Insulin injection pen

Abstract

The utility model provides an insulin injection pen, and belongs to the technical field of injection pens. An operation unit including a housing; the injection pen further comprises a connecting piece and a separating piece which are arranged in the shell, the connecting piece is detachably connected with the medicine bin, the separating piece is connected with the shell, in the normal use process of the injection pen, the relative positions of the connecting piece and the separating piece are not changed, and the connecting position of the connecting piece and the medicine bin is located in the shell. A first threaded hole is formed in the connecting piece, a second threaded hole is formed in the separating piece, the first threaded hole and the second threaded hole are coaxial, and the medicine bin, the connecting piece and the separating piece are sequentially arranged and distributed; the material pushing screw rod is located in the shell and is in threaded connection with the first threaded hole and the second threaded hole, and a separation part is arranged at the first end of the material pushing screw rod; the device has the advantages that after the medicine bin is separated from the shell, the joint of the connecting piece and the medicine bin is exposed in the view field, the connecting piece and the medicine bin can be separated by disconnecting the connecting piece and the medicine bin, the operation unit and the medicine bin which are made of different materials can be treated or recycled according to the material characteristics, and environmental protection is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of injection pen technology, and in particular relates to an insulin injection pen. Background Technology

[0002] Insulin pens, as a commonly used drug delivery device, are widely used in the daily treatment of diabetes. Traditional insulin injection devices typically consist of a cartridge containing insulin and a mechanical structure for propelling the solution. However, early insulin injectors often required users to manually draw and inject the medication, a process that was not only time-consuming and laborious but also increased the difficulty of operation and the risk of errors. To simplify the operation and improve injection accuracy, insulin pens were developed.

[0003] The advent of insulin pens has greatly improved the user experience, but there are still some inconveniences in practical applications. With the increasing awareness of environmental protection, how to properly dispose of used disposable medical devices has become an urgent problem to be solved. Since insulin pens are usually made of a variety of different materials (such as plastic shells, glass capsules, etc.), if these components cannot be effectively separated and processed, it will increase recycling costs and may lead to waste of resources. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an insulin pen that can be disassembled, sorted, and recycled after use.

[0005] The objective of this utility model can be achieved through the following technical solution: an insulin injection pen, comprising:

[0006] Medicine warehouse;

[0007] The operating unit includes a housing;

[0008] It also includes a connector and a release member disposed within the outer casing. The connector is detachably connected to the drug cartridge, and the release member is connected to the outer casing. During normal use of the injection pen, the relative positions of the connector and the release member remain unchanged. The connection between the connector and the drug cartridge is located inside the outer casing. The connector is provided with a first threaded hole, and the release member is provided with a second threaded hole. The first threaded hole and the second threaded hole are coaxial. The drug cartridge, the connector, and the release member are arranged sequentially.

[0009] A pusher screw is located inside the housing. The pusher screw is threadedly connected to the first threaded hole and the second threaded hole. A release part is provided at the first end of the pusher screw. When the release part runs into the second threaded hole, the pusher screw disconnects from the release part, and the connecting part disconnects from the release part.

[0010] In the aforementioned insulin injection pen, the release part includes a release rod integrally disposed at the first end of the pusher screw.

[0011] In the aforementioned insulin pen, after the liquid in the cartridge is completely expelled, the disengagement part on the pusher screw moves into the second threaded hole.

[0012] In the aforementioned insulin injection pen, the straight-line distance between the extrusion end face of the extrusion piston in the drug chamber and the bottom wall of the drug chamber is equal to the straight-line distance between the screw connection point of the pusher screw and the second threaded hole and the disengagement part.

[0013] In the aforementioned insulin pen, one of the connector and the detachment is provided with a limiting protrusion, and the other of the connector and the detachment is provided with a limiting insertion hole. When the connector and the detachment are in contact, the limiting protrusion extends into the limiting insertion hole. When the limiting protrusion is in contact with the wall of the limiting insertion hole, it prevents the connector and the detachment from rotating relative to each other.

[0014] In the aforementioned insulin pen, the first end of the limiting protrusion is connected to one of the connecting member and the disengaging member, while the second end of the limiting protrusion is a movable end, which is integrally provided with a snap-fit ​​part, and the other of the connecting member and the disengaging member is provided with a protrusion.

[0015] In the aforementioned insulin pen, the cartridge and the connector are snap-fitted together, allowing the connector and the cartridge to remain fixed while also being detachable.

[0016] In the aforementioned insulin pen, two elastic buckles are fixedly provided at the end of the connector, with a gap between the two elastic buckles. A connecting recess is provided on the outer wall of the drug cartridge, and two connecting blocks are symmetrically arranged in the connecting recess. The buckle ends of the two elastic buckles extend into the connecting recess and are connected to the corresponding connecting blocks.

[0017] In the aforementioned insulin pen, the outer surface of the elastic buckle is parallel to the main axis of the connector, and the outer surface of the elastic buckle is flush with the outer surface of the connector.

[0018] In the aforementioned insulin pen, a sound-emitting ring is integrally provided at the end of the release member. Sound-emitting teeth are provided on the inner ring wall of the sound-emitting ring, which mesh with the pendulum. The pendulum rotates relative to the sound-emitting teeth to produce sound.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] (1) When the medicine compartment is separated from the outer shell, the connection between the connector and the medicine compartment is exposed in the field of vision. The separation of the two can be achieved by disconnecting the connector from the medicine compartment. The operating unit and medicine compartment of different materials can be processed or recycled according to their material properties, which is conducive to environmental protection.

[0021] (2) As insulin is completely pushed out of the drug tank, the pusher screw will continue to advance along its axis to ensure that all drugs are accurately injected into the patient. During this process, the detachment part at the end of the pusher screw gradually approaches and eventually enters the second threaded hole on the detachment part, and will no longer maintain a threaded connection with the detachment part, so that the threaded connection between the pusher screw and the detachment part is released, ensuring complete drug injection, and also facilitating the cleaning, maintenance and environmental protection of the equipment. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 yes Figure 1 One of the schematic diagrams of the cross-sectional structure;

[0024] Figure 3 yes Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0025] Figure 4 yes Figure 1 The second schematic diagram of the cross-sectional structure;

[0026] Figure 5 yes Figure 1 Internal structure diagram;

[0027] Figure 6 This is an exploded structural diagram of the connecting and disengaging parts;

[0028] Figure 7 yes Figure 6 A three-dimensional structural diagram of the connecting component;

[0029] Figure 8 yes Figure 6 A three-dimensional structural diagram of the detachment component;

[0030] Figure 9 This is a three-dimensional structural diagram of the pusher screw in this utility model;

[0031] Figure 10 This is a three-dimensional structural diagram of the medicine storage area.

[0032] In the diagram, 100 is the medicine chamber; 101 is the extrusion piston; 102 is the connecting recess; 103 is the connecting block; 200 is the outer shell; 300 is the connector; 301 is the release part; 302 is the first threaded hole; 303 is the second threaded hole; 304 is the limiting protrusion; 305 is the limiting insertion hole; 306 is the snap-fit ​​part; 307 is the protrusion; 308 is the elastic buckle; 309 is the sound ring; 310 is the sound tooth; 400 is the pusher screw; and 401 is the release part. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] like Figures 1-10 As shown, an insulin pen includes:

[0036] Medicine warehouse 100;

[0037] An operating unit, which includes a housing 200;

[0038] It also includes a connector 300 and a release member 301 disposed within the outer casing 200. The connector 300 is detachably connected to the drug cartridge 100, and the release member 301 is connected to the outer casing 200. During normal use of the injection pen, the relative positions of the connector 300 and the release member 301 remain unchanged. The connection between the connector 300 and the drug cartridge 100 is located within the outer casing 200. The connector 300 is provided with a first threaded hole 302, and the release member 301 is provided with a second threaded hole 303. The first threaded hole 302 and the second threaded hole 303 are coaxial. The drug cartridge 100, the connector 300, and the release member 301 are arranged in sequence.

[0039] The pusher screw 400 is located inside the housing 200. The pusher screw 400 is threadedly connected to the first threaded hole 302 and the second threaded hole 303. The first end of the pusher screw 400 is provided with a release part 401. When the release part 401 runs into the second threaded hole 303, the pusher screw 400 is disconnected from the release part 301, and the connecting part 300 is disconnected from the release part 301.

[0040] In this embodiment, during the use of the injection pen, the pusher screw 400 not only pushes out the liquid in the drug tank 100, but also the threaded connection between the pusher screw 400 and the connector 300 and the release part 301 prevents the connector 300 and the release part 301 from being separated. As the liquid in the drug tank 100 is pushed out, the pusher screw 400 moves along its axial direction, and its position relative to the connector 300 and the release part 301 changes. The release part 401 gradually approaches the second threaded hole 303 until it extends into the second threaded hole 303. At this time, the pusher screw 400 disengages from the second threaded hole 303, and the connector 300 and the release part 401 can be separated. The connector 300 and the drug tank 100 are considered as an independent whole, and the release part 301 and the outer shell 200 are considered as an independent whole. The two parts are separated from each other to achieve the separation of the drug tank 100 and the outer shell 200.

[0041] It should be noted that when the medicine container 100 is connected to the outer shell 200, the connection between the connector 300 and the medicine container 100 is located under the enclosure of the outer shell 200. At this time, there is no operating space between the two and they cannot be separated. However, when the medicine container 100 is separated from the outer shell 200, the connection between the connector 300 and the medicine container 100 is exposed. Disconnecting the connector 300 from the medicine container 100 can achieve separation of the two. The operating units and medicine container 100 parts made of different materials can be processed or recycled according to their material properties, which is conducive to environmental protection.

[0042] like Figure 9 As shown, specifically, the detachment part 401 includes a detachment guide rod integrally disposed at the first end of the pusher screw 400. By directly setting the detachment guide rod as part of the pusher screw 400 without using an additional connection method, and forming an integral structure, the separation process between the pusher screw 400 and the second threaded hole 303 is simpler and more efficient. After the injection operation is completed, as the pusher screw 400 advances further, the detachment guide rod can smoothly pass through the second threaded hole 303 on the detachment part 301, thereby realizing the separation of the connector 300 and the detachment part 301.

[0043] like Figure 4 As shown, in a further preferred embodiment, after the liquid in the medicine tank 100 is completely pushed out, the disengagement part 401 on the pusher screw 400 moves into the second threaded hole 303.

[0044] In this embodiment, as insulin is fully ejected from the drug reservoir 100, the pusher screw 400 continues to advance along its axial direction to ensure that all medication is accurately injected into the patient. During this process, the detachment part 401 at the end of the pusher screw 400 (such as the detachment smooth rod integrally set at the first end of the pusher screw 400 mentioned earlier) gradually approaches and eventually enters the second threaded hole 303 on the detachment member 301. Since the detachment part 401 is a smooth, threadless design, after it enters the second threaded hole 303, it will no longer maintain a threaded connection with the detachment member 301, thereby releasing the threaded connection between the pusher screw 400 and the detachment member 301, ensuring complete injection of medication, and facilitating the cleaning, maintenance, and environmental protection of the equipment.

[0045] It should be noted that the above effect can be achieved when the straight-line distance l1 between the extrusion end face of the extrusion piston 101 in the medicine chamber 100 and the bottom wall of the medicine chamber 100 is equal to the straight-line distance l2 between the screw connection point of the pusher screw 400 and the second threaded hole 303 and the disengagement part 401.

[0046] like Figures 3-6 As shown, preferably, one of the connector 300 and the detachment member 301 is provided with a limiting protrusion 304, and the other of the connector 300 and the detachment member 301 is provided with a limiting insertion hole 305. When the connector 300 and the detachment member 301 are in contact, the limiting protrusion 304 extends into the limiting insertion hole 305. When the limiting protrusion 304 is in contact with the wall of the limiting insertion hole 305, it prevents the connector 300 and the detachment member 301 from rotating relative to each other.

[0047] In this embodiment, as an optional solution, the connector 300 is provided with a limiting hole 305, and the limiting protrusion 304 is located on the detachment member 301. The cooperation between the limiting protrusion 304 and the limiting hole 305 causes the limiting protrusion 304 to abut against the wall of the limiting hole 305, thereby effectively preventing relative rotation between the connector 300 and the detachment member 301. Although the above locking mechanism can prevent unnecessary rotation, when it is necessary to separate the connector 300 and the detachment member 301, the insertion and cooperation between the limiting protrusion 304 and the limiting hole 305 allows the user to easily separate the two, which not only meets daily use but also facilitates later recycling.

[0048] More preferably, the first end of the limiting protrusion 304 is connected to one of the connecting member 300 and the disengaging member 301, while the second end of the limiting protrusion 304 is a movable end. The second end of the limiting protrusion 304 is integrally provided with a snap-fit ​​part 306, while the other of the connecting member 300 and the disengaging member 301 is provided with a protrusion 307.

[0049] In this embodiment, the connector 300 is provided with a limiting insertion hole 305, and the limiting protrusion 304 is located on the disengaging member 301. The second end of the limiting protrusion 304 is a movable end, which can undergo elastic deformation. The movable end is integrally provided with a snap-fit ​​part 306, and the protrusion 307 is provided on the inner wall of the limiting insertion hole 305. During the assembly process of the injection pen, the connector 300 and the disengaging member 301 can be pre-assembled to form a whole. By applying a slight pulling force to the connector 300 and the disengaging member 301, the two can be separated.

[0050] It is worth mentioning that the connector 300 and the detachment member 301 are also provided with abutting ribs, and the abutting ribs of the two abut against each other can also prevent the two from shifting.

[0051] Preferably, the medicine container 100 and the connector 300 are snap-fitted together, so that the connector 300 and the medicine container 100 can be fixed together, and the two can be disassembled.

[0052] More preferably, the end of the connector 300 is fixedly provided with two elastic buckles 308, and there is a gap between the two elastic buckles 308. The outer wall of the medicine container 100 is provided with a connecting recess 102, and two connecting blocks 103 are symmetrically arranged in the connecting recess 102. The buckling ends of the two elastic buckles 308 extend into the connecting recess 102 and are buckled and connected with the corresponding connecting blocks 103.

[0053] In this embodiment, two elastic buckles 308 form a buckle connection with the connecting block 103 on the outer wall of the medicine container 100 through their buckle ends, which can effectively prevent relative movement or loosening between the medicine container 100 and the connector 300. During use, even if subjected to a certain external force, the medicine container 100 and the connector 300 remain firmly connected, thereby improving the reliability of the entire device. When it is necessary to disconnect the connection between the two, the two elastic buckles 308 are pinched together to bring them closer to each other, and the connection with the connecting block can be disengaged.

[0054] Specifically, the end of the connector 300 is symmetrically provided with two sets of elastic buckles 308, each set of elastic buckles 308 including two elastic buckles 308.

[0055] Further preferably, the length extension direction of the elastic buckle 308 is parallel to the main axis of the connector 300, and the outer surface of the elastic buckle 308 is flush with the outer surface of the connector 300. In this way, when the outer shell 200 is connected to the medicine tank 100, there will be no gap between the outer shell 200, the medicine tank 100, and the connector 300, thus avoiding the outer shell 200 from breaking due to collision. Moreover, by designing the elastic buckle 308 to be flush with the outer surface of the connector 300, the internal space of the connector 300 can be better utilized, providing more layout space for other functional components (such as the pusher screw 400, the release member 301, etc.), thereby optimizing the internal structural design of the entire device.

[0056] It should be noted that the outer surface of the elastic buckle 308, the outer surface of the release part 401, and the outer surface of the connecting end of the medicine tank 100 are located on the same arc-shaped surface.

[0057] It is worth mentioning that the detachable part 301 is snap-fitted to the outer casing 200, which facilitates its production and assembly.

[0058] Preferably, a sound-generating ring 309 is integrally provided at the end of the detachment member 301. A sound-generating tooth 310 is provided on the inner ring wall of the sound-generating ring 309 to engage with the pendulum. The pendulum rotates relative to the sound-generating tooth 310 to generate sound.

[0059] In this embodiment, the sound-generating ring 309 is directly integrated into the release member 301, eliminating the need for an additional independent sound-generating device, thereby reducing the number and complexity of components. At the same time, since the sound-generating ring 309 is integrated into the release member 301, there is no need for additional space to install an independent sound-generating device, making the entire injection pen structure more compact and easier to carry and use.

[0060] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0062] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An insulin injection pen, characterized in that, include: Medicine warehouse; The operating unit includes a housing; It also includes a connector and a release member disposed within the outer casing. The connector is detachably connected to the drug cartridge, and the release member is connected to the outer casing. During normal use of the injection pen, the relative positions of the connector and the release member remain unchanged. The connection between the connector and the drug cartridge is located inside the outer casing. The connector is provided with a first threaded hole, and the release member is provided with a second threaded hole. The first threaded hole and the second threaded hole are coaxial. The drug cartridge, the connector, and the release member are arranged sequentially. A pusher screw is located inside the housing. The pusher screw is threadedly connected to the first threaded hole and the second threaded hole. A release part is provided at the first end of the pusher screw. When the release part runs into the second threaded hole, the pusher screw disconnects from the release part, and the connecting part disconnects from the release part.

2. The insulin injection pen according to claim 1, characterized in that, The detachment section includes a detachment guide rod integrally disposed at the first end of the pusher screw.

3. An insulin injection pen according to claim 1, characterized in that, Once the liquid in the medicine tank has been completely expelled, the disengagement part on the pusher screw moves into the second threaded hole.

4. An insulin injection pen according to claim 3, characterized in that, The straight-line distance between the extrusion end face of the extrusion piston in the medicine chamber and the bottom wall of the medicine chamber is equal to the straight-line distance between the screw connection point of the pusher screw and the second threaded hole and the disengagement part.

5. An insulin injection pen according to claim 1, characterized in that, One of the connecting member and the disengaging member is provided with a limiting protrusion, and the other of the connecting member and the disengaging member is provided with a limiting insertion hole. When the connecting member and the disengaging member are in contact, the limiting protrusion extends into the limiting insertion hole. When the limiting protrusion is in contact with the wall of the limiting insertion hole, it prevents the connecting member and the disengaging member from rotating relative to each other.

6. An insulin injection pen according to claim 5, characterized in that, The first end of the limiting protrusion is connected to one of the connecting member and the disengaging member, while the second end of the limiting protrusion is a movable end, which is integrally provided with a snap-fit ​​part, and the other of the connecting member and the disengaging member is provided with a protrusion.

7. An insulin injection pen according to claim 1, characterized in that, The medicine container and the connector are snap-fitted together, so that the connector and the medicine container can be fixed together, and the two can be disassembled.

8. An insulin injection pen according to claim 7, characterized in that, Two elastic buckles are fixedly provided at the end of the connector, and there is a gap between the two elastic buckles. A connecting recess is provided on the outer wall of the medicine compartment. Two connecting blocks are symmetrically arranged in the connecting recess. The buckle ends of the two elastic buckles extend into the connecting recess and are connected to the corresponding connecting blocks.

9. An insulin injection pen according to claim 8, characterized in that, The outer surface of the elastic buckle is parallel to the main axis of the connector, and the outer surface of the elastic buckle is flush with the outer surface of the connector.

10. An insulin injection pen according to claim 1, characterized in that, The end of the detachment component is integrally provided with a sound-generating ring, and the inner ring wall of the sound-generating ring is provided with sound-generating teeth that mesh with the pendulum. The pendulum rotates relative to the sound-generating teeth to generate sound.

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