion. After the liquid is discharged from the micropump unit 15, the drug driving liquid is precisely controlled to be delivered to the cartridge bottle 13, and then the piston in the cartridge bottle 13 is pushed forward to quantitatively push the injection liquid. The hydraulic drive uses liquid to drive liquid, and the infusion is accurate and reliable.

[0038] See Figure 7 、 Figure 8 、 Figure 9 and Figure 11 As shown, two connecting pins 442 are fixedly provided on the locking seat on the inner wall of the outer sheath 44, and a slide 471 for sliding corresponding to the connecting pins 442 is provided on the outer wall of the inner sheath 47. The end of each slide 471 is provided with an inclined receiving groove, and one end of the implant spring 473 is fixed to the locking seat;

[0039] Two connecting pins 475 are installed on the outer wall surface of the end of the steel needle seat 474, and a straight slide groove 472 is provided on the side of the outer wall surface of the inner sleeve 47 adjacent to the slide 471. There are two straight slide grooves 472, and the inner wall surface of the straight slide groove 472 is provided with a card groove 476. Initially, the connecting pin 2 475 is fixed by the card groove 476. After the connecting pin 1 442 enters the accommodating groove from the slide 471, the inner sleeve 47 rotates. At this time, the connecting pin 2 475 is disengaged from the card groove 476, and then the return spring 478 pushes the steel needle seat 474 to slide in the straight slide groove 472 to limit the position, and the tip of the stainless steel needle 479 is retracted from the indwelling needle catheter 421.

[0040] See Figure 7 and Figure 9 As shown, a circulation hole 422 is provided on one side surface of the indwelling needle catheter seat 42, and a sealing rubber cap 423 is embedded and installed on the upper surface of the indwelling needle catheter seat 42. One end of the infusion tube 141 is connected to the circulation hole 422. A fixed block 424 is provided on the top outer surface of the indwelling needle catheter seat 42. The end of the straight slide groove 472 is provided with an elastic inclined protrusion 477 that is engaged with the fixed block 424. Two lugs 425 are symmetrically provided on the outside of the indwelling needle catheter seat 42.

[0041] Initially, the inner sleeve 47 and the indwelling needle catheter seat 42 are engaged with the elastic oblique protrusion 477 through the fixed block 424. At this time, the return spring 478 is in a compressed state, and the stainless steel needle 479 and the indwelling needle catheter 421 have completed the piercing action of the sealing rubber cap 423.

[0042] See Figure 7 and Figure 11 As shown, the outer surface of the outer sheath 44 is provided with a movable groove 441 for cooperating with the convex strip in the rotating handle 43, the end of the movable groove 441 is provided with a locking groove for cooperating with the safety ring 46, the lower surface of the safety ring 46 is provided with a groove for cooperating with the convex strip on the inner wall of the rotating handle 43, and the end of the rotating handle 43 is provided with a blocking block 431, which is in engagement with the lug 425.

[0043] Initially, the ridge on the rotating handle 43 is engaged with the locking groove in the safety ring 46, and the blocking block 431 on the rotating handle 43 blocks the engagement with the lug 425. At this time, the rotating handle 43 cannot be rotated, and the connecting pin 1 442 is located at the end of the slideway 471 away from the receiving groove. At this time, the implanted spring 473 is in a compressed state. Figure 11As shown, when the indwelling needle implantation assembly 4 is started, the safety ring 46 is dialed upwards. At this time, the convex strip on the rotating handle 43 is disengaged from the restriction of the locking groove. By twisting the rear safety ring 46, the convex strip on the rotating handle 43 can be rotated in the movable groove 441. The rotating handle 43 is rotated and dialed to drive the blocking block 431 to move together. After the blocking block 431 rotates, it disengages from the lug 425, releasing the elastic restriction of the implantation spring 473. At this time, the implantation spring 473 pushes the indwelling needle catheter seat 42 to be stuck in the convex ring cavity 41, thereby completing the insertion of the stainless steel needle 479 and the indwelling needle catheter 421, and the other end of the implantation spring 473 Fixed with the locking seat, when the implanted spring 473 is reset by elastic potential energy, it pushes the connecting pin 1 442 on the outer sheath 44 to slide from the slide 471 to the receiving groove. Under the oblique push of the receiving groove, the inner sleeve 47 drives the indwelling needle catheter seat 42 to rotate clockwise a short distance in the convex ring cavity 41. At this time, the connecting pin 2 475 disengages from the locking groove 476, releasing the compression limit of the return spring 478, and the return spring 478 pushes the steel needle seat 474 to slide in the straight slide groove 472. The stainless steel needle 479 on the steel needle seat 474 is retracted from the indwelling needle catheter 421, while the indwelling needle catheter 421 remains in the human body, and the injection continues, and the action is completed.

[0044] See Figure 4 As shown, a Luer needle seat 14 is installed on the inner wall of the infusion tank, and one end of the Luer needle seat 14 is connected to an infusion tube 141, and the infusion tube 141 is connected to the flow hole 422;

[0045] The end of the cartridge 13 near the mounting seat 131 is set to be open. The outer portion of the liquid outlet end of the mounting seat 131 is sleeved with a sealing rubber plug, which contacts the inner wall surface of the open end of the cartridge 13. The end of the cartridge 13 near the Luer needle holder 14 is installed with a Luer stopper. The cartridge 13 contains injection liquid. The needle on the Luer needle holder 14 pierces the Luer stopper and enters the interior of the cartridge 13.

[0046] The micropump unit 15 quantitatively inputs a drug driving liquid into the piston member in the cartridge 13, causing the piston member to push the injection liquid forward in a quantitative manner. The hydraulic drive uses liquid to drive liquid. The injection liquid is transferred from the Luer needle adapter 14 to the infusion tube 141 and finally reaches the indwelling needle catheter adapter 42, so that the injection liquid in the cartridge 13 can be evenly and quantitatively injected into the patient's body.

[0047] See Figure 6As shown, the micropump unit 15 includes a chip pump module 153, a micropump control board 152 is provided on the upper surface of the chip pump module 153, and a piezoelectric swing arm 154 made of piezoelectric ceramics is provided on one side of the chip pump module 153. By utilizing the piezoelectric effect of the piezoelectric ceramics and serving as a power unit, precise control of the swing arm movement can be achieved, thereby achieving precise drive and control of the drug driving liquid. The chip pump module 153 and the micropump control board 152 are integrated together to form an integrated microfluidic system. A pressure sensor is installed at the liquid outlet end of the chip pump module 153, and a Bluetooth module 151 is provided on the upper surface of the micropump control board 152, which receives information such as the injection volume and injection pressure of the cartridge 13 through the Bluetooth module 151.

[0048] See Figure 1 、 Figure 3 and Figure 4 As shown, a battery 16 is installed inside the power supply control compartment, and a control circuit board 161 is provided on the upper surface of the battery 16. One end of the control circuit board 161 extends and is installed in the control compartment. The upper surface of one injection box body 1 is set as a closed structure, and the upper surfaces of the control compartment, micro pump compartment and semi-clamping compartment 1 of the other injection box body 1 are provided with the same cover plate, and a liquid level sensor used in conjunction with the cartridge bottle 13 is fixed on the inner wall of the semi-clamping compartment 1.

[0049] Electrical components such as the liquid level sensor, the control circuit board 161, the battery 16, the micro pump unit 15 and the pressure sensor are all electrically connected to realize the intelligent operation of the syringe and monitor information such as the driving pressure of the syringe and the infusion accuracy.

[0050] See Figure 2 As shown, the bonding unit includes a patch layer 12 matched with the bottom surface of the injection box body 1, a protective film 122 is bonded to the lower surface of the patch layer 12, and a through groove 121 communicating with the convex ring cavity 41 is provided on the patch layer 12. When in use, after tearing off the protective film 122, the injection box body 1 can be adhered to the patient's injection site through the patch layer 12 for use.

[0051] When the present invention is in use, the hydraulic liquid supply tank 17 is first evacuated to a vacuum to form a negative pressure, and then the needle tip of the liquid-filled injection needle 2 is pierced through the heparin cap 11. Under the action of the external atmospheric pressure, the drug driving liquid is pressed into the hydraulic liquid supply tank 17, and the piston 171 of the squeeze-pushing unit is moved to one side. The volume of the hydraulic liquid supply tank 17 increases, and the position of the micropump liquid inlet hole 172 is exposed at this time. The drug driving liquid enters the micropump unit 15 through the micropump liquid inlet hole 172. After the micropump unit 15 quantitatively discharges the liquid, the drug driving liquid is precisely controlled to be delivered to the cartridge bottle 13, and the piston member in the cartridge bottle 13 is pushed forward to quantitatively push the injection liquid, so that the liquid drives the liquid, and the infusion is accurate and reliable. The micropump unit 15 and the hydraulic liquid supply tank 17 are designed as an integrated whole, so that the drug driving liquid and the injection liquid are seamlessly connected, providing a high-efficiency and high-efficiency liquid. High injection accuracy. Initially, the indwelling needle catheter seat 42 is locked by the rotating handle 43. At this time, the implantation spring 473 is in a compressed state. Then, the safety ring 46 is pushed upward, and then the handle 43 is rotated. At this time, the locking limit of the rotating handle 43 and the indwelling needle catheter seat 42 is released, and the implantation spring 473 pushes the indwelling needle catheter seat 42 to be locked in the convex ring cavity 41, thereby completing the stainless steel needle 479 and the indwelling needle catheter 421 to penetrate the blood vessel together. When the indwelling needle catheter 421 is successfully sent into the blood vessel, the stainless steel needle 479 is withdrawn, leaving only the soft indwelling needle catheter 421 in the blood vessel, and the injection liquid in the indwelling needle catheter seat 42 is injected through the indwelling needle catheter 421. There is no need to wait too long, which reduces the discomfort and pain caused to the patient and improves the user experience.

[0052] By setting the indwelling needle implantation assembly 4, the blocking block 431 on the rotating handle 43 blocks the engagement with the lug 425. At this time, the rotating handle 43 cannot be rotated, and the connecting pin 1 442 is located at the end of the slideway 471 away from the receiving groove. At this time, the implantation spring 473 is in a compressed state. Figure 11As shown, when the indwelling needle implantation assembly 4 is started, the safety ring 46 is dialed upwards. At this time, the convex strip on the rotating handle 43 is disengaged from the restriction of the locking groove. By twisting the rear safety ring 46, the convex strip on the rotating handle 43 can be rotated in the movable groove 441. The rotating handle 43 is rotated and dialed to drive the blocking block 431 to move together. After the blocking block 431 rotates, it disengages from the lug 425, releasing the elastic restriction of the implantation spring 473. At this time, the implantation spring 473 pushes the indwelling needle catheter seat 42 to be stuck in the convex ring cavity 41, thereby completing the insertion of the stainless steel needle 479 and the indwelling needle catheter 421, and the other end of the implantation spring 473 is fixed to the locking seat. When the implantation spring 473 is elastic, Under the reset of the potential energy, the connecting pin 1 442 on the outer sheath 44 is pushed to slide from the slideway 471 to the receiving groove. Under the oblique push of the receiving groove, the inner sheath 47 drives the indwelling needle catheter seat 42 to rotate clockwise for a short distance in the convex ring cavity 41. At this time, the connecting pin 2 475 is disengaged from the card slot 476, releasing the compression limit of the return spring 478. The return spring 478 pushes the steel needle seat 474 to slide within the straight slide slot 472. The stainless steel needle 479 on the steel needle seat 474 is retracted from the indwelling needle catheter 421, and the indwelling needle catheter 421 remains in the human body. The split design has a reasonable structure, so that the stainless steel needle 479 can be automatically retracted when the indwelling needle catheter 421 is implanted, and the operation is simple.

[0053] The liquid-filled injection needle 2, the indwelling needle implantation assembly 4 and the cartridge bottle 13 are designed as a split structure, which is easy to dismantle and replace, and it is also easy to replace the liquid medicine and use the device twice.

[0054] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-precision chip-type micropump wearable precision syringe, characterized by: The invention comprises two mutually engaged injection box bodies (1), wherein the interior of one injection box body (1) is divided into a hydraulic liquid supply chamber (17), a control chamber, a micro pump chamber and a semi-engaging chamber 1, and a liquid filling injection needle (2) for injecting a liquid driving liquid is connected to one side of the injection box body (1), and the micro pump chamber is connected to the semi-engaging chamber 1. The interior of the other injection box body (1) is divided into a power supply control chamber, a semi-engaging chamber 2 and an infusion chamber, and a convex ring cavity (41) is provided on the upper surface edge of the other injection box body (1), and an indwelling needle implantation assembly (4) is provided in the convex ring cavity (41). The inner wall surface of the hydraulic liquid supply chamber (17) is close to the end slide. A unit piston (171) is dynamically installed, and a micropump liquid inlet hole (172) communicating with the micropump unit (15) is provided on the inner wall surface of the hydraulic liquid supply chamber (17), a heparin cap (11) for piercing the liquid-filled injection needle (2) is provided on the inner wall surface of the hydraulic liquid supply chamber (17), a micropump unit (15) is installed in the micropump chamber, the semi-clamping chamber 1 and the semi-clamping chamber 2 form a complete clamping cavity, a card bottle (13) is detachably provided in the clamping cavity, a mounting seat (131) connected to the liquid outlet end of the micropump unit (15) is provided at the end of the inner wall surface of the semi-clamping chamber 1, and an adhesive unit is provided on the bottom surface of the injection box body (1); The indwelling needle implantation assembly (4) comprises an indwelling needle catheter seat (42), and an indwelling needle catheter (421) is clamped in the middle of the inner cavity of the indwelling needle catheter seat (42); The indwelling needle implant assembly (4) further comprises an inner sleeve (47) which is clamped on the top of the indwelling needle catheter seat (42); the inner cavity of the inner sleeve (47) is provided with a steel needle seat (474); a return spring (478) is sleeved inside the steel needle seat (474); a stainless steel needle (479) is fixed in the middle of the steel needle seat (474); and the indwelling needle catheter (421) is provided outside the stainless steel needle (479); The outer portion of the inner sleeve (47) is slidably provided with an outer sleeve (44), the outer portion of the outer sleeve (44) is rotatably sleeved with a rotating handle (43), and the outer surface of the outer sleeve (44) is clamped with a safety ring (46), the rotating handle (43) is clamped with the indwelling needle catheter seat (42), and the outer portion of the inner sleeve (47) is sleeved with an implant spring (473); A fixing block (424) is provided on the top outer surface of the indwelling needle catheter seat (42); The hydraulic fluid supply chamber (17) is evacuated to form a negative pressure, and then the needle tip of the liquid-filled injection needle (2) is pierced through the heparin cap (11). Under the action of the external atmospheric pressure, the drug driving fluid is pressed into the hydraulic fluid supply chamber (17) and squeezes the push unit piston (171) to move to one side, thereby increasing the volume of the hydraulic fluid supply chamber (17); Initially, the indwelling needle catheter seat (42) is locked by the rotating handle (43), and the implantation spring (473) is in a compressed state at this time. Then, the safety ring (46) is pushed upward, and then the handle (43) is rotated. At this time, the locking limit of the rotating handle (43) and the indwelling needle catheter seat (42) is released, and the implantation spring (473) pushes the indwelling needle catheter seat (42) to be locked into the convex ring cavity (41), thereby completing the stainless steel needle and the indwelling needle catheter (421) being inserted into the blood vessel together. When the indwelling needle catheter (421) is successfully sent into the blood vessel, the stainless steel needle is withdrawn, leaving only the soft indwelling needle catheter (421) in the blood vessel, and the injection liquid in the indwelling needle catheter seat (42) is injected through the indwelling needle catheter (421), thereby reducing the discomfort and pain caused to the patient; Two connecting pins (442) are fixedly provided on the locking seat on the inner wall of the outer sleeve (44), and a slideway (471) for sliding corresponding to the connecting pin (442) is provided on the outer wall of the inner sleeve (47), and an inclined receiving groove is provided at the end of each slideway (471), and one end of the implant spring (473) is fixed to the locking seat; Two connecting pins (475) are installed on the outer wall surface of the end of the steel needle seat (474), and a straight slide groove (472) is provided on the side of the outer wall surface of the inner sleeve (47) adjacent to the slideway (471). The end of the straight slide groove (472) is provided with an elastic inclined protrusion (477) that is engaged with the fixed block (424). There are two straight slide grooves (472), and the inner wall surface of the straight slide groove (472) is provided with a card groove (476); Initially, the second connecting pin (475) is locked by the slot (476), and after the first connecting pin (442) enters the receiving slot from the slideway (471), the inner sleeve (47) rotates, and the second connecting pin (475) is disengaged from the slot (476), and then the return spring (478) pushes the steel needle seat (474) to slide in the straight slide groove (472) to retract the tip of the stainless steel needle (479) from the indwelling needle catheter (421); A flow hole (422) is provided on one side surface of the indwelling needle catheter seat (42), and a sealing rubber cap (423) is embedded and installed on the upper surface of the indwelling needle catheter seat (42), and two lugs (425) are symmetrically provided on the outside of the indwelling needle catheter seat (42); A Luer needle seat (14) is installed on the inner wall surface of the infusion tank, one end of the Luer needle seat (14) is connected to an infusion tube (141), and the infusion tube (141) is communicated with the flow hole (422); The cartridge bottle (13) is provided with a piston member movably disposed inside, and one end of the cartridge bottle (13) close to the mounting seat (131) is set to be open, and a sealing rubber plug is sleeved on the outside of the liquid outlet end of the mounting seat (131), and the sealing rubber plug contacts the inner wall surface of the open end of the cartridge bottle (13), and a Luer bottle plug is installed on one end of the cartridge bottle (13) close to the Luer needle seat (14), and the needle on the Luer needle seat (14) pierces the Luer bottle plug and enters the interior of the cartridge bottle (13); The outer surface of the outer sheath (44) is provided with a movable groove (441) for use with the convex strip in the rotating handle (43), the end of the movable groove (441) is provided with a locking groove for use with the safety ring (46), the lower surface of the safety ring (46) is provided with a groove for use with the convex strip on the inner wall surface of the rotating handle (43), and the end of the rotating handle (43) is provided with a blocking block (431), and the blocking block (431) is in clamping contact with the lug (425).

2. A high-precision chip-type micropump wearable precision syringe according to claim 1, characterized in that: The micropump unit (15) comprises a chip pump module (153), a micropump control board (152) is provided on the upper surface of the chip pump module (153), a piezoelectric swing arm (154) made of piezoelectric ceramics is provided on one side of the chip pump module (153), and a Bluetooth module (151) is provided on the upper surface of the micropump control board (152).

3. A high-precision chip-type micropump wearable precision syringe according to claim 1, characterized in that: A battery (16) is installed inside the power supply control compartment, and a control circuit board (161) is provided on the upper surface of the battery (16). One end of the control circuit board (161) is extended and installed in the control compartment. The upper surface of one injection box body (1) is set as a closed structure, and the upper surfaces of the control compartment, micro pump compartment and semi-clamping compartment one of the other injection box body (1) are provided with the same cover plate, and a liquid level sensor used in conjunction with the cartridge bottle (13) is fixed on the inner wall of the semi-clamping compartment one.

4. A high-precision chip-type micropump wearable precision syringe according to claim 1, characterized in that: The bonding unit comprises a coating layer (12) matched with the bottom surface of the injection box body (1), a protective film (122) is bonded to the lower surface of the coating layer (12), and a through groove (121) communicating with the convex ring cavity (41) is provided on the coating layer (12).

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