Anti-stick injury needle

Abstract

The utility model relates to medical instrument technical field especially is involved in a kind of anti-stab needle, including needle body and the protective shell of outer sleeve in the outside of needle body, the needle body includes needle tip, needle seat and needle tube connected in turn, the side of needle seat is also equipped with needle wing, the inside of protective shell is equipped with the passageway for needle body reciprocating sliding, and the side wall of protective shell is also equipped with the notch for needle wing to penetrate, the inner wall of passageway is equipped with first limit piece and second limit piece, when needle tip extends to the outside of passageway first limit piece is limited with needle seat cooperation, when needle tip is retracted to the inside of passageway second limit piece is limited with needle seat cooperation, the utility model protects needle head by protective shell, eliminates needle tip of needle head stab injury, reduces the probability of infection infectious disease by needle tip stab injury, with safe and reliable advantage.

Description

Technical Field

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

[0002] In routine medical activities such as intravenous infusion, blood transfusion, hemodialysis, blood drawing, and blood donation, medical staff must use disposable needles with drainage tubes. These disposable needles need to be inserted into the patient's blood vessels for infusion or blood drawing. When the patient has a blood-borne infectious disease, the medical staff will have an increased chance of being infected.

[0003] Disposable needles leave their tips exposed to air after disposal, posing a serious safety hazard as they can easily injure the operator or others.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a needle that prevents punctures. This invention protects the needle tip with a protective shell, preventing the needle tip from puncturing people and reducing the chance of contracting infectious diseases from needle pricks. It has the advantages of being safe and reliable.

[0006] The technical solution adopted by this utility model is as follows: a puncture-proof needle includes a needle body and a protective shell covering the outside of the needle body. The needle body includes a needle tip, a needle seat, and a needle tube connected in sequence. A needle wing is also provided on one side of the needle seat. The protective shell has a channel inside for the needle body to slide back and forth, and a notch is also provided on the side wall of the protective shell for the needle wing to pass through. The inner wall of the channel is provided with a first limiting member and a second limiting member. When the needle tip extends out of the channel, the first limiting member is engaged with the needle seat. When the needle tip retracts into the channel, the second limiting member is engaged with the needle seat.

[0007] The needle holder has a first recess, and the side wall of the protective shell has a through hole communicating with the channel. A mounting piece is also engaged in the through hole. The second limiting member is abutted in the through hole through the mounting piece. The second limiting member includes a second top ball and an elastic member. The first limiting member and the second limiting member have the same structure. The first limiting member includes a first top ball. The inner edge of the through hole near the channel has a limiting flange with an inner diameter smaller than the second top ball. The second top ball is pressed outward of the limiting flange by the elastic member. When the needle tip extends outward of the channel, the first top ball engages with the first recess. When the needle tip retracts into the channel, the second top ball engages with the first recess.

[0008] The diameter of the first top bead is smaller than the diameter of the second top bead.

[0009] The first limiting member includes a first convex circle protruding from the inner wall of the channel, and the second limiting member includes a second convex circle protruding from the inner wall of the channel. The needle seat has a second recess. The diameter of the first convex circle is smaller than the diameter of the second convex circle. When the needle tip extends to the outside of the channel, the first convex circle engages with the second recess. When the needle tip retracts to the inside of the channel, the second convex circle engages with the second recess.

[0010] The first limiting member includes a first groove recessed in the inner wall of the channel, and the second limiting member includes a second groove recessed in the inner wall of the channel. The needle seat has a first buckle protruding. When the needle tip extends to the outside of the channel, the first buckle engages with the first groove. When the needle tip retracts to the inside of the channel, the first buckle engages with the second groove.

[0011] The edge of the first groove is provided with a beveled surface.

[0012] The protective shell includes a first shell and a second shell that can be detachably connected. The first shell has a plurality of protrusions, and the ends of the plurality of protrusions are provided with arc-shaped fastening points. The second shell has fastening holes that engage with the arc-shaped fastening points.

[0013] The protective casing also has an observation window.

[0014] The beneficial effects of this utility model are as follows: This utility model protects the needle with a protective shell, preventing needle tip injury and reducing the chance of infection from needle tip injury. It has the advantages of safety and reliability. The protective shell used to protect the needle body is also very convenient to operate. The needle body can be retracted with only one hand. When the blood collection is finished, the needle body can be retracted into the protective shell by flicking the needle wings with one hand, which greatly improves the efficiency of blood collection. In addition, the other hand can press the cotton ball to help the patient stop bleeding, which is more in line with the standard actions and procedures of blood collection. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of an anti-puncture needle according to the present invention;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is a cross-sectional schematic diagram of the first embodiment of the present utility model;

[0019] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of the first shell and the needle body in the first embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the first shell and the needle body in the second embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the first shell and the needle body in the third embodiment of this utility model;

[0023] In the diagram, 1-needle tip, 2-needle seat, 3-needle tube, 4-needle wing, 5-channel, 6-notch, 7-first top bead, 8-first recess, 9-through hole, 10-mounting piece, 11-second top bead, 12-elastic element, 13-limiting flange, 14-first convex circle, 15-second convex circle, 16-second recess, 17-first groove, 18-second groove, 19-first buckle, 20-inverted bevel, 21-first housing, 22-second housing, 23-protruding post, 24-arc-shaped buckle point, 25-buckle hole, 26-observation window. Detailed Implementation

[0024] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0025] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0026] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0027] like Figures 1 to 7As shown, this is an embodiment of the present invention. A puncture-proof needle includes a needle body and a protective shell covering the outside of the needle body. The needle body includes a needle tip 1, a needle seat 2, and a needle tube 3 connected in sequence. A needle wing 4 is also provided on one side of the needle seat 2. The protective shell has a channel 5 inside for the needle body to slide back and forth, and a notch 6 is provided on the side wall of the protective shell for the needle wing 4 to pass through. The inner wall of the channel 5 is provided with a first limiting member and a second limiting member. When the needle tip 1 extends out of the channel 5, the first limiting member is engaged with the needle seat 2. When the needle tip 1 retracts into the channel 5, the second limiting member is engaged with the needle seat 2.

[0028] The beneficial effects of this design are as follows: This utility model protects the needle with a protective shell, preventing needle tip injury and reducing the chance of infection from needle tip pricks. It has the advantages of safety and reliability. The protective shell for protecting the needle is also very easy to operate. The needle can be retracted with just one hand. When blood collection is finished, the needle can be retracted into the protective shell by flicking the needle wings with one hand, which greatly improves the efficiency of blood collection. The other hand can press the cotton ball to help the patient stop bleeding, which is more in line with the standard actions and procedures of blood collection. When the needle is being collected, that is, when the needle tip extends outside the protective shell, it will cooperate with the first limiting member to protect the stability of the needle during blood collection. When the needle tip retracts into the protective shell, it will cooperate with the second limiting member to prevent the needle tip from slipping out of the protective shell again and causing accidental injury.

[0029] Further, the needle holder 2 has a first recess 8, and the side wall of the protective shell has a through hole 9 communicating with the channel 5. A mounting piece 10 is also engaged in the through hole 9. The second limiting member is abutted in the through hole 9 through the mounting piece 10. The second limiting member includes a second top bead 11 and an elastic member 12. The first limiting member and the second limiting member have the same structure. The first limiting member includes a first top bead 7. The inner edge of the through hole 9 near the channel 5 has a limiting flange 13 with an inner diameter smaller than that of the second top bead 11. The second top bead 11 is pressed outward of the limiting flange 13 by the elastic member 12. When the needle tip 1 extends outward of the channel 5, the first top bead 7 engages with the first recess 8. When the needle tip 1 retracts into the channel 5, the second top bead 11 engages with the first recess 8.

[0030] The beneficial effects of this design are as follows: In the first embodiment of this utility model, when the needle body is at the blood collection position, it is fixed by the first top bead of the protective shell and the first recess of the needle body. When the needle body is retracted into the protective shell after blood collection, it is fixed by the second top bead on the protective shell and the first recess of the needle body. Both mating structures can securely fix the needle body. The elastic element adopts the spring of the prior art. The second top bead is compensated by the elastic force of the spring, so that the second top bead and the first recess are more tightly locked.

[0031] Further, the diameter of the first top bead 7 is smaller than the diameter of the second top bead 11.

[0032] The beneficial effects of this design are as follows: the second top bead has a larger diameter, and the engagement between the second top bead and the first recess is more secure, further ensuring that the needle tip will not slip out of the protective shell. When blood collection is completed, the first top bead can be separated from the first recess by simply moving the needle wings, thereby retracting the needle body into the protective shell.

[0033] Further, the first limiting member includes a first convex circle 14 protruding from the inner wall of the channel 5, and the second limiting member includes a second convex circle 15 protruding from the inner wall of the channel 5. The needle seat 2 has a second recess 16 recessed therein. The diameter of the first convex circle 14 is smaller than the diameter of the second convex circle 15. When the needle tip 1 extends to the outside of the channel 5, the first convex circle 14 engages with the second recess 16. When the needle tip 1 retracts into the inside of the channel 5, the second convex circle 15 engages with the second recess 16.

[0034] The beneficial effects of this design are as follows: In the second embodiment of this utility model, both the first and second limiting members adopt a convex circle structure. The diameter of the first convex circle is smaller than that of the second convex circle, which can also make it easier to move the needle body when it is in the blood collection position, and make it more secure when the needle body is retracted into the protective shell. The structure is more streamlined and manufacturing costs are saved.

[0035] Further, the first limiting member includes a first groove 17 recessed in the inner wall of the channel 5, and the second limiting member includes a second groove 18 recessed in the inner wall of the channel 5. The needle seat 2 has a first buckle 19 protruding from it. When the needle tip 1 extends to the outside of the channel 5, the first buckle 19 engages with the first groove 17. When the needle tip 1 retracts into the inside of the channel 5, the first buckle 19 engages with the second groove 18.

[0036] The beneficial effects of this design are as follows, which is the third embodiment of this utility model. Both the first limiting member and the second limiting member adopt a groove structure. The first buckle on the needle seat is respectively engaged with the first groove and the second groove. This connection structure can also fix the position of the needle body. The structure is reasonable and there are fewer accessories.

[0037] Furthermore, the edge of the first groove 17 is provided with a chamfered surface 20.

[0038] The beneficial effects of this design are as follows: the beveled surface of the first groove helps the first buckle slide out of the first groove more easily, allowing the needle to be easily retracted. The needle can be retracted by simply moving the needle wing with one hand. The second groove does not have a beveled surface, so the engagement between the second groove and the first buckle is more secure, preventing the needle tip from slipping out of the protective shell when the needle is discarded and thus failing to prevent punctures. Before using the needle for the first time, the needle tip is usually pushed out of the protective shell by both hands. Even if the engagement between the second groove and the first buckle is very secure, it will not affect the needle's dispensing.

[0039] Further, the protective shell includes a first shell 21 and a second shell 22 that are detachably connected. The first shell 21 is provided with a plurality of protrusions 23, and the ends of the plurality of protrusions 23 are provided with arc-shaped fastening points 24. The second shell 22 is provided with fastening holes 25 that engage with the arc-shaped fastening points 24.

[0040] The beneficial effects of this design are as follows: the protective shell adopts a split structure and a snap-fit ​​connection, which is convenient to assemble and disassemble and is firmly connected. Furthermore, due to the snap-fit ​​structure of the arc-shaped buckle and the buckle hole, there will be a certain gap between the first shell and the second shell. When a pushing force is applied to move the needle, the first shell and the second shell will slightly separate to the sides without completely disassembling, providing space for the needle structure to be separated from each other. The needle in each embodiment can smoothly enter and exit.

[0041] Furthermore, the protective casing is provided with an observation window 26.

[0042] The benefits of this setup are as follows: the observation window makes it easy to observe the blood collection process of the needle.

[0043] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A puncture-resistant needle, comprising a needle body and a protective outer shell covering the needle body, the needle body comprising a needle tip (1), a needle seat (2), and a needle tube (3) connected in sequence, wherein a needle wing (4) is provided on one side of the needle seat (2), characterized in that: The protective shell has a channel (5) for the needle body to slide back and forth inside, and the side wall of the protective shell also has a notch (6) for the needle wing (4) to pass through. The inner wall of the channel (5) is provided with a first limiting member and a second limiting member. When the needle tip (1) extends out of the channel (5), the first limiting member is limited to the needle seat (2). When the needle tip (1) retracts into the channel (5), the second limiting member is limited to the needle seat (2).

2. The anti-puncture needle according to claim 1, characterized in that: The needle seat (2) has a first recess (8) recessed on it. The side wall of the protective shell has a through hole (9) communicating with the channel (5). The through hole (9) is also fitted with a mounting piece (10). The second limiting member is abutted in the through hole (9) through the mounting piece (10). The second limiting member includes a second top bead (11) and an elastic member (12). The first limiting member and the second limiting member have the same structure. The first limiting member includes a first top bead (7). The inner edge of the through hole (9) near the channel (5) is provided with a limiting flange (13) with an inner diameter smaller than that of the second top bead (11). The second top bead (11) is pressed outward of the limiting flange (13) by the elastic member (12). When the needle tip (1) extends out of the channel (5), the first top bead (7) engages with the first recess (8). When the needle tip (1) retracts into the channel (5), the second top bead (11) engages with the first recess (8).

3. The anti-puncture needle according to claim 2, characterized in that: The diameter of the first top bead (7) is smaller than the diameter of the second top bead (11).

4. The anti-puncture needle according to claim 1, characterized in that: The first limiting member includes a first convex circle (14) protruding on the inner wall of the channel (5), and the second limiting member includes a second convex circle (15) protruding on the inner wall of the channel (5). The needle seat (2) has a second recess (16) recessed therein. The diameter of the first convex circle (14) is smaller than the diameter of the second convex circle (15). When the needle tip (1) extends to the outside of the channel (5), the first convex circle (14) engages with the second recess (16). When the needle tip (1) retracts to the inside of the channel (5), the second convex circle (15) engages with the second recess (16).

5. The anti-puncture needle according to claim 1, characterized in that: The first limiting member includes a first groove (17) recessed in the inner wall of the channel (5), and the second limiting member includes a second groove (18) recessed in the inner wall of the channel (5). The needle seat (2) has a first buckle (19) protruding. When the needle tip (1) extends to the outside of the channel (5), the first buckle (19) engages with the first groove (17). When the needle tip (1) retracts into the inside of the channel (5), the first buckle (19) engages with the second groove (18).

6. The anti-puncture needle according to claim 5, characterized in that: The edge of the first groove (17) is provided with a chamfered surface (20).

7. The anti-puncture needle according to claim 1, characterized in that: The protective shell includes a first shell (21) and a second shell (22) that can be detachably connected. The first shell (21) is provided with a plurality of protrusions (23), and the ends of the plurality of protrusions (23) are provided with arc-shaped fastening points (24). The second shell (22) is provided with fastening holes (25) that engage with the arc-shaped fastening points (24).

8. The anti-puncture needle according to claim 1, characterized in that: The protective casing is also provided with an observation window (26).

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