A sealed structure of a puncture needle

Abstract

The utility model relates to medical equipment technical field especially, and it is a kind of sealing structure of puncture needle, the sealing structure includes needle tube and the hard rubber piece of setting in needle tube tail end, and hard rubber piece front end is provided with fixed block, and fixed block is provided with sealing ring, and sealing ring is attached with hard rubber piece, and fixed block, sealing ring and hard rubber piece are integral type structure.The application is by sealing ring and hard rubber piece and is provided with integral structure, and sealing ring is covered in the surface of fixed block, improves the firmness and stability of sealing ring combination, so that the air tightness is better, ensures sterilization effect.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a sealing structure for a puncture needle. Background Technology

[0002] A continuous glucose meter (CGM) is a device that continuously monitors the glucose concentration in subcutaneous interstitial fluid. It measures blood glucose levels using a tiny sensor, usually placed on the abdomen or upper arm, and wirelessly transmits the data to a receiver or smartphone app. It is particularly suitable for diabetic patients who need frequent blood glucose monitoring because it reduces the need for frequent finger pricks, thereby improving patient comfort and convenience.

[0003] Continuous glucose monitoring devices are classified as Class 3 medical products, which require airtight sterilization. If the airtightness of the product is poor, sterilization will not be complete.

[0004] When a sensor is implanted in the abdomen or upper arm, an implantation device is required, which involves puncturing the skin with a puncture needle. In the manufacturing process of the implantation device, the puncture needle is made through processes such as punching and bending. Then, hard plastic is injection molded onto the end of the metal puncture needle, and a soft plastic ring is then placed on top of the hard plastic (see...). Figure 1 This design makes the soft rubber ring and the hard rubber ring separate structures, which can easily lead to poor bonding after assembly, resulting in poor airtightness and affecting the sterilization effect. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing structure for a puncture needle. In view of the shortcomings of the existing technology, it aims to solve the technical problem that the existing puncture needle has a hard plastic injection molded at the tail end, which is covered with a soft plastic ring. After assembly, the connection is not reliable, resulting in poor airtightness and affecting the sterilization effect.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a sealing structure for a puncture needle, including a needle tube and a hard plastic component disposed at the tail end of the needle tube, a fixing block disposed at the front end of the hard plastic component, a sealing ring sleeved on the fixing block, the sealing ring fitting into the hard plastic component, and the fixing block, the sealing ring and the hard plastic component being an integral structure.

[0007] Furthermore, the surface of the sealing ring is connected to the surface of the hard rubber part.

[0008] Furthermore, the end of the fixing block that fits into the hard rubber part is provided with a groove, and the inner wall of the sealing ring is provided with a rib, which is embedded in the groove.

[0009] Furthermore, the needle tube is provided with a receiving groove, and the inner wall of the sealing ring is also provided with a protrusion. The protrusion is embedded in the receiving groove, and there is a notch between the protrusion and the protrusion.

[0010] Furthermore, the end of the syringe is provided with a connecting section that is fixedly connected to the rigid plastic part, and the connecting section has a planar structure.

[0011] Compared with the prior art, the beneficial effects of this application are as follows: This utility model includes a syringe and a rigid plastic component disposed at the tail end of the syringe. A fixing block is disposed at the front end of the rigid plastic component, and a sealing ring is sleeved on the fixing block. The sealing ring is attached to the rigid plastic component, and the fixing block, sealing ring, and rigid plastic component are an integral structure. By making the sealing ring and rigid plastic component an integral structure, and with the sealing ring covering the surface of the fixing block, this application improves the firmness and stability of the sealing ring connection, resulting in better airtightness and ensuring sterilization effect. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a puncture needle with a soft rubber ring in the prior art; Figure 2 This is a schematic diagram of the sealing structure of the puncture needle of this utility model; Figure 3 This is a schematic diagram of the structure of the puncture needle without the sealing ring in this utility model; Figure 4 This is a schematic diagram of the sealing ring structure in this utility model; Figure 5 This is a schematic diagram of the needle tube in this utility model.

[0014] The details of the reference numerals used in the above figures are as follows: 1-Needle, 11-Receiving groove, 12-Bent section, 13-Connecting section, 2-Hard rubber part, 3-Fixing block, 31-Groove, 4-Sealing ring, 41-Rib, 42-Protrusion, 43-Notch. Detailed Implementation

[0015] In the description of this application, the terms "connected" and "linked" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0016] In the description of this application, the technical terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, 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 the embodiments of this application.

[0017] In order to better understand the above-mentioned objectives, technical solutions and advantages of this application, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings, and to understand in detail how to solve the problems raised in the background art.

[0018] like Figures 2 to 4 As shown, a sealing structure for a puncture needle includes a needle tube 1 and a rigid plastic part 2 disposed at the tail end of the needle tube 1. A fixing block 3 is disposed at the front end of the rigid plastic part 2, and a sealing ring 4 is sleeved on the fixing block 3. The sealing ring 4 is in contact with the rigid plastic part 2, and the fixing block 3, the sealing ring 4 and the rigid plastic part 2 are an integral structure.

[0019] By using the above method, the sealing ring 4 and the rigid rubber part 2 are integrated into one structure. The sealing ring 4 covers the surface of the fixing block 3, which improves the firmness and stability of the sealing ring 4, resulting in better airtightness and ensuring sterilization effect.

[0020] In actual production, the needle tube 1 is made of stainless steel through processes such as cutting and bending. The hard plastic part 2 and the sealing ring 4 are both injection molded plastic parts. First, the hard plastic part 2 is injection molded onto the already processed metal needle tube 1 using in-mold injection molding, so that the front end of the hard plastic part 2 forms a fixing block 3. Then, the sealing ring 4 is also injection molded onto the fixing block 3 using the same in-mold injection molding process, so that the sealing ring 4 and the hard plastic part 2 form a whole, preventing the sealing ring 4 from shifting or falling off.

[0021] like Figure 2 As shown, in one specific embodiment of the improvement, the surface of the sealing ring 4 is connected to the surface of the hard plastic part 2. Specifically, the sealing ring 4 is made of soft plastic materials such as silicone or TPU. The sealing area of ​​the sealing ring 4 is increased along the length and width of the needle tube 1, thereby enhancing the sealing effect. Of course, in some embodiments, the surface of the sealing ring 4 can be set into an arc-shaped structure, so that the surface height of the sealing ring 4 is higher than the surface of the hard plastic part 2, and part of the surface of the sealing ring 4 protrudes, which can further enhance the airtightness in the connection of the hard plastic part 2.

[0022] like Figure 3 and Figure 4As shown, in one specific embodiment of the improvement, the fixing block 3 has a groove 31 at the tail end of the rigid rubber part 2, and the inner wall of the sealing ring 4 has a raised rib 41, which is embedded in the groove 31. Specifically, the sealing ring 4 has a through hole in its center, so that the fixing block 3 is in the through hole. When the sealing ring 4 is injection molded, the molten soft rubber is immersed in the groove 31, thereby forming the raised rib 41 along the inner wall of the through hole, which enhances the bonding effect of the sealing ring 4.

[0023] like Figure 3 and Figure 4 As shown, in one specific embodiment of the improvement, the needle tube 1 is provided with a receiving groove 11, and the inner wall of the sealing ring 4 is also provided with a protrusion 42. The protrusion 42 is embedded in the receiving groove 11, and a notch 43 is provided between the rib 41 and the protrusion 42. Specifically, the receiving groove 11 is used to place the sensor and implant it into the body. Since the rear section of the needle is covered by the hard plastic part 2, the combination of the needle tube 1 and the hard plastic part 2 is ensured. The portion of the receiving groove 11 corresponding to the fixing block 3 of the needle tube 1 is exposed. This portion of the receiving groove 11 is embedded in the notch, and the molten soft plastic of the sealing ring 4 during injection molding is immersed in the receiving groove 11 to form the protrusion 42, further enhancing the bonding effect of the sealing ring 4.

[0024] like Figure 5 As shown, in one specific embodiment of the improvement, the tail end of the needle tube 1 is provided with a connecting section 13 that is fixedly connected to the rigid plastic part 2. The connecting section 13 has a planar structure. Specifically, the needle tube 1 is provided with two vertically symmetrical and parallel bent sections 12 forming a receiving groove 11. The width of the connecting section 13 is greater than the total length between the two bent sections 23, and the end of the connecting section 13 near the bent section 12 is provided with an arc-shaped opening. In practical applications, when the rigid plastic part 2 wraps around the needle tube 1 for injection molding, the design of the vertical bent section 12 and the horizontal connecting section 13 can enhance the bonding effect between the needle tube 1 and the rigid plastic part 2.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A sealing structure for a puncture needle, comprising a needle tube and a rigid rubber component disposed at the tail end of the needle tube, wherein a fixing block is disposed at the front end of the rigid rubber component, characterized in that, The fixing block is fitted with a sealing ring, which is attached to the rigid rubber component. The fixing block, the sealing ring, and the rigid rubber component are an integral structure.

2. The sealing structure of a puncture needle according to claim 1, characterized in that, The surface of the sealing ring is connected to the surface of the rigid rubber component.

3. The sealing structure of a puncture needle according to claim 1, characterized in that, The fixing block has a groove at the tail end that fits against the hard rubber part, and the inner wall of the sealing ring has a rib that is embedded in the groove.

4. The sealing structure of a puncture needle according to claim 3, characterized in that, The needle tube is provided with a receiving groove, and the inner wall of the sealing ring is also provided with a protrusion. The protrusion is embedded in the receiving groove, and a notch is provided between the rib and the protrusion.

5. The sealing structure of a puncture needle according to claim 1, characterized in that, The needle tube has a connecting section at its tail end that is fixedly connected to the rigid plastic part. The connecting section has a planar structure.

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