A multi-dose high-precision disposable insulin injection device

Abstract

The present invention discloses a multi-dose, high-precision disposable insulin injection device, comprising a housing, a dose adjustment unit, and an injection transmission unit disposed within the housing. The dose adjustment unit is disposed in the upper portion of the housing, the injection transmission unit is disposed in the lower portion of the housing, and the dose setting unit is in driving connection with the injection transmission unit. The dose adjustment unit is used to preset an injection dose, and the injection transmission unit is used to transmit injection power to discharge the preset injection dose to complete the injection. The multi-dose, high-precision disposable insulin injection device of the present invention utilizes the dose setting unit to set the desired insulin dose, and the injection transmission unit to complete the injection of the corresponding dose. The dose setting unit can accurately set the desired injection dose, is simple to operate, and is low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a multi-dose high-precision disposable insulin injection device. Background Art

[0002] Insulin is a protein hormone that primarily regulates sugar metabolism to maintain blood sugar levels. For diabetics, insulin injections are a crucial means of controlling blood sugar levels. With the advancement of technology, insulin injection devices have also made significant progress, from the initial syringe to the later insulin pump and now to the high-precision insulin pen. The accuracy and convenience of insulin injection devices have been greatly improved.

[0003] There are two main types of insulin injection devices available: an insulin pump and an insulin pen. An insulin pump simulates the secretion of insulin from the human pancreas and can automatically adjust the amount and timing of insulin injections through a programmable setting, offering high precision and convenience. However, insulin pumps are expensive and require regular replacement of batteries and insulin reservoirs, resulting in high maintenance costs. An insulin pen, on the other hand, is a manually operated device that requires patients to manually adjust the amount of insulin injected based on their blood sugar levels. Although insulin pens are relatively inexpensive and have relatively low maintenance costs, they are relatively inaccurate and complex to operate, making them difficult for patients to master.

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

[0005] Existing insulin injection devices, such as insulin pumps, have high precision, but are expensive and have high maintenance costs, making them unsuitable for long-term use by ordinary patients. Insulin injection pens, on the other hand, have low precision.

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

[0007] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0008] In order to solve the above problems, the present invention provides a multi-dose high-precision disposable insulin injection device, including a housing and a dose adjustment unit and an injection transmission unit arranged in the housing, the dose adjustment unit is arranged in the upper part of the housing, the injection transmission unit is arranged in the lower part of the housing, the dose setting unit is connected to the injection transmission unit in a transmission manner, the dose adjustment unit is used to preset the injection dose, and the injection transmission unit is used to transmit the injection power to discharge the preset injection dose to complete the injection.

[0009] Preferably, the dose adjustment unit includes a dose adjustment knob, a window fixing member, and an upper rotating member, the window fixing member being fixedly disposed at an upper portion of the housing, a thread being disposed on an inner circumference of the window fixing member, the dose adjustment knob being movably disposed within the window fixing member, the dose adjustment knob including a cylindrical portion and a knob portion, a thread groove being disposed on an outer circumferential surface of the cylindrical portion, the thread groove being engaged with the thread;

[0010] The upper rotating member is movably arranged in the dose adjustment knob, and an annular tooth is provided on the lower end surface of the upper rotating member in the circumferential direction, and an end face tooth ring is provided at the lower part of the cylindrical portion opposite to the annular tooth. When the dose adjustment knob is rotated to preset the injection dose, the annular tooth jumps on the end face tooth ring. During injection, the upper rotating member and the dose adjustment knob are locked by the annular tooth and the end face tooth ring.

[0011] Preferably, the injection transmission unit includes a one-way rotating shaft slidably arranged in the upper rotating member, an elastic arm is provided on the outer circumferential surface of the lower portion of the one-way rotating shaft, and a one-way gear ring is provided on the inner circumference of the housing at a position corresponding to the elastic arm, and the one-way gear ring is engaged with the elastic arm;

[0012] A screw is slidably arranged inside the one-way rotating shaft, and a threaded hole is arranged at the lower part of the shell. The screw is threadedly connected to the threaded hole. When the dose adjustment knob is rotated to preset the injection dose, the one-way rotating shaft limits the rotation of the upper rotating part. During injection, the one-way rotating shaft drives the screw to rotate.

[0013] Preferably, a limiting strip extending along the axial direction of the one-way rotating shaft is provided on the inner circumference of the one-way rotating shaft, a limiting groove is provided on the outer circumference of the screw at a position corresponding to the limiting strip, and the limiting strip is slidably provided in the limiting groove.

[0014] Preferably, a tail plate is provided at the tail of the screw, a card slot is provided on the inner circumferential surface of the one-way rotating shaft at intervals from the limit bar, the protrusion on the side of the tail plate is slidably provided in the card slot, a hole is provided at the lower part of the one-way rotating shaft which passes through the side wall of the one-way rotating shaft, the hole is connected to the card slot, an elastic plate is provided on the upper side wall of the hole, a card hole is provided on the side wall of the upper rotating part at a position corresponding to the elastic plate, and the end of the elastic plate is wedge-shaped.

[0015] Preferably, a top button is slidably provided on the upper portion of the dose adjustment knob, and a spring is provided between the top button and the upper rotating member.

[0016] Preferably, the outer circumference of the cylindrical portion of the dose adjustment knob is marked with dose markings, a first window is opened on the upper portion of the shell, a second window is opened on the window fixing member at a position corresponding to the first window, and an indicator block is provided on the lower side wall of the second window.

[0017] Preferably, the dose marking lines are arranged in a spiral shape on the outer circumferential surface of the cylindrical portion, and the spiral shape of the dose marking lines is consistent with the spiral shape of the thread.

[0018] Preferably, an annular protrusion is provided above the one-way gear ring on the inner circumferential surface of the shell, the lower pressure plate is clamped on the annular protrusion, and the one-way rotating shaft passes through the center hole of the lower pressure plate and is rotatably connected to the lower pressure plate.

[0019] Preferably, the device further comprises a liquid medicine unit, which comprises a cartridge housing. The cartridge housing is clamped to the lower portion of the housing, and the cartridge is fixedly disposed in the cartridge housing.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] The multi-dose high-precision disposable insulin injection device of the present invention uses a dose setting unit to set the dose of insulin to be injected, and uses an injection transmission unit to complete the injection of the corresponding dose. The dose setting unit can accurately set the dose to be injected, is easy to operate, and has low cost.

[0022] The multi-dose high-precision disposable insulin injection device described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic structural diagram of the multi-dose high-precision disposable insulin injection device disclosed in the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the multi-dose high-precision disposable insulin injection device disclosed in the present invention after dose adjustment;

[0026] Figure 3 This is a schematic diagram of the exploded structure of the multi-dose high-precision disposable insulin injection device disclosed in the present invention;

[0027] Figure 4 It is a schematic cross-sectional structural diagram of the dosage adjustment unit and the injection transmission unit disclosed in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the window fixing member disclosed in the present invention;

[0029] Figure 6 This is a schematic structural diagram of the dosage adjustment knob disclosed in the present invention;

[0030] Figure 7 This is a schematic structural diagram of a cross-section of the dosage adjustment knob disclosed in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the upper rotating member disclosed in the present invention;

[0032] Figure 9 It is a schematic structural diagram of a cross-section of the upper rotating member disclosed in the present invention;

[0033] Figure 10 It is a schematic structural diagram of a cross-section of the shell disclosed in the present invention;

[0034] Figure 11 This is a schematic diagram of the structure of the one-way rotating shaft disclosed in the present invention.

[0035] Figure 12 It is a schematic structural diagram of a cross-section of the one-way rotating shaft disclosed in the present invention;

[0036] Figure 13 It is a structural schematic diagram of the screw disclosed in the present invention;

[0037] Figure 14 This is a schematic structural diagram of the top button disclosed in the present invention;

[0038] Figure 15 This is a schematic structural diagram of the needle storage unit disclosed in the present invention;

[0039] Figure 16 for Figure 15 A schematic diagram of the enlarged structure of part A;

[0040] Figure 17 This is a schematic structural diagram of a radial cross-section of the needle storage unit disclosed in the present invention;

[0041] Figure 18 This is a schematic structural diagram of the needle tip of the blood glucose sensor disclosed in the present invention.

[0042] in:

[0043] 1. Housing, 101. One-way gear ring, 102. Threaded hole, 103. Annular protrusion, 104. First window,

[0044] 2. Dose adjustment knob, 201, cylindrical part, 202, knob part, 2011, thread groove, 2012, end face gear ring, 2013, dose marking line,

[0045] 3. Window fixing part, 301. Thread, 302. Second window, 303. Indicator block,

[0046] 4. Upper rotating part, 401. Ring gear, 402. Raised strip, 403. Clamping hole, 404. Connecting column,

[0047] 5. One-way rotating shaft, 501. Elastic arm, 502. Limiting bar, 503. Slot, 504. Hole, 505. Elastic plate,

[0048] 6. Screw, 601. Limiting groove, 602. Tail plate, 6021. Bump, 603. Connecting ball,

[0049] 7. Top button, 701, press column,

[0050] 8. Spring, 9. Cartridge cover, 10. Cartridge, 11. Lower pressure plate, 12. Rubber cap, 13. Rubber stopper, 14. Rubber stopper pad, 15. Pen case,

[0051] 16. Shell, 161. Cylindrical part,

[0052] 17. Ring plate,

[0053] 18, claw, 181, wedge groove,

[0054] 19. Limit block, 20. Limit groove, 21. Limit protrusion, 22. Long hole, 23. Handle, 24. Sealing cover, 25. Main body, 26. Needle tip, 27. Blood glucose sensor, 28. Annular groove,

[0055] 100. Needle. DETAILED DESCRIPTION

[0056] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0057] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0058] like Figure 1-14As shown, the present invention provides a multi-dose high-precision disposable insulin injection device, comprising a housing 1 and a dose adjustment unit and an injection transmission unit disposed within the housing 1. The dose adjustment unit is disposed within the upper portion of the housing, the injection transmission unit is disposed within the lower portion of the housing 1, the dose setting unit is transmission-connected to the injection transmission unit, the dose adjustment unit is used to preset an injection dose, and the injection transmission unit is used to transmit injection power to discharge the preset injection dose to complete the injection.

[0059] Furthermore, the dose adjustment unit includes a dose adjustment knob 2, a window fixing member 3, and an upper rotating member 4. The window fixing member 3 is fixedly disposed at the upper portion of the housing 1. A thread 301 is provided on the inner circumference of the window fixing member 3. The dose adjustment knob 2 is movably disposed within the window fixing member 3. The dose adjustment knob 2 includes a cylindrical portion 201 and a knob portion 202. A thread groove 2011 is provided on the outer circumference of the cylindrical portion 201. The thread groove 2011 is engaged with the thread 301.

[0060] The upper rotating member 4 is movably disposed within the dose adjustment knob 2. An annular tooth 401 is provided on the lower end surface of the upper rotating member 4 along the circumferential direction. An end face tooth ring 2012 is provided at the lower portion of the cylindrical portion 201 opposite to the annular tooth 401. When the dose adjustment knob 2 is rotated to preset the injection dose, the annular tooth 401 jumps on the end face tooth ring 2012. During injection, the upper rotating member 4 and the dose adjustment knob 2 are locked by the annular tooth 401 and the end face tooth ring 2012.

[0061] Furthermore, the injection transmission unit includes a one-way rotating shaft 5 slidably disposed within the upper rotating member 4, an elastic arm 501 being disposed on the outer circumferential surface of the lower portion of the one-way rotating shaft 5, and a one-way ring gear 101 being disposed on the inner circumference of the housing 1 at a position corresponding to the elastic arm 501, the one-way ring gear 101 being engaged with the elastic arm 501;

[0062] A screw 6 is slidably arranged inside the one-way rotating shaft 5, and a threaded hole 102 is provided at the lower part of the housing 1. The screw 6 is threadedly connected to the threaded hole 102. When the dose adjustment knob 2 is rotated to preset the injection dose, the one-way rotating shaft 5 limits the rotation of the upper rotating member 4. During injection, the one-way rotating shaft 5 drives the screw 6 to rotate.

[0063] Furthermore, a limit strip 502 extending along the axial direction of the one-way rotating shaft 5 is provided on the inner circumferential surface of the one-way rotating shaft 5, and a limit groove 601 is provided on the outer circumferential surface of the screw 6 at a position corresponding to the limit strip 502, and the limit strip 502 is slidably set in the limit groove 601.

[0064] Furthermore, a tail plate 602 is provided at the tail of the screw 6, a card slot 503 is provided on the inner circumferential surface of the one-way rotating shaft 5 at intervals from the limit bar 502, a protrusion 6021 on the side of the tail plate 602 is slidably provided in the card slot 503, a hole 504 is provided at the lower part of the one-way rotating shaft 5 which passes through the side wall of the one-way rotating shaft 5, the hole 504 is connected to the card slot 503, an elastic plate 505 is provided on the upper side wall of the hole 504, a card hole 403 is provided on the side wall of the upper rotating member 4 at a position corresponding to the elastic plate 505, and the end of the elastic plate 505 is wedge-shaped.

[0065] Furthermore, a top button 7 is slidably provided on the upper portion of the dose adjustment knob 2 , and a spring 8 is provided between the top button 7 and the upper rotating member 4 .

[0066] Furthermore, a dose marking line 2013 is drawn on the outer circumference of the cylindrical portion 201 of the dose adjustment knob 2, a first window 104 is opened on the upper portion of the shell 1, a second window 302 is opened on the window fixing member 3 at a position corresponding to the first window 104, and an indicator block 303 is set on the lower side wall of the second window 302.

[0067] Furthermore, the dose marking lines 2013 are arranged in a spiral shape on the outer circumferential surface of the cylindrical portion 201 , and the spiral shape of the dose marking lines 2013 is consistent with the spiral shape of the thread 301 .

[0068] Furthermore, an annular protrusion 103 is provided above the one-way gear ring 101 on the inner circumferential surface of the housing 1 , and the lower pressing plate 11 is clamped on the annular protrusion 103 . The one-way rotating shaft 5 passes through the center hole of the lower pressing plate 11 and is rotatably connected to the lower pressing plate 11 .

[0069] Furthermore, a liquid medicine unit is included. The liquid medicine unit includes a cartridge housing 9 . The cartridge housing 9 is clamped to the lower portion of the housing 1 . The cartridge 10 is fixedly disposed in the cartridge housing 9 .

[0070] The working principle of the above technical solution: The multi-dose high-precision disposable insulin injection device disclosed in the present invention can be operated by the patient to complete the injection, including preparation before injection, injection dose setting and injection:

[0071] Preparation before injection:

[0072] Assemble the needle: To assemble the needle before injection, the patient needs to prepare the injection needle and sterile alcohol, then remove the pen shell, sterilize the needle part at the bottom of the cartridge bottle with alcohol or other means, remove the needle after sterilization is completed and install the needle on the manual insulin injection pen.

[0073] Exhaust: When there is air in the insulin solution in the cartridge, first adjust the dose adjustment knob 2 upward. According to the amount of air in the cartridge, adjust the dose adjustment knob 2 to extend upward. After the adjustment is completed, press the top button 7 on the top of the injection pen to exhaust the air in the cartridge and return the dose adjustment knob 2 to its original position, so that the indicator block 303 on the window fixture 3 is aligned with the zero degree of the dose mark 2013.

[0074] Dosage adjustment:

[0075] First, manually adjust the dose adjustment knob 2 at the upper end of the manual insulin injection pen. When adjusting the dose, rotate the dose adjustment knob 2 clockwise. The dose adjustment knob 2 drives the upper rotating member 4 to rotate upward. The upper rotating member 4 and the one-way rotating shaft 5 can only slide along the axial direction. 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 able to rotate counterclockwise but not clockwise. The movement direction of the upper rotating member 4 is up and down sliding. The annular tooth 401 on the lower end face of the upper rotating member 4 engages with the end face gear ring 2012 at the lower part of the dose adjustment knob 2, so the dose adjustment member 4 can be adjusted. When the dose adjustment knob 2 is rotated clockwise, the upper rotating member pushes up the spring 8, causing the annular tooth 401 of the upper rotating member to separate from the end face tooth ring 2012 at the bottom of the dose adjustment knob 2 and jump up and down. Under the pressure of the spring 8, a clicking sound and a hand feeling are emitted. According to the corresponding position of the indicator block 303 on the window fixing member 3 and the dose mark 2013, when the patient adjusts to the required dose, the end face tooth ring 2012 at the bottom of the dose adjustment knob 2 stops rotating and engages with the annular tooth 401 of the upper rotating member 4, and the dose adjustment knob 2 extends upward in the window fixing member 3 (as shown in FIG. Figure 2 As shown), the lower end surface of the knob portion 202 of the dose adjustment knob 2 is at a certain distance from the upper end surface of the housing 1. For different dose adjustments, the distance between the lower end surface of the knob portion 202 and the upper end surface of the housing 1 is different.

[0076] The clockwise and counterclockwise rotation directions of the dose adjustment knob 2 both refer to directions when the rotation of the dose adjustment knob 2 is observed from above the top button 7 of the injection device.

[0077] The one-way rotating shaft 5 is cylindrical and slides along the axial direction of the upper rotating member 4 inside the upper rotating member 4. A convex strip 402 arranged along the axial direction of the upper rotating member 4 is fixedly provided on the inner circumferential surface of the upper rotating member 4. A groove is provided on the outer circumferential surface of the one-way rotating shaft 5 at a position corresponding to the convex strip 402. The convex strip 402 is slidably set in the groove, and the groove is spaced apart from the hole 504.

[0078] injection:

[0079] When the patient is injecting, the injection site is sterilized with alcohol or other means, and the protective cover of the needle is removed by hand to expose the needle. After the needle is inserted into the injection site, the top button 7 on the upper part of the manual injection device is pressed by hand. The spring 8 is compressed, and the pressing column 701 in the top button 7 contacts the connecting column 404 on the top of the upper rotating part 4 and transmits the force to the upper rotating part 4. At this time, the annular tooth 401 at the lower end of the upper rotating part 4 engages with the end face tooth ring 2012 at the lower part of the dose adjustment knob 2 and presses downward. At this time, the dose adjustment knob 2 rotates counterclockwise and moves downward under the action of the thread groove 2011 and the thread 301. Since the unidirectional rotating shaft 5 can only rotate counterclockwise and cannot Rotate clockwise, the upper rotating member 4 drives the one-way rotating shaft 5 to rotate, and the one-way rotating shaft 5 drives the screw 6 to rotate. At this time, the elastic arm 501 at the lower end of the one-way rotating shaft 5 jumps and makes a clicking sound. The screw 6 rotates in the threaded hole 102 and moves downward, pushing the plug 13 in the cartridge bottle through the plug pad 14 connected to the connecting ball 603 at the lower end of the screw 6. The shell is stationary when held in the hand, and the screw 6 pushes the plug pad 14 to push the plug 13 and accurately inject the drug solution 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 drug solution is completely injected into the patient's body and to prevent 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.

[0080] A rubber cap 12 is provided at the opening of the cartridge 10 at one end away from the rubber stopper 13. The rubber cap 12 is used to seal the cartridge. During injection, the rear end of the needle tip 26 pierces the rubber cap and enters the cartridge. After a single injection is completed and the needle is removed, the rubber cap 12 uses its own elasticity to close the hole pierced by the needle tip when entering.

[0081] The end face gear ring refers to a plurality of teeth fixedly arranged along the circumferential direction of the ring on an end face of the ring-shaped base, and the extension lines of the tooth tops of the plurality of teeth all pass through the center line of the ring-shaped base.

[0082] The pitch of the threaded hole 102 is the same as the pitch of the thread 301 .

[0083] When the dose adjustment knob 2 is rotated to preset the injection dose, the annular tooth 401 jumps on the end face tooth ring 2012. During injection, the upper rotating member 4 is pressed by the top button 7 so that the annular tooth 401 and the end face tooth ring 2012 are locked, and the upper rotating member 4 and the dose adjustment knob 2 remain fixed.

[0084] Needle removal: When the injection is completed and stays for more than 5 seconds, pull out the injection pen, put the needle protection cover back on, twist the injection needle by hand, place it in the needle storage unit after twisting it out, cover the pen case, and place the insulin injection device in a safe place.

[0085] The screw 6 moves a certain distance downwards from the housing 1 with each injection. After multiple uses, the screw 6 moves downwards to discharge all the liquid medicine in the cartridge. Then, the protrusions 6021 on the two side walls of the tail plate 602 at the rear of the screw 6 slide to the position of the elastic plate 505. The protrusions 6021 squeeze the wedge-shaped end of the elastic plate 505, forcing the elastic plate 505 outwards into the inside of the locking hole 403 of the upper rotating member 4. The end of the elastic plate 505 is stuck on the lower side wall of the locking hole 403, preventing the dose adjustment knob 2 and the upper rotating member 4 from moving upwards and being locked. Therefore, the dose adjustment cannot be performed anymore and it indicates that the liquid medicine in the cartridge has been used up.

[0086] Beneficial effects of the above technical solution:

[0087] The multi-dose high-precision disposable insulin injection device of the present invention uses a dose setting unit to set the dose of insulin to be injected, and uses an injection transmission unit to complete the injection of the corresponding dose. The dose setting unit can accurately set the dose to be injected, is easy to operate, and has low cost.

[0088] In one embodiment, Figure 15-17 As shown, a needle storage unit is provided at the top of the pen case. The pen case 15 is sleeved on the outside of the cartridge sleeve 9 to play a protective role. A needle storage unit is provided on the top of the pen case 15 for placing a needle 16. The needle storage unit includes a shell 16 fixedly provided on the top wall of the pen case 15. The shell 16 includes a cylindrical portion 161, a conical portion and a needle portion. An annular plate 17 is slidably provided in the cylindrical portion 161. At least two claws 18 are arranged in a circumferential array on the upper end surface of the annular plate 17. A wedge-shaped groove 181 is provided on the side wall of the claw 18 away from the center of the annular plate 17. The width of the lower end of the wedge groove 181 is greater than the width of the upper end. A limit block 19 is fixedly provided at a position corresponding to the wedge groove 171 on the inner wall of the cylindrical portion 161. The wedge groove 171 is slidably connected to the limit block 19.

[0089] A limiting groove 20 is provided on the inner wall of the cylindrical portion 161 along the axial direction of the cylinder. A limiting protrusion 21 is fixedly provided on the outer circumference of the annular plate 17 at a position corresponding to the limiting groove 20 . The limiting protrusion 21 is slidably connected to the limiting groove 20 .

[0090] A long hole 22 is provided on the side wall of the cylindrical portion 161 and passes through the side wall of the cylindrical portion 161. A handle 23 is fixedly provided at a position corresponding to the long hole 22 on the outer circumference of the annular plate 17. The handle 23 is slidably provided in the long hole 22. The long hole 22 is parallel to the axial direction of the cylindrical portion 161.

[0091] A sealing cover 24 is detachably provided at the opening of the cylindrical portion 161 .

[0092] The working principle of the above technical solution is:

[0093] Since the insulin solution in the cartridge can be used multiple times, after one injection, the needle 100 needs to be removed from the injection device and stored separately. If the needle 100 is left on the insulin injection device, the needle 16 will be connected to the solution in the cartridge, causing the solution in the cartridge to be lost. It is also unsafe when opening the pen housing 15.

[0094] If the needle 100 is stored separately, the needle 100 will be separated from the insulin injection device before injection, and the needle may not be found. Therefore, a needle storage unit is set on the top of the pen shell 15 of the insulin injection device, and the needle storage unit includes a shell 16 fixedly set on the top wall of the pen shell 15. The shell 16 includes a cylindrical portion 161, a conical portion and a needle portion. An annular plate 17 is slidably set in the cylindrical portion 161. At least two claws 18 are arranged in a circular array on the upper end surface of the annular plate 17. A wedge-shaped groove 181 is provided on the side wall of the claw 18 away from the center of the annular plate 17. The width of the lower end of the wedge groove 181 is greater than the width of the upper end. A limit block 18 is fixedly set at a position corresponding to the wedge groove 171 on the inner wall of the cylindrical portion 161, and the wedge groove 171 is slidably connected to the limit block 18.

[0095] When storing the needle 16, first open the sealing cover 22, push the handle 23 upward, and move the annular plate 17 upward. Since the width of the upper end of the wedge-shaped groove 181 of the claw 18 on the annular plate 17 is smaller than the width of the lower end, when the annular plate 17 moves upward to the uppermost position, the limit block 19 no longer squeezes the claw 18, so that the claw 18 moves in the direction away from the central axis of the cylindrical portion 161, so that the main body 25 of the needle 100 can enter the middle of the claw 18, the lower end surface of the needle 100 contacts the upper end surface of the annular plate 17, and the needle tip 26 of the needle 100 passes through the hole of the annular plate 17. Press the needle 100 or push the handle 23 downward to move the needle 100 and the annular plate 17 downward together. The wedge-shaped groove of the claw 18 that moves downward with the annular plate 17 is gradually squeezed by the limit block 19 during the movement, causing the upper end of the limit block 19 to move toward the direction close to the central axis of the cylindrical portion 161. After the annular plate and the needle are moved into place, the upper end of the claw 18 is pressed tightly against the outer wall of the main body 25 of the needle to keep the needle stable. At this time, the needle tip 26 is located in the syringe portion of the shell 16. Then, after covering the sealing cover 24 and the pen shell 15, the insulin injection device is put away.

[0096] The handle 23 is provided to control the up and down movement of the annular plate 17, so as to facilitate the storage and removal of the needle.

[0097] Sterilizing cotton may also be provided in the syringe portion to retain alcohol in the sterilizing cotton. After the needle 100 is placed in the needle storage unit, the sterilizing cotton may sterilize the needle tip.

[0098] Beneficial effects of the above technical solution:

[0099] A needle storage unit is set on the top of the pen shell. After an 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 can be placed at the same time as the insulin injection device to prevent the needle from being lost during the next injection.

[0100] In one embodiment, Figure 18 As shown, a blood glucose sensor 27 is provided on the needle tip 26 of the needle 100. An annular groove 28 is defined on the outer circumferential surface of the needle tip 26. The blood glucose sensor 27 is fixedly disposed in the annular groove 28. The blood glucose sensor 27 is electrically connected to a processing unit, which is fixedly disposed on the main body 25 of the needle 100. The processing unit is wirelessly connected to a display, which is fixedly disposed on the pen housing 15.

[0101] 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 respectively, and the wireless communication module is wirelessly connected to the display. A blood glucose prediction model is preset in the processor, and the blood glucose value at the next injection is predicted based on historical data. The processor also has a preset blood glucose value and insulin injection dose database. When the patient performs an insulin injection, the processor predicts the blood glucose value at the next injection time based on the patient's blood glucose value detected by the blood glucose sensor and the historical blood glucose value data stored in the processor, compares it with the database, gives the insulin injection dose for the next injection and displays it on the display.

[0102] The working principle of the above technical solution is:

[0103] In the prior art, blood glucose monitoring is mostly done non-invasively or by implantation. The accuracy of the detection values of non-invasive monitoring is low. For implantable monitoring, a blood glucose monitoring electrode needs to be implanted in the patient's body, which can cause discomfort to the patient. A blood glucose sensor is fixed on the needle tip 26 of the needle to detect the patient's blood glucose during insulin injection. The data is accurate and the patient does not need to implant a blood glucose electrode. The blood glucose prediction model of the processor predicts the patient's blood glucose value at the time of the next injection based on the blood glucose detection value and historical values, and gives the insulin dosage for the next injection, thereby improving the accuracy of the insulin injection dosage. 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 repeated here.

[0104] Beneficial effects of the above technical solution:

[0105] A sensor is set on the needle tip to directly detect the blood sugar value in the patient's blood. The detected blood sugar value of the patient is accurate, which can avoid the discomfort caused by the patient carrying an implanted blood glucose meter for a long time. The dosage of insulin injection is determined according to the detected blood sugar value, thereby improving the accuracy of insulin injection dosage.

[0106] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0107] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0108] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A multi-dose high-precision disposable insulin injection device, characterized in that: It includes a shell (1) and a The dose adjustment unit and the injection transmission unit are arranged in the body (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 setting unit is in transmission connection with the injection transmission unit, the dose adjustment unit is used to preset the injection dose, and the injection transmission unit is used to transmit the injection power to discharge the preset injection dose to complete the injection; The dose adjustment unit comprises a dose adjustment knob (2), a window fixing member (3) and an upper rotating member (4), wherein the dose adjustment knob (2) is threadedly connected to the window fixing member (3), and the upper rotating member (4) is movably arranged in the dose adjustment knob (2); The injection transmission unit comprises a one-way rotating shaft (5) slidably arranged in the upper rotating member (4), a screw (6) slidably arranged in the one-way rotating shaft (5), a threaded hole (102) is arranged at the lower part of the housing (1), the screw (6) is threadedly connected to the threaded hole (102), when the dose adjustment knob (2) is rotated to preset the injection dose, the one-way rotating shaft (5) limits the rotation of the upper rotating member (4), when the injection is performed, the one-way rotating shaft (5) drives the screw (6) to rotate, and a limit 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 tail plate (602) is provided at the tail of the screw (6), a clamping groove (503) is provided on the inner circumferential surface of the one-way rotating shaft (5) at intervals from the limiting strip (502), a protrusion (6021) on the side of the tail plate (602) is slidably provided in the clamping groove (503), a hole (504) penetrating the side wall of the one-way rotating shaft (5) is provided at the lower part of the one-way rotating shaft (5), the hole (504) is communicated with the clamping groove (503), an elastic plate (505) is provided on the upper side wall of the hole (504), a clamping hole (403) is provided on the side wall of the upper rotating member (4) at a position corresponding to the elastic plate (505), and the end of the elastic plate (505) is wedge-shaped.

2. The multi-dose high-precision disposable insulin injection device according to claim 1, characterized in that: The window fixing member (3) is fixedly arranged at the upper portion of the housing (1); a thread (301) is arranged on the inner circumference of the window fixing member (3); the dose adjustment knob (2) is movably arranged in the window fixing member (3); the dose adjustment knob (2) comprises a cylindrical portion (201) and a knob portion (202); a thread groove (2011) is provided on the outer circumference of the cylindrical portion (201); the thread groove (2011) is cooperatively connected with the thread (301); An annular tooth (401) is provided on the lower end surface of the upper rotating member (4) along the circumferential direction, and an end face tooth ring (2012) is provided at the lower portion of the cylindrical portion (201) opposite to the annular tooth (401). When the dose adjustment knob (2) is rotated to preset the injection dose, the annular tooth (401) jumps on the end face tooth ring (2012). During injection, the upper rotating member (4) and the dose adjustment knob (2) are locked via the annular tooth (401) and the end face tooth ring (2012).

3. The multi-dose high-precision disposable insulin injection device according to claim 2, characterized in that: An elastic arm (501) is provided on the outer circumferential surface of the lower portion of the one-way rotating shaft (5), and a one-way gear ring (101) is provided on the inner circumference of the housing (1) at a position corresponding to the elastic arm (501). The one-way gear ring (101) is engaged with the elastic arm (501).

4. The multi-dose high-precision disposable insulin injection device according to claim 3, characterized in that: A limiting groove (601) is provided on the outer circumferential surface of the screw rod (6) at a position corresponding to the limiting strip (502), and the limiting strip (502) is slidably arranged in the limiting groove (601).

5. The multi-dose high-precision disposable insulin injection device according to claim 4, characterized in that: A top button (7) is provided on the upper portion of the dose adjustment knob (2) and a spring (8) is provided between the top button (7) and the upper rotating member (4).

6. The multi-dose high-precision disposable insulin injection device according to claim 5, characterized in that: The outer circumference of the cylindrical portion (201) of the dose adjustment knob (2) is marked with a dose marking line (2013), the upper portion of the housing (1) is provided with a first window (104), a second window (302) is provided on the window fixing member (3) at a position corresponding to the first window (104), and an indicator block (303) is provided on the lower side wall of the second window (302).

7. The multi-dose high-precision disposable insulin injection device according to claim 6, characterized in that: The dose marking lines (2013) are arranged in a spiral shape on the outer circumferential surface of the cylindrical portion (201), and the spiral shape of the dose marking lines (2013) is consistent with the spiral shape of the thread (301).

8. The multi-dose high-precision disposable insulin injection device according to claim 7, characterized in that: An annular protrusion (103) is provided above the one-way gear ring (101) on the inner circumferential surface of the housing (1), and the lower pressing plate (11) is clamped on the annular protrusion (103). The one-way rotating shaft (5) passes through the center hole of the lower pressing plate (11) and is rotatably connected to the lower pressing plate (11).

9. The multi-dose high-precision disposable insulin injection device according to claim 1, characterized in that: The device further comprises a liquid medicine unit, which comprises a cartridge bottle jacket (9), the cartridge bottle jacket (9) being clamped to the lower portion of the housing (1), and the cartridge bottle (10) being fixedly arranged in the cartridge bottle jacket (9).

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