A needle tube connecting mechanism, an insulin pump infusion module and a medical device

Abstract

The utility model relates to medical instrument technical field discloses a needle tube connecting mechanism, insulin pump infusion module and medical instrument. Wherein needle tube connecting mechanism includes needle tube and adapter block, and the adapter block is provided with the flow groove and is connected in the liquid inlet channel and the liquid outlet hole of flow groove, and the adapter block is used for connecting infusion device, and the flow groove and infusion device form the flow chamber between, one end of needle tube is arranged in the liquid outlet hole, and the convex length of needle tube relative to the end face of liquid outlet hole near the one end of flow groove is 0.2mm plus or minus 0.02mm, and needle tube is bonded in the liquid outlet hole through glue. Realized the sealed connection between needle tube and liquid outlet hole, because the convex setting of needle tube relative to the end face of liquid outlet hole near the one end of flow groove, makes the glue unable to climb to the end of needle tube, and then improves the problem of needle tube blockage, reduces the insulin infusion interruption risk caused by needle head blockage, improves the drug safety of diabetic patients, and the decrease of blockage rate can also reduce the rework cost.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a needle tube connection mechanism, an insulin pump infusion module, and a medical device. Background Technology

[0002] As a crucial device in diabetes treatment, the performance of the insulin pump's infusion module directly impacts patient medication safety and treatment efficacy. Within the insulin pump infusion module, the mating structure between the needle and the plastic components is considered the "critical channel" for insulin infusion. The mating clearance and needle installation depth of this structure play a decisive role in the effectiveness of the adhesive sealing.

[0003] Currently, during the assembly process of the needle and the plastic part, the plastic part has a liquid outlet hole into which the needle needs to be inserted, followed by glue application at the gap between the two. However, during glue application, the glue can climb upwards along the gap due to capillary action, eventually covering the needle tip and causing blockage of the infusion channel. The blockage rate is as high as 8%-10%. This high blockage rate not only significantly increases the product rework rate, production costs, and production cycle, but more seriously, it poses a huge safety hazard to patients, causing medication interruption, affecting the normal treatment process, and even potentially endangering the patient's life and health.

[0004] Therefore, there is an urgent need for a needle connection mechanism, an insulin pump infusion module, and a medical device to solve the aforementioned problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a needle tube connection mechanism that achieves a sealed connection between the needle tube and the liquid outlet. Because the end face of the needle tube protrudes from the end of the liquid outlet near the flow channel, the glue cannot climb to the end of the needle tube, thereby improving the problem of needle tube blockage, reducing the risk of insulin infusion interruption caused by needle head blockage, improving the medication safety of diabetic patients, and reducing the blockage rate can also reduce rework costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, a needle connection mechanism is provided, comprising a needle and an adapter block. The adapter block is provided with a flow groove and an inlet channel and an outlet hole connected to the flow groove. The adapter block is used to connect an infusion device. The flow groove and the infusion device form a flow chamber. One end of the needle passes through the outlet hole, and the protrusion length of the end face of the needle near the flow groove relative to the outlet hole is 0.2mm ± 0.02mm. The needle is glued to the outlet hole.

[0008] As a preferred technical solution for a needle connection mechanism, the difference between the inner diameter of the liquid outlet and the outer diameter of the needle is 0.05mm ± 0.005mm.

[0009] As a preferred technical solution for a needle tube connection mechanism, the liquid outlet includes a guide portion and a connecting portion. The guide portion is located at the end of the connecting portion away from the flow groove, and the inner diameter of the guide portion gradually increases in the direction away from the flow groove.

[0010] As a preferred technical solution for a needle connection mechanism, the connection between the guide portion and the connecting portion is achieved through a circular arc transition.

[0011] As a preferred technical solution for a needle connection mechanism, the liquid outlet is stepped, and the liquid outlet includes a large-diameter section and a small-diameter section, with the large-diameter section located at the end of the small-diameter section away from the flow channel.

[0012] As a preferred technical solution for a needle connection mechanism, the adapter block is further provided with a first inlet hole extending in a first direction and a second inlet hole extending in a second direction. One end of the first inlet hole is connected to the infusion device, and the other end is provided with a sealing element. One end of the second inlet hole is connected to the flow groove, and the other end is connected to the inner wall of the first inlet hole. The first inlet hole and the second inlet hole are connected to form the inlet channel.

[0013] As a preferred technical solution for a needle connection mechanism, the sealing element is a silicone sealing gasket.

[0014] As a preferred technical solution for a needle connection mechanism, the adapter block is a plastic part.

[0015] In a second aspect, an insulin pump infusion module is provided, comprising an insulin pump and a needle connection mechanism as described in any of the above, wherein the adapter block is connected to the insulin pump.

[0016] On the other hand, a medical device is provided, including the needle connection mechanism described in any of the above embodiments.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention provides a needle connection mechanism, an insulin pump infusion module, and a medical device. During the assembly of the needle and adapter block, one end of the needle passes through the outlet port, with the protrusion length of the end face of the needle relative to the outlet port near the flow channel being 0.2mm ± 0.02mm. Then, adhesive is applied between the needle and the outlet port. During adhesive application, the adhesive is filled from the end of the outlet port away from the flow channel. Due to capillary action, the adhesive fills the gap between the needle and the outlet port, achieving a sealed connection. Because the end face of the needle relative to the outlet port near the flow channel protrudes, the adhesive cannot rise to the end of the needle, thus improving the problem of needle blockage, reducing the risk of insulin infusion interruption due to needle tip blockage, improving medication safety for diabetic patients, and reducing rework costs. During operation, the infusion device delivers the medication to the patient sequentially through the inlet channel, the flow chamber, and the needle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the needle connection mechanism provided in a specific embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the needle connection mechanism provided in a specific embodiment of this utility model;

[0022] Figure 3 This is an exploded view of the needle connection mechanism provided in a specific embodiment of this utility model.

[0023] The markings in the image are as follows:

[0024] 1. Syringe;

[0025] 2. Adapter block; 21. Liquid inlet channel; 211. First liquid inlet hole; 212. Second liquid inlet hole; 22. Liquid outlet hole; 221. Guide part; 222. Connecting part; 23. Flow groove;

[0026] 3. Adhesive; 4. Seals. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] Currently, during the assembly process of the needle and the plastic part, the plastic part has a liquid outlet hole into which the needle needs to be inserted, followed by glue application at the gap between the two. However, during glue application, the glue can climb upwards along the gap due to capillary action, eventually covering the needle tip and causing blockage of the infusion channel. The blockage rate is as high as 8%-10%. This high blockage rate not only significantly increases the product rework rate, production costs, and production cycle, but more seriously, it poses a huge safety hazard to patients, causing medication interruption, affecting the normal treatment process, and even potentially endangering the patient's life and health.

[0032] To solve the above problems, such as Figures 1-3As shown, this embodiment provides a needle tube connection mechanism, which includes a needle tube 1 and an adapter block 2. The adapter block 2 is provided with a flow groove 23 and an inlet channel 21 and an outlet hole 22 connected to the flow groove 23. The adapter block 2 is used to connect an infusion device. The flow groove 23 and the infusion device form a flow chamber. One end of the needle tube 1 passes through the outlet hole 22, and the protrusion length of the end face of the needle tube 1 relative to the outlet hole 22 near the flow groove 23 is 0.2mm ± 0.02mm. The needle tube 1 is bonded to the outlet hole 22 with glue 3. During the assembly of needle 1 and adapter block 2, one end of needle 1 passes through the outlet hole 22, and the protrusion length of the end face of needle 1 relative to the outlet hole 22 near the flow channel 23 is 0.2mm ± 0.02mm. Then, adhesive is applied between needle 1 and outlet hole 22. During adhesive application, adhesive 3 is filled from the end of outlet hole 22 away from flow channel 23. Due to capillary action, adhesive 3 fills the gap between needle 1 and outlet hole 22, achieving a sealed connection between needle 1 and outlet hole 22. Because the end face of needle 1 relative to the outlet hole 22 near flow channel 23 protrudes, adhesive 3 cannot climb to the end of needle 1, thereby improving the problem of needle 1 blockage, reducing the risk of insulin infusion interruption due to needle tip blockage, improving medication safety for diabetic patients, and reducing rework costs. During operation, the infusion device delivers the medication to the patient sequentially through inlet channel 21, flow chamber, and needle 1. In this embodiment, the protrusion length of the end face of the needle tube 1 relative to the liquid outlet 22 near the flow channel 23 is 0.2mm.

[0033] Preferably, the difference between the inner diameter of the dispensing hole 22 and the outer diameter of the needle tube 1 is 0.05mm ± 0.005mm. The dispensing hole 22 and the needle tube 1 are fitted with a clearance fit. The clearance between the dispensing hole 22 and the needle tube 1 should not be too large, as this can easily lead to poor sealing between the dispensing hole 22 and the needle tube 1; the clearance between the dispensing hole 22 and the needle tube 1 should not be too small, as this can easily prevent the glue 3 from climbing and result in low connection strength between the dispensing hole 22 and the needle tube 1. In this embodiment, the difference between the inner diameter of the dispensing hole 22 and the outer diameter of the needle tube 1 is 0.05mm, which ensures both the sealing performance between the dispensing hole 22 and the needle tube 1 and the connection strength between the dispensing hole 22 and the needle tube 1.

[0034] In this embodiment, the liquid outlet 22 includes a guide portion 221 and a connecting portion 222. The guide portion 221 is located at the end of the connecting portion 222 away from the flow groove 23. The inner diameter of the guide portion 221 gradually increases in the direction away from the flow groove 23. By providing the guide portion 221, on the one hand, when the needle tube 1 passes through the guide portion 221 and the connecting portion 222 in sequence, the guide portion 221 can provide guidance for the needle tube 1, facilitating the insertion of the needle tube 1 and improving assembly convenience; on the other hand, during dispensing, it facilitates the flow of glue 3 into the gap between the needle tube 1 and the liquid outlet 22. In this embodiment, the difference between the inner diameter of the connecting portion 222 and the outer diameter of the needle tube 1 is 0.05 mm.

[0035] More preferably, the connection between the guide portion 221 and the connecting portion 222 is transitioned by an arc, which facilitates the insertion of the needle tube 1 into the connecting portion 222.

[0036] In other embodiments, the liquid outlet 22 is stepped, comprising a large-diameter section and a small-diameter section. The large-diameter section is located at the end of the small-diameter section away from the flow groove 23, facilitating the flow of adhesive 3 into the gap between the needle tube 1 and the liquid outlet 22, thus reducing the difficulty of dispensing. The difference between the inner diameter of the small-diameter section and the outer diameter of the needle tube 1 is 0.05 mm.

[0037] Furthermore, the adapter block 2 is also provided with a first inlet hole 211 extending along a first direction and a second inlet hole 212 extending along a second direction. One end of the first inlet hole 211 is connected to the infusion device, and the other end is provided with a sealing element 4. One end of the second inlet hole 212 is connected to the flow channel 23, and the other end is connected to the inner wall of the first inlet hole 211. The first inlet hole 211 and the second inlet hole 212 are connected to form an inlet channel 21. When the adapter block 2 is assembled with the infusion device, the infusion device and the flow channel 23 form a flow chamber. The infusion device can provide the drug solution to the patient sequentially through the first inlet hole 211, the second inlet hole 212, the flow chamber, and the needle tube 1. In this embodiment, the outlet hole 22 extends along a third direction. The first direction is Z, the second direction is Y, and the third direction is X. The first direction, the second direction, and the third direction are perpendicular to each other.

[0038] In this embodiment, the sealing element 4 is a silicone sealing gasket. The silicone sealing gasket is sealed to the adapter block 2. When it is necessary to fill the infusion device with medication, a needle can be inserted through the silicone sealing gasket and the medication can be filled into the infusion device. Then the needle is withdrawn, the silicone sealing gasket automatically seals, and the infusion device delivers the medication to the patient through the adapter block 2 and the needle tube 1.

[0039] This embodiment also provides an insulin pump infusion module, including an insulin pump and the aforementioned needle connection mechanism. The infusion device is an insulin pump, and the adapter block 2 is connected to the insulin pump. By adopting the aforementioned needle connection mechanism, the production yield of the insulin pump infusion module is improved, and the safety of use is enhanced.

[0040] This embodiment also provides a medical device including the above-mentioned needle connection mechanism. By adopting the above-mentioned needle connection mechanism, the production yield of the medical device is improved and the safety of the medical device is enhanced.

[0041] Note that the above description is merely a preferred embodiment 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 various obvious changes, readjustments, and substitutions can be made 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 needle tube connection mechanism, characterized in that, The device includes a needle (1) and an adapter block (2). The adapter block (2) is provided with a flow channel (23) and an inlet channel (21) and an outlet hole (22) connected to the flow channel (23). The adapter block (2) is used to connect the infusion device. The flow channel (23) and the infusion device form a flow chamber. One end of the needle (1) passes through the outlet hole (22), and the protrusion length of the end face of the needle (1) near the flow channel (23) relative to the outlet hole (22) is 0.2mm ± 0.02mm. The needle (1) is glued to the outlet hole (22) with glue (3).

2. The needle tube connecting mechanism according to claim 1, characterized in that, The difference between the inner diameter of the liquid outlet (22) and the outer diameter of the needle tube (1) is 0.05mm ± 0.005mm.

3. The needle tube connecting mechanism according to claim 1, characterized in that, The liquid outlet (22) includes a guide portion (221) and a connecting portion (222). The guide portion (221) is located at one end of the connecting portion (222) away from the flow groove (23). The inner diameter of the guide portion (221) gradually increases in the direction away from the flow groove (23).

4. The needle tube connecting mechanism according to claim 3, characterized in that, The connection between the guide part (221) and the connecting part (222) is transitioned by an arc.

5. The needle tube connecting mechanism according to claim 1, characterized in that, The liquid outlet (22) is stepped, and the liquid outlet (22) includes a large diameter section and a small diameter section. The large diameter section is located at the end of the small diameter section away from the flow channel (23).

6. The needle tube connecting mechanism according to claim 1, characterized in that, The adapter block (2) is also provided with a first inlet hole (211) extending in a first direction and a second inlet hole (212) extending in a second direction. One end of the first inlet hole (211) is connected to the infusion device, and the other end is provided with a sealing element (4). One end of the second inlet hole (212) is connected to the flow groove (23), and the other end is connected to the inner wall of the first inlet hole (211). The first inlet hole (211) and the second inlet hole (212) are connected to form the inlet channel (21).

7. The needle tube connecting mechanism according to claim 6, characterized in that, The sealing element (4) is a silicone sealing gasket.

8. The needle tube connecting mechanism according to claim 1, characterized in that, The adapter block (2) is a plastic part.

9. An insulin pump infusion module, characterized in that, Includes an insulin pump and a needle connection mechanism as described in any one of claims 1-8, wherein the adapter block (2) is connected to the insulin pump.

10. A medical device, characterized in that, Includes the needle connection mechanism as described in any one of claims 1-8.

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