CN111228615A - Prevent mistake and sting insulin pen needle - Google Patents

Prevent mistake and sting insulin pen needle Download PDF

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Publication number
CN111228615A
CN111228615A CN202010117586.5A CN202010117586A CN111228615A CN 111228615 A CN111228615 A CN 111228615A CN 202010117586 A CN202010117586 A CN 202010117586A CN 111228615 A CN111228615 A CN 111228615A
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CN
China
Prior art keywords
seat
needle
insulin pen
groove
trigger
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Granted
Application number
CN202010117586.5A
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Chinese (zh)
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CN111228615B (en
Inventor
胡超宇
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Pu'ang Hangzhou Medical Technology Co ltd
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Pu'ang Hangzhou Medical Technology Co ltd
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Priority to CN202010117586.5A priority Critical patent/CN111228615B/en
Publication of CN111228615A publication Critical patent/CN111228615A/en
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Publication of CN111228615B publication Critical patent/CN111228615B/en
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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
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • 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
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • 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
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3235—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Environmental & Geological Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses an insulin pen needle capable of preventing wrong insertion. According to the insulin pen needle capable of preventing accidental puncturing, the protective cover completely covers the front end of the needle body in the initial state and the state after triggering, so that the needle head is ensured not to be exposed in the initial state and the state after using triggering, and a user is prevented from being injured by mistake; moreover, the trigger seat is positioned in the shield, and the trigger structure is completely hidden in the shield, so that the protection structure of the insulin pen needle can be effectively prevented from being triggered due to mistaken touch of the trigger mechanism; the invisible triggering form is formed by combining the needle base, the triggering seat, the protective cover and the seat sleeve, and the invisible triggering device has the technical advantages of simple accessories, simple structure, ingenious design and good structural safety.

Description

Prevent mistake and sting insulin pen needle
Technical Field
The invention relates to the technical field of medical instruments, in particular to an insulin pen needle capable of preventing wrong insertion.
Background
An insulin pen needle is an insulin injection device which is used for being matched with an insulin pen type injector to inject insulin when being used for treating diabetes mellitus, and the insulin pen needle has the main function of accurately infusing the insulin into a diabetic patient through the injection device so as to achieve the purpose of controlling the blood sugar of the diabetic patient. Based on safety requirements, in order to prevent the exposed needle after injection from accidentally injuring a user, the existing insulin pen needle is usually provided with a safety protection structure to prevent the exposed needle after injection. In the prior art, the safety protection structures are various, and the advantages and the disadvantages of various safety protection structures are different.
The prior insulin pen needle generally has the following defects:
(1) the needle point protective structure only protects the needle point after being triggered, and in an initial state, the needle point is exposed, so that the risk of accidentally stabbing a user exists before the needle point protective structure is used;
(2) the trigger mechanism for triggering the protective cover is usually exposed, so that when external force is applied, the phenomenon of false triggering is easily caused, and once the false triggering is caused, the waste of the insulin pen needle is inevitably caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing an insulin pen needle capable of preventing mistaken puncturing so as to overcome the technical defects of the insulin pen needle in the prior art.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an insulin pen needle for preventing wrong insertion at least comprises:
the needle seat comprises a front seat body and a rear seat body, a limiting step facing one side of the front seat body is formed between the front seat body and the rear seat body, and the rear seat body is provided with a connecting cavity;
the needle body axially penetrates through the needle seat, the tail end of the needle body is positioned in the connecting cavity, and the front end of the needle body extends out of the free end of the front seat body;
the seat sleeve is sleeved on the needle seat, one end of the seat sleeve is fixedly connected with the free end of the rear seat body, the other end of the seat sleeve is open, and a first cavity is arranged between the inner wall of the seat sleeve and the outer wall of the needle seat;
the needle body extending out of the front seat body is completely covered by the protective cover in a protective state, a second cavity is arranged in the protective cover, a contact end is arranged at the front end of the protective cover, a needle passing hole for accommodating the needle body to pass through is formed in the contact end, at least one group of axial guide mechanisms are arranged between the protective cover and the inner wall of the seat sleeve, and at least one group of axial separation prevention mechanisms are arranged between the tail end of the protective cover and the free end of the seat sleeve;
the trigger seat is arranged in the second cavity and can at least do circumferential rotary motion relative to the protective cover in the second cavity, the protective cover and the trigger seat can do axial motion relative to the needle seat in the first cavity, and at least one group of circumferential rotary guide mechanisms and at least one group of axial anti-recovery mechanisms are arranged between the trigger seat and the needle seat or the seat sleeve;
the elastic piece is arranged between the needle seat and the trigger seat along the axial direction.
In a preferred embodiment, the axial guiding mechanism comprises at least a guiding groove and a guiding block matched with the guiding groove, the guiding groove is axially arranged on the inner wall of the seat sleeve, and the guiding block is radially convexly arranged on the outer wall of the protective cover.
In a preferred embodiment, the guide groove is provided with a rib at the front end of the seat cover, the guide block is provided with an abutting surface at the position facing the front end of the shield, and the rib and the abutting surface form the axial separation-preventing mechanism.
In a preferred embodiment, the guide block is provided at the trailing end of the shield.
In a preferred embodiment, the circumferential rotation guide mechanism includes at least:
the guide projection is arranged on the front seat body in a protruding mode along the radial direction, at least one side of the guide projection is provided with a first guide surface, and the first guide surface extends from one end close to the front seat body to one end of the rear seat body along the circumferential direction and the axial direction synchronously;
the guide arm is arranged at the rear end of the trigger seat in a protruding mode along the axial direction, and at least one side of the guide arm is provided with a second guide face matched with the first guide face.
In a preferred embodiment, the guide projection is provided on both sides with first guide surfaces that are symmetrical to each other, and the guide arm is provided on both sides with second guide surfaces that are symmetrical to each other and that are adapted to the first guide surfaces.
In a preferred embodiment, the rear end of the trigger seat is further protruded from at least one elastic arm, and the free end of the elastic arm is provided with an elastic protrusion protruding from the elastic arm in the radial direction.
In a preferred embodiment, a first limiting groove for accommodating the elastic lug is arranged on the inner wall of the seat cover close to the front end, a second limiting groove for accommodating the elastic lug is arranged on at least one side of the initial limiting groove, and the position of the second limiting groove relative to the first limiting groove is matched with the position of the trigger seat after rotating relative to the seat cover; first spacing groove is equipped with first tank bottom flange, the second spacing groove is equipped with second tank bottom flange, wherein, the relative second tank bottom flange of first tank bottom flange is closer to the front end of seat cover, keeps away from one side of first spacing groove and second spacing groove is provided with the third spacing groove that is used for holding elastic projection along circumferencial direction and axial synchronous motion.
In a preferred embodiment, a first guide surface is arranged on one side of the second groove bottom baffle facing the third limiting groove, a second guide surface matched with the first guide surface is arranged on one side of the elastic lug facing the front end of the trigger seat, and the elastic lug and the second limiting groove form the axial anti-recovery mechanism.
According to a preferred embodiment, a clamping mechanism is arranged between the needle base and the seat sleeve and comprises a clamping piece arranged on the needle base and a clamping groove arranged on the inner side of the seat sleeve and matched with the clamping piece.
Compared with the prior art, the insulin pen needle preventing mistaken puncturing has the following technical advantages:
(1) in the embodiment, the shield completely covers the front end of the needle body in the initial state and the triggered state, so that the needle head is not exposed in the initial state and the triggered state, and the user is prevented from being accidentally punctured.
(2) The trigger seat is positioned inside the protective cover, and the trigger structure is completely hidden inside, so that the protection structure of the insulin pen needle can be effectively prevented from triggering due to mistaken touch of the trigger mechanism.
(3) The invisible triggering form is formed by combining the needle base, the triggering seat, the protective cover and the seat sleeve, and the invisible triggering device has the technical advantages of simple accessories, simple structure, ingenious design and good structural safety.
Drawings
Fig. 1 is a schematic structural diagram of an explosion state of an insulin pen needle for preventing accidental stick in accordance with the first embodiment;
FIG. 2 is a schematic sectional view of an insulin pen needle with an erroneous insertion prevention according to the first embodiment;
FIG. 3 is a structural diagram illustrating a first state of the needle holder according to the first embodiment;
FIG. 4 is a structural diagram of a needle holder in a second state according to the first embodiment;
FIG. 5 is a schematic structural view of a seat cover in a first state according to an embodiment;
FIG. 6 is a structural diagram of a seat cover in a second state according to the first embodiment;
FIG. 7 is a cross-sectional structural view of a seat cover according to an embodiment;
FIG. 8 is a structural view of a third state of the seat cover according to the first embodiment;
FIG. 9 is a structural diagram of a shield in a first state according to the first embodiment;
FIG. 10 is a structural diagram of a shield in a second state according to the first embodiment;
FIG. 11 is a structural diagram illustrating a first state of the trigger seat according to the first embodiment;
FIG. 12 is a structural diagram illustrating a second state of the trigger seat according to the first embodiment;
FIG. 13 is a schematic structural diagram of a housing according to an embodiment;
FIG. 14 is a schematic view of the positional relationship between the needle hub, the trigger hub and the shield in the initial state;
FIG. 15 is a schematic view of the positional relationship between the needle hub, trigger hub and shield in a first compressed state in which the first guide surface and second guide surface are initially in contact;
FIG. 16 is a schematic view of the positional relationship of the needle hub, the trigger hub and the shield in a second compressed state in which the trigger hub has rotated a certain angle due to the interaction of the first and second guide surfaces;
FIG. 17 is a schematic view of the position relationship between the needle holder and the trigger holder in the state shown in FIG. 16;
FIG. 18 is a schematic view of the relationship between the needle hub, the trigger hub and the shield in a third compressed state, i.e., the injection state;
FIG. 19 is a schematic view of the position relationship between the needle holder and the trigger holder in the state shown in FIG. 18;
FIG. 20 is a schematic view of the relationship of the needle hub, the trigger hub and the shield after triggering;
FIG. 21 is a schematic view of the second embodiment showing the position relationship between the needle holder and the trigger holder in the initial state;
fig. 22 is a schematic structural view of a seat cover in the second embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
As shown in fig. 1 and fig. 2, the insulin pen needle for preventing wrong insertion of the present embodiment includes a needle holder 10, a seat cover 20, a needle body 70, a shield 30, a trigger seat 40, a housing 50 and an elastic member 60. In this embodiment, the end that contacts the patient is defined as the front end, and the end near the insulin pen-type injector is defined as the rear end.
The structure of the needle seat 10 is as shown in fig. 2 and fig. 3, and includes a front seat body 11 and a rear seat body 12, and a limit step 15 facing one side of the front seat body is formed between the front seat body and the rear seat body. Wherein, the rear seat body is provided with a connecting cavity 16, and an internal thread 17 is arranged in the connecting cavity and is used for being connected with an insulin pen-type injector.
In this embodiment, the needle body 70 is axially disposed through the needle holder 10, the rear end of the needle body 70 is located in the connecting cavity 16, and the front end of the needle body 70 extends out from the free end of the front holder body.
In this embodiment, the front seat 11 is provided with a pair of guiding protrusions 14 protruding from the front seat in the radial direction, and the pair of guiding protrusions 14 are uniformly distributed in the circumferential direction. One side of the guide protrusion 14 is provided with a first guide surface 141, and the first guide surface 141 extends from an end close to the front housing to an end of the rear housing in a circumferential direction and an axial direction in synchronization.
In this embodiment, the rear end of the rear seat 12 is provided with a ring 18, and a pair of fasteners 19 are uniformly distributed on the periphery of the ring 18 along the circumferential direction. Preferably, the latching piece 19 includes a first latching piece 192 extending in the axial direction and a pair of second latching pieces 191 symmetrically arranged at both sides of the first latching piece.
The seat cover 20 of the present embodiment is sleeved on the needle seat 10. The front end of the seat cover 20 is open, and the rear end is fixedly connected with the free end of the rear seat body. A preferred connection mode is shown in fig. 5 and 7, wherein the inner wall of the rear end of the seat cover 20 is provided with a clamping groove 26 which is matched and connected with the clamping piece 19. Preferably, the locking groove 26 includes a first locking groove 262 extending axially and adapted to the first locking member, and a second locking groove 261 symmetrically disposed on two sides of the first locking groove 262 and adapted to the second locking member. This connected mode does because the seat cover is plastic material usually, has certain deformability, uses certain pressure for the tail end of seat cover produces certain deformation, can make the fastener get into in the draw-in groove. The first clamping piece and the first clamping groove are matched to limit relative rotation in the circumferential direction, and the second clamping piece and the second clamping groove are matched to limit relative displacement in the axial direction. The device has the technical advantages of simple structure, convenience in installation and good structural stability.
As shown in fig. 2, after the hub 20 of the present embodiment is connected with the needle hub 10, a first cavity 80 is formed between the inner wall of the hub and the outer wall of the needle hub, wherein the shield 30 and the trigger block 40 can move in the first cavity 80.
As shown in fig. 5 to 7, in the seat cover 20 of the present embodiment, a pair of first limiting grooves 21 are uniformly formed in the inner wall of the seat cover near the front end along the circumferential direction, and a second limiting groove 23 is formed in one side of the first limiting groove 21. Wherein, first spacing groove is equipped with first tank bottom flange 211, and the second spacing groove is equipped with second tank bottom flange 25 to first tank bottom flange is closer to the front end of seat cover relative to second tank bottom flange, keeps away from one side of first spacing groove and second spacing groove is provided with third spacing groove 22.
As shown in fig. 8, the inner wall of the seat cover 20 of the present embodiment is further provided with a pair of guide grooves 29 uniformly distributed along the circumferential direction, and the guide grooves 29 extend along the axial direction. A rib 291 is provided near the front end of the guide groove 29.
In this embodiment, the protective cover 30 can completely cover the needle extending out of the front seat body in the protection state. The protection state comprises two states, namely an initial state before use and a state after use triggering.
As shown in fig. 9 and 10, the shield 30 of the present embodiment has a second cavity 35 for accommodating the trigger seat therein, the front end of the shield 30 is provided with a contact end 31 for contacting with the patient, and the contact end 31 is provided with a needle passing hole 32 for accommodating the needle body.
Wherein, the tail end of the guard shield 30 is uniformly provided with a pair of guide blocks 33 matched with the guide grooves 29 along the circumferential direction, and the guide blocks 33 are arranged on the outer wall of the guard shield in a protruding way along the radial direction. In this embodiment, the cooperation of the guide slot 29 and the guide block 33 forms an axial guide mechanism, so that the shield can only move axially relative to the sleeve.
Wherein, the guide block is provided with an abutting surface 34 facing the front end of the shield, and the abutting surface 34 is matched with the inner side of the retaining edge 291 to form an axial anti-disengaging mechanism. The engagement of the abutment surface 34 with the rib 291 prevents axial disengagement of the shield from the seat cover, both in the initial condition shown in fig. 2 and in the post-use activated condition.
As shown in FIG. 2, the trigger block 40 of this embodiment is located within the second cavity 35 and moves at least circumferentially and axially relative to the shroud within the second cavity.
As shown in fig. 11 and 12, the trigger base 40 of the present embodiment is provided with a spring chamber 45 inside, and the bottom of the spring chamber is provided with a baffle 46 distributed annularly, and the baffle 46 has an opening for receiving the needle body. Wherein the elastic element 60 is arranged between the needle seat and the trigger seat along the axial direction. Preferably, the elastic member 60 in the present embodiment is a spring. The trigger block 40 is held within the second chamber 35 by the spring and the stop plate 46 is held in contact with the bottom 36 of the second chamber 35.
In this embodiment, as shown in fig. 11 and 12, a pair of guide arms 43 is provided to protrude from the rear end of the trigger holder 40 in the axial direction, and the pair of guide arms 43 are uniformly distributed in the circumferential direction. Wherein one side of the guide arm is provided with a second guide surface 44 adapted to said first guide surface. Wherein the cooperation of the second guiding surface on the guiding arm and the first guiding surface on the guiding projection forms the circumferential rotation guiding mechanism of the present embodiment for guiding the rotation of the trigger holder relative to the needle holder.
It should be noted that, in this embodiment, the circumferential rotation guide mechanism is disposed between the needle holder and the trigger holder, and as an equivalent embodiment, the circumferential rotation guide mechanism may also be disposed between the seat cover and the trigger holder.
In this embodiment, the rear end of the trigger seat is further provided with a pair of elastic arms 41 protruding in the axial direction, and the pair of elastic arms are uniformly distributed in the circumferential direction. The free end of the elastic arm 41 is provided with an elastic projection 42 protruding from the elastic arm in the radial direction.
Wherein, in the initial state, the elastic lug 42 is located in the first limiting groove 22, in the process of compressing the shield, the elastic lug 42 enters the third limiting groove 22 from the first limiting groove 22, and under the guiding action of the circumferential rotation guiding mechanism, the elastic lug 42 rotates in the third limiting groove to the rear of the second limiting groove. When the injection is completed, the resilient projection 42 rides over the second groove bottom rib 25 into the second retaining groove under the potential energy of the spring. Preferably, in order to facilitate the elastic projection 42 to smoothly cross the second groove bottom rib 25, a side of the elastic projection facing the front end of the trigger seat is provided with a second guide surface 251 adapted to the first guide surface. In this state, when the shield is compressed again, the front end surface 422 of the elastic lug interacts with the groove bottom 252 of the second groove bottom flange 25, and the elastic lug 42 is difficult to cross the second groove bottom flange 25 again and enter the third limiting groove under the action of non-destructive force, so that an axial anti-recovery mechanism is formed, the needle body is prevented from being exposed outside the shield again, and the safety protection effect is reliable.
As shown in fig. 13, the housing 50 of the present embodiment has a housing cavity 51 for covering the seat cover and the outside of the hood in the unused state and the triggered state of use. Wherein, the outer side of the outer end of the outer shell 50 is provided with an annular convex edge 53, and the inner side is uniformly provided with a plurality of guide clamping grooves 52 along the circumferential direction. And accordingly. The outer side of the rear end of the seat cover 20 is provided with an annular rib 27, and one side of the annular rib facing the front end of the seat cover is provided with a plurality of guide clamping pieces 28 matched with the guide clamping grooves 52. It should be noted that, in which the number of guide notches 52 is greater than the number of guide catches 28, there is an advantage in that the alignment is not intentionally performed, and the ease of operation is greater.
Fig. 14-20 are schematic diagrams illustrating the state change of the anti-accidental-insulin pen needle from the initial state to the triggered state after use in the present embodiment. Wherein in the state shown in fig. 14, in an initial state, the shield completely covers the needle under the influence of the spring.
When it is desired to inject insulin into a patient, the contact end of the shield is pressed against the patient's skin and pressure is applied to one side of the patient. During this process, the spring is compressed and the needle is gradually exposed out of the shield and into the patient's skin, as shown in fig. 15. In the state shown in fig. 15, the first guide surface comes into contact with the second guide surface.
After the first guide surface and the second guide surface start to contact, the trigger seat rotates relative to the needle seat under the interaction of the first guide surface and the second guide surface when the pressing is continued, and the rotated state is shown in fig. 16 and 17.
Then, the syringe is further pressed to the state shown in fig. 18 and 19, which is the injection state, and the end of the guide arm is in contact with the stopper step. When the injection is completed, the needle is pulled out of the patient's skin and the trigger housing and shield are moved axially under the potential energy of the spring to the condition shown in fig. 20. In this state, the shield completely covers the needle body, and the needle body cannot be exposed from the shield under the action of the recovery prevention mechanism.
Example two
This embodiment is the same as the first embodiment in principle, except that, as shown in fig. 21, a pair of first guide surfaces 141 symmetrical to each other are provided on both sides of the guide projection 14, and correspondingly, second guide surfaces 44 matching the first guide surfaces are provided on both sides of the guide arm 43 symmetrical to each other. The structure has the advantages that the rotation direction of the trigger seat is not unique, and the trigger seat can rotate relative to the needle seat along the clockwise direction and the anticlockwise direction.
As shown in fig. 22, in order to realize the bidirectional rotation of the trigger seat, a pair of symmetrical second limiting grooves 23 are correspondingly formed on both sides of the first limiting groove 21.
In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a prevent mistake and sting insulin pen needle which characterized in that includes at least:
the needle seat (10) comprises a front seat body (11) and a rear seat body (12), a limiting step (15) facing one side of the front seat body is formed between the front seat body and the rear seat body, and the rear seat body is provided with a connecting cavity (16);
the needle body (70) axially penetrates through the needle seat, the tail end of the needle body is positioned in the connecting cavity, and the front end of the needle body extends out of the free end of the front seat body;
the seat sleeve (20) is sleeved on the needle seat, one end of the seat sleeve is fixedly connected with the free end of the rear seat body, the other end of the seat sleeve is open, and a first cavity (80) is arranged between the inner wall of the seat sleeve and the outer wall of the needle seat;
the needle protection device comprises a protective cover (30), wherein the protective cover completely covers the needle body extending out of a front seat body in a protection state, a second cavity (35) is arranged in the protective cover, a contact end (31) is arranged at the front end of the protective cover, a needle passing hole (32) for accommodating the needle body to pass through is formed in the contact end, at least one group of axial guide mechanisms are arranged between the protective cover and the inner wall of a seat sleeve, the protective cover can axially move along the axial guide mechanisms in a first cavity, and at least one group of axial separation prevention mechanisms are arranged between the tail end of the protective cover and the free end of the seat sleeve;
the trigger seat (40) is arranged in the second cavity and can at least do circumferential rotary motion relative to the shield in the second cavity, the trigger seat can axially move along with the shield in the first cavity, and at least one group of circumferential rotary guide mechanisms and at least one group of axial anti-recovery mechanisms are arranged between the trigger seat and the needle seat or the seat sleeve;
and the elastic piece (60) is arranged between the needle seat and the trigger seat along the axial direction.
2. An insulin pen needle for preventing wrong insertion according to claim 1, characterized in that the axial guiding mechanism comprises at least a guiding groove (29) and a guiding block (33) matched with the guiding groove, the guiding groove is axially arranged on the inner wall of the seat sleeve, and the guiding block is radially arranged on the outer wall of the protective cover in a protruding way.
3. An insulin pen needle against mis-puncture according to claim 2, wherein the guiding groove is provided with a rib (291) at the front end of the seat cover, the guiding block is provided with an abutting surface (34) at the position facing the front end of the shield, and the rib and the abutting surface form the axial disengagement preventing mechanism.
4. The insulin pen needle for preventing wrong insertion according to claim 1, characterized in that said circumferential rotation guiding mechanism comprises at least:
the guide lug (14) is arranged on the front seat body in a protruding mode along the radial direction, at least one side of the guide lug is provided with a first guide surface (141), and the first guide surface extends from one end close to the front seat body to one end of the rear seat body along the circumferential direction and the axial direction synchronously;
and the guide arm (43) is arranged at the rear end of the trigger seat in a protruding mode along the axial direction, and at least one side of the guide arm is provided with a second guide surface (44) matched with the first guide surface.
5. An insulin pen needle for preventing wrong insertion according to claim 4, characterized in that two sides of said guiding projection are provided with first guiding surfaces which are symmetrical with each other, and two sides of said guiding arm are provided with second guiding surfaces which are symmetrical with each other and are matched with said first guiding surfaces.
6. An insulin pen needle for preventing wrong insertion according to any one of claims 1 to 5, characterized in that the rear end of the trigger seat is further provided with at least one elastic arm (41) in a protruding manner, and the free end of the elastic arm is provided with an elastic lug (42) protruding from the elastic arm in a radial direction.
7. An insulin pen needle for preventing wrong insertion according to claim 6, characterized in that the inner wall of the seat sleeve is provided with a first limiting groove (21) near the front end for accommodating the elastic lug, at least one side of the initial limiting groove is provided with a second limiting groove (23) for accommodating the elastic lug, and the position of the second limiting groove relative to the first limiting groove is adapted to the position of the trigger seat after rotating relative to the seat sleeve; first spacing groove is equipped with first tank bottom flange (211), the second spacing groove is equipped with second tank bottom flange (25), wherein, the relative second tank bottom flange of first tank bottom flange is closer to the front end of seat cover, keeps away from one side of first spacing groove and second spacing groove is provided with third spacing groove (22) that are used for holding elastic projection along circumferencial direction and axial synchronous motion.
8. An insulin pen needle for preventing wrong insertion according to claim 7, characterized in that the side of the baffle of the second groove bottom facing the third limit groove is provided with a first guide surface (251), the side of the elastic lug facing the front end of the trigger seat is provided with a second guide surface (421) matched with the first guide surface, and the elastic lug and the second limit groove form the axial anti-recovery mechanism.
9. An insulin pen needle for preventing wrong insertion according to any one of claims 1 to 5 or 7 to 9, wherein a clamping mechanism is arranged between the needle base and the seat sleeve, and the clamping mechanism comprises a clamping piece (19) arranged on the needle base and a clamping groove (26) arranged on the inner side of the seat sleeve and matched with the clamping piece.
10. An anti-misintegration insulin pen needle as claimed in any of claims 1-5 or 7-9 further comprising a housing (50) for covering outside the hub and the shield.
CN202010117586.5A 2020-02-25 2020-02-25 Insulin pen needle capable of preventing false puncture Active CN111228615B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111658896A (en) * 2020-06-18 2020-09-15 普昂(杭州)医疗科技有限公司 Automatic trigger type needle head protection device and insulin pen needle

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WO2015045747A1 (en) * 2013-09-26 2015-04-02 テルモ株式会社 Liquid administration tool
CN110141733A (en) * 2019-05-10 2019-08-20 山东连发医用塑胶制品有限公司 A kind of safe injection of insulin syringe needle
WO2020001656A1 (en) * 2018-06-29 2020-01-02 苏州沙力医疗器械有限公司 Rotary locking-type safe insulin injection needle

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Publication number Priority date Publication date Assignee Title
WO2015045747A1 (en) * 2013-09-26 2015-04-02 テルモ株式会社 Liquid administration tool
WO2020001656A1 (en) * 2018-06-29 2020-01-02 苏州沙力医疗器械有限公司 Rotary locking-type safe insulin injection needle
CN110141733A (en) * 2019-05-10 2019-08-20 山东连发医用塑胶制品有限公司 A kind of safe injection of insulin syringe needle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111658896A (en) * 2020-06-18 2020-09-15 普昂(杭州)医疗科技有限公司 Automatic trigger type needle head protection device and insulin pen needle
WO2021254050A1 (en) * 2020-06-18 2021-12-23 普昂(杭州)医疗科技股份有限公司 Automatically triggered needle protection device and insulin pen needle
EP4140522A4 (en) * 2020-06-18 2023-10-04 Promisemed Hangzhou Meditech Co., Ltd. Automatically triggered needle protection device and insulin pen needle

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