A safety device for the drug storage bin of a fully automatic insulin injection pen

Abstract

The present invention discloses a drug storage bin safety device for a fully automatic insulin injection pen, which comprises a fixed seat, a drug storage bin and a driving rod, a toggle switch is arranged on the fixed seat, one end of the drug storage bin is rotatably mounted on the fixed seat through a first rotating shaft, a buckle is arranged at the bottom of the other end, the driving rod is movably mounted in a driving sleeve, the end of the driving sleeve is telescopically equipped with a limiting ring, a first elastic member is arranged between the limiting ring and the driving sleeve, the driving rod passes through the limiting ring and its head radius is larger than the inner hole of the limiting ring, a sliding plate is arranged on the fixed seat, a clamping hole is provided on the sliding plate to cooperate with the buckle, and a transmission component for disengaging the buckle from the clamping hole is arranged between the limiting ring and the sliding plate. The above-mentioned drug storage bin safety device is not only simple in structure, but also convenient and quick in changing medicines; and the drug storage bin can only be opened after the injection needle is removed and the driving rod is fully retracted into place, thereby improving the safety and reliability of the fully automatic injector.

Description

Technical Field

[0001] The invention relates to a full-automatic insulin injection pen, in particular to a medicine storage bin safety device of the full-automatic insulin injection pen. Background Art

[0002] Most existing fully automatic electronic insulin pens are fully automated. In recent years, side-flip syringes with medication loading have been designed and developed. These devices eliminate repeated disassembly of the housing, facilitate medication changes, and extend the lifespan of the electronic pen. However, these side-flip syringes lack safety features for opening and closing the medication reservoir, leading to frequent misuse during use. For example, users can easily make mistakes when changing medications, such as replacing a medication bottle without removing the needle, potentially causing secondary injuries. Users can also open the medication reservoir before the actuator lever has fully retracted, potentially damaging the actuator lever. Summary of the Invention

[0003] The purpose of the present invention is to provide a drug storage chamber safety device for a fully automatic insulin injection pen, so as to solve the problem in the prior art that side flip-cover loading type fully automatic injectors are prone to misoperation when the drug storage chamber is opened.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A drug storage tank safety device for a fully automatic insulin injection pen comprises a fixing seat, a drug storage tank and a driving rod, wherein a toggle switch is provided on the fixing seat, one end of the drug storage tank is rotatably mounted on the fixing seat via a first rotating shaft, and a buckle is provided at the bottom of the other end, and the driving rod is movably mounted in a driving sleeve, wherein the end of the driving sleeve is telescopically equipped with a limiting ring, and a first elastic member for pushing the limiting ring to move toward the drug storage tank is provided between the limiting ring and the driving sleeve, the driving rod passes through the limiting ring and the radius of its head is larger than the inner hole of the limiting ring, and a second rotating shaft is rotatably provided on the fixing seat. There is a driving rocker arm, and a second elastic member for resetting the driving rocker arm is installed on the second rotating shaft. A limit block is provided at the bottom of the toggle switch, and a limit slot is provided on the limit block. One end of the driving rocker arm is located on one side of the limit ring, and the other end is clamped in the limit slot for limiting. A sliding plate is provided on the fixed seat below the driving rocker arm, and a card hole is provided on the sliding plate to cooperate with the card buckle, and a third elastic member for resetting the sliding plate is provided on the sliding plate. A transmission lever is rotatably assembled on the fixed seat between the sliding plate and the limit block through the third rotating shaft, and the two ends of the transmission lever are respectively arranged corresponding to the limit block and the sliding plate.

[0006] In particular, the first rotating shaft is equipped with a fourth elastic member for automatically opening the medicine storage chamber.

[0007] In particular, the medicine storage bin is provided with a clamping head adapted to the toggle switch.

[0008] In particular, an injection needle is detachably mounted on the front end of the medicine storage bin, and a pressure block is mounted on the bottom of one end of the medicine storage bin where the injection needle is mounted so as to slide back and forth in the horizontal direction. An elongated hole is provided on the pressure block, and a guide pin is provided in the elongated hole. When the injection needle is mounted on the medicine storage bin, one end of the pressure block is pressed and limited by the injection needle, and the other end is limited by the end of the fixing seat.

[0009] In particular, the pressing block is an L-shaped structure as a whole, including horizontal and vertical edges. The end of the medicine storage bin is provided with a notch for assembling the pressing block, the bottom of the notch extends downward with a hinged seat, and the guide pin is provided on the hinged seat.

[0010] Particularly, the elongated hole is opened on the horizontal edge, the vertical edge is located in the notch, and when the injection needle is assembled on the medicine storage bin, the outer side of the vertical edge is flush with the end surface of the bin body.

[0011] The beneficial effects of the present invention are that, compared with the prior art, the medicine storage chamber safety device of the fully automatic insulin injection pen not only has a simple structure and is convenient and quick to change medicines; the medicine storage chamber can only be opened after the injection needle is removed and the drive rod is fully retracted into place, thereby avoiding user misoperation and improving the safety and reliability of the fully automatic injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an exploded view of a drug storage compartment safety device of a fully automatic insulin injection pen provided by a specific embodiment of the present invention;

[0013] Figure 2 This is an assembly diagram of a drug storage compartment safety device for a fully automatic insulin injection pen provided by a specific embodiment of the present invention;

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of a pressing block of a drug storage chamber safety device of a fully automatic insulin injection pen provided by a specific embodiment of the present invention. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0016] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosure of the present invention. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be a central component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there can also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0017] See also Figures 1 to 3As shown, in this embodiment, a drug storage chamber safety device for a fully automatic insulin injection pen is provided. The drug storage chamber adopts a side flip-up medicine loading structure design, including a fixed seat 1, a drug storage chamber 2, a driving rod 3 and an injection needle 4. One end of the drug storage chamber 2 is rotatably mounted on the fixed seat 1 through a first rotating shaft 5. The first rotating shaft 5 is equipped with a torsion spring 6a for automatically opening the drug storage chamber 2 to provide elastic force. The medicine bottle 7 is placed in the drug storage chamber 2. The driving rod 3 is movably mounted in the driving sleeve 8 and is located at the opening and closing end of the drug storage chamber 2. The end of the driving sleeve 8 is telescopically equipped with a limiting ring 9. A coil spring 10 is provided between the limiting ring 9 and the driving sleeve 8 for pushing the limiting ring 9 to move toward the drug storage chamber 2. The driving rod 3 is arranged through the limiting ring 9 and the radius of its head is larger than the inner hole of the limiting ring 9. A driving rocker arm 12 is rotatably provided on the fixed seat 1 through a second rotating shaft 11. A torsion spring 6b is installed to reset the driving rocker arm 12. A toggle switch 13 for opening and closing the medicine storage bin 2 is provided on the fixed seat 1. A limit block 14 is provided at the bottom of the toggle switch 13. A limit slot 15 is provided on the limit block 14. One end of the driving rocker arm 12 is located on one side of the limit ring 9, and the other end is clamped in the limit slot 15 for limiting. A sliding plate 16 is provided on the fixed seat 1 under the driving rocker arm 12. A card hole 17 is provided on the sliding plate 16 to cooperate with the card hole 17. A hook 18 is provided at the bottom of one end of the medicine storage bin 2 to cooperate with the card hole 17. A torsion spring 6c is provided on the sliding plate 16 to reset the sliding plate 16. A transmission lever 20 is rotatably assembled between the sliding plate 16 and the limit block 14 on the fixed seat 1 through a third rotating shaft 19. The two ends of the transmission lever 20 are respectively arranged corresponding to the limit block 14 and the sliding plate 16. A card head 21 adapted to the toggle switch 13 is provided on the medicine storage bin 2.

[0018] The drug storage chamber 2 includes a cylindrical chamber body, the end of which is provided with an externally threaded section having a radius smaller than that of the chamber body. The injection needle 4 is detachably mounted on the externally threaded section via internal threads. A pressure block 22 is mounted at the bottom of one end of the chamber body, where the injection needle 4 is mounted, so that it can slide back and forth horizontally. The pressure block 22 is generally L-shaped, including a horizontal side 23 and a vertical side 24. The horizontal side 23 has extension blocks 25 extending to both sides. The horizontal side 23 is provided with an elongated hole 26. The end of the chamber body is provided with a notch for accommodating the vertical side 24. A hinge seat 27 extends downward from the bottom of the notch. The two ends of a guide pin 28 are mounted on the hinge seat 27 and are arranged through the elongated hole 26 to assemble the pressure block 22 on the hinge seat 27.

[0019] When the drug storage chamber 2 of the fully automatic injector is closed, the coil spring 10 pushes the retaining ring 9 outward, pressing it against the drug storage chamber 2. Simultaneously, the hook 18 at the bottom of the drug storage chamber 2 engages the retaining hole 17, securing the drug storage chamber 2 in place. The retaining head 21 at the top inserts into the toggle switch 13, securing the drug storage chamber 2 in place. To open the drug storage chamber 2 for a medication change, the needle 3 must first be completely removed. The mechanism operates as follows: when the tail end of the needle 4 is screwed onto the externally threaded section, the vertical edge 24 of the pressure block 22 is restrained within the notch by the tail end of the needle 4, while the end of the horizontal edge 23 abuts against the end of the mounting base 1, securing the drug storage chamber 2. Only when the needle 4 is completely removed, free from the outer edges of the vertical edge 24, can the drug storage chamber 2 be opened outward. During the opening process, the entire pressure block 22 moves outward through the elongated hole 26 to avoid interference. When the driving rod 3 is fully retracted, the limiting ring 9 will move toward the end of the driving rocker arm 12, and the limiting ring 9 will be pressed against one end of the driving rocker arm 12, thereby driving the driving rocker arm 12 to rotate, thereby driving the other end to rotate out of the limiting groove 15, and the toggle switch 13 loses its limit. Then, the toggle switch 13 is operated to push one end of the transmission lever 20 to rotate, and then the sliding plate 16 is pushed toward the direction close to the injection needle 4 through the other end of the transmission lever 20, and finally the hook 18 is disengaged from the card hole 17. At this time, the medicine storage bin 2 completely loses its limit and automatically pops out to the outside under the action of the torsion spring 6a.

[0020] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A drug storage bin safety device for a fully automatic insulin injection pen, comprising a fixed seat, a drug storage bin and a driving rod, wherein a toggle switch is arranged on the fixed seat, one end of the drug storage bin is rotatably mounted on the fixed seat through a first rotating shaft, and a buckle is arranged at the bottom of the other end, and the driving rod is movably mounted in a driving sleeve, characterized in that: The end of the driving sleeve can be telescopically equipped with a limit ring, and a first elastic member for pushing the limit ring to move toward the medicine storage bin is arranged between the limit ring and the driving sleeve, the driving rod is passed through the limit ring and its head radius is larger than the inner hole of the limit ring, a driving rocker arm is rotatably arranged on the fixed seat through a second rotating shaft, and a second elastic member for resetting the driving rocker arm is installed on the second rotating shaft, a limit block is arranged at the bottom of the toggle switch, a limit groove is arranged on the limit block, one end of the driving rocker arm is located on one side of the limit ring, and the other end is clamped in the limit groove for limiting, a sliding plate is arranged on the fixed seat below the driving rocker arm, a clamping hole is arranged on the sliding plate to cooperate with the buckle, and a third elastic member for resetting the sliding plate is arranged on the sliding plate, and a transmission lever is rotatably arranged on the fixed seat between the sliding plate and the limit block through a third rotating shaft, and the two ends of the transmission lever are respectively arranged corresponding to the limit block and the sliding plate; The first elastic member is a coil spring. During the return process of the driving rod, the limiting ring can drive the limiting ring to overcome the elastic force of the coil spring and move toward the direction close to the end of the driving rocker arm. When the driving rod is fully retracted, the limiting ring can abut against one end of the driving rocker arm, driving the driving rocker arm to rotate, thereby driving the other end to rotate out of the limiting groove, causing the toggle switch to lose its limit.

2. The drug storage chamber safety device of the fully automatic insulin injection pen according to claim 1 is characterized in that: The first rotating shaft is equipped with a fourth elastic member for automatically opening the medicine storage bin.

3. The drug storage chamber safety device of the fully automatic insulin injection pen according to claim 1 is characterized in that: The medicine storage bin is provided with a clamping head adapted to the toggle switch.

4. The drug storage chamber safety device of the fully automatic insulin injection pen according to any one of claims 1 to 3, characterized in that: An injection needle is detachably mounted on the front end of the medicine storage bin, and a pressure block is slidably mounted on the bottom of one end of the medicine storage bin where the injection needle is mounted so as to slide back and forth in a horizontal direction. An elongated hole is arranged on the pressure block, and a guide pin is arranged in the elongated hole. When the injection needle is mounted on the medicine storage bin, one end of the pressure block is pressed and limited by the injection needle, and the other end is pressed against the end of the fixing seat for limiting.

5. The drug storage chamber safety device of the fully automatic insulin injection pen according to claim 4, characterized in that: The pressing block is in an "L"-shaped structure as a whole, including a horizontal side and a vertical side. A notch for assembling the pressing block is provided at the end of the medicine storage bin, and a hinge seat is extended downward from the bottom of the notch, and the guide pin is provided on the hinge seat.

6. The drug storage chamber safety device of the fully automatic insulin injection pen according to claim 5, characterized in that: The long strip hole is opened on the horizontal edge, the vertical edge is located in the notch, and when the injection needle is assembled on the medicine storage bin, the outer side of the vertical edge is flush with the end surface of the bin body.

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