Closed drug delivery device

Abstract

The invention provides a closed drug delivery device. The closed drug delivery device comprises a cylindrical body, an elastic body, a hollow connecting piece and a needle tube. The cylindrical body has a first end and a second end opposite to each other. The elastic body is arranged in the cylindrical body and is exposed out of the cylindrical body from the first end. The hollow connecting piece is freely pivoted in the cylindrical body and is coaxial with the cylindrical body. The hollow connecting piece is exposed out of the cylindrical body from the second end. The hollow connecting piece abuts against the elastic body. The needle tube is assembled and communicated with the hollow connecting piece and located in the elastic body. The elastic body is suitable for being deformed by external force from the exposed position of the first end, so that the needle tube punctures the elastic body.

Description

Technical Field

[0001] The present invention relates to a drug delivery device, in particular to a closed drug delivery device. Background Art

[0002] Traditionally, drugs are taken out of containers and filled into syringes by manually operating the needle tube of syringes (or injectors) before injection. However, in the above drug delivery process, it is still impossible to completely avoid the concerns of drug leakage or contamination due to exposure to the external environment. In order to overcome the above problems, the prior art provides additional components to achieve the required sealing effect, but this will increase the manufacturing cost and increase the complexity of the user's operation, causing inconvenience.

[0003] Therefore, how to provide a simple and fast mechanism to facilitate the delivery of drugs in a close-circulation environment has become a problem that relevant technical personnel need to think about and solve. Summary of the invention

[0004] The present invention is directed to a closed drug delivery device, which provides a quick-connect function through a simple mechanism to meet the demand for drug delivery in a closed circulation environment.

[0005] According to an embodiment of the present invention, a closed drug delivery device includes a cylindrical body, an elastomer, a hollow connector and a needle tube. The cylindrical body has a first end and a second end opposite to each other. The elastomer is disposed in the cylindrical body and the cylindrical body is exposed from the first end. The hollow connector is freely pivoted in the cylindrical body and is coaxial with the cylindrical body. The hollow connector exposes the cylindrical body from the second end. The hollow connector abuts the elastomer. The needle tube is assembled and connected to the hollow connector and is located in the elastomer. The elastomer is suitable for being deformed by an external force at the exposed portion of the first end so that the needle tube punctures the elastomer.

[0006] Based on the above, the closed drug delivery device sets the elastomer and the hollow connector in the cylindrical body, and one end of the elastomer will expose the cylindrical body. One end of the needle tube is assembled and connected to the hollow connector, and the other end of the needle tube is accommodated in the elastomer. In this way, the user can press the elastomer to expose a part of the cylindrical body, so that the needle tube can puncture and protrude from the elastomer through the process of compressing the elastomer, thereby achieving the effect of quickly connecting with the docking piece. Accordingly, the closed drug delivery device can smoothly carry out drug delivery through its simple component composition and quick connection mechanism, so as to effectively reduce its manufacturing process and manufacturing cost, and at the same time effectively reduce the difficulty of user operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of a closed drug delivery device according to an embodiment of the present invention;

[0008] Figure 2 and Figure 3 Shown from different perspectives Figure 1 Schematic diagram of the decomposition of

[0009] Figure 4 and Figure 5 The exploded schematic diagrams of the drug delivery device are shown from different perspectives;

[0010] Figure 6 and Figure 7 sectional views showing the transmission device and related components respectively;

[0011] Figure 8 and Fig. 9 They are cross-sectional views of the hollow connector and the cylindrical body at different locations. DETAILED DESCRIPTION

[0012] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0013] Figure 1 It is a schematic diagram of a closed drug delivery device according to an embodiment of the present invention, and in particular, the closed drug delivery device is combined with related components during use. Figure 2 and Figure 3 Shown from different perspectives Figure 1 Please also refer to the exploded diagram of Figures 1 to 3 In this embodiment, a closed drug transmission device 100 (hereinafter referred to as transmission device 100) is used to quickly connect container 1 200 and container 2 300 to form a closed channel between the two to transmit drugs. Here, container 1 200 is, for example, a liquid drug bottle or a solid powder drug bottle, and container 2 300 is, for example, a syringe, so that the drug is transferred from container 1 200 to container 2 300 via the transmission device 100, thereby avoiding the risk of contamination caused by exposure of the drug to the outside during the transmission process.

[0014] Figure 4 and Figure 5 The exploded view of the drug delivery device is shown from different perspectives. Please also refer to Figure 4 and Figure 5 In this embodiment, the transmission device 100 includes a cylindrical body 110, an elastic body 120, a hollow connecting member 130, and a needle tube 140. The cylindrical body 110 has a first end E1 and a second end E2 opposite to each other. The elastic body 120 is disposed in the cylindrical body 110 and exposes the cylindrical body 110 (such as Figure 2As shown). Here, the elastomer 120 is filled in the cylindrical body 110, and is located in the space defined by the hollow connector 130 to the first end E1. The elastomer 120 has a top surface S1 and a bottom surface S2 that are arranged along the center axis CX and opposite to each other. The hollow connector 130 abuts the bottom surface S2. The needle tube 140 is assembled and connected to the hollow connector 130, and extends from the hollow connector 130 through the bottom surface S2 into the internal space 121 of the elastomer 120. The top surface S1 exposes the cylindrical body 110 from the first end E1 to facilitate resistance to external forces, which will be further explained later. The hollow connector 130 is freely pivoted in the cylindrical body 110 and is coaxial with the cylindrical body 110 (coaxial with the center axis CX). The hollow connector 130 exposes the cylindrical body 110 from the second end E2 (as shown Figure 3 shown).

[0015] Figure 6 and Figure 7 The sectional views of the transmission device and related components are shown respectively, wherein Figure 6 Shows the decomposition state, Figure 7 Shows the combined state. Please refer to Figures 4 to 6 In this embodiment, the hollow connector 130 has a disc-shaped portion 131 and a stud 132. The stud 132 extends from the disc-shaped portion 131 and is coaxially arranged with each other (coaxial with the center axis CX). The disc-shaped portion 131 is freely pivotally coupled to the inner wall 111 of the cylindrical body 110. The needle tube 140 is substantially assembled on the disc-shaped portion 131 and faces away from the stud 132. The disc-shaped portion 131 also abuts against the bottom surface S2 of the elastic body 120. Figure 6 As shown, the cylindrical body 110 of this embodiment can be divided into section 1 C1, section 2 C2 and section 3 C3, wherein the first end E1 is located in section 1 C1, the second end E2 is located in section end 3 C3, and section 2 C2 is connected between section 1 C1 and section 3 C3. In other words, this embodiment is equivalent to distinguishing the cylindrical body 110 based on the adaptation relationship between the cylindrical body 110, the elastic body 120 and the hollow connecting piece 130, the section 3 C3 is extended from the second end E2, the hollow connecting piece 130 is located in section 3 C3, the section 1 C1 extends from the first end E1, the cylindrical body 110 also has an external thread 112, which is located on the outer surface of the cylindrical body 110 in section 1 C1, and the elastic body 120 is a cylinder with multiple steps of different outer diameters and is located in section 1 C1 and section 2 C2. In other embodiments not shown, the elastic body can also have different shapes according to needs.

[0016] Next, please refer to Figure 2 , Figure 3 and Figure 6As mentioned above, the two opposite ends of the transmission device 100 are connected to the container 1 200 and the container 2 300 respectively, so as to facilitate the transmission of the medicine. In this embodiment, the transmission device 100 is locked to the container 2 300 by the second end E2 of the cylindrical body 110 and the hollow connecting member 130, and docked with the container 1 200 by the first end E1, which are described separately below.

[0017] For the container 200 docked with the transmission device 100, the container 200 includes a cover 210 and a seal 220. The cover 210 has an outer cylinder 212 and an inner cylinder 213 that are coaxial (coaxial with the center axis CX) and maintain a gap G1. Both extend from the base 211 of the cover 210, wherein the outer cylinder 212 has an internal thread 212a, and the seal 220 is disposed in the inner cylinder 213. During the process of assembling the container 200 at the first end E1, the external thread 112 of the cylindrical body 110 is screwed to the internal thread 212a of the container 200, so that the section C1 of the cylindrical body 110 having the external thread 112 is inserted into the gap G1, providing the locking force required when the transmission device 100 and the container 200 are combined.

[0018] More importantly, please also refer to Figure 6 and Figure 7 In the above-mentioned assembly process, the inner tube 213 will abut against the part of the elastic body 120 that exposes the first end E1 (that is, the top surface S1), so that the inner tube 213 pushes against the top surface S1 to press and deform the elastic body 120, that is, the elastic body 120 is deformed from the top surface S1 along the central axis CX toward the bottom surface S2, until the needle tube 140 pierces the top surface S1 and the sealing member 220 in sequence and is inserted into the container 1 200. In other words, when the drug delivery is completed and the user removes the container 1 200 from the delivery device 100, the deformed elastic body 120 is restored to its original shape by elastic force to cover the needle tube 140 again and is roughly restored to its original shape. Figure 6 shown.

[0019] It is also worth mentioning that if Figure 3 As shown, the cylindrical body 110 also has a convex portion 113, which is arranged at the end of the external thread 112 and is located opposite to the first end E1. The outer cylindrical portion 212 of the cover body 210 also has a recess 212b, which is arranged at the end edge of the outer cylindrical portion 212 and is located opposite to the base 211. The convex portion 113 and the recess 212b are adapted to each other, so that the convex portion 113 is embedded in the recess 212b at the end of the threaded connection stroke of the container 1 200 assembled at the first end E1, thereby providing the user with a positioning feel. In another embodiment not shown, the recess can also be set on the cylindrical body 110, and the convex portion can be set on the cover body 210 of the container 1 200 to achieve the same effect as described above.

[0020] Please refer to Figure 2 , Figure 3and Figure 6 For the container 2 300 connected to the second end E2 of the tubular body 110, the container 2 300 includes a syringe 310 and an outer cylinder portion 320 and an inner cylinder portion 330 extending from the syringe 310, wherein the outer cylinder portion 320 has an internal thread 321 for docking with the stud 132 of the hollow connector 130, and allowing the inner cylinder portion 330 to penetrate into the interior of the stud 132 of the hollow connector 130 and communicate with the needle tube 140, so that the medicine in the aforementioned container 1 200 can be smoothly transmitted to the container 2 300 through the needle tube 140.

[0021] Figure 8 and Fig. 9 These are cross-sectional views of the hollow connector and the cylindrical body at different locations. Figure 4 , Figure 5 and Figure 8 In this embodiment, the cylindrical body 110 also has an inner tooth 115 protruding from the inner wall 111, and the disc-shaped portion 131 has a first stop recess R1 around it, and the inner tooth 115 and the first stop recess R1 are on each other's movement path. Therefore, during the aforementioned screw connection process between the container 2 300 and the hollow connector 130, since the hollow connector 130 is freely pivoted on the inner wall 111 of the cylindrical body 110, it will be driven by the container 2 300 and pivot with the container 2 300 in the cylindrical body 110 (that is, it will be driven by the friction force generated by the internal thread 321 of the container 2 300 being adapted to the stud 132). In this way, when the container 2 300 is screwed, the inner tooth 115 and the first stop recess R1 are on the same path as the first stop recess R1. Figure 8 When the first direction D1 is pivoted, the hollow connecting member 130 will also pivot along the first direction D1 with the container 300. Figure 8 As shown, at this time, the wedge-shaped profile between the first stop recess R1 and the inner teeth 115 will cause mutual interference, allowing the inner teeth 115 to stop the hollow connector 130, so that the hollow connector 130 is not driven to rotate relative to the cylindrical body 110 along the first direction D1, but the aforementioned threaded connection process between the second container 300 and the hollow connector 130 is still continued, so that the second container 300 can be smoothly locked with the hollow connector 130.

[0022] Furthermore, the hollow connector 130 also has a receiving recess R3 and an elastic arm 133 around the disc-shaped portion 131. The elastic arm 133 is suspended on the receiving recess R3 in a radial direction (relative to the central axis CX) of the disc-shaped portion 131 in an elastically deformable manner. When the disc-shaped portion 131 rotates along the second direction D2, the elastic arm 133 and the inner teeth 115 are on each other's action paths, and the first stop recess R1 is located on the elastic arm 133 and faces away from the receiving recess R3. Therefore, the elastic arm 133 is pressed by the inner teeth 115 and the receiving recess R3 is deformed and moves away from the action path of the inner teeth 115. The first direction D1 and the second direction D2 are opposite to each other. In other words, when the second container 300 pivots along the second direction D2, the hollow connector 130 can pivot synchronously with the second container 300 due to the above structural relationship.

[0023] Next, please refer to Figure 4 , Figure 5 and Fig. 9 , the disc-shaped portion 131 of this embodiment is also provided with a second stop recess R2 around it, which is located at a different position of the disc-shaped portion 131 from the aforementioned first stop recess R1. Furthermore, the cylindrical body 110 is also provided with an elastic hook 114, which is suspended between the inner wall 111 and the outer wall 116 of the cylindrical body 110 and exposed to the outer wall 116, that is, the cylindrical body 110 has a hollow portion to accommodate the elastic hook 114 therein, so that the elastic hook 114 can be elastically deformed along the radial direction of the disc-shaped portion 131. As mentioned above, when the second container 300 is pivoted along the second direction D2, since the hollow connector 130 is still driven to pivot synchronously, the second container 300 cannot be detached from the hollow connector 130. At this time, the user needs to apply pressure to the elastic hook 114, and from Fig. 9 It can be clearly seen that after the hollow connector 130 rotates for a certain distance, the compressed elastic hook 114 can smoothly fall into the second stop recess R2, and then the elastic hook 114 can interfere with the second stop recess R2 due to the wedge-shaped profile, thereby stopping the hollow connector 130 from continuing to rotate along the second direction D2, so that the container 2 300 can pivot along the second direction D2 and smoothly detach from the hollow connector 130.

[0024] It should also be mentioned that in order to allow the hollow connector 130 to have locking and unlocking functions along the first direction D1 and the second direction D2, the wedge-shaped profiles of the first stop recess R1 and the second stop recess R2 are substantially designed in opposite directions along the pivot path. In short, the hollow connector 130 is provided with an elastic arm 133, a first stop recess R1, a second stop recess R2 and a receiving recess R3 at the disc-shaped portion 131, so that the disc-shaped portion 131 is further provided with a ratchet mechanism, so that the locking and unlocking functions can be smoothly achieved.

[0025] In summary, in the above-mentioned embodiment of the present invention, the closed drug delivery device is used to quickly connect container one and container two to form a closed channel between the two to deliver drugs. The closed drug delivery device arranges the elastomer and the hollow connector in the cylindrical body, and one end of the elastomer exposes the cylindrical body. One end of the needle tube is assembled and connected to the hollow connector, and the other end of the needle tube is accommodated in the elastomer. In this way, the user can press the elastomer to expose a part of the cylindrical body, so that the needle tube can puncture and protrude from the elastomer through the process of compression of the elastomer, thereby achieving the effect of quickly connecting with the docking piece.

[0026] For the closed drug delivery device and container 1, container 1 can press and deform the elastic body during the docking process, so as to achieve the above-mentioned needle tube piercing the elastic body and further piercing the seal of container 1 to extend into and connect with container 1, so that the drug in container 1 can be smoothly transferred to the needle tube. For the closed drug delivery device and container 2, a ratchet mechanism is provided on the disc-shaped part of the hollow connecting piece, so that container 2 and the hollow connecting piece can be smoothly locked or unlocked, so that the drug can be transferred into container 2 through the needle tube when locked.

[0027] Accordingly, the closed drug delivery device can smoothly deliver drugs through its simple component composition and quick-connect mechanism, thereby effectively reducing its manufacturing process and manufacturing cost, and also effectively reducing the difficulty of user operation.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A closed drug delivery device, characterized in that: include: A cylindrical body having a first end and a second end opposite to each other; an elastic body, disposed in the cylindrical body and exposed from the first end; a hollow connecting piece, freely pivoted in the cylindrical body and coaxial with the cylindrical body, the hollow connecting piece exposing the cylindrical body from the second end, and the hollow connecting piece abutting against the elastic body; and A needle tube is assembled and connected to the hollow connector and is located in the elastic body. The elastic body is suitable for being deformed by external force at the exposed portion of the first end so that the needle tube can pierce the elastic body.

2. The closed drug delivery device according to claim 1, characterized in that: The elastic body is filled in the cylindrical body and is located in the space defined from the hollow connecting piece to the first end.

3. The closed drug delivery device according to claim 1, characterized in that: The elastic body has a top surface and a bottom surface arranged along the axial direction and opposite to each other, the hollow connector abuts against the bottom surface, the needle tube extends from the hollow connector through the bottom surface into the elastic body, and the top surface exposes the cylindrical body from the first end.

4. The closed drug delivery device according to claim 3, characterized in that: The external force is applied to the top surface to cause the elastic body to deform from the top surface along the axial direction toward the bottom surface until the needle tube pierces the top surface. When the external force is removed, the elastic body recovers from the deformation and covers the needle tube.

5. The closed drug delivery device according to claim 1, characterized in that: The cylindrical body has a section one extending from the first end and an external thread arranged on the section one, and the cylindrical body also has a protrusion or a recess located at the end of the external thread and relative to the first end, so that the protrusion or the recess provides a user with a positioning feel.

6. The closed drug delivery device according to claim 5, characterized in that: The cylindrical body also has section two and section three, the section two is connected between the section one and the section three, the section three extends from the second end, the hollow connecting piece is located in the section three, and the elastomer is located in the section one and the section two.

7. The closed drug delivery device according to claim 1, characterized in that: The hollow connector has a disc-shaped portion and a stud, the stud extends from the disc-shaped portion and is coaxially arranged with each other, the disc-shaped portion is pivotally coupled to the inner wall of the tubular body, the needle tube is assembled in the disc-shaped portion, and the elastic body abuts against the disc-shaped portion.

8. The closed drug delivery device according to claim 7, characterized in that: The cylindrical body has at least one internal tooth protruding from the inner wall, and the disc-shaped portion has at least one first stop recess around it. The internal tooth and the first stop recess are on each other's movement paths, so that the internal tooth stops the first stop recess, allowing the hollow connector to rotate in a first direction relative to the cylindrical body without being driven.

9. The closed drug delivery device according to claim 8, characterized in that: The disc-shaped portion is also provided with at least one accommodating recess and at least one elastic arm around it. The elastic arm is suspended on the accommodating recess in an elastically deformable manner along the radial direction of the disc-shaped portion. When the disc-shaped portion rotates along the second direction, the elastic arm and the inner teeth are on each other's movement paths, so that the elastic arm is pressed by the inner teeth and deformed toward the accommodating recess and moves away from the movement path of the inner teeth. The first direction and the second direction are opposite to each other.

10. The closed drug delivery device according to claim 1, characterized in that: It is used to form a closed channel between container one and container two to transport drugs. The container one is used to be assembled at the first end or removed from the first end, and the container two is used to be assembled at the second end or removed from the second end. During the process of assembling the container one at the first end, the container one provides the external force to extrude and deform the elastomer.

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