Insulin pen and needle automatic disengagement structure

Abstract

The utility model discloses an insulin pen and needle automatic separation structure, including pen body and needle head body, the needle head body plug -in connection is in the end of pen body, the side wall detachable sleeve of pen body is connected with fixed ring, the end of pen body sliding sleeve is equipped with the push ring of needle head body abutment, the side wall symmetrical fixed connection of push ring has two connecting plates, the side wall of fixed ring is connected with two fixed plates through two inserting rods. The utility model discloses reasonable structure design, is convenient for installing this structure on pen body or taking down from pen body, and further convenient for replacing or reusing, when the patient injects insulin and needs to discard needle head body, simultaneously presses two reset push blocks on two connecting plates, can make push ring push out needle head body from pen body and fall off, need not use hand contact needle head body, guarantees security.

Description

Technical Field

[0001] This utility model relates to the field of insulin pen technology, and in particular to a structure that automatically detaches the insulin pen from the needle. Background Technology

[0002] An insulin pen is an injection device that integrates insulin and a syringe. It is characterized by its portability, ease of operation, and accurate dosage, and is increasingly used by diabetic patients.

[0003] Insulin pen needles are disposable, requiring a new needle for each injection to prevent infection, dulling, or blockage. Currently, after administering insulin, the needle must be manually unscrewed and recapped, a process that carries the risk of hand injury and occupational exposure to infectious diseases. To address these issues, we have designed an insulin pen that automatically detaches from the needle. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing an automatic disengagement structure for insulin pens and needles. This structure facilitates the installation or removal of the pen body, making it easy to replace or reuse. When the patient needs to discard the needle body after injecting insulin, pressing the two reset push blocks on the two connecting plates simultaneously will cause the push ring to push the needle body off the pen body, eliminating the need to touch the needle body by hand and ensuring safety.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic needle disengagement structure for an insulin pen includes a pen body and a needle body. The needle body is pluggably connected to the end of the pen body. A retaining ring is detachably sleeved on the side wall of the pen body. A push ring that abuts against the needle body is slidably sleeved on the end of the pen body. Two connecting plates are symmetrically fixedly connected to the side wall of the push ring. The two retaining plates are connected to the side wall of the retaining ring through two insert rods. The two connecting plates slide on the outside of their respective retaining plates. The push ring pushes the needle body out of the pen body. The retaining plates and connecting plates are connected by a snap-fit ​​assembly to fix the connecting plates.

[0007] Preferably, the sidewall of the fixing ring has two symmetrically formed guide grooves, and two matching guide sliders are slidably connected in each of the two guide grooves. The sidewalls of the two guide sliders on the same side of the two guide grooves are fixedly connected to an arc-shaped fixing hoop. The inner sidewalls of the two arc-shaped fixing hoops are provided with rubber anti-slip pads that abut against the pen body, and the two arc-shaped fixing hoops are locked together by screws.

[0008] Preferably, the inner sidewall of the connecting plate is provided with a mounting groove, the fixing plate extends into the mounting groove and is slidably connected thereto, a plurality of first springs are connected between the fixing plate and the inner sidewall of the mounting groove, and the insertion rod slides through the connecting plate.

[0009] Preferably, the snap-fit ​​assembly includes a groove formed on the fixing plate, a snap-fit ​​block slidably connected in the groove, a plurality of second springs connected between the snap-fit ​​block and the inner sidewall of the groove, and a snap-fit ​​opening through the connecting plate that communicates with the mounting slide groove, the snap-fit ​​block slidably extending into the snap-fit ​​opening.

[0010] Preferably, a reset push block that abuts against the side wall of the locking block is slidably connected inside the bayonet.

[0011] Preferably, the inner sidewalls at both ends of the bayonet are provided with limiting grooves, and a limiting slider adapted to the limiting groove is slidably connected in the limiting groove. The limiting slider is fixedly connected to the sidewall of the reset push block.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. This insulin pen features an automatic needle detachment mechanism. By securely locking two arc-shaped retaining rings to the pen body, the stability of the retaining ring is ensured. This facilitates the installation or removal of the mechanism from the pen body, making it easy to replace and reuse.

[0014] 2. This insulin pen features an automatic needle detachment mechanism. When the patient needs to discard the needle after injecting insulin, they can simultaneously press the two reset push blocks on the two connecting plates to move the locking block into the fixing plate. The first spring will then push the connecting plate to move, and the push ring will push the needle body out of the pen body, allowing the needle to detach automatically without the need for manual contact with the needle body, ensuring safety. Furthermore, this process requires pressing both reset push blocks simultaneously, which reduces the occurrence of accidental contact. Attached Figure Description

[0015] Figure 1 This is a first-view three-dimensional structural diagram of an insulin pen and needle automatic disengagement structure proposed in this utility model.

[0016] Figure 2 This is a second-view three-dimensional structural diagram of an insulin pen and needle automatic disengagement structure proposed in this utility model.

[0017] Figure 3 This is a top-view planar structural diagram of an insulin pen and needle automatic disengagement structure proposed in this utility model.

[0018] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0019] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0020] In the diagram: 1. Pen body; 2. Needle body; 3. Limiting slider; 4. Fixing ring; 5. Push ring; 6. Connecting plate; 7. Insert rod; 8. First spring; 9. Guide groove; 10. Arc-shaped fixing hoop; 11. Mounting groove; 12. Fixing plate; 13. Bayonet; 14. Reset push block; 15. Snap-fit ​​block; 16. Second spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 An insulin pen with an automatic needle detachment structure includes a pen body 1 and a needle body 2. The pen body 1 is an insulin pen and can be used for a long time, requiring only the cartridge to be replaced. The internal structure and usage method of the pen body 1 are existing technologies and will not be described in detail here. The needle body 2 is pluggably connected to the end of the pen body 1. A retaining ring 4 is detachably fitted onto the side wall of the pen body 1. The inner diameter of the retaining ring 4 is not less than the outer diameter of the pen body 1, allowing the retaining ring 4 to fit onto the pen body 1. Two guide grooves 9 are symmetrically formed on the side wall of the retaining ring 4, and two compatible needles are slidably connected within each guide groove 9. The guide sliders are connected to the side walls of the two guide sliders on the same side of the two guide grooves 9 with arc-shaped fixing hoops 10. The guide sliders slide in the corresponding guide grooves 9, which can make the two arc-shaped fixing hoops 10 move closer or further away from each other. The inner side walls of the two arc-shaped fixing hoops 10 are provided with rubber anti-slip pads that abut against the pen body 1. The rubber anti-slip pads can increase the friction between the pen body 1 and the pen body 1, thereby making the fixing ring 4 stably fixed on the pen body 1. The two arc-shaped fixing hoops 10 are locked together by screws, which makes it easy to lock or loosen the two arc-shaped fixing hoops 10, thus making it easy to install and disassemble this structure.

[0023] The end of the pen body 1 is slidably fitted with a push ring 5 that abuts against the needle body 2. Two connecting plates 6 are symmetrically fixedly connected to the side wall of the push ring 5. Two fixing plates 12 are connected to the side wall of the fixing ring 4 through two insert rods 7. The two connecting plates 6 slide on the outside of the corresponding fixing plates 12. The inner side wall of the connecting plate 6 is provided with an installation groove 11. The fixing plate 12 extends into the installation groove 11 and slides therewith. Multiple first springs 8 are connected between the fixing plate 12 and the inner side wall of the installation groove 11. The insert rods 7 slide through the connecting plate 6 and connect the fixing plate 12 and the fixing ring 4 through the insert rods 7, so that the fixing plate 12 can be kept fixed together with the fixing ring 4. The fixing plate 12 extends into the installation groove 11, so that the connecting plate 6 can slide on the outside of the fixing plate 12. The first springs 8 are elastic springs that can push the connecting plate 6 to move away from the fixing ring 4, so that the needle body 2 can be pushed out of the pen body 1 through the push ring 5.

[0024] The fixing plate 12 and the connecting plate 6 are connected by a snap-fit ​​assembly to fix the connecting plate 6. The snap-fit ​​assembly includes a groove on the fixing plate 12, a snap-fit ​​block 15 slidably connected in the groove, and multiple second springs 16 connected between the snap-fit ​​block 15 and the inner wall of the groove. The connecting plate 6 has a through slot 13 that communicates with the mounting slide 11. The snap-fit ​​block 15 slides into the slot 13. The second springs 16 are elastic springs. When the snap-fit ​​block 15 is opposite to the slot 13, the second springs 16 can push the snap-fit ​​block 15 into the slot 13, fixing the connecting plate 6 to the outside of the fixing plate 12. A reset push block 14 is slidably connected to abut against the side wall of the snap-fit ​​block 15. Limiting grooves are provided on the inner side walls of both ends of the snap-fit ​​13. A limiting slider 3 adapted to the limiting groove is slidably connected in the limiting groove. The limiting slider 3 is fixedly connected to the side wall of the reset push block 14. The sliding of the limiting slider 3 in the limiting groove can guide and restrict the reset push block 14, so that the reset push block 14 will not be dislodged from the snap-fit ​​13. Moreover, the distance between the limiting slider 3 and the inner wall of the limiting groove on the other side is the same as the distance between the reset push block 14 and the outer side wall of the fixing plate 12, so that the reset push block 14 will not slide into the groove on the fixing plate 12.

[0025] The functional principle of this utility model can be explained through the following operation methods:

[0026] In this invention, when the insulin pen automatically detaches from the needle, the fixing ring 4 is sleeved on the pen body 1 from the end until the push ring 5 is sleeved at the dispensing port at the end of the pen body 1. The two arc-shaped fixing hoops 10 are pulled closer to each other and the two ends of the two arc-shaped fixing hoops 10 are fixed with screws, so that the two arc-shaped fixing hoops 10 are stably locked on the pen body 1. The rubber anti-slip pad on the inner side of the arc-shaped fixing hoop 10 can increase the friction between it and the pen body 1, ensuring the stability of the fixing ring 4. This makes it easy to install or remove the structure from the pen body 1, thus facilitating replacement and reuse.

[0027] In the initial state, the locking block 15 extends into the bayonet 13 to fix the connecting plate 6, the needle body 2 is sleeved on the end of the pen body 1, and the push ring 5 is located between the pen body 1 and the needle body 2, so that injection can be performed. When the patient needs to discard the needle body 2 after injecting insulin, the two reset push blocks 14 on the two connecting plates 6 are pressed at the same time, so that the reset push blocks 14 push the locking block 15 to move, so that the locking block 15 moves into the fixing plate 12. At this time, the first spring 8 can push the connecting plate 6 to move away from the fixing ring 4, and then the connecting plate 6 can drive the push ring 5 to move, pushing the needle body 2 out of the pen body 1. The needle automatically falls off without the need to touch the needle body 2 by hand, ensuring safety. Moreover, the setting of the two connecting plates 6 and the two reset push blocks 14 means that the two reset push blocks 14 need to be pressed at the same time to make the connecting plate 6 drive the push ring 5 to move, reducing the occurrence of accidental contact.

[0028] Push the connecting plate 6 to move it closer to the fixing ring 4. When the locking block 15 is opposite to the bayonet 13, the second spring 16 can push the locking block 15 into the bayonet 13 to fix the connecting plate 6, which will facilitate the next injection operation.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An insulin pen with automatic needle disengagement structure, comprising a pen body (1) and a needle body (2), characterized in that, The needle body (2) is plugged into and connected to the end of the pen body (1). The side wall of the pen body (1) is detachably fitted with a fixing ring (4). The end of the pen body (1) is slidably fitted with a push ring (5) that abuts against the needle body (2). The side wall of the push ring (5) is symmetrically fixedly connected with two connecting plates (6). The side wall of the fixing ring (4) is connected to two fixing plates (12) through two insert rods (7). The two connecting plates (6) slide on the outside of the corresponding fixing plates (12). The needle body (2) is pushed out of the pen body (1) through the push ring (5). The fixing plates (12) and the connecting plates (6) are connected by a snap-fit ​​assembly to fix the connecting plates (6).

2. The insulin pen and needle automatic disengagement structure according to claim 1, characterized in that, The sidewall of the fixed ring (4) has two symmetrical guide grooves (9). Two guide sliders that are adapted to each guide groove (9) are slidably connected in each guide groove (9). The sidewalls of the two guide sliders on the same side of the two guide grooves (9) are fixedly connected to an arc-shaped fixing hoop (10). The inner sidewalls of the two arc-shaped fixing hoops (10) are provided with rubber anti-slip pads that abut against the pen body (1). The two arc-shaped fixing hoops (10) are locked together by screws.

3. The insulin pen and needle automatic disengagement structure according to claim 1, characterized in that, The inner wall of the connecting plate (6) is provided with an installation groove (11), the fixing plate (12) extends into the installation groove (11) and is slidably connected thereto, a plurality of first springs (8) are connected between the fixing plate (12) and the inner wall of the installation groove (11), and the insert rod (7) slides through the connecting plate (6).

4. The insulin pen and needle automatic disengagement structure according to claim 1, characterized in that, The snap-fit ​​assembly includes a groove formed on the fixing plate (12), a snap-fit ​​block (15) is slidably connected in the groove, a plurality of second springs (16) are connected between the snap-fit ​​block (15) and the inner sidewall of the groove, and a snap-fit ​​opening (13) is formed through the connecting plate (6) and communicates with the mounting slide (11), and the snap-fit ​​block (15) slides into the snap-fit ​​opening (13).

5. The insulin pen and needle automatic disengagement structure according to claim 4, characterized in that, The bayonet (13) is slidably connected to a reset push block (14) that abuts against the side wall of the snap block (15).

6. The insulin pen and needle automatic disengagement structure according to claim 5, characterized in that, The inner walls at both ends of the bayonet (13) are provided with limiting grooves, and a limiting slider (3) adapted to it is slidably connected in the limiting groove. The limiting slider (3) is fixedly connected to the side wall of the reset push block (14).

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