CN213964646U

CN213964646U - Anti-acupuncture mechanism and safe indwelling needle

Info

Publication number: CN213964646U
Application number: CN202021885394.0U
Authority: CN
Inventors: 张传雷; 王国辉
Original assignee: Suzhou Linhwa Medical Devices Co ltd
Current assignee: Suzhou Linhwa Medical Devices Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-08-17
Anticipated expiration: 2030-09-02

Abstract

The utility model discloses a needle is kept somewhere to acupuncture prevention mechanism and safe type, including having the inside protection seat of cavity, the protection seat has and extends to its tail end and rather than the coaxial through hole of axis from its front end, the inside activity body that is provided with of cavity, the activity body has rather than the coaxial central through hole of axis, the inside biggest internal diameter of cavity of protection seat is greater than the biggest external diameter of activity body makes and works as the activity body is located during the inside bottom of cavity, the through hole with central through hole is not coaxial, the cavity inside of protection seat has an application of force mechanism and ensures the activity body breaks away from with the needle tubing smoothly. The beneficial effects of the utility model are mainly embodied in that: the position of the movable body is limited by arranging the positioning ring to ensure that the movable body is separated from the needle tube, so that the movable body can block the extension of the needle tube after being separated from the needle tube, the effect of sealing the needle tube is achieved, and the use safety of the indwelling needle is ensured.

Description

Anti-acupuncture mechanism and safe indwelling needle

Technical Field

The utility model relates to the technical field of injection instruments, concretely relates to needle is kept somewhere to safe type with prevent acupuncture mechanism.

Background

The venous indwelling needle can reduce the pain of a patient caused by repeated venipuncture and the fear of injection, relieve the anxiety of family members, facilitate clinical medication, help emergency medication of critical patients, relieve the workload of nurses and reduce the pain of the patient, so the venous indwelling needle is widely applied clinically.

The existing vein indwelling needle is withdrawn after being used, the needle head is polluted by blood of a patient, medical workers are easy to be stabbed by the needle head to infect diseases when pulling away or cleaning the indwelling needle, and meanwhile, the exposed waste needle head is easy to cause environmental pollution in the environment, so that serious potential safety hazard exists.

Chinese patent CN201481960U discloses a safety type vein indwelling needle with a needle tip shielding assembly, wherein an elastic steel sheet in the needle tip shielding assembly bounces a blocking sheet to block a needle tube, so that the needle tube cannot penetrate out again, thereby preventing the medical staff from being injured by acupuncture. However, the elastic steel sheet is easy to lose elasticity, once the blocking piece cannot be bounced, the effect of blocking the needle tube from penetrating out again cannot be achieved, the function of preventing needle-stick injury is lost, and potential safety hazards exist. In order to solve the technical problems, Chinese patents CN202822325U and CN203169724U both disclose a needle-prick prevention protection component, and the principle of the needle-prick prevention protection component is that a spring plate is used for clamping or blocking a needle tube so that the needle tube cannot penetrate out again. However, the prior art needle stick protection assemblies have a common problem: because the needle tube is always pressed by the elastic steel sheet and tends to be bent in the protective seat in the process of being pulled out, the friction force between the needle tube and the protective seat is very large, so that medical personnel need to use very large force when pulling out the needle tube, the operation is extremely inconvenient, and even more, the catheter which is already positioned in the vein is pulled out due to the overlarge force, and unnecessary medical accidents are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects existing in the prior art and providing a needle-prick prevention mechanism and a safe indwelling needle.

The purpose of the utility model is realized through the following technical scheme:

prevent acupuncture mechanism, including having the inside protection seat of cavity, protection seat has and extends to its tail end and rather than the coaxial through-hole of axis from its front end, the inside activity body that is provided with of cavity, the activity body has rather than the coaxial central through-hole of axis, the inside biggest internal diameter of cavity of protection seat is greater than the biggest external diameter of activity body, makes and works as the activity body is located when the inside bottom of cavity, the through-hole with central through-hole is not coaxial, the inside force application mechanism that has of cavity of protection seat ensures the activity body breaks away from with the needle tubing smoothly.

Preferably, the protection seat is formed by fixedly connecting a shell and a base, the base is provided with a bullet-shaped top end with the diameter smaller than the bottom of the base, and the hollow interior is arranged between the top end and the inner wall of the shell.

Preferably, the movable body includes the head and the pole portion of tubaeform, the head with the junction of pole portion is provided with a holding ring, the holding ring is fixed inside the protection casing and as forcing mechanism will the head is injectd the inner wall of shell with between the preceding terminal surface of holding ring.

Preferably, the outer wall of the positioning ring is attached to the inner wall of the housing, and the diameter of the inner wall of the positioning ring is smaller than the maximum outer diameter of the head.

Preferably, a linear distance between the top end and the inner wall of the positioning ring is greater than a length of the movable body.

Preferably, the inner wall of the retaining ring has an inwardly projecting protrusion.

Preferably, the front end of the housing has a resilient catch.

The safety type indwelling needle comprises a catheter seat, a catheter component and a needle tube component, wherein the catheter component is fixed at the far end of the catheter seat and used for transfusion, the needle tube component at least comprises a needle tube seat and a needle tube, the near end of the needle tube is inserted into the needle tube seat and fixed with each other, the far end of the needle tube penetrates through the anti-acupuncture mechanism, and in an initial state, the far end of the needle tube penetrates through the through hole and the central through hole and extends out of the anti-acupuncture mechanism; in a second state, the distal end of the needle tube is separated from the central through hole and is enclosed in the through hole in the anti-needle-stick mechanism.

Preferably, the distal end of the needle tube is provided with a flat concave part with a diameter larger than that of the tube body, and the through hole is positioned at the bottom of the base and is provided with an opening with a diameter smaller than that of the flat concave part.

Preferably, the side part of the needle tube seat is provided with a handle

The beneficial effects of the utility model are mainly embodied in that:

1. the position of the movable body is limited by arranging the positioning ring to ensure that the movable body is separated from the needle tube, so that the movable body can block the extension of the needle tube after being separated from the needle tube, the effect of sealing the needle tube is achieved, and the use safety of the indwelling needle is ensured;

2. the inner wall of the positioning ring is provided with a convex block which protrudes inwards, so that after the movable body is separated from the needle tube, the movable body is inclined due to the existence of the convex block, the central through hole of the movable body cannot keep the same axis with the needle tube, and the needle tube cannot penetrate through the movable body again to extend out;

3. the needle tube body is provided with a flat concave part with the outer diameter larger than the diameter of the needle tube body, so that the bottom opening of the through hole can clamp the flat concave part, the needle tube cannot be pulled out of the protective seat, and the use safety of the indwelling needle is further ensured.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1: a schematic view of a needle stick prevention mechanism;

FIG. 2: a partial explosion schematic diagram of the safety type indwelling needle;

FIG. 3: the safe type indwelling needle is partially cut away.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 1, the utility model discloses a prevent acupuncture mechanism, including having the inside protection seat 1 of cavity, protection seat 1 has from its front end to its tail end and rather than coaxial through-hole 101 of axis, the inside activity body 2 that is provided with of cavity, activity body 2 has rather than coaxial central through-hole 203 of axis, the inside maximum internal diameter of cavity of protection seat 1 is greater than the maximum external diameter of activity body 2 makes and works as activity body 2 is located during the inside bottom of cavity, through-hole 101 with central through-hole 203 is not coaxial, the inside of cavity of protection seat 1 has a force application mechanism and ensures that activity body 2 breaks away from with the needle tubing smoothly.

The protection seat 1 in the preferred embodiment is formed by fixedly connecting a shell 102 and a base 103, the base 103 has a bullet-shaped top end 104 with a diameter smaller than the bottom thereof, and the hollow interior is formed between the top end 104 and the inner wall of the shell 102. The base 103 extends into the housing 102, and the bullet-shaped top 104 improves the smoothness and convenience of the base 103.

As shown in fig. 1, the movable body 2 in the preferred embodiment includes a head portion 201 and a rod portion 202, a positioning ring 3 is disposed at a joint of the head portion 201 and the rod portion 202, and the positioning ring 3 is fixed inside the protective seat 1 and serves as the force application mechanism to limit the head portion 201 between an inner wall of the housing 102 and a front end surface of the positioning ring 3. The positioning ring 3 is arranged to define the front and rear positions of the movable body 2. At the same time, the linear distance between the tip 104 and the inner wall of the positioning ring 3 is greater than the length of the movable body 2, so as to ensure that the hollow interior has enough space to enable the needle tube 5 to exit the central through hole 203 in the movable body 2 and to disengage from the movable body 2.

Further, the outer wall of the positioning ring 3 is attached to the inner wall of the housing 102, and the diameter of the inner wall is smaller than the maximum outer diameter of the head 201, so that the positioning ring 3 can block the head 201 to ensure that the movable body 2 cannot move back synchronously with the needle tube 5 to ensure that the movable body and the needle tube are separated from each other.

As shown in fig. 1 and 2, the inner wall of the positioning ring 3 has an inwardly protruding projection 301. The protrusion 301 may cause the movable body 2 to be tilted after being separated from the needle tube 5, so that the central through hole 203 of the movable body 2 cannot keep the same axis with the needle tube 5, and the needle tube 5 cannot penetrate through the movable body 2 again to extend out, thereby ensuring the safety in use.

Further, the front end of the housing 102 has an elastic claw 105. The anti-needle stick mechanism can be snapped into engagement with other components by the resilient fingers 105.

As shown in fig. 2 and fig. 3, the present invention further discloses a safety indwelling needle, a catheter assembly and a needle tube assembly connected with each other, wherein the catheter assembly comprises a catheter holder and a catheter fixed at the distal end thereof for infusion, the needle tube assembly at least comprises a needle tube seat 4 and a needle tube 5, the proximal end of the needle tube 5 is inserted into the needle tube seat 4 and fixed with each other, the distal end of the needle tube 5 passes through the anti-acupuncture mechanism, and in an initial state, the distal end of the needle tube 5 passes through the through hole 101 and the central through hole 203 and extends out of the anti-acupuncture mechanism; in the second state, the distal end of the needle tube 5 is separated from the central through hole 203 and is sealed in the through hole 101 in the anti-needle-stick mechanism.

As shown in FIG. 3, the distal end of the needle tube 5 has a flat recess 501 with a diameter larger than the diameter of the tube body, and the opening 1011 of the through hole 101 at the bottom of the base 103 has a smaller diameter than the flat recess 501. The flat recess 501 is disposed such that the bottom opening 1011 of the through hole 101 can catch the flat recess 501, so that the needle tube 5 cannot be pulled out from the protective seat 1, thereby further ensuring the safety of use.

In addition, in order to facilitate daily practical operations of medical staff, the side of the needle hub 4 is provided with a handle 401.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. Prevent acupuncture mechanism, its characterized in that: including having the inside protection seat (1) of cavity, protection seat (1) has and extends to its tail end and rather than coaxial through hole (101) of axis from its front end, the inside activity body (2) that is provided with of cavity, activity body (2) have rather than coaxial central through-hole (203) of axis, the inside biggest internal diameter of cavity of protection seat (1) is greater than the biggest external diameter of activity body (2), makes and works as activity body (2) are located during the inside bottom of cavity, through hole (101) with central through-hole (203) are not coaxial, the inside application of force mechanism that has of cavity of protection seat (1) ensures activity body (2) breaks away from with the needle tubing smoothly.

2. The needle stick prevention mechanism of claim 1, wherein: the protection seat (1) is formed by fixedly connecting a shell (102) and a base (103), the base (103) is provided with a bullet-shaped top end (104) with the diameter smaller than the bottom of the base, and the hollow interior is arranged between the top end (104) and the inner wall of the shell (102).

3. The needle stick prevention mechanism of claim 2, wherein: the movable body (2) comprises a horn-shaped head (201) and a rod part (202), a positioning ring (3) is arranged at the joint of the head (201) and the rod part (202), the positioning ring (3) is fixed inside the protective seat (1) and serves as a force application mechanism, and the head (201) is limited between the inner wall of the shell (102) and the front end face of the positioning ring (3).

4. The needle stick prevention mechanism of claim 3, wherein: the outer wall of the positioning ring (3) is attached to the inner wall of the shell (102), and the diameter of the inner wall of the positioning ring is smaller than the maximum outer diameter of the head part (201).

5. The needle stick prevention mechanism of claim 4, wherein: the linear distance between the top end (104) and the inner wall of the positioning ring (3) is larger than the length of the movable body (2).

6. The needle stick prevention mechanism of claim 5, wherein: the inner wall of the positioning ring (3) is provided with a convex block (301) which extends inwards.

7. The needle stick prevention mechanism of claim 2, wherein: the front end of the housing (102) is provided with an elastic claw (105).

8. Safety type indwelling needle, interconnect's catheter subassembly and needle tubing subassembly, the catheter subassembly includes the pipe seat and fixes at its distal end, is used for the pipe of infusion, the needle tubing subassembly includes needle tube seat (4) and needle tubing (5) at least, the near-end of needle tubing (5) is inserted and is located in needle tube seat (4) and reciprocal anchorage, its characterized in that: the distal end of the needle tube (5) passes through the anti-needle-stick mechanism according to any one of claims 1 to 7, and in an initial state, the distal end of the needle tube (5) passes through the through hole (101) and the central through hole (203) and protrudes from the anti-needle-stick mechanism; in a second state, the distal end of the needle tube (5) is separated from the central through hole (203) and is enclosed in the through hole (101) in the anti-needle-stick mechanism.

9. The safety type indwelling needle according to claim 8, wherein: the distal end of the needle tube (5) is provided with a flat concave part (501) with the diameter larger than that of the tube body, and the diameter of an opening (1011) of the through hole (101) at the bottom of the base (103) is smaller than that of the flat concave part (501).

10. The safety type indwelling needle according to claim 9, wherein: the side part of the needle tube seat (4) is provided with a handle (401).