Disposable multi-dose high-precision insulin injection apparatus

Abstract

Disclosed is a disposable multi-dose high-precision insulin injection apparatus, comprising a housing, and a dose adjustment unit and an injection transmission unit that are arranged in the housing. The dose adjustment unit is arranged in the upper part in the housing, and the injection transmission unit is arranged in the lower part in the housing. A dose setting unit is in transmission connection with the injection transmission unit. The dose adjustment unit is used for presetting an injection dose, and the injection transmission unit is used for transmitting injection power and discharging the preset injection dose to complete an injection. The disposable multi-dose high-precision insulin injection apparatus described in the present invention uses the dose setting unit to set a dose of insulin to be injected and uses the injection transmission unit to complete the injection of the corresponding dose. The dose setting unit can accurately set a dose to be injected. The apparatus is simple and convenient to operate and cost-effective.

Description

Multi-dose high-precision insulin disposable injection device TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more specifically, the present application relates to a multi-dose high-precision insulin disposable injection device. BACKGROUND

[0002] Insulin is a protein hormone that mainly regulates sugar metabolism to maintain blood sugar levels in the human body. For diabetic patients, insulin injection is one of the important means for them to control blood sugar. With the development of science and technology, insulin injection equipment has also made great progress, from the initial syringe to the later insulin pump, and now to the high-precision insulin injection pen, the precision and convenience of insulin injection equipment have been greatly improved.

[0003] The existing insulin injection equipment mainly has two kinds, one is insulin pump, and the other is insulin injection pen. The insulin pump is a device that simulates the secretion of insulin by the human pancreas, which can automatically adjust the injection amount and time of insulin by setting the program, and has high precision and convenience. However, the price of insulin pump is high, and it needs to replace the battery and insulin storage tube regularly, so the maintenance cost is high. The insulin injection pen is a manually operated device, and the patient needs to manually adjust the injection amount of insulin according to his own blood sugar level. Although the price of insulin injection pen is low, the maintenance cost is also relatively low, but its precision is relatively low, and the operation is complex, which is not easy for patients to master.

[0004] Patent document CN117545520A discloses a single-dose injection device, which discharges a single dose of a predetermined fixed volume using an embedded cartridge, wherein the piston rod has a predetermined travel distance, and wherein the travel distance of the piston rod relative to the position of the fixed cartridge housing structure can be individually adjusted for each individual injection device.

[0005] The existing insulin injection device, although the insulin pump has high precision, but the price is high, the maintenance cost is also high, which is not conducive to the long-term use of ordinary patients, and the precision of the insulin injection pen is low.

[0006] Therefore, it is necessary to propose a multi-dose high-precision insulin disposable injection device to solve the problems existing in the prior art.

[0007] SUMMARY

[0008] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to attempt to define the key features and essential technical features of the claimed technical solutions, nor to attempt to determine the protection scope of the claimed technical solutions.

[0009] In order to solve the above problems, the present application provides a multi-dose high-precision insulin disposable injection device, which comprises a shell, a dose adjusting unit and an injection transmission unit arranged in the shell, the dose adjusting unit is arranged in the upper part of the shell, the injection transmission unit is arranged in the lower part of the shell, the dose adjusting unit is in transmission connection with the injection transmission unit, the dose adjusting unit is used for presetting the injection dose, and the injection transmission unit is used for transmitting the injection power to discharge the preset injection dose and complete the injection.

[0010] Preferably, the dose adjusting unit comprises a dose adjusting knob, a window fixing member and an upper rotating member, the window fixing member is fixedly arranged in the upper part of the shell, a thread is arranged on the inner circumference of the window fixing member, the dose adjusting knob is movably arranged in the window fixing member, the dose adjusting knob comprises a cylindrical part and a knob part, a thread groove is formed on the outer circumferential surface of the cylindrical part, and the thread groove is in matched connection with the thread;

[0011] The upper rotating member is movably arranged in the dose adjusting knob, an annular tooth is arranged on the lower end surface of the upper rotating member in the circumferential direction, an end surface tooth ring is arranged on the lower part of the cylindrical part opposite to the annular tooth, the annular tooth jumps on the end surface tooth ring when the dose adjusting knob rotates to preset the injection dose, and the upper rotating member and the dose adjusting knob are locked through the annular tooth and the end surface tooth ring during injection.

[0012] Preferably, the injection transmission unit comprises a one-way rotating shaft movably arranged in the upper rotating member, an elastic arm is arranged on the outer circumferential surface of the lower part of the one-way rotating shaft, a one-way tooth ring is arranged on the inner circumference of the shell at a position corresponding to the elastic arm, and the one-way tooth ring is in clamping connection with the elastic arm;

[0013] A screw rod is movably arranged in the one-way rotating shaft, a threaded hole is arranged on the lower part of the shell, the screw rod is in threaded connection with the threaded hole, the one-way rotating shaft limits the rotation of the upper rotating member when the dose adjusting knob rotates to preset the injection dose, and the one-way rotating shaft drives the screw rod to rotate during injection.

[0014] Preferably, a limiting strip extending in the axial direction of the one-way rotating shaft is arranged on the inner circumferential surface of the one-way rotating shaft, a limiting groove is formed on the outer circumferential surface of the screw rod at a position corresponding to the limiting strip, and the limiting strip is movably arranged in the limiting groove.

[0015] Preferably, the tail of the screw is provided with a tail plate, a clamping groove is arranged on the inner circumferential surface of the one-way rotating shaft and spaced from the limiting strip, the protrusion on the side surface of the tail plate is slidingly arranged in the clamping groove, a hole penetrating through the side wall of the one-way rotating shaft is formed in the lower part of the one-way rotating shaft, the hole is communicated with the clamping groove, a resilient plate is arranged on the upper side wall of the hole, and a clamping hole is formed in the side wall of the upper rotating member at a position corresponding to the resilient plate.

[0016] Preferably, the upper part of the dose adjusting knob is slidingly provided with a top button, and a spring is arranged between the top button and the upper rotating member.

[0017] Preferably, a dose scale is drawn on the outer circumference of the cylindrical part of the dose adjusting knob, a first window is formed in the upper part of the shell, a second window is formed in the viewing window fixing member at a position corresponding to the first window, and an indicating block is arranged on the lower side wall of the second window.

[0018] Preferably, the dose scale is arranged in a spiral shape on the outer circumferential surface of the cylindrical part, and the spiral shape of the dose scale is consistent with the spiral shape of the thread.

[0019] Preferably, an annular protrusion is arranged above the one-way gear ring on the inner circumferential surface of the shell, the annular protrusion is clamped with the lower pressing plate, and the one-way rotating shaft is rotationally connected with the lower pressing plate through the central hole of the lower pressing plate.

[0020] Preferably, the device further comprises a liquid medicine unit, the liquid medicine unit comprises a clamp bottle sleeve, the clamp bottle sleeve is clamped in the lower part of the shell, and the clamp bottle is fixedly arranged in the clamp bottle sleeve.

[0021] Compared with the prior art, the present application has at least the following beneficial effects:

[0022] The multi-dose high-precision insulin disposable injection device sets the dose of insulin to be injected by using the dose setting unit, and completes the injection of the corresponding dose by using the injection transmission unit. The dose setting unit can accurately set the dose to be injected, and the operation is simple and the cost is low.

[0023] The multi-dose high-precision insulin disposable injection device has other advantages, objects and features, which will be partially embodied through the following description, and partially understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0025] Fig. 1 is a structural schematic view of the multi-dose high-precision insulin disposable injection device disclosed by the present application;

[0026] Figure 2 is a structural schematic diagram of the multi-dose high-precision insulin disposable injection device after dose adjustment according to the present disclosure;

[0027] Figure 3 is an exploded structural schematic diagram of the multi-dose high-precision insulin disposable injection device according to the present disclosure;

[0028] Figure 4 is a structural schematic diagram of the dose adjustment unit and the injection transmission unit according to the present disclosure;

[0029] Figure 5 is a structural schematic diagram of the window fixing member according to the present disclosure;

[0030] Figure 6 is a structural schematic diagram of the dose adjustment knob according to the present disclosure;

[0031] Figure 7 is a structural schematic diagram of the dose adjustment knob according to the present disclosure;

[0032] Figure 8 is a structural schematic diagram of the upper rotating member according to the present disclosure;

[0033] Figure 9 is a structural schematic diagram of the upper rotating member according to the present disclosure;

[0034] Figure 10 is a structural schematic diagram of the housing according to the present disclosure;

[0035] Figure 11 is a structural schematic diagram of the one-way rotating shaft according to the present disclosure;

[0036] Figure 12 is a structural schematic diagram of the one-way rotating shaft according to the present disclosure;

[0037] Figure 13 is a structural schematic diagram of the screw rod according to the present disclosure;

[0038] Figure 14 is a structural schematic diagram of the top button according to the present disclosure;

[0039] Figure 15 is a structural schematic diagram of the needle storage unit according to the present disclosure;

[0040] Figure 16 is an enlarged structural schematic diagram of the part A of Figure 15;

[0041] Figure 17 is a structural schematic diagram of the needle storage unit according to the present disclosure;

[0042] Figure 18 is a structural schematic diagram of the needle tip provided with a blood glucose sensor according to the present disclosure.

[0043] Wherein: 1, shell, 101, one-way gear ring, 102, threaded hole, 103, annular protrusion, 104, first window, 2, dose adjustment knob, 201, cylindrical part, 202, knob part, 2011, threaded groove, 2012, end face tooth ring, 2013, dose scale, 3, window fixing piece, 301, thread, 302, second window, 303, indicating block, 4, upper rotating part, 401, annular tooth, 402, convex strip, 403, clamping hole, 404, connecting column, 5, one-way rotating shaft, 501, elastic arm, 502, limiting strip, 503, clamping groove, 504, hole, 505, elastic plate, 6, screw, 601, limiting groove, 602, tail plate, 6021, protruding block, 603, connecting ball, 7, top button, 701, pressing column, 8, spring, 9, cassette bottle cover, 10, cassette bottle, 11, lower pressing plate, 12, rubber cap, 13, rubber plug, 14, rubber plug pad, 15, pen shell, 16, shell, 161, cylindrical part, 17, annular plate, 18, clamping jaw, 181, wedge-shaped groove, 19, limiting block, 20, limiting groove, 21, limiting protrusion, 22, long hole, 23, handle, 24, sealing cover, 25, main body, 26, needle tip, 27, blood glucose sensor, 28, annular groove, 100, needle. DETAILED DESCRIPTION

[0044] The application will be further described in conjunction with the drawings and examples, so that those skilled in the art can implement the application according to the description.

[0045] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0046] As shown in FIGS. 1-14, the present application provides a multi-dose high-precision insulin disposable injection device, which comprises a shell 1 and a dose adjustment unit and an injection transmission unit arranged in the shell 1, the dose adjustment unit is arranged in the upper part of the shell, the injection transmission unit is arranged in the lower part of the shell 1, the dose adjustment unit and the injection transmission unit are in transmission connection, the dose adjustment unit is used for presetting the injection dose, and the injection transmission unit is used for transmitting the injection power to discharge the preset injection dose and complete the injection.

[0047] Further, the dose adjustment unit comprises a dose adjustment knob 2, a window fixing piece 3 and an upper rotating part 4, the window fixing piece 3 is fixedly arranged in the upper part of the shell 1, threads 301 are arranged on the inner circumference of the window fixing piece 3, the dose adjustment knob 2 is movably arranged in the window fixing piece 3, the dose adjustment knob 2 comprises a cylindrical part 201 and a knob part 202, threaded grooves 2011 are formed on the outer circumferential surface of the cylindrical part 201, and the threaded grooves 2011 are in matched connection with the threads 301;

[0048] The upper rotating part 4 is movably arranged in the dose adjusting knob 2, and an annular tooth 401 is arranged on the lower end surface of the upper rotating part 4 in the circumferential direction. An end surface tooth ring 2012 is arranged at the lower part of the cylindrical part 201 opposite to the annular tooth 401. When the dose adjusting knob 2 is rotated to a preset injection dose, the annular tooth 401 jumps on the end surface tooth ring 2012. When injection is performed, the upper rotating part 4 is locked with the dose adjusting knob 2 through the annular tooth 401 and the end surface tooth ring 2012.

[0049] Further, the injection transmission unit comprises a one-way rotating shaft 5 movably arranged in the upper rotating part 4. An elastic arm 501 is arranged on the outer circumferential surface of the lower part of the one-way rotating shaft 5. A one-way tooth ring 101 is arranged on the inner circumferential surface of the shell 1 at a position corresponding to the elastic arm 501. The one-way tooth ring 101 is clamped with the elastic arm 501.

[0050] The screw rod 6 is movably arranged in the one-way rotating shaft 5. A threaded hole 102 is arranged at the lower part of the shell 1. The screw rod 6 is screwed with the threaded hole 102. When the dose adjusting knob 2 is rotated to a preset injection dose, the one-way rotating shaft 5 limits the rotation of the upper rotating part 4. When injection is performed, the one-way rotating shaft 5 drives the screw rod 6 to rotate.

[0051] Further, a limiting strip 502 extending along the axial direction of the one-way rotating shaft 5 is arranged on the inner circumferential surface of the one-way rotating shaft 5. A limiting groove 601 is formed on the outer circumferential surface of the screw rod 6 at a position corresponding to the limiting strip 502. The limiting strip 502 is movably arranged in the limiting groove 601.

[0052] Further, a tail plate 602 is arranged at the tail of the screw rod 6. A clamping groove 503 is arranged on the inner circumferential surface of the one-way rotating shaft 5 at a position spaced from the limiting strip 502. A protrusion 6021 on the side surface of the tail plate 602 is movably arranged in the clamping groove 503. A hole 504 penetrating the side wall of the one-way rotating shaft 5 is formed at the lower part of the one-way rotating shaft 5. The hole 504 is in communication with the clamping groove 503. A resilient plate 505 is arranged on the upper side wall of the hole 504. A clamping hole 403 is formed on the side wall of the upper rotating part 4 at a position corresponding to the resilient plate 505. The end of the resilient plate 505 is wedge-shaped.

[0053] Further, a top button 7 is movably arranged at the upper part of the dose adjusting knob 2. A spring 8 is arranged between the top button 7 and the upper rotating part 4.

[0054] Further, a dose scale 2013 is drawn on the outer circumferential surface of the cylindrical part 201 of the dose adjusting knob 2. A first window 104 is formed at the upper part of the shell 1. A second window 302 is formed on the viewing window fixing part 3 at a position corresponding to the first window 104. An indicating block 303 is arranged on the lower side wall of the second window 302.

[0055] Further, the dose marks 2013 are arranged in a spiral shape on the outer circumferential surface of the cylindrical portion 201, and the spiral shape of the dose marks 2013 is consistent with the spiral shape of the screw thread 301.

[0056] Further, the annular protrusion 103 is arranged above the one-way gear ring 101 on the inner circumferential surface of the shell 1, the lower pressing plate 11 is clamped on the annular protrusion 103, and the one-way rotating shaft 5 is rotatably connected with the lower pressing plate 11 through the central hole of the lower pressing plate 11.

[0057] Further, the liquid medicine unit is further included, the liquid medicine unit includes the cassette bottle sleeve 9, the cassette bottle sleeve 9 is clamped in the lower portion of the shell 1, and the cassette bottle 10 is fixedly arranged in the cassette bottle sleeve 9.

[0058] The working principle of the above technical scheme is as follows: the multi-dose high-precision insulin disposable injection device disclosed by the application can be operated by the patient to complete injection, including preparation before injection, injection dose setting and injection:

[0059] Preparation before injection:

[0060] Assembling the needle: before injection, the patient needs to prepare the injection needle and sterilized alcohol, then remove the pen shell, and sterilize the needle part at the bottom of the cassette bottle with alcohol or other methods, after sterilization, remove the needle and assemble the needle on the manual insulin injection pen.

[0061] Exhaust: when there is air in the insulin liquid medicine in the cassette bottle, first adjust the dose adjusting knob 2 upwards, according to the amount of air in the cassette bottle, adjust the dose adjusting knob 2 to extend upwards, after adjustment, press the top button 7 on the upper part of the injection pen, so that the air in the cassette bottle is exhausted and the dose adjusting knob 2 is reset, so that the indicating block 303 on the window fixing piece 3 is aligned with the zero dose of the dose mark 2013.

[0062] Dose adjustment:

[0063] First, the dose knob 2 on the top of the manual insulin injection pen is adjusted by hand. When adjusting the dose, rotate the dose knob 2 clockwise, and the upper rotating member 4 is driven to rotate upward. The upper rotating member 4 can only slide along the axis direction between the upper rotating member 4 and the one-way rotating shaft 5. The elastic arm 501 at the lower end of the one-way rotating shaft 5 and the one-way gear ring 101 make the one-way rotating shaft 5 only rotate counterclockwise and not clockwise. The movement direction of the upper rotating member 4 is up and down sliding. The annular teeth 401 on the lower end surface of the upper rotating member 4 and the end face tooth ring 2012 on the lower part of the dose knob 2 are engaged with each other, so the dose adjustment member rotates clockwise. When the dose knob 2 rotates, the upper rotating member is lifted upward by the spring 8, so that the annular teeth 401 of the upper rotating member are separated from the end face tooth ring 2012 on the lower part of the dose knob 2 and jump up and down, and under the pressure of the spring 8, a click sound and a hand feeling are emitted. According to the corresponding position of the indicating block 303 on the window fixing member 3 and the dose scale 2013, when the patient adjusts to the required dose, the end face tooth ring 2012 on the lower part of the dose knob 2 and the annular teeth 401 of the upper rotating member 4 stop rotating and engage with each other. The dose knob 2 extends upward in the window fixing member 3 (as shown in FIG. 2), and the lower end surface of the knob part 202 of the dose knob 2 is separated from the upper end surface of the shell 1 by a certain distance. Different dose adjustments, the lower end surface of the knob part 202 and the upper end surface of the shell 1 are different distances.

[0064] The clockwise and counterclockwise directions of the rotation direction of the dose knob 2 refer to the direction of the rotation of the dose knob 2 when viewed from above the top button 7 of the injection device.

[0065] The one-way rotating shaft 5 is cylindrical, and the one-way rotating shaft 5 slides in the upper rotating member 4 along the axis direction of the upper rotating member 4. The convex strip 402 is fixedly arranged on the inner circumferential surface of the upper rotating member 4 along the axis direction of the upper rotating member 4. The outer circumferential surface of the one-way rotating shaft 5 is provided with a groove corresponding to the convex strip 402. The convex strip 402 is slidably arranged in the groove, and the groove is arranged between the hole 504.

[0066] Injection:

[0067] When the patient injects, the injection site is sterilized with alcohol or other means, and the protective cover of the needle is removed by hand and the needle is exposed. The needle is inserted into the injection site, and the top button 7 on the upper part of the manual injection device is pressed by hand. The spring 8 is compressed, the pressing column 701 in the top button 7 contacts the connecting column 404 on the top of the upper rotating piece 4 and transmits force to the upper rotating piece 4. At this time, the annular teeth 401 on the lower end of the upper rotating piece 4 engage with the end face tooth ring 2012 on the lower part of the dose adjusting knob 2 and are pressed downward. At this time, the dose adjusting knob 2 is rotated counterclockwise and moves downward under the action of the screw groove 2011 and the screw thread 301. Since the one-way rotating shaft 5 can only rotate counterclockwise and cannot rotate clockwise, the upper rotating piece 4 drives the one-way rotating shaft 5 to rotate, and the one-way rotating shaft 5 drives the screw rod 6 to rotate. At this time, the elastic arm 501 on the lower end of the one-way rotating shaft 5 jumps and makes a clicking sound. The screw rod 6 rotates in the threaded hole 102 and moves downward. The rubber plug pad 14 connected to the connecting ball 603 on the lower end of the screw rod 6 pushes the rubber plug 13 in the cartridge. The outer shell is not moved when it is held by hand. The screw rod 6 pushes the rubber plug pad 14 to push the rubber plug 13 and accurately inject the liquid medicine into the patient's body. After the injection is completed, the injection device needs to be pressed for more than 5 seconds. The main reason is to ensure that the liquid medicine is completely injected into the patient's body, and to prevent the blood in the patient's body from flowing back into the injection pen. At this time, the injection of the set injection dose is completed.

[0068] The rubber cap 12 is arranged at the opening of the far end of the cartridge 10 away from the rubber plug 13. The rubber cap 12 is used to seal the cartridge. When the injection is performed, the rear end of the needle tip 26 pierces the rubber cap and enters the cartridge. After the injection is completed, the rubber cap 12 is used to close the hole pierced by the needle tip.

[0069] The end face tooth ring refers to a plurality of teeth arranged along the circumferential direction on an end face of a ring-shaped base body. The tooth tips of the plurality of teeth pass through the center line of the ring-shaped base body.

[0070] The pitch of the threaded hole 102 is the same as the pitch of the screw thread 301.

[0071] When the dose adjusting knob 2 rotates to the preset injection dose, the annular teeth 401 jump on the end face tooth ring 2012. When the injection is performed, the upper rotating piece 4 is locked by the annular teeth 401 and the end face tooth ring 2012 under the pressure of the top button 7. The upper rotating piece 4 and the dose adjusting knob 2 remain fixed.

[0072] Needle removal: After the injection is completed and stays for more than 5 seconds, the injection pen is removed. The protective cover of the needle just removed is covered again. The injection needle is twisted by hand and placed in the needle storage unit after being twisted. The pen shell is covered, and the insulin injection device is placed in a safe position.

[0073] The screw rod 6 moves downwards by a certain distance each time of injection, and after multiple uses, the tail plate 602 on the tail of the screw rod 6 is slid to the position of the elastic plate 505, the protrusions 6021 on the two side walls of the tail plate 602 extrude the wedge at the end of the elastic plate 505, the elastic plate 505 is extruded and moved outward to the inside of the clamping hole 403 of the upper rotating piece 4, the end of the elastic plate 505 is clamped on the lower side wall of the clamping hole 403, the dose adjusting knob 2 and the upper rotating piece 4 cannot be moved upwards any more and are locked, so that the dose adjusting cannot be performed any more and it is indicated that the medicine in the cartridge bottle has been used up.

[0074] The beneficial effects of the above technical solution are:

[0075] The multi-dose high-precision insulin disposable injection device sets the dose of insulin to be injected by the dose setting unit, and completes the injection of the corresponding dose by using the injection transmission unit.

[0076] In one embodiment, as shown in Figures 15-17, the top of the pen shell is provided with a needle storage unit, the pen shell 15 is sleeved on the outside of the cartridge bottle outer sleeve 9 to play a protective role, and the needle storage unit is arranged on the top of the pen shell 15 for placing the needle 16. The needle storage unit comprises a shell 16 fixedly arranged on the top wall of the pen shell 15, the shell 16 comprises a cylindrical portion 161, a tapered cylinder portion and a needle cylinder portion, an annular plate 17 is slidably arranged in the cylindrical portion 161, at least two clamping jaws 18 are arranged in a circumferential array on the upper end face of the annular plate 17, a wedge-shaped groove 181 is formed in the side wall of the clamping jaw 18 away from the center of the annular plate 17, the width of the lower end of the wedge-shaped groove 181 is greater than the width of the upper end, a limiting block 19 is fixedly arranged on the inner wall of the cylindrical portion 161 at a position corresponding to the wedge-shaped groove 171, and the wedge-shaped groove 171 and the limiting block 19 are in sliding connection.

[0077] A limiting groove 20 is formed in the inner wall of the cylindrical portion 161 along the axial direction of the cylinder, and a limiting protrusion 21 is fixedly arranged on the outer circumference of the annular plate 17 at a position corresponding to the limiting groove 20, and the limiting protrusion 21 and the limiting groove 20 are in sliding connection.

[0078] A long hole 22 penetrating through the side wall of the cylindrical portion 161 is formed in the side wall of the cylindrical portion 161, and a handle 23 is fixedly arranged on the outer circumference of the annular plate 17 at a position corresponding to the long hole 22, the handle 23 is slidably arranged in the long hole 22, and the long hole 22 is parallel to the axial direction of the cylindrical portion 161.

[0079] A sealing cover 24 is detachably arranged at the opening of the cylindrical portion 161.

[0080] The working principle of the above technical solution is as follows:

[0081] Since the insulin liquid in the vial can be used for multiple times, after one injection, the needle 100 needs to be removed from the injection device and stored separately. If the needle 100 is kept on the insulin injection device, the needle 16 is in communication with the liquid in the vial, which can cause the liquid in the vial to be lost, and it is also not safe when the pen shell 15 is opened.

[0082] If the needle 100 is stored separately, the needle 100 can be separated from the insulin injection device before injection, and the needle can be lost. Therefore, a needle storage unit is arranged on the top of the pen shell 15 of the insulin injection device. The needle storage unit includes a shell 16 fixedly arranged on the top wall of the pen shell 15. The shell 16 includes a cylindrical portion 161, a tapered cylinder portion, and a needle cylinder portion. An annular plate 17 is slidably arranged in the cylindrical portion 161. At least two clamping claws 18 are arranged in a circular array on the upper end face of the annular plate 17. A wedge-shaped groove 181 is formed in the side wall of the clamping claw 18 away from the center of the annular plate 17. The width of the lower end of the wedge-shaped groove 181 is greater than the width of the upper end. A limiting block 18 is fixedly arranged on the inner wall of the cylindrical portion 161 at a position corresponding to the wedge-shaped groove 171. The wedge-shaped groove 171 and the limiting block 18 are in sliding connection.

[0083] When storing the needle 16, the sealing cover 22 is opened, and the handle 23 is pushed upward to move the annular plate 17 upward. Since the width of the upper end of the wedge-shaped groove 181 of the clamping claw 18 on the annular plate 17 is smaller than the width of the lower end, when the annular plate 17 is moved to the uppermost position, the limiting block 19 no longer presses the clamping claw 18, so that the clamping claw 18 moves away from the center axis of the cylindrical portion 161. The main body portion 25 of the needle 100 can enter the middle of the clamping claw 18. The lower end face of the needle 100 is in contact with the upper end face of the annular plate 17, and the needle tip 26 of the needle 100 penetrates through the hole of the annular plate 17. At this time, the needle 100 is pressed downward or the handle 23 is pushed downward, so that the needle 100 and the annular plate 17 move downward together. The wedge-shaped groove of the clamping claw 18 that moves downward together with the annular plate 17 is gradually pressed by the limiting block 19 during the movement, so that the upper end of the limiting block 19 moves toward the center axis of the cylindrical portion 161. After the annular plate and the needle are moved to the position, the upper end of the clamping claw 18 is pressed against the outer wall of the main body portion 25 of the needle, so that the needle is kept stable. At this time, the needle tip 26 is located in the needle cylinder portion of the shell 16. Then, the sealing cover 24 is covered, the pen shell 15 is covered, and the insulin injection device is stored.

[0084] By arranging the handle 23 to control the up-and-down movement of the annular plate 17, the storage and taking-out of the needle are facilitated.

[0085] A disinfecting cotton can also be arranged in the needle cylinder portion, so that alcohol is kept in the disinfecting cotton. After the needle 100 is put into the needle storage unit, the disinfecting cotton can disinfect the needle tip.

[0086] The beneficial effects of the above technical solutions are:

[0087] The top of the pen shell is provided with a needle storage unit. After one injection is completed, the needle is removed and placed in the needle storage unit, and the needle is fixed and sealed with a sealing cover to prevent the needle from being contaminated. The needle and the insulin injection device can be placed together to prevent the needle from being lost during the next injection.

[0088] In one embodiment, as shown in FIG. 18, a blood glucose sensor 27 is arranged on the needle tip 26 of the needle 100, an annular groove 28 is formed on the outer circumferential surface of the needle tip 26, and the blood glucose sensor 27 is fixedly arranged in the annular groove 28. The blood glucose sensor 27 is electrically connected to the processing unit, and the processing unit is fixedly arranged on the main body 25 of the needle 100. The processing unit is wirelessly connected to the display, and the display is fixedly arranged on the pen shell 15.

[0089] The processing unit includes an information receiving module, a processor, and a wireless communication module. The information receiving module is electrically connected to the blood glucose sensor 27, the processor is electrically connected to the information receiving module and the wireless communication module, and the wireless communication module is wirelessly connected to the display. The processor has a blood glucose prediction model preset therein, which predicts the blood glucose value at the next injection time according to historical data. The processor also has a blood glucose value and insulin injection dose database preset therein. When the patient injects insulin, the processor predicts the blood glucose value at the next injection time according to the blood glucose value detected by the blood glucose sensor and the historical blood glucose value data stored in the processor memory, and compares it with the database to give the insulin injection dose at the next injection and display it on the display.

[0090] The working principle of the above technical solution is as follows:

[0091] In the prior art, blood glucose value monitoring is mostly performed by non-invasive or implantation methods. Non-invasive monitoring has low accuracy, and implantable monitoring requires the patient to implant a blood glucose monitoring electrode in the body, which causes discomfort to the patient. The blood glucose sensor is fixedly arranged on the needle tip 26 of the needle, and the blood glucose of the patient is detected during insulin injection. The data is accurate and does not require the patient to implant a blood glucose electrode. The blood glucose prediction model of the processor predicts the blood glucose value of the patient at the next injection time according to the detected blood glucose value and historical value, and gives the dose of insulin for the next injection, thereby improving the accuracy of the insulin injection dose. The blood glucose prediction model can be determined according to the blood glucose prediction method in the prior art, such as CN117612737A, which will not be described here.

[0092] The above technical solution has the following beneficial effects:

[0093] The sensor is arranged on the needle tip to directly detect the blood glucose value in the blood of the patient, the detected blood glucose value of the patient is accurate, the discomfort caused by long-term carrying of the implantable blood glucose meter by the patient can be avoided, the dose of the injected insulin is determined according to the detected blood glucose value, and the accuracy of the dose of the injected insulin is improved.

[0094] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0095] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0096] Although the embodiments of the present application have been disclosed as above, it is not limited to only the applications listed in the specification and embodiments, and it can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, therefore, the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A multi-dose high precision insulin disposable injection device characterized in that, The injection device comprises a housing (1) and a dose setting unit and an injection transmission unit arranged in the housing (1), the dose setting unit is arranged in the upper part of the housing, the injection transmission unit is arranged in the lower part of the housing (1), the dose setting unit is in transmission connection with the injection transmission unit, the dose setting unit is used for presetting an injection dose, and the injection transmission unit is used for transmitting an injection power to discharge the preset injection dose and complete the injection.

2. The multi-dose high precision insulin disposable injection device of claim 1, wherein, The dose setting unit comprises a dose setting knob (2), a window fixing part (3) and an upper rotating part (4), the window fixing part (3) is fixedly arranged in the upper part of the housing (1), a thread (301) is arranged on the inner circumference of the window fixing part (3), the dose setting knob (2) is movably arranged in the window fixing part (3), the dose setting knob (2) comprises a cylindrical part (201) and a knob part (202), a thread groove (2011) is formed on the outer circumferential surface of the cylindrical part (201), and the thread groove (2011) is in matched connection with the thread (301); The upper rotating part (4) is movably arranged in the dose setting knob (2), an annular tooth (401) is arranged on the lower end surface of the upper rotating part (4) in the circumferential direction, an end surface tooth ring (2012) is arranged at the lower part of the cylindrical part (201) and opposite to the annular tooth (401), when the dose setting knob (2) rotates to preset an injection dose, the annular tooth (401) jumps on the end surface tooth ring (2012), and when injection is performed, the upper rotating part (4) and the dose setting knob (2) are locked through the annular tooth (401) and the end surface tooth ring (2012).

3. The multi-dose high precision insulin disposable injection device of claim 2, wherein, The injection transmission unit comprises a one-way rotating shaft (5) movably arranged in the upper rotating part (4), an elastic arm (501) is arranged on the outer circumferential surface of the lower part of the one-way rotating shaft (5), a one-way tooth ring (101) is arranged on the inner circumference of the housing (1) and corresponds to the elastic arm (501), and the one-way tooth ring (101) is in clamping connection with the elastic arm (501); The one-way rotating shaft (5) movably arranges a screw rod (6) in the one-way rotating shaft (5), a threaded hole (102) is arranged at the lower part of the housing (1), the screw rod (6) is in threaded connection with the threaded hole (102), when the dose setting knob (2) rotates to preset an injection dose, the one-way rotating shaft (5) limits the rotation of the upper rotating part (4), and when injection is performed, the one-way rotating shaft (5) drives the screw rod (6) to rotate.

4. The multi-dose high precision insulin disposable injection device of claim 3, wherein, A limiting strip (502) extending in the axial direction of the one-way rotating shaft (5) is arranged on the inner circumferential surface of the one-way rotating shaft (5), a limiting groove (601) is formed on the outer circumferential surface of the screw rod (6) and corresponds to the limiting strip (502), and the limiting strip (502) is movably arranged in the limiting groove (601).

5. The multi-dose high precision insulin disposable injection device of claim 4, wherein, The tail of the screw rod (6) is provided with a tail plate (602), a clamping groove (503) is arranged on the inner circumferential surface of the one-way rotating shaft (5) and spaced from the limiting strip (502), the protrusion (6021) on the side surface of the tail plate (602) is slidingly arranged in the clamping groove (503), the lower part of the one-way rotating shaft (5) is provided with a hole (504) penetrating the side wall of the one-way rotating shaft (5), the hole (504) is in communication with the clamping groove (503), the upper side wall of the hole (504) is provided with an elastic plate (505), the side wall of the upper rotating part (4) is provided with a clamping hole (403) at a position corresponding to the elastic plate (505), and the end of the elastic plate (505) is wedge-shaped.

6. The multi-dose high precision insulin disposable injection device of claim 5, wherein, The upper part of the dose adjusting knob (2) is slidingly provided with a top button (7), and a spring (8) is arranged between the top button (7) and the upper rotating part (4).

7. The multi-dose high precision insulin disposable injection device of claim 6, wherein, The outer circumference of the cylindrical part (201) of the dose adjusting knob (2) is marked with a dose scale (2013), the upper part of the shell (1) is provided with a first window (104), the window fixing part (3) is provided with a second window (302) at a position corresponding to the first window (104), and the lower side wall of the second window (302) is provided with an indicating block (303).

8. The multi-dose high precision insulin disposable injection device of claim 7, wherein, The dose scale (2013) is arranged in a spiral shape on the outer circumferential surface of the cylindrical part (201), and the spiral shape of the dose scale (2013) is consistent with the spiral shape of the screw thread (301).

9. The multi-dose high precision insulin disposable injection device of claim 8, wherein, The upper part of the one-way gear ring (101) on the inner circumferential surface of the shell (1) is provided with an annular protrusion (103), the annular protrusion (103) is clamped with the lower pressing plate (11), and the one-way rotating shaft (5) is rotatably connected with the lower pressing plate (11) through the center hole of the lower pressing plate (11).

10. The multi-dose high precision insulin disposable injection device of claim 1, wherein, It also includes a medicine liquid unit, the medicine liquid unit includes a cassette bottle outer sleeve (9), the cassette bottle outer sleeve (9) is clamped in the lower part of the shell (1), and the cassette bottle (10) is fixedly arranged in the cassette bottle outer sleeve (9).

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