Skin breaking needle assembly

Abstract

A needle handle of a puncture needle head comprises a V-shaped needle holding part, the top end face of the V-shaped needle holding part is a slope face inclining downwards from the rear end to the front end, the front end of the V-shaped needle holding part is small, the tail of the V-shaped needle holding part is large, the two side walls of a V-shaped groove in the tail of the V-shaped needle holding part extend outwards to form side extending arms, and the side extending arms and the V-shaped needle holding part are integrally formed in an injection mode. 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 through a sharp blade head end, the rear end of the groove-shaped needle tube extends to form a fixed tail section, the fixed tail section is inserted into a needle fixing seat portion, located at the tail section, of the bottom of a V-shaped groove, the groove-shaped needle tube is supported on a needle tube bearing wall of the front section of the bottom of the V-shaped groove, and a notch of the needle guide 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, the front section of the groove-shaped needle tube is sleeved with the sheath, and a sleeving opening part is buckled to the V-shaped needle holding part. Meanwhile, holding operation is convenient, and the medical efficiency and safety are effectively improved.

Description

Technical Field

[0001] The present invention relates to a medical device, more specifically to a skin-piercing needle assembly. Background Art

[0002] Blunt needle injection is a common injection method in the medical beauty industry. During the operation, a skin-breaking needle is required to break the skin and make a hole. The existing skin-breaking needle includes a needle and a sheath. The needle usually includes a needle handle. The needle handle is used to hold the hand and fix the puncture needle. The sharp tip of the puncture needle is used to break the skin and make a hole. After the skin-breaking operation, the skin-breaking needle is removed, the hole is found, and then the blunt needle is punctured along the direction of the hole; the sheath covers the puncture needle and is fixed with the needle handle.

[0003] The existing skin-breaking needle has the following defects: 1. The skin-breaking needle has no effective guide for injection. When performing the injection operation after the skin-breaking hole is opened, it is often difficult to remove the skin-breaking needle and then find the opening position of the skin-breaking needle again.

[0004] The needle handle is cylindrical. Although it also adopts a certain degree of flattening design, the skin-breaking needle is small in size and is not easy to hold in the hand.

[0005] The above-mentioned technical defects make it impossible to ensure the medical efficiency and safety of blunt needle injection. Summary of the invention

[0006] Purpose of the invention: To overcome the defects of the prior art, the present invention provides a skin-breaking needle assembly that can guide the injection needle and is easy to hold and operate, thereby effectively improving medical efficiency and safety.

[0007] Another object of the present invention is to provide a skin-breaking needle assembly that can be reliably positioned and matched with the needle handle, thereby achieving reliable protection for the puncture needle.

[0008] To achieve the above object, the present invention provides the following technical solutions: A skin-breaking needle assembly comprises a puncture needle and a sheath, the puncture needle comprises a needle handle and a puncture needle with a sharp blade end, the sheath covers the sharp blade end of the puncture needle, the sheath comprises a barrel-shaped main body and a sleeve interface portion located at the open end of the barrel-shaped main body and sleeved on the needle handle, characterized in that: the needle handle comprises a V-shaped needle holding portion with a V-shaped groove, the top end surface of the V-shaped needle holding portion is a slope surface inclined downward from the rear end to the front end, and then the V-shaped needle holding portion is small at the front end and large at the tail end, both side walls of the V-shaped groove at the tail end of the V-shaped needle holding portion are extended outward with a side expansion arm, the side expansion arm and the V-shaped needle holding portion are integrally injection molded, the bottom of the V-shaped groove has a needle fixing seat portion located at the tail section and a needle tube supporting wall located at the front section, The puncture needle comprises a grooved needle tube with a needle guide groove, the front end of the grooved needle tube is the sharp blade end, the needle guide groove of the grooved needle tube passes through the sharp blade end, a fixed tail section extends from the rear end of the grooved needle tube, the fixed tail section is inserted into the fixed needle seat, the grooved needle tube is supported on the needle tube supporting wall and the notch of the needle guide groove faces upward, the front section of the grooved needle tube carrying the sharp blade end extends out of the front end of the V-shaped groove, The protective sheath covers the front section of the grooved needle tube, and the sheath portion is buckled on the V-shaped needle holding portion.

[0009] Preferably, the sleeve interface portion of the sheath has an upper fitting slope that extends obliquely, a lower fitting wall located on the side of the sleeve interface portion opposite to the upper fitting slope, and two side connecting walls connecting the upper fitting slope and the lower fitting wall. The sleeve interface portion of the sheath is flared, the upper fitting slope is adapted 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 is snap-fitted with the snap-fit ​​recess, the lower fitting wall is positioned against the bottom wall of the V-shaped needle holding portion, and the side connecting wall is positioned with the side stop of the V-shaped needle holding portion.

[0010] Preferably, a positioning groove is provided on the bottom wall of the V-shaped needle holding portion, and a snap-fitting convex strip which snap-fits with the positioning groove is provided on the lower fitting wall.

[0011] Preferably, the positioning groove and the snap-fitting recess are staggered along the extension direction of the V-shaped needle holding portion, and the positioning groove is located between the snap-fitting recess and the front end face of the V-shaped needle holding portion.

[0012] Preferably, the lower fitting wall is a flat surface, and the bottom of the V-shaped needle holding portion is arc-shaped.

[0013] Preferably, the two side arms are columnar, and a plurality of material cutting grooves are distributed at the bottom of the side arms along the extension direction of the side arms. The bottom of the side arms forms a concave-convex anti-slip surface through the material cutting grooves, and the bottom of the material cutting grooves has an ejector pin support point for supporting the mold ejector pin.

[0014] Preferably, the cutting groove is in the shape of an open ring, and a convex portion corresponding to the ring hole of the cutting groove is formed at the bottom of the cutting groove, and the ejector pin supporting point corresponds to the convex portion.

[0015] Preferably, a material reduction groove is provided on the outer side of the end surface of the free end of the side arm, and the end surface of the free end of the side arm forms an end protrusion through the material reduction groove.

[0016] Preferably, a glue dot gap is provided in the middle of the fixed needle seat portion, so that the fixed needle seat portion forms a front seat body and a rear seat body spaced apart along the extension direction of the V-shaped groove through the glue dot gap, and the glue dot gap is filled with fixing glue.

[0017] By adopting the above technical solution, after the puncture guide needle punctures the skin with the puncture needle, a needle entry hole is formed, and the blunt injection needle is inserted into the needle entry hole along the guide needle groove of the grooved needle tube, and then the puncture guide needle is removed, and then the injection operation is performed, thereby realizing the guided needle insertion operation of the blunt injection needle, improving medical efficiency and safety. In addition, the needle handle adopts the tail of the middle part to form a side arm that is unfolded on both sides, so as to facilitate the hand-held operation and the skin breaking operation. The sheath realizes the covering protection of the puncture needle; and the sheath can realize stable positioning and fixing with the V-shaped needle holding part to prevent the sheath from running off and shaking off. Moreover, under the above design, not only the sheath is formed and positioned with the V-shaped needle holding part, but also the sheath expansion design is realized, so that the assembly operation is smoother and the sheath damage to the needle tip is avoided; from another aspect, it can facilitate the assembly operation of the sliding sleeve and the needle, reduce the sheath material and reduce the cost, which can form a large product cost advantage in medical devices with a large number of applications.

[0018] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram of the assembly state of the skin-breaking needle assembly of the present invention; Figure 2 It is a top view of the skin-breaking needle assembly of the present invention; Figure 3 for Figure 2 The cross-sectional view taken along line AA; Figure 4 It is an exploded view of the skin-breaking needle assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the puncture needle of the present invention; Figure 6 It is a schematic diagram of the structure of the sheath of the present invention. DETAILED DESCRIPTION

[0020] See attached Figures 1 to 6The present invention discloses a skin-breaking needle assembly, including a puncture needle 1, which includes a needle handle 11 and a puncture needle 12 with a sharp blade end 121. The sheath 2 covers the sharp blade end 121 of the puncture needle 12, and the needle handle 11 includes a V-shaped needle holding portion 111 with a V-shaped groove 1111. The top surface of the V-shaped needle holding portion 111 is a slope surface 1112 that is inclined downward from the rear end to the front end, and then the V-shaped needle holding portion 111 is small at the front end a and large at the tail end b. Both side walls of the V-shaped groove 1111 at the tail of the V-shaped needle holding portion 111 are extended outward with a side arm 112, and the side arm 112 and the V-shaped needle holding portion 111 are integrally injection-molded. The bottom has a fixed needle seat portion 1113 located at the tail section and a needle tube supporting wall 1114 located at the front section. 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 passes through the sharp blade end 1212. A fixed tail section 122 extends from the rear end of the grooved needle tube 121. The fixed tail section 122 is inserted into the fixed needle seat portion 1113. The grooved needle tube 121 is supported on the needle tube supporting wall 1114 and the notch of the guide needle groove 1211 faces upward. The front section of the grooved needle tube 121 carrying the sharp blade end 1212 extends out of the front end of the V-shaped groove 1111. After the puncture guide needle punctures the skin with the puncture needle, a needle entry hole is formed. The blunt injection needle is inserted into the needle entry hole along the guide needle groove of the grooved needle tube. The puncture guide needle is then removed and the injection operation is performed, thereby realizing the guided insertion operation of the blunt injection needle and improving medical efficiency and safety. The needle handle uses the tail of the middle part to form a side arm 112 that is unfolded on both sides, so as to facilitate hand-held operation and skin breaking operation. The puncture needle 1 is usually equipped with a sheath 2 to protect the puncture needle. The sheath 2 includes a barrel-shaped main body 21 and a socket portion 22 located at the open end of the barrel-shaped main body 21 and sleeved on the needle handle 11. The sheath 2 covers the front section of the grooved needle tube 121, and the socket portion 22 is snapped onto the V-shaped needle holding portion 111.

[0021] The sheath 2 is one of the key components of the puncture needle, which protects the puncture needle of the needle. It not only protects the needle and the operator during use, but also affects the packaging and storage process. The present invention adopts a structural design different from that of conventional puncture needles. Although the traditional barrel-shaped sheath can be used and provides certain protection, the existing sheath has poor matching with the needle handle, and there are problems such as the sheath is easily biased and easy to fall off, which makes the use safety and packaging and storage of the skin-breaking needle inconvenient. Therefore, providing a more matching and reliable sheath is an important research topic of the present invention, as follows: The socket part 22 of the sheath 2 has an upper fitting slope 221 that extends obliquely, a lower fitting wall 222 located on the side of the socket part 22 opposite to the upper fitting slope 221, and two side connecting walls 223 connecting the upper fitting slope 221 and the lower fitting wall 222. The socket part 22 of the sheath 2 is flared, and the upper fitting slope 221 is adapted and positioned with the slope surface 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 surface 1112. The snap-fit ​​rib 224 is snap-fitted with the snap-fit ​​recess 1115. The lower fitting wall 222 is positioned against the bottom wall of the V-shaped needle holding part 111, and the side connecting wall 223 is positioned with the side stop 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-fitting convex strip 225 is provided on the lower fitting wall 222 to snap-fit ​​with the positioning groove 1116. The upper fitting inclined surface 221 and the lower fitting wall 222 arranged on opposite sides of the sleeve interface 22 of the sheath 2 are designed to realize reliable positioning of the sheath and the needle handle to prevent the sheath from running off. A snap-fitting convex rib 224 is provided on the upper fitting inclined surface 221 to snap-fit ​​with the snap-fitting recess 1115 to realize reliable snap-fitting fixation to prevent the sheath from shaking and falling off; at the same time, a snap-fitting convex strip 225 is also provided on the lower fitting wall 222 to snap-fit ​​with the positioning groove 1116 on the bottom wall of the V-shaped needle holding part 111 to realize more reliable snap-fitting fixation. In addition, the positioning groove 1116 and the snap-fitting recess 1115 are staggered along the extension direction of the V-shaped needle holding portion 111, and the positioning groove 1116 is located between the snap-fitting recess 1115 and the front end face of the V-shaped needle holding portion 111. The snap-fitting fixation of the sheath is more reliable. The sheath of the present design can not only be reliably positioned and matched on the needle tip, but also, under the design of the upper fitting slope 221, the sleeve interface of the sheath is flared, which makes it difficult for the sheath to touch the puncture needle when the sheath is put on the sleeve due to the larger flaring design, thereby achieving reliable and safe assembly operation. The portion of the barrel-shaped main body 21 of the sheath 2 that is connected to the upper fitting slope 221 is a flat wall panel 211, and at least two longitudinal ribs 212 are formed on the outer surface of the flat wall panel 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 wall panel is convenient for pinching the sheath for plugging and unplugging operations, and the longitudinal ribs achieve a reinforcing effect. At the same time, the outer surface of the flat wall panel is designed with a concave and convex shape, which is convenient for holding the sheath.

[0022] As another embodiment of the present invention, the lower fitting wall 222 is a flat surface, and the bottom of the V-shaped needle holding portion 111 is an arc, so as to achieve line-surface contact matching and reliable contact clamping.

[0023] The present invention further optimizes the injection needle as follows: The two side arms 112 are columnar, and are adapted to the tail size of the V-shaped needle holding part 111. The bottom of the side arm 112 is provided with a plurality of material cutting grooves 1121 along the extension direction of the side arm 112. The bottom of the side arm 112 forms a concave-convex anti-slip surface through the material cutting grooves 1121. The bottom of the material cutting grooves 1121 has an ejector support point 1122 for supporting the ejector pin of the mold. The material cutting grooves 1121 can avoid the problem of excessive thickness of the side arm, which is easy to sink and shrink during injection molding, and also reduce the material consumption and cost. On the other hand, the presence of multiple spaced material cutting grooves can achieve an anti-slip effect and increase the hand feel. In addition, an advantage is that the ejector contact position of the molding mold for contacting the product and ejecting the product out of the mold can be set in the material cutting grooves 1121, so that the imprint point (i.e., the ejector support point 1122) formed by the contact between the ejector pin and the product is hidden in the material cutting groove, which is not only beautiful, but also does not affect the hand feel of the product when the hand touches the product. The material cutting groove 1121 is in an open ring shape, and a protrusion 1123 corresponding to the ring hole of the material cutting groove 1121 is formed at the bottom of the material cutting groove 1121, and the ejector support point 1122 corresponds to the protrusion 1123, that is, the ejector pushes against the protrusion 1123. Under the premise of ensuring the strength of the product, more material-saving design is achieved.

[0024] To solve the problem of the side arm end being sunken during molding, a material reduction groove 1124 is provided on the outer side of the end surface of the free end of the side arm 112, and an end protrusion 1125 is formed through the material reduction groove 1124. The end of the side arm is designed as a small end to avoid sunken during molding.

[0025] In order to avoid the risk of the puncture needle falling off, a glue-dotting interval 11133 is provided in the middle of the needle-fixing seat 1113, so that the needle-fixing seat 1113 forms a front seat body 11132 and a rear seat body 11131 spaced apart along the extending direction of the V-shaped groove 1111 through the glue-dotting interval 11133, and the glue-dotting interval 11133 is filled with fixing glue (not shown in the figure), so as to achieve more reliable fixing of the puncture needle and avoid the risk of the puncture needle falling off.

[0026] The injection needle of the present invention adopts a design that is significantly different from conventional skin-breaking needles and has the following advantages: After the skin-breaking operation is completed, the needle guide for blunt needle injection is provided, and the operator does not need to find the needle hole, so that the skin-breaking operation and the injection operation can be reliably connected, improving medical efficiency and safety; 2. The design of the needle handle is convenient for holding and observing the operation during the needle guide; 3. The optimized design on the needle handle, such as the material removal groove and the material reduction groove, can achieve reliable shaping of the needle handle, beautiful appearance, improved operating feel and reduced costs; Another important improved design is to provide a matching sheath design based on the above-mentioned special-shaped design of the injection needle, so as to solve the problem that the traditional sheath cannot be well adapted to the above-mentioned injection needle, causing the sheath to fall off easily during the assembly, packaging and use of the injection needle, and to ensure that the sheath is reliably positioned on the needle handle to avoid swaying and loosening.

Claims

1. A skin-breaking needle assembly, comprising a puncture needle and a sheath, wherein the puncture needle comprises a needle handle and a puncture needle with a sharp blade end, the sheath sheaths the sharp blade end of the puncture needle, and the sheath comprises a barrel-shaped body and a sheath portion located at the open end of the barrel-shaped body and sheathed on the needle handle, characterized in that: The needle handle comprises a V-shaped needle holding portion with a V-shaped groove, the top end surface of the V-shaped needle holding portion is a slope surface inclined downward from the rear end to the front end, and the V-shaped needle holding portion is small at the front end and large at the tail end, and both side walls of the V-shaped groove at the tail end of the V-shaped needle holding portion extend outward to form a side expansion arm, and the side expansion arm and the V-shaped needle holding portion are integrally injection-molded, and the bottom of the V-shaped groove has a needle fixing seat portion located at the tail section and a needle tube supporting wall located at the front section. The puncture needle comprises a grooved needle tube with a needle guide groove, the front end of the grooved needle tube is the sharp blade end, the needle guide groove of the grooved needle tube passes through the sharp blade end, a fixed tail section extends from the rear end of the grooved needle tube, the fixed tail section is inserted into the fixed needle seat, the grooved needle tube is supported on the needle tube supporting wall and the notch of the needle guide groove faces upward, the front section of the grooved needle tube carrying the sharp blade end extends out of the front end of the V-shaped groove, The protective sheath covers the front section of the grooved needle tube, and the sheath portion is buckled on the V-shaped needle holding portion.

2. The skin-breaking needle assembly according to claim 1 is characterized in that: the sleeve interface portion of the sheath has an upper fitting slope that extends obliquely, a lower fitting wall located on the side of the sleeve interface portion opposite to the upper fitting slope, and two side connecting walls connecting the upper fitting slope and the lower fitting wall, the sleeve interface portion of the sheath is flared, the upper fitting slope is adapted 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 is snap-fitted with the snap-fit ​​recess, the lower fitting wall is positioned against the bottom wall of the V-shaped needle holding portion, and the side connecting wall is positioned against the side stop of the V-shaped needle holding portion.

3. The skin-breaking needle assembly according to claim 2 is characterized in that: a positioning groove is provided on the bottom wall of the V-shaped needle holding portion, and a snap-fitting convex strip that snaps into engagement with the positioning groove is provided on the lower fitting wall.

4. The skin-breaking needle assembly according to claim 3 is characterized in that the positioning groove and the snap-fitting recess are staggered along the extension direction of the V-shaped needle holding portion, and the positioning groove is located between the snap-fitting recess and the front end face of the V-shaped needle holding portion.

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

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

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

8. The skin-breaking needle assembly according to claim 6 is characterized in that a material-reducing groove is provided on the outer side of the end surface of the free end of the side-spreading arm, and an end protrusion is formed on the end surface of the free end of the side-spreading arm through the material-reducing groove.

9. The skin-breaking needle assembly according to claim 1 is characterized in that a glue-dotting interval is opened in the middle of the fixed needle seat, so that the fixed needle seat forms a front seat body and a rear seat body spaced apart along the extension direction of the V-shaped groove through the glue-dotting interval, and the glue-dotting interval is filled with fixing glue.

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