TWM500586U - Safety needle - Google Patents

Description

Safety needle

The novel belongs to a needle, in particular to a safety needle which can retract the needle into the interior of the syringe.

When the injection device is used, if it is discarded at will, the needle on the needle is likely to cause cross-infection of germs or diseases. The disposable syringe that is widely used at present, this disposable needle is used as garbage after use, but Preventing the abandonment of the needle from injuring the needle and the medical staff inadvertently being used during the course of use. Many prior art devices have a device that can retract the needle into the syringe. Please refer to Figure 1 for the existing The needle can be retracted into a syringe 10 in the syringe, which comprises an injection syringe 11, an injection needle 12 and an injection pusher 13, the needle 12 comprising a needle head 121 and a coupling pocket 122, the needle The portion 121 is disposed outside the syringe and is used for piercing the biological skin during injection, and the coupling recess 122 is a concave recess and a hooking device 123 is disposed on the inner circumference of the recess. The push rod 13 includes a coupling portion 131 which is a convex structure and has an outer shape corresponding to the coupling recess. When the push rod 13 is pushed into the syringe 11, the coupling portion 131 is coupled thereto. The coupling pocket 12 2 and snapped into the coupling pocket 122, so that the push rod 13 is connected and fixed to the needle 12, and the user can pull the needle 12 together with the push rod 13 into the inside of the syringe 11 when the needle is withdrawn. In this way, the needle 12 can be retained in the syringe 11, thereby protecting the needle 12 from exposure and avoiding accidents caused by puncture.

However, although such a syringe improves the problem of the conventional syringe, it has disadvantages in its manufacture. The coupling pocket 12 of the syringe 10 is mostly manufactured by injection molding. And the concave structure needs to be manufactured by using a slider, but such a fine and minute part cannot be assisted by the slider, the process is complicated and complicated, and the yield is very low, making the manufacture quite difficult.

In order to solve the problems caused by the existing injection needle, the present invention provides a safety needle comprising a syringe, a needle seat and a push rod; the syringe is a hollow cylindrical body open at both ends; the needle seat The utility model comprises a needle joint tube and a needle base, the needle base is fixedly connected to the needle joint tube and is movably inserted and partially protrudes an open end of the syringe, and the bottom of the needle base is fixedly connected to more than one a movable arm of the base, wherein a free end of the movable arm of the base extends toward a barrel contact surface to protrude a latching device; the push rod is a long cylinder corresponding to the inner diameter of the cylindrical body of the syringe, and the movable rod is inserted into the movable cylinder The other open end of the syringe, the push rod end inserted in the inner portion of the syringe includes a push rod engaging member, the push rod engaging member is fixedly connected to the push rod and has an outer shape corresponding to the buckle device. When the push rod engaging member is corresponding to the position of the locking device, the push rod engaging member pushes against the locking device and changes the coupling position of the needle base portion to the syringe.

Wherein, the inner tube wall of the syringe is provided with a syringe engagement structure, and the surface of the base of the needle holder forms a base engaging member corresponding to the shape of the engagement structure of the syringe, and the card can be engaged with the syringe The structure is engaged such that the hub base can be detachably inserted inside the barrel.

The pedestal base further includes a pedestal groove and a pedestal rubber ring; the pedestal groove is an annular groove corresponding to the outer surface of the pedestal base, and the pedestal rubber ring The outer shape corresponds to the base groove and is nested within the base groove; the one of the base movable arms protrudes in a reverse direction with respect to the base of the needle base, and the base is movable The arm can be deformed in a radial direction of the base of the hub and relatively moved in position; The free end of the base movable arm forms the hooking device.

Wherein, the long axis direction on the wall of the base of the needle base comprises a plurality of slits; the base of the needle base comprises a cut line, and the cut line is a slit corresponding to the groove of the base.

The push rod includes a push handle and a plug portion, and the plug portion is fixedly coupled to the longitudinal direction of the push handle.

The push rod includes a push handle and a plug portion, and the plug portion is fixedly coupled to the longitudinal direction of the push handle.

The plug portion of the push rod further includes a pusher rubber ring and a protruding portion, the pusher rubber ring is formed or sleeved on a radial circumference of the plug portion; the protruding portion is on the push portion The rod engaging member extends correspondingly to the plug portion, and the protruding portion is shaped to correspond to the hub base.

Preferably, the push rod is disposed under the push rod engaging member along a radial circumference of the push rod, and the rubber ring guiding angle is a sloped configuration; the inner wall of the needle tube A base guiding angle is provided to form a specific oblique angle below the cylinder engaging structure.

Wherein, the hook-shaped appearance of the outer side of the buckle device has a slope of two or more slopes, and the slope provided at the end of the free end is relatively large.

Wherein, the syringe is preferably a square, an elliptical, a circular or a polygonal hollow columnar structure.

Wherein, the syringe is preferably a square, an elliptical, a circular or a polygonal hollow columnar structure.

1. The present invention protects the inside of the syringe with a used needle to prevent the exposed needle from injuring the medical staff or the cleaning personnel during the recovery, resulting in unnecessary infection or cross-contamination of the bacteria.

2. The buckle device of the present invention is a convex hook due to the combination of the needle seat and the push rod. When the injection molding is manufactured, the slider is not needed, the product is not easy to be produced, and the product yield is good. .

3. The needle seat part of the present invention is suitable for general conventional needles, and does not need to manufacture a corresponding needle to reduce waste of resources.

4. The present invention is provided with a cut line cut and a plurality of splits for the needle seat portion, which can reduce the internal resistance of the needle seat when the needle is withdrawn, and improve the feasibility of the present invention.

5. The present invention is provided with a guiding angle on the inner wall of the syringe, which ensures the smooth retraction of the buckle device and reduces the probability of failure of the new type of needle withdrawal.

6. The pusher part of the novel device has a protruding portion, which can increase the pusher area and reduce the residual of the medicine inside the syringe.

7. The push rod of the present invention is provided with a sloped surface, and the inclined surface forms a guiding angle, so that the pusher rubber ring can be easily loaded when the present invention is automatically assembled.

10‧‧‧Syringe

11‧‧‧Injection syringe

12‧‧‧Injection needle

121‧‧‧ needle head

122‧‧‧ coupling pocket

123‧‧‧Hooking device

13‧‧‧Injection putter

131‧‧‧Coupling Department

20‧‧‧ needle body

21‧‧‧Syringe

22‧‧‧ needle seat

221‧‧‧ needle joint tube

222‧‧‧ needle base

2221‧‧‧Base groove

2222‧‧‧Plastic rubber ring

2223‧‧‧Base arm

2224‧‧‧Snap device

2225‧‧‧Base clamps

2226‧‧‧Rip

2227‧‧‧Cut line

23‧‧‧Put

231‧‧‧ push handle

2311‧‧‧ Breaking the gap

232‧‧ ‧ embolization department

2322‧‧‧Push rod fittings

2323‧‧‧Protruding

2324‧‧‧Round hook

24‧‧‧Syringe engagement structure

25‧‧‧Base lead angle

26‧‧‧ Rubber ring guiding bevel

1 is a cross-sectional view of a prior art of a preferred embodiment of the present invention.

2 is a cross-sectional view of the needle body of the preferred embodiment of the present invention.

Figure 3 is a perspective view of a needle hub of the preferred embodiment of the present invention.

4 is a cross-sectional view of a pusher of the preferred embodiment of the present invention.

Figure 5 is a cross-sectional view of the needle holder of the preferred embodiment of the present invention.

Figure 6 is a radial cross-sectional view of the syringe of the preferred embodiment of the present invention.

Figure 7 is a cross-sectional view of the needle holder of the second preferred embodiment of the present invention.

Figure 8 is a cross-sectional view of the needle holder of the third preferred embodiment of the present invention.

Figure 8a is a partial cross-sectional view of the needle holder of the third preferred embodiment of the present invention.

9A-9D are flow charts of the use of the preferred embodiment of the present invention.

Please refer to FIG. 2 , which is a preferred embodiment of the present invention. The utility model relates to a device for inputting a liquid medicament or a medium into a living body, which comprises a syringe 21 , a needle seat 22 and a push rod 23 . .

The shape of the syringe 21 is not limited, and is a hollow columnar body and both ends of the long axis direction are open, and can be used for holding a liquid medicament or medium to be injected. Referring to FIG. 6, the syringe 21 may have a hollow cylindrical structure with a square shape, an elliptical shape, a circular shape or a polygonal shape.

The needle holder 22 is detachably inserted into one end of the barrel 21 and partially protrudes from the barrel 21, and the needle holder 22 includes a needle joint tube 221 and a needle base 222 integrally coupled with the needle joint tube 221 The hollow tube body is open at both ends, and the needle joint tube 221 is fixedly connected to the axial center position of the needle base 222, or can be fixedly connected to the needle base base 222 from the axial center position, as shown in FIG. 7 . Show. The needle-bonding tube 221 of the present embodiment gradually reduces the diameter of the tube from the fixed connection with the needle base 222 to form a tapered tubular body, and the outer shape of the tapered tubular body corresponds to a conventional conventional needle. Fixed to each other. The needle-bonding tube 221 protrudes from the needle barrel 21 after the needle holder 22 is placed in the barrel 21 and is formed into a separable fixed joint.

The needle base 222 is externally shaped to form an inner diameter of the syringe 21 and is formed to be detachably and fixedly engaged, and the needle base 222 is movablely disposed on the cylinder 21 and axially moved to the cylinder 21 . Referring to FIG. 8 , the detachable and fixed engagement of the syringe 21 and the hub base 222 forms a syringe engagement structure 24 on the inner tube wall of the syringe 21 , and the surface of the hub base 222 . Forming a base engaging member 2225 opposite to the outer shape of the syringe engaging structure 24 to engage with the syringe engaging structure 24, wherein the syringe engaging structure 24 of the embodiment is a recess And a protrusion corresponding to the shape of the groove of the barrel engagement structure 24 is provided on the circumference of the tube wall of the contact base 222 and the barrel 21.

Referring to FIGS. 3 and 8 , the hub base 222 can further include a base recess 2221 , a base rubber ring 2222 , and more than one base movable arm 2223 . The pedestal groove 2221 is an annular groove formed on the outer surface of the needle base 222. The pedestal rubber ring 2222 has a shape corresponding to the pedestal groove and is sleeved on the pedestal. In the groove 2221, the base rubber ring 2222 has a waterproof and anti-corrosion function, and the shape corresponds to the inner diameter of the syringe 21 to prevent the liquid medicament or medium contained in the syringe 21 from overflowing.

One of the free ends of the base movable arm 2223 protrudes in a reverse direction with respect to the needle base 222. The base movable arm 2223 can be deformed in a radial direction of the needle base 222 to be relatively moved in position. The free end of the base movable arm 2223 forms a barb-shaped latching device 2224 toward a syringe contact surface. The form of the base movable arm 2223 is not limited. For example, in the embodiment, the longitudinal direction of the tube base 222 includes a plurality of slits 2226, so that the wall of the needle base 222 forms a plurality of holes. The base movable arm 2223, and the free end of the base movable arm 2223, the locking device 2224 can be radially movable to the needle base 222.

Referring to FIG. 4, the push rod 23 is shaped to form a long columnar body corresponding to the inner diameter of the cylindrical body of the syringe 21. The push rod 23 includes a push handle 231 and a plug portion 232. The plug portion 232 is fixedly connected to the plug portion 232. The push handle 231 has a long axis direction and is movably inserted into the inside of the syringe 21 at one of the open ends of the push rod 21 .

The plug portion 232 includes a pusher rubber ring 2321, a push rod engaging member 2322, and a protruding portion 2323. The pusher rubber ring 2321 is formed or sleeved on the radial circumference of the plug portion 232. The liquid medicine or medium contained in the syringe 21 is prevented from leaking out during use, and the medicine or liquid is allowed to enter and exit from the needle holder 22.

The push rod engaging member 2322 extends in the free end direction of the plug portion 232, and the outer shape and position correspond to the locking device 2224 to be hooked to the locking device 2224. The push rod of the embodiment The engaging member 2322 is formed to be tubularly coupled to the plug portion 232, and a free end edge thereof is formed. The annular hook portion 2324 has an outer shape corresponding to the locking device 2224. When the plug portion 232 is pushed into the inner portion of the syringe 21, the annular hook portion 2324 and the locking device 2224 are formed. The pusher 23 can pull the hub 22 into the syringe 21 corresponding to the hooking connection.

The push rod 23 extends at a corresponding position of the push rod engaging member 2322 to protrude from the plug portion 232. The shape of the protruding portion 2323 corresponds to the needle base 222. The main purpose of the push rod 23 is It is avoided that when the above-mentioned snap device 2224 is hooked and connected with the annular hook portion 2324, a cavity is formed inside, which causes residual liquid medicament or medium, and the protrusion can keep the liquid medicament or medium remaining therein as much as possible. It is discharged outside the syringe 21 and completely injected into the living body.

Further, in order to enable the pusher rubber ring 2321 to be smoothly placed on the push rod 23 during manufacture, the push rod 23 is preferably disposed under the push rod engaging member 2322 along the push rod 23 A rubber ring guiding slope 26 is disposed on the radial circumference, and the rubber ring guiding slope 32 is a beveled structure. As shown in FIG. 4, the inclined surface forms a guiding angle to make the pusher rubber ring 2321 better when automatically assembled. Nested into the push rod 23.

Referring to FIG. 5, the hook-like appearance of the outer side of the latching device 2224 may be a slope having two or more slopes, and preferably the slope provided at the end of the free end is relatively large, and the different slopes are designed to be When the user uses the present invention, the first step first sucks the liquid medicament into the syringe 21, at which time the user pushes the push rod 23 completely into the syringe 21 to discharge the gas inside the syringe 21 and return it. Pulling the push rod 23 so that the liquid medicine can be sucked into the syringe 21, but in order to avoid this step, the user attaches the locking device 2224 on the needle seat 22 and the push rod 23 with the ring hook. The portion 2323 is snap-connected so that the needle is pulled back into the interior of the syringe 21, so that the present invention cannot be used, so the slope provided at the end of the free end is larger than the slope of the adjacent slope, so that the user can push When the push rod 23 is inside the syringe 21, the annular hook portion 2324 will first touch the slope with a large slope, and the resistance generated is small. When the slope with a small slope is touched, A large resistance is generated, and the problem of using this embodiment is reduced.

Referring to FIG. 8 , the hub base 222 can further include a cut line 2227 corresponding to a cutout of the base recess 2221 for the purpose of the needle holder 22 and the push rod 23 . When the locking device 2224 is snap-connected with the annular hook portion 2324, the base movable arm 2223 has a longer moment of action, and the base engaging member 2225 is more easily released, thereby reducing the situation in which the needle is not easily retracted. In addition, the inner wall of the barrel 21 can be provided with a base guiding angle 25, preferably disposed at the top edge of the barrel engaging structure 24 to form a specific oblique angle corresponding to the end of the push rod 23, as shown in FIG. 8a. Therefore, the present invention ensures that the needle holder 22 can be smoothly retracted into the syringe 21 during the needle withdrawal to reduce the possibility of needle withdrawal failure and ensure the feasibility of the present invention.

Referring to FIGS. 9A-9D, when the user pushes the push rod 23 from the axial direction of the syringe 21 into the inside of the syringe 21, the annular hook portion 2324 is hooked and engaged with the locking device 2224. The free end of the base movable arm 2223 is pressed and bent toward the inner side in the radial direction of the syringe 21. When the user continues to push the push rod 23 completely into the inside of the syringe 21, the ring can be made. The hook portion 2324 is hooked and fixed to the locking device 2224. Thus, when the user wants to withdraw the needle, the push rod 23 only needs to be pulled back to be collected together with the needle seat 22 inside the syringe 21.

The fixed contact of the push handle 231 and the plug portion 232 may further be provided with a breaking notch 2311. When the user pulls the push rod 23 together with the needle seat 22 into the syringe 21, the push handle The 231 is exposed outside the syringe 21, and the user can break the push handle 231 along the broken notch 2311, thereby preventing the exposed pusher 231 from accidentally pushing the needle holder 22 when the new type is recovered. The outside of the syringe 21 causes an accident of a puncture.

As can be seen from the above description, the present invention has the following advantages:

1. The present invention protects the inside of the syringe with a used needle to prevent the exposed needle from injuring the medical staff or the cleaning personnel during the recovery, resulting in unnecessary infection or cross-contamination of the bacteria.

2. Because the hook part and the push rod combined with the hook part are convex hooks, the utility model does not need to use the slider to assist in the injection molding manufacturing, and is not easy to produce fake products, and has good product quality. rate.

3. The needle seat part of the present invention is suitable for general conventional needles, and does not need to manufacture a corresponding needle to reduce waste of resources.

4. The present invention is provided with a cut line cut and a plurality of splits for the needle seat portion, which can reduce the internal resistance of the needle seat when the needle is withdrawn, and improve the feasibility of the present invention.

5. The present invention is provided with a guiding angle on the inner wall of the syringe, which ensures the smooth retraction of the buckle device and reduces the probability of failure of the new type of needle withdrawal.

6. The pusher part of the novel device has a protruding portion, which can increase the pusher area and reduce the residual of the medicine inside the syringe.

7. The push rod of the present invention is provided with a sloped surface, and the inclined surface forms a guiding angle, so that the pusher rubber ring can be easily loaded when the present invention is automatically assembled.

20‧‧‧ needle body

21‧‧‧Syringe

22‧‧‧ needle seat

221‧‧‧ needle joint tube

222‧‧‧ needle base

23‧‧‧Put

231‧‧‧ push handle

232‧‧ ‧ embolization department

Claims (10)

A safety needle comprising a syringe, a needle seat and a push rod, wherein: the syringe is a hollow cylindrical body open at both ends; the needle seat is detachably inserted at one end of the syringe and partially The needle barrel protrudes from the needle tube, and comprises a needle joint tube and a needle base. The needle joint tube is a hollow tube body and both ends are open, and the bottom of the needle base is fixedly connected to more than one base. a movable arm, the free end of the movable arm of the base extends toward a cylinder contact surface to protrude a latching device; the push rod is inserted into the other open end of the syringe, and is inserted into the inside of the syringe The rod end includes a push rod engaging member fixedly coupled to the push rod and having an outer shape corresponding to the buckle device, the push rod engaging member pushing against the buckle device and the needle base The seat changes the coupling relationship with the syringe. The safety needle of claim 1, wherein the inner tube wall of the syringe is provided with a syringe engagement structure, and the surface of the needle base forms a shape corresponding to the shape of the syringe engagement structure. The base engaging member is engageable with the syringe engaging structure such that the hub base can be detachably inserted inside the barrel. The safety needle of claim 1 or 2, wherein the needle base comprises a base groove and a base rubber ring; the base groove is formed outside the needle base The pedestal rubber ring has a shape corresponding to the pedestal groove and is nested within the pedestal groove; a free end of the pedestal movable arm protrudes in a reverse direction with respect to the pedestal base The base movable arm is deformable in a radial direction of the base of the needle base to be relatively moved in position; the free end of the movable arm of the base forms the hooking device. For example, in the safety needle of claim 3, the long axis direction on the wall of the needle base includes a plurality of slits; the base of the needle includes a cut line corresponding to the base groove One of the incisions. The safety needle of claim 1 or 2, wherein the push rod comprises a push handle and a plug portion, the plug portion being fixedly coupled to the longitudinal direction of the push handle. The safety needle of claim 4, wherein the push rod comprises a push handle and a plug portion, and the plug portion is fixedly coupled to the longitudinal direction of the push handle. The safety needle of claim 6, wherein the plug portion of the push rod further comprises a pusher rubber ring and a protruding portion, and the push rubber ring is formed or sleeved on the diameter of the plug portion. The protruding portion extends beyond the corresponding position of the push rod engaging member to protrude from the plug portion, and the protruding portion is shaped to correspond to the needle base. The safety needle of claim 7, wherein the push rod is disposed under the push rod engaging member along a radial circumference of the push rod, and the rubber guide angle is one. The inclined surface structure; the inner tube wall of the syringe is provided with a base guiding angle, and is disposed under the cylinder engaging structure to form a specific oblique angle. The safety needle of claim 8, wherein the hook-like appearance of the outer side of the buckle device has a slope of two or more slopes, and the slope provided at the end of the free end is relatively large. The safety needle according to claim 9, wherein the syringe is a square, an elliptical, a circular or a polygonal hollow columnar structure.