Skin breaking needle assembly

Abstract

A needle handle of a puncture needle head comprises a V-shaped needle holding portion, the top end face of the V-shaped needle holding portion is a slope face inclining downwards from the rear end to the front end, and then the V-shaped needle holding portion is small in the front end portion and large in the tail portion. A puncture needle of the puncture needle head comprises a groove-shaped needle tube, a needle guide groove of the groove-shaped needle tube penetrates out of a sharp blade head end, the rear end of the groove-shaped needle tube extends to fix a tail section, and the tail section of the groove-shaped needle tube is provided with a V-shaped groove. The fixed tail section is inserted into the needle fixing seat portion, located at the tail section, of the bottom of the V-shaped groove, the groove-shaped needle tube is supported on the needle tube bearing wall of the front section of the bottom of the V-shaped groove, a groove opening of the needle guiding groove faces upwards, the front section, with the sharp blade head end, of the groove-shaped needle tube extends out of a front end opening of the V-shaped groove, and the front section of the groove-shaped needle tube is sleeved with the protective sleeve. And the sleeving port part is buckled on the V-shaped needle holding part. Meanwhile, holding operation is convenient, and the medical efficiency and safety are effectively improved.

Description

Technical Field

[0001] This utility model relates to medical devices, specifically, a skin-piercing needle assembly. Background Technology

[0002] Blunt needle injection is a common injection method in the medical aesthetics industry. The procedure requires a piercing needle to create a hole in the skin. Existing piercing needles consist of a needle tip and a sheath. The needle tip typically includes a handle for gripping and securing the puncture needle. The sharp tip of the puncture needle is used to create the hole. After the piercing is completed, the needle is removed, the hole is located, and then the blunt needle is inserted along the direction of the hole. The sheath covers the puncture needle and is secured to the handle.

[0003] The existing piercing needles have the following defects: 1. The piercing needles do not provide effective guidance for injection. When performing injection after piercing the skin and making an opening, it is often difficult to remove the piercing needle and find the opening position again.

[0004] The needle handle is cylindrical, although it also has a certain degree of flattening design. However, due to the small size of the piercing needle, it is not easy to hold and operate by hand.

[0005] The aforementioned technical defects mean that the efficiency and safety of blunt needle injection in medicine cannot be guaranteed. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology by providing a puncture needle assembly that can guide the injection needle while being easy to hold and operate, thereby effectively improving medical efficiency and safety.

[0007] Another objective of this invention is to provide a puncture needle assembly that reliably positions and engages with the needle handle, thereby providing reliable protection for the puncture needle.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A puncture needle assembly includes a puncture needle head and a sheath. The puncture needle head includes a needle handle and a puncture needle with a sharp cutting edge. The sheath covers the sharp cutting edge of the puncture needle. The sheath includes a barrel-shaped body and a sleeve interface located at the open end of the barrel-shaped body, which is fitted onto the needle handle. The needle handle includes a V-shaped needle-holding part with a V-shaped groove. The top surface of the V-shaped needle-holding part is a sloping surface that slopes downwards from the rear end to the front end. The V-shaped needle-holding part is smaller at the front and larger at the tail. Both sides of the V-shaped groove at the tail end of the V-shaped needle-holding part extend outwards with a side arm, which is integrally injection molded with the V-shaped needle-holding part. The bottom of the V-shaped groove has a needle-fixing seat at the tail end and a needle tube support wall at the front end.

[0010] The puncture needle includes a grooved needle tube with a guide groove. The front end of the grooved needle tube is the sharp cutting edge, and the guide groove of the grooved needle tube extends through the sharp cutting edge. The rear end of the grooved needle tube extends into a fixed tail section, which is inserted into the needle holder. The grooved needle tube is supported on the needle tube support wall with the groove of the guide groove facing upward. The front section of the grooved needle tube carrying the sharp cutting edge extends out of the V-shaped groove front port.

[0011] The sheath covers the front section of the grooved needle tube, and the sheath interface is snapped onto the V-shaped needle holding part.

[0012] Preferably, the sleeve has an inclined upper fitting slope, a lower fitting wall located on the side opposite to the upper fitting slope in the sleeve, and two side connecting walls connecting the upper fitting slope and the lower fitting wall. The sleeve has an flared shape. The upper fitting slope is adapted to and positioned with the slope surface. A snap-fit ​​rib is provided on the upper fitting slope, and a snap-fit ​​recess is provided on the slope surface. The snap-fit ​​rib and the snap-fit ​​recess are engaged. The lower fitting wall is positioned against the bottom wall of the V-shaped needle holder, and the side connecting walls are positioned against the side stops of the V-shaped needle holder.

[0013] Preferably, the bottom wall of the V-shaped needle holder is provided with a positioning groove, and the lower fitting wall is provided with a snap-fit ​​protrusion that engages with the positioning groove.

[0014] Preferably, the positioning groove and the snap-fit ​​notch are staggered along the extension direction of the V-shaped needle holding part, and the positioning groove is located between the snap-fit ​​notch and the front end face of the V-shaped needle holding part.

[0015] Preferably, the lower fitting wall is a flat surface, and the bottom of the V-shaped needle holding part is arc-shaped.

[0016] Preferably, the two side arms are columnar, and the bottom of the side arms has a plurality of material extraction grooves distributed along the extension direction of the side arms. The bottom of the side arms forms an uneven anti-slip surface through the material extraction grooves, and the bottom of the material extraction grooves has an ejector pin support point for providing mold ejector pin support.

[0017] Preferably, the material feeding groove is an open ring shape, and a corresponding protrusion is formed at the bottom of the material feeding groove within the ring hole of the material feeding groove, with the ejector pin support point corresponding to the protrusion.

[0018] Preferably, a material reduction groove is provided on the outer periphery of the end face of the free end of the side extension arm, and an end protrusion is formed on the end face of the free end of the side extension arm through the material reduction groove.

[0019] Preferably, a dispensing interval is provided in the middle of the pin fixing part, so that the pin fixing part forms a front seat body and a rear seat body that are spaced apart along the extension direction of the V-shaped groove through the dispensing interval, and the dispensing interval is filled with fixing adhesive.

[0020] By adopting the above technical solution, after the puncture needle punctures the skin, an entry hole is formed. The blunt needle is then inserted into the entry hole along the guide groove of the grooved needle tube. Afterward, the puncture guide needle is removed, and the injection operation is performed. This achieves guided needle insertion, improving medical efficiency and safety. Furthermore, the needle handle features side arms extending from the middle tail, facilitating hand operation and skin puncture. The sheath provides protection for the puncture needle and ensures stable positioning with the V-shaped needle holder, preventing slippage and detachment. This design not only ensures proper positioning of the sheath and the V-shaped needle holder but also allows for a wider opening, making assembly smoother and preventing damage to the needle tip. Additionally, it facilitates the assembly of the sliding sleeve and needle, reducing material usage and cost, which provides a significant cost advantage in widely used medical devices.

[0021] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is an assembly diagram of the skin-piercing needle assembly of this utility model;

[0023] Figure 2 This is a top view of the piercing needle assembly of this utility model;

[0024] Figure 3 for Figure 2 A sectional view taken along line AA.

[0025] Figure 4 This is an exploded view of the skin-piercing needle assembly of this utility model;

[0026] Figure 5 This is a schematic diagram of the puncture needle of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the sheath of this utility model. Detailed Implementation

[0028] See appendix Figures 1-6This utility model discloses a piercing needle assembly, including a puncture needle head 1, which includes a needle handle 11 and a puncture needle 12 with a sharp blade tip 121. A sheath 2 covers the sharp blade tip 121 of the puncture needle 12. The needle handle 11 includes a V-shaped needle holding part 111 with a V-shaped groove 1111. The top surface of the V-shaped needle holding part 111 is a sloping surface 1112 that slopes downward from the rear end to the front end. The V-shaped needle holding part 111 has a small front end (a) and a large tail end (b). Both sides of the V-shaped groove 1111 at the tail end of the V-shaped needle holding part 111 have outwardly extending side arms 112. The side arms 112 are integrally injection molded with the V-shaped needle holding part 111. The bottom of the needle has a needle holder 1113 at the tail end and a needle tube support wall 1114 at the front end. The puncture needle 12 includes a grooved needle tube 121 with a guide needle groove 1211. The front end of the grooved needle tube 121 is the sharp blade end 1212. The guide needle groove 1211 of the grooved needle tube 121 extends through the sharp blade end 1212. The rear end of the grooved needle tube 121 extends to a fixed tail section 122. The fixed tail section 122 is inserted into the needle holder 1113. The grooved needle tube 121 is supported on the needle tube support wall 1114 with the groove of the guide needle groove 1211 facing upward. The front end of the grooved needle tube 121 carrying the sharp blade end 1212 extends out of the front port of the V-shaped groove 1111. After the skin is punctured by the puncture needle, an inlet hole is formed. The blunt needle is inserted into the inlet hole along the guide groove of the grooved needle tube. The puncture guide needle is then removed before the injection operation. This allows for guided needle insertion of the blunt needle, improving medical efficiency and safety. The needle handle features side arms 112 that extend from the tail of the middle section, facilitating hand operation and skin puncture. The puncture needle 1 is typically equipped with a sheath 2 to protect the puncture needle. The sheath 2 includes a barrel-shaped body 21 and a sleeve interface 22 located at the open end of the barrel-shaped body 21, which is fitted onto the needle handle 11. The sheath 2 covers the front section of the grooved needle tube 121, and the sleeve interface 22 is engaged with the V-shaped needle holder 111.

[0029] The sheath 2 is a key component of the puncture needle, protecting the needle tip during use and affecting both the needle tip and the operator, as well as the packaging and storage process. While the traditional barrel-shaped sheath, designed differently from conventional puncture needles, provides some protection, its poor compatibility with the needle handle leads to issues such as misalignment and detachment, compromising the safety of the puncture needle and hindering packaging and storage. Therefore, providing a more compatible and reliable sheath is a crucial research topic of this invention, as detailed below:

[0030] The sleeve 2 has an upper fitting slope 221 extending at an inclination, a lower fitting wall 222 located on the side opposite to the upper fitting slope 221 in the sleeve 22, and two side connecting walls 223 connecting the upper fitting slope 221 and the lower fitting wall 222. The sleeve 2 has an flared shape. The upper fitting slope 221 is adapted to and positioned with the slope 1112. A snap-fit ​​rib 224 is provided on the upper fitting slope 221, and a snap-fit ​​recess 1115 is provided on the slope 1112. The snap-fit ​​rib 224 and the snap-fit ​​recess 1115 are snapped together. The lower fitting wall 222 is positioned against the bottom wall of the V-shaped needle holding part 111, and the side connecting walls 223 are positioned with the side stops of the V-shaped needle holding part 111. A positioning groove 1116 is provided on the bottom wall of the V-shaped needle holding part 111, and a snap-fit ​​protrusion 225 is provided on the lower fitting wall 222 to engage with the positioning groove 1116. The design of the upper fitting slope 221 and the lower fitting wall 222 on opposite sides of the sleeve interface part 22 of the sheath 2 achieves reliable positioning of the sheath and the needle handle, preventing the sheath from deviating. A snap-fit ​​protrusion 224 is provided on the upper fitting slope 221, which engages with the snap-fit ​​recess 1115 to achieve reliable snap-fit ​​fixation and prevent the sheath from being shaken off. At the same time, a snap-fit ​​protrusion 225 is also provided on the lower fitting wall 222 to engage with the positioning groove 1116 on the bottom wall of the V-shaped needle holding part 111 for more reliable snap-fit ​​fixation. Furthermore, the positioning groove 1116 and the snap-fit ​​notch 1115 are staggered along the extension direction of the V-shaped needle holding part 111, and the positioning groove 1116 is located between the snap-fit ​​notch 1115 and the front end face of the V-shaped needle holding part 111. The sheath snap-fit ​​fixation is more reliable. The sheath designed in this way can not only reliably position and match the needle, but also, with the design of the upper fitting slope 221, the sheath's fitting interface is flared. This makes it less likely for the sheath to come into contact with the puncture needle when it is fitted, thus achieving a reliable and safe assembly operation. The part of the barrel-shaped body 21 of the sheath 2 that connects with the upper fitting slope 221 is a flat wall plate 211. At least two longitudinal ribs 212 are formed on the outer surface of the flat wall plate 211, and the ends of the longitudinal ribs 212 are integrally formed and connected to the plate body where the upper fitting slope 221 is located. The flat panel makes it easy to grip the sleeve for insertion and removal, while the longitudinal ribs provide reinforcement. The uneven design on the outer surface of the flat panel also makes it easy to hold the sleeve.

[0031] In another embodiment of this utility model, the lower fitting wall 222 is a flat surface, and the bottom of the V-shaped needle holding part 111 is arc-shaped. This achieves line-surface contact and fit, ensuring reliable contact and locking.

[0032] The present invention further optimizes the design of the injection needle as follows:

[0033] The two side arms 112 are columnar, adapting to the tail size of the V-shaped needle holder 111. Several ejector grooves 1121 are distributed along the extension direction of the side arms 112, forming a textured anti-slip surface. The bottom of each ejector groove 1121 has an ejector pin support point 1122 for supporting the mold ejector pins. The ejector grooves 1121 prevent excessive thickness of the side arms from causing shrinkage during injection molding, reducing material usage and costs. Furthermore, the multiple spaced ejector grooves provide an anti-slip effect and improve the feel. Another advantage is that the ejector pin contact point (where the mold contacts the product and ejects it) can be located within the ejector groove 1121. This conceals the impression point (i.e., the ejector pin support point 1122) formed by the contact between the ejector pin and the product within the ejector groove, resulting in an aesthetically pleasing design without affecting the feel of the product. The material feeding groove 1121 is an open annular shape, and a corresponding protrusion 1123 is formed at the bottom of the material feeding groove 1121, which is located within the annular hole of the material feeding groove 1121. The ejector pin support point 1122 is located on the protrusion 1123; that is, the ejector pin rests on the protrusion 1123. This design achieves greater material saving while ensuring product strength.

[0034] To address the issue of concavity at the end of the side arm during molding, a material reduction groove 1124 is provided on the outer periphery of the end face of the free end of the side arm 112. An end protrusion 1125 is formed on the end face of the free end of the side arm 112 through the material reduction groove 1124. This achieves a small-end design for the end of the side arm, preventing concavity during molding.

[0035] To avoid the risk of needle dislodgement, a dotted adhesive spacer 11133 is provided in the middle of the needle holder 1113. This spacer forms a front seat 11132 and a rear seat 11131 spaced apart along the extension direction of the V-shaped groove 1111. The dotted adhesive spacer 11133 is filled with adhesive (not shown in the figure). This achieves more reliable fixation of the needle and avoids the risk of needle dislodgement.

[0036] The injection needle of this utility model adopts a design that is significantly different from conventional piercing needles, and has the following advantages:

[0037] After the skin puncture is completed, a blunt needle is provided for injection guidance, eliminating the need for the operator to search for the needle hole. This ensures a reliable connection between the skin puncture and injection procedures, improving medical efficiency and safety. 2. The needle handle design facilitates handholding and observation during needle guidance. 3. Optimized designs on the needle handle, such as material extraction grooves and material reduction grooves, ensure reliable needle handle forming, aesthetically pleasing appearance, improved handling feel, and reduced costs.

[0038] Another important design improvement is the provision of a matching sheath design based on the aforementioned irregular needle shape. This solves the problem that traditional sheaths cannot fit well onto the aforementioned needles, causing the sheaths to easily fall off during needle assembly, packaging, and use. The sheath is reliably positioned on the needle handle, preventing it from shifting or loosening.

Claims

1. A puncture needle assembly, comprising a puncture needle head and a sheath, the puncture needle head comprising a needle handle and a puncture needle having a sharp cutting edge, the sheath covering the sharp cutting edge of the puncture needle, the sheath comprising a barrel-shaped body and a sleeve interface portion located at the open end of the barrel-shaped body and fitted onto the needle handle, characterized in that: The needle handle includes a V-shaped needle-holding part with a V-shaped groove. The top surface of the V-shaped needle-holding part is a sloping surface that slopes downward from the rear end to the front end. The V-shaped needle-holding part is smaller at the front and larger at the tail. Both sides of the V-shaped groove at the tail end of the V-shaped needle-holding part extend outward with a side arm, which is integrally injection molded with the V-shaped needle-holding part. The bottom of the V-shaped groove has a needle-fixing seat at the tail end and a needle tube support wall at the front end. The puncture needle includes a grooved needle tube with a guide groove. The front end of the grooved needle tube is the sharp cutting edge, and the guide groove of the grooved needle tube extends through the sharp cutting edge. The rear end of the grooved needle tube extends into a fixed tail section, which is inserted into the needle holder. The grooved needle tube is supported on the needle tube support wall with the groove of the guide groove facing upward. The front section of the grooved needle tube carrying the sharp cutting edge extends out of the V-shaped groove front port. The sheath covers the front section of the grooved needle tube, and the sheath interface is snapped onto the V-shaped needle holding part.

2. The piercing needle assembly according to claim 1, characterized in that: the sheath has an inclined upper fitting slope at the interface, a lower fitting wall located on the side opposite to the upper fitting slope in the interface, and two side connecting walls connecting the upper fitting slope and the lower fitting wall; the sheath has an flared interface; the upper fitting slope is adapted to and positioned with the slope surface; a snap-fit ​​rib is provided on the upper fitting slope; a snap-fit ​​recess is provided on the slope surface; the snap-fit ​​rib and the snap-fit ​​recess are engaged; the lower fitting wall is positioned against the bottom wall of the V-shaped needle holder; and the side connecting walls are positioned against the side stops of the V-shaped needle holder.

3. The piercing needle assembly according to claim 2, characterized in that: the bottom wall of the V-shaped needle holding part is provided with a positioning groove, and the lower fitting wall is provided with a snap-fit ​​protrusion that engages with the positioning groove.

4. The piercing needle assembly according to claim 3, characterized in that: the positioning groove and the snap-fit ​​notch are staggered along the extension direction of the V-shaped needle holding part, and the positioning groove is located between the snap-fit ​​notch and the front end face of the V-shaped needle holding part.

5. The piercing needle assembly according to claim 2, characterized in that: the lower fitting wall is a straight surface, and the bottom of the V-shaped needle holding part is arc-shaped.

6. The skin-breaking needle assembly according to claim 1, characterized in that: the two side arms are columnar, and a plurality of material-removing grooves are distributed at the bottom of the side arms along the extension direction of the side arms, and the bottom of the side arms forms an uneven anti-slip surface through the material-removing grooves, and the bottom of the material-removing grooves has an ejector pin support point for providing mold ejector pin support.

7. The piercing needle assembly according to claim 6, characterized in that: the material extraction groove is an open ring shape, and a corresponding protrusion is formed at the bottom of the material extraction groove in the ring hole of the material extraction groove, and the pin support point is located on the protrusion.

8. The piercing needle assembly according to claim 6, characterized in that: a material reduction groove is provided on the outer periphery of the end face of the free end of the side extension arm, and an end protrusion is formed on the end face of the free end of the side extension arm through the material reduction groove.

9. The puncture needle assembly according to claim 1, characterized in that: a dotted interval is provided in the middle of the needle fixing part, so that the needle fixing part forms a front seat and a rear seat that are spaced apart along the extension direction of the V-shaped groove through the dotted interval, and the dotted interval is filled with fixing adhesive.

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