Medical injection system

Abstract

A medical injection system includes an injection module and a cartridge module coupled to the injection module. The injection module includes a plunger, a driver, a driver sleeve, a dose plate, and a marker tube. The plunger is movable along an axial direction of the medical injection system to the cartridge module. The driver partially surrounds the plunger and is rotatable with the plunger. The driver sleeve partially surrounds the driver and includes a first sleeve end facing a distal end of the medical injection system and having a plurality of sleeve teeth. The dose plate includes a first plate end facing the distal end, a second plate end facing a proximal end of the medical injection system and having a plurality of plate teeth corresponding to the plurality of sleeve teeth, and a side surface between the two plate ends and having surface teeth. The marker tube surrounds the driver sleeve and the dose plate and has a plurality of tube indentations adjacent to a first tube end facing the distal end, and the surface teeth of the dose plate correspond to one of the plurality of tube indentations.

Description

Technical Field

[0001] This invention relates to the field of medical injection systems, and in particular, to a pen-shaped medical injection system for drug delivery. Background Technology

[0002] Medical fluids or medications can be administered to patients via injection systems. If a patient is expected to require frequent medication administration, the injection system should be portable and self-administered by the patient. Therefore, portable medical injection systems are already common products on the market for patients requiring daily injections. Portable medical injection systems are typically pen-shaped.

[0003] Patients can use portable medical injection systems to administer specific doses of medication. When adjusting the dosage using a standard injection pen, patients will need to visually check the amount of medication to be administered. For visually impaired patients, it may be difficult to check or adjust the medication dosage simply by seeing the dosage markings on the standard injection pen.

[0004] Therefore, a non-visual dose adjustment design is needed for medical injection systems. Summary of the Invention

[0005] The present invention was made in view of the above-mentioned problems, and provides a medical injection system having a cartridge.

[0006] The present invention also provides a medical injection system including a dosing plate. When the medical injection system is moved (e.g., rotated in different directions), the dosing plate can produce different sounds.

[0007] To address the aforementioned issues, the present invention provides a medical injection system comprising: an injection module, wherein the injection module includes: a push rod movable along the axial direction of the medical injection system; a driver configured to partially surround the push rod and rotatable with the push rod; a drive sleeve configured to partially surround the driver and having a first sleeve end facing the distal end of the medical injection system, wherein the first sleeve end has a plurality of sleeve teeth; and a dosing plate including a first plate end facing the distal end and a second plate end facing the proximal end of the medical injection system. The device includes a plate end and a side surface located between the first plate end and the second plate end, wherein the second plate end has a plurality of plate teeth corresponding to the plurality of sleeve teeth, and the side surface has surface teeth; a marking tube configured to surround the drive sleeve and the dosing plate, and having a plurality of sleeve recesses, wherein the plurality of sleeve recesses are adjacent to the first sleeve end facing the distal end, and the surface teeth of the dosing plate correspond to one of the plurality of sleeve recesses; and a cartridge module coupled to the injection module, wherein the push rod is configured to be movable along the axial direction into the cartridge module.

[0008] In one embodiment, each of the plurality of plate teeth engages with one of the plurality of sleeve teeth; and the surface tooth engages with one of the plurality of sleeve recesses.

[0009] In one embodiment, the medical injection system further includes: a control knob coupled to the marking tube and rotatable in a first rotation direction and a second rotation direction; when the control knob is rotated in the first rotation direction, each of the plurality of plate teeth rotates from engaging with one of the plurality of sleeve teeth to engaging with another of the plurality of sleeve teeth; and when the control knob is rotated in the second rotation direction, the plurality of cannula recesses rotate, thereby changing the engagement target of the surface teeth from one of the plurality of cannula recesses to another of the plurality of cannula recesses.

[0010] In one embodiment, a first sound is generated between the plurality of plate teeth and the plurality of sleeve teeth to indicate that rotation is taking place in the first direction of rotation; and a second sound is generated between the surface teeth and the plurality of sleeve recesses to indicate that rotation is taking place in the second direction of rotation.

[0011] In one embodiment, when the control knob is rotated in the first rotation direction, the marking tube moves toward the proximal end of the medical injection system; and when the control knob is rotated in the second rotation direction, the marking tube moves toward the distal end of the medical injection system.

[0012] In one embodiment, the surface tooth includes a first inclined surface having a first slope and a second inclined surface having a second slope, wherein the first slope is different from the second slope; the first inclined surface is configured to lock the surface tooth in one of the plurality of cannula recesses to allow the dosing plate to rotate in a third rotational direction via the marking tube; and while the marking tube is rotating, the surface tooth is movable between the plurality of cannula recesses via the second inclined surface when the dosing plate is not rotated.

[0013] In one embodiment, when the control knob is rotated in the first rotation direction, the surface tooth locks into one of the plurality of cannula recesses to rotate the dosing plate through the marking tube; and when the control knob is rotated in the second rotation direction, the surface tooth remains stationary and the plurality of cannula recesses rotate around the surface tooth.

[0014] In one embodiment, the third rotation direction is the same as one of the first rotation direction and the second rotation direction.

[0015] In one embodiment, when the control knob rotates the marking tube in a first rotation direction, the marking tube rotates the dosage plate, and the drive sleeve remains stationary; and when the control knob rotates the marking tube in a second rotation direction, the dosage plate and the drive sleeve remain stationary, wherein the first rotation direction is different from the second rotation direction.

[0016] In one embodiment, when the control knob rotates the marking tube along the first rotation direction, a first relative rotation between the dose plate and the drive sleeve produces a first sound; and when the control knob rotates the marking tube along the second rotation direction, a second relative rotation between the dose plate and the marking tube produces a second sound.

[0017] In one embodiment, the medical injection system further includes a bolt and nut that engage with the drive sleeve.

[0018] In one embodiment, the drive sleeve further includes: a sleeve thread that engages with the bolt nut, wherein the bolt nut is rotatable on the sleeve thread; and a positioning structure located between the sleeve thread and the plurality of sleeve teeth and configured to define the initial position of the bolt nut.

[0019] In one embodiment, the positioning structure further includes: a positioning protrusion protruding outward adjacent to the sleeve thread; and a plurality of positioning recesses coupled to the positioning protrusion, wherein the positioning protrusion is sandwiched between at least two of the plurality of positioning recesses.

[0020] In one embodiment, the bolt nut further includes: a nut thread that engages with the sleeve thread and rotates the bolt nut on the drive sleeve; and a nut groove that engages with the positioning protrusion to define the initial position.

[0021] In one embodiment, the marking tube further includes: an internal protrusion surrounding the inner surface of the marking tube and adjacent to the first sleeve end, wherein: the internal protrusion contacts the first plate end of the dosing plate, and the dosing plate is located between the internal protrusion and the second sleeve end facing the proximal end.

[0022] To address the aforementioned problems, the present invention also provides a medical injection system, comprising: an injection module, wherein the injection module includes: a push rod movable along the axial direction of the medical injection system; a drive sleeve configured to partially surround the push rod and having a first sleeve end facing the distal end of the medical injection system, wherein the first sleeve end has a plurality of sleeve teeth; a dosage plate including a first plate end facing the distal end, a second plate end facing the proximal end of the medical injection system, and a side surface located between the first plate end and the second plate end, wherein the second plate end has a side surface that supports... The device comprises a plurality of plate teeth corresponding to the plurality of sleeve teeth, and the side surface having surface teeth; and a marking tube configured to surround the drive sleeve and the dosing plate, and having a plurality of sleeve recesses, wherein: the plurality of sleeve recesses are adjacent to a first sleeve end facing the distal end, the surface teeth of the dosing plate correspond to one of the plurality of sleeve recesses, and include a first inclined surface having a first slope and a second inclined surface having a second slope, and the first slope being different from the second slope; and a cartridge module coupled to the injection module, wherein the push rod is configured to be movable along the axial direction into the cartridge module. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a perspective view of a medical injection system disclosed in an embodiment of the present invention.

[0025] Figure 2 This is a cross-sectional view of a medical injection system disclosed in an embodiment of the present invention.

[0026] Figure 3 This is an exploded view of the cartridge module of a medical injection system disclosed in an embodiment of the present invention.

[0027] Figure 4 This is a cross-sectional view of the cartridge module disclosed in an embodiment of the present invention.

[0028] Figure 5 This is an exploded view of the button module of the medical injection system disclosed in the embodiments of the present invention.

[0029] Figure 6 This is a cross-sectional view of the button module disclosed in an embodiment of the present invention.

[0030] Figure 7This is an exploded view of the injection module of the medical injection system disclosed in the embodiments of the present invention.

[0031] Figure 8 This is a cross-sectional view of the injection module disclosed in an embodiment of the present invention.

[0032] Figure 9 This is a perspective view of the combination of the plunger, driver, drive sleeve and dosing plate of the medical injection system disclosed in the embodiments of the present invention.

[0033] Figure 10 This is a perspective view of the combination of a dosing plate and a marking tube in a medical injection system disclosed in an embodiment of the present invention.

[0034] Figure 11 This is a cross-sectional view of the combination of the dosing plate and the marking tube of the medical injection system disclosed in the embodiments of the present invention.

[0035] Figure 12 This is a perspective view of the combination of the control knob, sleeve support, and marking tube of the medical injection system disclosed in the embodiments of the present invention.

[0036] Figure 13 This is a cross-sectional view of the combination of the control knob, sleeve support, and marking tube of the medical injection system disclosed in the embodiments of the present invention.

[0037] Figure 14 This is a perspective view of the combination of the drive sleeve and bolts and nuts of the medical injection system disclosed in the embodiments of the present invention.

[0038] Figure 15 This is a cross-sectional view of the combination of the drive sleeve and bolts and nuts of the medical injection system disclosed in the embodiments of the present invention.

[0039] Figure 16 This is another cross-sectional view of the combination of the drive sleeve and bolts and nuts of the medical injection system disclosed in the embodiments of the present invention. Detailed Implementation

[0040] The following description contains specific information relating to exemplary embodiments of the invention. The accompanying drawings and detailed description are merely exemplary embodiments. However, the invention is not limited to these exemplary embodiments. Other variations and embodiments of the invention will occur to those skilled in the art. Unless otherwise stated, the same or corresponding elements in the drawings may be indicated by the same or corresponding reference numerals. Furthermore, the drawings and illustrations in this invention are generally not drawn to scale and are not intended to correspond to actual relative dimensions.

[0041] For the purposes of consistency and ease of understanding, the same features are indicated by reference numerals in the exemplary drawings (although not in some examples). However, features in different embodiments may differ in other respects, and therefore should not be narrowly limited to the features shown in the drawings.

[0042] The terms "at least one embodiment," "one embodiment," "multiple embodiments," "different embodiments," "some embodiments," and "this embodiment" indicate that the embodiments of the present invention described herein may include specific features, structures, or characteristics, but not every possible embodiment of the present invention must include such specific features, structures, or characteristics. Furthermore, the repeated use of the phrases "in one embodiment" and "in this embodiment" does not necessarily refer to the same embodiment, although they may be identical. Moreover, the use of phrases such as "embodiment" in connection with "the present invention" does not imply that all embodiments of the present invention must include specific features, structures, or characteristics, and should be understood as "at least some embodiments of the present invention" including the stated specific features, structures, or characteristics. The term "coupled" is defined as a connection, whether direct or indirect through an intermediate element, and is not necessarily limited to physical connections. When the term "comprising" is used, it means "including but not limited to," which explicitly indicates an open inclusion or relationship of combinations, groups, series, and equivalents.

[0043] Furthermore, for illustrative and non-restrictive purposes, specific details such as functional entities, technologies, protocols, and standards are elaborated to provide an understanding of the described technologies. In other examples, detailed descriptions of well-known methods, technologies, systems, architectures, etc., are omitted to avoid obscuring the explanatory narrative with unnecessary details.

[0044] The terms "first," "second," and "third," etc., used in the specification and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the term "comprising," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or modules is not limited to the listed steps or modules, but may optionally include steps or modules not listed, or may optionally include other steps or modules inherent to these processes, methods, products, or apparatuses.

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0046] This invention generally relates to a medical injection system comprising a modular design and a cartridge structure. A user can use the medical injection system to perform a puncture on the skin of a person (e.g., the same user or another patient) and administer a drug or medical fluid. In some embodiments, the user may be an individual using the medical injection system of this invention. In some embodiments, the patient may be the same individual as the user, or may be another individual to whom drug administration is performed by the medical injection system of this invention. Since the medical injection system of this invention can be operated by the same person (e.g., a patient), the patient and the user described herein may be the same person. In some embodiments, the drug or medical fluid may be administered by the medical injection system. In some embodiments, the axis may be considered as a line formed between the two ends of an axis in the medical injection system.

[0047] Please see Figure 1 , Figure 1 This is a perspective view of a medical injection system disclosed in an embodiment of the present invention. The medical injection system 100 may include a cap 110, a cartridge module 120, a housing 130, and a button module 140.

[0048] In some embodiments, the cap 110 is detachably coupled to the cartridge module 120 and disposed on the distal end 101 of the medical injection system 100. In some embodiments, the distal end 101 may be one of the two ends of the medical injection system 100, facing the puncture site on the patient's skin when the medical injection system 100 is used. In some embodiments, the distal end 101 of the medical injection system 100 may be one of the two ends of the cap 110 when the cap 110 covers the cartridge module 120. In some embodiments, the cartridge module 120 may further include a plurality of cartridge elements integrated together to form the cartridge module 120. In some embodiments, at least one cartridge element in the cartridge module 120 may be detachably coupled to other cartridge elements in the cartridge module 120. The cartridge module 120 may contain a drug or medical fluid.

[0049] In some embodiments, housing 130 may be disposed on the proximal end 102 of cartridge module 120 relative to medical injection system 100. In some embodiments, proximal end 102 may be the other end of medical injection system 100, which is opposite distal end 101 when medical injection system 100 is used. In some embodiments, button module 140 may further include a plurality of button elements integrated together to form button module 140. In some embodiments, at least one of the button elements in button module 140 may be detachably coupled to other button elements in button module 140. In some embodiments, button module 140 may function as a button actuated (e.g., pressable by a user).

[0050] In some embodiments, a portion of the cartridge module 120 may be partially housed within the housing 130. In some embodiments, one or more cartridge elements may be partially or completely covered by the housing 130, while other cartridge elements may not be covered by the housing 130.

[0051] In some embodiments, a portion of the elements of the button module 140 may be partially housed within the housing 130. In some embodiments, one or more button elements may be partially or completely covered by the housing 130, while other button elements may not be covered by the housing 130. In other embodiments, each button element may be partially covered by the housing 130. In still other embodiments, all button elements may be completely covered by the housing 130.

[0052] Please see Figure 2 , Figure 2 This is a cross-sectional view of a medical injection system disclosed in an embodiment of the present invention. The medical injection system 100 may include a cap 110, a cartridge module 120, a housing 130, a button module 140, and may also include an injection module 250.

[0053] In some embodiments, the housing 130 may accommodate the injection module 250. Further reference... Figure 1 An injection module 250 for injecting drugs or medical fluids may be disposed on the proximal end 102 of the medical injection system 100. In some embodiments, the injection module 250 may further include a plurality of injection elements integrated together to generate the injection module 250. In some embodiments, at least one injection element in the injection module 250 may be detachably coupled to other injection elements in the injection module 250. In some embodiments, the injection module 250 may be detachably coupled to a cartridge module 120. In some embodiments, at least one injection element may be inserted into the cartridge module 120.

[0054] Please see Figure 3 , Figure 3 This is an exploded view of the cartridge module of a medical injection system disclosed in an embodiment of the present invention. The cartridge module 120 may further include a cartridge holder 321, a cartridge device 322, and a stopper 323.

[0055] In some embodiments, the cartridge holder 321 may accommodate the cartridge assembly 322. The cartridge assembly 322 may be detachably secured by the cartridge holder 321. A drug or medical fluid may be contained within the cartridge assembly 322. Further reference Figure 2 The stopper 323 may be disposed in the cartridge device 322 for actuation by the injection module 250. In some embodiments, a hollow needle (not shown) may be coupled to the cartridge holder 321 for piercing the patient's skin and administering the drug or medical fluid contained in the cartridge device 322.

[0056] Please see Figure 4 , Figure 4 This is a cross-sectional view of the cartridge module disclosed in an embodiment of the present invention. Figure 4 The orientation of the cross-sectional view shown may be different. Figure 2 The orientation of the cross-sectional view shown. Therefore, Figure 4 The structure of the cartridge module 120 shown may be similar to Figure 2 The details shown are slightly different. (See reference) Figure 2 In some embodiments, each cartridge element, including cartridge holder 321, cartridge assembly 322, and stopper 323, may be partially covered by housing 130.

[0057] In some implementations, reference Figure 4 The cartridge device 322 can be inserted into the cartridge holder 321, and a stopper 323 can be arranged in the cartridge device 322 to limit the volume of the drug or medical fluid contained in the cartridge device 322. Further reference. Figure 1 When the stopper 323 is pushed to move toward the distal end 101 of the medical injection system 100, the volume of the drug or medical fluid contained in the cartridge device 322 can be reduced. Therefore, the drug or medical fluid stored in the cartridge device 322 can be expelled from the hollow needle (not shown) by the stopper 323.

[0058] Please see Figure 5 , Figure 5 This is an exploded view of the button module of the medical injection system disclosed in the embodiments of the present invention. The button module 140 may further include a control button 541, a control knob 542, and a sleeve bracket 543.

[0059] In some embodiments, the control knob 542 may partially accommodate the control button 541 and the sleeve bracket 543. Further reference. Figure 5 The control button 541 can be engaged with the sleeve bracket 543, and the control knob 542 can be clamped between the control button 541 and the sleeve bracket 543.

[0060] Please see Figure 6 , Figure 6 This is a cross-sectional view of the button module disclosed in an embodiment of the present invention. Figure 6 The orientation of the cross-sectional view shown may be different. Figure 2 The orientation of the cross-sectional view shown. Therefore, Figure 6 The structure of the button module 140 shown may be similar to Figure 2 The ones shown are slightly different.

[0061] In some embodiments, the control button 541 may further include a button connecting portion 6411 and a button protrusion 6412 protruding from the button connecting portion 6411. In some embodiments, the control knob 542 may further include a knob channel 6421. In some embodiments, the sleeve bracket 543 may further include a first bracket connecting portion 6431, a second bracket connecting portion 6432, and a bracket groove 6433 located at the second bracket connecting portion 6432.

[0062] In some embodiments, the button connection portion 6411 of the control button 541 can be coupled to the second bracket connection portion 6432 by engaging the button protrusion 6412 with the bracket groove 6433. In some embodiments, the engagement between the button protrusion 6412 and the bracket groove 6433 can pass through the knob channel 6421, so that the control knob 542 can also be coupled to the control button 541 and the sleeve bracket 543.

[0063] Please see Figure 7 , Figure 7 This is an exploded view of the injection module of a medical injection system disclosed in an embodiment of the present invention. The injection module 250 may further include a push rod 7500, an actuator 7510, a locking element 7520, a rotating ring 7530, a drive sleeve 7540, a bolt and nut 7550, a dosage plate 7560, a button spring 7570, a marking tube 7580, and a threaded insert 7590.

[0064] In some embodiments, the push rod 7500, actuator 7510, actuator sleeve 7540, and marker tube 7580 are typically assembled concentrically with each other. In some embodiments, the push rod 7500 is the innermost element among the push rod 7500, actuator 7510, actuator sleeve 7540, and marker tube 7580. In some embodiments, the push rod 7500 is movable along the axis of the medical injection system 100. Further reference Figure 2 The cartridge module 120 can be coupled to the injection module 250, and the push rod 7500 can move along the axis to insert into the cartridge module 120.

[0065] In some embodiments, the actuator 7510 may be coupled to the locking element 7520, which may be further coupled to the rotating ring 7530. In other words, the locking element 7520 may be located between the actuator 7510 and the rotating ring 7530, and sandwiched between the actuator 7510 and the rotating ring 7530. In some embodiments, the actuator 7510 may partially accommodate the push rod 7500 and may rotate with the push rod 7500.

[0066] In some embodiments, the drive sleeve 7540 may partially accommodate the driver 7510. Further reference... Figure 7In some embodiments, a push-button spring 7570 may be fitted onto the drive sleeve 7540 at its proximal end 102. In some embodiments, a bolt nut 7550 may be fitted onto the drive sleeve 7540 at its distal end. In some embodiments, a dosing plate 7560 may be coupled to the drive sleeve 7540 by coupling the proximal end of the dosing plate 7560 to the distal end of the drive sleeve 7540. Furthermore, in some embodiments, a threaded insert 7590 may cover a marking tube 7580, which may receive the drive sleeve 7540.

[0067] Please see Figure 8 , Figure 8 This is a cross-sectional view of the injection module disclosed in an embodiment of the present invention. Figure 8 The orientation of the cross-sectional view shown may be different. Figure 2 The orientation of the cross-sectional view shown. Therefore, Figure 8 The structure of the injection module 250 shown may be similar to Figure 2 The ones shown are slightly different. Specifically, Figure 8 The combination shown is of push rod 7500, actuator 7510, locking element 7520, rotating ring 7530, drive sleeve 7540, bolt and nut 7550, dosing plate 7560, button spring 7570, marking tube 7580 and threaded insert 7590.

[0068] In some embodiments, the locking element 7520 and the rotating ring 7530 may be coupled to each other. In some embodiments, the push rod 7500 may pass through the locking element 7520 and the rotating ring 7530, and the locking element 7520 and the rotating ring 7530 may cover the push rod 7500. In some embodiments, the tip of the push rod 7500 (e.g., at the distal end of the push rod 7500) may be coplanar with the surface of the rotating ring 7530 (e.g., at the distal end of the rotating ring 7530). Further reference Figure 2 When the push rod 7500 moves toward the cartridge module 120, the rotating ring 7530 can also move toward the cartridge module 120.

[0069] In some embodiments, the actuator 7510 may protrude from the marking tube 7580 and abut against the locking element 7520. Therefore, the actuator 7510 may be partially housed by the marking tube 7580. In some embodiments, the actuator 7510 may penetrate the drive sleeve 7540, bolt and nut 7550, and dosing plate 7560. Furthermore, the dosing plate 7560 may abut against the marking tube 7580 at its distal end. Therefore, in some embodiments, there may be no relative displacement between the dosing plate 7560 and the marking tube 7580 along the axis of the medical injection system 100.

[0070] In some embodiments, the marking tube 7580 may fully accommodate the drive sleeve 7540, bolt and nut 7550, dosing plate 7560, and button spring 7570, and may partially accommodate the actuator 7510 and push rod 7500. In some embodiments, the threaded insert 7590 may partially accommodate the marking tube 7580.

[0071] Please see Figure 9 , Figure 9 This is a perspective view of the assembly of the plunger 7500, driver 7510, driver sleeve 7540, and dosage plate 7560 of the medical injection system disclosed in embodiments of the present invention. Further reference... Figure 1 In some embodiments, the drive sleeve 7540 may include a first sleeve end 9541 facing the distal end 101 of the medical injection system 100 and a second sleeve end 9542 facing the proximal end 102 of the medical injection system 100. In some embodiments, the dosing plate 7560 may include a first plate end 9561 facing the distal end 101 of the medical injection system 100, a second plate end 9562 facing the proximal end 102 of the medical injection system 100, and a side surface 9563 located between the first plate end 9561 and the second plate end 9562.

[0072] In some embodiments, the first sleeve end 9541 may further include a plurality of sleeve teeth 95411. Furthermore, the second plate end 9562 may further include a plurality of plate teeth 95621 corresponding to the sleeve teeth 95411. In some embodiments, when the number of plate teeth 95621 is less than or equal to the number of sleeve teeth 95411, each plate tooth 95621 may correspond to one of the sleeve teeth 95411. In some embodiments, when the number of plate teeth 95621 is greater than or equal to the number of sleeve teeth 95411, each sleeve tooth 95411 may correspond to one of the plate teeth 95621. In some embodiments, the side surface 9563 may further include an elastic plate 9564 and surface teeth 9565 protruding from the elastic plate 9564.

[0073] Please see Figure 10 , Figure 10 This is a perspective view of the combination of a dosing plate 7560 and a marking tube 7580 in a medical injection system disclosed in embodiments of the present invention. In some embodiments, the marking tube 7580 may completely accommodate the dosing plate 7560. Further reference Figure 1 In some embodiments, the marking tube 7580 may include a first cannula end 10581 toward the distal end 101 of the medical injection system 100 and a second cannula end 10582 toward the proximal end 102 of the medical injection system 100.

[0074] In some embodiments, the marking tube 7580 may further include an internal protrusion 10583. In some embodiments, the internal protrusion 10583 may surround inwardly the inner surface of the marking tube 7580 (not shown) and may be located near the first sleeve end 10581. Further reference Figure 9 In some embodiments, the internal protrusion 10583 may contact the first plate end 9561 of the dosing plate 7560. Therefore, the dosing plate 7560 may be located between the internal protrusion 10583 and the second sleeve end 10582, and may be sandwiched between the internal protrusion 10583 and the first sleeve end 9541 of the drive sleeve 7540.

[0075] Please see Figure 11 , Figure 11 This is a cross-sectional view of the combination of a dosing plate 7560 and a marking tube 7580 in a medical injection system disclosed in embodiments of the present invention. In some embodiments, the marking tube 7580 may include a plurality of cannula recesses 11584.

[0076] In some embodiments, the cannula recess 11584 may surround inwardly the inner surface of the marking tube 7580. In some embodiments, the surface teeth 9565 of the dosing plate 7560 may correspond to one of the cannula recesses 11584. In some embodiments, the surface teeth 9565 may engage with one of the cannula recesses 11584. Therefore, further reference... Figure 9 and Figure 10 The sleeve recess 11584 may be located near the first sleeve end 10581, and between the internal protrusion 10583 and the first sleeve end 9541 of the drive sleeve 7540.

[0077] In some embodiments, the surface tooth 9565 may further include a first inclined surface 11566 having a first slope and a second inclined surface 11567 having a second slope (e.g., different from the first slope). The first and second slopes may be calculated based on the elastic plate 9564. Therefore, the second slope may be less than the first slope. In some embodiments, each sleeve recess 11584 may further include a third inclined surface (not shown) having a third slope and a fourth inclined surface (not shown) having a fourth slope. In some embodiments, the third slope may approximate the first slope, and the fourth slope may approximate the second slope. Therefore, the surface tooth 9565 may engage tightly with one of the sleeve recesses 11584.

[0078] In some embodiments, the marking tube 7580 is rotatable in a first rotation direction 1161 and a second rotation direction 1162. In some embodiments, when the marking tube 7580 rotates in the first rotation direction 1161, the cannula recess 11584 is also rotatable in the first rotation direction 1161. In some embodiments, the third inclined surface of the cannula recess 11584 is abutted against the first inclined surface 11566 of the surface teeth 9565. Therefore, since the values ​​of the first and third slopes are sufficiently large to allow the third inclined surface to push the first inclined surface 11566 to rotate without slippage between the first and third inclined surfaces, the dose plate 7560 can be rotated in the third rotation direction via the marking tube 7580. More specifically, the engagement between the first and third inclined surfaces locks the surface teeth 9565 of the dose plate 7560 onto the cannula recess 11584 of the marking tube 7580 to rotate the dose plate 7560 in the third rotation direction. In some embodiments, the third rotation direction of the dosing plate 7560 may be the same as the first rotation direction 1161 of the marking tube 7580. In some embodiments, the third rotation direction of the dosing plate 7560 may be the same as the second rotation direction 1162 of the marking tube 7580 when the value of the second slope is large enough to prevent slippage between the second inclined surface 11567 and the fourth inclined surface.

[0079] In some embodiments, when the marking tube 7580 rotates in the second rotation direction 1162, the cannula recess 11584 may also rotate in the second rotation direction 1162. In some embodiments, the fourth inclined surface of the cannula recess 11584 may abut against the second inclined surface 11567 of the surface teeth 9565. However, the values ​​of the second and fourth slopes may be small enough that the fourth inclined surface can press down on the second inclined surface 11567. Therefore, since the slippage between the second inclined surface 11567 and the fourth inclined surface may be due to the low slope, the dosing plate 7560 may not be rotated by the marking tube 7580 in the second rotation direction 1162. In other words, when the marking tube 7580 rotates in the second rotation direction 1162, the surface teeth 9565 may move between the plurality of cannula recesses 11584 via the second inclined surface 11567 without causing the dosing plate 7560 to rotate.

[0080] Please see Figure 12 , Figure 12This is a perspective view of the combination of a control knob 542, a sleeve support 543, and a marking tube 7580 of a medical injection system disclosed in embodiments of the present invention. In some embodiments, the control knob 542 may include an outer ring 12421, an inner ring 12422 located at the center of the outer ring 12421, a plurality of knob bridges 12423 coupling the outer ring 12421 to the inner ring 12422, and a knob protrusion 12424 projecting inward from the inner surface of the outer ring 12421. Further reference Figure 1 and Figure 6 The sleeve support 543 may include a first support connection portion 6431 that inserts into the second sleeve end 10582 and faces the distal end 101, and a second support connection portion 6432 that inserts into the inner ring 12422 and faces the proximal end 102. In some embodiments, the second sleeve end 10582 may also include a sleeve lock 12585 and a plurality of sleeve grooves 12586. In some embodiments, the marking tube 7580 may also include a sleeve thread 12587 located on the outer surface of the marking tube 7580.

[0081] Please see Figure 13 , Figure 13 This is a cross-sectional view of the combination of the control knob 542, sleeve bracket 543 and marking tube 7580 of the medical injection system disclosed in the embodiments of the present invention.

[0082] In some embodiments, when the control knob 542 is coupled to the marking tube 7580, the knob bridge 12423 of the control knob 542 can engage with the sleeve groove 12586 of the marking tube 7580, and the knob protrusion 12424 of the control knob 542 can engage with the sleeve lock 12585 of the marking tube 7580. Therefore, when the control knob 542 is rotated in one of the first rotation direction 1161 and the second rotation direction 1162 (e.g., by a user), the marking tube 7580 can also be rotated in one of the first rotation direction 1161 and the second rotation direction 1162 due to the engagement between the knob protrusion 12424 of the control knob 542 and the sleeve lock 12585 of the marking tube 7580.

[0083] In some embodiments, the inner surface of the inner ring 12422 may be smooth (e.g., without any protrusions and / or grooves). Therefore, when the user rotates the control knob 542 in one of the first rotation direction 1161 and the second rotation direction 1162, the sleeve support 543 can remain stationary because there is no engagement between the control knob 542 and the sleeve support 543.

[0084] In some embodiments, the control knob 542 is rotatable in a first rotation direction 1161 and a second rotation direction 1162. In some embodiments, when the user rotates the control knob 542 in the first rotation direction 1161, the marker tube 7580 can also be rotated in the first rotation direction 1161 via the control knob 542. Further reference Figure 11 When the control knob 542 is rotated in the first rotation direction 1161, the surface teeth 9565 are locked onto one of the sleeve recesses 11584 to rotate the dosing plate 7560 through the marking tube 7580. Further reference Figure 9 When the control knob 542, the marker tube 7580, and the dosage plate 7560 are rotated in the first rotation direction 1161, each plate tooth 95621 that meshes with one of the plurality of sleeve teeth 95411 can also be rotated to mesh with another sleeve tooth 95411. In some embodiments, since the sleeve support 543 remains stationary, the drive sleeve 7540 can remain stationary. Therefore, a first relative rotation can be generated between the dosage plate 7560 and the drive sleeve 7540. Furthermore, refer to... Figure 8 The button spring 7570 can continuously push the drive sleeve 7540, so that the drive sleeve 7540 can be pressed against the dosing plate 7560 through the button spring 7570. When the button spring 7570 pushes the sleeve tooth 95411 to strike the rotating plate tooth 95621, the plate tooth 95621 and the sleeve tooth 95411 can produce a first sound (e.g., sound) to indicate that rotation is taking place in the first rotation direction 1161.

[0085] In some embodiments, when the user rotates the control knob 542 in the second rotation direction 1162, the marking tube 7580 can also be rotated in the second rotation direction 1162 via the control knob 542. (See reference) Figure 11 When the control knob 542 is rotated in the second rotation direction 1162, the surface teeth 9565 can remain stationary, and the sleeve recess 11584 can rotate around the surface teeth 9565. Further reference. Figure 9When the control knob 542 and the marking tube 7580 are rotated in the second rotation direction 1162, the sleeve recess 11584 can be rotated to change the engagement target of the surface teeth 9565 from one sleeve recess 11584 to another. In some embodiments, because the sleeve support 543 remains stationary, the dosage plate 7560 and the drive sleeve 7540 can remain stationary. Therefore, a second relative rotation can be generated between the dosage plate 7560 and the marking tube 7580. Furthermore, the elastic plate 9564 may have sufficient elasticity to press the surface teeth 9565 back into one of the sleeve recesses 11584, so that the surface teeth 9565 can remain engaged with the sleeve recess 11584 through the elastic plate 9564. When the elastic plate 9564 presses the surface teeth 9565 to strike the sleeve recess 11584, a second sound (e.g., a different sound) different from the first sound can be generated by the surface teeth 9565 and the sleeve recess 11584 to indicate that rotation is taking place in the second rotation direction 1162.

[0086] In some embodiments, the threaded insert 7590 may include an internal thread located on the inner surface of the threaded insert 7590. (See reference) Figure 11 In some embodiments, the inner thread of the threaded insert 7590 can engage with the sleeve thread 12587. In some embodiments, when the control knob 542 is rotated in the first rotation direction 1161, the marking tube 7580 can also be rotated in the first rotation direction 1161, and can be directed towards the proximal end 102 of the medical injection system 100 (e.g., as shown in the first thread direction). Figure 1 (As shown) moves. In some embodiments, when the control knob 542 is rotated in the second rotation direction 1162, the marking tube 7580 can also rotate in the second rotation direction 1162 and move toward the distal end 101 of the medical injection system 100 based on the first thread direction.

[0087] In some embodiments, when the control knob 542 is rotated in the first rotation direction 1161, the marking tube 7580 can also rotate in the first rotation direction 1161 and move towards the distal end 101 of the medical injection system 100 based on a second thread direction opposite to the first thread direction. In some embodiments, when the control knob 542 is rotated in the second rotation direction 1162, the marking tube 7580 can also rotate in the second rotation direction 1162 and move towards the proximal end 102 of the medical injection system 100 based on the second thread direction.

[0088] In some implementations, the first thread direction may be one of a left-handed helix and a right-handed helix, and the second thread direction may be the other of a left-handed helix and a right-handed helix.

[0089] In some embodiments, when the dosage of the drug or medical fluid is adjusted to increase (e.g., by rotating the control knob 542 in the first rotation direction 1161), the marker tube 7580 can move toward the proximal end 102 of the medical injection system 100 and rotate in the first rotation direction 1161. Reference Figure 8 Because the dose plate 7560 can be placed close to the marking tube 7580, the dose plate 7560 can also be moved proximally to the end 102. Furthermore, see reference... Figure 9 Since the drive sleeve 7540 can be close to the dosing plate 7560, the drive sleeve 7540 can also move towards the proximal end 102. Furthermore, for example, when the dose of a drug or medical fluid is reduced by rotating the control knob 542 in the second rotation direction 1162, the marker tube 7580 can move towards the distal end 101 of the medical injection system 100 and rotate in the second rotation direction 1162.

[0090] In other embodiments, for example, when the dose of a drug or medical fluid is reduced by rotating the control knob 542 in the first rotation direction 1161, the marker tube 7580 may move toward the distal end 101 of the medical injection system 100 and rotate in the first rotation direction 1161. Furthermore, for example, when the dose of a drug or medical fluid is increased by rotating the control knob 542 in the second rotation direction 1162, the marker tube 7580 may move toward the proximal end 102 of the medical injection system 100 and rotate in the second rotation direction 1162.

[0091] In some embodiments, when the control knob 542 is rotated to adjust the dosage, the sleeve support 543 may remain stationary and remain in place because there is no engagement between the control knob 542 and the sleeve support 543. Therefore, the drive sleeve 7540, the actuator 7510, the locking element 7520, the rotating ring 7530, and the push rod 7500 may also remain stationary and remain in place.

[0092] Please see Figure 14 , Figure 14 This is a perspective view of the combination of the drive sleeve 7540 and the bolt and nut 7550 of the medical injection system disclosed in the embodiments of the present invention. In some embodiments, the drive sleeve 7540 may further include a positioning structure 14543 and a sleeve thread 14544.

[0093] In some embodiments, the sleeve thread 14544 of the drive sleeve 7540 may engage with the bolt nut 7550. Therefore, the bolt nut 7550 can rotate on the sleeve thread 14544 of the drive sleeve 7540. In some embodiments, a positioning structure 14543 may be located between the sleeve thread 14544 and the sleeve teeth 95411 to define the initial position of the bolt nut 7550.

[0094] In some embodiments, the positioning structure 14543 may further include a positioning protrusion 14543a and a plurality of positioning recesses 14543b. In some embodiments, the positioning protrusion 14543a may protrude outward from the outer surface of the first sleeve end 9541 of the drive sleeve 7540 and be located near the sleeve thread 14544. In some embodiments, the positioning recesses 14543b may be coupled to the positioning protrusion 14543a.

[0095] Please see Figure 15 , Figure 15 This is a cross-sectional view of the combination of the drive sleeve 7540 and the bolt and nut 7550 of the medical injection system disclosed in the embodiments of the present invention. Figure 15 The orientation of the cross-sectional view shown may be different. Figure 2 and Figure 8 The orientation of the cross-sectional view shown. Therefore, Figure 15 The structure of the drive sleeve 7540 and bolt and nut 7550 shown may be similar to Figure 2 and Figure 8 The structure shown is slightly different. In some embodiments, the bolt nut 7550 may include a nut thread 15551 projecting inward from the inner surface of the bolt nut 7550.

[0096] In some embodiments, the nut thread 15551 can engage with the sleeve thread 14544, so that the nut thread 7550 can rotate on the drive sleeve 7540 through the engagement between the nut thread 15551 and the sleeve thread 14544. Furthermore, in some embodiments, the number of positioning recesses 14543b can be equal to two, so that the positioning protrusion 14543a can be sandwiched between the positioning recesses 14543b.

[0097] Please see Figure 16 , Figure 16 This is another cross-sectional view of the combination of the drive sleeve 7540 and bolt and nut 7550 of the medical injection system disclosed in the embodiments of the present invention. Figure 16 The direction of the cross-sectional view shown can be perpendicular to Figure 15 The orientation of the cross-sectional view shown. In some embodiments, the bolt nut 7550 may include a nut groove 16552 recessed from the inner surface of the bolt nut 7550 and a nut notch 16553 recessed from the outer surface of the bolt nut 7550.

[0098] In some embodiments, the nut groove 16552 may engage with the positioning protrusion 14543a (e.g., as shown in the image). Figure 14 and Figure 15(As shown), to determine the initial position of the bolt and nut 7550. In some embodiments, the shape of the positioning protrusion 14543a may be similar to the shape of the nut groove 16552. Therefore, when the nut groove 16552 corresponds to the positioning protrusion 14543a, the drive sleeve 7540 can be inserted into the bolt and nut 7550.

[0099] In some embodiments, the positioning protrusion 14543a may include a fifth inclined surface 16543c having a fifth slope and a sixth inclined surface 16543d having a sixth slope that may be different from the fifth slope. In some embodiments, the fifth and sixth slopes may be calculated based on the outer surface of the first sleeve end 9541 of the drive sleeve 7540. Therefore, the sixth slope may be less than the fifth slope. In some embodiments, the nut groove 16552 may also include a seventh inclined surface (not shown) having a seventh slope and an eighth inclined surface (not shown) having an eighth slope. In some embodiments, the fifth slope may approximate the seventh slope, and the sixth slope may approximate the eighth slope. Therefore, the positioning protrusion 14543a may engage tightly with the nut groove 16552.

[0100] In some implementations, reference Figure 15 and Figure 16 After the drive sleeve 7540 is inserted into the bolt nut 7550, the bolt nut 7550 can stop in its initial position when the nut thread 15551 contacts the sleeve thread 14544. When the bolt nut 7550 is in its initial position, it can partially cover the positioning protrusion 14543a. In other words, a portion of the positioning protrusion 14543a may not be covered by the bolt nut 7550 and may protrude from it.

[0101] In some embodiments, when the bolt and nut 7550 is in the initial position, the locating protrusion 14543a may partially engage with the nut recess 16552. Therefore, due to the partial engagement between the locating protrusion 14543a and the nut recess 16552, rotating the bolt and nut 7550 on the drive sleeve 7540 may not be easy. However, in some embodiments, the values ​​of the sixth and eighth slopes may be small enough that the eighth inclined surface can press down on the sixth inclined surface 16543d. In some embodiments, the locating protrusion 14543a may be resilient because it is sandwiched between the locating recesses 14543b. Therefore, when the bolt and nut 7550 rotates away from the locating protrusion 14543a, the pressure generated through the nut recess 16552 or the inner surface of the bolt and nut 7550 can be released, and the locating protrusion can return to its original position. In other words, when a force is applied to rotate the bolt nut 7550 (e.g., generated by the user), the nut groove 16552 is still able to overcome the interference of the positioning protrusion 14543a. The bolt nut 7550 can then begin to rotate on the drive sleeve 7540 and move away from its initial position near the positioning protrusion 14543a. In some embodiments, the bolt nut 7550 can rotate freely when the positioning structure 14543 is not present. Therefore, the bolt nut 7550 may not have an initial position that can be secured before using the medical injection system 100.

[0102] Further reference Figure 7 and Figure 12 In some embodiments, the nut notch 16553 can engage with the marking tube 7580. Therefore, when the marking tube 7580 is rotated in one of the first rotation direction 1611 and the second rotation direction 16125 by the control knob 542 to move toward the distal end 101 of the medical injection system 100, the bolt nut 7550 can also be rotated in said one of the first rotation direction 1611 and the second rotation direction 1612 to move toward the distal end 101. Furthermore, when the marking tube 7580 is rotated in the other direction of the first rotation direction 1611 and the second rotation direction 1612 to move toward the proximal end 102 of the medical injection system 100 by the control knob 542, the bolt nut 7550 can also be rotated in said other direction of the first rotation direction 1611 and the second rotation direction 1612 to move toward the proximal end 102.

[0103] Furthermore, when the drive sleeve 7540 is rotated in one of the first rotation direction 1611 and the second rotation direction 1612 via control button 541 to inject a drug or medical fluid, the marking tube 7580 can also rotate in said one of the first rotation direction 1611 and the second rotation direction 1612. In some embodiments, when the drive sleeve 7540 and the marking tube 7580 rotate together, the bolt nut 7550 clamped between the drive sleeve 7540 and the marking tube 7580 can remain stationary. Therefore, rotation of the bolt nut 7550 can be used to control the maximum dosage via control knob 542.

[0104] In conclusion, this invention meets the requirements for an invention patent, and therefore a patent application is filed in accordance with the law. However, the above description is only a preferred embodiment of this invention, and any equivalent modifications or variations made by those skilled in the art in accordance with the spirit of this invention should be included within the scope of the following patent application.

Claims

1. A medical injection system, characterized in that, The medical injection system includes: Injection module, wherein the injection module includes: A push rod that can move along the axial direction of the medical injection system; A driver configured to partially surround the push rod and capable of rotating with the push rod; A drive sleeve configured to partially surround the driver and having a first sleeve end facing the distal end of the medical injection system, wherein the first sleeve end has a plurality of sleeve teeth. A dosing plate includes a first plate end facing the distal end, a second plate end facing the proximal end of the medical injection system, and a side surface located between the first plate end and the second plate end, wherein the second plate end has a plurality of plate teeth corresponding to the plurality of sleeve teeth, and the side surface has surface teeth; and A marking tube, configured to surround the drive sleeve and the dosing plate, and having a plurality of cannula recesses and a first cannula end facing the distal end, wherein: The plurality of cannula recesses are adjacent to the first cannula end, and the surface teeth of the dosing plate correspond to one of the plurality of cannula recesses. A first sound is produced between the plurality of plate teeth and the plurality of sleeve teeth, and a second sound is produced between the surface teeth and the plurality of sleeve recesses, the second sound being different from the first sound; and A cartridge module coupled to the injection module, wherein the push rod is configured to move along the axial direction into the cartridge module.

2. The medical injection system according to claim 1, characterized in that: Each of the plurality of plate teeth engages with one of the plurality of sleeve teeth; and The surface teeth engage with one of the plurality of sleeve recesses.

3. The medical injection system according to claim 1, characterized in that, This medical injection system further includes: A control knob, which is coupled to the marking tube, and is capable of rotating in a first rotation direction and a second rotation direction; When the control knob is rotated in the first rotation direction, each of the plurality of plate teeth rotates from engaging with one of the plurality of sleeve teeth to engaging with another of the plurality of sleeve teeth; and When the control knob is rotated in the second rotation direction, the plurality of sleeve recesses rotate, causing the engagement target of the surface teeth to change from one of the plurality of sleeve recesses to another of the plurality of sleeve recesses.

4. The medical injection system according to claim 3, characterized in that: The first sound indicates that the rotation is proceeding in the first direction; and The second sound indicates that the rotation is occurring in the second direction.

5. The medical injection system according to claim 3, characterized in that: When the control knob is rotated in the first rotation direction, the marking tube moves toward the proximal end of the medical injection system; and When the control knob is rotated in the second rotation direction, the marking tube moves toward the distal end of the medical injection system.

6. The medical injection system according to claim 3, characterized in that: The surface tooth includes a first inclined surface having a first slope and a second inclined surface having a second slope, wherein the first slope and the second slope are different; The first inclined surface is configured to lock the surface teeth in one of the plurality of sleeve recesses so that the dosing plate can be rotated in a third rotational direction through the marking tube; as well as When the marking tube is rotated, the surface teeth can move between the plurality of sleeve recesses via the second inclined surface without rotating the dosing plate.

7. The medical injection system according to claim 6, characterized in that: When the control knob is rotated in the first rotation direction, the surface teeth lock into one of the plurality of sleeve recesses to rotate the dosage plate through the marking tube; as well as When the control knob rotates in the second rotation direction, the surface teeth remain stationary, and the plurality of sleeve recesses rotate around the surface teeth.

8. The medical injection system according to claim 6, characterized in that, The third rotation direction is the same as one of the first rotation direction and the second rotation direction.

9. The medical injection system according to claim 1, characterized in that, This medical injection system further includes: A control knob, coupled to the marking tube, is rotatable in a first rotation direction and a second rotation direction, wherein: When the control knob is rotated in the first rotation direction, the marking tube rotates the dosage plate, while the drive sleeve remains stationary; and When the control knob rotates the marking tube in the second rotation direction, the dosage plate and the drive sleeve remain stationary, wherein the first rotation direction is different from the second rotation direction.

10. The medical injection system according to claim 9, characterized in that: When the control knob rotates the marking tube in the first rotation direction, the first relative rotation between the dosage plate and the drive sleeve produces the first sound; as well as When the control knob rotates the marking tube in the second rotation direction, the second relative rotation between the dosage plate and the marking tube produces the second sound.

11. The medical injection system according to claim 1, characterized in that, This medical injection system further includes: Bolts and nuts, which engage with the drive sleeve.

12. The medical injection system according to claim 11, characterized in that, The drive sleeve further includes: A sleeve thread that engages with the bolt and nut, wherein the bolt and nut are rotatable on the sleeve thread; and A positioning structure is located between the sleeve thread and the plurality of sleeve teeth and is configured to define the initial position of the bolt and nut.

13. The medical injection system according to claim 12, characterized in that, This positioning structure further includes: The positioning protrusion protrudes outwards near the sleeve thread; and Multiple positioning recesses are coupled to the positioning protrusion, wherein the positioning protrusion is sandwiched between at least two of the multiple positioning recesses.

14. The medical injection system according to claim 13, characterized in that, The bolt and nut further include: A nut thread that engages with the sleeve thread and rotates the bolt and nut on the drive sleeve; and The nut groove engages with the positioning protrusion to define the initial position.

15. The medical injection system according to claim 1, characterized in that, The marking tube further includes: An internal protrusion surrounds the inner surface of the marking tube and is adjacent to the first sleeve end, wherein: The internal protrusion contacts the first plate end of the dosing plate, and The dosing plate is located between the internal protrusion and the second end of the marking tube facing the proximal end.

16. A medical injection system, characterized in that, The medical injection system includes: Injection module, wherein the injection module includes: A push rod that can move along the axial direction of the medical injection system; A drive sleeve configured to partially surround the push rod and having a first sleeve end facing the distal end of the medical injection system, wherein the first sleeve end has a plurality of sleeve teeth; A dosing plate includes a first plate end facing the distal end, a second plate end facing the proximal end of the medical injection system, and a side surface located between the first plate end and the second plate end, wherein the second plate end has a plurality of plate teeth corresponding to the plurality of sleeve teeth, and the side surface has surface teeth; and A marking tube, configured to surround the drive sleeve and the dosing plate, and having a plurality of cannula recesses and a first cannula end facing the distal end, wherein: A first sound is produced between the teeth of the multiple plates and the teeth of the multiple sleeves, and a second sound is produced between the surface teeth and the multiple sleeve recesses. This second sound is different from the first sound. The multiple sleeve recesses are adjacent to the first sleeve end. The surface teeth of the dosing plate correspond to one of the plurality of cannula recesses and include a first inclined surface with a first slope and a second inclined surface with a second slope. The first slope is different from the second slope; and A cartridge module coupled to the injection module, wherein the push rod is configured to move along the axial direction into the cartridge module.

Images