CN215134996U - Self-destruction type safe insulin pen matched needle - Google Patents

Abstract

The utility model discloses a self-destruction formula safety insulin pen is supporting with needle, including: the shell component comprises a needle seat and a shell which are buckled and connected; the needle tube is fixedly arranged on the needle seat, and the front end of the needle tube extends out of the shell component; the sliding block is movably arranged in the shell component; the protective sleeve is movably arranged on the shell component and sleeved outside the needle tube; the elastic piece drives the protective sleeve to extend out of the shell assembly; be provided with one-way limit structure between slider and the casing subassembly, be equipped with lock joint structure between slider and the protective sheath, the anticreep cooperation between protective sheath and the casing subassembly. The utility model has the advantages of it is following and effect: the new mechanical structure of this scheme utilization has the effect that the structure is simpler, the equipment is convenient, the finished product qualification rate is higher during the equipment, has higher security during the use.

Description

Self-destruction type safe insulin pen matched needle

Technical Field

The utility model relates to the technical field of medical equipment, in particular to needle is used in cooperation of self-destruction formula safety insulin pen.

Background

Insulin injection devices such as insulin pens and injection needles have been widely used as a method for treating diabetes, and their main function is to precisely inject insulin into the body of a diabetic patient through the injection device to achieve the purpose of controlling the blood sugar of the patient.

The traditional ordinary syringe needle includes the protective housing of needle file, needle tubing and outside, removes the protective housing before the use after, and insulin syringe needle directly exposes in the outside, because of there is not safety protection structure after the use to the accident mistake that takes place easily touches the syringe needle and leads to cross infection. At the same time, due to the unnecessary protective structure, the injection needle can be reused after being used, so that the injection needle has extremely high infection risk.

In view of this, the chinese patent application No. 201980002224.7 discloses a safety injection device, which includes a needle tube, a needle base, an elastic member, a slider, a needle tip sleeve, a protective sleeve and an outer cover, wherein the needle base, the elastic member, the slider, the needle tip sleeve and the protective sleeve are sequentially sleeved with the needle tube as a shaft; the slider is configured to irreversibly rotate after one use. This injection device has avoided producing the fear to the needle point when the injection in the use, through eccentric principle after using up, block the stroke of pushing down, can't push down completely once more, the needle point can not expose again this moment to more effectually avoided the unexpected mistake after the use to touch the risk that the needle point takes place cross infection, and this structure makes difficult getting back to former position of waiting to use again after using, thereby make the syringe needle safe and can not the secondary use more after using, cross infection has effectively been avoided.

However, the safety injection device has a complex structure, and during assembly, each part needs to be positioned on the tool first and then assembled, which may result in scrapping of product assembly if the part is not well positioned. Therefore, the assembly difficulty is high, and the qualified rate of finished products is low.

There is a need for improvements in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a self-destruction formula safety insulin pen is supporting with needle has simple structure, equipment convenience, the effect that the finished product qualification rate is high.

The above technical purpose of the present invention can be achieved by the following technical solutions: a self-destruction type safe insulin pen matched needle comprises:

the shell component comprises a needle seat and a shell which are buckled and connected;

the needle tube is fixedly arranged on the needle seat, and the front end of the needle tube extends out of the shell component;

the sliding block is movably arranged in the shell component;

the protective sleeve is movably arranged on the shell component and sleeved outside the needle tube; and

the elastic piece drives the protective sleeve to extend out of the shell assembly;

a one-way limiting structure is arranged between the sliding block and the shell assembly, a fastening structure is arranged between the sliding block and the protective sleeve, and the protective sleeve is in anti-falling fit with the shell assembly;

one end of the slide block is fixed on the shell component in an unfired state; after the percussion is finished, the sliding block is separated from the needle seat and is abutted and limited with the shell assembly.

Through adopting above-mentioned technical scheme, during the installation, install the needle tubing on the needle file earlier, then put into the needle file with the elastic component, insert the bottom of slider in the needle file and form one-way spacing cooperation, again with protective sheath coaxial arrangement in the slider for the elastic component supports in the protective sheath, installs the shell lock joint on the needle file at last, makes the outer housing cover in slider and protective sheath, so, has the effect that the structure is simpler, the equipment is convenient, the finished product qualification rate is higher. During the use, support the front end of protective sheath in human injection position and push down with strength, make the protective sheath realize the percussion process to the shell internal motion, the relative protective sheath of needle tubing exposes can prick the skin and inject, the lock joint structure between slider and the protective sheath cooperatees this moment, the elastic component is in compression state, after the injection is accomplished (percussion completion back promptly), the human body is kept away from to the protective sheath front end, make the protective sheath outwards move under the elastic force effect of elastic component, the protective sheath encloses outside the needle tubing again, and under the effect of lock joint structure, drive the slider displacement when the protective sheath outwards moves, make the slider break away from the needle file, and the slider supports to keep off spacingly with casing subassembly along the axial through one-way limit structure. So, after the percussion is accomplished, the needle tubing is in the protected state, even the protective sheath is pushed down, because it is spacing to keep out along the axial between slider and the casing subassembly, the unable reverse retraction of slider is in the needle file to make the unable withdrawal of protective sheath, can prevent that the needle tubing point from exposing the protective sheath, have the higher effect of safety in utilization.

The utility model discloses a further set up to: the one-way limiting structure comprises a convex ring integrally formed on the needle base and an elastic flap integrally formed on the sliding block, the elastic flap is attached to and matched with the inner wall of the convex ring in an unfired state, after the firing is completed, the elastic flap is far away from the convex ring and outwards expands, and the elastic flap and the convex ring are axially abutted and limited.

Through adopting above-mentioned technical scheme, when being in the unfired state, the elasticity lamella is banded by the bulge loop and is restricted to contract in the bulge loop, and elasticity lamella self has an outside elasticity that expands all the time, after the percussion is accomplished, when the slider drives the elasticity lamella and breaks away from the bulge loop along axial motion, the elasticity lamella is outwards opened under the spring action of self, make the whole internal diameter that is greater than the bulge loop of external diameter of terminal surface under the slider, so, when the slider is by reverse backpressure, elasticity lamella tip part supports on the bulge loop terminal surface, and can't retract again in the bulge loop, can play the spacing effect of unidirectional motion.

The utility model discloses a further set up to: the elastic petals are arranged into four petals at equal intervals, and gaps are formed between the adjacent elastic petals.

The utility model discloses a further set up to: the protective sheath is located the tip outer wall integrated into one piece of shell and has the latch closure, and the latch closure cooperates with the shell anticreep.

Through adopting above-mentioned technical scheme, under the elastic action of elastic component, the latch closure offsets the cooperation with the shell, can play the spacing effect of anticreep to the protective sheath.

The utility model discloses a further set up to: the buckling structure comprises a plurality of buckling feet integrally formed on the sliding block, a first guide surface is arranged on the inner side of each buckling foot, a second guide surface is correspondingly arranged on the outer wall of the buckle, the first guide surface is in guide fit with the second guide surface, and the buckling feet are buckled with the buckle.

Through adopting above-mentioned technical scheme, when the protective sheath pressed in to the shell, under the guide effect of first spigot surface and second spigot surface for the latch closure direction slips in detaining the foot, when protective sheath reverse motion, can make the latch closure offset with detaining the foot, can play anticreep, the effect in conjuction between the two.

The utility model discloses a further set up to: the sliding block is provided with a limiting and resisting table board which is in limiting fit with the buckle, and a telescopic stroke for movement of the buckle is formed between the limiting and resisting table board and the buckle foot.

Through adopting above-mentioned technical scheme, when the protective sheath was impressed in the shell, the latch closure terminal surface offseted with spacing fender mesa, and spacing fender mesa can play spacing, the effect of keeping out to the latch closure.

The utility model discloses a further set up to: still integrated into one piece has the extension piece on the slider, and the through hole that supplies the extension piece to pass is seted up to the protective sheath, and the protective sheath sets up to transparent form.

Through adopting above-mentioned technical scheme, after the percussion is accomplished, because the needle file is kept away from to the slider under the effect of elastic component, extend the piece and correspondingly pass the through-hole and stretch into in the protective sheath, and extend the piece and correspond and stretch out the shell, user's accessible transparent protective sheath direct observation extends the piece to show the percussion completion state, can play better sign effect.

The utility model discloses a further set up to: the elastic piece sets up to expanding spring, and expanding spring's one end is supported in the needle file, and expanding spring's the other end supports in the protective sheath, and expanding spring orders about the protective sheath and has the motion trend of keeping away from the needle file all the time.

The utility model discloses a further set up to: the inner wall of the shell is provided with a buckling groove, the outer wall of the needle seat is correspondingly provided with a buckling ring, and the buckling ring is matched with the buckling groove in an embedding manner.

By adopting the technical scheme, when the shell is arranged on the needle seat, the shell can be fixed on the needle seat along the axial direction by buckling the buckling ring in the buckling groove.

The utility model discloses a further set up to: be provided with between shell and the needle file and spline the structure, spline the structure including the inserted block of locating the needle file outer wall, locate a plurality of commentaries on classics pieces that splines of shell inner wall, adjacent form between the commentaries on classics piece and supply the inserted slot of inserted block, the needle file inner wall is provided with the installation screw thread.

Through adopting above-mentioned technical scheme, when needle file and shell lock, the inserted block can be pegged graft in the slot wantonly, and the installation is more quick, nimble, when passing through screw thread installation insulin pen on the needle file, can drive the needle file rotation through rotating the shell, and it is more convenient to install.

To sum up, the utility model discloses following beneficial effect has:

1. the needle seat, the needle tube, the elastic piece, the sliding block, the protective sleeve and the shell are sequentially and axially mounted, so that the needle seat has the effects of simple structure, convenience in assembly and high finished product qualification rate during mounting; the mode that the one-way limiting structure is arranged between the sliding block and the shell assembly is adopted, so that the used protective sleeve cannot retract and is sleeved outside the needle tube all the time, and the safety is high;

2. the one-way limiting structure is formed by arranging the elastic petals on the sliding block, when the sliding block is far away from the convex ring, the elastic petals are outwards expanded under the action of the elasticity of the elastic petals, and when the sliding block is reversely pressed back, the end parts of the elastic petals are abutted against the end surface of the convex ring and cannot be retracted into the convex ring again, so that the one-way motion limiting effect can be achieved;

3. adopt the mode of integrated into one piece extension piece on the slider, stretch into in transparent protective sheath after the use, user's accessible transparent protective sheath direct observation extends the piece to show the completion state of percussion, can play better sign effect.

Drawings

Fig. 1 is a schematic diagram of the overall structural relationship of the embodiment.

Fig. 2 is an exploded view of the embodiment.

Fig. 3 is an exploded view of a portion of the structure from another perspective of the embodiment.

Fig. 4 is a schematic structural relationship diagram of the embodiment without the protective housing installed.

FIG. 5 is a cross-sectional view of a cocked state of the embodiment.

FIG. 6 is a cross-sectional view of a fired state of the embodiment.

FIG. 7 is a cross-sectional view of a post-firing state of the embodiments.

Fig. 8 is a cross-sectional view of the embodiment in a safe, needlestick-proof state.

In the figure: 1. a needle seat; 11. buckling rings; 12. installing a sleeve; 121. mounting holes; 13. a convex ring; 14. inserting a block; 15. installing threads; 2. a needle tube; 3. a slider; 31. a resilient flap; 32. a notch; 33. buckling legs; 331. a first guide surface; 34. a limiting resisting table surface; 35. an extension block; 4. a protective sleeve; 41. looping; 411. a second guide surface; 42. a through hole; 5. a tension spring; 6. a housing; 61. buckling the groove; 62. a rotation stopping block; 63. a slot; 64. a rotation stopping convex rib; 7. a protective outer sleeve; 71. and (4) a rotation stopping strip.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model provides a needle is used in cooperation of self-destruction formula safety insulin pen, as shown in fig. 1-3, including the casing subassembly, needle tubing 2, slider 3, protective sheath 4, elastic component and overcoat 7, the casing subassembly includes needle file 1 and shell 6 that the lock is connected, annular lock groove 61 has been seted up to the inner wall of shell 6 lower extreme, needle file 1 outer wall corresponds is provided with lock ring 11, lock ring 11 and lock groove 61 embedding cooperation, when shell 6 installs on needle file 1, through the mode of lock ring 11 lock joint in lock groove 61, can be with shell 6 along the axial on being fixed in needle file 1, in addition, in other embodiments, still can replace lock ring 11 with the mode of buckle connection and connect. In the present embodiment, the elastic member is provided as a tension spring 5. The needle seat 1, the needle tube 2, the telescopic spring 5, the sliding block 3, the protective sleeve 4, the shell 6 and the protective outer sleeve 7 are sequentially arranged along the axial direction. The protective sleeve 4 and the sliding block 3 are movably arranged on the shell component and are sleeved outside the needle tube 2.

As shown in fig. 5, the needle holder 1 is provided with a mounting sleeve 12, a through mounting hole 121 is formed in the mounting sleeve 12, the needle tube 2 is fixedly mounted in the mounting hole 121, the needle tube 2 is penetratingly mounted on the needle holder 1, the front end of the needle tube 2 relatively extends out of the front end of the housing 6, the needle holder 1 is integrally formed with a convex ring 13, and in other embodiments, the convex ring 13 may be disposed on the inner wall of the housing 6.

As shown in fig. 5-8, the sliding block 3 is correspondingly installed on the needle base 1, and the sliding block 3 can move axially relative to the housing assembly, a one-way limiting structure is arranged between the sliding block 3 and the needle base 1, the one-way limiting structure includes a convex ring 13 integrally formed on the needle base 1 and elastic flaps 31 integrally formed on the sliding block 3, the elastic flaps 31 are four flaps at equal intervals, and gaps 32 are formed between adjacent elastic flaps 31. When the trigger is in an unfired state, the elastic flap 31 is hooped and limited in the convex ring 13 by the convex ring 13, the elastic flap 31 has an outward expanding elastic force all the time, after the trigger is finished, the slide block 3 drives the elastic flap 31 to move axially to separate from the convex ring 13, the elastic flap 31 is opened outwards under the action of the elastic force of the elastic flap 31, so that the outer diameter of the lower end face of the slide block 3 is integrally larger than the inner diameter of the convex ring 13, and thus, when the slide block 3 is reversely pressed back, the end part of the elastic flap 31 is partially abutted against the end face of the convex ring 13 and cannot be retracted into the convex ring 13 again, and the effect of one-way movement limiting can be achieved.

As shown in fig. 5-8, the outer wall of the end of the protective sheath 4 inside the casing 6 is integrally formed with a buckle 41, and the buckle 41 is fit with the casing 6 in a retaining manner. Be equipped with the lock joint structure between slider 3 and the protective sheath 4, the lock joint structure includes integrated into one piece in four knot feet 33 of slider 3, and four knot feet 33 upwards extend along the axial, and the inboard of detaining foot 33 is equipped with first guide surface 331, and the outer wall of latch closure 41 corresponds and is equipped with second guide surface 411, and first guide surface 331 and second guide surface 411 direction cooperation, and detain foot 33 and latch closure 41 looks lock joint. When the protective sleeve 4 is pressed into the housing 6, the buckle 41 slides into the buckle leg 33 under the guiding action of the first guiding surface 331 and the second guiding surface 411, and when the protective sleeve 4 moves in the reverse direction, the buckle 41 abuts against the buckle leg 33, and the anti-dropping and connecting effects can be achieved between the buckle 41 and the buckle leg 33. The sliding block 3 is provided with a limiting and resisting table surface 34, the limiting and resisting table surface 34 is in limiting fit with the buckle 41, and a telescopic stroke for the movement of the buckle 41 is formed between the limiting and resisting table surface 34 and the buckle foot 33. When the protective sleeve 4 is pressed into the housing 6, the end surface of the ring buckle 41 abuts against the limiting and abutting table surface 34, and the limiting and abutting table surface 34 can limit and abut against the ring buckle 41.

As shown in fig. 5, the extension spring 5 is sleeved outside the mounting sleeve 12, the lower end of the extension spring 5 abuts against the needle base 1, the upper end of the extension spring 5 abuts against the protection sleeve 4, and the extension spring 5 drives the protection sleeve 4 to have a movement tendency away from the needle base 1 all the time. Under the elastic force action of the extension spring 5, the ring buckle 41 is matched with the shell 6 in an abutting mode, and the anti-falling limiting effect can be achieved on the protective sleeve 4.

As shown in fig. 3 and 7, the sliding block 3 is further integrally formed with an extension block 35, the protective sleeve 4 is provided with a through hole 42 for the extension block 35 to pass through, and the protective sleeve 4 is transparent. After the percussion is finished, because the needle file 1 is kept away from to slider 3 under the effect of expanding spring 5, extend in piece 35 corresponds and passes through hole 42 and stretch into protective sheath 4, and extend piece 35 and correspond and stretch out shell 6, user's accessible transparent protective sheath 4 direct observation extends piece 35 to show the completion state of percussion, realize visually, play better sign effect.

As shown in fig. 2 and 3, a rotation stopping structure is arranged between the housing 6 and the needle holder 1, the rotation stopping structure includes an insertion block 14 arranged on the outer wall of the needle holder 1 and a plurality of rotation stopping blocks 62 arranged on the inner wall of the housing 6, a slot 63 for inserting the insertion block 14 is formed between adjacent rotation stopping blocks 62, and the inner wall of the needle holder 1 is provided with a mounting thread 15. When needle file 1 and shell 6 lock, inserted block 14 can be pegged graft in slot 63 wantonly, and the installation is faster, nimble, when passing through the threaded installation insulin pen on needle file 1, can drive the rotation of needle file 1 through rotating shell 6, and it is more convenient to install.

As shown in fig. 3 and 4, the inner wall of the protective sheath 7 is provided with a plurality of rotation stopping strips 71, the outer wall of the housing 6 is correspondingly provided with a plurality of rotation stopping ribs 64, and when the protective sheath 7 is sleeved on the housing 6, the rotation stopping strips 71 are matched with the rotation stopping ribs 64 in a rotation stopping manner, so that an insulin pen can be conveniently installed on the needle base 1.

The utility model discloses a basic operating principle does: during the installation, install needle tubing 2 on needle file 1 earlier, then put into needle file 1 with expanding spring 5, insert the four lamella elastic lamella 31 of slider 3 lower part and form one-way spacing cooperation in the bulge loop 13 of needle file 1, again with protective sheath 4 coaxial arrangement in slider 3, make expanding spring 5 support in protective sheath 4, install shell 6 lock joint on needle file 1, make shell 6 cover in slider 3 and protective sheath 4, install protective sheath 7 on shell 6 at last, so, it is simpler to have a structure, the equipment is convenient, the higher effect of finished product qualification rate.

When the puncture needle is used, the front end of the protective sleeve 4 is abutted to an injection part of a human body and is pressed downwards with force, so that the protective sleeve 4 moves towards the inside of the shell 6 to realize a percussion process, the needle tube 2 is exposed to be pricked into skin for injection, at the moment, the buckle 41 of the protective sleeve 4 extends into the sliding block 3 under the matching action of the first guide surface 331 and the second guide surface 411 and moves in a telescopic stroke until the buckle 41 abuts against the limiting abutting table surface 34, and at the moment, the telescopic spring 5 is in a compressed state. After the injection is accomplished (percussion is accomplished promptly), the human body is kept away from to protective sheath 4 front end, makes protective sheath 4 outwards move under the spring action of expanding spring 5, and protective sheath 4 encloses outside needle tubing 2 again, and under the effect of lock joint structure, drives slider 3 displacement when protective sheath 4 outwards moves for slider 3 breaks away from needle file 1, and the elastic lamella 31 of slider 3 breaks away from bulge loop 13, radially outwards expands, and partial terminal surface of elastic lamella 31 supports with the bulge loop 13 terminal surface of needle file 1 and keeps off spacingly. So, after the percussion is accomplished, needle tubing 2 is in the protection state, even protective sheath 4 is pushed down, because it is spacing to keep out along the axial between slider 3 and the casing subassembly, slider 3 can not reverse retract in needle file 1 to make protective sheath 4 unable to retract, can prevent that needle tubing 2 pointed end from exposing protective sheath 4. Therefore, the disposable medical infusion set can be used for one time, avoids poor infection and has the effect of higher use safety.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims (10)

1. The utility model provides a self-destruction formula safety insulin pen is supporting with needle which characterized in that: comprises the following steps:

the shell assembly comprises a needle seat (1) and a shell (6) which are buckled and connected;

the needle tube (2) is fixedly arranged on the needle seat (1), and the front end of the needle tube (2) extends out of the shell component;

the sliding block (3) is movably arranged in the shell component;

the protective sleeve (4) is movably arranged on the shell component and sleeved outside the needle tube (2); and

the elastic piece drives the protective sleeve (4) to extend out of the shell assembly;

a one-way limiting structure is arranged between the sliding block (3) and the shell assembly, a fastening structure is arranged between the sliding block (3) and the protective sleeve (4), and the protective sleeve (4) is in anti-falling fit with the shell assembly;

one end of the sliding block (3) is fixed on the shell component in an unfired state; after the percussion is finished, the sliding block (3) is separated from the needle seat (1) and is abutted and limited with the shell assembly.

2. The self-destructive safe insulin pen matched needle as claimed in claim 1, which is characterized in that: one-way limit structure include integrated into one piece in bulge ring (13), the integrated into one piece of needle file (1) in elasticity lamella (31) of slider (3), under the unfired state, elasticity lamella (31) with bulge ring (13) inner wall pastes the cooperation, and the back is accomplished in the percussion, elasticity lamella (31) are kept away from bulge ring (13) and outside expansion, elasticity lamella (31) with bulge ring (13) are along the axial to keep out spacingly.

3. The self-destructive safe insulin pen matched needle as claimed in claim 2, which is characterized in that: the elastic petals (31) are arranged into four petals at equal intervals, and gaps (32) are formed between the adjacent elastic petals (31).

4. The self-destructive safe insulin pen matched needle as claimed in claim 1, which is characterized in that: protective sheath (4) are located tip outer wall integrated into one piece in shell (6) has latch closure (41), latch closure (41) with shell (6) anticreep cooperation.

5. The self-destructive safe insulin pen matched needle as claimed in claim 4, which is characterized in that: the fastening structure comprises a plurality of fastening feet (33) integrally formed on the sliding block (3), a first guide surface (331) is arranged on the inner side of each fastening foot (33), a second guide surface (411) is correspondingly arranged on the outer wall of the buckle (41), the first guide surface (331) is matched with the second guide surface (411) in a guiding manner, and the fastening feet (33) are fastened with the buckle (41).

6. The self-destructive safe insulin pen matched needle as claimed in claim 5, which is characterized in that: the sliding block (3) is provided with a limiting and resisting table board (34), the limiting and resisting table board (34) is in limiting fit with the buckle (41), and a telescopic stroke for the movement of the buckle (41) is formed between the limiting and resisting table board (34) and the buckle foot (33).

7. The self-destructive safe insulin pen matched needle as claimed in claim 1, which is characterized in that: still integrated into one piece has extension piece (35) on slider (3), the confession has been seted up in protective sheath (4) through hole (42) that extension piece (35) passed, protective sheath (4) set up to transparent.

8. The self-destructive safe insulin pen matched needle as claimed in claim 1, which is characterized in that: the elastic piece is set to be an expansion spring (5), one end of the expansion spring (5) is abutted to the needle seat (1), the other end of the expansion spring (5) is abutted to the protective sleeve (4), and the expansion spring (5) drives the protective sleeve (4) to have a movement trend away from the needle seat (1) all the time.

9. The self-destructive safe insulin pen matched needle as claimed in claim 1, which is characterized in that: the inner wall of the shell (6) is provided with a buckling groove (61), the outer wall of the needle base (1) is correspondingly provided with a buckling ring (11), and the buckling ring (11) is matched with the buckling groove (61) in an embedded mode.

10. The self-destructive safe insulin pen matched needle as claimed in claim 1, which is characterized in that: shell (6) with be provided with between needle file (1) and spline the structure, spline the structure including locating inserted block (14) of needle file (1) outer wall, locate a plurality of blocks (62) that spline of shell (6) inner wall, adjacent it supplies to form between the blocks (62) inserted block (14) male slot (63), needle file (1) inner wall is provided with mounting thread (15).

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