WO2006045215A1

WO2006045215A1 - A safety seringe

Info

Publication number: WO2006045215A1
Application number: PCT/CN2004/001217
Authority: WO
Inventors: Chang-Ming Yang
Original assignee: Chang-Ming Yang
Priority date: 2004-10-27
Filing date: 2004-10-27
Publication date: 2006-05-04
Also published as: CN100502962C; CN101119760A

Abstract

A safety syringe mainly includes a barrel (3) and an actuator (10), a piston (357) is disposed within the barrel (3), and the piston (357) is provided with a groove (351) on the rear end, and a stopper (34) is annularly disposed in the inner edge near to the rear side of the barrel (3), the rear side of the piston (357) is stopped by the stopper (34), and a hub (33) for inserting the needle (1) is disposed on the anterior end of the barrel (3), the actuator (10) is an electric magnet (36) providing with a magnet (37) at its front end, the electric magnet (36) has a magnetic pole opposed to the magnetic pole of the magnet (37); the actuator (10) is stuffed in the rear side of the barrel (3), and the magnet (37) of the front end of the actuator (10) is stuffed in the recess (351) of the rear end of the piston (357), by translating the magnetic pole of the electric magnet (36), the piston (357) is effected by the magnet (37) to produce a forward or backward motion.

Description

Safety syringe

The present invention relates to a safety syringe, and more particularly to a safety syringe which can prevent the syringe from being used twice, and which can be held by the medical staff behind the needle tip of the injection needle before and after use by the medical staff.

Background technique

The conventional syringe is composed of a needle body and a needle cover, wherein the needle body is provided with an injection needle at the front end, and the needle cover is a cylindrical shape, and a receiving hole is formed at the bottom of the needle cover; In the case of such a conventional syringe needle, the needle cover must be removed from the needle body and then inserted into the injection portion of the patient with the needle of the needle, but the conventional syringe must be used after use. Putting the needle cover back on the needle will easily cause the medical staff to be stabbed and cause infection.

It can be seen that there are still many shortcomings in the above-mentioned conventional syringes, which is not a good designer, but needs to be improved.

In view of the shortcomings derived from the above-mentioned conventional syringes, the inventor of the present invention has improved and innovated, and after years of painstaking research, he finally succeeded in research and development of this piece of safety tf'.

Summary of the invention

It is an object of the present invention to provide a safety syringe that avoids secondary use.

A second object of the present invention is to provide a safety syringe that can be destroyed after use.

Another object of the present invention is to provide a safety syringe that avoids the danger of medical personnel being operated. A safety syringe that achieves the above objects of the invention includes:

a syringe, the plug has a set of plugs, a recess is formed at the rear end of the plug, and a stop block is arranged at a position near the rear side of the inner edge of the sleeve, and the rear side of the plug is Is blocked by the blocking block, and a needle seat is arranged at the front end of the syringe for the needle body to be inserted;

a brake, wherein the brake is coupled to a magnet at a front end of the electromagnet, and the magnetic pole of the electromagnet is different from the magnet;

The brake is inserted from the rear side of the syringe, and the magnet at the front end of the brake is inserted into the groove at the rear end of the plug. By switching the magnetic pole of the electromagnet, the plug can be affected by the magnet and the syringe The action of advancing or retreating is generated within.

DRAWINGS

Please refer to the following detailed description of a preferred embodiment of the present invention and the accompanying drawings, which will further understand the technical contents of the present invention and the effect of the object of the present invention; Figure 1 is an exploded view of a side view of the safety syringe of the present invention; Figure 2 is a schematic view of the operation of the safety syringe (1);

Figure 3 is a schematic diagram of the action of the safety syringe (2);

Figure 4 is a side cross-sectional view of the first embodiment of the safety syringe; Figure 5 is a side cross-sectional view of the second embodiment of the safety syringe; Figure 5A is a side cross-sectional view of the third embodiment of the safety syringe; Figure 6 is the safety syringe Figure 7 is a side elevational view of a fifth embodiment of the safety syringe of the present invention; Figure 8 is a side cross-sectional view of the fifth embodiment of the safety syringe; Figure 9 is a fifth embodiment of the safety syringe FIG. 10 is a schematic view showing the operation of the fifth embodiment of the safety syringe; FIG. 11 is a schematic view showing the operation of the fifth embodiment of the safety syringe (III). FIG. FIG. 13 is a schematic view showing the operation of the fifth embodiment of the safety syringe. FIG. 14 is a schematic view showing the operation of the fifth embodiment of the safety syringe (6). FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 16 is a side cross-sectional view of a sixth embodiment of the safety syringe. FIG. Figure 18 is a perspective view of the eighth embodiment of the safety syringe; Figure 19 is a perspective view of the ninth embodiment of the safety syringe; Figure 20 is a tenth embodiment of the safety syringe Figure 21 is a side cross-sectional view of the eleventh embodiment of the safety syringe; Figure 22 is an exploded perspective view of the twelfth embodiment of the safety syringe; Figure 23 is the safety syringe Figure 24 is an exploded perspective view of the fourteenth embodiment of the safety syringe; Figure 25 is an exploded perspective view of the fifteenth embodiment of the safety syringe; Figure 26 Figure 27 is an exploded perspective view of the seventeenth embodiment of the safety syringe; Figure 28 is an exploded perspective view of the eighteenth embodiment of the safety syringe; Figure 29 is an exploded perspective view of the nineteenth embodiment of the safety syringe; Figure 30 is an exploded perspective view of the twentieth embodiment of the safety syringe; Figure 31 is an exploded perspective view showing the twenty-first embodiment of the safety syringe;

Figure 32 is an exploded perspective view of the twenty-second embodiment of the safety syringe;

Figure 33 is an exploded perspective view of the twenty-third embodiment of the safety syringe;

Figure 34 is an exploded perspective view of the twenty-fourth embodiment of the safety syringe;

Figure 35 is an exploded perspective view of the twenty-fifth embodiment of the safety syringe;

Figure 36 is an exploded perspective view of the twenty-sixth embodiment of the safety syringe;

Figure 37 is an exploded perspective view of the twenty-seventh embodiment of the safety syringe;

Figure 38 is a side cross-sectional view showing the twenty-eighth embodiment of the safety syringe;

Figure 39 is a side cross-sectional view showing the twenty-ninth embodiment of the safety syringe;

Figure 40 is a side cross-sectional view of the thirtieth embodiment of the safety syringe;

Figure 40A is a side cross-sectional view of the thirty-first embodiment of the safety syringe;

Figure 41 is a schematic view of the side action of the thirtieth embodiment of the safety syringe (1);

Figure 42 is a schematic view of the side action of the thirtieth embodiment of the safety syringe (2);

Figure 43 is a side cross-sectional view showing the thirty-second embodiment of the safety syringe;

Figure 44 is a schematic view showing the side action of the safe injection of the thirty-third embodiment;

Figure 45 is a side cross-sectional view showing the thirty-third embodiment of the safety syringe;

Figure 45 is a side cross-sectional view of the thirty-fourth embodiment of the safety syringe;

Figure 46 is a side view of the thirty-third embodiment of the safety syringe (1);

Figure 47 is a schematic view of the side action of the thirty-third embodiment of the safety syringe (2);

Figure 48 is a side cross-sectional view showing the thirty-fifth embodiment of the safety syringe;

Figure 49 is a side cross-sectional view showing the thirty-sixth embodiment of the safety syringe;

Figure 50 is a side cross-sectional view showing the thirty-seventh embodiment of the safety syringe;

Figure 51 is a side cross-sectional view showing the thirty-eighth embodiment of the safety syringe;

Figure 52 is a side cross-sectional view showing the thirty-ninth embodiment of the safety syringe;

Figure 53 is a side cross-sectional view showing the fortieth embodiment of the safety syringe;

Figure 54 is a side cross-sectional view of the forty-first embodiment of the safety syringe;

Figure 55 is a side cross-sectional view showing the forty-second embodiment of the safety syringe;

Figure 56 is a side cross-sectional view showing the forty-third embodiment of the safety syringe;

Figure 57 is a schematic view showing the action of the forty-third embodiment of the safety syringe (1);

Figure 58 is a schematic view showing the action of the forty-third embodiment of the safety syringe (2);

Figure 59 is a side cross-sectional view of the forty-fourth embodiment of the safety syringe; [main part representative symbol] Needle body 11 needle needle cover 13 shaft positioning cam 132 guide cam offset angle 14 bending portion projection 151 positioning rod convex 153 check block positioning groove 161 fixing hole check block 163 positioning hole displacement Hole 2 Needle cover base 211 Needle perforation ring stop 213 Connection piece stop block 215 Base recessed hole 217 Housing outer ring elastic sleeve 221 Folded piece guide hole 23 Button body recess 24 Rail receiving groove 242 Bump fixing Slot 244 Check block shaft hole 251 Fixing groove check block 253 Angle locating hole opening 27 Groove connection groove 3 Syringe guide 32 Grip needle seat 331 Lower rod 曰 333 Perforated baffle 35 Push rod stop Block 351 groove elastic body 353 stop block spur 355 rubber plug guide hole 357 sleeve 36 electromagnet 37 magnet

38 Folding part 39 Folding part

4 blood collection device 5 intravenous indwelling needle

6 arteriovenous AV fistula needle 7 butterfly needle

8 collar 9 concave fold

10 brake

The most preferred embodiment of the invention

Referring to Figures 1 and 2 and Figure 3, the safety syringe provided by the present invention comprises:

a syringe 3, the plug 3 is internally provided with a set of plugs 357, a recess 351 is defined in the rear end of the plug 357, and a stop block 34 is arranged at a position near the rear side of the inner edge of the syringe 3. And the rear side of the plug 357 is blocked by the blocking block 34, and a front end of the syringe 3 is provided with a needle seat 33 for inserting the needle body 1 having the injection needle 11;

A brake 10 is attached to a front end of an electromagnet 36 to attract a magnet 37, and the magnetic pole of the electromagnet 36 is different from the magnet 37.

When the safety syringe provided by the present invention is used, the brake 10 is inserted from the rear side of the syringe 3, and the magnet 37 at the front end of the brake 10 is inserted into the groove 351 at the rear end of the plug 357, and then the electromagnet 36 is The magnetic pole is adjusted to be the same as the magnetic pole of the magnet 37. At this time, due to the principle that the magnet 37 is repelled by the same sex, the magnet 37 is pushed by the electromagnet 36 to push the plug 357 forward, and when the plug 357 pushes the syringe 3 At the foremost end of the inside, the injection needle 11 is inserted into the injection portion of the patient or the position of the object to be extracted, and then the magnetic pole of the electromagnet 36 is adjusted to be different from the magnetic pole of the magnet 37, and the principle of the opposite direction of the magnet 37 is adopted. The magnet 37 is caused to drive the sleeve 357 backward, and the object to be extracted (such as blood, medicament or cells, etc.) is drawn into the syringe 3 from the injection needle 11; in addition, after the extraction or injection, the medical staff Only the magnetic pole of the electromagnet 36 needs to be adjusted again to be different from the magnetic pole of the magnet 37, and the magnetic force is adjusted to be large, so that the magnet 37 can be detached from the recess 351 of the plug 357 and adsorbed on the electromagnet 36. Will brake 10 can be pulled out from the rear end of the syringe 3, and the plug 357 is blocked by the stop block 34 of the inner side of the syringe 3, and cannot be withdrawn from the syringe 3. As described above, the present invention The safety syringe provided by the actuator 10 utilizes the attraction or repelling of the electromagnet 36 and the magnet 37 on the brake 10 to drive the plug 357 in the syringe 3 for extraction or injection. Therefore, the safety syringe provided by the present invention is generally The person without the brake 10 can not be used on the hand, so that the used syringe 3 can be prevented from being used twice, and the infection is caused. In addition, the magnet 37 on the brake 10 can be directly disposed on the stopper. The rear side of the 357 (shown in Figure 4).

Referring to FIG. 5 , in the safety syringe provided by the present invention, a baffle 334 may be disposed in the needle base 33. A through hole 333 is defined in the baffle 334, and a front end of the plug 357 is provided with a spur 354, and the outer edge of the spur 354 is covered with a rubber plug 355, so that after the extraction or injection is completed, The magnetic pole of the electromagnet 36 is adjusted to be the same as the magnetic pole of the magnet 37, and the magnetic force of the electromagnet 36 is adjusted. At this time, the plug 357 is pushed forward to the foremost end of the syringe 3 by the influence of the magnet 37, and the sleeve is set. The spur 354 at the front end of the plug 357 pierces the rubber plug 355 and penetrates through the through hole 333, so that the spur 354 is blocked by the baffle 334, so that the plug 357 can no longer be retracted, and the utility can not be reused. The purpose is not to provide a baffle 334 and a through hole 333 in the needle holder 33.

Referring to FIG. 6 , in the safety syringe provided by the present invention, the needle holder 33 can also be wrapped in the syringe 3 , and the needle holder 33 is internally provided with an engaging groove 332 , and the engaging groove 332 is formed by a through hole 333 . Through the rear end of the needle holder 33, the inner side of the barrel 3 is provided with a stopper 34 on the side ring of the needle holder 33. Therefore, after the extraction or injection is completed, the magnetic pole of the electromagnet 36 is adjusted to be the same as the magnetic pole of the magnet 37. The magnetic force of the electromagnet 36 is increased, and the tenon 354 pierces the rubber plug 355 and is inserted into the engaging groove 332 by the through hole 333. At this time, the magnetic pole of the electromagnet 36 is adjusted to be The magnetic poles of the magnets 37 are different, and the magnetic properties of the electromagnets 36 are increased, so that the force of the electromagnets 36 and the magnets 37 can be absorbed, so that the plugs 357 can be separated from the stoppers by the spurs 354. 34 is retracted into the syringe 3.

Referring to Figures 7 to 16, the safety syringe provided by the present invention, especially a safety structure for use on an injection syringe, mainly includes:

a needle body 1, the needle body 1 is provided with an injection needle 11 at the front end;

a needle cover 2 is composed of a base 21 and a retractable outer ring elastic sleeve 22. The front end of the base 21 is provided with a needle through hole 211 penetrating the base 21 and being mounted on the base. A rear end ring of the 21-pin perforation 211 is provided with a ring stop portion 212. The outer edge of the rear end of the base 21 is provided with a connecting piece 213 and a stop block 214, and the outer ring elastic sleeve 22 can be folded. The front end is in contact with the rear end of the base 21, and the rear end of the needle cover 2 is connected to the needle body 1 at the rear end of the elastic sleeve 22.

When the safety syringe provided by the present invention is used, the medical staff sleeves the rear end of the needle body 1 with the syringe 3, and then fastens the buckle block 214 of the leading edge or the trailing edge of the needle body 1 with the connecting piece 213 as The shaft core is pulled away from the needle body 1, and then the stopper block 214 is pulled back, and the base 21 is retracted, and the foldable outer ring elastic sleeve 22 is compressed and placed in the base 21, And the injection needle 11 at the front end of the needle body 1 is pierced by the needle through hole 211 of the base 21, at this time, the medical staff can perform the action of withdrawing or injecting; and when the safety syringe provided by the present invention is used, the medical care is completed. The person only needs to push the stop block 214 forward, so that the base 21 can be used to cover the injection needle 11 forward. At this time, the medical staff pulls the stop block 214 in the direction perpendicular to the injection needle 11, The needle tip of the front end of the injection needle 11 can pass through the ring stop portion 212, so that the injection needle 11 is blocked by the rear side wall surface and the ring stop portion 212 in the base 21, and can no longer be pierced through the needle through hole 211, and the base 21 can not be reached by the needle 11 Further, when the medical staff pulls the stopper 214 in the direction perpendicular to the injection needle 11, the needle tip of the injection needle 11 can be passed through the ring stopper 212, and the medical staff pulls the force again. The locking block 214 can break the connecting piece 213 and separate the blocking piece 214 from the base 21; from the above, the safety syringe provided by the present invention keeps the hand of the medical staff in the injection during operation. The rear of the needle tip of the needle 11 can avoid the danger of the operation of the medical staff. Moreover, after the safety syringe provided by the present invention is used, the rear side wall surface of the base 21 and the ring stop portion 212 are blocked. The injection needle 11 can no longer be pierced through the needle perforation 211, so that the syringe can be prevented from being used twice.

Referring to FIG. 17 and FIG. 18 , in the safety syringe provided by the present invention, the rear end of the needle through hole 211 of the base 21 may not be provided with the ring stop portion 212 , and the outer edge of the base 21 and the blocking block 214 . The upper edge is configured to fasten the snap fastener 23, and a base 215 extends upwardly from the rear end of the stop block 214, and a recess 216 is provided at the front end of the base; thus, the safety syringe provided by the present invention is used. After the completion, the medical staff does not need to push the base 21 forward by the stopping block 214 to cover the injection needle 11, and the blocking block 214 can be pivoted with the connecting piece 213 as the axis, so that the outer edge of the base 21 and The button body 23 disposed on the upper edge of the blocking block 214 is engaged with each other. At this time, the needle tip of the injection needle 11 is received in the recess 216 of the base 215 of the rear end of the blocking block 214, and 21 and the button body 23 provided on the blocking block 214 are snap-fitted to each other, so that the blocking block 214 can not be opened, so that the safety syringe provided by the invention can be prevented from being used twice; The outer edge of the base 21 and the upper edge of the blocking block 214 may not be provided with the buckle body 23, 21 is provided only on the outer edge of the base for a blocking button block 214 snaps into the recess 231 may, and on the outer edge of the base and the concave portions are disposed mutually engaging the buckle body stuck.

Referring to FIG. 19 and FIG. 20, in the safety syringe provided by the present invention, the retractable outer ring elastic sleeve 22 can also be replaced by a plurality of elastic folding pieces 221, and the elastic folding piece 221 is disposed on On the opposite sides of the outer edge of the injection needle 11, the elastic folding piece 221 can also be sleeved on the injection needle 11, and a guide hole 222 is formed in the elastic folding plate 221 for the injection needle 11 to pass through.

Referring to FIG. 21, in the safety syringe provided by the present invention, the base 21 is fastened to the front end of the needle body 1, and the retractable outer ring elastic sleeve 22 is provided with a plurality of pieces received in the base 21. The elastic folding piece 221 is replaced, and the outer edge of the injection needle 11 is sleeved with a needle cover 12; therefore, when the safety syringe provided by the invention is used, only the needle cover 12 needs to be pulled out to be extracted or injected. Action, and when the extraction or injection is completed, the base 21 is pushed forward, so that the foldable outer ring elastic sleeve 221 covers the injection needle 11, and then the stop buckle 214 is perpendicular to the injection needle 11. In the direction of pulling, the tip end of the injection needle 11 passes through the ring stop portion 212, so that the injection needle 11 is blocked by the rear side wall surface and the ring stop portion 212 in the base 21, and cannot be passed through the needle through hole 211 again. The susceptor 21 can no longer be retracted by the injection needle 11 abutting.

Referring to FIG. 22, the safety syringe provided by the present invention, especially for use on an injection syringe The security structure, including:

a needle cover 2 is provided with a needle through hole 211 at the front end of the needle cover 2, and a front piece of the front end of the needle cover 2 is provided with a connecting piece 213 and a front cover provided with a buckle 231 for engaging the needle through hole 211. 23 is connected, and a guide rail 24 is defined on the opposite sides of the needle cover 2, and a receiving groove 241 extends from the front and rear ends of the guide rail 24, and each receiving groove 241 is adjacent to the guide rail 24 There are a plurality of bumps 242. Further, the rear end receiving groove 241 of the guide rail 24 is further connected to a fixing groove 243, and the fixing groove 243 is provided with a plurality of check blocks 244 when the receiving groove 243 is in contact with the receiving groove 241. ; and

A syringe 3 is provided on each side of the barrel 3 with a grip portion 32 connected by a guide rod 31.

Before the safety syringe provided by the present invention is used, the needle body 1 is sleeved on the needle seat 33 at the front end of the syringe barrel 3, and the guide rods 31 on both sides of the syringe barrel 3 are accommodated on the guide rails 24 on both sides of the needle cover 2 The rear end is accommodated in the slot 241, and when the safety syringe provided by the present invention is to be used, the medical staff only needs to open the front cover 23 and rotate the needle cover 2 so that the guide rods 31 on both sides of the syringe 3 are The accommodating groove 241 enters the guide rail 24 through the bump 242, and then holds the grip portion 32 with one hand, and the needle cover 2 is pulled back by the other hand, so that the injection needle 11 is pierced by the needle through hole 211. Then, the needle cover 2 is rotated, and the guide rod 31 on both sides of the syringe 3 is transferred into the accommodating groove 241 at the front end of the guide rail 24, so that the action of extracting or injecting can be performed, and when the safety syringe provided by the present invention is used After that, the medical staff only needs to rotate the needle cover 2 to move the guide rod 31 into the guide rail 24, and pull the needle cover 2 forward, and then turn the guide rod 31 into the receiving groove 241 at the rear end of the guide rail 24, At this time, the medical staff only needs to apply the force to rotate the needle cover 2, so that the guide rod 31 can pass through the check block 244. In the fixing groove 243, the front cover 23 is then placed on the front end of the needle cover 2. Therefore, the safety syringe provided by the present invention can prevent the guide rod 31 from being fixed by the fixing groove 243 by the stopper of the check block 244. The detachment can prevent the safety syringe of the present invention from being used twice; in addition, the grip portion 32 connected by the guide rod 31 can also be disposed on the inner edges of both sides of the needle cover 2, and the opposite of the syringe 3 A guide rail 24 is defined on both sides of the guide rail 24, and a receiving slot 241 is defined in the front and rear ends of the rail 24, and a plurality of bumps 242 are disposed at the position where the receiving slot 241 meets the rail 24, and the rail 24 is further provided. The front end receiving groove 241 is further connected to a fixing groove 243, and the fixing groove 243 is connected with the receiving groove 241 to provide a plurality of check blocks 244 (as shown in FIG. 23).

Referring to FIG. 24, in the safety syringe of the present invention, the needle cover 2 may not be provided with the guide rail 24 and the front cover 23, and the handpiece 32 is not disposed on the syringe 3, and the injection needle 11 is opposite thereto. A shaft 13 is disposed on each side of the shaft, and a positioning protrusion 131 is disposed on one side of the shaft 13 and a guiding protrusion 132 is disposed on the shaft 13 of the other side, and the positioning protrusion 131 is adjacent to the injection needle 11 An offset angle 133 is defined in the recessed portion, and a shaft hole 25 is defined in each of the two ends of the rear end of the needle cover 2, and the shaft cover 13 is formed on the needle cover 2 One or two openings 26 are provided at the vertical position, and the needle cover 2 is disposed on the rear side of the needle through hole 211 When the safety syringe provided by the present invention is used, only the needle cover 2 is rotated about the shaft 13 so that the injection needle 11 can be rotated out of the opening 26 of the needle cover 2 to perform the rotation. The action of withdrawing or injecting, and after the extraction or injection is completed, the needle cover 2 is turned back to the original position again, and then the front end of the needle cover 2 is pushed toward the shaft 13 provided with the positioning protrusion 131, so that the The positioning protrusion 131 of the shaft 13 is pierced by the shaft hole 25, and is attached to the outer wall surface of the needle cover 2 by the offset angle 133 of the positioning protrusion 131, so that the needle cover 2 and the needle body 1 are eccentric. In this case, the needle tip of the injection needle 11 can not pass through the needle hole 211 again through the ring stopper 212. Further, the shaft 13 of the needle body 1 and the shaft hole 25 of the needle cover 2 can also be applied to the blood collection device. 4, intravenous indwelling needle 5, arteriovenous AV fistula needle 6 or butterfly needle 7 (as shown in Figure 25, 26, 27 and 28); In addition, the needle 11 is opposite The side protrusions 131 and the guide protrusions 132 are not disposed on the side shafts 13, and the shaft holes 25 of the needle cover 2 are respectively connected to a fixing groove 251, and A plurality of check stops 252 are disposed at the position where the shaft hole 25 is in contact with the fixing groove 251, and a plurality of angle positioning holes 253 are provided in each of the shaft holes 25 (refer to FIG. 29), so that the needle cover is provided. 2 When the shaft 13 is rotated as an axis, the angle positioning hole 253 can be used to adjust the angle of the required rotation. When the safety syringe provided by the present invention is used, only the needle cover 2 needs to be pushed to make the shaft 13 After entering the fixing groove 251, the shaft 13 can be detached from the fixing groove 251 again by the stopper of the check block 252, so as to prevent secondary use, and the shaft of the above-mentioned syringe 3 13 and the shaft hole 25 of the needle cover 2, the fixing groove 251, the check block 252 and the angle positioning hole 253 can also be applied to the blood collection device 4, the intravenous indwelling needle 5, the arteriovenous AV fistula needle 6 or the butterfly needle 7. (As shown in Figure 30, 31, 32 and Figure 33).

Referring to FIG. 34, in the safety syringe provided by the present invention, the front cover 23 and the guide rail 24 may not be disposed on the needle cover 2, and the handpiece 31 is not disposed on the needle barrel 3, but on the needle body 1 A bent portion 14 is defined. The bent portion 14 is provided with a male plug 15 , and the needle cover 2 is provided with a plurality of grooves 27 corresponding to the position of the male plug 15 of the needle body 1 , and the grooves 27 are connected to each other. The groove 271 is connected, and the groove 27 at the end of the needle cover 2 is a receiving portion 217 extending through the needle cover 2'. In addition, the rear end ring of the needle cover 211 of the needle cover 2 is provided with a ring portion. 212, further, the outer edge of the needle cover 2 and the receiving groove 217 in the needle cover 2 are eccentrically designed; therefore, before the safety syringe provided by the present invention is used, the male plug 15 is plugged in the needle guard The rear end of the cover 2 is in the penultimate recess 27, and the injection needle 11 is wrapped in the needle cover 2. When the action of the extraction or injection is performed, the medical staff only needs to disengage the male plug 15 from the recess 27, and then Pushing the needle cover backward, moving the bending portion 14 to the front end of the connecting groove 271, and allowing the injection needle 11 to pass through the needle through hole 211, and the length of the injection needle 11 reaches the medical care At the request of the member, the male plug 15 can be inserted into the groove 27 closest to the male plug 15, and then the action of withdrawing or injecting is performed; and when the extraction or injection is completed, only the needle cover 2 is required Pushing forward, and then inserting the male plug 15 into the recess 27 of the needle cover 2 at the end, at this time, because the outer edge of the needle cover 2 and the receiving groove 217 in the needle cover 2 are Eccentric design, Therefore, when the needle cover 2 is pushed to the foremost end, the needle tip of the injection needle 11 can be passed through the ring stopper 212, so that the needle tip of the injection needle 11 is blocked by the ring stopper 212 and cannot be pierced again by the needle perforation 211; In the safety syringe provided by the present invention, the needle body 1 may not be provided with the bent portion 14, and the bent portion 14 is disposed on the outer edge of the set of rings 8, and the collar 8 is sleeved on the needle. Between the barrel 3 and the needle body 1 (as shown in FIG. 35), the above-mentioned protrusion 15 can also be of any shape, and the groove 27 of the needle cover 2 corresponds to the protrusion 15 for the protrusion 15 Stuffing (see Figure 34 and Figure 36).

Referring to FIG. 37, in the safety syringe provided by the present invention, the needle body 1 is not provided with a bent portion 14, and a positioning groove 16 is defined in the needle body 1. The bottom of the positioning groove 16 is a a fixing hole 161, and a plurality of non-returning blocks 162 are disposed around the top end of the fixing hole 16 , and a positioning hole 163 is defined in the middle of the positioning hole 16 , and a displacement hole 164 is connected to the upper end of the positioning hole 163 . 16 is for a positioning rod 151 to be inserted, and the bottom end of the positioning rod 151 has a convex circle 152 which can be plugged in the fixing hole 161, the positioning hole 163 or the displacement hole 164, and the top end of the positioning rod 151 is connected. There is a male plug 15 and one or both sides of the male plug 15 are provided with a check stopper 153. Before the safety syringe provided by the present invention is used, the male plug 15 is recessed at the end of the needle cover 2 In the slot 27, the convex circle 152 of the positioning rod 151 is placed in the positioning hole 163 in the positioning groove 16. When the safety syringe provided by the present invention is to be used, the medical staff only needs to make the convexity 152 of the positioning rod 151. Moved into the displacement hole 164 to disengage the plug 15 from the groove 27 The needle cover 2 can be pushed backwards, and the injection needle 11 can be pierced by the needle perforation 211. When the length of the injection needle 11 reaches the requirements of the medical staff, the male plug 15 can be plugged in the closest convexity. The needle 27 of the plug 15 is fixed with the needle cover 2, and then the action of withdrawing or injecting is performed, and after the extraction or injection is completed, the medical staff again moves the convex circle 152 of the positioning rod 151 to the displacement hole 154, so that The male plug 15 is disengaged from the recess 27, and the needle cover 2 is pushed forward, and then the male plug 15 is inserted into the endmost groove 27, and then the convex circle 152 of the positioning rod 151 is pressed into the fixing hole 161. The convex circle 152 is blocked by the check block 162 where the fixing hole 161 is in contact with the positioning hole 163, and the check block 153 provided on the side or both sides of the plug 15 is abutted against the needle guard The inner side wall surface of the cover 2, by means of the double protection, can prevent the needle cover 2 from being retracted again, so as to prevent secondary use.

Referring to Figure 38, the safety syringe provided by the present invention comprises:

a syringe 3, the front end of the syringe 3 is covered with a needle seat 31, and the inside of the syringe 3 is provided with a plurality of blocking blocks 34 at the rear end of the needle holder 33;

a push rod 35, a front end of the push rod 35 is provided with a groove 351, and an elastic wire body 352 is disposed in the groove 351. The elastic wire body 352 has an end connected to the needle seat 33 and the other end is fixed to the groove. Within 351.

After the extraction or injection of the safety syringe provided by the present invention, the medical staff only needs to pull the push rod 35 backward, so that the elastic wire body 352 disposed in the groove 351 will gradually lengthen as the push rod 35 retreats. While playing When the linear body 352 is pulled to the longest length, only the push rod 35 needs to be pulled back, and the needle holder 33 can be pulled into the syringe 3 by the elastic force of the elastic linear body 352 and the pulling force of the push rod 35. The safety syringe provided by the present invention can not be used again; in addition, referring to FIG. 39, the groove 351 can also be disposed at the rear end of the needle holder 33, and the elastic wire body 352 is connected to the push rod. 35 front end, the other end is fixed in the groove 351.

In the safety syringe provided by the present invention, the front end of the push rod 35 may not have a groove 35, and a rod body 331 is connected to the rear end of the needle holder 33. The end of the rod body 331 is connected to the front end of the push rod 35 by an elastic wire body 352, and the elastic wire body 352 is connected to the stop block 353 through the push rod 35 (as shown in FIG. 40 and 41). And as shown in FIG. 42), when the push rod 35 is pulled back, the stopper piece 353 is pushed backward by the push rod 35, and the elastic wire body 352 is elongated, and when the elastic wire body 352 is pulled to the most For a long time, only the push rod 35 needs to be pulled back, and the rod body 331 can pull the needle holder 33 into the syringe 3 by the elastic force of the elastic wire body 352 and the pulling force of the push rod 35; As shown in FIG. 40A, the rod body can also penetrate the push rod and be connected with a stop block 353 by the elastic wire body 352. After the injection or extraction is completed, the push rod 35 is pulled backward to press the elastic wire body. 352, and after the elastic wire body 352 is pressed, the blocking block 353 is bounced back by its elastic force, and the blocking block 353 is caused. The rod body 331 is pulled backward by the force of the rearwardly popping, so that the rod body 331 pulls the needle holder 33 into the barrel; further, the rear end of the rod body 331 may not be connected to the elastic wire body 352, but directly penetrates the rod body 331 The push rod 35 is in contact with the stop block 353.

Referring to FIG. 43, in the safety syringe provided by the present invention, the front end of the push rod 35 may not have a groove 351, and a broken portion 38 is disposed on one side of the front end of the syringe 3, and the front end of the syringe 3 is outside. The edge corresponding to the broken portion 38 is provided with a folding portion 39. After the safety syringe provided by the present invention is used, the medical staff only needs to hold the folding portion 39 to pull outward, and the front end of the syringe 3 can be broken. The portion 38 is broken, and the needle holder 33 is disengaged from the front end of the syringe 3, so that the safety syringe of the present invention cannot be reused; further, the breaking portion 38 and the folding portion 39 can also be applied to the intravenous indwelling needle 5 or the butterfly needle 7 The venous indwelling needle 5 or the butterfly needle 7 is also respectively covered with a needle seat 33 at the front end thereof, and a plurality of blocking blocks 34 are arranged at the rear end of the needle holder 33 (refer to FIG. 44 and FIG. Fives) .

Referring to FIG. 43 and FIG. 44, in the safety syringe provided by the present invention, the groove 351 at the front end of the push rod 3 can also be replaced by a spur 354, and a rubber plug 355 is attached to the outer edge of the ridge 354. The needle holder 33 is internally provided with an engaging groove 332, and the engaging groove 332 extends through the rear end of the needle holder 33 with a through hole 333. After the safety syringe provided by the present invention is used, the medical staff only needs to push the rod 35. Pushing the front end, the rubber plug 355 can be brought into close contact with the rear side wall surface of the engaging groove 332. At this time, the push rod 35 can be pushed forward by force, so that the tenon 354 can pierce the rubber plug 355. When the through hole 333 enters the engaging groove 332 and then the push rod 35 is pulled back, the needle seat 33 is retracted into the syringe 3 as the pull rod 35 retreats. Referring to Figures 45, 46 and 47, the safety syringe provided by the present invention comprises: a syringe 3 having a needle holder 33 at the front end thereof for the needle body 1 to be inserted therein a baffle 334 is disposed in the needle holder 33, and a through hole 333 is defined in the baffle 334;

a pusher 35 is inserted into the syringe 3 from the rear end of the syringe 3, and a spur 354 is disposed at the front end of the push rod 35, and a rubber plug 355 is wrapped on the outer edge of the ridge 354. The push rod 35 is provided with a plurality of air guiding holes 356 on the side of the spur 354.

After the safety syringe provided by the present invention is used, the medical staff only needs to push the push rod 35 to the front end, so that the rubber stopper 355 is closely adhered to the rear side wall surface of the baffle 334, and then the push rod 35 is forced forward. When pushed, the spur 354 will pierce the rubber stopper 355 and puncture the front end of the baffle 334 by the through hole 333, so that the push rod 35 can not be pulled back by the baffle 334 due to the spur 354, and if the medical staff When the push rod 35 is pulled hard backward, the spur 354 is pulled off. At this time, since the rubber stopper 355 at the front end of the push rod 35 has been broken by the spur 354, if the present invention is to be used again, In the safety syringe, when the push rod 35 is pushed forward or backward, the air is leaked from the air guiding hole 356, and the safety syringe provided by the present invention cannot be extracted or injected. In addition, the needle seat 33 is also The baffle 334 and the through hole 333 may be omitted. When the safety syringe provided by the present invention is used, the push rod 35 only needs to be pushed forward, so that the spur 354 can pierce the rubber plug 355, so that the push rod 355 is before. When the push rod 35 is pushed or pulled back, the air will be guided by the air guiding hole 3 56 leaked to avoid secondary use (as shown in Figure 45 A).

Referring to FIG. 48, in the safety syringe provided by the present invention, the needle holder 33 may not be provided with a baffle 334, and the push rod 35 is not provided with a spur 354 and a flow guiding hole 355, and the needle seat 33 is at the side. The outer edge and the inner edge of the opposite side of the needle seat are provided with the same direction of the oblique angle hole 38; after the safety syringe provided by the invention is extracted or injected, the medical staff only needs to grasp the front end of the needle holder 33 and apply force The angle of the beveled hole 38 is outwardly pulled, and the front end of the needle holder 33 can be bent or broken at the position of the beveled hole 38, so that the safety syringe provided by the present invention cannot be used again; in addition, the beveled hole 38 is used. It can also be placed on the needle body 1, the blood vessel 4, the arteriovenous AV fistula needle 6, the butterfly needle 7 or the venous indwelling needle 5 (as shown in Fig. 52 and Fig. 54).

Referring to FIG. 49, in the safety syringe provided by the present invention, the needle holder 33 may not be provided with a baffle 334, and the push rod 35 is not provided with a spur 354 and a guiding hole 356, but is disposed in the needle seat 33. The edge ring is provided with a plurality of annular recesses 39; after the safety syringe provided by the present invention is extracted or injected, the medical staff only needs to grasp the front end of the needle holder 33 and apply force to the side of the syringe 3 to make the needle The front end of the seat 33 is bent or broken at the position of the annular recess 39, so that the safety syringe provided by the present invention cannot be reused; in addition, the annular recess 39 can also be provided in the needle body 1, the blood collection device 4, the arteriovenous AV篓 tube needle 6, butterfly needle 7 or venous indwelling needle 5 (as shown in Figure 51, 53 and Figure 55).

Referring to Figures 56, 57 and 59, the safety syringe provided by the present invention, the needle There is no baffle 334 in the seat 33, and the push rod 35 is not provided with a spur 354 and a guiding hole 355, and a concave portion 9 is arranged on the outer edge of the needle seat 33; when the safety syringe is provided by the present invention After the injection is completed, the medical staff only needs to grasp the front end of the needle holder 33 or the needle body 11 and apply force to the side of the syringe barrel 3, so that the front end of the needle holder 33 is bent or broken at the position of the concave fold portion 9. Therefore, the safety syringe provided by the present invention cannot be reused. Further, referring to FIG. 59, the concave fold portion 9 can also be disposed on the intravenous indwelling needle 5, the butterfly needle 7, the arteriovenous AV fistula needle 6, and the blood collection. The outer edge of the front end of the needle 4 and the needle body 1.

The detailed description of the present invention is intended to be illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention. In the scope of the patent in this case.

In summary, this case is not only innovative in terms of technical thinking, but also able to enhance the above-mentioned multiple functions compared with conventional articles. It should fully comply with the statutory invention patent requirements of novelty and progressiveness, and apply in accordance with the law. This invention patent application, in order to invent, to the sense of virtue.

Industrial Applicability The safety syringe of the present invention, particularly for a safety structure for use on an injection syringe, mainly includes a syringe and a brake, the syringe inner plug is provided with a set of plugs, and a rear end of the plug is opened a groove, and a stop block is arranged at a position close to the rear side of the inner edge of the syringe, the rear side of the plug is blocked by the stop block, and a needle seat is provided at the front end of the syringe for the needle body Inserted, the brake is connected to a front end of an electromagnet to attract a magnet, and the magnetic pole of the electromagnet is different from the magnet; the brake is inserted from the rear side of the barrel, and the magnet of the front end of the brake is inserted into the plug In the groove of the rear end, by switching the magnetic pole of the electromagnet, the plug can be moved by the magnet to cause forward or backward movement in the cylinder. As a result, the syringe can be destroyed after use, which can prevent the syringe from being used twice, and can avoid the danger of medical personnel.

Claims

Claims a safety syringe, and more particularly to a safety structure for use on an injection syringe, comprising: a syringe having a set of plugs, a recess formed in the rear end of the sleeve, and a stop block is arranged at a position of the inner edge of the syringe near the rear side, and the rear side of the plug is blocked by the stop block, and a needle seat is arranged at the front end of the syringe for the needle body to be inserted;

The safety syringe of claim 1 wherein the magnet is also disposed directly on the rear side of the plug. The safety syringe of claim 1 , wherein a baffle is disposed in the needle seat, and a through hole is formed in the baffle, and a front end of the plug is provided with a spur, and the outer edge of the spur is Covered with a rubber stopper. The safety syringe according to claim 1, wherein the needle holder is also provided with no baffle and perforation.

The safety syringe of claim 1 , wherein the needle seat is also wrapped in the syringe, and the needle seat is internally provided with an engaging groove, and the engaging groove is penetrated through the rear end of the needle seat, and the needle The inner edge of the sleeve is provided with a stop block on the side ring of the needle seat, and a front end of the plug is provided with a spur, and the outer edge of the spur is covered with a rubber plug.

A safety syringe, especially a safety structure for use on an injection syringe, comprising - a needle body having an injection needle at a front end thereof;

a needle cover is composed of a base and a retractable outer ring elastic sleeve. The front end of the base is provided with a needle through hole through the base, and is arranged at the back end of the base of the needle. a ring stop portion, and a connecting piece of the rear end of the base is provided with a blocking block, and the retractable outer ring elastic sleeve is connected with the rear end of the base;

The needle cover is connected with the needle body at the rear end of the foldable outer ring elastic sleeve, so that the needle cover covers the injection needle, and the stop buckle is buckled on the front side of the needle body Or the trailing edge, and the needle body is sleeved with the syringe at its rear end.

The safety syringe according to claim 6, wherein the base end of the base of the needle is not provided with a ring stop, and the outer edge of the base and the upper edge of the block are arranged to be fastened to each other. A base is extended upwardly at the rear end of the blocking buckle, and a recessed hole is formed at the front end of the base.

8. The safety syringe of claim 6, wherein the base of the base has no ring stop at the rear end of the needle, and a recess for locking the buckle is provided on the outer edge of the base, and the block is blocked. The rear end of the buckle block extends upwardly from a base, and a recessed hole is formed at a front end of the base, and the outer edge of the base and the recess are provided with a buckle body that can be engaged with each other.

9. The safety syringe according to claim 6, wherein the retractable outer ring elastic sleeve is also replaceable by a plurality of elastic folded sheets, and the elastic folded sheets are disposed on opposite sides of the outer edge of the injection needle.

10. The safety syringe according to claim 9, wherein the elastic folding piece is sleeved on the injection needle, and a guide hole is formed in the elastic folding piece for the injection needle to pass through.

11. The safety syringe according to claim 6, wherein the base is also retracted to the front end of the needle body, and the retractable outer ring elastic sleeve is replaced by a plurality of elastic folded sheets housed in the base. And the outer edge of the needle is provided with a needle cover.

12. A safety syringe, including:

a needle body, the needle body is provided with an injection needle at the front end;

a needle cover having a needle through hole at the front end of the needle cover, and a connecting piece on the outer edge of the front end of the needle cover is connected with a front cover provided with a buckle capable of being inserted into the needle through hole, and the needle guard A guide rail is defined on opposite sides of the cover. The front and rear ends of the guide rail extend with a receiving slot, and each of the receiving slots is provided with a plurality of bumps at the end of the guide rail. Further, the rear end of the guide rail is received. The slot is further connected to a fixing slot, and the fixing slot is provided with a plurality of check stops at the place where the receiving slot meets;

a syringe, the two sides of the syringe are provided with a grip connected by a guide rod;

The needle system is sleeved on the front end of the barrel, and the guide rods on both sides of the barrel are received in the receiving grooves at the rear ends of the guide rails on both sides of the needle cover.

13. The safety syringe according to claim 12, wherein the guiding portion connected by the guiding rod is also disposed on the inner edges of the two sides of the needle cover, and the guide rails are formed on opposite sides of the barrel. The front and rear ends of the guide rail are provided with a plurality of convex points, and the front end receiving groove of the guide rail is further connected with a fixing groove, and the fixing groove is fixed. A plurality of check blocks are provided in contact with the accommodating groove.

14. The safety syringe according to claim 12, wherein the needle cover does not have a guide rail and a front cover, and the handpiece is not provided on the syringe, and a shaft is disposed on opposite sides of the needle. One side of the shaft is provided with a positioning protrusion, and the other side of the shaft is provided with a guiding protrusion, and the positioning protrusion is concavely disposed with an offset angle near the injection needle, and the needle A shaft hole is respectively defined at a position corresponding to the two shafts on both sides of the rear end of the cover, and one or two openings are provided at a position perpendicular to the shaft hole on the needle cover The mouth is further provided with a ring stop on the back side of the needle through hole.

15. The safety syringe according to claim 14, wherein the shaft of the needle body and the shaft hole of the needle cover are also applicable to a blood collection device, a venous indwelling needle, an arteriovenous AV fistula needle or a butterfly needle.

16. The safety syringe according to claim 14, wherein the shafts on opposite sides of the injection needle are not provided with a position bump and a guide protrusion, and the shaft holes on the needle cover are respectively fixed with a fixing groove. When the shaft hole is in contact with the fixing groove, a plurality of non-returning blocks are arranged, and a plurality of angular positioning holes are arranged in each of the shaft holes.

17. The safety syringe according to claim 16, wherein the shaft hole of the needle body and the shaft hole of the needle cover, the fixing groove, the check block and the angle positioning hole are also applicable to the blood collection device, the intravenous indwelling needle, and the movement. Venous AV fistula needle or butterfly needle.

18. The safety syringe according to claim 12, wherein the needle cover does not have a front cover and a guide rail, and the handpiece is not provided on the needle barrel, and a bent portion is extended on the needle body, and the bent portion is extended. A protruding plug is disposed on the needle cover, and a plurality of grooves are formed on the needle cover corresponding to the position of the protruding body of the needle body, and the grooves are connected by a connecting groove, and the groove at the end of the needle cover is inserted through the needle The receiving portion of the needle cover has a ring stop portion. Further, the outer edge of the needle cover and the receiving groove in the needle cover are eccentrically designed.

19. The safety syringe according to claim 18, wherein the needle body is not provided with a bent portion, and the bent portion is disposed on an outer edge of the ring, and the collar is sleeved on the syringe and Between the needles.

The safety syringe according to claim 18, wherein the needle body is not provided with a bent portion, and a positioning groove is formed in the needle body, the bottom of the positioning groove is a fixing hole, and the top of the fixing hole is fixed. The peripheral ring is provided with a plurality of non-returning blocks, and a positioning hole is formed in the middle of the positioning groove, and a displacement hole is connected to the upper end of the positioning hole. In addition, the positioning groove is for a positioning rod to penetrate, and the positioning rod is The bottom end has a convex circle which can be plugged on the fixing hole, the positioning hole or the displacement hole, and the top end of the positioning rod is connected with a male plug, and one side or both sides of the protruding plug are provided with a check stopper.

21. A safety syringe, especially a safety structure for use on an injection syringe, comprising:

a syringe, the front end of the syringe is covered with a needle seat, and a plurality of stoppers are arranged inside the needle ring at the rear end of the needle holder;

a push rod, the front end of the push rod is provided with a groove, and an elastic wire body is disposed around the groove, and one end of the elastic wire body is connected with the needle seat, and the other end is fixed in the groove.

22. The safety syringe according to claim 21, wherein the groove is also disposed at the rear end of the needle holder, and the elastic body is connected at one end to the front end of the push rod, and the other end is fixed in the groove.

The safety syringe according to claim 21, wherein the front end of the push rod is not provided with a groove, and a rod body is connected to the rear end of the needle seat, and the end of the rod body is connected with the elastic rod body and the push rod. Connected, and the elastic body is connected to a stop block through the push rod.

24. The safety syringe of claim 23, wherein the shaft is permeable to the push rod and is coupled to a stop block by an elastic body.

25. The safety syringe according to claim 21, wherein the rear end of the rod body is not connected to the elastic wire body, and the rod body is directly connected to the stopper block through the rod through the push rod.

The safety syringe according to claim 20, wherein the front end of the push rod is not provided with a groove, and a broken portion is provided on one side of the front end of the syringe, and the outer edge of the front end of the syringe corresponds to the position of the broken portion. There is a folding part.

The safety syringe according to claim 24, wherein the breaking portion and the folding portion are also applied to a venous indwelling needle or a butterfly needle, and the intravenous indwelling needle or the butterfly needle is also covered with a needle at a front end thereof. a seat, and a plurality of stop blocks on the rear end ring of the needle seat.

The safety syringe according to claim 21, wherein the groove of the front end of the push rod is replaced by a spur, the outer edge of the spur is provided with a rubber plug, and the inside of the needle seat is provided with an engaging groove. And the engaging groove penetrates the rear end of the needle seat with a hole.

27. A safety syringe, and more particularly a safety structure for use on an injection syringe, comprising:

a needle barrel having a needle holder at the front end of the needle barrel for inserting the needle body thereon, and a stopper plate having a perforation in the needle holder; and

a push rod, the push rod is inserted into the barrel from the rear end of the syringe, and a front end of the push rod is provided with a spur, and a rubber plug is coated on the outer edge of the spur, and the push rod is on the spur There are several drainage holes on the side.

28. The safety syringe of claim 27, wherein the needle holder is also provided with no baffles and perforations.

The safety syringe according to claim 27, wherein the inner edge of the front end of the syringe tube is not provided with a baffle, and the push rod is not provided with a spur and a guide hole, and the outer edge of the needle seat side and The inner edge of the needle seat on the opposite side is provided with an oblique angled hole in the same direction.

30. The safety syringe according to claim 27, wherein the inner edge of the front end of the syringe tube is not provided with a baffle, and the push rod is not provided with a spur and a guide hole, and the inner ring of the needle seat is provided with a plurality of rings. Concave hole.

31. The safety syringe of claim 29, wherein the angled aperture is also disposed on the needle body, the blood collection device, the arteriovenous AV fistula needle, the intravenous indwelling needle or the butterfly needle.

32. The safety syringe according to claim 29, wherein the annular recess is also provided on the needle body, the blood collection device, the arteriovenous AV fistula needle, the intravenous indwelling needle or the butterfly needle.

33. The safety syringe according to claim 27, wherein the needle holder is not provided with a baffle, and the push rod is not provided with a spur and a guide hole, and a concave portion is disposed on the outer edge of the needle seat.

34. The safety syringe according to claim 33, wherein the concave portion is also disposed on a rim of the venous indwelling needle, the blood collection device, the arteriovenous AV fistula needle, the butterfly needle or the needle body.