CN109260551B - Medical needle with safety protection and self-destruction functions - Google Patents
Medical needle with safety protection and self-destruction functions Download PDFInfo
- Publication number
- CN109260551B CN109260551B CN201811287664.5A CN201811287664A CN109260551B CN 109260551 B CN109260551 B CN 109260551B CN 201811287664 A CN201811287664 A CN 201811287664A CN 109260551 B CN109260551 B CN 109260551B
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- Prior art keywords
- needle
- safety protection
- needle head
- locking
- stop
- Prior art date
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- 230000006378 damage Effects 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 7
- 230000008719 thickening Effects 0.000 claims description 7
- 230000005489 elastic deformation Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 239000008280 blood Substances 0.000 abstract description 6
- 210000004369 blood Anatomy 0.000 abstract description 6
- 206010011409 Cross infection Diseases 0.000 abstract description 5
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 5
- 239000003292 glue Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 238000001802 infusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 208000012266 Needlestick injury Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150885—Preventing re-use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
Abstract
The medical needle with the safety protection and self-destruction functions comprises a needle head and a needle seat, wherein the needle head is fixed on the needle seat, the medical needle also comprises a needle head functional piece, the needle head functional piece comprises a safety protection part and a needle head destruction part, the safety protection part and the needle head destruction part are movably connected, the needle head destruction part contains a liquid substance destroying the needle head, the needle head is arranged in the safety protection part in an unretractable mode, and the needle head destruction part moves relative to the safety protection part to enable the needle head to enter the needle head destruction part to destroy the needle head. The invention has simple structure and easy operation, wherein the self-contained safety protection part can carry out general safety protection on medical needles such as injection needles, blood taking needles, transfusion needles and the like, and meanwhile, the needle head destroying part can realize permanent complete destroy on the needle head, thereby preventing stabbing people and preventing the needle head from being reused and effectively reducing the risk of cross infection.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical needle with safety protection and self-destruction functions, which can completely avoid the risk of cross infection caused by the reuse of the medical needle.
Background
Medical needles such as injection needles, blood collection needles, infusion needles and the like are generally discarded by hands after being used, and the discarded needles are often damaged by needle sticks when waste is cleaned and recovered, so that the risk of cross infection exists. It is therefore necessary to dispose of the used needle in a safe and effective manner.
The patent with publication number CN204910354U discloses a safe self-destroying injection needle, wherein a needle point is hooked by a barb after entering a space between the barb and the bottom of a small U-shaped section groove, and the needle point is kept in the space in a non-withdrawable manner to complete self-destroying, and at the moment, a protective cover is positioned at a complete protection position to prevent stabbing people and reusing. However, the needle protection device of the above patent document has the following disadvantages: although the needle is received in the groove of the protective cover and is hooked and held in the groove in an unrepeatable manner to achieve self-destruction, the safe self-destruction injection needle is easily recovered illegally by lawbreakers and reused if necessary, for example, by cutting, shearing or the like through special tools (for example, the hinge structure of the protective cover is broken, the needle can be directly pulled out of the protective cover), and the needle can be recycled again, which increases the risks of infection and medical accidents of patients to a certain extent.
Therefore, it is necessary to design a medical needle with safety protection and self-destruction functions, which can destroy the needle in a real sense and cannot be reused, so as to solve the problems existing in the prior art.
Disclosure of Invention
Therefore, the invention aims to provide the medical needle with the safety protection and self-destruction functions, which has simple structure, easy operation and can permanently and thoroughly destroy the needle head and prevent the user from being stabbed and reused.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the medical needle with the safety protection and self-destruction functions comprises a needle head and a needle seat, wherein the needle head is fixed on the needle seat, the medical needle also comprises a needle head functional piece, the needle head functional piece comprises a safety protection part and a needle head destruction part, the safety protection part and the needle head destruction part are movably connected, the needle head destruction part contains a liquid substance destroying the needle head, the needle head is arranged in the safety protection part in an unretractable mode, and the needle head destruction part moves relative to the safety protection part to enable the needle head to enter the needle head destruction part to destroy the needle head.
Preferably, the safety protection part is of a safety protection sleeve structure or a safety protection cap structure, the safety protection part and the needle damage part are connected through a sliding guide piece arranged along the axial direction of the safety protection part and the needle damage part, a locking mechanism is arranged at the end part of the connection part of the safety protection part and the needle damage part and is used for preventing the needle damage part from moving randomly along the axial direction of the safety protection part relative to the safety protection part under the condition of no external force, a stop element for limiting the travel of the needle damage part in the safety protection part is further arranged on the inner side wall of the safety protection part, and when the needle damage part moves into the safety protection part along the axial direction of the needle damage part through the sliding guide piece, the needle arranged in the safety protection part is caused to penetrate into the needle damage part and be damaged.
Preferably, the sliding guide comprises a guide part and a sliding part, and the guide part and the sliding part are arranged on the inner side wall of the safety protection part or the outer side wall of the needle damage part in an arbitrary matching way respectively.
Preferably, the guide member includes a guide rail or a guide groove, and the sliding member includes a protrusion or a rib corresponding to the guide member.
Preferably, the locking mechanism comprises a sliding block and a locking stop, the sliding block is arranged on the sliding component or is integrally formed with the sliding component, the locking stop is arranged at the end part of the connecting part of the guide component, which is positioned between the safety protection part and the needle damage part, the locking stop comprises a first locking stop and a second locking stop, the first locking stop and the second locking stop are sequentially arranged along the moving direction of the needle damage part towards the safety protection part, the sliding block is arranged between the first locking stop and the second locking stop, the structural strength of the first locking stop is greater than that of the second locking stop, the first locking stop is not deformed under the action of external force, the second locking stop is deformed under the action of external force, when the needle damage part is subjected to the action of external force, namely, the sliding block is abutted against the second locking stop under the action of external force and forces the second locking stop to deform, the sliding block moves beyond the second locking stop into the guide component to drive the needle part to move, and the first locking damage part can prevent the needle damage part from falling out of the safety protection part.
Preferably, the distance between the stop element and the locking mechanism is L1, and the overall length of the needle damage part is L2, L2: l1=1.1 to 1.3, and the portion of the needle disposed between the stopper element and the locking mechanism has a length of 0.5L1 to 0.75L1.
Preferably, the needle destroying part comprises a hard shell and a container shell, the container shell is arranged in the hard shell and is clung to the inner side wall of the hard shell, one end of the joint of the hard shell and the safety protecting part is provided with a protective layer which is sealed and is easy to be pierced by a needle, the other end is a thickening layer for increasing the structural strength, a plug which is in sealing combination with the end wall of the container shell is formed at the end of the container shell, which corresponds to the protective layer, of the hard shell, and the container shell is filled with liquid substances which can destroy the needle.
Preferably, the liquid substance is a corrosive liquid or a strong glue.
Preferably, when the safety protection part is of a safety protection sleeve structure, the safety protection sleeve is a columnar body with an opening at one side, the safety protection sleeve further comprises a locking element capable of elastic deformation and a longitudinal channel penetrating through the safety protection sleeve, one end of the safety protection sleeve is rotatably connected with the needle seat through a hinge, the needle damage part moves in the longitudinal channel of the safety protection sleeve through a sliding guide piece, the locking mechanism is arranged at the end part of the connection part of the longitudinal channel and the needle damage part, the stop element is arranged in the longitudinal channel, the locking element is arranged at one end of the longitudinal channel close to the hinge, the safety protection sleeve rotates, the needle passes through the locking element capable of elastic deformation and is embedded in the longitudinal channel, and the needle is forced to be arranged in the longitudinal channel of the safety protection sleeve in a non-withdrawable mode after the locking element is restored.
Preferably, the locking element is a back-off, a snap or a clip, and is made of a rigid plastic or metal with elasticity.
Compared with the prior art, the medical needle with the safety protection and self-destruction functions has the advantages that the structure is simple, the operation is easy, the safety protection part can carry out general safety protection on medical needles such as injection needles, blood taking needles and transfusion needles, meanwhile, the needle damage part can realize permanent complete damage on the needle, the stabbing of people is prevented, the needle is prevented from being reused, and the risk of cross infection is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a safety protection sleeve with a safety protection part;
FIG. 2 is a schematic illustration of the construction of the safety shield and the needle destruction;
FIG. 3 is a schematic structural view of a locking mechanism;
FIG. 4 is a schematic view showing the specific construction of the destroying portion of the needle;
FIG. 5 is a schematic side elevational view of the needle damaging portion;
fig. 6 is a schematic structural view of the safety protection part when the safety protection part is a safety helmet.
Reference numerals and description of the components referred to in the drawings:
1. a needle; 2. a needle stand; 3. a collar; 4. a syringe body; 5. a needle destroy section; 6. a liquid substance; 7. a safety protective sleeve; 8. a locking mechanism; 9. a stop element; 10. a locking element; 11. a longitudinal channel; 12. a hinge; 13. a guide member; 14. a sliding member; 15. a slide block; 16. a first lock-up stop; 17. a second lock-up stop; 18. a hard shell; 19. a container housing; 20. a protective layer; 21. thickening layers; 22. a plug; 23. a safety helmet.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in the following detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a medical needle with safety protection and self-destruction functions comprises a needle head 1, a needle seat 2 and a needle head function piece. The needle 1 is fixed to the hub 2 while the hub 2 has a collar 3 with a central hole through which the collar 3 can be fixed to the hub 2 of the syringe body 4. The collar 3 can be in screw connection, clamping connection, friction connection and other detachable connection with the needle seat 2 of the syringe body 4 in a threaded, slot, convex rib and other manners. Of course, the non-detachable connection structure may be formed with the syringe body 4 by welding, integral molding, or the like.
The needle functional piece comprises a safety protection part and a needle destroy part 5, the safety protection part and the needle destroy part 5 are movably connected, the needle destroy part 5 contains a liquid substance 6 which destroys the needle 1, the needle 1 is arranged in the safety protection part in a non-withdrawable way, and the needle destroy part 5 moves relative to the safety protection part so that the needle 1 enters the needle destroy part 5 to destroy the needle.
Specifically, the safety protection part is of a safety protection sleeve 7 structure, the safety protection sleeve 7 and the needle damage part 5 are connected through a sliding guide piece axially arranged along the safety protection sleeve 7 and the needle damage part 5, and a locking mechanism 8 is arranged at the end part of the connection part of the safety protection sleeve 7 and the needle damage part 5 and used for preventing the needle damage part 5 from moving randomly along the axial direction of the safety protection sleeve 7 under the condition of no external force. The safety shield 7 is further provided on its inner side wall with a stop element 9 limiting the travel of the needle-destroying portion 5 in the safety shield 7, when the needle-destroying portion 5 is moved via a sliding guide along its axis into the safety shield 7, causing the needle 1 placed in the safety shield 7 to penetrate into the needle-destroying portion 5 to be destroyed.
The safety protection sleeve 7 is a columnar body with an opening at one side. The safety shield 7 further comprises an elastically deformable locking element 10 and a longitudinal channel 11 extending through the safety shield 7. One end of the safety protection sleeve 7 is rotatably connected with the needle seat 2 through a hinge 12, the needle destroying portion 5 moves in a longitudinal channel 11 of the safety protection sleeve 7 through a sliding guide, a locking mechanism 8 is arranged at the end of the connecting part of the longitudinal channel 11 and the needle destroying portion 5, and a stop element 9 is arranged in the longitudinal channel 11. The locking element 10 is arranged at the end of the longitudinal channel 11 near the hinge 12, the locking element 10 being a back-off, a snap or a clip and being made of a rigid plastic or metal with elasticity.
The safety shield 7 is rotated such that the needle 1 is inserted into the longitudinal channel 11 beyond the elastically deformable locking element 10, the locking element 10 being arranged such that the needle 1 is forced into the longitudinal channel 11 of the safety shield 7 in a non-withdrawable manner after the locking element 10 has been restored.
Wherein the sliding guide is arranged between the locking mechanism 8 and the stop element 9 and comprises a guide part 13 and a sliding part 14. The guide member 13 and the sliding member 14 are disposed on the inner side wall of the safety shield 7 or the outer side wall of the needle destruction portion 5, respectively, with the guide member 13 including a guide rail or a guide groove, and the sliding member 14 including a protrusion or a rib corresponding to the guide member 13. When the needle-destroying portion 5 is pushed in the longitudinal direction by a certain amount of external force, the needle-destroying portion 5 can slide with respect to the safety shield 7. When the needle-breaking portion 5 slides along the guide member 13 to abut against the stopper element 9, the continued sliding movement of the needle-breaking portion 5 is prevented, and even if the pushing force is further increased, the needle-breaking portion 5 does not move in the direction indicated by the arrow P (see fig. 2).
As shown in fig. 3, the lock mechanism 8 includes a slider 15 and a lock stop, and the slider 15 is provided on the slide member 14 or is integrally formed with the slide member 14. The locking stop is provided at the end of the guide member 13 where the safety shield 7 is connected to the needle damaging portion 5. The locking stop comprises a first locking stop 16 and a second locking stop 17, the first locking stop 16 and the second locking stop 17 are sequentially arranged along the moving direction of the needle damage part 5 towards the safety protection sleeve 7, the structural strength of the first locking stop 16 is greater than that of the second locking stop 17, the first locking stop 16 is not deformed under the action of external force, and the second locking stop 17 is deformed under the action of external force. The slide 15 is arranged between a first locking stop 16 and a second locking stop 17. When the needle damage part 5 is under the action of external force, namely the sliding block 15 is under the action of external force and abuts against the second locking stop 17, and the second locking stop 17 is forced to deform, the sliding block 15 moves into the guide part 13 beyond the second locking stop 17 to drive the needle damage part 5 to move, and the existence of the first locking stop 16 can prevent the needle damage part 5 from falling out of the safety protection sleeve 7.
When a user or healthcare worker applies an external force in the direction indicated by arrow P (i.e., first direction P) with respect to safety shield 7 along longitudinal axis L (see fig. 2) by applying an external force to needle-destroying portion 5 that is greater than the locking force of locking mechanism 8 to lock needle-destroying portion 5 with safety shield 7, needle-destroying portion 5 slides in the direction indicated by arrow P with respect to safety shield 7 past second locking stop 17 of locking mechanism 8. Also, when an external force is applied in the second direction Q opposite to the direction indicated by the arrow P, the sliding movement of the needle-breaking portion 5 with respect to the safety sheath 7 is prevented, and even if the external force is further increased, the needle-breaking portion 5 does not slip in the second direction Q.
As shown in fig. 2, assuming that the distance between the stopper element 9 and the locking mechanism 8 is L1, the overall length of the needle damaging portion 5 is L2, and the specific dimensions of the safety shield 7 and the needle damaging portion 5 are: when the needle 1 is held in the longitudinal channel of the safety shield 7, the needle 1 occupies a part of 1/2 to 3/4 of the length between the locking mechanism 8 and the stop element 9, i.e. the part of the needle 1 placed between the stop element 9 and the locking mechanism 8 has a length of 0.5L1 to 0.75L1. In addition, L1 is set to be not more than L2, and is generally set to L2: l1=1.1 to 1.3. The arrangement is such that the tip of the needle 1 can be located near the middle of the space formed by the needle-destroying portion 5 when the needle-destroying portion 5 is pushed against the safety shield 7 by an external force to the bottommost end of the guide member 13.
In normal injection, infusion or blood drawing, the needle functionality is in a first position exposing the needle 1, as shown in fig. 2, and when injection, infusion or blood drawing is completed, the needle functionality is pivotable along the hinge 12 to a second position covering the needle 1. Wherein in the second position the needle 1 is received in the longitudinal channel 11 beyond the locking element 10 and is not withdrawn, preventing the risk of the user or medical staff being needled.
To destroy the needle 1 thoroughly to prevent a possible re-use of the needle 1, after the needle 1 has been locked by the locking element 10 in the space formed by the longitudinal channel 11, the user or medical staff can apply an amount of pushing force to the needle-destroying portion 5 in the direction of arrow P (see fig. 2) such that the needle-destroying portion 5 overcomes the locking force of the locking mechanism 8 under the effect of the pushing force and thus slides longitudinally with respect to the safety shield 7.
As shown in fig. 4 to 5, the needle destruction unit 5 includes a hard case 18 and a container case 19, and the container case 19 is provided inside the hard case 18 and closely contacts the inner wall of the hard case 18. The outer surface of the hard case 18 is formed with a sliding member 14 corresponding to the guide member 13 of the safety sheath 7. The rigid housing 18 has a protective layer 20 at one end where it joins the safety shield 7 and is easily pierced by a needle, while the other end is a thickening layer 21 of increased structural strength that further enhances the rigidity of the rigid housing 18 at that end so that it is still ensured that the rigid housing 18 is not easily deformed and damaged when an external force hits the thickening layer 21 (for example, when the syringe is used up and the needle function is used to enclose the needle 1 therein, a medical staff or user can hold the syringe body 4 with one hand and then force the end of the thickening layer 21 of the needle-destroying portion 5 from above down against a table or wall surface so that the needle-destroying portion 5 can slide along the guide member 13 relative to the safety shield 7 when overcoming the locking force of the locking mechanism 8). The protective layer 20 is used for providing a blocking protection for the possible accidental leakage of the liquid substance 6 in the container housing 19, so as to further prevent the possible leaked liquid substance 6 from polluting or burning the external environment or the human body (wherein the container housing 19 provides a first protection and the protective layer 20 provides a second protection), so specific materials used for manufacturing the protective layer 20 and the container housing 19 are corresponding materials capable of containing corrosive liquid or strong glue in the prior art, and are not described herein. Further, as shown in fig. 4, the thickening layer 21 and the hard shell 18 may be made of the same material as the container shell 19 on the side close to the container shell 19. Further, to prevent possible accidents or contamination, the volume of the space formed by the container housing 19 (or the volume of the corresponding contained liquid substance 6) is not more than 10ml, not more than 15ml, not more than 20ml, not more than 30ml, not more than 40ml or not more than 50ml.
The container housing 19 contains the liquid substance 6 which can destroy the needle head, so as to irreversibly corrode or block the needle tip of the needle head 1, thereby realizing permanent complete destruction of the needle head 1, truly preventing the needle head from being possibly reused and effectively reducing the risk of cross infection.
When the liquid substance 6 is a corrosive liquid, such as a strong acid, the corrosive liquid is able to chemically corrode the needle 1 when the needle tip 1 is in contact with the corrosive liquid, thereby thoroughly destroying the needle 1 to prevent the needle 1 from being possibly further used. When the liquid substance 6 is a strong glue, such as 502 glue, when the needle tip 1 is in contact with 502 glue, the glue can strongly seal the tip of the needle 1 and solidify rapidly, so that the needle 1 is physically unable to be used again as a conducting channel for liquid, and even if the needle 1 is withdrawn after the safety protection sleeve 7 is broken by a special tool, the needle 1 cannot be further reused because the needle hole of the needle tip 1 is blocked by the solidified strong glue.
In order to facilitate that the tip of the needle 1 easily pierces the end wall of the container housing 19 when the needle-destroying portion 5 moves in the first direction P with respect to the safety shield 7, as shown in fig. 4 to 5, the area near the center of the end wall of the container housing 19 is formed as a weakened area facilitating penetration of the needle 1, and further, the weakened area may also be formed as a stopper 22 sealingly engaging with the end wall of the container housing 19, and when the tip of the needle 1 abuts the stopper 22, the needle 1 may eject the stopper 22 into the space formed by the container housing 19 containing the liquid substance 6, at which time the tip of the needle 1 is immersed in the liquid substance 6 or surrounded by the liquid substance 6.
Fig. 6 shows a second embodiment of the needle function as a second embodiment of the present application. Unlike the first embodiment, the safety protection part of the needle function part forms a safety protection cap 23 structure, and when injection, transfusion or blood drawing is completed, the needle function part is covered on the needle seat 2 of the syringe body 4 to cover the needle 1, the needle destroy part 5 is pushed to slide relative to the safety protection cap 23 by force, and the needle 1 is penetrated into the needle destroy part 5 to be thoroughly corroded and destroyed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a medical needle with safety protection and self-destruction function, includes syringe needle and needle file, the syringe needle is fixed on the needle file, its characterized in that: the needle head functional piece comprises a safety protection part and a needle head destroy part, the safety protection part and the needle head destroy part are movably connected through a sliding guide piece arranged along the axial direction of the safety protection part and the needle head destroy part, the needle head destroy part contains a liquid substance which destroys the needle head, the liquid substance is corrosive liquid, the needle head is arranged in the safety protection part in a non-withdrawable mode, the needle head destroy part moves relative to the safety protection part to enable the needle head to enter the needle head destroy part, and the corrosive liquid chemically corrodes the needle head to thoroughly destroy the needle head.
2. The medical needle with safety protection and self-destruction functions according to claim 1, wherein: the safety protection part is of a safety protection sleeve structure or a safety protection cap structure, a locking mechanism is arranged at the end part of the joint of the safety protection part and the needle damage part and used for preventing the needle damage part from moving randomly along the axial direction of the safety protection part under the condition of no external force, a stop element for limiting the travel of the needle damage part in the safety protection part is further arranged on the inner side wall of the safety protection part, and when the needle damage part moves into the safety protection part along the axial direction of the needle damage part through the sliding guide piece, the needle arranged in the safety protection part is caused to penetrate into the needle damage part and be damaged.
3. A medical needle with safety protection and self-destruction function according to claim 2, characterized in that: the sliding guide piece comprises a guide part and a sliding part, and the guide part and the sliding part are arranged on the inner side wall of the safety protection part or the outer side wall of the needle damage part in an arbitrary matching way.
4. A medical needle with safety protection and self-destruction function according to claim 3, characterized in that: the guide member includes a guide rail or a guide groove, and the sliding member includes a protrusion or a rib corresponding to the guide member.
5. A medical needle with safety protection and self-destruction function according to claim 3, characterized in that: the locking mechanism comprises a sliding block and a locking stop, the sliding block is arranged on the sliding part or is integrally formed with the sliding part, the locking stop is arranged at the end part of the connecting part of the guide part, which is positioned between the safety protection part and the needle head damage part, the locking stop comprises a first locking stop and a second locking stop, the first locking stop and the second locking stop are sequentially arranged along the moving direction of the needle head damage part towards the safety protection part, the sliding block is arranged between the first locking stop and the second locking stop, the structural strength of the first locking stop is greater than that of the second locking stop, the first locking stop is not deformed under the action of external force, the second locking stop is deformed under the action of external force, when the needle head damage part is subjected to the action of external force, namely the sliding block is abutted to the second locking stop and forces the second locking stop to deform, the sliding block moves beyond the second locking stop into the guide part to drive the needle head damage part to move, and the first locking stop the needle head damage part from falling out of the safety protection part.
6. A medical needle with safety protection and self-destruction function according to claim 2, characterized in that: the distance between stop element and the locking mechanism is L1, the whole length of needle destroys the portion is L2, L2: l1=1.1 to 1.3, and the portion of the needle disposed between the stopper element and the locking mechanism has a length of 0.5L1 to 0.75L1.
7. The medical needle with safety protection and self-destruction functions according to claim 1, wherein: the needle destroy part comprises a hard shell and a container shell, wherein the container shell is arranged in the hard shell and is clung to the inner side wall of the hard shell, one end of the joint of the hard shell and the safety protection part is provided with a protective layer which is sealed and is easy to be pierced by a needle, the other end of the joint is a thickening layer for increasing the structural strength, a plug which is in sealing combination with the end wall of the container shell is formed at the end of the container shell, corresponding to the protective layer, of the hard shell, and corrosive liquid capable of destroying the needle is contained in the container shell.
8. A medical needle with safety protection and self-destruction function according to claim 2, characterized in that: when the safety protection part is of a safety protection sleeve structure, the safety protection sleeve is a columnar body with an opening at one side, the safety protection sleeve further comprises a locking element capable of elastic deformation and a longitudinal channel penetrating through the safety protection sleeve, one end of the safety protection sleeve is rotatably connected with the needle seat through a hinge, the needle damage part moves in the longitudinal channel of the safety protection sleeve through a sliding guide piece, the locking mechanism is arranged at the end part of the joint of the longitudinal channel and the needle damage part, the stop element is arranged in the longitudinal channel, the locking element is arranged at one end of the longitudinal channel close to the hinge, the safety protection sleeve rotates, the needle passes through the locking element capable of elastic deformation and is embedded in the longitudinal channel, and the needle is forced to be placed in the longitudinal channel of the safety protection sleeve in a non-withdrawable mode after the locking element is restored to the original state.
9. The medical needle with safety protection and self-destruction function according to claim 8, wherein: the locking element is a back-off, a buckle or a clip and is made of a rigid plastic or metal with elasticity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811287664.5A CN109260551B (en) | 2018-10-31 | 2018-10-31 | Medical needle with safety protection and self-destruction functions |
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| CN201811287664.5A CN109260551B (en) | 2018-10-31 | 2018-10-31 | Medical needle with safety protection and self-destruction functions |
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| CN109260551A CN109260551A (en) | 2019-01-25 |
| CN109260551B true CN109260551B (en) | 2024-01-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112957565A (en) * | 2021-02-11 | 2021-06-15 | 常州市武进人民医院 | Puncture-preventing needle head device |
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| CN109260551A (en) | 2019-01-25 |
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