A puncture needle

Abstract

The utility model relates to medical apparatus and instruments accessory technical field especially, it relates to a puncture needle, including the needle tube for containing sensor and setting up the needle seat of needle tube tail end, needle tube and needle seat are integral type structure, and needle tube includes two symmetrical side plates, and the front end of needle seat is provided with fixed unit, and the fixed unit top surface is provided with the accommodating groove containing needle tube, and the groove depth of accommodating groove is greater than the height of needle tube, and the upper portion of two inner side walls of accommodating groove is provided with the convex strip, and the convex strip is placed above the side plate and sticks together, and the middle of convex strip is provided with the gap, and the gap extends to the top surface of side plate downwardly. The application sets up accommodating groove through the front end fixed unit of needle seat, and the upper portion of two inner side walls of accommodating groove is provided with the convex strip, so that the convex strip compacts the side plate, and the middle of convex strip is provided with the gap, and the gap extends to the top surface of side plate downwardly, so that the fixed unit and the side plate cooperation form small step at the gap, reduce the junction area of fixed unit and needle tube inner wall, effectively reduce the risk of glue leakage into needle tube.

Description

Technical Field

[0001] This utility model relates to the field of medical device accessories technology, and in particular to a puncture needle. Background Technology

[0002] A CGM (Continuous Glucose Monitoring) system is a technology that monitors the glucose concentration in the interstitial fluid under the skin using a glucose sensor, thereby indirectly reflecting blood glucose levels. It mainly consists of three core components: a sensor, a transmitter, and a receiver.

[0003] In practical use, a puncture needle is required for both skin piercing and sensor placement. The tail end of the puncture needle is typically injection-molded into a single-piece needle hub. The puncture needle includes a grooved needle tube, the tail end of which is embedded in the needle hub; that is, the needle tube, except for the groove where the sensor is placed, is entirely enclosed by the needle hub (see [link]). Figure 1 However, during the production process, there is a risk that glue may leak onto the inner wall of the needle tube during the injection molding of the needle seat. This can cause fuzz to form during demolding, and when the sensor is assembled into the needle tube, it can easily adhere to the fuzz and be introduced into the human body, affecting the user's health. Utility Model Content

[0004] The purpose of this utility model is to provide a puncture needle that addresses the shortcomings of the existing technology by solving the technical problem that when the needle tube and needle seat of the existing puncture needle are formed into one piece by injection molding, there is a risk that the adhesive material may leak onto the inner wall of the needle tube, which may then be carried into the human body by the sensor and affect the user's health.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a puncture needle, comprising a needle tube for accommodating a sensor and a needle seat disposed at the tail end of the needle tube, the needle tube and the needle seat being an integral structure, the needle tube comprising two symmetrically arranged side plates, the front end of the needle seat being provided with a fixing part, the top surface of the fixing part being provided with an accommodating groove for accommodating the needle tube, the groove depth being greater than the height of the needle tube, the upper part of the two inner side walls of the accommodating groove being provided with protrusions, the protrusions being placed above the side plates and fitting together, the protrusions being provided with a notch in the middle, the notch extending downward to the top surface of the side plates.

[0006] Furthermore, the width of the raised strip is the same as the width of the side plate, and the width of the notch is smaller than the width of the side plate, so that the top surface of the side plate is exposed relative to the raised strip.

[0007] Furthermore, the protrusion includes a front section, a middle section, and a rear section connected in sequence, with a notch provided along the length of the middle section so that the middle section is recessed outward, and the front section and the rear section extending inward along the front and rear sides of the fixing part, respectively.

[0008] Furthermore, the protruding strip and the fixing part are provided on the same top surface, the protruding strip is rectangular and the top is provided with an inwardly inclined guide surface.

[0009] Furthermore, the needle tube also includes a base plate that is perpendicularly connected to the side plate, and a pressing hole is provided on the bottom surface of the fixing part. The pressing hole is connected to the receiving groove so that the base plate covers the pressing hole.

[0010] Furthermore, the base plate and the two side plates together form a groove, and the tail end of the needle tube is provided with several locking holes. The locking holes penetrate the base plate and extend to the lower part of the side plates so that the locking holes are connected to the groove.

[0011] Compared with the prior art, the beneficial effects of this application are as follows: The present invention provides a receiving groove by fixing the front end of the needle seat, and provides a protrusion on the upper part of the two inner side walls of the receiving groove, so that the protrusion presses the side plate, and provides a notch in the middle of the protrusion, which extends downward to the top surface of the side plate, so that the fixing part and the side plate cooperate at the notch to form a small step. This small step can be used to press the needle tube during in-mold injection and reduce the contact area between the fixing part and the inner wall of the needle tube, thereby reducing the risk of the glue leaking into the needle tube. 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 assembly structure of the needle tube and needle hub in the prior art; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the needle tube in this utility model; Figure 4 This is a schematic diagram of the needle holder in this utility model.

[0014] The details of the reference numerals used in the above figures are as follows: 1-Needle, 11-Side plate, 12-Bottom plate, 13-Groove, 14-Card hole; 2-Needle seat, 21-Fixing part, 22-Accommodation groove, 23-Protrusion, 231-Front section, 232-Middle section, 233-Rear section, 234-Notch, 24-Guide surface, 25-Pressure hole; 3-Sensor. Detailed Implementation

[0015] In the description of this application, the term "several" refers to two or more (including two). The terms "installed," "connected," and "linked" should be interpreted broadly. For example, "connection" 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 based on the specific circumstances.

[0016] In the description of this application, the 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 puncture needle includes a needle tube 1 for accommodating a sensor 3 and a needle seat 2 disposed at the tail end of the needle tube 1. The needle tube 1 and the needle seat 2 are integral structures. The needle tube 1 includes two symmetrically arranged side plates 11. The front end of the needle seat 2 is provided with a fixing part 21. The top surface of the fixing part 21 is provided with an accommodating groove 22 for accommodating the needle tube 1. The groove depth of the accommodating groove 22 is greater than the height of the needle tube 1. The upper part of the two inner side walls of the accommodating groove 22 is provided with protrusions 23. The protrusions 23 are placed above the side plates 11 and fit against them. The protrusions 23 are provided with a notch 234 in the middle. The notch 234 extends downward to the top surface of the side plates 11.

[0019] With the above solution, a receiving groove 22 is provided on the top surface of the front fixing part 21 of the needle holder 2. A protrusion 23 is provided on the upper part of the two inner side walls of the receiving groove 22. The two protrusions 23 are symmetrically distributed, so that the protrusions 23 are placed above the side plate 11 and pressed together. Then, a notch 234 is provided on the inner side of the middle of the protrusion 23. The notch 234 extends downward to the top surface of the side plate 11, so that the fixing part 21 and the side plate 11 at the notch 234 cooperate to form a small step. This small step can be used to press down the needle tube 1 during in-mold injection and reduce the contact area between the fixing part 21 and the inner wall of the needle tube 1. That is, the protrusion 23 is positioned relative to the side plate 11, which effectively reduces the risk of the glue leaking into the needle tube 1, avoids the generation of fuzz during demolding, and ensures the safety of use and the health of users.

[0020] In this embodiment, the needle tube 1 is a metal product, and the needle holder 2 is a plastic product. The needle holder 2 is injection molded to form an integral structure with the needle tube 1 to ensure a firm connection. The needle tube 1 has a groove-shaped structure, and the receiving groove 22 matches the needle tube 1. The groove depth of the receiving groove 22 is greater than the height of the needle tube 1, so that the side plate 11 can be completely embedded in the receiving groove 22, and the surface of the fixing part 21 forms a slot for the sensor 3 to be installed, which facilitates the installation of the sensor 3 and effectively utilizes the length of the fixing part 21, thereby shortening the length of the needle tube 1 and reducing production costs. The length of the notch 234 on the protrusion 23 can be set according to the actual application and is not specifically limited here.

[0021] like Figure 2 and Figure 4 As shown, in one specific embodiment of the improvement, the width of the protrusion 23 is the same as the width of the side plate 11, and the width of the notch 234 is smaller than the width of the side plate 11, so that the top surface of the side plate 11 is partially exposed relative to the protrusion 23.

[0022] Specifically, the width of the protrusion 23 is the same as that of the side plate 11, so that the bottom surface of the protrusion 23 can completely fit and press against the top surface of the side plate 11. Furthermore, the width of the notch 234 in the middle of the protrusion 23 is less than the width of the side plate 11, that is, the actual width of the notch 234 is within the width range of the side plate 11. The actual width of the notch 234 can be designed according to actual needs, so that part of the protrusion 23 at the notch 234 still presses against the side plate 11, so that part of the top surface of the side plate 11 is exposed to form a small step structure, which improves the stability and firmness of the needle tube 1 installation and prevents the needle tube 1 from becoming loose or shifting.

[0023] like Figure 4 As shown, in one specific embodiment of the improvement, the protrusion 23 includes a front section 231, a middle section 232 and a rear section 233 connected in sequence. The notch 234 is provided along the length of the middle section 232 so that the middle section 232 is recessed outward. The front section 231 and the rear section 233 are respectively provided to extend inward along the front and rear sides of the fixing part 21.

[0024] Specifically, the outward indentation extends to the left and right sides of the receiving groove 22, and the notch 234 is set along the length of the middle section 232. The notch 234 is rectangular, which greatly reduces the connection area between the protrusion 23 and the inner wall of the needle tube 1. The needle seat 2 also includes a pushing part integrated with the fixing part 21. The cross-sectional area of ​​the pushing part is larger than that of the fixing part 21, so that the end wall of the rear end fits against the pushing part and avoids gaps. In actual injection molding, only the core plate needs to be set at the two notches 234. That is, the core plate is embedded in the small step and abuts against the side plate 11. The structure is simple and conducive to improving production efficiency.

[0025] like Figure 2 and Figure 4As shown, in one specific embodiment of the improvement, the protrusion 23 and the fixing part 21 are provided on the same top surface. The protrusion 23 is rectangular and has an inwardly inclined guide surface 24 at the top.

[0026] Specifically, the sum of the heights of the protrusion 23 and the needle tube 1 is the same as the groove depth of the receiving groove 22, so that the protrusion 23 and the fixing part 21 share the same top surface, avoiding the pit between the fixing part 21 and the protrusion 23, and assisting the guide surface 24 to connect with the top surface of the fixing part 21. The inclination direction of the guide surface 24 is that the left and right sides of the fixing part 21 face the receiving groove 22. The inclination angle of the guide surface 24 is set according to actual needs and is not specifically limited here. The guide surface 24 is a smooth plane. In actual production, the connection points between the two ends of the guide surface 24 and the protrusion 23 and the fixing part 21 are provided with arc segments to avoid sharp segments. When the sensor 3 is installed into the needle tube 1 from top to bottom, the guide surface 24 can guide the sensor 3 to enter, which is conducive to the rapid installation of the sensor 3.

[0027] like Figure 3 and Figure 4 As shown, in one specific embodiment of the improvement, the needle tube 1 also includes a base plate 12 that is perpendicularly connected to the side plate 11. The bottom surface of the fixing part 21 is provided with a pressing hole 25, which is connected to the receiving groove 22 so that the base plate 12 covers the pressing hole 25.

[0028] Specifically, the pressing hole 25 passes through the fixing part 21 and communicates with the receiving groove 22. When the needle tube 1 is inserted into the receiving groove 22 of the fixing part 21, the bottom plate 12 covers the pressing hole 25. In actual production, a matching fixing post is inserted into the pressing hole 25, and the fixing post abuts against the bottom plate 12. Based on the above-mentioned notch 234, the core plate is set to press the side plate 11, so that the needle tube 1 can be clamped up and down when the needle seat 2 is formed in the mold, so as to avoid the needle tube 1 from shifting during glue injection or filling, and improve the accuracy and stability of production.

[0029] like Figure 2 and Figure 3 As shown, in one specific embodiment of the improvement, the base plate 12 and the two side plates 11 together form a groove 13, and the tail end of the needle tube 1 is provided with several locking holes 14. The locking holes 14 penetrate the base plate 12 and extend to the lower part of the side plate 11 so that the locking holes 14 are connected to the groove 13.

[0030] Specifically, the inner wall of the groove 13 is coplanar with the inner side of the protrusion 23, but the inner side of the middle section 232 is staggered from the inner wall of the groove 13. The number of locking holes 14 can be set according to actual production needs. The pushing part of the needle seat 2 is sealed to the tail end of the needle tube 1 by injection molding. That is, after the rubber material passes through the locking hole 14, it forms a limiting post, so that the needle seats 2 above and below the needle tube 1 are connected by the limiting post, and the limiting post can lock the needle tube 1, improving the bonding effect between the needle tube 1 and the needle seat 2. At the same time, the limiting post passes through the bottom plate 12 and is embedded upward into the lower part of the side plate 11, so that multiple transverse blocking structures are generated in the groove 13. On the one hand, the rubber material injected into the groove 13 can improve the strength and bonding effect of the connection structure. On the other hand, when the rubber coating is not firm, it can block the external gas from flowing along the needle tube 1, improving the airtightness of the product after injection molding.

[0031] 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 puncture needle, comprising a needle tube for accommodating a sensor and a needle seat disposed at the tail end of the needle tube, wherein the needle tube and the needle seat are integrally formed, the needle tube includes two symmetrically arranged side plates, and the needle seat has a fixing portion disposed at its front end, characterized in that, The top surface of the fixing part is provided with a receiving groove for accommodating the needle tube. The depth of the receiving groove is greater than the height of the needle tube. The upper part of the two inner side walls of the receiving groove is provided with a protrusion. The protrusion is placed above the side plate and fits against it. A notch is provided in the middle of the protrusion, and the notch extends downward to the top surface of the side plate.

2. The puncture needle according to claim 1, characterized in that, The width of the protrusion is the same as the width of the side plate, and the width of the notch is less than the width of the side plate, so that the top surface of the side plate is exposed relative to the protrusion.

3. A puncture needle according to claim 2, characterized in that, The protrusion includes a front section, a middle section, and a rear section connected in sequence. The notch is provided along the length of the middle section so that the middle section is recessed outward. The front section and the rear section are respectively provided to extend inward along the front and rear sides of the fixing part.

4. A puncture needle according to claim 3, characterized in that, The protruding strip and the fixing part are provided on the same top surface. The protruding strip is rectangular and has an inwardly inclined guide surface at the top.

5. A puncture needle according to claim 1, characterized in that, The needle tube also includes a base plate that is perpendicularly connected to the side plate. The bottom surface of the fixing part is provided with a pressing hole, which is connected to the receiving groove so that the base plate covers the pressing hole.

6. A puncture needle according to claim 5, characterized in that, The base plate and the two side plates together form a groove. The tail end of the needle tube is provided with several locking holes. The locking holes penetrate the base plate and extend to the lower part of the side plates so that the locking holes are connected to the groove.

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