CN117695482A - Rear end anti-needling insulin pen needle - Google Patents
Rear end anti-needling insulin pen needle Download PDFInfo
- Publication number
- CN117695482A CN117695482A CN202311523354.XA CN202311523354A CN117695482A CN 117695482 A CN117695482 A CN 117695482A CN 202311523354 A CN202311523354 A CN 202311523354A CN 117695482 A CN117695482 A CN 117695482A
- Authority
- CN
- China
- Prior art keywords
- needle
- elastic claw
- protection sleeve
- injection
- needling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229940127560 insulin pen Drugs 0.000 title claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 210000000078 claw Anatomy 0.000 claims abstract description 40
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 claims abstract description 22
- 102000004877 Insulin Human genes 0.000 claims abstract description 11
- 108090001061 Insulin Proteins 0.000 claims abstract description 11
- 229940125396 insulin Drugs 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 5
- 208000012266 Needlestick injury Diseases 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000001467 acupuncture Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 206010012601 diabetes mellitus Diseases 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to the field of medical equipment, in particular to a rear-end anti-needling insulin pen needle, which comprises: the tail end of the shell is connected with the insulin injection pen; the needle stand is fixed in the shell, the needle stand is provided with an injection needle extending to the tail end of the shell, the side wall of the needle stand is provided with a guide groove, and the inner surface of the side wall of the needle stand is also provided with a convex block; the rear needle protection sleeve is arranged in the needle seat in a penetrating way, a spring is clamped between the rear needle protection sleeve and the needle seat, and a positioning column and an elastic claw are arranged on the outer surface of the rear needle protection sleeve. When the injection pen is connected, the rear needle protective sleeve is compressed into the needle seat, the positioning column moves to a first position in the guide groove, and the elastic claw is positioned at one side of the convex block; when the injection pen is separated, the rear needle protecting sleeve pops out and covers the tail of the injection needle, the positioning column continues to move to the second position along the guide groove, and at the moment, the elastic claw passes over the lug and is limited by the lug, so that the rear needle protecting sleeve is locked.
Description
Technical Field
The invention relates to the field of medical appliances, in particular to a rear-end anti-needling insulin pen needle.
Background
Insulin injection is widely used as a method for treating diabetes, and the main function of the insulin injection is to accurately infuse insulin into a diabetic patient through an injection device so as to achieve the aim of controlling the blood sugar of the patient.
The traditional injection form is the syringe needle structure, and injection device includes needle file, needle tubing and outside protective housing, removes the protective housing before the use after, and insulin syringe needle directly exposes outside, because it does not have the safety protection structure after the use, the accidental mistake touches the syringe needle and leads to cross infection easily, has the risk of being used repeatedly in addition.
At present, an insulin pen needle is arranged at the head end of an injection pen in the market, the carrying and the use are convenient, and the front end protection design of a needle head is considered, but the protection of the rear end of the injection needle is mostly ignored in the product, the needle tail of the injection needle 21 can be exposed after the pen needle is separated from the injection pen, as shown in fig. 1, the needle penetration risk is also existed, and the improvement is needed.
Disclosure of Invention
Based on the above problems, the invention aims to provide an insulin pen needle with a rear end for preventing needling, which is used for protecting the exposed rear end of an injection needle and improving the use safety and convenience.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a rear end anti-needlestick insulin pen needle, comprising:
the tail end of the shell is connected with the insulin injection pen;
the needle stand is fixed in the shell, the needle stand is provided with an injection needle extending to the tail end of the shell, the side wall of the needle stand is provided with a guide groove, and the inner surface of the side wall of the needle stand is also provided with a convex block;
the rear needle protection sleeve is arranged in the needle seat in a penetrating way, a spring is clamped between the rear needle protection sleeve and the needle seat, and a positioning column and an elastic claw are arranged on the outer surface of the rear needle protection sleeve.
When the injection pen is connected, the rear needle protective sleeve is compressed into the needle seat, the positioning column moves to a first position in the guide groove, and the elastic claw is positioned at one side of the convex block;
when the injection pen is separated, the rear needle protecting sleeve pops out and covers the tail of the injection needle, the positioning column continues to move to the second position along the guide groove, and at the moment, the elastic claw passes over the lug and is limited by the lug, so that the rear needle protecting sleeve is locked.
Optionally, the guide groove comprises a first guide section extending from the middle part of the needle seat to the head end of the needle seat and a second guide section axially arranged along the needle seat, the first guide section is intersected with the second guide section, the first position is the end part of the second guide section, which is close to the head end of the needle seat, and the second position is the end part of the second guide section, which is close to the tail end of the needle seat.
Optionally, the size of the notch at the intersection of the first guide section and the second guide section is smaller than the size of the positioning column, and the positioning column passes through the notch by elastic deformation.
Optionally, an assembly guide groove extending from the tail end of the needle seat to the first guide section is arranged on the inner wall of the needle seat.
Optionally, the rear needle protection sleeve comprises a core column and an outer wall positioned outside the core column, the spring is arranged in a gap between the core column and the outer wall, and the positioning column and the elastic claw are respectively formed on the outer wall.
Optionally, two notch grooves distributed along the axial direction at intervals are formed in the outer wall, an elastic claw is formed by the two notch grooves, one end of the elastic claw is connected with the rear needle protection sleeve, and the other end of the elastic claw extends to the end face of the outer wall and protrudes out of the outer surface of the outer wall.
Optionally, the two positioning posts and the two elastic claws are distributed in a cross shape on the cross section of the rear needle protection sleeve.
Optionally, an avoidance port is formed on the needle seat corresponding to the movement track of the elastic claw in the connection process of the injection pen.
Optionally, one side edge of the lug is provided with a transition inclined plane which is convenient for the elastic claw to pass over, and the other side edge is provided with a limit step which can block the elastic claw from passing over.
Optionally, a rib is provided on the outer surface of the rear needle protective sleeve to reduce the clearance with the needle hub.
In summary, compared with the prior art, the rear-end anti-needling insulin pen needle has the beneficial effects that the rear-end needle protecting sleeve with telescopic action is designed for the condition that the rear end of the injection needle is exposed after the rear-end anti-needling insulin pen needle is used, and the rear-end needle protecting sleeve is triggered to pop out and form position locking according to the action of separating the connected injection pen, so that the rear-end needle protecting sleeve cannot retract again after covering the tail of the needle, the rear-end needle punching preventing aim is achieved, and the use safety is improved.
Drawings
FIG. 1 is a schematic view of an insulin pen needle with an exposed needle tail of an injection needle provided by an embodiment of the present invention;
FIG. 2 is an exploded view of the structure of a rear end anti-piercing insulin pen needle provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a structure of a hub in a rear end anti-piercing insulin pen needle according to an embodiment of the present invention;
fig. 4 is a schematic diagram II of the structure of the needle stand in the rear end anti-needling insulin pen needle provided by the embodiment of the invention;
fig. 5 is a schematic structural view of a rear needle protecting sleeve in a rear end anti-needling insulin pen needle according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a factory-leaving structure of a rear-end anti-needling insulin pen needle according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an injection structure of a rear end anti-piercing insulin pen needle according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a rear-end anti-piercing insulin pen needle post-withdrawal structure according to an embodiment of the present invention.
In the figure:
1. a housing;
2. a needle stand; 21. an injection needle; 22. a guide groove; 221. a first guide section; 222. a second guide section; 23. a bump; 231. a transition inclined plane; 232. a limit step; 24. assembling a guide groove; 25. an avoidance port;
3. a rear needle protective sleeve; 31. positioning columns; 32. an elastic claw; 33. a stem; 34. an outer wall; 35. a notch groove; 36. a rib;
4. and (3) a spring.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar parts throughout, or parts having like or similar functions. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, mechanically connected, electrically connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature. The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Referring to fig. 2 to 8, the preferred embodiment provides a rear end anti-piercing insulin pen needle, which comprises a housing 1, a needle stand 2 and a rear needle protecting sleeve 3.
Wherein the tail end of the shell 1 is connected with an insulin injection pen; the needle seat 2 is fixed in the shell 1, the needle seat 2 is provided with an injection needle 21 extending to the tail end of the shell 1, the side wall of the needle seat 2 is provided with a guide groove 22, and the inner surface of the side wall of the needle seat 2 is also provided with a convex block 23; the rear needle protection sleeve 3 is arranged in the needle seat 2 in a penetrating way, a spring 4 is clamped between the rear needle protection sleeve 3 and the needle seat 2, and a positioning column 31 and an elastic claw 32 are arranged on the outer surface of the rear needle protection sleeve 3.
When the injection pen is connected, the rear needle protecting sleeve 3 is pressed into the needle seat 2, the positioning column 31 moves to a first position in the guide groove 22, and the elastic claw 32 is positioned at one side of the convex block 23;
when the injection pen is separated, the rear needle protecting sleeve 3 ejects and covers the tail of the injection needle 21, the positioning column 31 continues to move to the second position along the guide groove 22, and at the moment, the elastic claw 32 passes over the bump 23 and is limited by the bump 23, so that the rear needle protecting sleeve 3 is locked.
In particular, the guide groove 22 includes a first guide section 221 extending from the middle of the needle holder 2 obliquely to the head end of the needle holder 2 and a second guide section 222 axially arranged along the needle holder 2, the first guide section 221 intersects with the second guide section 222, the first position is the end of the second guide section 222 near the head end of the needle holder 2, and the second position is the end of the second guide section 222 near the tail end of the needle holder 2.
It should be noted that, during the connection process of the injection pen, the positioning column 31 enters the first position of the second guiding section 222 from the first guiding section 221, and the rear needle protecting sleeve 3 has axial and rotational movement relative to the needle seat 2; during the separation of the injection pen, the positioning column 31 reaches the second position from the first position of the second guide section 222, and the rear needle protecting sleeve 3 moves only in the axial direction relative to the needle holder 2. In addition, the two ends of the second guiding section 222 do not penetrate through the end face of the needle seat 2, so that the positioning column 31 is prevented from being separated from the second guiding section 222, and the structural reliability is improved.
Further, the size of the notch at the intersection of the first guiding segment 221 and the second guiding segment 222 is smaller than the size of the positioning column 31, and the positioning column 31 is elastically deformed by the notch, so that the positioning column 31 can easily pass through the intersection in the process of the first guiding segment 221 to the second guiding segment 222, and the positioning column 31 is not easy to return to the first guiding segment 221 by mistake in the process of the first position to the second position.
Further, an assembly guiding groove 24 extending from the tail end of the needle holder 2 to the first guiding section 221 is provided on the inner wall of the needle holder 2, so that the positioning column 31 can reach the initial position in the first guiding section 221 when the assembly is carried out in factory.
In particular, the rear needle protection sleeve 3 here comprises a stem 33 and an outer wall 34 located outside the stem 33, the spring 4 being arranged in the gap between the stem 33 and the outer wall 34, the positioning stem 31 and the elastic claw 32 being formed on the outer wall 34, respectively.
Specifically, two notch grooves 35 are formed on the outer wall 34 along the axial direction at intervals, the two notch grooves 35 form an elastic claw 32, one end of the elastic claw 32 is connected with the rear needle protection sleeve 3, and the other end extends to the end face of the outer wall 34 and protrudes out of the outer surface of the outer wall 34.
In order to ensure that the rear needle protection sleeve 3 acts accurately relative to the needle seat 2, two positioning posts 31 and two elastic claws 32 are arranged on the rear needle protection sleeve 3, and the two positioning posts 31 and the two elastic claws 32 are distributed in a cross shape on the cross section of the rear needle protection sleeve 3.
In particular, the avoidance port 25 is formed on the needle seat 2 corresponding to the movement track of the elastic claw 32 in the process of connecting the injection pen, so that the rear needle protection sleeve 3 is ensured to rotate and move smoothly and the weight can be reduced.
Further, one side edge of the bump 23 is provided with a transition slope 231 facilitating the elastic claw 32 to pass over, and the other side edge is provided with a limit step 232 blocking the elastic claw 32 from passing over. During the separation of the injection pen, the rear needle protecting sleeve 3 only moves axially, namely the elastic claw 32 only moves from one axial side of the protruding block 23 to the other axial side, and the transition inclined surface 231 and the limiting step 232 can promote the elastic claw 32 to act accurately.
In addition, the outer surface of the rear needle protecting cover 3 is provided with a rib 36 for reducing the clearance matched with the needle seat 2.
In the initial state, the positioning column 31 is positioned in the first guiding section 221 of the guiding groove 22, see fig. 6 in detail.
In use, with the insulin injection pen connected to the end of the insulin pen needle, the rear needle protecting sleeve 3 is pushed against the spring force of the spring 4 and moves and rotates to the first position under the limit of the guide slot 22 on the positioning column 31, and the elastic claw 32 is located at one axial side of the protruding block 23, as shown in fig. 7.
After the injection is finished, the insulin injection pen is separated from the insulin pen needle, the rear needle protecting sleeve 3 is ejected under the action of the elasticity of the spring 4, the rear needle protecting sleeve 3 moves axially to the second position under the limit action of the guide groove 22 on the positioning column 31, at the moment, the elastic claw 32 passes over the convex block 23 to reach the other axial side of the convex block 23, and the axial displacement of the rear needle protecting sleeve 3 is limited, so that the rear needle protecting sleeve 3 keeps shielding the needle tail of the injection needle 21, and the aim of preventing needling is fulfilled, and the aim is shown in fig. 8 in detail.
To sum up, the rear end anti-needling insulin pen needle designs the rear needle protection sleeve 3 with telescopic action aiming at the condition that the rear end of the injection needle 21 is exposed after the use, triggers the rear needle protection sleeve 3 to pop out and form position locking according to the action of separating after the connection of the injection pen, ensures that the rear needle protection sleeve 3 cannot retract again after covering the tail of the needle, achieves the aim of rear end anti-needling, and improves the use safety.
The above embodiments merely illustrate the basic principles and features of the present invention, and the present invention is not limited to the above embodiments, but can be variously changed and modified without departing from the spirit and scope of the present invention, which is within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A rear end anti-needlestick insulin pen needle, comprising:
the insulin injection pen comprises a shell (1), wherein the tail end of the shell (1) is connected with the insulin injection pen;
the needle stand (2) is fixed in the shell (1), an injection needle (21) extending to the tail end of the shell (1) is arranged on the needle stand (2), a guide groove (22) is formed in the side wall of the needle stand (2), and a protruding block (23) is further arranged on the inner surface of the side wall of the needle stand (2);
the rear needle protection sleeve (3) is penetrated in the needle seat (2), a spring (4) is clamped between the rear needle protection sleeve (3) and the needle seat (2), a positioning column (31) and an elastic claw (32) are arranged on the outer surface of the rear needle protection sleeve (3),
when the injection pen is connected, the rear needle protection sleeve (3) is pressed into the needle seat (2), the positioning column (31) moves to a first position in the guide groove (22), and the elastic claw (32) is positioned at one side of the protruding block (23);
when the injection pen is separated, the rear needle protection sleeve (3) ejects and covers the tail part of the injection needle (21), the positioning column (31) continues to move to a second position along the guide groove (22), and at the moment, the elastic claw (32) passes over the protruding block (23) and is limited by the protruding block (23), so that the rear needle protection sleeve (3) is locked.
2. The rear end anti-needling insulin pen needle according to claim 1, characterized in that the guide groove (22) comprises a first guide section (221) extending from the middle part of the needle seat (2) to the head end of the needle seat (2) and a second guide section (222) axially arranged along the needle seat (2), the first guide section (221) is intersected with the second guide section (222), the first position is the end part of the second guide section (222) close to the head end of the needle seat (2), and the second position is the end part of the second guide section (222) close to the tail end of the needle seat (2).
3. The rear end needleless insulin pen needle as in claim 2, characterized in that the notch of the first guide section (221) where it meets the second guide section (222) has a smaller size than the positioning column (31) and the positioning column (31) is passed through by the notch being elastically deformed.
4. The rear end anti-acupuncture insulin pen needle according to claim 2, characterized in that an assembly guide groove (24) extending from the rear end of the needle holder (2) to the first guide section (221) is provided on the inner wall of the needle holder (2).
5. The rear end anti-needling insulin pen needle according to claim 1, characterized in that the rear needle protection sleeve (3) comprises a stem (33) and an outer wall (34) located outside the stem (33), the spring (4) is arranged in a gap between the stem (33) and the outer wall (34), and the positioning column (31) and the elastic claw (32) are respectively formed on the outer wall (34).
6. The rear-end needling-prevention insulin pen needle according to claim 5, characterized in that two notch grooves (35) distributed along the axial direction and at intervals are formed on the outer wall (34), the elastic claw (32) is formed by the two notch grooves (35), one end of the elastic claw (32) is connected with the rear needle protection sleeve (3), and the other end extends to the end face of the outer wall (34) and protrudes out of the outer surface of the outer wall (34).
7. The rear end anti-needling insulin pen needle according to claim 1, characterized in that two of the positioning posts (31) and two of the elastic claws (32) are distributed in a cross-section of the rear needle protection sleeve (3).
8. The rear end anti-needling insulin pen needle according to claim 1, characterized in that the needle holder (2) is provided with a avoiding opening (25) corresponding to the moving track of the elastic claw (32) in the connecting process of the injection pen.
9. The rear end anti-needling insulin pen needle according to claim 1, characterized in that one side edge of the bump (23) is provided with a transition slope (231) facilitating the elastic claw (32) to pass over, and the other side edge is provided with a limit step (232) blocking the elastic claw (32) from passing over.
10. The rear end anti-needling insulin pen needle according to claim 1, characterized in that a rib (36) for reducing the clearance matched with the needle seat (2) is arranged on the outer surface of the rear needle protecting sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311523354.XA CN117695482A (en) | 2023-11-14 | 2023-11-14 | Rear end anti-needling insulin pen needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311523354.XA CN117695482A (en) | 2023-11-14 | 2023-11-14 | Rear end anti-needling insulin pen needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117695482A true CN117695482A (en) | 2024-03-15 |
Family
ID=90159630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311523354.XA Pending CN117695482A (en) | 2023-11-14 | 2023-11-14 | Rear end anti-needling insulin pen needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117695482A (en) |
-
2023
- 2023-11-14 CN CN202311523354.XA patent/CN117695482A/en active Pending
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